Printer maintenance carousel system and method

Abstract

To provide a maintenance carousel used for a printer.SOLUTION: There is provided a maintenance carousel for collecting waste ink ejected by one or more print heads of an inkjet printer. In some instances, the maintenance carousel includes a tray and an actuator assembly retained within an enclosure. The actuator assembly is configured to drive rotation (e.g., indexing) of the tray each time the print heads eject the waste ink into the maintenance carousel. This rotation causes the ink to accumulate within a tray of the maintenance carousel in a circular pattern. In some instances, the maintenance carousel includes electrostatic plates configured to generate an electromagnetic field which may improve collection of small droplets or aerosolized particles of the waste ink. In further instances, the maintenance carousel includes a fan assembly configured to generate an airflow through the maintenance carousel such that small droplets or aerosolized particles of the waste ink are collected by one or more filters.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS none [Background technology]

[0002] Inkjet printers use printheads to spray tiny droplets of ink onto paper to generate images or text. During operation, an inkjet printer's printhead (or printheads) typically "spits" or ejects small amounts of ink into a waste area. The ejection of waste ink keeps the printhead's nozzles fresh and prevents print quality from deteriorating over time. However, waste ink tends to accumulate in the waste area and can, in some cases, interfere with the operation of the printer. For example, waste ink may accumulate in vertical structures or "stalagmites" that extend upward and away from the waste area. If enough waste ink accumulates, these stalagmites can eventually grow tall enough to contact the printer's printhead or other components. This can lead to print quality impairments, the potential for waste ink to leak back into the printhead, or other undesirable results.

[0003] Some printers utilize absorbent pads positioned in the waste area to collect waste ink. However, over time, the felt pads can become saturated with ink to the point that they no longer absorb the waste ink deposited by the printhead and waste ink can accumulate on the pad. This means that users must periodically replace the saturated pads with fresh ones. This leads to inconvenience and increased costs for consumers who purchase and manually install replacement felt pads. Furthermore, fixed waste ink collection mechanisms, such as replaceable pads, create the problem of waste ink repeatedly settling in the same location. That is, waste ink can tend to accumulate in vertical structures (e.g., stalagmites). These vertical structures can grow large enough, for example, to affect the printhead and disrupt printer operation.

[0004] Furthermore, printheads often emit waste ink in the form of droplets or aerosol particles that are not easily collected. The aerosol particles of waste ink may travel to other undesirable locations within the printer and accumulate, for example, on critical components of the printer. In this manner, ineffective collection of waste ink can lead to damage or malfunction of the printer. Summary of the Invention [Problem to be solved by the invention]

[0005] Due to at least the above problems, a need exists for a waste ink collection mechanism that reduces the likelihood of waste ink accumulating in vertical formations that could interfere with the operation of the inkjet printer. Additionally, it is desirable for waste ink collection mechanisms to provide improved effectiveness in collecting aerosol particle droplets of waste ink that may otherwise tend to accumulate in undesirable and potentially harmful areas within the printer. In this manner, improved waste ink collection mechanisms could reduce costs to consumers and / or increase the potential lifespan of inkjet printers. [Means for solving the problem]

[0006] The present disclosure relates to a maintenance carousel for use with a printer.

[0007] A maintenance carousel for collecting waste ink in a printer is disclosed. The maintenance carousel includes an enclosure in the form of a shroud and a shroud cover coupled to the shroud. The shroud cover includes an opening through which waste ink can be deposited into the maintenance carousel. The maintenance carousel includes a tray supported for rotation within the shroud. The maintenance carousel also includes an actuator assembly in communication with the tray. The actuator assembly includes a one-way clutch configured to allow rotation only in a first direction, an actuator positioned to cause rotation of the one-way clutch, and a gear unit configured to rotate in unison with the one-way clutch. The gear unit is designed to engage the tray.

[0008] In some aspects, the printer is configured to drive rotation of the tray by engaging an actuator assembly and impacting the actuator each time one or more printheads of the printer deposit waste ink onto the maintenance carousel.

[0009] In yet another aspect, the maintenance carousel includes a spring extending between an anchor positioned on the shroud cover and a hook-like portion of the actuator.

[0010] In some aspects, the spring applies a restoring force to the actuator in response to the printer engaging the actuator.

[0011] In another aspect, the shroud includes a stop positioned to limit rotation of the actuator in response to a restoring force.

[0012] In some embodiments, the direction of rotation of the actuator in response to being engaged by the printer corresponds to a first direction of rotation, and a one-way clutch prevents the actuator assembly from driving rotation of the tray when the actuator rotates in response to the restoring force.

[0013] In some embodiments, the actuator assembly is configured to drive rotation of the tray, and the shroud includes one or more bent tabs positioned to apply friction to the tray when the actuator assembly drives rotation of the tray.

[0014] In some aspects, an absorbent pad is positioned within the tray and configured to absorb waste ink dispensed from the printer, the absorbent pad being provided in the form of a felt.

[0015] In some aspects, the actuator assembly causes the indexing of the tray.

[0016] In some embodiments, the waste ink accumulates in a circular pattern in the tray.

[0017] A maintenance carousel including an electrostatic plate for collecting waste ink in a printer is disclosed. The maintenance carousel includes a shroud and a shroud cover associated with the shroud. The shroud cover includes one or more electrostatic plate housings. The one or more electrostatic plates are at least partially disposed within the one or more electrostatic plate housings and configured to generate an electromagnetic field. The maintenance carousel also includes a tray supported for rotation within the shroud and an actuator assembly configured to drive rotation of the tray. The actuator assembly includes an actuator and a clutch.

[0018] In some embodiments, the one or more electrostatic plates are provided in the form of two electrostatic metal plates having linear panels with one or more contact points.

[0019] In yet another embodiment, the two electrostatic plates are in communication with a transformer configured to apply a voltage to the electrostatic plates.

[0020] In some aspects, the electromagnetic field attracts droplets or aerosol particles of waste ink towards an electrostatic plate.

[0021] A maintenance carousel including a fan assembly for collecting waste ink in a printer is disclosed. The maintenance carousel includes an enclosure including one or more openings designed to receive waste ink from the printer, a tray disposed within the enclosure, and an actuator assembly in communication with the tray. The actuator assembly includes an actuator, a clutch, and a gear unit configured to rotate with the clutch. The maintenance carousel also includes a fan assembly in communication with the enclosure and the tray. The fan assembly is configured to generate airflow through the maintenance carousel. An internal component of the printer engages the actuator assembly and is configured to drive rotation of the tray by striking the actuator each time one or more printheads of the printer deposit waste ink onto the maintenance carousel.

[0022] In some embodiments, at least one window is formed in the tray, the at least one window allowing air to flow from the tray to the exterior of the enclosure.

[0023] In some aspects, the fan assembly is configured to draw air into the maintenance carousel through one or more openings and expel air from the maintenance carousel through an output area associated with the fan tunnel.

[0024] In some embodiments, one or more filters are positioned in the fan tunnel between the fan assembly and the tray.

[0025] In some embodiments, the fan tunnel includes one or more dividers configured to hold the fan assembly in place and one or more studs configured to hold the one or more filters in place.

[0026] In some embodiments, the one or more filters are provided in the form of a reticulated polyurethane foam. [Brief explanation of the drawings]

[0027] [Figure 1] FIG. 1 illustrates a front isometric view of a first exemplary printer. [Figure 2] FIG. 2 illustrates a rear isometric view of the printer of FIG. 1. [Figure 3] FIG. 2 illustrates an isometric view of the printer of FIG. 1 in an open configuration. [Figure 4] FIG. 4 illustrates an isometric view of a first exemplary maintenance carousel for use with the printer of FIGS. 1-3 constructed in accordance with the teachings of the present disclosure. [Figure 5] FIG. 5 illustrates a top isometric view of a tray of the maintenance carousel of FIG. 4. [Figure 6] 6 illustrates a cross-sectional view of the tray of FIG. 5 taken along line 6-6 of FIG. 5. [Figure 7] FIG. 6 illustrates a top view of the tray of FIG. 5. [Figure 8] FIG. 5 illustrates an isometric view of an absorbent pad of the maintenance carousel of FIG. 4. [Figure 9] 9 illustrates a top view of the absorbent pad of FIG. 8 placed in the tray of FIG. 5. [Figure 10] FIG. 6 illustrates a bottom isometric view of the tray of FIG. 5. [Figure 11] FIG. 6 illustrates an isometric view of the actuator assembly of the maintenance carousel of FIG. 4 positioned adjacent to the tray of FIG. 5. [Figure 12] FIG. 12 illustrates an isometric view of a post of the actuator assembly of FIG. 11. [Figure 13] FIG. 12 illustrates an isometric view of the washer of the actuator assembly of FIG. 11. [Figure 14] 14 illustrates an isometric view of the post of FIG. 12 with the washer of FIG. 13 and the one-way clutch of the actuator assembly of FIG. 11 disposed thereon. [Figure 15] FIG. 12 illustrates a side elevation view of the gear unit of the actuator assembly of FIG. 11. [Figure 16] FIG. 16 illustrates a top isometric view of the gear unit of FIG. [Figure 17] FIG. 12 illustrates a side isometric view of a portion of the actuator assembly of FIG. 11. [Figure 18] FIG. 18 illustrates a top isometric view of the portion of the actuator assembly of FIG. 11 shown in FIG. 17. [Figure 19] FIG. 12 illustrates an isometric view of the actuator of the actuator assembly of FIG. 11. [Figure 20] FIG. 20 illustrates a bottom view of the actuator of FIG. 19. [Figure 21] FIG. 20 illustrates a bottom isometric view of the actuator of FIG. 19. [Figure 22] FIG. 12 illustrates a bottom isometric view of the actuator assembly of FIG. 11 positioned adjacent to the tray of FIG. 5. [Figure 23] FIG. 5 illustrates a top view of the shroud of the maintenance carousel of FIG. 4. [Figure 24] FIG. 24 illustrates an isometric view of the shroud of FIG. 23. [Figure 25] FIG. 24 illustrates an enlarged view of a portion of the shroud of FIG. 23 including an actuator assembly well. [Figure 26] FIG. 24 illustrates an enlarged view of a portion of the shroud of FIG. 23 including a bent tab. [Figure 27] FIG. 24 illustrates an isometric view of the tray of FIG. 5 positioned within the shroud of FIG. 23. [Figure 28] 28 illustrates a cross-sectional view of the tray of FIG. 5 disposed within the shroud of FIG. 23 taken along line 28-28 of FIG. 27. [Figure 29] FIG. 5 illustrates a top view of the shroud cover of the maintenance carousel of FIG. 4. [Figure 30] FIG. 30 illustrates a top isometric view of the shroud cover of FIG. 29. [Figure 31] FIG. 30 illustrates a bottom isometric view of the shroud cover of FIG. 29. [Figure 32] FIG. 30 illustrates an enlarged view of a portion of the shroud cover of FIG. 29 including the connection tabs. [Figure 33] FIG. 30 illustrates an enlarged view of a portion of the shroud cover of FIG. 29 including a receiving member. [Figure 34] FIG. 24 illustrates an enlarged view of a portion of the shroud of FIG. 23 including the latch and pin member. [Figure 35] FIG. 5 illustrates a top isometric view of the maintenance carousel of FIG. 4. [Figure 36] FIG. 5 illustrates a side elevation view of the maintenance carousel of FIG. 4. [Figure 37] FIG. 5 illustrates an enlarged view of a portion of the second exemplary printer with the maintenance carousel of FIG. 4 installed therein. [Figure 38] FIG. 4 illustrates a top isometric view of a second exemplary maintenance carousel for use with the printer of FIGS. 1-3 constructed in accordance with the teachings of the present disclosure. [Figure 39] FIG. 39 illustrates a top isometric view of a tray of the maintenance carousel of FIG. 38. [Figure 40] FIG. 40 illustrates a top isometric view of the tray of FIG. 39 with an absorbent pad disposed thereon and an actuator assembly of the maintenance carousel of FIG. 38 positioned adjacent thereto. [Figure 41] FIG. 39 illustrates an isometric view of the shroud of the maintenance carousel of FIG. 38. [Figure 42] FIG. 39 illustrates a bottom isometric view of the shroud cover of the maintenance carousel of FIG. 38. [Figure 43] FIG. 39 illustrates an isometric view of the electrostatic plate of the maintenance carousel of FIG. 38. [Figure 44] 44 illustrates a cross-sectional view of the maintenance carousel of FIG. 38 taken along line 44-44 of FIG. 38. [Figure 45] FIG. 4 illustrates a top view of a third exemplary maintenance carousel for use with the printer of FIGS. 1-3 constructed in accordance with the teachings of the present disclosure. [Figure 46]FIG. 46 illustrates a front and top isometric view of the maintenance carousel of FIG. 45. [Figure 47] FIG. 46 illustrates a front and top isometric view of a tray of the maintenance carousel of FIG. 45. [Figure 48] 46 illustrates a front and top isometric view of the absorbent pad of the maintenance carousel of FIG. 45. FIG. [Figure 49] 48 is disposed thereon and an actuator assembly of the maintenance carousel of FIG. 45 is positioned adjacent thereto.

[0082] FIG. 49 illustrates a front and top isometric view of the tray of FIG. 47 with the absorbent pad of FIG. 48 disposed thereon and the actuator assembly of the maintenance carousel of FIG. 45 positioned adjacent thereto. [Figure 50] FIG. 46 illustrates a bottom view of the shroud of the maintenance carousel of FIG. 45. [Figure 51] FIG. 51 illustrates a front and top isometric view of the shroud of FIG. 50. [Figure 52] FIG. 46 illustrates a bottom isometric view of the shroud cover of the maintenance carousel of FIG. [Figure 53] 51 illustrates an isometric view of the shroud of FIG. 50 with the fan assembly and filter of the maintenance carousel of FIG. 45 disposed thereon. [Figure 54] FIG. 53 illustrates an isometric view of the maintenance carousel of FIG. 45 with the shroud cover of FIG. 52 removed.

[0028] While the present disclosure is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will hereinafter be described in detail. It should be understood, however, that the drawings and detailed description presented herein are not intended to limit the present disclosure to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims. DETAILED DESCRIPTION OF THE INVENTION

[0029] Before describing any embodiment in detail, it is to be understood that the present disclosure is not limited in its application to the details of construction and arrangement of components set forth in the following description or illustrated in the following drawings, but rather only by the claims that follow this disclosure. The present disclosure is capable of other embodiments and of being practiced or carried out in various ways. It is also to be understood that the phraseology and terminology used herein is for purposes of description and should not be regarded as limiting. The use of "including," "comprising," or "having," and variations thereof, herein is meant to encompass the items listed thereafter and equivalents thereof, as well as additional items. Unless otherwise specified or limited, the terms "mounted," "connected," "supported," and "coupled," and variations thereof, are used broadly and encompass both direct and indirect mounting, connecting, supporting, and coupling. Furthermore, "connected" and "coupled" are not limited to physical or mechanical connections or couplings.

[0030] The following description is presented to enable those skilled in the art to make and use embodiments of the present disclosure. Various modifications to the illustrated embodiments will be readily apparent to those skilled in the art, and the general principles herein can be applied to other embodiments and applications without departing from the embodiments of the present disclosure. That is, the embodiments of the present disclosure are not intended to be limited to the embodiments shown, but rather are to be accorded the widest scope consistent with the principles and features disclosed herein. The following detailed description should be read with reference to the figures, in which like elements in different figures have the same reference numerals. Those skilled in the art will recognize that the examples provided herein have many useful alternatives and fall within the scope of the embodiments of the present disclosure.

[0031] Additionally, while the following discussion may describe features associated with particular devices or embodiments, it is understood that additional devices and / or features can be used in conjunction with the described systems and methods, and that the devices and features discussed are used to provide examples of possible embodiments without limitation.

[0032] 1-3, an exemplary inkjet printer 100 may have a housing 101 defining a front side 102, a rear side 104, a left side 106, and a right side 108. The housing 101 is provided in the form of a base portion 110 and an enclosure cover 112. The base portion 110 and the enclosure cover 112 may be removably opened and / or attached to provide access to the internal components of the printer 100 to allow for installation or maintenance of the internal components. The enclosure cover 112 may be hingedly coupled to the base portion 110 through a hinge 114 positioned adjacent the left side 106 of the printer 100. For example, the enclosure cover 112 may be rotatable about the hinge 114 relative to the base portion 110 in the direction indicated by arrow 116 in FIG. 1 to convert the printer 100 from a closed configuration (see FIG. 1 ) to an open configuration (see FIG. 3 ).

[0033] The base portion 110 may include a control panel 118 positioned on the front side 102 of the printer 100. The control panel 118 may include a display 120 and one or more buttons 122. Together, the display 120 and the one or more buttons 122 may provide an interface through which a user may observe, control, or initiate one or more settings or operations of the printer 100. The base portion 110 may also include an exit slot 124 positioned on the front side 102 of the printer 100, where paper or other print media may be ejected from the printer 100 and removed by a user.

[0034] The enclosure cover 112 may include a cover handle 126 that may bias the printer 100 toward a closed configuration. The cover handle 126 may be positioned on the right side 108 of the printer 100. A user may release the enclosure cover 112 for rotation relative to the base portion 110 by, for example, applying upward pressure on the cover handle 126. Additionally, an observation window 128 may be disposed on the enclosure cover 112 and may be positioned to provide a user with visibility of one or more internal components of the printer 100.

[0035] 2, the back side 104 of printer 100 may include a power switch 130 configured to power printer 100 on or off, a power port 132 that may facilitate connection between printer 100 and an external power source (not shown), and one or more ports 134. The one or more ports 134 may include, for example, an Ethernet port, a USB port, and / or any other suitable port configured to connect printer 100 with an external network or device. Back side 104 may also include an input slot 136 configured to receive and feed an external source of paper (e.g., continuous form paper) or other printable media (not shown) into printer 100.

[0036] As best shown in FIG. 3 , converting the printer 100 to an open configuration can expose one or more internal components of the printer 100. The printer 100 can include a carriage 138 that supports a printhead 140 and one or more ink cartridges 142. The printhead 140 can be configured to eject ink from the ink cartridges 142 onto a desired medium. The carriage 138 can be slidably coupled to a gantry 144 that extends between the left side 106 and the right side 108 of the printer 100. For example, the carriage 138 can be positioned for linear or translational movement along the gantry 144. That is, when the printer 100 is in use, the carriage 138 can transport the printhead 140 back and forth along the gantry 144 while the printhead 140 applies ink from one or more ink cartridges 142 to paper or another suitable medium (not shown).

[0037] The base portion 110 can support a maintenance station 146 positioned adjacent the right side 108 of the printer 100. The maintenance station 146 can be positioned generally below the printhead 140 and the gantry 144 and can include one or more components configured to facilitate maintenance on or upkeep of the printhead 140 and / or other components of the printer 100. For example, the maintenance station 146 can include an optional maintenance brush 148 configured to clean (e.g., remove dried ink therefrom) the printhead 140 and a waste ink reservoir 150 positioned to collect waste ink released by the printhead 140 during operation of the printer 100. As discussed below, the waste ink reservoir 150 can be provided in the form of a maintenance carousel, which is discussed with respect to FIGS. 4-54.

[0038] Although a particular exemplary inkjet printer 100 has been described with reference to Figures 1-3, it should be appreciated that the inkjet printer 100 for use with the maintenance carousel disclosed herein may include or exclude additional components known in the art.

[0039] 4, a maintenance carousel 200 may be provided for use with printer 100 or any other suitable printing device. Maintenance carousel 200 may be installed within or otherwise configured for use with printer 100 or another inkjet printer in a manner known in the art. In particular, maintenance carousel 200 may be installed in inkjet printer 100 adjacent or proximate to the area where ink is ejected from printhead 140.

[0040] The maintenance carousel 200 may include a shroud 202 and a shroud cover 204 disposed above and detachably coupled to the shroud 202. Together, the shroud 202 and the shroud cover 204 may form an enclosure capable of holding one or more internal components of the maintenance carousel 200. The actuator assembly 206 may be partially disposed within the enclosure such that at least a portion of the actuator assembly 206 can emerge above the shroud cover 204, as seen in FIG. 4 . The enclosure formed by the shroud 202 and the shroud cover 204 may be configured to collect waste ink (e.g., deposited by the printheads 140). That is, the shroud cover 204 may include one or more openings 208 that allow waste ink to be deposited within the maintenance carousel 200.

[0041] Turning to FIG. 5 , a tray 210 configured to collect waste ink can be disposed within the enclosure formed by the shroud 202 and the shroud cover 204. The tray 210 is provided in the form of a base 212, a sidewall 214, and a lip 216. The base 212 can be substantially flat and circular in shape. The sidewall 214 extends upwardly from the base 212 and terminates at the lip 216. The lip 216 can be substantially annular in shape and can extend outwardly away from the sidewall 214. In some cases, the base 212, the sidewall 214, and the lip 216 can be integrally formed with one another. In other cases, the base 212 can be coupled to and surround a lower perimeter 218 of the sidewall 214, and the lip 216 can be coupled to and extend outwardly from an upper perimeter 220 of the sidewall 214.

[0042] 5 and 10, the first plurality of teeth 221 of the sidewall 214 may be circumscribed around the upper periphery 220 of the sidewall 214 (e.g., positioned adjacent to and directly below the lip 216). The first plurality of teeth 221 may be circumscribed around the upper periphery 220 of the sidewall 214 and may be evenly radially spaced apart from one another. Each of the first plurality of teeth 221 may be substantially the same size and may be substantially triangular or substantially trapezoidal in shape. Alternatively, each of the first plurality of teeth 221 may be provided with any suitable shape or size.

[0043] The tray 210 can be formed from a non-absorbent material. In some cases, the tray 210 can be formed from polypropylene, polycarbonate / acrylonitrile butadiene styrene (PC-ABS), polyoxymethylene (POM), combinations thereof, or other similar materials. In other cases, the tray 210 can be formed from a metal, a ceramic material, or any other suitable material. The tray 210 can be formed from a suitable material in that the material can be selected so as not to be corroded by the ink collected therein. The tray 210 may collect water-based ink, and therefore, a tray 210 formed from a material that absorbs ambient moisture (e.g., nylon) may have difficulty maintaining its shape during use of the maintenance carousel 200 and may be considered undesirable.

[0044] In some cases, the base 212 of the tray 210 may include a tray support structure 222 to provide stability and / or structural rigidity to the tray 210 or the overall maintenance carousel 200. As shown in Figure 5, the tray support structure 222 is provided in the form of a plurality of wall members 224 arranged in a grid pattern across at least a portion of the base 212. In other cases, the tray support structure 222 may be provided in any other suitable form or may be omitted.

[0045] As best shown in FIG. 6 , the height H of the tray 210 can be defined by the distance between the base 212 and the upper perimeter 220 of the sidewall 214 measured in a direction substantially perpendicular to the base 212. The height H can be given a value of about 5 millimeters (mm) to about 100 mm, or 5 mm to 100 mm. For example, the height H can be given a value of at least about 10 mm (or 10 mm), at least about 20 mm (or 20 mm), at least about 30 mm (or 30 mm), at least about 40 mm (or 40 mm), at least about 50 mm (or 50 mm), at least about 60 mm (or 60 mm), at least about 70 mm (or 70 mm), at least about 80 mm (or 80 mm), or at least about 90 mm (or 90 mm). In some cases, the height H can be given a value of about 35 mm (or 35 mm). The value given to the height H may be selected depending, at least in part, on the tolerable aerosol levels and / or available aerosol mitigation technology. Additionally, the height H may be adjusted based on the particular dimensions of the printer 100 to include the maintenance carousel 200.

[0046] The hollow receiving post 226 can be integrally formed with the base 212, or the hollow receiving post 226 can be coupled to and extend upwardly therefrom. The receiving post 226 can be substantially cylindrical or substantially frusto-conical in shape. The cavity 228 can be defined by a sidewall 227 of the receiving post 226 and can extend at least partially therethrough (see FIG. 6 ). The receiving post 226 can be positioned at the center of the base 212. As best shown in FIG. 7 , the receiving post 226 can be positioned on the base 212 so as to be substantially equidistant from each point along the sidewall 214. The receiving post 226 can be integrally formed with the base 212, or the hollow receiving post 226 can be coupled to and extend upwardly therefrom.

[0047] 7, the radius R of the tray 210 can be defined by the radial distance between the center C of the receiving post 226 and the sidewall 214. The radius R can have a value of about 15 mm to about 200 mm (or 15 mm to 200 mm). For example, the radius R can be at least about 20 mm (or 20 mm), at least about 30 mm (or 30 mm), at least about 40 mm (or 40 mm), at least about 50 mm (or 50 mm), at least about 60 mm (or 60 mm), at least about 70 mm (or 70 mm), at least about 80 mm (or 80 mm), at least about 90 mm (or 90 mm), at least about 100 mm (or 100 mm), at least about 110 mm (or 110 mm), or at least about 120 mm (or 120 mm). The radius R may be given a value of about 110 mm (or 110 mm), at least about 120 mm (or 120 mm), at least about 130 mm (or 130 mm), at least about 140 mm (or 140 mm), at least about 150 mm (or 150 mm), at least about 160 mm (or 160 mm), at least about 170 mm (or 170 mm), at least about 180 mm (or 180 mm), or at least about 190 mm (or 190 mm). In some cases, the radius R may be given a value of about 50 mm (or 50 mm). The value given for the radius R may be selected depending at least in part on the layout of the printhead and the space available within the printer.

[0048] 5 , the tray 210 may include one or more fins 230 disposed along and extending inwardly from the sidewall 214 (e.g., toward the receiving posts 226) and configured to prevent rotation of the absorbent pad 234 within the tray 210. The fins 230 may be integrally formed with and extend inwardly from the sidewall 214. Additionally or alternatively, the fins 230 may be integrally formed with and extend upwardly from the base 212. In instances where the base 212 includes a tray support structure 222, the fins 230 may be integrally formed with or coupled to and extend upwardly from the tray support structure 222. In some instances, each fin 230 may be connected to each of the sidewall 214 and the tray support structure 222. The fins 230 may substantially circumscribe the base 212 and may be radially spaced apart around the lower perimeter 218 of the sidewall 214. 5 and 7, the tray 210 may include four fins 230 arranged in regular 90-degree intervals around the lower perimeter 218. However, in other cases, the tray 210 may include any number of fins 230 arranged in any suitable arrangement.

[0049] 8 and 9, the absorbent pad 234 can be designed to be positioned within the tray 210. In some forms, the absorbent pad 234 can be substantially annular in shape and defined by an outer diameter 236 and an inner diameter 238. The outer diameter 236 can correspond to and be substantially the same dimension as the lower perimeter 218 of the sidewall 214. The inner diameter 238 can define a central opening 240. The opening 240 can correspond to and be configured to receive the receiving post 226 when the absorbent pad 234 is positioned within the tray 210. One or more slots 242 corresponding to one or more fins 230 of the tray 210 can be disposed around the outer diameter 236 of the absorbent pad 234 and can extend entirely through the absorbent pad 234. 9, the absorbent pad 234 may include four slots 242 evenly radially spaced from one another (e.g., mirroring the arrangement of the fins 230) around the outer diameter 236. Thus, when the absorbent pad 234 is positioned within the tray 210, each slot 242 can receive one fin 230. In this manner, the fins 230 and slots 242 can prevent rotation or movement of the absorbent pad 234 relative to the tray 210 while the maintenance carousel 200 is in use. In other cases, the absorbent pad 234 may include any number of slots 242. However, the number of slots 242 in the absorbent pad 234 may be equal to the number of fins 230 in the tray 210, and the slots 242 and fins 230 may be complementary arranged around the outer diameter 236 and lower perimeter 218, respectively.

[0050] That is, the absorbent pad 234 can rest on the tray support structure 222 when placed on the tray 210. In cases where the tray support structure 222 is omitted, the absorbent pad 234 can rest directly on the base 212. In either case, the position and / or orientation of the absorbent pad 234 relative to the tray 210 can be fixed by the engagement between the fins 230 and the slots 242. In some cases, the absorbent pad 234 can be provided in the form of a felt pad. In other cases, the absorbent pad 234 can be provided in the form of a foam sponge, a fiber mat, a superabsorbent polymer, a combination thereof, or any other similar absorbent material. Thus, the absorbent pad 234 can absorb waste ink deposited within the maintenance carousel 200 while it is wet. As the waste ink dries and / or the absorbent pad 234 becomes increasingly saturated, waste ink may begin to accumulate on the absorbent pad 234. The indexing performed by the maintenance carousel 200 (described below with reference to FIG. 37) can impart a substantially circular shape to ink accumulated on the absorbent pad 234. In this manner, the maintenance carousel 200 can prevent or impede the growth of ink accumulation into vertical formations (e.g., stalagmites) that could interfere with the operation of one or more components of the printer.

[0051] 11 , the actuator assembly 206 can be positioned adjacent to and engage with the tray 210. The actuator assembly 206 is provided in the form of a post 246, a one-way clutch 248 disposed along the post 246, a gear 250 surrounding the post 246 and supported by a gear support 252, and an actuator 254 positioned at the end of the post 246. The gear 250 can include a second plurality of teeth 256 projecting outwardly therefrom, which can be provided with a complementary shape to the first plurality of teeth 221 of the tray 210. Thus, the gear 250 can be configured to engage the first plurality of teeth 221 to drive rotation of the tray 210. In some cases, the gear 250 can be provided in the form of polyoxymethylene (POM), which provides a desirable level of friction during engagement between the first plurality of teeth 221 and the second plurality of teeth 256. In other cases, the gear 250 can be formed from any suitable material.

[0052] 12, post 246 is provided in the form of a body 257 having a first end 258 and an opposite second end 260. Groove 262 may be positioned along post 246 between first end 258 and second end 260, and may be located closer toward second end 260 than toward first end 258. However, in other cases, groove 262 may be positioned in any suitable location on body 257.

[0053] The body 257 of the post 246 is defined by a first lower segment 264 positioned between the groove 262 and the first end 258 and a second upper segment 266 positioned between the groove 262 and the second end 260. The first segment 264 may be substantially cylindrical in shape. The second segment 266 may include a cylindrical portion 268 proximate the groove 262 and a stepped notched portion 270 proximate the second end 260. The cylindrical portion 268 may be substantially cylindrical in shape and may have substantially the same characteristics as the first segment 264. The notched portion 270 may have substantially the same cylindrical structure as the first segment 264 and the cylindrical portion 268, except that the notched portion 270 may have a portion "skimmed" from the cylindrical structure. Notch portion 270 may include a vertical wall 272 provided in the form of a substantially smooth and / or flat surface extending in a direction substantially parallel to central longitudinal axis A of post 246. Notch portion 270 may further include a ridge 274 adjacent vertical wall 272. Ridge 274 may be provided in the form of a substantially flat or smooth surface extending in a direction substantially perpendicular to axis A. However, in other cases, notch portion 270 may be provided with any suitable shape or configuration.

[0054] 13 , a washer 276 designed to reduce stress on or more evenly distribute forces applied to the actuator assembly 206 while the maintenance carousel 200 is in use can be installed in the groove 262 on the post 246. The washer 276 can be substantially annular in shape, having a substantially circular outer edge 278 and a substantially circular central opening 280. The washer 276 can include an entry slot 282 that forms an opening from the central opening 280 to the outer edge 278. In some cases, one or more notches 284 can be formed in the washer 276 adjacent the central opening 280. In some cases, the washer 276 includes two notches 284. In other cases, the washer 276 can include any number of notches 284 or can exclude a notch 284.

[0055] As shown in FIG. 14 , the washer 276 can be installed or positioned in the groove 262 along the post 246. The washer 276 can be pressed into the groove so that the entry slot 282 receives the post 246. That is, the washer 276 can be coupled to the post 246, for example, by a press fit. The one-way clutch 248 can be positioned along the first segment 264 of the post 246 and can be located proximate to the washer 276 and the groove 262. The one-way clutch 248 can be provided in the form of an annular cylinder. The one-way clutch 248 can include an inner diameter 286 and an outer diameter 288. The inner diameter 286 can have substantially the same structure and / or dimensions as the first segment 264 so that the post 246 can be inserted therethrough. The one-way clutch 248 can be configured to allow rotation in one direction and prevent rotation in the opposite direction. Alternatively, clutch 248 may allow clockwise rotation and prevent counterclockwise rotation, or vice versa.

[0056] 15, gear 250 can be positioned on gear support 252. Gear 250 and gear support 252 can be integrally formed with one another, or gear 250 can be coupled to gear support 252. Gear support 252 is provided in the form of member 289 having a body portion 290 and a neck portion 292. Gear 250, body portion 290, and neck portion 292 can each be substantially annular in shape and can be provided in the form of a coaxial structure (e.g., when actuator assembly 206 is assembled, gear 250 and gear support 252 can each be formed about axis A of post 246, see FIG. 17). Gear 250 and gear support 252 can together comprise gear unit 294.

[0057] The gear unit 294 may include a first end 296, a second end 298, and a channel 300 extending therebetween. The channel 300 may include a lower channel 302 and an upper channel 304. The lower channel 302 may extend from the first end 296 of the gear unit 294, entirely through the body portion 290, and through at least a portion of the neck portion 292. The lower channel 302 may be provided in the form of a substantially cylindrical conduit configured to receive the post 246. The upper channel 304 may extend from the second end 298 of the gear unit 294, entirely through the gear 250, and through at least a portion of the neck portion 292 until the upper and lower channels 304 and 302 converge. The upper channel 304 may also be provided in the form of a substantially cylindrical conduit. However, the upper channel 304 may be configured to receive the one-way clutch 248. The inner diameter of the upper channel 304 can correspond to or be substantially equal to the outer diameter 288 of the one-way clutch 248. In some cases, the gear 250 can include one or more recesses 306 disposed at the second end 298 of the gear unit 294. As best seen in FIG. 16 , the gear 250 can include three annular recesses 306 disposed radially around the upper channel 304. However, in other cases, the gear 250 can include any number of recesses 306, which can be arranged in any suitable configuration. Alternatively, in some cases, the recesses 306 can be omitted.

[0058] 17 and 18 , the channel 300 can receive the post 246 and the one-way clutch 248. The gear unit 294, post 246, and one-way clutch 248 can be arranged such that the lower channel 302 receives a portion of the first segment 264 of the post 246, and the upper channel 304 receives the one-way clutch 248 (in addition to the portion of the first segment 264 encased by the one-way clutch 248). That is, the one-way clutch 248 and gear unit 294 can be configured to translate movement or rotation of the one-way clutch 248 into a responsive movement or rotation of the gear unit 294. The one-way clutch 248 can be pressed into the upper channel 304 to provide a press fit between it and the gear unit 294 (e.g., the one-way clutch 248 can be pressed into the gear 250 and a portion of the neck portion 292). The press fit can allow the one-way clutch 248 and the gear unit 294 to move or rotate as a unit. In the case where clutch 248 inhibits counterclockwise rotation, gear unit 294 may also be prevented from rotating in the counterclockwise direction.

[0059] 19 , the actuator 254 may be provided in the form of a base member 308, a hook 310, and an arm 312. The hook 310 may be integrally formed with the base member 308 or may be coupled to and extend outwardly therefrom. The hook 310 may include a shank 314 connected to the base member 308, a point 316, and a bend 318 extending between the shank 314 and the point 316. The bend 318 may be oriented substantially perpendicular to each of the shank 314 and the point 316, and the point 316 may extend from the bend 318 back toward the base member 308 (e.g., the point 316 may be substantially parallel to the shank 314). That is, a gap 320 may be formed between the shank 314 and the point 316. The gap 320 may be configured to capture, for example, a hook-like object or piece of material.

[0060] The arm 312 may be integrally formed with the base member 308 or may be coupled to and extend upwardly therefrom. The base member 308 and the hook 310 may be substantially coplanar. The arm 312 may include an extension portion 322 extending upwardly from the base member 308 in a direction substantially perpendicular to the plane occupied by the base member 308 and the hook 310. The arm 312 may include a trigger 324 positioned for engagement by one or more components of the printer 100 (e.g., the carriage 138). The trigger 324 may be integrally formed with the extension portion 322 or may be coupled to and extend upwardly therefrom. In some cases, the arm 312 may include a connector 326 positioned between and connecting the extension portion 322 and the trigger 324. As shown in FIG. 19 , the connector 326 is provided in the form of a straight portion extending at an angle between the extension portion 322 and the trigger 324. In other cases, connector 326 can be omitted and trigger 324 can be connected directly to extension 322. In still other cases, arm 312 can be provided as a single component whose upper end can perform the function of trigger 324, or actuator 254 can be provided in any other suitable form. The dimensions and height of actuator 254 can be adjusted based on the size of printer 100 and the exact location of the engagement point between actuator 254 and printer 100.

[0061] As best shown in FIG. 20 , the socket 328 can define an opening in the base member 308, and the socket 328 can be configured to receive the notched portion 270 of the post 246. In some cases, the socket 328 can define a passageway extending through the base member 308 in a direction substantially perpendicular to the plane occupied by the base member 308 and the hook 310. The socket 328 can be given a shape that is a substantial mirror image of the shape of the notched portion 270 of the post 246. As shown in FIG. 19 , the socket can be given a substantially D-shaped shape. The curved portion 330 of the socket 328 can correspond to the generally cylindrical shape of the cylindrical portion 268 of the second segment 266, and the straight portion 332 of the socket 328 can correspond to the area of ​​the notched portion 270 that is “skimmed” compared to the cylindrical portion 268. However, in other cases, the socket 328 can be given any suitable shape or configuration, so long as it is configured to receive the notched portion 270 of the post 246. That is, notched portion 270 can be inserted into socket 328 (e.g., creating a press fit between actuator 254 and post 246), thereby inhibiting or otherwise limiting rotational movement of actuator 254 relative to post 246. In other words, this engagement between socket 328 and notched portion 270 can cause post 246 to rotate in response to any rotation of actuator 254. In other cases, engagement between post 246 and actuator 254 can be achieved by any other means known in the art (e.g., by providing complementary keyed features on each of post 246 and actuator 254 and fastening post 246 and actuator 254 together, etc.).

[0062] The actuator 254 can be provided in the form of a rigid material capable of accommodating a press fit. In some cases, the actuator 254 can be provided in the form of polyetherimide (PEI). In other cases, the actuator 254 can be provided in the form of polycarbonate / acrylonitrile butadiene styrene (PC-ABS) or any other suitable material.

[0063] As best shown in FIG. 21 , in some cases, the base member 308 can include a first elongated groove 334, and the arm 312 can include a second elongated groove 336. The first elongated groove 334 can be positioned on a bottom 338 of the base member 308. The first elongated groove can extend at least partially between the socket 328 and a distal end 340 of the base member 308. The second elongated groove can extend between the bottom 338 of the base member 308 and a tip 342 of the arm 312. The second elongated groove can extend linearly along each of the extension portion 322, the connector 326, and the trigger 324. In other cases, the first and second elongated grooves 334, 336 can be provided in any other suitable arrangement or can be omitted.

[0064] 22 , the actuator assembly 206 can be positioned adjacent to the tray 210 such that the gear 250 can align with and engage the first plurality of teeth 221. Thus, rotation of the gear 250 translates into rotation of the tray 210. As described above, due to the press fit between the one-way clutch 248 and the upper channel 304 of the gear unit 294, rotation of the gear 250 can be coordinated with (e.g., achieved by) rotation of the post 246. Furthermore, due to the engagement between the socket 328 and the notched portion 270 of the post 246, rotation of the post 246 can be coordinated with (e.g., achieved by) rotation of the actuator 254. Thus, the actuator assembly 206 can be configured such that rotation of the actuator 254 can ultimately drive rotation of the tray 210. In other cases, the maintenance carousel 200 can drive rotation of the tray by other means known in the art (e.g., by a moving belt, a friction wheel, a motor, etc.).

[0065] When the maintenance carousel 200 is installed in a printer (e.g., the printer 100 of FIGS. 1-3 or any other suitable printing device), the maintenance carousel 200 may be positioned substantially below the printer's operating components (e.g., the carriage 138, the printhead 140, and the gantry 144). However, the maintenance carousel 200 may be positioned and configured such that at least the trigger 324 of the actuator 254 can extend upward to interrupt the path of motion of one or more components of the printer. In this manner, the actuator 254 may be positioned to be struck by one or more components of the printer during use (e.g., the carriage 138 may strike the actuator 254 at the far end of its path of motion along the gantry 144). Such a strike may apply a force to the actuator 254 that may tend to move the actuator 254 in the direction of arrow 344 in FIG. 22 . However, the actuator 254 may be prevented from causing this translation due to its connection to the rest of the actuator assembly 206 and / or its location within the maintenance carousel 200. Thus, a force applied to the actuator 254 may cause a rotation rather than a translation, thereby driving the rotation of the post 246, the gear unit 294, and ultimately the rotation of the tray 210.

[0066] 23 and 24 , the shroud 202 may include a platform 346 configured to receive and support each of the actuator assembly 206 and the tray 210. The platform 346 may be substantially circular or teardrop-shaped in shape and may include an upwardly extending outer wall 348. The outer wall 348 may be given a shape that substantially mirrors the shape of the side wall 214 of the tray 210. The shroud 202 may include a protruding region 350 that may disrupt or distort the generally circular shape of the platform 346 and the outer wall 348 in an area adjacent to the protruding region 350. In some cases, the protruding region 350 may be positioned and configured to receive the actuator assembly 206 when the maintenance carousel 200 is fully assembled.

[0067] The shroud 202 may include one or more mounting tabs 352 circumscribing and extending outwardly from the outer wall 348. The mounting tabs 352 include through-holes designed to receive screws or other fastening mechanisms. The mounting tabs 352 may be configured to facilitate connection or coupling between the maintenance carousel 200 and a printer (e.g., the printer 100 or any other suitable printing device). As shown in FIG. 23 , the shroud 202 may include three mounting tabs 352 arranged radially around the outer wall 348. However, in other cases, the shroud 202 may include any number of mounting tabs 352 arranged in any suitable configuration.

[0068] The shroud 202 may include one or more connection tabs 354 positioned along and extending outwardly from the outer wall 348. The connection tabs 354 may be configured to facilitate a connection or coupling between the shroud 202 and the shroud cover 204 when the maintenance carousel 200 is fully assembled. In some embodiments, the shroud 202 may include two connection tabs 354 positioned opposite each other along the outer wall 348. However, in other cases, the shroud 202 may include any number of mounting tabs 352 arranged in any suitable configuration.

[0069] The shroud 202 may further include one or more receiving members 356 positioned along and projecting outwardly from the outer wall 348. Similar to the connection tabs 354, the receiving members 356 may be configured to facilitate a connection or coupling between the shroud 202 and the shroud cover 204 when the maintenance carousel 200 is fully assembled. Additionally, the receiving members 356 may help ensure that the shroud 202 and the shroud cover 204 are properly oriented when joined. In some cases, the shroud 202 may include two receiving members 356 positioned opposite each other along the outer wall 348. However, in other cases, the shroud 202 may include any number of receiving members 356 arranged in any suitable configuration.

[0070] 23 and 24 , the shroud 202 may include one or more bent tabs 358 formed in the platform 346. The bent tabs 358 may be configured to apply friction to the tray 210 (e.g., to slow or partially prevent rotation of the tray 210 relative to the shroud 202). In some cases, the shroud 202 may include three bent tabs 358 positioned proximate the outer wall 348, oriented in a similar manner relative to each other, and radially spaced apart from each other. However, in other cases, the shroud 202 may include any number of bent tabs 358 arranged in any suitable configuration. The shroud 202 and the tray 210 may be configured such that the coefficient of friction between the shroud 202 and the tray 210 is between about 0.2 and about 0.5 when the maintenance carousel 200 is in use.

[0071] The shroud 202 may also include one or more elongated fins 360 positioned along and projecting inwardly from the outer wall 348. The fins 360 may be configured to provide support to or prevent inadvertent movement of the tray 210 when the maintenance carousel 200 is in use. The fins 360 may surround and contact the side wall 214 of the tray 210 when the tray 210 and shroud 202 are engaged with one another. The fins 360 may be integrally formed with the outer wall 348 or may be coupled to and extend inwardly therefrom. Additionally or alternatively, the fins 360 may be integrally formed with the platform 346 or may be coupled to and extend upwardly therefrom. As shown in FIG. 23 , the shroud 202 may include a total of 15 fins 360, including three groups of five fins 360, each disposed between two adjacent bent tabs 358. However, in other cases, the shroud 202 may include any number of fins 360 arranged in any suitable configuration.

[0072] The platform 346 may support an actuator assembly well 362 and a center post 364. When the maintenance carousel 200 is assembled, the actuator assembly well 362 may be configured to support the actuator assembly 206, and the center post 364 may be configured to support the tray 210 (e.g., the center post 364 may be positioned to align with and be received by the receiving post 226). The actuator assembly well 362 may be disposed in the protruding region 350 and may be positioned proximate to the outer wall 348. In some cases, one or more connector walls 366 may extend between the actuator assembly well 362 and the outer wall 348, thereby connecting the actuator assembly well 362 and the outer wall 348 and providing additional structural stability to the actuator assembly well 362. The shroud 202 may include two connector walls 366 extending between the actuator assembly well 362 and the outer wall 348. In other cases, the shroud 202 can include any number of connector walls 366 or can exclude connector walls 366. In cases where the connector walls 366 are excluded, the actuator assembly well 362 can be integrally formed with the platform 346 or can be coupled to the platform 346 and extend upwardly therefrom.

[0073] The central post 364 may be positioned at a central location on the platform 346 and may be disposed substantially equidistant from each point along the outer wall 348. However, the central post 364 may be disposed at a distance that is greater than the distance between a point along the portion of the outer wall 348 that is in the protruding region 350 compared to the distance between the central post 364 and a point along the remainder of the outer wall 348. The central post 364 may be configured such that when received by the receiving posts 226 of the tray 210, the tray 210 is supported against rotation about the central post 364 within the shroud 202.

[0074] As best shown in FIG. 25 , the actuator assembly well 362 can include a shaft 368 defining a passageway 370 therethrough. The shaft 368 can be substantially cylindrical or substantially frusto-conical in shape. The actuator assembly well 362 can include a ledge 372 that can divide the passageway 370 into a lower chamber 374 and an upper chamber 376. The lower chamber 374 can be configured to receive the post 246 of the actuator assembly 206, and the upper chamber 376 can be configured to receive at least a portion of the body portion 290 of the gear unit 294. The lower chamber 374 can be smaller than the upper chamber 376. The lower chamber 374 can be provided in the form of a cylindrical opening that can have dimensions that mirror or substantially equal to the dimensions of the post 246. The upper chamber 376 can be provided in the form of a cylindrical opening that can have dimensions that mirror or substantially equal to the dimensions of the body portion 290. In other cases, the shaft 368, the lower chamber 374, and the upper chamber 376 can be given any suitable shape or configuration, so long as the lower chamber 374 and the upper chamber 376 are configured to receive the post 246 and the body portion 290, respectively.

[0075] As best shown in FIG. 26 , each bent tab 358 can be substantially linear in shape and can include a first integral end 378 and a second break-off end 380. Each bent tab 358 can include a plank 382 extending outward from the first integral end 378 and terminating at the second break-off end 380. The plank 382 further includes a ridge 384 disposed thereon at the second break-off end 380 and extending upwardly therefrom. The ridge 384 can be integrally formed with the plank 382 or can be coupled to the plank 382 and extending upwardly therefrom. The bent tab 358 can further include a trench 386 at least partially surrounding the plank 382. The trench 386 can be provided in the form of a linear channel surrounding at least a portion of the plank 382. As shown in FIG. 26 , the trench 386 can surround the plank 382 on three sides, but may not extend along the first end 378. The trench 386 can allow the plank 382 to flex either upward or downward relative to the platform 346 of the shroud 202. The ridges 384 can be configured to contact the base 212 of the tray 210 when the tray 210 is positioned within the shroud 202 (see FIG. 27 ). In this manner, the flex tabs 358 can apply friction to the base 212 through the ridges 384 when the tray 210 rotates relative to the shroud 202.

[0076] 27 and 28, the center post 364 may be enclosed within the receiving post 226 when the tray 210 is positioned within the shroud 202. The center post 364 and the receiving post 226 may each be substantially cylindrical, conical, or frusto-conical in shape, although in other cases the center post 364 and the receiving post 226 may be given any suitable shape or configuration so long as the receiving post 226 is configured to receive the center post 364. The absorbent pad 234 may rest on the tray support structure 222 such that the tray support structure 222 is positioned between the base 212 of the tray 210 and the absorbent pad 234.

[0077] 29 , the shroud cover 204 may be provided with a shape that is a mirror image of or substantially the same as the shape of the shroud 202. For example, the shroud cover 204 may be substantially circular in shape except that it may include a protruding region 388 that corresponds to the protruding region 350 of the shroud 202. The shroud cover 204 may include a body 390 and a circumscribing rim 392. One or more latches 394 and one or more pin members 396 may be positioned around the rim 392. As shown in FIG. 29 , the shroud cover 204 may include two latches 394 positioned at opposite locations along the rim 392 and two pin members 396 positioned at opposite locations along the rim 392. The positions of the latches 394 and pin members 396 along the periphery 392 may correspond to and align with the positions of the connection tabs 354 and receiving members 356, respectively, along the outer wall 348 of the shroud 202. Thus, the latches 394 and pin members 396 may facilitate releasable attachment between the shroud 202 and the shroud cover 204. In other cases, the shroud cover 204 may include any number of latches 394 and pin members 396, and the latches 394 and pin members 396 may include any suitable arrangement, so long as the connection tabs 354 and receiving members 356 are positioned to receive the latches 394 and pin members 396, respectively.

[0078] 30 , the shroud cover 204 may include a rim 398 positioned along a perimeter 392. The rim 398 may be integrally formed with the body 390 of the shroud cover 204, or may be coupled to the body 390 along the perimeter 392 and extend downwardly therefrom. In some cases, one or more gaps 400 may be disposed along the perimeter 392, and the rim 398 may only partially surround the body 390 such that the rim 398 may be discontinuous at points where the gaps 400 may interrupt the rim 398.

[0079] The main body 390 of the shroud cover 204 further includes a housing 402 having a ceiling 404 through which one or more openings 208 extend. As shown in FIG. 30 , two linear openings 208 may extend entirely through the ceiling 404. The openings 208 may provide one or more windows that allow waste ink to enter the maintenance carousel 200. The maintenance carousel 200 may be positioned within an inkjet printer (e.g., printer 100) such that the openings 208 align with a maintenance position for a printhead (e.g., printhead 160) positioned at the distal end of the printhead's path of motion (e.g., along the gantry 144). Thus, when the printhead reaches the maintenance position, the printhead may expel waste ink through the openings 208, allowing the waste ink to be collected by the maintenance carousel 200 (e.g., in a tray 210).

[0080] As can be seen in FIG. 31 , the shroud cover 204 may further include a shroud support structure 406 disposed on a lower surface 408 thereof. The shroud support structure 406 may add stability and / or structural rigidity to the shroud cover 204 and / or the maintenance carousel 200 as a whole. The shroud support structure 406 may be provided in substantially the same form as the tray support structure 222. The shroud support structure 406 may be provided in the form of a plurality of wall members 410 arranged in a grid pattern across at least a portion of the lower surface 408 of the body 390. A circular sidewall 412 extends downwardly from the lower surface 408 of the body 390. The sidewall 412 may provide further stability and / or structural rigidity to the shroud cover 204.

[0081] An opening 414 can be formed in the body 390 adjacent the protruding region 388. The opening 414 can extend linearly through and downwardly from a substantially cylindrical collar 416 connected to the lower surface 408 of the body 390. The opening 414 can be configured to allow at least a portion of the actuator assembly 206 to emerge above the shroud cover 204 when the maintenance carousel is assembled. In some aspects, the opening 414 and collar 416 can be positioned to align with the actuator assembly well 362 and can be configured to receive the cylindrical portion 268 of the second segment 266 of the post 246. Thus, when the maintenance carousel 200 is assembled, the notched portion 270 of the second segment 266, which can nest within the socket 328 (e.g., engage with the base member 308 of the actuator 254 via a press fit), and the actuator 254 can be positioned above the body 390 of the shroud cover 204 (see FIG. 35 ).

[0082] The shroud 202 and the shroud cover 204 may each be formed from a plastic material, including polypropylene, nylon, polycarbonate / acrylonitrile butadiene styrene (PC-ABS), polyoxymethylene (POM), combinations thereof, or any other suitable material. In some cases, the shroud 202 and the shroud cover 204 may be formed from a metal or ceramic material. The material of the shroud 202 may be selected to enable the bent tabs 358 to generate a desired drag force against the tray 210 (e.g., apply a desired level of friction to the tray 210). Furthermore, the shroud 202 may be configured such that the center support 364 can apply a light or small amount of friction to the tray 210 through the receiving posts 226.

[0083] Attachment between the shroud 202 and the shroud cover 204 may be facilitated by the connection tabs 354, receiving members 356, latches 394, and pin members 396, although it will be appreciated by those skilled in the art that the shroud cover 204 may be attached to the shroud 202 by any one or more other suitable mechanisms when the maintenance carousel 200 is assembled.

[0084] As best shown in FIG. 32 , each connection tab 354 extending outward from the shroud 202 may include a first end 418, a second end 420, and a substantially vertical face 422 extending therebetween. The face 422 may be flanked on either side by two retaining walls 424. The retaining walls 424 may be oriented substantially perpendicular to the face 422 and may project outward from the outer wall 348 so as to extend beyond the face 422. A ledge 426 may be located on the second end 420 of the connection tab 354 below the face 422. The ledge 426 may be oriented substantially perpendicular to the face 422 and may extend between the face 422 and the outer wall 348.

[0085] As best shown in FIG. 33 , each receiving member 356 may be provided in the form of a protrusion 428 extending outward from the outer wall 348 of the shroud 202. The protrusion 428 may have a receptacle 430 formed therein. In some cases, the protrusion 428 may be substantially semicircular in shape, and the receptacle 430 may be substantially cylindrical in shape. In other cases, the receiving member 356 may be provided in any suitable form, so long as the receiving member 356 is positioned and configured to receive the pin member 396 of the shroud cover 204.

[0086] As best shown in FIGS. 34 and 35 , each latch 394 may include a panel 432 and a latch member 434 connected to the panel 432 at its distal end 436. A proximal end 438 of the panel 432 may be connected to and extend downwardly from either or both of the body 390 and the rim 398 of the shroud cover 204. The latch member 434 may project inward from the distal end 436 of the panel 432 (e.g., toward the body 390). The panel 432 of the latch 394 and the surface 422 of the connection tab 354 may be provided in the form of a mating surface. When the shroud cover 204 is coupled to the shroud 202, the latch 394 may be received by the connection tab 354 such that the panel can rest flush against the surface 422. In this position, the latch 394 may be sandwiched on either side by the retaining walls 424 of the connection tab 354. Thus, lateral movement of the latch 394 relative to the connection tab 354 can be prevented. Similarly, the latch member 434 can extend beneath the connection tab 354 and engage the underside 408 of the connection tab 354. The engagement between the latch member 434 and the connection tab 354 can prevent the shroud cover 204 from being unintentionally lifted off the shroud 202.

[0087] 34 , each pin member 396 may include a protrusion 440 extending outward from the body 390 of the shroud cover 204. A pin 442 may be formed integrally with the protrusion 440, or the pin 442 may be coupled to the protrusion 440 and extend downwardly therefrom. The structure of the pin member 396 may complement the structure of the receiving member 356. In some cases, the protrusion 440 may be substantially semicircular in shape (e.g., a mirror image of the shape of the protrusion 428 of the receiving member 356), and the pin 442 may be provided in the form of a cylindrical peg configured to align with and be received by a receptacle 430 of the receiving member 356. In some cases, the pin 442 may fit (e.g., by a press fit) into the receptacle 430, thereby limiting both vertical and lateral movement of the shroud cover 204 relative to the shroud 202. In other cases, the pin 442 may simply fit within the receptacle 430 , thereby restricting only lateral movement of the shroud cover 204 relative to the shroud 202 .

[0088] As best shown in FIG. 35 , when the maintenance carousel 200 is assembled, the pin member 396 can be aligned with and received by the receiving member 356, and the latch 394 can be aligned with and engage the connecting tab 354. The protruding region 388 of the shroud cover can be aligned with the protruding region 350 of the shroud 202, thereby positioning the opening 414 over the actuator assembly well 362. That is, the opening 414 can be positioned to allow at least a portion of the actuator assembly 206 to pass therethrough. The notched portion 270 of the post 246 can extend through the opening 414, and the actuator 254 can press onto the post 246 through the socket 328 so that the bottom 338 of the base member 308 can rest against the body 390 of the shroud cover 204.

[0089] The stopper 444 and anchor 446 can be positioned on the shroud cover 204 proximate the opening 414 and can be arranged to engage the actuator 254 when the maintenance carousel 200 is in use. In some cases, the stopper 444 can be provided in the form of a T-shaped protrusion extending upwardly from the body 390 of the shroud cover 204. The stopper 444 can be configured to abut at least a portion of the base member 308 when the actuator 254 is in the rest position (depicted in FIGS. 35 and 36 ).

[0090] The stopper 444 can be positioned to engage the base member 308 of the actuator 254, while the anchor 446 can be positioned to engage the hook 310. The anchor 446 can be provided in the form of an angled member that extends upward from the body 390 of the shroud cover 204 and away from the actuator 254. The anchor 446 can be positioned proximate the protruding region 388. However, the anchor 446 can be positioned at a distance from the actuator 254 such that the spring 448 can extend between the actuator 254 and the anchor 446. As best shown in FIG. 36 , a first end 450 of the spring 448 can connect or engage with the hook 310 of the actuator 254, and a second end 452 of the spring 448 can connect or engage with the anchor 446.

[0091] In this manner, spring 448 can apply a "return" force to actuator 254. When maintenance carousel 200 is in use, a force can be applied to actuator 254 to rotate hook 310 away from anchor 446 (e.g., in the direction shown by arrow 344). This can cause the built-up tension on spring 448 to apply a return force to actuator 254 that opposes rotation in the direction of arrow 344, tending to return actuator 254 to its rest position. Stop 444 can limit the ability of spring 448 to cause rotation of actuator 254 (e.g., by preventing spring 448 from pulling actuator 254 beyond its rest position).

[0092] As best shown in Figure 37, the maintenance carousel 200 can be configured to allow a carriage 490 to engage the actuator 254 when the printer device is in use. The carriage 490 in Figure 37 can correspond to the carriage 138 of the printer 100 (see Figure 3), or any other component or part of a printing device configured to facilitate translational movement of one or more printheads across a printable medium. The carriage 490 can be slidably supported by a chassis 492 and configured to move across the chassis 492 along a path parallel to arrow 494 in Figure 37.

[0093] As described above with reference to FIG. 30 , a service position for one or more printheads (not shown) supported by carriage 490 can correspond to an outermost position of carriage 490 along chassis 492. When carriage 490 reaches or contacts wall stop 496 located at first end 498 of chassis 492, further translational movement of carriage 490 can be prevented. When carriage 490 reaches wall stop 496, one or more printheads supported by carriage 490 can occupy a service position (e.g., positioned to align with one or more openings 208 not shown in FIG. 37 and eject waste ink into maintenance carousel 200).

[0094] At the same time, when the carriage 490 reaches the wall stop 496, a bumper 500 disposed on the carriage 490 can impact the actuator 254 and engage the actuator assembly 206. As shown in FIG. 37 , the bumper 500 is provided in the form of a portion or area of ​​the carriage 490 that is positioned to impact or engage the actuator 254 when the chassis 492 approaches the first end 498. However, in other cases, the bumper 500 can be provided in any other suitable form (e.g., as a separate component coupled to the carriage 490) so long as the bumper 500 is configured to engage the actuator 254 when one or more printheads reach a maintenance position. The bumper 500 can impact the trigger 324 of the actuator 254 and rotate the actuator 254 in the direction of arrow 502 in FIG. 37 (e.g., a first rotational direction).

[0095] Rotation of the actuator 254 in a first direction can move the hook 310 away from the anchor 446 (see FIG. 35 ), thereby increasing the tension of the spring 448. The spring 448 can be positioned to rotate the actuator 254 in a direction opposite to the direction of the arrow 502 (e.g., a second rotational direction). This can cause the spring 448 to apply a return force to the actuator 254. As the carriage 490 moves along the chassis 492 away from the actuator 254, the return force (e.g., applied by the spring 448 to the hook 310) can rotate the actuator 254 back to its rest position. This return rotation can end when the stop 444 contacts the base member 308 of the actuator 254, thereby opposing the return force of the spring 448. As described above with reference to FIG. 19 , rotation of the actuator 254 can drive a responsive rotation of the post 246 via engagement between the notched portion 270 and the socket 328. Rotation of post 246, in turn, can drive rotation of one-way clutch 248 and gear unit 294. However, one-way clutch 248 can be configured to allow rotation of gear unit 294 in a first rotational direction of actuator 254, but inhibit rotation of gear unit 294 in a second rotational direction of actuator 254 (e.g., during actuator 254's return to a rest position).

[0096] While the maintenance carousel 200 is in use with a printer, the printer can repeatedly engage the maintenance carousel 200 (e.g., through the buffer 500) whenever it becomes desirable for one or more printheads to expel waste ink to maintain print quality. Each such engagement can initiate an indexing sequence involving (1) a first stage in which the rotation of the actuator 254 in a first direction is driven by a printer carriage or other component (e.g., the buffer 500) that moves laterally relative to the print medium during printing, (2) a second stage in which one or more printheads (e.g., the printheads 140) expel waste ink into the maintenance carousel 200 through one or more openings 208, and (3) a third stage in which the spring 448 drives the rotation of the actuator 254 in a second direction until the actuator 254 returns to its rest position. 37, the indexing sequence can begin when the carriage 490 approaches the first end 498 of the chassis 492 and the bumper 500 impacts the actuator 254. The indexing sequence can end when the base member 308 returns to contact the stopper 444 (see FIG. 35). However, due to the unidirectional action of the clutch 248, the first stage of the indexing sequence can result in the gear 250 driving the rotation (e.g., indexing) of the tray 210, while the tray 210 can remain stationary while the actuator 254 returns to the rest position during the third stage.

[0097] In this manner, the gear 250 can cause indexing (e.g., incremental rotational movement) of the tray 210 each time waste ink is deposited. This indexing can change the waste ink collection point within the tray 210 (e.g., the point at which waste ink is deposited along the absorbent pad 234). Indexing the tray 210 causes the waste ink to accumulate in a circular pattern, which can reduce the likelihood of waste ink accumulating in substantially vertical formations (e.g., stalagmites) that could lead to printer malfunction or shorten the lifespan of the printer. Additionally, in some cases, this can eliminate the need for users to replace the absorbent pad 234 or any other component of the maintenance carousel 200, thereby leading to increased convenience and lower costs for consumers.

[0098] Indexing of the tray 210 can be aided by the bent tabs 358, which can apply friction to the tray 210 via the ridges 384 described above with reference to FIG. 26. The friction applied by the bent tabs 358 can oppose rotation of the tray 210 in response to rotation of the gear 250. In the absence of this friction, the primary force opposing rotation of the tray 210 would be a minimal amount of friction between the shroud's center post 364 and the receiving posts 226 of the tray 210. With little or no counter force, rotation of the tray 210 would directly cooperate with rotation of the gear 250, thereby eliminating or reducing indexing functionality.

[0099] In some cases, the maintenance carousel 200 may be configured to rotate the trays 210 one complete revolution approximately every 60 print jobs. In other cases, the maintenance carousel 200 may be configured to provide any other desired rotational speed of the trays 210.

[0100] 38-44, another embodiment 600 of the maintenance carousel is shown, which may be provided in substantially the same form as the maintenance carousel 200, except that the maintenance carousel 600 may include two electrostatic plates 601 a, 601 b configured to generate an electromagnetic field that can assist in collecting waste ink. In describing the maintenance carousel 600, like names and like reference numbers are used to indicate parts similar to those related to the maintenance carousel 200 (i.e., components labeled with like or identical names and reference numbers differing by exactly 400 in the maintenance carousel 600 and the maintenance carousel 200 may be substantially similar in both form and function).

[0101] As best shown in FIG. 38 , the maintenance carousel 600 can include a shroud 602 and a shroud cover 604 provided in a configuration substantially similar to the shroud 202 and shroud cover 204 of the maintenance carousel 200. The shroud cover 604 can include one or more latches 794 and one or more pin members 796 disposed about a periphery 792 of the shroud cover 604 and extending downwardly therefrom. The shroud 602 can include one or more connection tabs 754 and one or more receiving members 756 disposed about an outer wall thereof and extending outwardly therefrom. As described above with reference to FIGS. 32-34 , the latches 794 and pin members 796 can be positioned to align with and be received by the connection tabs 754 and receiving members 756, respectively, to facilitate coupling between the shroud 602 and the shroud cover 604.

[0102] Similarly, protruding region 788 of shroud cover 604 may correspond to protruding region 750 of shroud 602 when shroud 602 and shroud cover 604 are properly aligned and coupled together. Shroud 602 may further include one or more mounting tabs 752 positioned along and extending outwardly from outer wall 748. Mounting tabs 752 may be configured to facilitate connection or coupling between maintenance carousel 600 and a printer (e.g., printer 100 or any other suitable printing device).

[0103] The actuator 654 can be positioned on the shroud cover 604 proximate the protruding region 788. The actuator 654 can be coupled to a post 646 that extends upwardly through the shroud cover 604 and can be received by the socket 728 of the actuator 654. A stopper 844 can be positioned on the shroud cover 604 and can abut the actuator 654 when the actuator 654 is in the rest position (shown in FIG. 38 ). An anchor 846 can protrude upwardly from the shroud cover 604 and can be positioned opposite the stopper 844 with respect to the actuator 654. A spring 848 extending between the anchor 846 and the hook 710 of the actuator 654 can apply a restoring force to the actuator 654 when the actuator 654 rotates away from the anchor 846.

[0104] A housing 802 positioned adjacent the actuator assembly 606 and extending upward from the main body 790 of the shroud cover 604 may have a ceiling 804 including one or more openings 608 extending therethrough. The openings 608 may allow waste ink to enter the enclosure formed by the shroud 602 and shroud cover 604 when the maintenance carousel 600 is in use. As shown in FIG. 38 , two linear openings 608 are provided on the ceiling 804. However, in other cases, any number of openings 608 may be arranged in any suitable configuration, so long as the openings 608 are positioned to allow one or more printheads of the printer (e.g., printhead 140 of printer 100) to deposit waste ink onto the maintenance carousel 600.

[0105] 39 , a tray 610 configured to collect waste ink can be disposed within an enclosure formed by a shroud 602 and a shroud cover 604. The tray 610 can include a substantially circular base 612, a substantially annular lip 616, and a substantially cylindrical sidewall 614 extending therebetween. The base 612 can be surrounded by a lower periphery 618 of the sidewall 614, and the lip 616 can extend outwardly from an upper periphery 620 of the sidewall 614. A receiving post 626 having a cavity 628 defined by and extending through a sidewall 627 of the receiving post 626 can be centrally located on the base 612 with respect to the sidewall 614. In some cases, a tray support structure 622 including a plurality of wall members 624 can be disposed on the base 612 and can extend upwardly therefrom. The tray 610 may include one or more fins 630 disposed about a lower periphery 618 of the sidewall 614 and extending inwardly therefrom (e.g., toward the receiving posts 626). A third plurality of tines 621 may surround an upper periphery 620 of the sidewall 614 and extend outwardly therefrom. The third plurality of tines 621 may be disposed below and / or adjacent to the lip 616 and may be evenly radially spaced apart from one another about the upper periphery 620.

[0106] 40 , the absorbent pad 634 can be disposed within the tray 610. The absorbent pad 634 can be substantially annular in shape and can be defined by an outer diameter 636 and an inner diameter 638. The outer diameter 636 corresponds to the lower perimeter 618 of the sidewall 614 and can be substantially the same dimension as the lower perimeter 618. The inner diameter 638 can define a central opening 640 that corresponds to the receiving post 626 and is configured to receive the receiving post 626 when the absorbent pad 634 is positioned within the tray 610. In some cases, the absorbent pad 634 can rest on the tray support structure 622. One or more slots 642 corresponding to the one or more fins 630 of the tray 610 can be disposed around the perimeter 636 of the absorbent pad 634 and can extend entirely through the absorbent pad 634. The slots 642 may be evenly radially spaced from one another along the outer diameter 636, and each slot 642 may be configured to align with and receive one fin 630 when the absorbent pad 634 is positioned within the tray 610. That is, engagement between the fins 630 and the slots 642 may prevent or resist rotation of the absorbent pad 634 relative to the tray 610.

[0107] Actuator assembly 606, provided in substantially the same configuration as actuator assembly 206, may include a post 646, a gear unit 694 including a gear 650 positioned along the post 646, a one-way clutch 648 positioned between the gear 650 and the post 646, and an actuator 654 positioned on the post 646. The post 646, the one-way clutch 648, and the gear unit 694 may be configured to rotate together as a single unit in response to rotation of the actuator 654. The actuator 654 may be fixedly coupled to or mounted to the post 646 through a socket 728 and may extend upwardly therefrom. A trigger 724 may be positioned on the actuator 654 and configured to convert a linear force applied thereto into a rotational force applied to the actuator 654 and transmitted to the remaining components of the actuator assembly 606. The gear 650 may include a fourth plurality of teeth 656. The actuator assembly 606 can be positioned adjacent to the tray 610 such that the fourth plurality of tines 656 can align with and engage the third plurality of tines 621. That is, the actuator assembly 606 can perform indexing of the tray 610 in a manner substantially similar to that described above with reference to FIG.

[0108] 41 , the shroud 602 may include an actuator assembly well 762 and a central post 764 disposed on and extending upwardly from its platform 746. The actuator assembly well 762 may be disposed in a protruding region 750 adjacent to the outer wall 748. In some cases, one or more connector walls 766 may extend between the outer wall 748 and the actuator assembly well 762, thereby connecting the actuator assembly well 762 and the outer wall 748 and providing additional structural stability to the actuator assembly well 762. A passage 770 configured to receive at least a portion of the post 646 and at least a portion of the gear unit 694 may extend vertically through the actuator assembly well 762 such that the actuator assembly 606 may be installed within and supported by the actuator assembly well 762 when the maintenance carousel 600 is fully assembled. The center post 764 can be positioned to align with and be received by the receiving posts 626 of the tray 610 such that the tray 610 can be supported by the shroud 602 for rotation about the center post 764 .

[0109] The shroud 602 may include one or more flex tabs 758 formed in the platform 746. Each flex tab may include a ridge 784 positioned at an end thereof and may be at least partially surrounded by a moat 786 that may allow the flex tab 758 to flex upward or downward relative to the platform 746. In this manner, the flex tabs 758 may be configured to apply friction to the tray 610 as described above with reference to FIG. 26 when indexing is performed by the actuator assembly 606. Additionally, one or more fins 760 configured to prevent or reduce inadvertent movement of the tray 610 within the shroud 602 may be positioned along the outer wall 748 and extend inwardly therefrom (e.g., toward the center post 764).

[0110] One difference between the maintenance carousel 200 and the maintenance carousel 600 is that the shroud cover 604 of the maintenance carousel 600 may include two plate housings 603a, 603b configured to receive two electrostatic plates 601a, 601b, respectively. As best shown in FIG. 42, each of the plate housings 603a, 603b is defined by a straight sidewall that projects downwardly from the lower surface 808 of the shroud cover 604. The plate housings 603a and 603b may be oriented in a substantially parallel manner relative to one another.

[0111] 42 , a substantially cylindrical collar 816 defining an opening 814 extending therethrough may be disposed on the underside 808 of the shroud cover 604 adjacent the protruding region 788. The opening 814 may be positioned to align with the actuator assembly well 762 and receive at least a portion of the post 646 of the actuator assembly 606. Thus, at least a portion of the post 646 may extend through the opening 814 above the shroud cover 604 to support the actuator 654 when the maintenance carousel 600 is assembled (see FIG. 38 ).

[0112] As best shown in FIG. 43, the electrostatic plates 601a and 601b can be substantially identical. However, in other cases, the electrostatic plates 601a, 601b can be provided as distinct components of any suitable shape or structure. Each electrostatic plate 601 can be provided in the form of a metal or other conductive material (e.g., a conductive polymer, silicone, or any other suitable material) and can be provided in the form of a substantially linear panel defined by a bottom end 605 and an opposing top end 607. One or more contacts 609 can extend upward from either side of the top end 607. When the electrostatic plate 601 is to be at least partially or completely disposed within the plate housing 603, the bottom end 605 of the electrostatic plate 601 can be inserted into the plate housing 603 first such that the bottom end 605 is positioned adjacent to the absorbent pad 634 (see FIG. 44).

[0113] As best shown in FIG. 44 , the electrostatic plates 601 a, 601 b positioned within the plate housings 603 a, 603 b can extend downward into the enclosure formed by the shroud 602 and the shroud cover 604. The plate housings 603 a, 603 b can include inner walls 611 a, 611 b that define chambers within which the electrostatic plates 601 a, 601 b can fit. The plate housings 603 a, 603 b can further include one or more retaining members 613 coupled to and extending inwardly from the inner walls 611 a, 611 b. The retaining members 613 can be configured to support the electrostatic plates 601 a, 601 b against the walls to reduce or eliminate movement of the electrostatic plates 601 a, 601 b within the plate housings 603 a, 603 b.

[0114] Each of the electrostatic plates 601 a, 601 b can be electrically charged. In some cases, the electrostatic plates 601 a, 601 b can be in communication with a transformer (not shown) that can apply a voltage to them (e.g., through contacts 609). In this manner, one of the electrostatic plates 601 a, 601 b can be given a positive charge, and the other of the electrostatic plates 601 a, 601 b can be given a negative charge. That is, the electrostatic plates 601 a, 601 b can generate an electromagnetic field in and / or around the maintenance carousel 600. Either of the electrostatic plates 601 a, 601 b can be selected for a positive charge, and either of the electrostatic plates 601 a, 601 b can be selected for a negative charge. However, in order to generate an electromagnetic field, the electrostatic plates 601 a and 601 b must be given opposite charges.

[0115] In some cases, the electrostatic plates 601 a, 601 b and plate housings 603 a, 603 b can be provided with a substantially vertical orientation (e.g., substantially perpendicular to the base 612 of the tray 610). In other cases, the electrostatic plates 601 a, 601 b and plate housings 603 a, 603 b can be provided with a substantially horizontal orientation (e.g., substantially parallel to the base 612 of the tray 610). The orientation and / or position of the electrostatic plates 601 a, 601 b can be selected depending on the desired direction and / or strength of the electromagnetic field.

[0116] In some cases, electromagnetically charged waste ink can be emitted by the printhead (e.g., printhead 140) in the form of small droplets and / or aerosol particles that may have a tendency to become airborne or accumulate in areas other than the maintenance carousel 600. When the maintenance carousel 600 is in use, the electromagnetic fields described above can attract these smaller droplets and / or aerosol particles of waste ink to the electrostatic plates 601a, 601b. That is, the electrostatic plates 601a, 601b and the magnetic fields they generate can increase the effectiveness of the maintenance carousel 600 and / or improve the lifespan of the printer. For example, the electromagnetic fields can reduce the likelihood of waste ink droplets or particles accumulating on critical components of the printer, where they could cause damage or malfunction. If allowed to accumulate directly on the electrostatic plates 601a, 601b, the waste ink could disrupt the function of the maintenance carousel 600 (e.g., by causing a short circuit). Thus, in addition to properly positioning and orienting the electrostatic plates 601a, 601b (e.g., at a sufficient distance from the opening 608), the plate housings 603a, 603b can protect the electrostatic plates 601a, 601b from direct waste ink accumulation.

[0117] The maintenance carousel 600 can be positioned within and operably engaged by a printer (e.g., printer 100 or any other suitable printing device) in a manner substantially similar to the maintenance carousel 200 described above, particularly with reference to Figure 37. That is, the actuator assembly 606 can drive the indexing of the tray 610, thereby imparting a generally circular profile to the ink accumulation on the absorbent pad 634.

[0118] 45-54, another embodiment 1000 of a maintenance carousel is shown, which may be provided in substantially the same form as maintenance carousel 200, except that maintenance carousel 1000 may further include a fan assembly 1001 configured to generate an airflow therethrough and into a tunnel region 1003 thereof. In describing maintenance carousel 1000, like names and like reference numbers are used to indicate parts similar to those relating to maintenance carousel 200 (i.e., components labeled with like or identical names and reference numbers differing by exactly 800 in maintenance carousel 1000 and maintenance carousel 200 may be substantially similar in both form and function).

[0119] 45 and 46 , the maintenance carousel 1000 may include a shroud 1002 and a shroud cover 1004, which may be provided in a form substantially similar to the shroud 202 and shroud cover 204 of the maintenance carousel 200. However, the shroud 1002 and the shroud cover 1004 may include a tunnel region 1003, which may be configured to hold the fan assembly 1001 and / or other internal components of the maintenance carousel 1000. As best shown in FIG. 46 , the shroud 1002 may include a platform 1146 and an outer wall 1148 surrounding and extending upwardly therefrom. The shroud cover 1004 may include a periphery 1192 defining a body 1190, which may be given substantially the same shape as the shroud's platform 1146. That is, the shroud cover 1004 can be coupled to the shroud 1002 such that the protruding region 1188 of the shroud cover 1004 is aligned with the protruding region 1150 of the shroud 1002 and can support the actuator assembly 1006 in close proximity thereto.

[0120] The actuator 1054 can be disposed on the shroud cover 1004 proximate the protruding region 1188. The actuator 1054 can be coupled to a post 1046 that extends upwardly through the shroud cover 1004 and can be received by the socket 1128 of the actuator 654 (see FIG. 49 ). A stopper 1244 can be disposed on the shroud cover 1004 and can abut the actuator 1054 when the actuator 1054 is in the rest position (shown in FIGS. 45 and 46 ). An anchor 1246 can protrude upwardly from the shroud cover 1004 and can be positioned opposite the stopper 1244 with respect to the actuator 1054. A spring 1248 extending between the anchor 1246 and the hook 1110 of the actuator 1054 can apply a restoring force to the actuator 1054 when the actuator 1054 rotates away from the anchor 1246.

[0121] The tunnel region 1003 can be positioned on an opposite side of the actuator assembly 1006 with respect to the body 1190 and the platform 1146, and can include at least a portion of each of the shroud 1002 and the shroud cover 1004. The tunnel region 1003 can be provided in the form of a substantially straight, bent, or curved passageway extending outward from the outer wall 1148 and the body 1190 and in fluid communication with the remainder of the enclosure formed by the shroud 1002 and the shroud cover 1004. The tunnel region 1003 can begin at a proximal end 1005 connected to the outer wall 1148 and the body 1190, and can terminate at a distal end 1007 opposite the proximal end 1005. The tunnel region 1003 is provided in the form of two tunnel walls 1009, a ceiling 1011, and a base 1013 that extend from a proximal end 1005 to a distal end 1007 and define an air flow passage therebetween. The fan assembly 1001 can be located at or near the distal end 1007 of the tunnel region 1003 and can be configured to draw air (e.g., generate an air flow) into and / or through the tunnel region 1003. In some cases, the fan assembly 1001 can be provided in the form of a digital current (DC) brushless axial fan. However, in other cases, the fan assembly 1001 can be provided in the form of any suitable device configured to generate an air flow through the maintenance carousel 1000. Air driven by the fan assembly 1001 can exit the maintenance carousel 1000 through an outlet region 1015 located at the distal end 1007 of the tunnel region 1003.

[0122] A housing 1202 positioned adjacent the actuator assembly 1006 and extending upward from the body 1190 of the shroud cover 1004 may have a ceiling 1204 including one or more openings 1008 extending therethrough. The openings 1008 may allow waste ink to enter the enclosure formed by the shroud 1002 and shroud cover 1004 when the maintenance carousel 1000 is in use. As shown in FIGS. 45 and 46 , two linear openings 1008 are provided on the ceiling 1204. However, in other cases, any number of openings 1008 may be arranged in any suitable configuration, so long as the openings 1008 are positioned to allow one or more printheads of a printer (e.g., printhead 140 of printer 100) to deposit waste ink onto the maintenance carousel 1000. The opening 1008 may also provide one or more vents that allow the fan assembly 1001 to draw air into the maintenance carousel 1000 .

[0123] The shroud cover 1004 may include one or more latches 1194 and one or more pin members 1196 disposed about the periphery 1192. The latches 1194 and pin members 1196 may be positioned to align with and be received by one or more connection tabs 1154 and one or more receiving members 1156, respectively, disposed about the outer wall 1148 of the shroud 1002. Accordingly, the latches 1194, pin members 1196, connection tabs 1154, and receiving members 1156 may facilitate coupling between the shroud 1002 and the shroud cover 1004 as described above with reference to FIGS. 32-34. The shroud 1002 may further include one or more mounting tabs 1152 positioned along and extending outwardly from the outer wall 1148. The installation tabs 1152 may be configured to facilitate connection or coupling between the maintenance carousel 1000 and a printer (eg, printer 100 or any other suitable printing device).

[0124] Additionally, one or more fasteners 1017 positioned along the tunnel region 1003 can facilitate coupling between the shroud cover 1004 and the shroud 1002. The shroud 1002 can have one or more threaded members 1019 extending outwardly from one or both of the tunnel walls 1009, and the shroud cover 1004 can have one or more connecting members 1043 extending outwardly from the ceiling 1011 of the tunnel region 1003. The connecting members 1043 can be positioned to align with and / or abut the threaded members 1019 such that the fasteners 1017 can extend through the connecting members 1043 and into the threaded members 1019, thereby coupling the shroud cover 1004 to the shroud 1002.

[0125] 46 , an opening 1023 positioned to expose or provide access to a contact area 1025 of the fan assembly 1001 can be positioned on the ceiling 1011 of the tunnel region 1003. The opening 1023 can allow the fan assembly 1001 to be operatively engaged by a printer (e.g., printer 100) when the maintenance carousel 1000 is in use. One or more components of the printer (e.g., motors) can be electrically coupled to the fan assembly 1001 through the contact area 1025 to provide power thereto and / or drive its movement.

[0126] 47 , a tray 1010 configured to collect waste ink can be disposed within an enclosure formed by a shroud 1002 and a shroud cover 1004. The tray 1010 can include a substantially circular base 1012, a substantially annular lip 1016, and a substantially cylindrical sidewall 1014 extending therebetween. A lower perimeter 618 of the sidewall 1014 can surround the base 1012, and the lip 1016 can extend outwardly from an upper perimeter 1020 of the sidewall 1014. A receiving post 1026, through which a cavity 1028 extends, can be disposed on the base 1012 at a central location relative to the sidewall 1014. In some cases, a tray support structure 1022 including a plurality of wall members 1024 can be disposed on the base 1012 and can extend upwardly therefrom. A fifth plurality of teeth 1021 may surround and extend outwardly from an upper periphery 1020 of the sidewall 1014. A third plurality of teeth 1021 may be disposed below and adjacent to the lip 1016 and may be evenly radially spaced apart from one another around the upper periphery 1020.

[0127] Unlike the trays 210, 610, the tray 1010 may include a plurality of air flow windows 1045 formed in the sidewall 1014. The windows 1045 may be configured to allow air to flow from the openings 1008 to the tunnel region 1003 when the maintenance carousel 1000 is in use. As shown in FIG. 47 , the tray 1010 may include twelve windows 1045 arranged to be evenly radially spaced from one another along the sidewall 1014. However, in other cases, the tray 1010 may include any number of windows 1045 configured in any suitable arrangement, so long as the windows 1045 are configured to allow air to pass through the tunnel region 1003 when the tray 1010 rotates within the maintenance carousel 1000.

[0128] 48 and 49, an absorbent pad 1034 can be positioned within the tray 1010. The absorbent pad 1034 can be substantially annular in shape and can be defined by an outer diameter 1036 and an inner diameter 1038. The outer diameter 1036 corresponds to the lower perimeter 1018 of the sidewall 1014 and can be substantially the same dimension as the lower perimeter 1018. The inner diameter 1038 can define a central opening 1040 configured to correspond to and receive the receiving post 1026 when the absorbent pad 1034 is positioned within the tray 1010. In some cases, the absorbent pad 1034 can rest on the tray support structure 1022.

[0129] Actuator assembly 1006, provided in substantially the same form as actuator assembly 206, can include a post 1046, a gear unit 1094 including a gear 1050 positioned therealong, a one-way clutch 1048 positioned between the gear 1050 and the post 1046, and an actuator 1054 positioned on the post 1046. The post 1046, the one-way clutch 1048, and the gear unit 1094 can be configured to rotate together as a single unit in response to rotation of the actuator 1054. The actuator 1054 can be fixedly coupled to the post 1046 through a socket 1128 and can extend upwardly therefrom. A trigger 1124 can be positioned on the actuator 1054 and configured to convert a linear force applied thereto into a rotational force applied to the actuator 1054 and transmitted to the remaining components of the actuator assembly 1006. The gear 1050 can include a sixth plurality of teeth 1056. The actuator assembly 1006 can be positioned adjacent to the tray 1010 such that the sixth plurality of tines 1056 can align with and engage the fifth plurality of tines 1021. That is, the actuator assembly 1006 can perform indexing of the tray 1010 in a manner substantially similar to that described above with reference to FIG.

[0130] 50 and 51 , the shroud 1002 may include an actuator assembly well 1162 and a central post 1164 disposed on and extending upwardly from a platform 1146 of the shroud 1002. The actuator assembly well 1162 may be positioned proximate to the outer wall 1148 within the protruding region 1150. In some cases, one or more connector walls 1166 may extend between the outer wall 1148 and the actuator assembly well 1162, thereby connecting the actuator assembly well 1162 and the outer wall 1148 and providing additional structural stability to the actuator assembly well 1162. A passageway 1170 configured to receive at least a portion of the post 1046 and at least a portion of the gear unit 1094 may extend vertically through the actuator assembly well 1162 such that the actuator assembly 1006 can be mounted within and supported by the actuator assembly well 1162 when the maintenance carousel 1000 is fully assembled. The center post 1164 can be positioned to align with and be received by the receiving posts 1026 of the tray 1010 so that the tray 1010 can be supported by the shroud 1002 for rotation about the center post 1164.

[0131] The shroud 1002 may include one or more bend tabs 1158 formed on the platform 1146. Each bend tab may include a ridge 1184 positioned at an end thereof and may be at least partially surrounded by a moat 1186 that may allow the bend tab 1158 to bend upward or downward relative to the platform 1146. In this manner, the bend tabs 1158 may apply friction to the tray 1010 as described above with reference to FIG. 26 when indexing is performed by the actuator assembly 1006. Additionally, one or more fins 1160 configured to prevent or reduce inadvertent movement of the tray 1010 within the shroud 1002 may be positioned along the outer wall 1148 and may extend inwardly therefrom (e.g., toward the center post 1164).

[0132] As best shown in FIGS. 50 and 51 , the tunnel region 1003 of the shroud 1002 can be defined by a first region 1029 proximate the proximal end 1005 and a second region 1031 proximate the distal end 1007. A plurality of studs 1033 disposed between the tunnel walls 1009 proximate the proximal end 1005 can be positioned within the first region 1029. The studs 1033 can be integrally formed with the platform 1146 or can be coupled to and extend upwardly therefrom. The studs 1033 can be configured to retain one or more filters 1035 disposed in the first region 1029 (see FIG. 52 ) within the path created by the tunnel region 1003 without causing significant obstruction to airflow therethrough.

[0133] The divider 1037 can extend between the tunnel walls 1009 proximate the distal end 1007 and can extend upward from the platform 1146 and / or inward from the tunnel walls 1009. The second region 1031 can be disposed between the divider 1037 and the distal end 1007 of the tunnel region 1003 and can be configured to receive the fan assembly 1001 (see FIG. 52 ). That is, the divider 1037 can be configured to prevent or resist movement of the fan assembly 1001 when the maintenance carousel 1000 is in use.

[0134] 52, a substantially cylindrical collar 1216 defining an opening 1214 extending therethrough can be positioned on the underside 1208 of the shroud cover 1004 proximate the protruding region 1188. The opening 1214 can be positioned to align with the actuator assembly well 1162 and receive at least a portion of the post 1046 of the actuator assembly 1006. That is, when the maintenance carousel 1000 is assembled, at least a portion of the post 1046 can extend through the opening 1214 above the shroud cover 1004 to support the actuator 1054 (see FIG. 46).

[0135] Similar to the shroud 1002, the tunnel region 1003 of the shroud cover 1004 may be defined by a first region 1029 configured to receive one or more filters 1035 and a second region 1031 configured to receive the fan assembly 1001. A divider 1039, provided in substantially the same form as and positioned to align with the divider 1037 of the shroud 1002, may be positioned on the ceiling 1011 and extend downwardly from the ceiling 1011. That is, the divider 1039 of the shroud cover 1004, together with the divider 1037 of the shroud 1002, may help secure the fan assembly 1001 within the second region 1031 when the maintenance carousel 1000 is in use. Similarly, a plurality of pins 1041 configured to align with the plurality of studs 1033 of the shroud 1002 can be disposed on the ceiling 1011 and can extend downwardly from the ceiling 1011. That is, the pins 1041, together with the studs 1033, can help secure one or more filters 1035 (or other components) within the first region 1029.

[0136] 53 , the fan assembly 1001 may be disposed within the shroud 1002 and held between a divider 1037 and the distal end 1007 of the tunnel region 1003. Additionally, one or more filters 1035 may be disposed proximate the proximal end 1005 (e.g., between the platform 1146 and the fan assembly 1001) and held by studs 1033. The one or more filters 1035 may be configured to clean or otherwise remove contaminants or other particulate matter from the air entering the tunnel region 1003 as the fan assembly 1001 draws air through the maintenance carousel 1000.

[0137] In some cases, the filter 1035 may be provided in the form of a piece of reticulated polyurethane foam configured to be positioned between the tunnel wall 1009 and the stud 1033. Alternatively, in some cases, the filter 1035 may be provided in the form of a web or mesh of nonwoven polyester (e.g., plastic). However, in other cases, the filter 1035 may be provided in the form of any suitable air filter (e.g., a meltblown filter formed from polypropylene, polyester, polytetrafluoroethylene (PTFE), or any other suitable material). As shown in FIG. 52 , two filters 1035 are disposed between the studs 1033 and positioned adjacent to each other. However, in other cases, a single filter 1035 or any suitable number of filters 1035 may be provided. In cases where more than one filter 1035 is provided, each filter 1035 may be provided in the same form, or at least one of the filters 1035 may be provided in a different form compared to at least one other filter 1035.

[0138] The maintenance carousel 1000 can be positioned within and operatively engaged by a printer (e.g., printer 100 or any other suitable printing device) in a manner substantially similar to the maintenance carousel 200, as described above with particular reference to Figure 37. That is, the actuator assembly 1006 can drive the indexing of the tray 1010, thereby imparting a generally circular profile to the ink accumulation on the absorbent pad 1034.

[0139] As best shown in FIG. 54 , the windows 1045 can be positioned about the sidewalls 1014 of the tray 1010 such that at least one window is aligned or substantially aligned with the tunnel region 1003 regardless of the rotational position of the tray 1010 relative to the shroud 1002. In this manner, one or more windows 1045 aligned with the tunnel region 1003 can provide a passageway that allows the fan assembly 1001 to draw air (through openings 1008, not shown in FIG. 54 ) into the maintenance carousel 1000. At least a portion of the air can pass through a filter 1035 before the filtered air is expelled out of the maintenance carousel 1000 through an outlet region 1015.

[0140] Waste ink can be released into the maintenance carousel 1000 (e.g., by the printheads 140) in the form of droplets, aerosol particles, or a mixture thereof of various sizes. While heavier droplets of waste ink can naturally fall onto the absorbent pad 1034, smaller droplets and / or aerosol particles may have a tendency to accumulate in other areas. In some cases, ink can accumulate outside the maintenance carousel 1000 and cause damage to critical components of the printer. A consistent airflow through the maintenance carousel 1000 generated by the fan assembly 1001 can direct these smaller droplets and / or aerosol particles toward the tray 1010 and / or filter 1035, where they can be collected. Multiple windows 1045 are provided to prevent the sidewall 1014 from obstructing the airflow through the filter 1035 when the actuator assembly 1006 indexes the tray 1010.

[0141] While the above disclosure has been described with reference to particular embodiments and examples, it will be recognized by those skilled in the art that the above disclosure is not necessarily limited to such embodiments and examples, and that many other embodiments, examples, uses, modifications, and departures from these embodiments, examples, and uses are intended to be encompassed by the claims appended hereto. The entire disclosure of each patent and publication listed herein is incorporated by reference as if each such patent and publication were individually incorporated by reference herein. Various features and advantages of the above disclosure are recited in the following claims. [Explanation of symbols]

[0142] 100 Inkjet Printer 101 Housing 110 Base part 112 Enclosure Cover 114 Hinge 116 Arrow indicating the direction in which the enclosure cover can rotate around the hinge

Claims

1. 1. A maintenance carousel for collecting waste ink in a printer, comprising: an enclosure provided in the form of a shroud and a shroud cover coupled to said shroud, said shroud cover having an opening through which said waste ink can be deposited; a tray supported for rotation within said shroud; an actuator assembly in communication with the tray, the actuator assembly comprising: a one-way clutch configured to permit rotation only in a first direction; an actuator arranged to cause rotation of the one-way clutch; and a gear unit configured to rotate in unison with said one-way clutch and designed to engage said tray; The maintenance carousel further includes:

2. 2. The maintenance carousel of claim 1, wherein the printer is configured to engage the actuator assembly and drive rotation of the tray by impacting the actuator each time one or more printheads of the printer deposit waste ink onto the maintenance carousel.

3. 3. The maintenance carousel of claim 2, further comprising a spring extending between an anchor positioned on said shroud cover and a hook-like portion of said actuator.

4. 4. The maintenance carousel of claim 3, wherein the spring applies a return force to the actuator in response to the printer engaging the actuator.

5. 5. The maintenance carousel of claim 4, wherein said shroud includes a stop positioned to limit rotation of said actuator in response to said return force.

6. 6. The maintenance carousel of claim 5, wherein a direction of rotation of the actuator in response to engagement by the printer corresponds to the first direction of rotation, and wherein the one-way clutch prevents the actuator assembly from driving rotation of the tray when the actuator rotates in response to the return force.

7. the actuator assembly is configured to drive rotation of the tray; the shroud includes one or more bent tabs positioned to apply friction to the tray when the actuator assembly drives rotation of the tray.

10. The maintenance carousel of claim 1.

8. 10. The maintenance carousel of claim 1, wherein an absorbent pad is positioned within the tray and configured to absorb the waste ink dispensed from the printer, the absorbent pad being provided in the form of a felt.

9. 10. The maintenance carousel of claim 1, wherein the actuator assembly causes indexing of the trays.

10. 2. The maintenance carousel of claim 1, wherein waste ink accumulates in said tray in a circular pattern.

11. 1. A maintenance carousel for collecting waste ink in a printer, comprising: The shroud and a shroud cover associated with the shroud, the shroud cover including one or more electrostatic plate housings; one or more electrostatic plates at least partially disposed within the one or more housings, the one or more electrostatic plates configured to generate an electromagnetic field; a tray supported for rotation within said shroud; an actuator assembly configured to drive rotation of the tray, the actuator assembly including an actuator and a clutch; Including, maintenance carousel.

12. 12. A maintenance carousel according to claim 11, wherein the one or more electrostatic plates are provided in the form of two electrostatic metal plates having linear panels with one or more contact points.

13. 13. The maintenance carousel of claim 12, wherein the two electrostatic plates are in communication with a transformer, the transformer configured to apply a voltage to the electrostatic plates.

14. 12. The maintenance carousel of claim 11, wherein the electromagnetic field attracts droplets or aerosol particles of waste ink toward the electrostatic plate.

15. 1. A maintenance carousel for collecting waste ink in a printer, comprising: an enclosure including one or more openings, the one or more openings designed to receive the waste ink from the printer; and a tray disposed within the enclosure; an actuator assembly in communication with the tray, the actuator assembly including an actuator, a clutch, and a gear unit configured to rotate with the clutch; a fan assembly in communication with the enclosure and the tray, the fan assembly configured to generate airflow through the maintenance carousel; Equipped with the printer is configured to engage the actuator assembly and drive rotation of the tray by impacting the actuator each time one or more printheads of the printer deposit waste ink onto a maintenance carousel; Maintenance carousel.

16. 16. The maintenance carousel of claim 15, wherein at least one window is formed in the tray, the window allowing air to flow from the tray to an exterior of the enclosure.

17. 16. The maintenance carousel of claim 15, wherein the fan assembly is configured to draw air into the maintenance carousel through the one or more openings and to expel air from the maintenance carousel through an output area associated with a fan tunnel.

18. 18. The maintenance carousel of claim 17, wherein one or more filters are positioned in the fan tunnel between the fan assembly and the tray.

19. 20. The maintenance carousel of claim 18, wherein the fan tunnel includes one or more dividers configured to hold the fan assembly in place and one or more studs configured to hold the one or more filters in place.

20. 20. The maintenance carousel of claim 18, wherein the one or more filters are provided in the form of reticulated polyurethane foam.

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