Printing plate pressure regulating system and can decorating machine using the same

Abstract

A printing plate pressure regulating system for a can decorating machine, the can decorating machine including a printing plate roller assembly having a printing plate roller drive shaft and a blanket roller. The system includes: an actuator; a control system configured to control the operation of the actuator to regulate the pressure between the printing plate roller assembly and the blanket roller; an eccentric bushing disposed around the printing plate roller drive shaft, wherein rotation of the eccentric bushing causes the printing plate roller to move toward or away from the blanket roller; and a drive mechanism coupled between the actuator and the eccentric bushing, wherein operation of the actuator causes the drive mechanism to rotate the eccentric bushing.

Description

Technical Field

[0001] The disclosed concept generally relates to an adjustment system for a can decorating machine used in the food and beverage packaging industry, and more particularly to an adjustment system for a can decorating machine configured to adjust the pressure between the printing plate and the rubber blanket wheel. Background Technology

[0002] High-speed, continuous motion machines used for decorating cans (commonly referred to as "can decorating machines" or simply "can decorating machines") are generally well known. Figure 1 A can decorating machine 2 is shown. (As shown) Figure 1 As shown, the can decorating machine 2 includes a feed conveyor 15 that receives cans 16 from a can supply source (not shown) and guides these cans along the periphery of spaced parallel rings fastened to grooved wheels 12 to arcuate brackets or grooves 17. The grooved wheels 12 are fixedly fastened to a continuously rotating mandrel bearing wheel 18, which in turn is keyed to a continuously rotating horizontal drive shaft 19. Each horizontal spindle or mandrel (not shown) pivotable about its own axis is mounted to the mandrel bearing wheel 18 adjacent to its periphery. Downstream of the feed conveyor 15, each spindle or mandrel is axially aligned closely spaced from the individual grooves 17, and undecorated cans 16 are conveyed from the grooves 17 to the mandrels. Suction applied through the axial channels of the mandrels draws the cans 16 into their final placement position on the mandrels.

[0003] When mounted on the mandrel, each can 16 is decorated by engaging with a rubber blanket (e.g., but not limited to, a replaceable rubber sheet backed with adhesive) on a rubber blanket wheel of a multicolor printing unit generally indicated by reference numeral 22. Thereafter, and while still mounted on the mandrel, the outer side of each decorated can 16 is coated with a varnish protective film applied by engaging the periphery of a varnish coating roller (not shown), which rotates on shaft 23 in a varnish coating unit generally indicated by reference numeral 24. The cans 16 with their decorative and protective coating are then conveyed from the mandrel to a suction cup (not shown) mounted adjacent to the periphery of a conveyor wheel (not shown) rotating on shaft 28 of a conveyor unit 27. The cans 16 are then stored from the conveyor unit 27 on generally horizontal pins 29 carried by a chain-type output conveyor 30, which carries the cans 16 through a curing oven (not shown).

[0004] As it moves toward engagement with the undecorated can 16, the blanket 21 engages multiple printing rollers 31, each printing roller with a separate ink station assembly 32 (e.g., eight exemplary ink station assemblies 32). Figure 1(As shown in the diagram) are associated. Typically, each component 32 provides ink of a different color, and each printing roller 31 applies a different ink image segment to the blanket. All the "ink image" segments are combined to produce a "master image," which is configured to be applied to the can. The "master image" is then transferred to the undecorated can 16 and becomes the "can applied image" as used herein.

[0005] Each ink station assembly 32 includes multiple rollers, or "rollers" configured to deliver a certain amount of ink from a reservoir as used herein, or "ink fountains" to a blanket as used herein. As used herein, the path of ink travel is referred to as an "ink train." That is, the rollers on which the ink travels define the "ink train." Furthermore, as used herein, the "ink train" has a orientation where the ink fountain is at the "upstream" end of the ink train and the printing cylinder 31 is at the "downstream" end of the ink train.

[0006] The ink stream extends across a number of rollers, each with a specific purpose. As shown, the ink stream begins at the ink fountain and is initially applied as a film to the ink fountain roller. This ink fountain roller is intermittently engaged by a guide roller. When the guide roller engages the ink fountain roller, a certain amount of ink is transferred to it. The guide roller also intermittently engages downstream rollers and transfers ink to them. The guide roller has a "duty cycle," which, as used herein, is the ratio of the duration of contact between the guide roller and the ink fountain roller to the duration of a complete cycle (the guide roller contacts the ink fountain roller, moves to the first downstream roller, contacts the first steel roller, and moves back to the ink fountain roller).

[0007] Other rollers include, but are not limited to, distribution rollers, oscillating rollers, and transfer rollers. Typically, these rollers are configured to distribute ink such that an appropriate amount of ink is applied substantially uniformly to the printing cylinder 31. For example, oscillating rollers are configured to reciprocate longitudinally about their axis of rotation to spread the ink as it is applied to the next downstream roller. The final roller is the printing cylinder 31, which applies ink to the blanket. It is understood that each ink station assembly 32 applies an "ink image" of a selected single color to the blanket, and each ink station assembly 32 must apply the ink image in the appropriate position relative to other ink images so that the main image does not have an offset ink image.

[0008] Therefore, as used herein, "ink image" refers to an image of a single ink color that is part of the "main image". As used herein, "main image" refers to an image created from a number of ink images, and that image is applied to the can as a "can application image". It can be understood that the "main image" comprises a number of ink images, typically multiple ink images. For example, if the main image is the French flag (which is a tricolor flag with three vertical stripes of blue (wide side), white, and red), then the ink station component 32 with blue ink will provide a blue rectangular ink image, the ink station component 32 with white ink will provide a white rectangular ink image, and the ink station component 32 with red ink will provide a red rectangular ink image. Furthermore, assuming the main image is the French flag with the wide side on the left, the ink station assembly 32 with blue ink will provide a blue rectangular ink image on the left side of the rubber blanket, the ink station assembly 32 with white ink will provide a white rectangular ink image adjacent to the blue rectangular ink image in the center of the rubber blanket, and the ink station assembly 32 with red ink will provide a red rectangular ink image adjacent to the white rectangular ink image on the right side of the rubber blanket. Once all the ink images are applied to the rubber blanket, the main image is formed and then applied to the canister.

[0009] Each ink station assembly 32 is configured such that the last (or one or more) rollers preceding the printing cylinder 31 apply an appropriate amount of ink to the printing cylinder 31. Those skilled in the art understand the amount of ink required to produce an image with the desired sharpness, resolution, and hue. Therefore, as will be understood by those skilled in the art, and as used herein, an "appropriate" amount of ink is an amount that is neither too little (which typically results in a weak image) nor too much (which typically results in a blurry image), i.e., an "appropriate" amount of ink that results in an image with the desired sharpness, resolution, and hue. Furthermore, the "appropriate" amount of ink applied to the printing cylinder 31 is also a film with a substantially uniform thickness. It is understood that those skilled in the art understand the amount of ink required to apply to a substrate (e.g., but not limited to a can) to produce an image with the desired sharpness, resolution, and hue.

[0010] Similarly, each ink station assembly 32 is configured such that the printing cylinder 31 applies an ink image at the appropriate position on the blanket. Those skilled in the art know where the ink should be located on the printing cylinder 31 to produce the intended image. Further, as those skilled in the art will understand, and as used herein, “appropriate position” for an ink image means that the ink image is applied to the blanket at the intended position relative to other ink images applied by other ink station assemblies 32, and all ink images form the master image, wherein the individual ink images do not overlap in an unintended manner. Further, “appropriate position” for an ink image means that the ink images, and therefore the master image, have intended sidelay registration and intended circumferential registration. As used herein, “intended” sidelay / circumferential registration means that the sidelay / circumferential registration makes the can-applied image the intended image. As used herein, “intended image” refers to an image created by the image creator, as those skilled in the art will understand. As used herein, “can-applied image” refers to an image applied to the can; that is, the image on the can after the printing operation is completed.

[0011] Therefore, it is important to provide the printing cylinder 31 with the most consistent ink film thickness possible so that the printing plate imparts a clear and consistent image to the printing blanket 21 and ultimately to the final printing substrate (e.g., can 16). Inconsistencies in the ink film can lead to variable color density on the printed image and the possibility of “ghosting” of the image, where a lighter copy or duplicate of the image, in addition to the main image, is also undesirably applied to can 16.

[0012] Typically, ink station control is performed by a technician who monitors the output of the can decorator and manually adjusts various components of the ink station assembly and / or blanket rollers to apply ink in the appropriate amount and at the appropriate location. For example, the pressure of the printing cylinder 31 on the blanket 21 is adjustable. Typically, this adjustment assembly includes a manually rotated knob operably connected to an eccentrically shaped bushing in the printing cylinder 31. Operation of the knob causes the surface of the printing cylinder 31 to move closer to or further away from the surface of the blanket 21; closer movement increases pressure, while further movement decreases pressure. Excessive pressure can degrade image quality, resulting in defects such as dot gain, smudging, rough edges due to ink buildup, or stretched images. Insufficient pressure can also degrade image quality, resulting in defects such as light printing or missed printing. Manual adjustment can be inconsistent. Some systems use electronic positioning systems that rely on stepper motors or servo motors, which may not withstand the conditions in which they are used and can be expensive.

[0013] The image quality issues mentioned above, and the need to manually correct these errors, are problematic. Furthermore, if the can image does not meet specifications during the initial labeling process or during labeling operation, a large number of defective cans can accumulate in a short period, resulting in lost production. This is a problem. Therefore, there is room for improvement in can decorating machines and methods, as well as in ink station components. Summary of the Invention

[0014] These and other requirements are met by at least one embodiment of the disclosed concept, which provides a printing plate pressure regulating system for a can decorating machine, the can decorating machine including a printing plate roller assembly having a printing plate roller drive shaft and a blanket wheel, the system comprising: an actuator; a control system configured to control the operation of the actuator to regulate the pressure between the printing plate roller assembly and the blanket wheel; an eccentric bushing disposed about the printing plate roller drive shaft, wherein rotation of the eccentric bushing causes the printing plate roller to move toward or away from the blanket wheel; and a drive mechanism coupled between the actuator and the eccentric bushing, wherein operation of the actuator causes the drive mechanism to rotate the eccentric bushing.

[0015] These and other requirements are met by at least one embodiment of the disclosed concept, which provides a printing plate pressure regulating system for a can decorating machine, the can decorating machine including a printing plate roller assembly having a printing plate roller drive shaft and an eccentric bushing disposed around the printing plate roller drive shaft, and a blanket roller, wherein rotation of the eccentric bushing causes the printing plate roller to move toward or away from the blanket roller, the system including: an actuator; a drive mechanism coupled between the actuator and the eccentric bushing, the drive mechanism including: a worm gear configured to rotate in response to operation of the actuator; an eccentric pivot operably coupled to the worm gear and configured to rotate with rotation of the worm gear; and an elongated member coupled between the eccentric pivot and the eccentric bushing, wherein the elongated member is configured to rotate the eccentric bushing in response to rotation of the eccentric pivot.

[0016] These and other requirements are met by at least one embodiment of the disclosed concept, which provides a can decorating machine comprising: a rubber blanket wheel; a printing plate roller assembly having a printing plate roller drive shaft and an eccentric bushing disposed around the printing plate roller drive shaft, wherein rotation of the eccentric bushing causes the printing plate roller to move toward or away from the rubber blanket wheel; and a printing plate pressure regulating assembly comprising: an actuator; a control system configured to control operation of the actuator to regulate pressure between the printing plate roller assembly and the rubber blanket wheel; and a drive mechanism coupled between the actuator and the eccentric bushing, wherein operation of the actuator causes the drive mechanism to rotate the eccentric bushing. Attached Figure Description

[0017] A full understanding of the invention will be obtained from the following description of preferred embodiments, which are read in conjunction with the accompanying drawings:

[0018] Figure 1 This is a side elevation view of a can decorating machine using existing technology;

[0019] Figure 2 This is a perspective view of a can decorating machine and a portion of its ink station assembly according to an embodiment of the disclosed concept;

[0020] Figure 3 yes Figure 2 A partial schematic 3D view of one of the ink station components;

[0021] Figure 4 yes Figure 3 A side elevation view of the ink station component, in which one side panel has been removed to reveal the hidden structure;

[0022] Figure 5 This is a schematic side view of the ink station component, showing the ink column;

[0023] Figure 6 This is an exploded three-dimensional view of the ink application adjustment component;

[0024] Figure 7 This is a side cross-sectional view of the ink application adjustment component;

[0025] Figure 8 It is a perspective view of a printing plate roller pressure regulating assembly that is operatively connected to the printing roller assembly;

[0026] Figure 9 This is an exploded view of the printing plate roller pressure adjustment assembly;

[0027] Figure 10 This is a top view of the printing plate roller pressure adjustment assembly;

[0028] Figure 11 This is a top view of the printing plate roller pressure adjustment assembly shown in partial cross-section, illustrating the worm gear drive mechanism;

[0029] Figure 12 It is a perspective view of the printing plate roller assembly and the blanket roller; and

[0030] Figure 13 This is a schematic diagram of the control system used for the pressure regulating assembly of the printing plate roller. Detailed Implementation

[0031] It will be understood that the specific elements shown in the accompanying drawings and described in the following description are merely exemplary embodiments of the disclosed concept and are provided for illustrative purposes only as non-limiting examples. Therefore, specific dimensions, orientations, components, number of parts used, embodiment configurations, and other physical characteristics relating to the embodiments disclosed herein are not to be considered as limitations on the scope of the disclosed concept.

[0032] Directional phrases used herein, such as clockwise, counterclockwise, left, right, top, bottom, up, down, and their derivatives, refer to the orientation of the elements shown in the accompanying drawings and do not limit the claims, unless expressly stated herein.

[0033] As used in this article, the singular forms of “a,” “one,” and “the” include multiple references unless the context clearly indicates otherwise.

[0034] As used herein, “constructed as [verb]” means that the identified element or component has a structure that is shaped, sized, set, connected, and / or configured to perform the identified verb. For example, a component “constructed to move” is movably coupled to another element and includes elements that cause the component to move or the component is otherwise configured to move in response to other elements or components. Thus, as used herein, “constructed as [verb]” describes structure, not function. Furthermore, as used herein, “constructed as [verb]” means that the identified element or component is intended and designed to perform the identified verb. Therefore, an element that can only perform the identified verb but is not intended and designed to perform the identified verb is not “constructed as [verb]”.

[0035] As used herein, in terms such as, but not limited to, “[X] constructed as [verb][Y]”, “[Y]” is not a descriptive element. Rather, “[Y]” further defines the structure of “[X]”. That is, in the following two examples, it is assumed that “[X]” is an “installation” and the [verb] is a “support”. In the first example, the entire term is “installation constructed to support a flying bird.” That is, in this example, “[Y]” is a “flying bird.” It is known that, unlike swimming / walking birds, flying birds typically grasp branches for support. Therefore, for an installation to be constructed to support a flying bird, i.e., “[X]”, the installation is shaped and sized to resemble a branch that a flying bird can grasp. However, this does not mean that the bird is being described. In the second example, “[Y]” is a house; that is, the second exemplary term is “installation constructed to support a house.” In this example, the installation is constructed as a foundation, since houses are known to be supported by foundations. As mentioned earlier, the house is not described, but rather the shape, size, and configuration of the installation is defined, that is, the shape, size, and configuration of "[X]" in the term "[X] constructed as [verb][Y]".

[0036] As used in this article, "associated" means that the components are parts of the same assembly and / or operate together, or act / cooperate with each other in some way. For example, a car has four tires and four wheel covers. While all the components are connected as parts of the car, it can be understood that each wheel cover is "associated" with a specific tire.

[0037] As used herein, a “connecting assembly” includes two or more connecting elements or connecting components. The components of a connecting element or connecting assembly are typically not part of the same element or other component. Therefore, the components of a “connecting assembly” may not be described simultaneously in the following description.

[0038] As used herein, "connector" or "(one or more) connecting parts" refers to one or more parts of a connecting assembly. That is, a connecting assembly includes at least two parts configured to be joined together. It is understood that the parts of a connecting assembly are compatible with each other. For example, in a connecting assembly, if one connecting part is a snap-fit ​​socket, then another connecting part is a snap-fit ​​plug, or if one connecting part is a bolt, then another connecting part includes a nut (and an opening through which the bolt extends) or a threaded hole.

[0039] As used herein, a "fastener" is a separate component constructed to connect two or more elements. Thus, for example, a bolt is a "fastener," but a mortise and tenon joint is not. That is, a mortise and tenon element is part of the elements being connected and is not a separate component.

[0040] As used herein, the statement that two or more parts or components are “connected” means that the parts are directly or indirectly joined together or operate together, i.e., through one or more intermediate parts or components, as long as a link occurs. As used herein, “direct connection” means that two elements are in direct contact with each other. As used herein, “fixed connection” or “fixed” means that two components are connected to move as a whole while maintaining a constant orientation relative to each other. Thus, when two elements are connected, all parts of these elements are connected. However, the description that a specific part of the first element is connected to the second element, such as the first end of a shaft being connected to a first wheel, means that a specific part of the first element is positioned closer to the second element than other parts of the first element. Furthermore, an object resting on another object held in place only by gravity is not “connected” to the object below unless the object above is otherwise substantially held in place. That is, for example, a book on a table is not connected to the table, but a book glued to the table is connected to the table.

[0041] As used herein, the phrase "removably connected" or "temporarily connected" refers to a connection between one component and another in a substantially temporary manner. That is, the two components are connected such that joining or separating them is easy and does not damage them. For example, two components fastened to each other with a limited number of easily accessible fasteners, i.e., not hard-to-reach fasteners, are "removably connected," while two components welded together or joined by hard-to-reach fasteners are not "removably connected." "Hard-to-reach fasteners" are fasteners that require the removal of one or more other components before accessing them, where "other components" are not access devices, such as, but not limited to, doors.

[0042] As used herein, “operably coupled” means that a number of elements or components (each of which is movable between a first position and a second position or between a first configuration and a second configuration) are coupled such that when a first element moves from one position / configuration to another, a second element also moves between those positions / configurations. Note that a first element can be “operably coupled” to another element, but the reverse is not true. With respect to electronic devices, a first electronic device is “operably coupled” to a second electronic device when the first electronic device is configured and actually sends a signal or current to a second electronic device, thereby causing the second electronic device to be actuated or otherwise powered or activated.

[0043] As used herein, "temporary setup" means that a first element or component is placed on a second element or component in a manner that allows the first element / component to move without having to disengage or otherwise manipulate it. For example, a book simply placed on a table (i.e., not glued or secured to the table) is "temporarily set" on the table.

[0044] As used herein, the statement that two or more parts or components “engage” with each other means that the elements directly or through one or more intermediate elements or components apply force or bias to each other. Furthermore, as used herein with respect to a moving part, a moving part may “engage” with another element during movement from one position to another and / or may “engage” with another element once it is in said position. Therefore, it can be understood that the statements “when element A moves to the first position of element A, element A engages element B” and “when element A is in the first position of element A, element A engages element B” are equivalent statements and mean that element A engages element B when it moves to the first position of element A and / or element A engages element B when it is in the first position of element A.

[0045] As used herein, “operably engaged” means “engaged and movable.” That is, when used in relation to a first component configured to move a movable or rotatable second component, “operably engaged” means that the first component applies a force sufficient to cause the second component to move. For example, a screwdriver can be positioned to contact a screw. When no force is applied to the screwdriver, the screwdriver is only “temporarily engaged” with the screw. If an axial force is applied to the screwdriver, the screwdriver presses against the screw and “engages” it. However, when a rotational force is applied to the screwdriver, the screwdriver “operably engages” the screw and causes the screw to rotate. Furthermore, for electronic components, “operably engaged” means that one component controls another component via a control signal or current.

[0046] As used herein, in the phrases “[x] moves between its first and second positions” or “[y] is constructed to cause [x] to move between its first and second positions,” “[x]” is the name of an element or component. Furthermore, when [x] is an element or component that moves between a number of positions, the pronoun “its” refers to “[x],” that is, the element or component preceding the pronoun “its.”

[0047] As used herein, “corresponding” means that two structural components are sized and shaped similarly to each other and can be joined with minimal friction. Therefore, the opening “corresponding” to a component is sized slightly larger than the component, allowing the component to pass through the opening with minimal friction. This definition is modified if the two components are to fit together “tightly.” In this case, the difference in size between the components is even smaller, thereby increasing the amount of friction. If the element defining the opening and / or the component inserted into the opening is formed of a deformable or compressible material, the opening can even be slightly smaller than the component inserted into the opening. Regarding surfaces, shapes, and lines, two or more “corresponding” surfaces, shapes, or lines have substantially the same size, shape, and profile. Regarding movable or configurable elements / assemblies, “corresponding” means that when elements / assemblies are related, and when one element / assembly is moved / reconfigured, the other element / assembly is also moved / reconfigured in a predetermined manner. For example, a lever comprising a central fulcrum and an elongated plate, i.e., a “seesaw” or “barrel,” the plate having a first end and a second end. When the first end of the plate is in a raised position, the second end of the plate is in a lowered position. When the first end of the plate moves to the lowered position, the second end of the plate moves to the corresponding raised position. Alternatively, the camshaft in the engine has a first cam angle operably coupled to the first piston. When the first cam angle moves to its upward position, the first piston moves to the corresponding upper position, and when the first cam angle moves to its lower position, the first piston moves to the corresponding lower position.

[0048] As used herein, when used in association with a moving element, a “path of travel” or “path” includes the space through which the element moves when in motion. Therefore, any moving element inherently possesses a “path of travel” or “path.” Furthermore, a “path of travel” or “path” refers to the movement of an identifiable structure as a whole relative to another object. For example, assuming a perfectly smooth road, a rotating wheel (identifiable structure) on a car typically does not move relative to the car body (another object). That is, the wheel as a whole does not change its position relative to, for example, an adjacent fender. Therefore, a rotating wheel does not have a “path of travel” or “path” relative to the car body. Conversely, an intake valve (identifiable structure) on that wheel does have a “path of travel” or “path” relative to the car body. That is, as the wheel rotates and is in motion, the intake valve as a whole moves relative to the car body.

[0049] As used in this article, the term "single" refers to a component created as a single part or unit. That is to say, a component that includes parts created individually and then joined together as units is not a "single" component or body.

[0050] As used in this article, “integration” means that all components of a component are located in a single location and / or within a single housing, frame or similar structure.

[0051] As used herein, the term “quantity” should refer to an integer of one or more (i.e., multiple). That is, for example, the phrase “a certain number of elements” refers to one element or multiple elements. It is particularly noteworthy that the term “a certain ‘quantity’ of [X]” includes a single [X].

[0052] As used herein, a “radial side / surface” for a circular or cylindrical body is a side / surface extending around or through a height line that passes through its center. As used herein, a “axial side / surface” for a circular or cylindrical body is a side extending in a plane substantially perpendicular to the height line passing through the center. That is, generally, for a cylindrical soup pot, the “radial side / surface” is the generally circular sidewall, and the “axial side / surface” is the top and bottom of the soup pot. Further, as used herein, “radial extension” means extending in the radial direction or along a radial line. That is, for example, a “radial extension” line extends from the center of the circle or cylinder toward the radial side / surface. Further, as used herein, “axial extension” means extending in the axial direction or along an axial line. That is, for example, an “axial extension” line extends from the bottom of the cylinder toward the top of the cylinder and is substantially parallel to or along the central longitudinal axis of the cylinder.

[0053] As used in this article, a “tension member” is a structure that has its maximum length when exposed to tension, but is otherwise essentially flexible, such as, but not limited to, chains or cables.

[0054] As used herein, “generally curved” includes elements having multiple curved portions, combinations of curved and planar portions, and multiple linear / planar portions or segments arranged at angles relative to each other to form a curve.

[0055] As used herein, an "elongated" element inherently includes a longitudinal axis and / or longitudinal line extending in the direction of elongation.

[0056] As used herein, in phrases such as “set around [element, point, or axis]”, “extend around [element, point, or axis]”, or “around [element, point, or axis] [X] degrees”, “around” means to encircle, extend around, or encircle the measurement. When used to refer to a measurement or in a similar manner, “about” means “approximately,” that is, within the approximate range associated with the measurement, as would be understood by one of ordinary skill in the art.

[0057] As used herein, “usually” means “in a general manner” in relation to the term being modified, as would be understood by one of ordinary skill in the art.

[0058] As used herein, “substantially” means “in a large quantity or degree” in relation to the term being modified, as would be understood by one of ordinary skill in the art.

[0059] As used herein, “at” means in relation to and / or near the term being modified, as would be understood by one of ordinary skill in the art.

[0060] As used herein, “electronic communication” refers to the transmission of signals via electromagnetic waves or signals. “Electronic communication” includes both hard-wired and wireless communication; therefore, for example, “data transfer” or “communication method” via a component that “electronically communicates” with another component means the transfer of data from one computer to another (or from one processing component to another) via a physical connection such as USB, Ethernet connection or remote connection such as NFC, Bluetooth, etc., and should not be limited to any particular device.

[0061] As used herein, “electronic communication” means that current is flowing or can flow between the identified components. Being in “electronic communication” also depends on the location or configuration of the components. For example, in a circuit breaker, the movable and fixed contacts are in “electronic communication” when each contact is in the closed position. The same movable and fixed contacts are not in “electronic communication” when each contact is in the open position.

[0062] As used herein, a "computer" is a device configured to process data and includes: at least one input device, such as a keyboard, mouse, or touchscreen; at least one output device, such as a monitor or graphics card; a communication device, such as an Ethernet card or a wireless communication device; permanent storage, such as a hard disk drive; temporary storage, i.e., random access memory; and a processor, such as programmable logic circuitry. A "computer" can be a traditional desktop unit, but also includes cellular phones, tablet computers, laptop computers, and other devices, such as gaming devices adapted to include components such as, but not limited to, those identified above. Furthermore, a "computer" can include components that are physically located in different places. For example, a desktop unit may utilize a remote hard disk drive for storage. As used herein, such physically separated elements are "computers".

[0063] As used herein, the term "display" refers to a device configured to present a visual image. Furthermore, as used herein, "presentation" refers to a device that creates an image on a display that a user can see.

[0064] As used herein, “computer-readable media” includes, but is not limited to, hard disk drives, CDs, DVDs, magnetic tapes, floppy drives, and random access memory.

[0065] As used herein, “permanent memory” means a computer-readable storage medium, and more specifically, a computer-readable storage medium configured to record information in a non-transitory manner. Therefore, “permanent memory” is limited to non-transitory tangible media.

[0066] As used in this article, "stored in permanent storage" means that the modules of executable code or other data have been functionally and structurally integrated into the storage medium.

[0067] As used herein, a “file” is an electronic storage structure for containing executable code that is being processed, or data that may be represented as text, images, audio, video, or any combination thereof.

[0068] As used herein, a “module” is an electronic structure used by a computer or other processing component, and includes, but is not limited to, a set of interactive computer files, such as executable code files and data storage files, used by a processor and stored on a computer-readable medium. A module may also include a number of other modules. It is understood that modules can be identified by their functional purpose. Unless otherwise stated, each “module” is stored in, or incorporated into, the permanent memory of at least one computer or processing component. Therefore, and as used herein, all modules define the structure and do not describe the function. All modules are schematically shown in the accompanying drawings.

[0069] As used herein, “constructed as [verb]” when used in relation to a module means that a module comprises executable computer instructions, code, or similar elements designed and intended to achieve the purpose of the module. As mentioned above, all modules are incorporated into permanent memory and thus define the structure but not the function.

[0070] As used in this article, “automatic” refers to a structure that operates without human input / action. A structure is “automatic” even if it requires human intervention for initial setup or installation and / or maintenance or calibration, as long as the structure typically operates thereafter without human input / action.

[0071] As used herein, the term “can” refers to any known or suitable container constructed to contain a substance (e.g., but not limited to liquids; food; any other suitable substance), and explicitly includes, but is not limited to, food cans and beverage cans, such as beer cans and soft drink cans.

[0072] like Figure 2As shown, the can decorating machine 100 (or, as used herein, "can decorating machine 100") includes a can transport assembly 102 (shown schematically) and an ink application system 104. The can transport assembly 102 is substantially similar to the can transport structure described above, the description of which is incorporated herein. Typically, the can transport assembly 102 is configured to move a number of undecorated cans 300 into contact with the ink application system 104 and, as shown, with the blanket roller 112 and / or the image transfer section 114, as described below.

[0073] The ink application system 104 is configured to apply ink to the exterior of each canister 300 in a selected pattern. That is, the ink application system 104 includes a plurality of ink station assemblies 200 (eight shown) and a blanket roller 112. The blanket roller 112 is an assembly including a roller frame 113 (i.e., a frame forming a generally disc-shaped body) and a plurality of image transfer sections 114 (in... Figure 4 (shown in dashed lines) is disposed on its radial surface. Preferably, the rubber blanket 112 is configured to transfer the main image (which comprises multiple combined "ink images") from each image transfer section 114 to a corresponding tank 300.

[0074] As previously mentioned, the can decorating machine 100 also includes multiple ink station assemblies 200. It will be understood that while the can decorating machine 100 in the example shown and described herein includes eight ink station assemblies 200, it may alternatively include any known or suitable alternative number and / or configuration of ink station assemblies (not shown) without departing from the scope of the disclosed concept. It will also be understood that, for the sake of economic disclosure and simplicity, only one of the ink station assemblies 200 will be shown and described in detail herein.

[0075] Figure 3 and Figure 4 A non-limiting example embodiment of the ink station assembly 200 is shown in more detail. Specifically, the ink station assembly 200 includes an ink fountain 202 configured to provide a supply of ink 400. Figure 3 The diagram is shown in simplified form with dashed lines; see also [link to diagram]. Figure 5The ink fountain roller 204 receives ink 400 from the ink fountain 202. The ink station assembly 200 also includes a distribution roller 206 and an ink guide roller 208 that operates in conjunction with the ink fountain roller 204 and the distribution roller 206 to transfer ink 400 from the ink fountain roller 204 to the distribution roller 206. That is, the ink guide roller 208 is part of the ink guide roller assembly 207, which also includes a duty cycle adjustment assembly 209 configured to cause the ink guide roller 208 to reciprocate between two positions, a first position and a second position; in the first position, the ink guide roller 208 engages the ink fountain roller 204 to cause ink to be transferred from the ink fountain roller 204 to the ink guide roller 208, and the ink guide roller 208 is spaced apart from the distribution roller 206; in the second position, the ink guide roller 208 is spaced apart from the ink fountain roller 204, and the ink guide roller 208 engages the distribution roller 206 to cause ink to be transferred from the ink guide roller 208 to the distribution roller 206. Duty cycle adjustment component 209 is configured to change the duty cycle of ink guide roller 208 (see...) Figure 4 The adjustment position of the ink guide roller 208 is shown in the figure (indicated by the dashed line). That is, the duty cycle adjustment component 209 is configured to change the length of time that the ink guide roller 208 engages with the ink fountain roller 204.

[0076] Furthermore, a number of oscillating rollers 210, 212 (two are shown) each have longitudinal axes 214, 216. The oscillating rollers 210, 212 are configured and do indeed oscillate back and forth along their longitudinal axes 214, 216. As an example, but not limited to, the oscillating roller 212 oscillates back and forth along axis 216 in a direction approximately indicated by arrow 217. The oscillating roller 210 oscillates back and forth along longitudinal axis 214 in a similar manner.

[0077] The exemplary ink station assembly 200 also includes two transfer rollers 218, 220, each cooperating with at least one of the oscillating rollers 210, 212. However, it will be understood that any known or suitable alternative number and / or configuration of transfer rollers (not shown) may be employed without departing from the scope of the disclosed concept.

[0078] The printing plate roller assembly 221 includes a printing plate roller 222 having a printing plate (generally indicated by reference numeral 224), as well as an axial adjustment assembly 226 and a circumferential adjustment assembly 228 for the printing plate roller, such as... Figure 3 As schematically shown. The printing plate cylinder 222 cooperates with a number of forming rollers 230 to apply ink 400 to the printing plate 224. As described above, the printing plate cylinder 222 engages with the blanket roller 112 and / or the image transfer section 114. The blanket roller 112 ( Figure 2 and Figure 4 ) and / or image transfer section 114 ( Figure 2 and Figure 4) Connecting tank body 300 ( Figure 2 This transfers the ink to the 300mm can. Figure 2 (Simplified form shown in dashed lines). Therefore, typically, each ink station component 200 defines an "ink column 402", such as... Figure 5 As shown, the ink 400 is thus conveyed from the ink fountain roller 204 to the forming roller 230 as described above. Furthermore, a broad purpose of the various rollers discussed above is to spread the ink to form a thin ink film and to disperse the ink so that the ink film has a substantially uniform thickness when applied to the printing plate 224. That is, the ink 400 on each roller, such as the distribution roller 206, is in the form of a film that progressively thins and is uniformly distributed on the surface of the roller.

[0079] like Figure 3 As shown in the optimal configuration, the ink station assembly 200 further includes opposing first side plates 260 and second side plates 262, a drive assembly 264, and a housing 266 that at least partially surrounds the drive assembly 264. The first side plate 260 has opposing first sides 268 and second sides 270. Ink fountain roller 204, dispensing roller 206, guide roller 208, oscillating rollers 210 and 212, conveying rollers 218 and 220, and a single forming roller 230 are all rotatably disposed between the first side plate 260 and the second side plate 262. The drive assembly 264 is disposed on the second side 270 of the first side plate 260 and configured to drive at least the ink fountain roller 204, dispensing roller 206, and oscillating rollers 210 and 212 in a manner generally known.

[0080] Initially, the thickness of the ink 400 applied to the ink fountain roller 204 is controlled by the ink application adjustment assembly 500, which is part of each ink fountain 202. For example... Figure 6 and Figure 7 As shown, the ink application adjustment assembly 500 of the ink fountain (hereinafter and as used herein, "ink application adjustment assembly 500") is configured to reduce or limit the amount of ink applied to the ink fountain roller 204, or to reduce / limit the amount of ink applied to a portion of the ink fountain roller 204. The ink application adjustment assembly 500 includes a mounting assembly 502, a scraper assembly 504, and an adjustment structure 506. In an exemplary embodiment, as shown, the mounting assembly 502 includes a mounting body 510 (hereinafter and as used herein, "mounting member 510"), a clamping plate 512, a back plate 514, two side plates 516, 518, and a number of seals (not indicated by reference numerals).

[0081] In an exemplary embodiment, the mounting member 510 includes a generally planar lower surface 520 and a generally planar upper surface 522. In an exemplary embodiment, the lower surface 520 and upper surface 522 of the mounting member are angled relative to each other. As shown, this angle is approximately 15 degrees. The clamping plate 512 is a substantially rigid planar body 530 that is configured and actually coupled to the upper surface 522 of the mounting member. In an exemplary embodiment, the back plate 514 is a planar body 532 made of resilient spring steel and is configured to reinforce the bias of the scraper assembly 504.

[0082] like Figure 6 As shown, the scraper assembly 504 includes a scraper 540, which is a generally planar elastic body 542 having a first edge 544. The first edge 544 of the scraper includes a plurality of adjustable portions 546. As described below, the scraper 440 is disposed adjacent to the outer surface of the ink fountain roller 204, as... Figure 7 As shown. Therefore, the adjustable portion 546 of the first edge of the scraper is configured and does indeed move between a first position and a second position, in the first position, the adjustable portion 546 of the first edge of each scraper is spaced apart from the outer surface of the ink fountain roller 204, and in the second position, the adjustable portion 546 of the first edge of each scraper is closer to the outer surface of the ink fountain roller 204. That is, it can be understood that the first position and the second position are relative positions, wherein the second position is closer to the outer surface of the ink fountain roller 204. The adjustable portion 546 of the first edge of each scraper is also configured to be disposed in a number of intermediate positions between the first position and the second position.

[0083] In an exemplary, non-limiting embodiment, such as Figure 6 As shown, the scraper 540 includes a number of elongated segments 550 disposed adjacent to each other. Each scraper segment 550 includes an adjustable portion 546 of a first edge of the scraper. In another non-limiting embodiment (not shown), the scraper body 542 is a single body including parallel slits (not shown) extending inward from the first edge 544 of the scraper. That is, generally, the scraper body 542 is similar to a comb, but wherein there is no gap or minimal gap between the "teeth" of the comb. In another embodiment (not shown), the scraper body 542 is a highly resilient single body, wherein a bias applied to one region of the first edge 544 of the scraper does not significantly transmit to another region of the first edge 544 of the scraper.

[0084] exist Figure 6 and Figure 7In the non-limiting embodiment shown, the adjustment structure 506 includes a number of adjustment devices 560. Each adjustment device 560 is associated with an adjustable portion 546 of the first edge of the scraper and is configured to move that adjustable portion of the first edge of the scraper between a first position and a second position. That is, in the exemplary embodiment, there are an equal number of adjustment devices 560 and adjustable portions 546 of the first edge of the scraper. Therefore, each adjustable portion 546 of the first edge of the scraper has an associated adjustment device 560. Figure 6 As shown in the best embodiment, the adjustment device 560 includes a number of elongated bodies 562, each elongated body having a movable connecting member 564. Figure 7 ).like Figure 7 As shown, each body 562 of the adjusting device includes a first end 570, a middle portion 572, and a second end 576. Each first end 570 of the adjusting device body is configured to engage an associated scraper segment 550. In an exemplary embodiment, each first end 570 of the adjusting device body is generally conical and tapers at an angle substantially similar to the angle between the lower surface 520 and the upper surface 522 of the mounting member. Each middle portion 572 of the adjusting device body includes a threaded portion 578. As described below, the threaded portion 578 of the adjusting device body is a movable coupling 564. Each second end 576 of the adjusting device body includes an actuator, which, in an exemplary embodiment, is a coupling 580.

[0085] Furthermore, the mounting member 510 defines a number of elongated channels 590. In an exemplary embodiment, the channels 590 of the mounting member extend generally parallel to the lower surface 520 of the mounting member. Each channel 590 of the mounting member includes a threaded portion 592. The channels 590 of the mounting member correspond to the body 562 of the adjusting device, and the threaded portions 592 of the channels of the mounting member are configured to engage with the threaded portions 578 of the body of the adjusting device.

[0086] It is understood that embodiments including threaded elements 578, 592 are exemplary. In another, non-limiting embodiment (not shown), each body 562 of the adjusting device and each channel 590 of the mounting are generally smooth. In such an embodiment, each body 562 of the adjusting device is moved between positions by an actuator (not shown), such as, but not limited to, a DC servo motor (not shown). However, it will be understood that pneumatic actuator assemblies are employed in conjunction with other aspects and embodiments of the disclosed concept.

[0087] The ink application adjustment assembly 500 of the ink fountain is assembled as follows. A scraper 540 is disposed on the upper surface 522 of the mounting member, and the plane of the scraper 540 substantially corresponds to the plane of the upper surface 522 of the mounting member. A back plate 514 is disposed on the scraper 540, and a clamping plate 512 is disposed on the back plate 514. In an exemplary embodiment, the scraper 540, the back plate 514, and the clamping plate 512 are connected by fasteners (not shown) extending into the mounting member 510. Each adjustable portion 546 of the first edge of the scraper (i.e., each first edge 544 of the scraper segment) extends beyond the upper surface 522 of the mounting member. Further, an adjustment device 560 is disposed in a channel 590 of the mounting member, and each threaded portion 578 of the body of the adjustment device is threadedly connected to a threaded portion 592 of the channel of the mounting member. As described above, in an exemplary embodiment, there are an equal number of scraper segments 550 and adjustment devices 560. The mounting channel 590 is positioned such that each adjustment device 560 is approximately aligned with the scraper section 550.

[0088] In this configuration, when the scraper 540 and / or scraper section 550 are positioned in a plane substantially parallel to the upper surface 522 of the mounting member, the adjustable portions 546 of the first edge of the scraper are in their first positions. That is, when each adjustable portion 546 of the first edge of the scraper is in the first position, the entire scraper body 542 is substantially parallel to the upper surface 522 of the mounting member. Each adjusting device 560 is moved to a position, for example, rotated such that the threaded coupling longitudinally advances the adjusting device 560 until the first end 570 of the adjusting device body contacts and engages the adjustable portion 546 of the first edge of the scraper. Further longitudinal movement of the adjusting device 560 toward the adjustable portion 546 of the first edge of the scraper causes the first end 570 of the adjusting device body to engage the associated adjustable portion 546 of the first edge of the scraper and move it toward a second position.

[0089] In other words, the ink fountain 202 and the ink application adjustment assembly 500 are positioned such that the adjustable portion 546 of the first edge of the scraper is spaced apart from the outer surface of the ink fountain roller 204 when in the first position. When the adjustment device 560 moves longitudinally toward the scraper 540, the engagement of the adjustment device 560 with the associated adjustable portion 546 of the first edge of the scraper causes the adjustable portion 546 of the first edge of the scraper to move toward a second position and then into the second position. It is understood that the advancement of the adjustment device 560 can stop at any position between the first and second positions. It is understood that when the adjustable portion 546 of the first edge of the scraper is in the first position, the gap between the ink fountain roller 204 and the adjustable portion 546 of the first edge of the scraper is larger than when the adjustable portion 546 of the first edge of the scraper is in the second position. Therefore, the thickness of the ink 400 film applied to the ink fountain roller 204 is relatively thick compared to the thickness of the ink 400 film applied to the ink fountain roller 204 when the adjustable portion 546 of the first edge of the scraper is in the second position.

[0090] Furthermore, as described above, the ink guide roller 208 reciprocates between two positions, a first position and a second position. In the first position, the ink guide roller 208 engages the ink fountain roller 204, thereby causing ink to be transferred from the ink fountain roller 204 to the ink guide roller 208, and the ink guide roller 208 is spaced apart from the distribution roller 206. In the second position, the ink guide roller 208 is spaced apart from the ink fountain roller 204, and the ink guide roller 208 engages the distribution roller 206, thereby causing ink to be transferred from the ink guide roller 208 to the distribution roller 206. The period of this reciprocating motion is the "duty cycle" as defined above. It can be understood that the longer the duty cycle, the closer the duty cycle is to a 1:1 ratio, and the more ink 400 is transferred to the ink guide roller 208.

[0091] Furthermore, as described above, the duty cycle adjustment component 209 (in Figure 4 (As shown in the diagram) is configured to and does change the duty cycle of the ink guide roller 208. That is, the duty cycle adjustment component 209 is configured to and does change the length of time the ink guide roller 208 engages with the ink fountain roller 204. Therefore, the duty cycle adjustment component 209 is also configured to and does change the amount of ink transferred between the ink fountain roller 204 and the distribution roller 206.

[0092] Therefore, as described above, the ink application adjustment component 500 and the duty cycle adjustment component 209 are configured to change / limit the amount of ink supplied to or applied to the downstream rollers of the ink column 402 and the printing plate 224.

[0093] Furthermore, it can be understood that each ink station assembly 200 applies a monochrome ink image to the blanket roller 112 and / or the image transfer section 114. As is known in the art, the individual ink images must be substantially “registered” relative to each other. As used herein, “registration” of an “ink image” means that each ink image is substantially properly positioned relative to other ink images such that the multiple ink images form a master image. It can also be understood that each printing plate roller 222 (and / or its elements) must be positioned to ensure that the ink images are properly registered. To achieve this, each printing plate roller assembly 221 includes the elements described above and as follows: Figure 3 The axial adjustment assembly 226 and circumferential adjustment assembly 228 of the printing plate roller are schematically shown.

[0094] Furthermore, each ink image, master image, and / or tank-applied image must have proper side registration and circumferential registration. (Reference) Figure 3 The axial adjustment assembly 226 is configured to move the printing plate cylinder 222 axially relative to the axis of rotation of the printing plate cylinder 222. In other words, the axial adjustment assembly 226 is configured to and does indeed alter the lateral registration of the main image. Specifically, when the axial position of each ink image is axially moved (while simultaneously performing appropriate lateral registration with other ink images), the position of the main image is axially moved relative to the container on which the main image is applied.

[0095] In an exemplary, non-limiting embodiment, the axial adjustment assembly 226 includes a mounting member 227 and an actuator 229, both of which are in... Figure 3 The diagram is shown in simplified form. The mounting 227 of the axial adjustment assembly is configured and rotatably supports the printing plate cylinder 222 (and / or the shaft of the printing plate cylinder 222 (not indicated by reference numerals)). The mounting 227 of the axial adjustment assembly is movably coupled to the printing unit frame assembly 22. The actuator 229 of the axial adjustment assembly is configured to move the mounting 227 of the axial adjustment assembly relative to the printing unit frame assembly 22, causing the printing plate cylinder 222 to move in the axial direction. It is understood that when the printing plate cylinder 222 moves in the axial direction, the position of the ink image (and / or the main image) changes on the blanket roller 112 and / or the image transfer section 114. This change in position of the ink image (and / or the main image) on the blanket roller 112 and / or the image transfer section 114 changes the position of the image applied by the cylinder to the cylinder 300 ( Figure 2 The position of the image applied to the tank is 300 ( ). That is, the image applied to the tank is located on the tank body. Figure 2 The position on the tank is 300 ( Figure 2 The axial adjustment component 226 moves along the axial direction. In other words, the lateral registration of the image applied to the tank is changed by the axial adjustment component 226. Therefore, the axial adjustment component 226 is configured to and does indeed change the lateral registration of the image applied to the tank.

[0096] Also there Figure 3 As schematically shown, the circumferential adjustment assembly 228 is configured to change the circumferential registration of the image applied by the printing cylinder. As described above, and as is known in the art, the circumferential adjustment assembly 228 includes a bearing on the shaft of the printing cylinder, the bearing being driven by a helical gear (not shown) mounted to the shaft. The printing cylinder gear (not shown) is driven by a larger gear (not shown) mounted on the blanket wheel. This is also a helical gear. The helical gear of the printing cylinder is rotatably keyed to the shaft, but allows axial movement on the shaft. A linear helical mechanism (not shown) is used to move the helical gear axially on the shaft during machine operation. The axial movement of the printing cylinder gear causes the shaft to rotatably advance or delay its timing proportional to the helix angle of the gear. This advances or delays the position of the ink image for that particular color on the blanket. These elements are composed of Figure 3 The housing 228 is generally and schematically represented. The circumferential adjustment assembly 228 further includes an actuator 233 (schematically shown) which is configured to and actually actuates a linear helical mechanism.

[0097] The can decorating machine 100 and / or ink application system 104 also include an image control system 600 (in Figure 2 (Illustrated schematically). The image control system 600 is configured to automatically adjust the ink image of each ink station assembly 200 and the main image applied to the blanket roller 112 and / or image transfer section 114. In other words, the image control system 600 is configured to automatically adjust the thickness of the ink 400 in the ink column 402 and the side registration and circumferential registration of each ink image and / or main image.

[0098] In an exemplary embodiment, the can decoration machine 100 also includes a printing plate roller pressure regulating assembly 700. Figure 8 This is a perspective view of a printing plate roller pressure regulating assembly 700 that is operatively connected to the printing roller assembly 221. Figure 9 This is an exploded view of the printing plate roller pressure regulating assembly 700. Figure 10 This is a top view of the printing plate roller pressure adjustment assembly 700, and Figure 11 This is a top view of the printing plate roller pressure adjustment assembly 700, shown in partial cross-section, to illustrate the worm gear drive mechanism. Figure 12 This is a perspective view of the printing plate roller assembly 221 and the rubber blanket roller 112.

[0099] The printing plate roller assembly 221 includes a printing plate roller drive shaft 221. Rotation of the printing plate roller drive shaft 240 causes the printing plate 224 (…) to rotate. Figure 3 The printing plate roller drive shaft 240 is driven by the printing plate roller drive gear 241.

[0100] The printing plate roller adjustment assembly 700 includes an actuator, such as, but not limited to, a pneumatic motor 701, operably coupled to a worm gear 702, such that operation of the pneumatic motor 701 causes rotation of the worm gear 702. The worm gear 702 is operably coupled to an elongated member, such as, but not limited to, a screw thread assembly 703, such that rotation of the worm gear 702 causes movement of the screw thread assembly 703 via an eccentric pivot 707. The screw thread assembly 703 is operably coupled to an eccentric bushing 242 via an eccentric bushing bracket 243, such that movement of the screw thread assembly 703 causes corresponding movement of the eccentric bushing 242. The eccentric bushing 242 is disposed around the printing plate roller drive shaft 240 of the printing plate roller assembly 221. The eccentric bushing 242 has an eccentric shape such that rotation of the eccentric bushing 242 will cause the printing plate roller drive shaft 240 and thus the printing plate 224 (… Figure 3 The eccentric bushing 242 moves toward or away from the blanket roller 112. In an exemplary embodiment, the inner circumference of the eccentric bushing 242 has an eccentric shape, which causes the printing plate roller drive shaft 240 to move toward or away from the blanket roller 112 as the eccentric bushing 242 rotates. In this way, the pressure of the printing plate 224 on the blanket roller 112 can be increased by moving the printing plate roller drive shaft 240 toward the blanket roller 112 and decreased by moving the printing plate roller drive shaft 240 away from the blanket roller 112.

[0101] Figure 11 The exemplary embodiment of the worm gear drive mechanism is shown in more detail below. The worm gear drive mechanism includes a worm gear drive shaft 715 and a worm gear drive gear 714 coupled to the worm gear drive shaft 715. The worm gear drive gear 714 includes teeth corresponding to the teeth of the worm gear 702. Operation of the pneumatic motor 701 causes linear movement of the drive shaft 715. When the drive shaft 715 moves linearly, the teeth of the worm gear drive gear 714 interact with the teeth of the worm gear 702 to cause the worm gear 702 to rotate.

[0102] Worm gear 702 is connected to eccentric pivot 707 (in Figure 9 (Best shown in the diagram). Therefore, the rotation of the worm gear 702 causes the rotation of the eccentric pivot 707. The eccentric pivot 707 has an eccentric shape and is coupled to the threaded assembly 703, such that the rotation of the eccentric pivot 707 causes the threaded assembly 703 to move. Since the threaded assembly 703 is coupled to the eccentric bushing support 243, this movement also causes the eccentric bushing 242 to rotate about the printing plate roller drive shaft 240. In this way, the rotation of the eccentric bushing 242, and therefore the pressure of the printing plate 224 on the blanket roller 112, can be precisely controlled by the operation of the pneumatic motor 701.

[0103] The worm gear drive mechanism, worm gear 702, eccentric pivot 707 and screw thread assembly 703 together can be considered as a drive mechanism connected between pneumatic motor 701 and eccentric bushing 242, and the operation of pneumatic motor 701 causes the drive mechanism to rotate eccentric bushing 242.

[0104] In an exemplary embodiment, the printing plate roller pressure regulating assembly 700 includes a reducer assembly. As used herein, a "reducer assembly" refers to a structure that reduces the output motion produced by a pneumatic motor for a given amount of compressed air energy (e.g., but not limited to, measured in revolutions per minute, RPM). For example, if a given pneumatic motor uses an amount of compressed air energy of "X" to produce ten rotations in the output shaft, the "reducer assembly" converts that motion into a single rotation when the same pneumatic motor uses an amount of compressed air energy of "X". Further, in an exemplary embodiment, the "reducer assembly" is preceded by an indicator in the form of "[amount] X", which indicates the amount of reduction. For example, a "10X reducer assembly" is configured and does indeed reduce the output of the pneumatic motor by a factor of ten. That is, if a given pneumatic motor uses an amount of compressed air energy of "X" to cause the sliding element to move ten inches, the same pneumatic motor with a "10X reducer assembly" using an amount of compressed air energy of "X" will cause the sliding element to move one inch. The reducer assembly discussed herein is at least one of a 30X reducer assembly and a 101X reducer assembly in a non-limiting exemplary embodiment. Further, it will be understood that the disclosed concept preferably utilizes a combination of reducer assemblies. For example, but not limited to, in a non-limiting embodiment, the first reducer assembly may be a gearbox with a reduction ratio of 100:1, which is combined in series with a second reducer assembly, the second reducer assembly being a worm gear with a reduction ratio of 30:1X and a total ratio of 3000:1. In an exemplary embodiment, the worm gear 702 and the worm gear drive gear 714 may be used as the second reducer assembly, while the gearbox within the pneumatic motor 701 may be used as the first reducer assembly. However, it will be understood that additional or different reducer assemblies may be employed in the disclosed concept.

[0105] In an exemplary embodiment, the printing plate roller pressure regulating assembly 700 further includes a lower housing 711 and an upper housing 712. The lower housing 711 and the upper housing 712 are configured to be joined together to form a housing that accommodates the components of the printing plate roller pressure regulating assembly 700. The housing can be fixedly coupled to the fixing structure 244 of the can decorating machine 100 to securely fasten the printing plate roller regulating assembly 700 relative to the printing plate roller assembly 221.

[0106] In an exemplary embodiment, the sensor assembly can be used to determine the pressure on the printed circuit board. In an exemplary embodiment, the sensor assembly includes a sensor 704 coupled to the fixed structure 244 via a sensor holder 706. A sensor target 705 is coupled to an eccentric bushing holder 243. The sensor 704 is configured to sense the position of the sensor target 705. Since the sensor target 705 is coupled to the eccentric bushing holder 242, a change in the position of the sensor target 705 will correspond to a rotation of the eccentric bushing 242, which, as described above, corresponds to a change in pressure of the printed circuit board 224 on the blanket roller 112. The sensor 704 can be any suitable type of sensor, such as, but not limited to, a position sensor.

[0107] Figure 12 This is a perspective view of the printing plate roller assembly 221 and the rubber blanket roller 112 in an exemplary embodiment. Figure 12 As shown, the printing plate roller drive gear 241 and the printing plate 224 are located on opposite sides of the can decoration machine wall. The printing plate roller pressure regulating assembly 700 is in... Figure 12 It is hidden in the middle and can be set on the same side of the wall as the printing plate roller drive gear 241.

[0108] In an exemplary embodiment of the disclosed concept, the printing plate roller adjustment assembly 700 can be electronically controlled. Figure 13This is a schematic diagram of a control system for a printing plate roller adjustment assembly 700 according to an exemplary embodiment. The printing plate roller adjustment assembly 700 includes a plate pressure control system 716. The plate pressure control system 716 may include a controller, processor, circuitry, or any other suitable component for controlling a pneumatic motor 701. The plate pressure control system 716 receives input from a sensor 704 and controls the pneumatic motor 701. The plate pressure control system 716 may control the pneumatic motor 701 based on the output of the sensor 704 to achieve a desired pressure of the printing plate 224 on the blanket roller 112. The plate pressure control system 716 may also receive input or commands from an external control system 800. The input may be, for example, a desired pressure. The external control system 800 may be located at or away from the can decorating machine 100. In an exemplary embodiment, the external control system 800 is located remotely relative to the can decorating machine 100, thereby allowing, for example, remote pressure adjustment by a technician located at a distance. It will be understood that the external control system 800 may utilize wired or wireless communication to provide input or commands to the plate pressure control system 716. It will also be understood that the external control system 800 may utilize one or more networks, such as, but not limited to, the Internet or cellular communication networks, to provide inputs or commands to the plate pressure control system 716. In an exemplary embodiment, the external control system 800 may use one or more feedback mechanisms to determine the desired pressure. For example, but not limited to, the external control system 800 may use image data from a tank image to determine whether to increase or decrease the desired pressure.

[0109] In an example embodiment, the plate pressure system 716 may use one or more control algorithms to control the pneumatic motor 701 to regulate the pressure of the printed circuit board 224 on the blanket roller 112. For example, hysteresis can be a problem when regulating pressure. In an exemplary embodiment, the control algorithm reduces hysteresis. For example, the control algorithm may use fine incremental adjustments from only one direction to approach the desired pressure. That is, the control algorithm may increase the pressure incrementally in small, fine steps until the desired pressure is reached. As used herein, "fine" adjustment preferably means moving the element by less than 0.001 inches, more preferably less than 0.0005 inches. For example, if the pressure is below the desired pressure, the plate pressure control system 716 will control the pneumatic motor 701 to increase the pressure in fine incremental steps until the desired pressure is reached. If the pressure is above the desired pressure, or if the pressure regulation exceeds the desired pressure, the plate pressure control system 716 will first control the pneumatic motor 701 to reduce the pressure by a larger amount to bring the pressure below the desired pressure. Then, the plate pressure control system 716 will control the pneumatic motor 701 to gradually increase the pressure in small, fine steps until the desired pressure is reached. The process of gradually approaching the desired pressure in one direction with fine steps, such as small fine steps, reduces or eliminates hysteresis in the system.

[0110] In an exemplary embodiment, the can decorating machine 100 includes an image control system 600 (in... Figure 2 (As shown in the diagram). The image control system 600 includes an electronic can decorating machine control component 602, a mechanical can decorating machine control component 604, and a number of sensors 606. The electronic can decorating machine control component 602 includes programmable logic circuitry 610 and a number of modules 612. The electronic can decorating machine control component 602 is configured to determine whether the image applied to the can has an appropriate amount of ink and whether the ink image / main image is in the appropriate position. The image control system 600 may be part of or communicate with an external control system 800. However, it will be understood that in some exemplary embodiments, the image control system 600 may be omitted.

[0111] In an exemplary embodiment, module 612 of the electronic can decorating machine control component includes a database module 620 having decorated can image data and a comparison module 622. As used herein, "decorated can image data" refers to data representing the intended image. Further, the database module 620 of the electronic can decorating machine control component is configured to include a number of decorated can image datasets, and each decorated can image dataset is associated with a specific main image. That is, for example, one decorated can image dataset represents the main image of a can containing a cola beverage, while another decorated can image dataset represents the main image of a can containing a beer beverage. The comparison module 622 of the electronic can decorating machine control component is configured to compare an image signal with the associated can image data from the database module to determine whether the image signal is acceptable. As used herein, "acceptable" means that the image / ink image / main image applied to the can is substantially the intended image, as will be understood by those skilled in the art. For example, but not limited to, acceptable registration according to embodiments of the disclosed concept is preferably within about 0.001 inches of the intended image location, and more preferably within about 0.0005 inches of the intended image location. It will be understood that those skilled in the art are able to create, and indeed do create, can image data as representing an electronic structure of the intended image.

[0112] In an exemplary embodiment, the comparison module 622 of the electronic can decorator control assembly is configured to determine whether the image signal indicates that the can is being applied an image including either insufficient ink or excessive ink. As used herein, "insufficient ink" means that the amount of ink in the can-applied image / ink image / main image is less than the amount required to create the desired image, as will be understood by those skilled in the art. As used herein, "excessive ink" means that the amount of ink in the can-applied image / ink image / main image is greater than the amount required to create the desired image, as will be understood by those skilled in the art.

[0113] Furthermore, in an exemplary embodiment, the comparison module 622 of the electronic can decorating machine control assembly is configured to determine whether the image signal indicates that the can-applied image includes an axially offset image. As used herein, an "axially offset image" refers to an image / ink image / main image applied to the can that is not in the proper position. That is, an "axially offset image" does not have the expected side-mounted registration.

[0114] Furthermore, in an exemplary embodiment, the comparison module 622 of the electronic can decorating machine control assembly is configured to determine whether the image signal indicates that the can-applied image includes a circumferentially offset image. As used herein, a "circumferentially offset image" refers to an image / ink image / main image applied to the can that is not in the proper position. That is, a "circumferentially offset image" does not have the expected circumferential registration.

[0115] Further aspects of the comparison module 622 of the electronic can decorating machine control assembly will be discussed below after the mechanical can decorating machine control assembly 604 and a number of sensors 606.

[0116] The mechanical can decorating machine control assembly 604 is configured to be operatively coupled to at least one of the following: ink application adjustment assembly 500, duty cycle adjustment assembly 209 of the ink guide roller assembly, axial adjustment assembly 226 of the printing plate roller assembly, circumferential adjustment assembly 228 of the printing plate roller assembly, or printing plate roller pressure adjustment assembly 700. That is, typically, the mechanical can decorating machine control assembly 604 includes an actuator 650 (as used herein, reference numeral 650 indicates a general actuator or any actuator for the mechanical can decorating machine control assembly. Specific actuators are discussed below). The actuator 650 of the mechanical can decorating machine control assembly is configured to actuate the associated structure, namely, one of the ink application adjustment assembly 500, the duty cycle adjustment assembly 209 of the ink guide roller assembly, the axial adjustment assembly 226 of the printing plate roller assembly, the circumferential adjustment assembly 228 of the printing plate roller assembly, or the printing plate roller pressure adjustment assembly 700.

[0117] In an exemplary embodiment, the mechanical can decorating machine control assembly 604 includes at least one or a number of ink application adjustment assembly actuators 652. Figure 3 (Illustratively shown). Each ink application adjustment component actuator 652 is configured and is indeed operatively coupled to the adjustment device 560 of the ink application adjustment component. That is, each ink application adjustment component actuator 652 is configured and is indeed movable between a first position, a second position, and any intermediate position of the adjustment device 560 of the ink application adjustment component. In an exemplary embodiment, each ink application adjustment component actuator 652 is configured and is indeed operatively coupled to a coupling 580 at a second end of the body of the adjustment device.

[0118] In an exemplary embodiment, the mechanical can decorating machine control assembly 604 includes a number of ink guide roller assemblies with duty cycle adjustment actuators 654. Figure 3 (Illustratively shown). Each ink guide roller assembly duty cycle adjustment actuator 654 is configured and actually actuates the ink guide roller assembly duty cycle adjustment component to adjust the amount of ink applied to the printing plate cylinder assembly. That is, each ink guide roller assembly duty cycle adjustment actuator 654 is configured and actually actuates the duty cycle adjustment component 209 to change the duration for which the associated ink guide roller 208 engages the ink fountain roller 204.

[0119] In an exemplary, non-limiting embodiment, the mechanical can decorating machine control assembly 604 includes a number of printing plate roller assembly axial adjustment assembly actuators 656. Figure 3 (Illustratively shown). In an exemplary, non-limiting embodiment, each axial adjustment component actuator 656 of the printing plate roller assembly is configured and indeed operatively coupled to the axial adjustment component 226. In another exemplary, non-limiting embodiment, each axial adjustment component actuator 656 of the printing plate roller assembly is an actuator 229 of the axial adjustment component mount. That is, as used herein, the actuator 229 of the axial adjustment component mount is part of both the axial adjustment component 226 and the mechanical can decorator control assembly 604.

[0120] In an exemplary, non-limiting embodiment, the mechanical can decorating machine control assembly 604 includes a number of printing plate roller assembly circumferential adjustment assembly actuators 658. Figure 3 (Illustratively shown). Each circumferential adjustment component actuator 658 of the printing plate roller assembly is configured and indeed operatively coupled to the circumferential adjustment component 228. In another exemplary, non-limiting embodiment, each circumferential adjustment component actuator 658 is an actuator 233 of the circumferential adjustment component. That is, as used herein, the actuator 233 of the circumferential adjustment component is part of both the circumferential adjustment component 228 and the mechanical can decorating machine control component 604.

[0121] In an exemplary, non-limiting embodiment, the mechanical can decorating machine control assembly 604 includes a number of printing plate roller pressure regulating assembly actuators. For example, but not limited to, the mechanical can decorating machine control assembly 604 may include a pneumatic motor 701 of the printing plate roller pressure regulating assembly 700.

[0122] In an exemplary, non-limiting embodiment, a number, multiple, or all of the mechanical can decorating machine control component actuators 650 include a pneumatic motor 670. Figure 2(Illustrative illustration). As used herein, a "pneumatic motor" refers to a structure that expands compressed gas and converts the energy of compressed air into mechanical work through linear motion, rotational motion, or any other motion. As is known, the area in which the can decorating machine 100 operates is typically filled with ink particles, including airborne particles. Therefore, in some cases, operating a motor that produces a flame or spark that can ignite the airborne particles is dangerous. Therefore, as used herein, "pneumatic motor" further excludes any type of motor that utilizes combustion or generates / uses electricity. That is, a motor that utilizes combustion or generates / uses electricity is not "pneumatic motor" or its equivalent.

[0123] In an exemplary, non-limiting embodiment, a number of sensors 606 include a number of image sensors. As used herein, an "image" sensor refers to a sensor configured to convert an image into data, which includes a signal containing data representing features of the can-applied image / ink image / main image. In a non-limiting exemplary embodiment, the image sensor is a digital camera. In an exemplary embodiment, the image sensor is disposed adjacent to the path of the can 300 on the can transport assembly 102. Each sensor 606, i.e., each image sensor / digital camera, is configured to generate an image signal including data representing features of the can-applied image. In an exemplary embodiment, the image signal includes data representing the thickness of the can-applied image / ink image / main image, i.e., ink thickness feature data. In an exemplary embodiment, the image signal includes data representing the lateral registration of the can-applied image / ink image / main image, i.e., lateral registration feature data. In an exemplary embodiment, the image signal includes data representing the circumferential registration of the can-applied image / ink image / main image, i.e., circumferential registration feature data. Furthermore, each sensor 606, i.e. each image sensor / digital camera, is configured to transmit image signals to the electronic can decorator control assembly 602.

[0124] Therefore, the electronic can decorating machine control component 602 is configured to receive image signals from a number of sensors 606. Further, the electronic can decorating machine control component 602, specifically its comparison module 622, is configured to compare the image signals (i.e., data representing image feature data incorporated into the signal) with associated can image data from the database module 620 to determine whether the image signal is acceptable. That is, for example, the comparison module 622 is configured to determine whether the image signal indicates that the can has been applied an image / ink image / main image with either insufficient or excessive ink. In other words, the comparison module 622 is configured to compare ink thickness feature data with records of acceptable ink thickness in the database module 620 of the electronic can decorating machine control component.

[0125] Further, or alternatively, the comparison module 622 of the electronic can decorating machine control assembly is configured to determine whether the image signal indicates that the can is applying an image / ink image / main image including an axial offset image. Further, or alternatively, the comparison module 622 of the electronic can decorating machine control assembly is configured to and does indeed determine whether the image signal indicates that the can is applying an image including a circumferential offset image.

[0126] If the can application image / ink image / main image is unacceptable, the image control system 600, i.e., the electronic can decorator control assembly 602, is configured to send a correction signal to a selected element of the mechanical can decorator control assembly 604 to adjust at least one of the following: the ink application adjustment assembly 500 of the ink fountain, the duty cycle adjustment assembly 209 of the guide roller assembly, the axial adjustment assembly 226 of the printing plate roller assembly, the circumferential adjustment assembly 228 of the printing plate roller assembly, or the printing plate roller pressure adjustment assembly 700. For example, if the comparison module 622 of the electronic can decorator control assembly determines that the can application image includes either insufficient ink or excessive ink, the electronic can decorator control assembly 602 is configured to actuate the mechanical can decorator control assembly 604 to further actuate at least one of the ink application adjustment assembly 500 of the ink fountain, the duty cycle adjustment assembly 209 of the guide roller assembly, or the printing plate roller pressure adjustment assembly 700, thereby adjusting the amount of ink applied to the printing plate roller assembly and / or the blanket roller. As another example, if the comparison module 622 of the electronic can decorating machine control assembly determines that the can applied image includes an axially offset image, then the electronic can decorating machine control assembly 602 is configured to actuate the mechanical can decorating machine control assembly 604 to further actuate the axial adjustment assembly 226 of the printing plate roller assembly, thereby adjusting the axial position of the can applied image. As another example, if the comparison module 622 of the electronic can decorating machine control assembly determines that the can applied image includes a circumferentially offset image, then the electronic can decorating machine control assembly 602 is configured to actuate the mechanical can decorating machine control assembly 604 to further actuate the circumferential adjustment assembly 228 of the printing plate roller assembly, thereby adjusting the circumferential position of the can applied image.

[0127] It will be understood that, in some exemplary embodiments, the image control system 600 may be omitted. In exemplary embodiments, the external control system 800 may remotely control one or more of the following: ink application adjustment assembly 500, duty cycle adjustment assembly 209 of the ink guide roller assembly, axial adjustment assembly 226 of the printing plate roller assembly, circumferential adjustment assembly 228 of the printing plate roller assembly, or printing plate roller pressure adjustment assembly 700.

[0128] Therefore, the disclosed concept provides automation and control for many inspection and adjustment operations that have historically required manual operation. Furthermore, the accuracy provided by the disclosed concept (even if not completely eliminated) substantially reduces waste tanks and production losses caused by image quality defects.

[0129] While specific embodiments of the invention have been described in detail, those skilled in the art will understand that various modifications and alternatives to those details can be developed based on the general teachings of this disclosure. Therefore, the specific arrangements disclosed are merely illustrative and not intended to limit the scope of the disclosed concept, which will be defined by the full scope of the appended claims and any and all their equivalents.

Claims

1. A printing plate pressure regulating system for a can decorating machine, the can decorating machine comprising a printing plate roller assembly having a printing plate roller drive shaft and a rubber blanket roller, the printing plate pressure regulating system comprising: Actuator; A control system configured to control the operation of the actuator to regulate the pressure between the printing plate roller assembly and the blanket roller; An eccentric bushing, the eccentric bushing being disposed around the printing plate roller drive shaft, wherein rotation of the eccentric bushing causes the printing plate roller to move toward or away from the blanket roller; and A drive mechanism is connected between the actuator and the eccentric bushing, wherein operation of the actuator causes the drive mechanism to rotate the eccentric bushing. The drive mechanism includes: A worm gear, the worm gear being configured to rotate in response to operation of the actuator; An eccentric pivot, operably coupled to the worm gear and configured to rotate with the rotation of the worm gear; and An elongated member is connected between the eccentric pivot and the eccentric bushing, wherein the elongated member is configured to rotate the eccentric bushing in response to rotation of the eccentric pivot.

2. The printing plate pressure regulating system as described in claim 1, wherein, The actuator is a pneumatic motor.

3. The printing plate pressure regulating system as described in claim 1, further comprising: An eccentric bushing support is provided, which connects the eccentric bushing and the elongated member.

4. The printing plate pressure regulating system as described in claim 1, wherein, The drive mechanism also includes: A drive shaft, coupled to the actuator and configured to move linearly in response to operation of the actuator; and A worm gear drive gear is coupled to the drive shaft and configured to interact with the worm gear in response to linear movement of the drive shaft, causing the worm gear to rotate.

5. The printing plate pressure regulating system as described in claim 1, further comprising: A sensor target, which is coupled to the eccentric bushing and configured to move in conjunction with the rotation of the eccentric bushing; as well as A sensor, configured to sense the position of the sensor target. The control system is configured to control the operation of the actuator based on the output of the sensor.

6. The printing plate pressure regulating system as described in claim 5, wherein, The predetermined position of the sensor target corresponds to the desired pressure between the printing plate roller assembly and the blanket roller, and wherein the control system is configured to control the actuator such that the position of the sensor target is the predetermined position corresponding to the desired pressure between the printing plate roller assembly and the blanket roller.

7. The printing plate pressure regulating system as described in claim 6, wherein, The control system is configured to control the actuator so that the printing plate roller moves toward the blanket wheel in fine incremental steps until the position of the sensor target is the predetermined position corresponding to the desired pressure between the printing plate roller assembly and the blanket wheel.

8. The printing plate pressure regulating system as described in claim 7, wherein, The control system is configured to control the actuator such that the printing plate roller moves away from the blanket roller in large steps before moving toward the blanket roller in fine incremental steps, until the position of the sensor target is the predetermined position corresponding to the desired pressure between the printing plate roller assembly and the blanket roller.

9. The printed circuit board pressure regulating system as described in claim 1, further comprising: A housing configured to house the actuator and the drive mechanism, wherein the housing is configured to have a fixed position relative to the printing plate roller assembly.

10. The printing plate pressure regulating system as claimed in claim 1, wherein, The control system is configured to control the actuator based on inputs from an external control system.

11. The printing plate pressure regulating system as described in claim 10, wherein, The external control system is positioned away from the tank decoration machine.

12. A printing plate pressure regulating system for a can decorating machine, the can decorating machine comprising a printing plate roller assembly and a rubber blanket wheel, the printing plate roller assembly having a printing plate roller drive shaft and an eccentric bushing disposed around the printing plate roller drive shaft, wherein, The rotation of the eccentric bushing causes the printing plate roller to move toward or away from the blanket roller, and the printing plate pressure regulating system includes: Actuator; A drive mechanism, connected between the actuator and the eccentric bushing, the drive mechanism comprising: A worm gear, the worm gear being configured to rotate in response to the operation of the actuator; An eccentric pivot, operably coupled to the worm gear and configured to rotate with the rotation of the worm gear; and An elongated member is connected between the eccentric pivot and the eccentric bushing, wherein the elongated member is configured to rotate the eccentric bushing in response to rotation of the eccentric pivot.

13. The printing plate pressure regulating system as described in claim 12, wherein, The actuator is a pneumatic motor.

14. The printing plate pressure regulating system as described in claim 12, wherein, The drive mechanism also includes: A drive shaft, coupled to the actuator and configured to move linearly in response to operation of the actuator; and A worm gear drive gear is coupled to the drive shaft and configured to interact with the worm gear in response to linear movement of the drive shaft, causing the worm gear to rotate.

15. A can decorating machine, comprising: Rubber cloth wheel; A printing plate roller assembly having a printing plate roller drive shaft and an eccentric bushing disposed around the printing plate roller drive shaft, wherein rotation of the eccentric bushing causes the printing plate roller to move toward or away from the blanket roller; and Printed plate pressure regulating assembly, the printed plate pressure regulating assembly comprising: Actuator; A control system configured to control the operation of the actuator to adjust the pressure between the printing plate roller assembly and the blanket roller; and A drive mechanism is connected between the actuator and the eccentric bushing, wherein operation of the actuator causes the drive mechanism to rotate the eccentric bushing. The drive mechanism includes: A worm gear, the worm gear being configured to rotate in response to the operation of the actuator; An eccentric pivot, operably coupled to the worm gear and configured to rotate with the rotation of the worm gear; and An elongated member is connected between the eccentric pivot and the eccentric bushing, wherein the elongated member is configured to rotate the eccentric bushing in response to rotation of the eccentric pivot.

16. The can decorating machine as described in claim 15, wherein, The actuator is a pneumatic motor.

17. The can decorating machine as described in claim 15, wherein, The drive mechanism also includes: A drive shaft, coupled to the actuator and configured to move linearly in response to operation of the actuator; and A worm gear drive gear is coupled to the drive shaft and configured to interact with the worm gear in response to linear movement of the drive shaft, causing the worm gear to rotate.

18. The can decorating machine as described in claim 15, further comprising: A sensor target, which is coupled to the eccentric bushing and configured to move in conjunction with the rotation of the eccentric bushing; as well as A sensor, configured to sense the position of the sensor target. The control system is configured to control the operation of the actuator based on the output of the sensor.

19. The can decorating machine as described in claim 18, wherein, The predetermined position of the sensor target corresponds to the desired pressure between the printing plate roller assembly and the blanket roller, and wherein the control system is configured to control the actuator such that the position of the sensor target is the predetermined position corresponding to the desired pressure between the printing plate roller assembly and the blanket roller.

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