Stations used to form heat seals in envelopes

Abstract

The station for sealing the envelope includes a spacer, a positioning surface, and an envelope support surface configured to support the envelope. The sealing mechanism includes a sealing member configured to apply heat and pressure to a sealable member on the envelope to form a closed seal. The spacer and positioning surface are configured to align the sealable member with the sealing member when the envelope rests on the envelope support surface.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to U.S. Provisional Application No. 63 / 603,906, filed November 29, 2023, the disclosure of which is incorporated herein by reference in its entirety. Background Technology

[0003] Small to medium-sized items are typically mailed or transported in sealed envelopes. In many applications, the envelope includes a sealable component that is activated by applying heat and pressure once the envelope has been loaded. The heat-activated sealable component, upon cooling, forms a closed seal that keeps the envelope closed until the recipient opens it to remove its contents.

[0004] Shipping envelopes used in e-commerce and other business applications are typically supplied in the form of interconnected envelope webs. These webs are designed for use with automated packaging machines (or bagging machines), which advance the webs, open the envelopes to be loaded, apply heat and pressure to the sealable components after the envelopes have been loaded, and separate the sealed envelopes from the webs. Typical automated bagging machines are relatively large, and if the size of the envelopes to be loaded is changed, the envelope webs being supplied to the bagging machine need to be replaced, and the bagging machine may need to be reconfigured. Summary of the Invention

[0005] In one aspect of the disclosed technology, a station for sealing a sleeve includes a sealing mechanism having a first sealing member and a second sealing member, the first and second sealing members being configured to apply heat and pressure to a sealable member when a sealable member on the sleeve is disposed between the first and second sealing members. The heat and pressure are sufficient to activate the sealable member and form a closed seal within the sleeve. The station also includes a spacer configured to position the first and second sealing members at a predetermined first distance from a positioning surface, the predetermined first distance corresponding to the spacing between the closed bottom of the sleeve and the sealable member, so as to align the sealable member with the first and second sealing members when the sleeve is positioned against the positioning surface. The station also includes a lateral guide configured and positioned relative to the sealing mechanism and the spacer to laterally guide and orient the sleeve into contact with the positioning surface.

[0006] In another aspect of the disclosed technology, the lateral guide includes a sidewall configured to center the envelope relative to the first sealing member and the second sealing member.

[0007] In another aspect of the disclosed technology, the positioning surface includes a cover support surface configured to support the cover.

[0008] In another aspect of the disclosed technology, the station also includes shelves that include spacers and positioning surfaces.

[0009] In another aspect of the disclosed technology, the sidewall slopes inward and downward.

[0010] In another aspect of the disclosed technology, the sidewall is a first sidewall, and the lateral guide also includes a second sidewall. The lateral guide is configured such that the spacing between the first sidewall and the second sidewall is variable.

[0011] In another aspect of the disclosed technology, the shelf is also configured such that the height of the shelf surface relative to the first sealing member and the second sealing member is adjustable so that the sealable member is aligned with the first sealing member and the second sealing member when the cover is placed on the surface of the shelf.

[0012] In another aspect of the disclosed technology, the shelf is configured to tilt between a first angular orientation position and a second angular orientation position, in which the surface of the shelf supports a cover, and in the second angular orientation position, the cover can fall off the shelf.

[0013] In another aspect of the disclosed technology, the shelf includes a lip and a rear portion connected to the lip. A positioning surface includes an upper surface of the lip, and the spacer includes the rear portion. The upper surface of the lip is configured to engage with the bottom edge of the sleeve.

[0014] In another aspect of the disclosed technology, the main surface of the rear portion is configured to engage the wall of the envelope, and the main surface of the rear portion is at an angle relative to the vertical direction.

[0015] In another aspect of the disclosed technology, the station also includes an actuator mechanism configured to move the first sealing member between a first position and a second position.

[0016] In another aspect of the disclosed technology, the first sealing member is also configured to push the cover into the second sealing member when the first sealing member is in the second position of the first sealing member, so that the sealable member is squeezed and compressed.

[0017] In another aspect of the disclosed technology, the station also includes a base, and shelves and sealing mechanisms are mounted on the base.

[0018] In another aspect of the disclosed technology, the station also includes a column mounted on a base. Shelves are mounted on the column, and the column is configured to provide lifting support relative to the sealing mechanism.

[0019] In another aspect of the disclosed technology, the base includes a plurality of legs and a platform connected to and supported by the legs. At least one of a sealing mechanism and a shelf is mounted on the platform.

[0020] In another aspect of the disclosed technology, the platform is a first platform, and the station also includes a second platform, which is connected to and supported by the legs and positioned below the first platform.

[0021] In another aspect of the disclosed technology, the sealing mechanism is mounted on the first platform and the shelf is mounted on the second platform.

[0022] In another aspect of the disclosed technology, the second platform has an opening therein. This opening is located below the shelf and aligned with the shelf.

[0023] In another aspect of the disclosed technology, a packaging and conveying system includes at least one of the aforementioned station, a conveyor, and a container, configured to be positioned below an opening in a second platform and to receive a sleeve through that opening. In another aspect of the disclosed technology, a station for sealing a sleeve includes a sealing mechanism having a first sealing member and a second sealing member, the first and second sealing members being configured to apply heat and pressure to a sealable member when a sealable member on the sleeve is disposed between the first and second sealing members. The heat and pressure are sufficient to activate the sealable member and form a closed seal in the sleeve. The station also includes a spacer configured to position the first and second sealing members at a predetermined first distance from a positioning surface, the predetermined first distance corresponding to the spacing between the closed bottom of the sleeve and the sealable member, so as to align the sealable member with the first and second sealing members when the sleeve is positioned against the positioning surface. The station also includes a cover. An opening is formed in the cover. This opening is located above a shelf and is configured to allow manual lifting and removal of the sleeve from the positioning surface.

[0024] In another aspect of the disclosed technology, the positioning surface includes a cover support surface configured to support the cover.

[0025] In another aspect of the disclosed technology, the station also includes shelves, and the shelves include spacers and positioning surfaces.

[0026] In another aspect of the disclosed technology, the opening is configured to allow the envelope to be manually lowered onto the shelf.

[0027] In another aspect of the disclosed technology, the opening is configured to center the envelope relative to the first sealing member and the second sealing member.

[0028] In another aspect of the disclosed technology, the cover includes a planar upper surface.

[0029] In another aspect of the disclosed technology, the shelf is configured such that when the cover is supported by the shelf, the upper end of the cover is raised above the upper surface.

[0030] In another aspect of the disclosed technology, the upper surface is configured to facilitate loading of the envelope while it is resting on the upper surface.

[0031] In another aspect of the disclosed technology, the width of the upper surface is at least about two feet and the depth is at least about two feet.

[0032] In another aspect of the disclosed technology, the width of the upper surface is between about two feet and about five feet, and the depth is between about two feet and about five feet.

[0033] In another aspect of the disclosed technology, the upper surface of the cover is the topmost surface of the station.

[0034] In another aspect of the disclosed technology, the station also includes a base. Supports, sealing mechanisms, and covers are mounted on the base.

[0035] In another aspect of the disclosed technology, the base is configured to support the station from the support surface and to raise the upper surface to about two to about five feet above the support surface.

[0036] In another aspect of the disclosed technology, a packaging system includes a plurality of sleeves that are not connected to each other, each sleeve having a first flexible wall and a second flexible wall covering the first flexible wall and fixed to the first flexible wall for at least a portion around a bag boundary. The bag boundary encloses a bag defined between the first and second flexible walls and is configured and sized to accommodate articles. At least one of the first and second flexible walls defines a bag opening that allows access to the bag from outside the sleeve for loading articles into the bag. Each sleeve also has a sealable member disposed on the first wall and configured to form a closure seal that secures the first wall to the second wall at the bag opening to seal the bag closed.

[0037] The packaging system also includes a sealing station comprising a sealing mechanism having a first sealing member and a second sealing member, the first and second sealing members being configured to apply heat and pressure to the sealable member when a corresponding sealable member on each of the envelopes is positioned between the first and second sealing members. The heat and pressure are sufficient to activate the sealable member and form a closed seal. The station also includes a spacer configured to position the first and second sealing members at a predetermined first distance from a positioning surface, the predetermined first distance corresponding to the spacing between the closed bottom of the envelope and the sealable member, so as to align the sealable member with the first and second sealing members when the envelope is positioned against the positioning surface.

[0038] In another aspect of the disclosed technology, the positioning surface includes a cover support surface configured to support the cover.

[0039] In another aspect of the disclosed technology, the station also includes shelves, and the shelves include spacers and positioning surfaces.

[0040] In another aspect of the disclosed technology, the shelf is configured to support the lower edge of the cover, and the distance between the lower edge of the cover and the sealable member of the cover is approximately equal to the distance between the surface of the shelf and the first sealing member.

[0041] In another aspect of the disclosed technology, the first sealing member is a first sealing jaw, and the second sealing member is a second sealing jaw.

[0042] In another aspect of the disclosed technology, the sealable component includes a heat-activated material.

[0043] In another aspect of the disclosed technology, the heat-activated material is either a heat-sealable material or a hot melt adhesive.

[0044] In another aspect of the disclosed technology, at least one of the first sealing member and the second sealing member includes a heating element.

[0045] In another aspect of the disclosed technology, at least one of the first and second walls of the envelope comprises paper.

[0046] In another aspect of the disclosed technology, at least one of the first and second walls of the envelope comprises stretchable paper.

[0047] In another aspect of the disclosed technology, a method of sealing a sleeve includes: manually placing the sleeve on a positioning surface of a sealing station such that a sealable member on the sleeve is aligned with a sealing member of the sealing station; and applying heat and pressure to the sealable member using the sealing member. The heat and pressure are sufficient to activate the sealable member and form a closed seal within the sleeve. The method also includes removing the sealed sleeve from the positioning surface.

[0048] In another aspect of the disclosed technology, the method also includes lowering the envelope onto the positioning surface.

[0049] In another aspect of the disclosed technology, the method also includes lowering the envelope onto the positioning surface through an opening in the cover of the sealing station.

[0050] In another aspect of the disclosed technology, the method also includes lifting the envelope from the positioning surface.

[0051] In another aspect of the disclosed technology, the method also includes lifting the envelope from the positioning surface through an opening in the cover of the sealing station.

[0052] In another aspect of the disclosed technology, the method also includes reaching and grasping the envelope through an opening.

[0053] In another aspect of the disclosed technology, the method also includes adjusting the height of the positioning surface such that when the envelope is placed on the positioning surface, the sealable member is aligned with the sealing member.

[0054] In another aspect of the disclosed technology, the method further includes adjusting the vertical position of the positioning surface relative to the sealing member such that when the sash is placed on the positioning surface, the upper edge of the sash is above the opening in the cap.

[0055] In another aspect of the disclosed technology, the envelope is a first envelope, and the method further includes adjusting the vertical position of the positioning surface relative to the sealing member such that when the second envelope is placed on the positioning surface, the sealable member on the second envelope is aligned with the sealing member. The height of the second envelope differs from the height of the first envelope. The method further includes applying heat and pressure to the sealable member of the second envelope using the sealing member. The heat and pressure are sufficient to activate the sealable member of the second envelope and form a closed seal in the second envelope. The method further includes removing the sealed second envelope from the positioning surface.

[0056] In another aspect of the disclosed technology, a station for sealing a cover includes: a housing; and a sealing mechanism mounted on the housing and including a first sealing member and a second sealing member, the first and second sealing members being configured to apply heat and pressure to a sealable member when the sealable member on the cover is disposed between the first and second sealing members. The heat and pressure are sufficient to activate the sealable member and form a closed seal in the cover. The station also includes a support member configured to engage with the housing and support the housing from a support surface. The housing and sealing mechanism are configured such that the cover can rest on the support surface when the sealable member is disposed between the first and second sealing members. The support member is configured such that the position of the support member relative to the housing is variable, thereby facilitating adjustment of the height of the housing and sealing mechanism above the support surface so as to align the sealable member with the first and second sealing members when the cover rests on the support surface. Attached Figure Description

[0057] The following figures illustrate specific embodiments of this disclosure and therefore do not limit the scope of this disclosure. Embodiments of this disclosure will be described below in conjunction with the accompanying figures, wherein the same numerals denote the same elements.

[0058] The concept of the invention is described with reference to the accompanying drawings, wherein like reference numerals denote like parts and components in the various views. Several aspects of the inventive concept are described below with reference to exemplary applications. It should be understood that many specific details, relationships, and methods are set forth in order to provide a full understanding of the inventive concept. However, those skilled in the art will readily recognize that the inventive concept can be practiced without employing one or more of the specific details or with other methods. In other instances, well-known structures or operations have not been shown in detail so as not to obscure the inventive concept.

[0059] Figure 1 This is a top front perspective view of the station used to form a heat seal in the envelope, showing the sealing jaws of the station in the open position;

[0060] Figure 2 yes Figure 1 The top front perspective view of the station is shown. For clarity, the station's cover and front protective plate have been removed, and the sealing jaws are shown in the open position.

[0061] Figure 3 yes Figure 1 and Figure 2 The top view of the station is shown, in which the station's cover and front protective plate have been removed and the sealing jaws are shown in the open position;

[0062] Figure 4 yes Figure 1-3The top front perspective view of the station is shown, in which the station's cover and front protective plate have been removed and the sealing jaws are shown in the closed position.

[0063] Figure 5 yes Figure 1-4 The front view of the station shown;

[0064] Figure 6 yes Figure 1-6 The side view of the station shown illustrates the sealing jaws in the open position;

[0065] Figure 7 The envelope is before loading and during being Figure 1-6 Top front perspective view of the station before sealing;

[0066] Figure 8 yes Figure 7 The envelope shown is after loading and during being Figure 1-6 The top front perspective view of the station after sealing is shown;

[0067] Figure 9 yes Figure 1-6 The top front perspective view of an alternative embodiment of the station shown illustrates the station being mounted on a wall-mounted shelf;

[0068] Figure 10 yes Figure 1-6 A side sectional view of another alternative embodiment of the station shown, illustrating the station being placed on... Figure 9 On the wall-mounted shelf shown;

[0069] Figure 11 yes Figure 1-6 A top view of another alternative embodiment of the station shown;

[0070] Figure 12 yes Figure 1-6 A cross-sectional side view of another alternative embodiment of the station shown. Detailed Implementation

[0071] The concept of the invention is described with reference to the accompanying drawings, wherein the same reference numerals in several views represent the same parts and components. References to examples are used to illustrate several aspects of the inventive concept described below. It should be understood that numerous specific details, relationships, and methods are set forth in order to provide a comprehensive understanding of the inventive concept. However, those skilled in the art will readily recognize that the inventive concept can be practiced without one or more of the specific details or using other methods. In other instances, well-known structures or operations have not been shown in detail in order to avoid obscuring the inventive concept.

[0072] Figures 1 to 6A station 10 is shown for forming a heat seal in the envelope 120. The envelope 120 is configured to contain and hold the article 121 to be packaged, typically sealing the article 121, while the article 121 is being mailed, transported, or otherwise requires packaging in a closed container. Figure 4 , 7 One of the 120 covers is depicted in Figure 8. Figure 8 Item 121 is shown in dashed form.

[0073] Packaging containers can include parcel packaging and other containers that package articles. During the transport or storage of articles, packaging containers are configured to contain and hold the articles, typically enclosing them. Parcel packaging is configured for transporting and / or storing products, such as for warehouse storage or retail shelf and display. Examples of parcel packaging include flexible transport containers (such as sleeves), which can have varying degrees of flexibility and are typically used for transporting or mailing small or relatively flat articles, or even smaller articles whose sleeve walls can be fitted around them. Flexible transport containers (such as sleeves) can be padded or unpadded, can be made of materials such as paper and flexible cardboard, can be configured with or without side walls or folds, and can include larger sleeves (such as mailing bags). Examples of parcel packaging also include: bags (such as paper bags or polyethylene bags), which may be self-sealing and are typically used for transporting small to medium-sized items; boxes, which may be made of cardboard, hardboard, wood, or plastic and are typically rigid or semi-rigid structures suitable for holding medium to large and heavier items; and transport tubes or tubular mailing bags, which are typically used for transporting documents and paper items.

[0074] As used herein, the term “enclosure” is intended to cover, but is not limited to, flat shipping containers (including mailing bags) that are typically used to transport or send smaller items and are flexible enough to expand and bend around the item 121 when the item 121 is inserted into a bag within the envelope 120; and wherein the sidewalls or thickness of the container are significantly less than, for example, less than 1 / 100 (one percent) of the container width and / or height.

[0075] The following details of the envelope 120 are provided for illustrative purposes only. Station 10 can be used to seal envelopes with other configurations, including: envelopes with foldable flaps that cover an opening leading to an inner pocket of the envelope after the article 121 has been inserted into the envelope; and envelopes with double walls, with or without padding, insulation, and / or expandable material between the layers of the walls.

[0076] refer to Figure 7 and Figure 8The envelope 120 includes an envelope body comprising a wall 122 and an opposing wall 124. Walls 122 and 124 are formed of paper and define an internal receiving area or envelope 125 for receiving articles 121. The paper can be plain kraft paper, stretchable paper, or other types of paper. For example, in some applications, walls 122 and 124 may be made of kraft paper with a basis weight in the range of about 90 grams per square inch to about 130 grams per square inch. Alternatively, walls 122 and 124 may also be made of materials other than paper, such as plastic film.

[0077] The envelope 120 also includes two inter-wall seals 126 and 128. The inter-wall seals 126 and 128 are located in... Figure 7 The wall seals 126 and 128 are shown in dashed lines. The wall seals 126 and 128 can be constructed from adhesive elements in the form of an adhesive material. The wall seals 126 and 128 secure the walls 122 and 124 to each other and partially define the bag boundary of the envelope 125. (As can be seen in...) Figure 7 As seen, each inter-wall seal 126 is positioned along a corresponding side edge 127 of the sleeve 120 and extends continuously along the entire length of the side edge 127 in the longitudinal direction of the sleeve 120. Figure 7 The middle part is represented by the arrow "L".

[0078] The inter-wall seal 128 extends continuously along the bottom edge 129 of the sleeve 120 in the transverse direction (i.e., along a direction substantially perpendicular to the longitudinal direction) and intersects with the inter-wall seal 126. Figure 7 The horizontal direction is indicated by an arrow "T".

[0079] After walls 122 and 124 are secured to each other as described above, an opening 140 leading to the envelope 125 is defined. (The last sentence appears to be incomplete and possibly refers to a different product.) Figure 7 As seen, the opening 140 is located at the top of the sleeve 120 and allows the item to be packaged 121 to be inserted into the sleeve bag 125. More specifically, wall 124 covers wall 122 and is secured to wall 122 around at least a portion of the bag boundary defined by inter-wall seals 126, 128, wherein the bag boundary surrounds the sleeve bag 125 defined between walls 122, 124, and wherein at least one of walls 122, 124 defines the opening 140 when the sleeve 120 is in the position of... Figure 7 In the unsealed state shown, the opening allows access to the envelope bag 125 from the outside of the envelope 120 for placing the article 121 into the envelope bag 125.

[0080] refer to Figure 7A sealable member 130 is disposed on the inward-facing surface of wall 122 (i.e., on the surface of wall 122 facing wall 124) and near the upper end of wall 122. The sealable member 130 may be, for example, a heat-sealable material or hot melt adhesive, which, when heated and pressurized, forms a closed seal 132 that adheres wall 124 to wall 122. Thus, the closed seal 132 keeps opening 140 closed. Furthermore, the closed seal 132 forms another portion of the bag boundary, such that the bag boundary completely surrounds the envelope bag 125 to retain article 121 within the envelope bag 125. Figure 8 The figure shows a sealed portion 132, which is a loaded envelope 120 sealed via station 10. Thus, before the sealed portion 132 is formed, the envelope bag 125 is closed on three sides and open on the fourth side, which is also closed when the sealed portion 132 is formed.

[0081] In an alternative embodiment, the sealable member 130 may be disposed on wall 124. In other alternative embodiments, the sealable member 130 may be disposed on each of walls 122, 124.

[0082] The sealable member 130 is a heat-activated material. The heat-activated material that can form the sealable member 130 can be, for example, a heat-sealable material or hot melt adhesive, which, when heated and pressurized, forms a closed seal (not shown) that adheres wall 124 to wall 122. In alternative embodiments, the sealable member 130 can be a pressure-sensitive adhesive, cold glue, self-adhesive material, or other types of sealing material.

[0083] A heat seal can be formed between thermoplastic materials of the same or similar types by subjecting the materials to heat and pressure sufficient to weld them together. In the case of paper substrates being fixed to each other, a heat-sealable material can be applied to each of the substrates. When fixing the substrates, the heat-sealable material on one or both substrates is subjected to heat and pressure sufficient to weld the heat-sealable materials together, thereby fixing the paper substrates to each other.

[0084] Hot melt adhesives are thermoplastic polymers that are solid at room temperature, melt when heated to an activation temperature above their softening point, and re-solidify as heat dissipates at a temperature below their freezing point (which may be the same as or different from the activation temperature), thereby increasing their strength during re-solidification. Most hot melt adhesives do not undergo any chemical reactions such as crosslinking or carrier removal (e.g., moisture evaporation) when they melt into a molten state and re-solidify. Therefore, hot melt adhesives can generally be reactivated after initial application to a substrate, i.e., remelted and re-solidified.

[0085] Hot melt adhesives may be in a low-tack state after being applied to the surfaces to be bonded, in which they exhibit low or no tack within a lower temperature range. The hot melt adhesive is reactivatable. More specifically, the hot melt adhesive is applied under heat and then cooled and cured during the conversion process. The hot melt adhesive is reactivated by reheating it to an activation temperature within a lower temperature range. For example, in some embodiments, this lower application temperature range is below about 140°F. In other embodiments, for example, the lower temperature range is below about 120°F, below about 125°F, or below about 130°F.

[0086] The hot melt adhesive is heated to its activation temperature, causing it to melt. The hot melt adhesive is then cooled, and bonding pressure is applied to adhere it to the opposing surfaces, thereby forming a seal between these surfaces.

[0087] refer to Figure 1-6 Station 10 includes a base 12, a sealing mechanism 14, and an actuator mechanism 16. The sealing mechanism 14 and the actuator mechanism 16 are mounted on the base 12. Therefore, the base 12 supports the sealing mechanism 14 and the actuator mechanism 16 and raises the sealing mechanism 14 and the actuator mechanism 16 above the floor or other support surface where station 10 is located.

[0088] like Figure 3 As shown, when viewed from above, the base 12 has a generally rectangular configuration. The base 12 includes four legs 20, four lower transverse members 22, and four upper transverse members 24. Each lower transverse member 22 is generally horizontally oriented and connects to two corresponding legs 20 and extends between the two corresponding legs. Each upper transverse member 24 is also generally horizontally oriented and connects to two corresponding legs 20 and extends between the two corresponding legs.

[0089] The base 12 also includes a lower platform 26 and an upper platform 28. The lower platform 26 is supported by and connected to the lower transverse member 22, and is located near the corresponding lower end of the support leg 20. The lower platform 26 has an opening 30 formed therein, which is located near the front end of the lower platform 26. Figure 1 Arrow 31 in the diagram indicates the forward direction.

[0090] The upper platform 28 is supported by and connected to three transverse members in the upper transverse members 24, located near the respective upper ends of the outriggers 20. For example... Figure 3 As shown, the upper platform 28 is spaced apart from the front end of the base 12.

[0091] Specific details regarding the base 12 are provided for illustrative purposes only. In alternative embodiments, the base 12 may have other configurations. For example, alternative embodiments of the base 12 may have a square or other shape when viewed from above. Other alternative embodiments may include more or fewer four legs 20 and more or fewer eight transverse members 22, 24. Other alternative embodiments may include transverse members 22, 24 arranged in a non-horizontal orientation. In other alternative embodiments, the base 12 may be formed without legs 20 and / or without transverse members 22, 24. For example, in alternative embodiments, each side of the base 12 may be formed from a continuous sheet of metal, wood, or other suitable material.

[0092] Other alternative embodiments of station 10 may be configured without any base 12. In such embodiments, for example, station 10 may be placed on a table, stand, or other raised structure, or station 10 may be suspended from a wall or other surface.

[0093] refer to Figure 1 The station 10 also includes a front protective plate 40 and a cover 42. The front protective plate 40 has a generally vertical orientation. The front protective plate 40 extends between and is connected to two legs 20 located at the front end of the base 12 and is located near the respective upper ends of these legs 20.

[0094] The cover 42 has a generally horizontal orientation. The cover 42 is disposed on and connected to the respective upper end of the support leg 20. The cover 42 has a rectangular opening 44 formed therein, the rectangular opening being located near the front end of the cover 42. Alternative embodiments may omit one or both of the front guard plate 40 and the cover 42.

[0095] In addition to isolating the sealing mechanism 14 and actuator mechanism 16 from the user portion, the upper surface of the cover 42 can also serve as a working surface on which one or more covers 120 and one or more articles 114 can rest before, during, and after the user loads the covers 120. In some embodiments, the covers 120 can be arranged as one or more sections of covers mounted on a small door supported by the upper surface of the cover 42. Thus, the station 10 can serve as a standalone workstation that facilitates the loading and sealing of the covers 120. In some embodiments, the cover 42 can have: a width of at least about two feet or a lateral dimension; and a depth of at least about two feet or a front-back dimension. In other embodiments, the width of the cover 42 can be between about two feet and about five feet, and the depth can be between about two feet and about five feet. In alternative embodiments, the cover 42 can have other dimensions. In other embodiments, two or more sealing mechanisms 14 and two or more actuator mechanisms 16 can be mounted on a single base 12 to produce a multi-station workstation.

[0096] In some embodiments, the base 12 may be configured to raise the upper surface of the cover 42 to approximately two to five feet above the support surface on which the base 12 rests. In alternative embodiments, the base 12 may be configured to raise the upper surface of the cover 42 to other heights above the support surface.

[0097] The sealing mechanism 14 is configured to form a closed seal 132 within the envelope 120. For example... Figure 2-4 As shown, the sealing mechanism 14 includes a first sealing member in the form of a front sealing jaw 34 and a second sealing member in the form of an anvil or a rear sealing jaw 36. The actuator mechanism 16 is configured to move the front sealing jaw 34 horizontally toward and away from the rear sealing jaw 36, thereby applying heat and pressure to the sealable member 130 of the envelope 120, resulting in the formation of a closed seal 132 that seals the envelope bag 125 closed.

[0098] The front sealing jaw 34 and the rear sealing jaw 36 each include a corresponding heating element 50. In an alternative embodiment, only one of the front sealing jaw 34 and the rear sealing jaw 36 may be equipped with a heating element 50. The heating element 50 may be, for example, a heating wire. In an alternative embodiment, other types of heating technologies (e.g., radiant heating or heated air) may be used instead of a heating wire.

[0099] refer to Figure 2-3 The sealing mechanism 14 also includes a sealing guard 55 mounted to the rear sealing jaws 36. The sealing guard 55 is configured relative to the rear sealing jaws 36 and the heating element 50. Figure 3 The seal 55 is translated between the extended position and the retracted position (not shown). When the seal 55 is in the first position, the seal 55 partially surrounds and covers the heated surfaces of the heating element 50 and the rear sealing jaws 36 to help prevent unintentional contact between the operator or other personnel and the heated surfaces of the heating element 50 or the rear sealing jaws 36. The seal 55 is biased toward its extended position by a spring (not shown) or other suitable means.

[0100] The sealing guard 55 has a sealing guard slot (not shown) configured to provide a path to the sealable member 130 of the envelope 120, the heating element 50, and the heated surface of the rear sealing jaw 36. As the front sealing jaw 34 approaches its partially closed position, pushing the sealing guard 55 rearward, the sealing guard 55 is configured to move from its extended position to its retracted position. The retraction of the sealing guard 55 allows the front sealing jaw 34 to contact the sealable member 130 of the envelope 120 (exposed through the sealing guard slot) and pushes the sealable member 130 towards contact with the heated surface of the heating element 50 and the rear sealing jaw 36. The spring of the sealing guard 55 is weaker than the spring 52 of the rear sealing jaw 36, such that the sealing guard 55 begins to retract upon contact with the advancing front sealing jaw 34. In an alternative embodiment where the front sealing jaw 34 includes the heating element 50, the sealing guard 55 may be arranged in substantially the same manner. The sealing and protective element 55 can be provided in either the front sealing jaw 34 or the rear sealing jaw 36, or both the front sealing jaw 34 and the rear sealing jaw 36.

[0101] The details provided above regarding the sealing element 55 are for illustrative purposes only. In alternative embodiments, the sealing element 55 may have other configurations. In other alternative embodiments, the sealing mechanism 14 may be configured without a sealing element.

[0102] Station 10 also includes a spacer and a positioning surface. The spacer is configured to position the first sealing member and the second sealing member at a predetermined first distance from the positioning surface. When the envelope 120 is positioned against the positioning surface, this predetermined first distance may correspond to the gap between the closed bottom 129 of the envelope 120 and the sealable member 130, so as to align the sealable member 130 with the first and second sealing members. The positioning surface also serves as an envelope support surface configured to support the envelope 120. In an alternative embodiment, the positioning surface and the envelope support surface may be different surfaces.

[0103] In some embodiments, the spacers and positioning surfaces may be part of a shelf configured to support and position the envelope 120. For example, see reference... Figure 3 Station 10 may include a shelf 54, the shelf including a rear portion 86 and a lip 88 adjacent to the rear portion 86. For example... Figure 3 As shown, the upper surface of the lip 88 serves as a positioning surface (and a sleeve support surface), while the rear portion 86 of the shelf 54 serves as a spacer. Figure 5 and Figure 6As shown, station 10 also includes a shelf support mechanism 56 mounted on the lower platform 26 of base 12. Shelf 54 is mounted on the upper end of shelf support mechanism 56. Shelf 54 is located directly below opening 44 in cover 42 of base 12. Moreover, shelf 54 is located directly above opening 30 in lower platform 26.

[0104] Item 121 can be loaded into envelope 120 manually or automatically. Once item 121 has been loaded, such as Figure 8 As shown, the operator can then position the envelope 120 on the shelf 54. In an alternative embodiment, station 10 may be equipped with, or used in conjunction with, automated equipment, allowing the envelope 120 to be positioned on the shelf 54 on an automated basis. As discussed below, the shelf support mechanism 56 is configured to allow adjustment of the height or vertical position of the shelf 54 relative to the sealing mechanism 14, such that the upper portion of the envelope 120, including the sealable member 130, is positioned between the front sealing jaws 34 and the rear sealing jaws 36.

[0105] With the front sealing jaws 34 in the open position (discussed below), the cover 120 can be placed on the shelf 54 from above by lowering the cover 12 through the opening 44 in the cover 42. The station 10 is configured such that the shelf 54 is raised above the floor or other support surface on which the station 10 is positioned. For example, the station 10 may be configured such that the generally upward-facing surface of the lip 88 of the shelf 54 is positioned approximately two to four feet above the support surface, allowing a user to easily load the cover 120 onto the shelf 54 while standing in an upright position beside the station 10. In an alternative embodiment, the base 12 may be configured to raise the shelf 54 to other heights above the support surface.

[0106] Once the envelope 120 has been positioned on the shelf 54, the sealing cycle can begin automatically, or in response to an operator pressing a button or other suitable input device 110 (in Figure 1 (Illustrated in the diagram) The process begins with the input provided. When the sealing cycle begins, the actuator mechanism 16 moves the front sealing jaw 34 toward the rear sealing jaw 36 and to the closed position of the front sealing jaw 34, such that the upper portion of the sleeve 120, including the sealable member 130, is clamped between the front sealing jaw 34 and the rear sealing jaw 36, as shown in the diagram. Figure 4 As shown. When in contact with the front sealing jaws 34 and the rear sealing jaws 36, the upper portion of the cover 120, including the sealable member 130, is heated by the heating element 50. The combination of heat and pressure applied to the cover 120 by the front sealing jaws 34 and the rear sealing jaws 36 causes the sealable member 130 to form a closed seal portion 132, which seals the top of the cover 120.

[0107] The optimal values ​​for sealing parameters (e.g., sealing temperature, sealing pressure, and residence time) depend on the application and can vary with factors such as: the desired strength of the sealing portion 132 (e.g., desired peel strength); the material type of the forming walls 122, 124; the thickness of the walls 122, 124; and the characteristics of the sealable member 130. In some embodiments, station 10 may be configured to automatically set the sealing parameters to predetermined values ​​based on inputs such as the material type of the forming walls 122, 124 and the type of the sealable member 130 on the envelope 120.

[0108] For example, in some applications where walls 122 and 124 are formed of paper, the residence time can be from about 0.25 seconds to about 1.5 seconds, the sealing temperature can be from about 300°F to about 380°F, and the sealing pressure can be about 200 psi or less. These values ​​are provided for illustrative purposes only. In other applications, the residence time, sealing temperature, and sealing pressure may have other values. In some applications, the peel strength and / or hot tack strength of the closed seal 132 is from about 1 psi to about 4 psi. These values ​​are provided for illustrative purposes only. In other applications, the peel strength and hot tack strength have other values.

[0109] After a period of time during which the front sealing jaws 34 and the rear sealing jaws 36 remain in contact with the sleeve 120 to form a closed seal 132, the front sealing jaws 34 move away from the sleeve 120 and the rear sealing jaws 36. Once the front sealing jaws 34 have been retracted to their open position, the shelf support mechanism 56 tilts the shelf 54, causing the sealed sleeve 120 to fall off the shelf. Subsequently, the sleeve 120 falls through the opening 30 in the lower platform 26 and can drop onto the conveyor 60 positioned below the opening 30. The conveyor 60 can then... Figure 1 The envelope 120 is moved in the direction indicated by the middle arrow 61. For example, the conveyor 60 can transport the envelope 120 to a centralized transport or storage location. Alternatively, the sealed envelope 120 can fall into a box or container positioned below the opening 30 for collection together with other sealed envelopes 120.

[0110] In applications where the sealable component 130 is not thermally activated, the controller 112 can prevent the heating element 50 from being activated during the sealing process. In other words, the closed seal 132 can be formed simply by applying pressure to the sleeve 120 through the front sealing jaws 34 and the rear sealing jaws 36.

[0111] In an alternative embodiment, station 10 may include devices such as a blower, a movable arm, a spring, etc., which can blow, push, or otherwise discharge the cover 120 from shelf 54 as an alternative or additional means of tilting shelf 54.

[0112] refer to Figure 3 and Figure 6 The actuator mechanism 16 includes a motor 64. The motor 64 is mounted on the underside of the upper platform 28 of the base 12. The motor 64 includes a shaft 66 extending upward and passing through an opening in the upper platform 28. When the motor 64 is activated, the shaft 66 rotates in response to the torque generated by the motor 64. The motor 64 may be, for example, a servo motor. Alternatively, other types of motors, such as stepper motors, may be used.

[0113] The actuator mechanism 16 also includes a rotating arm or crank 68 and a linkage device 70. For example... Figure 3 As shown, the first end of crank 68 is connected to the shaft 66 of motor 64, such that crank 68 is rotated by motor 64 when motor 64 is activated. The second end of crank 68 is connected to the first end of linkage 70 by a pin or other suitable structure, such that linkage 70 can pivot relative to crank 68, as... Figure 4 As shown by arrow 79 in the image.

[0114] refer to Figure 2-4 The actuator mechanism 16 also includes a second actuator member in the form of a rear actuator bar 72, a first actuator member in the form of a front actuator bar 74, and two guide arms 76. The rear actuator bar 72 is connected to the second end of the linkage 70 by a pin or other suitable structure, allowing the linkage 70 to pivot relative to the rear actuator bar 72, such that... Figure 4 As shown by arrow 79 in the image.

[0115] Each guide arm 76 is configured as a rod with a cylindrical cross-section. In alternative embodiments, the guide arms 76 may have other configurations. Each guide arm 76 extends through a corresponding orifice located near the corresponding longitudinal end of the rear actuator bar 72. The guide arms 76 are connected to the rear actuator bar 72 at a position near the longitudinal midpoint of each guide arm 76. Therefore, the guide arms 76 translate horizontally along with the rear actuator bar 72, as... Figure 3 and 4 As indicated by the middle arrow 78.

[0116] The front end of each guide arm 76 is connected to the front actuator bar 74 near the corresponding side or end portion of the front actuator bar 74, such that the horizontal movement of the rear actuator bar 72 in the front-rear direction drives the corresponding movement of the front actuator bar 74 via the guide arm 76.

[0117] The actuator mechanism 16 also includes two fixed guides 80. For example... Figures 2 to 4As shown, a fixing guide 80 is mounted on the upper surface of the upper platform 28 of the base 12, at a corresponding position located approximately midway between the front and rear edges of the upper platform 28. Each fixing guide 80 defines an aperture configured to receive a corresponding one of the guide arms 76. The guide arms 76 extend through the aperture through their associated fixing guide 80. Each fixing guide 80 supports, guides, and laterally restrains its associated guide arm 76 while allowing the guide arm 76 to move relative to the fixing guide 80 in the longitudinal direction.

[0118] The actuator mechanism 16 also includes a fixed guide bar 83. The fixed guide bar 83 is mounted on the upper surface of the upper platform 28 of the base 12, near the front end of the upper platform 28. Therefore, the fixed guide bar 83 is located between the rear actuator bar 72 and the front actuator bar 74. The fixed guide bar 83 has two orifices formed therein near the respective sides of the fixed guide bar 83. A bushing is provided within each respective orifice of the fixed guide bar 83. Each bushing receives a corresponding one of the guide arms 76, such that the guide arm 76 passes through the fixed guide bar 83 and can be linearly translated relative to the fixed guide bar. The fixed guide bar 83 supports, guides, and laterally constrains the guide arm 76, while allowing the guide arm 76 to move relative to the fixed guide bar 83 in a forward-backward direction (i.e., in the direction indicated by arrow 78).

[0119] refer to Figure 3 The rear sealing jaw 36 is suspended from the fixed guide bar 83 by a post 51 extending from the forward-facing side of the fixed guide bar 83. A spring 52, positioned between the rear sealing jaw 36 and the fixed guide bar 83, biases the rear sealing jaw 36 in the forward direction. A fastener 53 or other suitable structure extending between the fixed guide bar 83 and the rear sealing jaw 36 restricts movement of the rear sealing jaw 36 in the forward direction. The fastener 53, in conjunction with the spring 52, facilitates adjustment of the position of the rear sealing jaw 36 relative to the fixed guide bar 83 and the shelf 54.

[0120] Crank 68 and linkage 70 together act as a crank mechanism, which generates reciprocating motion in the rear actuator bar 72, thereby causing the front sealing jaws 34 to move between their open and closed positions. Specifically, in response to the activation of motor 64, the rotational motion of crank 68 causes crank 68 to apply a force to linkage 70. This force is transmitted by linkage 70 to the rear actuator bar 72, and, depending on the relative position and orientation of crank 68 and linkage 70, causes the rear actuator bar 72 to move in a forward or rearward direction.

[0121] Figure 1-3 and Figure 6The sealing mechanism 14 and actuator mechanism 16 are shown at the start of the sealing cycle. The front sealing jaw 34 is in the open or forward position, where the distance between the front sealing jaw 34 and the rear sealing jaw 36 is maximized, allowing the top of the sleeve 120 to be positioned between the front sealing jaw 34 and the rear sealing jaw 36. The front sealing jaw 34 and the rear sealing jaw 36 define an opening 59 (e.g., Figure 3 As shown, the opening 59 is configured to receive the envelope 120. The depth of the opening 59 may be approximately equal to the distance between the front sealing jaws 34 and the rear sealing jaws 36, and its width may be at least twice the depth of the opening 59. In alternative embodiments, the opening 59 may have other relative dimensions.

[0122] from Figure 3 From this perspective, crank 68 is positioned at the 3 o'clock position, aligning its longitudinal axis with that of the linkage 70. The linkage 70 is directly positioned between crank 68 and the rear actuator bar 72, with minimal overlap between the linkage 70 and crank 68. This configuration places the rear actuator bar 72 at its foremost position, where the distance between the rear actuator bar 72 and motor 64 is greatest, and the distance between it and the fixed guide bar 83 is smallest.

[0123] As the crank 68 of motor 64 moves from Figure 3 Rotating the indicated position approximately 90 degrees clockwise (not shown), the linkage 70 and the attached rear actuator bar 72 move rearward. The lateral constraints of the fixed guide 80 and fixed guide bar 83 on the guide arm 76 and rear actuator bar 72 cause the rear actuator bar 72 to move linearly rearward. Furthermore, the crank 68 is no longer aligned with the longitudinal axis of the linkage 70, and the distance between the motor 64 and the rear actuator bar 72 is no longer at its maximum value. The rearward movement of the rear actuator bar 72, and the corresponding rearward movement of the guide arm 76 and the front actuator bar 74, pull the front sealing jaw 34 towards the rear sealing jaw 36 and the sleeve 120.

[0124] As crank 68 rotates further clockwise... Figure 3 As shown, the linkage 70 and the attached rear actuator bar 72 move further rearward to the position indicated. Figure 4 The corresponding positions are shown. At this time, the longitudinal axis of the crank 68 is aligned with that of the linkage 70, wherein the linkage 70 completely overlaps with the crank 68. The distance between the motor 64 and the rear actuator bar 72 is at its minimum value, and the rear actuator bar 72 is in its rearmost position.

[0125] like Figure 4As shown, the rearward movement of the rear actuator bar 72 and the corresponding rearward movement of the guide arm 76 pull the front actuator bar 74 backward, which in turn pulls the attached front sealing jaw 34 to its rearward or closed position. When in the closed position, the front sealing jaw 34 contacts the upper portion of the cover 120 and pushes the upper portion of the cover 120 into the rear sealing jaw 36.

[0126] At this time, as Figure 4 As shown, the upper portion of the envelope 120, including the sealable member 130, is clamped between the front sealing jaws 34 and the rear sealing jaws 36 and subjected to compression and heat from both. The rear sealing jaws 36, fixed to the upper platform 28 of the base 12 by the fixing guide strip 83, remain stationary relative to the front sealing jaws 34, and thus, while the front sealing jaws 34 press the upper portion of the envelope 120 against the rear sealing jaws 36, the rear sealing jaws exert a reaction force on the upper portion of the envelope 120. As described above, the heat and pressure applied to the upper portion of the envelope 120 by the front sealing jaws 34 and the rear sealing jaws 36 cause the sealable member 130 to form a closed seal 132.

[0127] The above description of actuator mechanism 16 is provided for illustrative purposes only. In alternative embodiments of station 10, actuator mechanism 16 may have other configurations. For example, in an alternative embodiment, a vertically oriented actuator mechanism may be used.

[0128] In an alternative embodiment, the rear sealing jaw 36 may be configured to move toward the front sealing jaw 34 to perform the sealing operation described above. In such an embodiment, the front sealing jaw 34 may be configured to move toward the rear sealing jaw 36 in the manner described above. Alternatively, the front sealing jaw 34 may be configured to remain stationary while the rear sealing jaw 36 pushes the upper portion of the cover 120 into the front sealing jaw 34.

[0129] Station 10 may include controller 112 (in Figure 1 (Illustrated schematically) The controller is configured to activate motor 64 in response to user input when the user wishes to initiate a sealing cycle. Additionally, or in an alternative embodiment, controller 112 may be configured to automatically activate motor 64 in response to sensor input indicating the presence of cover 120 on shelf 54.

[0130] Once the motor 64 is activated at the start of the sealing cycle, it causes the crank 68 to... Figure 3 and Figure 4 The first sealing jaw 34 is continuously driven from its open position to its closed position by rotating continuously between the indicated positions. When the first sealing jaw 34 reaches... Figure 4When the motor is in its closed position, controller 112 causes motor 64 to stop, i.e., deactivate. Motor 64 remains deactivated for a sufficient period of time to allow the first sealing jaws 34 and the second sealing jaws 36 to apply sufficient heat and pressure to the sleeve 120 to form a closed seal 132 by the sealable member 130. Once this dwell time has elapsed, controller 112 reactivates motor 64. Upon reactivation, motor 64 causes crank 68 to rotate clockwise (from...). Figure 3 (From the perspective of) rotation. This additional clockwise rotation drive linkage 70, rear actuator bar 72, guide arm 76 and front actuator bar 39 of crank 68 return to Figure 3 The original positions of the components are shown, indicating that the movement of the components is opposite to or in the opposite direction to their corresponding movement during the initial part of the sealing cycle. The additional clockwise rotation of crank 68 and the resulting movement of linkage 70, rear actuator bar 72, guide arm 76 and front actuator bar 39 cause the front sealing jaw 34 to return to its open position.

[0131] At this point, as described above, the sealed envelope 120 can be removed from station 10, another envelope 120 can be placed on shelf 54, and another sealing cycle can begin.

[0132] In an alternative embodiment, the actuator mechanism 16 may have a configuration different from the crank mechanism described above. For example, a linear actuator or other suitable device or mechanism driven by electricity, pneumatics, hydraulics or other means may be used instead of the motor 64, crank 68 and linkage 70 to apply the aforementioned movement of the rear actuator bar 72.

[0133] like Figure 3 and Figure 5 As shown, shelf 54 includes a rear portion 86 and a lip 88 adjacent to the rear portion 86. The angle between the rear portion 86 and the lip 88 relative to each other can be approximately 90 degrees or greater. For example, the angle between the rear portion 86 and the lip 88 relative to each other can be from approximately 90 degrees to approximately 120 degrees. When shelf 54 is in its untilted position, the shelf is oriented such that the rear portion 86 is tilted rearward, as... Figure 6 The angle “α” shown is illustrated. The value of α relative to the vertical direction can be, for example, from about 5 degrees to about 30 degrees. Therefore, when the sleeve 120 is placed on the shelf 54 and the lower edge of the sleeve 120 rests on the lip 88, the lip 88 restricts the downward movement of the sleeve. When the front sealing jaws 34 and the rear sealing jaws 36 engage the upper portion of the sleeve 120 as described above and form a closed seal 132, the sleeve 120 remains supported by the rear portion 86 and the lip 88.

[0134] The above description of shelf 54 is provided for illustrative purposes only. In alternative embodiments, shelf 54 (or other structures providing spacers, positioning surfaces, and cover support surfaces) may have other configurations. For example, in an alternative embodiment, shelf 54 may be a generally planar square or rectangular platform. In other alternative embodiments, shelf 54 may include a recessed surface configured to support cover 120. In other alternative embodiments, shelf 54 may be formed from one or more strips, rods, pads, meshes, etc.

[0135] Station 10 also includes a lateral guide configured and positioned relative to the sealing mechanism 14 and the spacer. The lateral guide guides laterally and orients the sleeve 120 into contact with the positioning surface. For example, station 10 may include a lateral guide in the form of a sidewall 94.

[0136] refer to Figure 5 and Figure 6 The station 10 also includes a shelf guide 90, which includes a rear portion 92 and a side wall 94. The side wall 94 is adjacent to the opposite end of the rear portion 92. The shelf guide 90 is suspended from the underside of the upper platform 28 of the base 12 such that the shelf guide 90 partially surrounds the shelf 54, wherein the side wall 94 is disposed on the opposite side of the shelf 54.

[0137] The sidewalls 94 slope inward as they extend downward, such that when the sleeve 120 is placed on the shelf 54, the sidewalls 94 have a centering effect on the sleeve 120; that is, the sidewalls 94 are configured to center the sleeve 120 relative to the first sealing jaw 34 and the second sealing jaw 36. In an alternative embodiment, the shelf guide 90 may be configured such that the spacing between the sidewalls 94 (in...) Figure 5 The envelope (represented by the symbol "W") can be adjusted to accommodate envelopes of different widths 120.

[0138] refer to Figure 5 and Figure 6 The shelf support mechanism 56 includes a mounting post 96 and an actuator 98 communicatively coupled to a controller 112. The mounting post 96 and actuator 98 are mounted on a lower platform 26 of the base 12. The mounting post 96 may have a telescopic configuration. Specifically, the mounting post 96 includes a fixed lower portion mounted on the lower platform 26 and an upper portion. The upper portion is positioned above the lower portion and configured to telescopically translate relative to the lower portion. The actuator 98 is connected to the upper portion via a cable or other suitable hardware, allowing the actuator 98 to raise and lower the upper portion relative to the lower portion.

[0139] Shelf 54 is attached to the upper portion of mounting post 96, allowing shelf 54 to be raised or lowered by actuator 98 in response to user input to controller 112. User input can be provided via input device 110.

[0140] Details regarding the mounting post 96 are provided for illustrative purposes only. In alternative embodiments, the shelf 54 may be raised and lowered by structures and devices with other configurations. For example, the shelf 54 may be mounted on a vertically oriented track, facilitating its vertical movement. In other alternative embodiments, the shelf 54 may be suspended from the underside of the upper platform 28. In other alternative embodiments, the height of the shelf 54 may be non-adjustable.

[0141] refer to Figure 6 The shelf support mechanism 56 also includes a mounting bracket 100 connected to the upper end of the upper portion of the mounting post 96. The shelf support mechanism 56 further includes two mounting arms 102 and an actuator 104 mounted on the mounting bracket 100 and communicatively coupled to the controller 112. A first end of each mounting arm 102 is connected to the rear portion 92 of the shelf 54. A second end of each mounting arm 102 is connected to the mounting bracket 100 by a pin or other suitable structure that facilitates pivoting of the mounting arm 102 relative to the mounting bracket 100.

[0142] Actuator 104 is coupled to mounting arm 102 via a pin or other suitable structure that facilitates pivoting of the upper portion of mounting arm 102 relative to actuator 104 and mounting post 96. Actuator 104 is configured to apply a pushing or pulling force to mounting arm 102 via the associated pin. This force causes mounting arm 102 to pivot about pin 108, which in turn changes the orientation of shelf 54.

[0143] Before the sealing cycle begins, the user can adjust the height of the shelf 54 as described above, so that the upper portion of the cover 120, including the sealable member 130, is aligned with the front sealing jaws 34 and the rear sealing jaws 36 (and the heating element 50). Specifically, as... Figure 5 As shown, the user can adjust the height of the shelf 54 so that the vertical distance or height "H" between the bottom of the rear portion 86 of the shelf 54 and the front sealing jaws 34 and the rear sealing jaws 36 approximately corresponds to the vertical distance between the sealable member 130 and the bottom edge of the cover 120. When the cover 120 is placed on the shelf 54, this causes the sealable member 130 to be aligned with the front sealing jaws 34 and the rear sealing jaws 36.

[0144] like Figure 5 As shown, the rear portion 92 of the shelf guide 90 has a slot 93 formed therein to accommodate the up-and-down movement of the mounting arm 102 of the shelf support mechanism 56 during the raising and lowering of the shelf 54. As described above, the shelf 54 is typically arranged in... Figure 3 and 5The orientation shown causes the lip 88 of the shelf 54 to constrain the downward movement of the sleeve 120. Therefore, when the front sealing jaws 34 and the rear sealing jaws 36 engage the upper portion of the sleeve 120 and form a closed seal 132, the sleeve 120 is still supported by the shelf 54. After the sealing cycle is complete, the actuator 98 can tilt the shelf 54 forward by acting on the mounting arm 102. The tilting of the shelf 54 causes the newly sealed sleeve 120 to fall from the shelf 54 and downward through the opening 30 in the lower platform 26. As described above, the sleeve 120 can then be conveyed by the conveyor 60 located below the opening 30, or it can be collected in a box or crate positioned below the opening 30.

[0145] The tilting of shelf 54 can be automatically implemented upon completion of each sealing cycle in response to an input generated by controller 112. Alternatively, tilting can be initiated by user input provided via a button or other suitable device communicatively coupled to controller 112. In an alternative embodiment, shelf 54 can be configured for manual tilting. In such an embodiment, shelf 54 can be spring-biased to, for example... Figure 3 and Figure 5 The shelf 54 is shown in an upright position and can be tilted by the user by applying a force that overcomes the spring bias. Alternatively, the shelf 54 may be restricted to an upright (i.e., non-tilted) position by a latch or other device that can be released when tilting of the shelf 54 is required. In other alternative embodiments, the shelf 54 may be configured to have no tilting capability. In such embodiments, the user can lift the sealed cover 120 from the shelf 54 and drop the cover 120 through the opening 30 in the lower platform 26. Alternatively, the user can lift the cover 120 upwards through the opening 44 in the cover 42.

[0146] Although the solution has been illustrated and described with respect to one or more embodiments, equivalent changes and modifications will occur to those skilled in the art upon reading and understanding this specification and the accompanying drawings. Furthermore, while specific features of the solution may be disclosed only with respect to one of several embodiments, such features may be combined with one or more other features of other embodiments, which may be desired and advantageous for any given or particular application. Therefore, the breadth and scope of the solution should not be limited to any of the embodiments described above. Rather, the scope of the solution should be defined according to the appended claims and their equivalents.

[0147] Figure 9 An alternative embodiment of station 10 in the form of a freestanding platform station 200 is shown. Station 200 is substantially similar to station 10, except that station 200 does not include the base 12. Furthermore, station 200 is more compact than station 10, allowing station 200 to be placed directly on a raised surface, for example... Figure 9The upper surface 202 of the wall-mounted shelf 204 is shown. The upper surface 202 can serve as a working surface on which the supply of unfilled envelopes 120 can be placed, allowing an operator to easily pick up, load, and seal each envelope 120 while standing or sitting when using the station 200. An alternative embodiment of the station 200 can be configured such that the station is secured to the upper surface 202 of the wall-mounted shelf 204 by clamping or other means, such that a portion of the station is suspended above the edge of the shelf 204, and the sealed envelope 120 can fall into a container or conveyor positioned below the suspended portion of the station.

[0148] Figure 10 A cross-sectional view shows another alternative embodiment of station 10 in the form of a freestanding countertop station 300. Station 300 is substantially similar to station 200, except that station 300 includes spacers in the form of adjustable legs 302. Furthermore, the bottom of station 300 is open, allowing the cover 120 to rest directly on the top surface 202 of the wall-mounted shelf 204. The adjustable legs 302 allow station 300 to be raised and lowered relative to surface 202, allowing adjustment of the height "H1" of the front sealing jaws 336 and rear sealing jaws 334 above surface 202 so that when the bottom edge of the cover 120 rests on surface 202 (e.g., when...),... Figure 10 As shown), the sealable member 130 of the envelope 120 is aligned with the front sealing jaws 336 and the rear sealing jaws 334. The station 300 also includes inclined side support walls 304 and opposing walls 306, which help to support and position the envelope 120.

[0149] Figure 10 Actuator mechanism 316 is also shown, configured to move the rear sealing jaw 334 toward and away from the front sealing jaw 336. The rear sealing jaw 334 is movable in the direction indicated by arrow 301. A corresponding heating element 350 is located on each of the front sealing jaw 336 and the rear sealing jaw 334. As discussed above with respect to station 10, the combination of heat and pressure applied to the sleeve 120 by the front sealing jaw 336, the rear sealing jaw 334, and the heating element 350 causes the sealable member 130 to form a closed seal 132 that seals the top of the sleeve 120. In an alternative embodiment, the front sealing jaw 336 may also be configured to be movable as an additional or alternative to the rear sealing jaw 334.

[0150] Figure 11 Another alternative embodiment of station 10 in the form of station 400 is shown. Station 400 is substantially the same as station 10, but with the following differences. Components in station 400 that are the same as those in station 10 are indicated by the same reference numerals in the drawings.

[0151] Station 400 includes a wall manipulation device 402. The wall manipulation device 402 includes four suction cups 404, 406. Each suction cup 404, 406 is in fluid communication with a vacuum source (not shown). Suction cup 404 is mounted on the rear actuator bar 36, and suction cup 406 is mounted on the front actuator bar 74. In response to a vacuum applied to suction cups 404, 406, suction cup 404 is configured to grip the wall 122 of the cover 120, and suction cup 406 is configured to grip the wall 124.

[0152] Station 400 can be configured to open sleeve 120 after sleeve 120 has been placed on shelf 54. Specifically, the rear actuator strip 36 can advance in the forward direction so that suction cup 404 contacts the wall 122 of sleeve 120. The forward movement of the rear actuator strip 36 then causes the wall 124 to contact suction cup 406. At this time, the rear actuator strip 36 can move in the rearward direction. The suction force exerted by suction cup 404 on wall 122 causes wall 122 to be pulled in the rearward direction along with the rear actuator strip 36. The suction force exerted by suction cup 406 on wall 124 causes the central portion of wall 124 to remain stationary. Thus, the rearward movement of the rear actuator strip 36 and suction cup 404 forms an opening 140 leading to sleeve bag 125, thereby allowing article 121 to be placed into sleeve bag 125. Sleeve 120 can then be sealed in the manner described above with respect to sleeve 120.

[0153] The wall manipulation device 402 may also be other types of devices used to cause the walls 122, 124 to separate to form the opening 140. For example, the wall manipulation device 402 may include articulated fingers that grip the upper edges of the respective walls 122, 124 or may include a blower that uses forced air to separate the walls 122, 124.

[0154] Figure 12 Another alternative embodiment of station 10 in the form of station 500 is shown. Station 500 is configured to allow envelope 120 to seal while in a horizontal orientation.

[0155] Station 500 includes a horizontal sleeve support surface 502 on which the sleeve 120 rests after being inserted into station 500. The sleeve support surface 502 and the top portion 504 of station 500 define a sealing region 506 within station 500. In other alternative embodiments, the sleeve support surface 502 may also be oriented at an angle.

[0156] The station 500 also includes an upper sealing jaw 508, a lower sealing jaw 510, and an actuation mechanism 511. A corresponding heating element 512 is located on each of the upper sealing jaw 508 and the lower sealing jaw 510. The upper sealing jaw 508 is fixed to the underside of the top portion 504 of the station 500. The lower sealing jaw 510 is fixed to the actuator bar 516 of the actuation mechanism 511.

[0157] The actuation mechanism 511 also includes a worm gear 518 and an actuator 520 configured to rotate the worm gear 518. The worm gear 518 is configured to mesh with teeth formed on the actuator bar 516, such that rotation of the worm gear 518 causes the actuator bar 516 and the attached lower sealing jaw 510 to move upward or downward. In an alternative embodiment of the station 500, the actuation mechanism 511 may have other configurations.

[0158] Station 500 also includes a stop 522. The stop 522 is located within the sealing region 506 and configured to contact the bottom edge of the sleeve 120 when the sleeve 120 is placed on the sleeve support surface 502. The stop 522 is movable in the direction indicated by arrow 524, allowing adjustment of the horizontal position of the stop 522 relative to the upper sealing jaw 508 and the lower sealing jaw 510. This feature allows alignment of the sealable member 130 of the sleeve 120 with the upper sealing jaw 508 and the lower sealing jaw 510, wherein the surface of the stop that contacts the bottom edge of the sleeve 120 acts as a positioning surface.

[0159] The upper end of the stop 522 can be connected to a knob 514 located above the top portion 504 of the station 500, allowing the user to manually move the stop 522. The stop 522 can be positioned on a spacer in the form of a mounting base 526, which is configured to apply friction to the stop 522, so that the stop 522 remains in place once positioned by the operator.

[0160] In other alternative embodiments, station 500 may include a lateral guide located within sealing region 508. This lateral guide may be configured and positioned relative to upper sealing jaws 508 and lower sealing jaws 510 and sleeve support surface 502 to guide laterally and orient the sleeve 120 into contact with stop 522. In some embodiments, the lateral guide may be configured similarly to the sidewall 94 of station 10.

[0161] Once the envelope 120 has been placed on the envelope support surface 502 within the sealing area 506, and the stop 522 has been positioned to align the sealable member 130 with the upper sealing jaw 508 and the lower sealing jaw 510, the sealing cycle can begin automatically or in response to input from an operator via a button or other suitable input device (not shown). When the sealing cycle is initiated, the actuator 520 of the actuation mechanism 511 is activated to advance the lower sealing jaw 510 upward, which ultimately causes the envelope 120 to contact the upper sealing jaw 508. The combination of heat and pressure applied to the envelope 120 by the upper sealing jaw 508, the lower sealing jaw 510, and the heating element 512 causes the sealable member 130 to form a closed seal 132 that seals the top of the envelope 120, as discussed above regarding station 10.

[0162] Once the upper sealing jaw 508, the lower sealing jaw 510, and the heating element 512 have been in contact with the cover 120 for a sufficient amount of time to form a closed seal 132, the actuation mechanism 511 can be activated to move the lower sealing jaw 510 downward to its initial position, after which the sealed cover 120 can be removed from the station 500.

Claims

1. A station for sealing envelopes, the station comprising: A sealing mechanism comprising a first sealing member and a second sealing member, the first sealing member and the second sealing member being configured to apply heat and pressure to a sealable member of a sleeve disposed between the first sealing member and the second sealing member, the heat and the pressure being sufficient to activate the sealable member to form a closed seal in the sleeve; A spacer is configured to position the first sealing member and the second sealing member at a predetermined first distance from a positioning surface, the predetermined first distance corresponding to the gap between the closed bottom of the cover and the sealable member, so as to align the sealable member with the first sealing member and the second sealing member when the cover is positioned against the positioning surface; as well as A lateral guide, configured and positioned relative to the sealing mechanism and the spacer, to guide and orient the envelope laterally into contact with the positioning surface.

2. The station according to claim 1, wherein, The lateral guide includes a sidewall configured to center the envelope relative to the first sealing member and the second sealing member.

3. The station according to claim 1, wherein, The positioning surface includes a cover support surface configured to support the cover.

4. The station according to claim 3, wherein, The shelf includes the spacer and the positioning surface.

5. The station according to claim 2, wherein, The sidewall slopes inward and downward.

6. The station according to claim 2, wherein: The sidewall is a first sidewall, and the lateral guide further includes a second sidewall; and the guide is configured such that the distance between the first sidewall and the second sidewall can be changed.

7. The station according to claim 4, wherein, The shelf is configured to tilt between a first angular orientation position and a second angular orientation position, wherein at the first angular orientation position the positioning surface of the shelf supports the cover, and at the second angular orientation position the cover can fall off the shelf.

8. The station according to claim 4, wherein: The shelf includes a lip and a rear portion connected to the lip; The positioning surface includes the upper surface of the lip margin; The spacer includes the rear portion; and The upper surface of the lip is configured to engage with the bottom edge of the cover.

9. The station according to claim 8, wherein: The main surface of the rear portion is configured to engage with the wall of the sleeve; and The main surface of the rear portion is at an angle relative to the vertical direction.

10. The station of claim 1, further comprising an actuator mechanism configured to move the first sealing member between a first position and a second position.

11. The station according to claim 10, wherein, The first sealing member is further configured to push the sleeve into the second sealing member when the first sealing member is in the second position of the first sealing member, so that the sealable member is squeezed and compressed.

12. The station according to claim 4, wherein, The shelf and the sealing mechanism are mounted on the base.

13. The station according to claim 12, further comprising a column mounted on the base, wherein, The shelf is mounted on the column, and the column is configured to lift the support relative to the sealing mechanism.

14. The station according to claim 12, wherein: The base includes multiple legs and a platform connected to and supported by the legs; and At least one of the sealing mechanism and the shelf is mounted on the platform.

15. The station according to claim 14, wherein: The platform is the first platform; and The station also includes a second platform, which is connected to and supported by the outriggers and positioned below the first platform.

16. The station according to claim 15, wherein: The sealing mechanism is mounted on the first platform; and The shelf is mounted on the second platform.

17. The station according to claim 15, wherein: The second platform has an opening therein; and The opening is located below the shelf and aligned with the shelf.

18. A packaging and conveying system, the packaging and conveying system comprising: The station according to claim 17; as well as At least one of the conveyor and the container is configured to be positioned below the opening in the second platform and to receive the envelope through the opening.

19. A station for sealing a envelope, the station comprising: A sealing mechanism comprising a first sealing member and a second sealing member, the first sealing member and the second sealing member being configured to apply heat and pressure to the sealable member when a sealable member on the sleeve is disposed between the first sealing member and the second sealing member, the heat and the pressure being sufficient to activate the sealable member and form a closed seal in the sleeve; A spacer is configured to position the first sealing member and the second sealing member at a predetermined first distance from a positioning surface, the predetermined first distance corresponding to the gap between the closed bottom of the cover and the sealable member, so as to align the sealable member with the first sealing member and the second sealing member when the cover is positioned against the positioning surface; as well as A cover, wherein an opening is formed in the cover, the opening being located above the spacer and the positioning surface, and configured to allow the cover to be manually lifted and removed from the shelf.

20. The station according to claim 19, wherein, The positioning surface includes a cover support surface configured to support the cover.

21. The station according to claim 20, wherein, The shelf includes the spacer and the positioning surface.

22. The station according to claim 19, wherein, The opening is configured to allow the cover to be manually lowered onto the shelf.

23. The station according to claim 19, wherein, The opening is configured such that the cover is centered relative to the first sealing member and the second sealing member.

24. The station according to claim 19, wherein, The cover includes a flat upper surface.

25. The station according to claim 24, wherein, The shelf is configured to raise the upper end of the cover above the upper surface when the cover is supported by the shelf.

26. The station according to claim 24, wherein, The upper surface is configured to facilitate loading the envelope while it rests on the upper surface.

27. The station according to claim 24, wherein, The upper surface has a width of at least about two feet and a depth of at least about two feet.

28. The station according to claim 24, wherein, The upper surface has a width between about two feet and about five feet, and a depth between about two feet and about five feet.

29. The station according to claim 24, wherein, The upper surface of the cover is the uppermost surface of the station.

30. The station according to claim 24, further comprising a base, wherein, The support, the sealing mechanism, and the cover are mounted on the base.

31. The station according to claim 30, wherein, The base is configured to support the station from the support surface and to raise the upper surface to approximately two to five feet above the support surface.

32. A packaging system, the packaging system comprising: Multiple unconnected envelopes, and each of the envelopes comprises: First flexible wall; A second flexible wall covers the first flexible wall and is fixed to the first flexible wall at at least a portion of the bag boundary, the bag boundary surrounding a bag defined between the first and second flexible walls, the bag being configured and sized to accommodate articles, at least one of the first and second flexible walls defining a bag opening that allows access to the bag from outside the envelope for placing the articles into the bag; and A sealable member disposed on the first flexible wall and configured to form a closed seal portion, the closed seal portion securing the first flexible wall to the second flexible wall at the bag opening to seal the bag closed; and Sealing station, the sealing station comprising: A sealing mechanism comprising a first sealing member and a second sealing member, the first sealing member and the second sealing mechanism being configured to apply heat and pressure to the sealable member when a corresponding sealable member on each of the envelopes is disposed between the first sealing member and the second sealing member, the heat and pressure being sufficient to activate the sealable member and form the closed seal; and A spacer is configured to position the first sealing member and the second sealing member at a predetermined first distance from a positioning surface, the predetermined first distance corresponding to the gap between the closed bottom of the cover and the sealable member, so as to align the sealable member with the first sealing member and the second sealing member when the cover is positioned against the positioning surface.

33. The system according to claim 32, wherein, The positioning surface includes a cover support surface configured to support the cover.

34. The system of claim 33, further comprising a shelf, wherein, The shelf includes the spacer and the positioning surface.

35. The system according to claim 34, wherein: The shelf is configured to support the lower edge of the cover; and The distance between the lower edge of the cover and the sealable member of the cover is approximately equal to the distance between the surface of the shelf and the first sealing member.

36. The system according to claim 32, wherein, The first sealing member is a first sealing jaw, and the second sealing member is a second sealing jaw.

37. The system according to claim 32, wherein, The sealable component includes a heat-activated material.

38. The system according to claim 37, wherein, The heat-activated material is either a heat-sealable material or a hot melt adhesive.

39. The system according to claim 38, wherein, At least one of the first sealing member and the second sealing member includes a heating element.

40. The system according to claim 32, wherein, At least one of the first flexible wall and the second flexible wall of the envelope comprises paper.

41. The system according to claim 40, wherein, At least one of the first flexible wall and the second flexible wall of the envelope comprises stretchable paper.

42. A method for sealing a envelope, the method comprising: Manually place the envelope on the positioning surface of the sealing station so that the sealable component on the envelope is aligned with the sealing component of the sealing station; The sealing member applies heat and pressure to the sealable member, the heat and pressure being sufficient to activate the sealable member and form a closed seal in the sleeve; as well as Remove the sealed cover from the positioning surface.

43. The method of claim 42, further comprising lowering the envelope onto the positioning surface.

44. The method of claim 43, further comprising lowering the envelope onto the positioning surface through an opening in the cover of the sealing station.

45. The method of claim 42, further comprising lifting the envelope from the positioning surface.

46. ​​The method of claim 45, further comprising lifting the sleeve from the positioning surface through an opening in the cover of the sealing station.

47. The method of claim 46, further comprising reaching and grasping the envelope through the opening.

48. The method of claim 42, further comprising adjusting the height of the positioning surface such that when the cover is placed on the positioning surface, the sealable member is aligned with the sealing member.

49. The method of claim 42, further comprising adjusting the vertical position of the positioning surface relative to the sealing member such that when the cover is placed on the positioning surface, the upper edge of the cover is above the opening in the cover.

50. The method according to claim 42, wherein, The envelope is a first envelope, and the method further includes: Adjust the vertical position of the positioning surface relative to the sealing member so that when the second sleeve is placed on the positioning surface, the sealable member on the second sleeve is aligned with the sealing member, and the height of the second sleeve is different from the height of the first sleeve; The sealing member applies heat and pressure to the sealable member of the second envelope, the heat and pressure being sufficient to activate the sealable member of the second envelope and form a closed seal within the second envelope; and Remove the sealed second cover from the positioning surface.

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