Patent Application
20240208695
The subject matter described herein relates to zipper assemblies of resealable enclosures, such as bags, pouches, or the like, that can be repeatedly opened and closed using interlocking members of the zipper assemblies.
Resealable enclosures are used to store a variety of materials. For example, pouches, bags, or the like, can be used to store food, pharmaceuticals, or other consumer products and may include resealable closure assemblies. These closure assemblies include a zipper assembly attached to an end of the bag or enclosure. Typically, the zipper assembly is attached to the enclosure during a heat sealing process in which heat is applied to the zipper assembly and/or the enclosure during an application process to activate and/or cure an adhesive layer between the zipper assembly and the enclosure. However, the heat applied during the application process may damage the zipper assembly and/or the enclosure, such as by scorching the materials leading to waste.
Some zipper assemblies use cold seal adhesive to apply the zipper assembly to the enclosure, which may be applied at or near room temperature. However, there is a risk of the cold seal adhesive being inadvertently attached to other portions of the zipper assembly. For example, during shipping, long lengths of the zipper assembly may be rolled on a supply roll in many layers. The cold seal adhesive from one layer of the zipper assembly may inadvertently seal to an adjacent layer of the zipper assembly leading to damage to the seal layer and/or the material of the zipper assembly.
In one embodiment, a zipper assembly for an enclosure is provided. The zipper assembly includes a flange having an interlocking side and an opposite panel side. The interlocking side has interlocking members configured to releasably engage and release from other interlocking members to alternate between closed and open states of the enclosure. The panel side is configured to be sealed to panels of the enclosure to affix the zipper assembly to the enclosure. The zipper assembly includes posts protruding from the panel side of the flange. The posts are configured to prevent compression of the posts and maintain a spatial separation between the panel side of the flange and the interlocking side of the flange while the zipper assembly is wound onto a supply roll. The posts are configured to collapse upon compression of the posts during sealing of the panel side of the flange to the panels of the enclosure to allow the panel side of the flange to be sealed to the panels.
In another embodiment, a method for forming a zipper assembly for an enclosure is provided. The method includes forming the zipper assembly to have a flange with an interlocking side and an opposite panel side. The flange is formed with interlocking members protruding from the interlocking side and positioned to releasably engage and release from other interlocking members to alternate between closed and open states of the enclosure. The flange also is formed with the panel side positioned to be sealed to panels of the enclosure to affix the zipper assembly to the enclosure. The zipper assembly is formed to have posts protruding from the panel side of the flange. The posts are formed to prevent compression of the posts and maintain a spatial separation between the panel side of the flange and the interlocking side of the flange while the zipper assembly is wound onto a supply roll. The posts are formed to collapse upon compression of the posts during sealing of the panel side of the flange to the panels of the enclosure to allow the panel side of the flange to be sealed to the panels.
In a further embodiment, a zipper assembly for an enclosure is provided. The zipper assembly includes a flange having an interlocking side and an opposite panel side. The interlocking side has interlocking members protruding from first areas of the interlocking side and shaped to releasably engage and release from other interlocking members to alternate between closed and open states of the enclosure. The panel side is configured to be cold sealed to panels of the enclosure to affix the zipper assembly to the enclosure. The zipper assembly includes posts protruding from the panel side of the flange in second areas of the flange side. The posts are configured to prevent compression of the posts and maintain a spatial separation between the panel side of the flange and the interlocking side of the flange while the zipper assembly is wound onto a supply roll. The posts are configured to collapse upon compression of the posts during cold sealing of the panel side of the flange to the panels of the enclosure to allow the panel side of the flange to be sealed to the panels.
The inventive subject matter may be understood from reading the following description of non-limiting embodiments, with reference to the attached drawings, wherein below:
The enclosure 10 may be a bag, pouch, or other container. The enclosure 10 is formed from one or more webs 12 of flexible material (e.g., a polymer). These webs 12 form one or more of the panels 14, 16, which are attached to the zipper assembly 100 during the application process. In an exemplary embodiment, the zipper assembly 100 is attached to the panels 14, 16 using adhesive 30 between the zipper assembly 100 and the panels 14, 16. For example, the adhesive 30 may be a cold seal adhesive applied by a cold seal process, which can be applied without adding heat during the application process. The cold sealing process can increase processing speed and eliminate heat sealing marks and other defects from heat sealing, thus improving the overall look of the finished product.
In an exemplary embodiment, the first and second zipper profile members 104, 106 include respective first and second flanges 108, 110 and respective first and second interlocking members 112, 114. The first and second flanges 108, 110 are configured to be attached to the respective first and second panels 14, 16 using the adhesive 30 during an application process.
The first and second flanges 108, 110 have respective interlocking sides 130, 132 and opposite panel sides 134, 136. The interlocking sides 130, 132 are inward facing. The panel sides 134, 136 are outward facing. The interlocking sides 130, 132 have the corresponding interlocking members 112, 114 extending therefrom, which are configured to releasably engage and release from other interlocking members to alternate between closed and open states of the enclosure 10. The panel sides 134, 136 are configured to be sealed to the corresponding panels 14, 16 of the enclosure 10 to affix the zipper assembly 100 to the enclosure 10.
In the illustrated embodiment, the first interlocking member 112 includes first and second arms 116, 118 that form a female configuration or female interlocking zipper member. The first and second arms 116, 118 form a receptacle or track 120 that receives the second interlocking member 114. The second interlocking member 114 includes a third arm 122 forming a male configuration or male interlocking zipper member. The third arm 122 includes a head 124 received in the track 120. The male zipper member is received and meshes with the female zipper member of the first interlocking member 112. Other types of interlocking members, such as interlocking members having other shapes or interlocking features, may be used in alternative embodiments.
One or more embodiments of the inventive subject matter described herein include posts 40 protruding from the panel sides 134, 136 of the flanges 108, 110 proximate to the sealant area of the adhesive 30. The posts 40 are compressible above a threshold compression force, which may be controlled by selecting the size, shape and type of material of the posts 40 depending on the particular application (for example, typical compressive forces for shipping versus application to the enclosure). The posts 40 are used to prevent inadvertent sealing of the adhesive 30 to other layers of the length of zipper assembly when the zipper assembly is arranged on a supply roll (for example, during shipping and prior to application to the enclosure 10). The posts 40 are configured to prevent compression of the posts 40 and maintain a spatial separation between the panel sides 134, 136 of the flanges 108, 110 and the interlocking side 130, 132 of the flanges 108, 110 of an adjacent layer of the zipper assembly 100 within the supply roll. The posts 40 are configured to collapse upon compression of the posts 40 during sealing of the panel sides 134, 136 of the flanges 108, 110 to the panels 14, 16 of the enclosure 10 to allow the panel sides 134, 136 of the flanges 108, 110 to be sealed to the panels 14, 16. For example, the posts 40 are capable of withstanding a predetermined compression force, which is higher than the compressive forces experienced on the supply roll (for example, approximately ten pounds per square inch) but less than the compressive forces typical of application of the zipper assembly 100 to the enclosure 10 (for example, approximately one hundred pounds per square inch). The posts 40 allow the use of cold seal adhesive by preventing the inadvertent sealing of the adhesive to other portions of the length of the zipper assembly while on the supply roll by maintaining spatial separation of the adhesive from such other elements on the supply roll. The cold sealing process can increase processing speed and eliminate heat sealing marks and other defects from heat sealing, thus improving the overall look of the finished product.
The zipper assembly 100 can be disposed along upper edges 26, 28 of the panels 14, 16, such as by cold sealing the zipper assembly 100 to the upper edges 26, 28 of the panels 14, 16. The zipper assembly 100 can include a slider 102 that is used to open the zipper assembly 100 to provide access into the enclosure 10 and that is used to close the zipper assembly 100 to prevent access into the enclosure 10.
The first and second zipper profile members 104, 106 include the first and second flanges 108, 110 and the respective first and second interlocking members 112, 114 at the interlocking sides 130, 132 of the flanges 108, 110. The panel sides 134, 136, at the outer sides of the flanges 108, 110, are configured to be sealed to the corresponding panels 14, 16 of the enclosure 10. The adhesive 30 is applied in sealant areas 32 along the panel sides 134, 136 of the flanges 108, 110. In the illustrated embodiment, the sealant areas 32 are located above and below the interlocking members 112, 114. However, in alternative embodiments, the sealant areas 32 may be located on the panel sides 134, 136 only above or only below the interlocking members 112, 114. In other various embodiments, the interlocking members 112, 114 may be located at the upper ends of the flanges 108, 110 such that the flanges 108, 110 do not include any portion above the interlocking members 112, 114. In such embodiments, the sealant areas 32 are located only below the interlocking members 112, 114. However, in other various embodiments, the interlocking members 112, 114 may be located at the lower ends of the flanges 108, 110 such that the flanges 108, 110 do not include any portion below the interlocking members 112, 114. In such embodiments, the sealant areas 32 are located only above the interlocking members 112, 114.
With additional reference to
Each post 40 includes a base 42 and a tip 44 at a distal end of the post 40. The post 40 includes a sidewall 46 between the base 42 and the tip 44. The base 42 is provided at the corresponding flange 108, 110. The base 42 may be attached to the flange 108, 110, such as using adhesive. In various embodiments, the post 40 may be manufactured from a foam material. In other various embodiments, the post 40 may be manufactured from a plastic material. In alternative embodiments, rather than being a separate, discrete element attached to the flange 108, 110, the post 40 may be integral with the flange 108, 110, such as being molded or extruded with the flange 108, 110. For example, the post 40 may be manufactured from the same material and during the same forming process as the flange 108, 110.
The post 40 has a width between the base 42 and the tip 44. The width is greater than a thickness of the adhesive 30 such that the tip 44 is positioned to protrude from the corresponding panel side 134, 136 of the flange 108, 110 beyond the outer surface of the adhesive 30. The posts 40 are positioned and protrude from the panel side 134, 136 of the flange 108, 110 such that the posts 40 prevent the cold sealant adhesive 30 disposed on the panel side 134, 136 of the flange 108, 110 from adhering to other structures, such as the interlocking side 130, 132 of the flange 108, 110 when stacked in the layers of the supply roll.
In an exemplary embodiment, the post 40 has a circular cross-section. The post 40 may have a different shape in alternative embodiments. For example, the post 40 may have a triangular cross-section, a rectangular cross-section, or another shape. In various embodiments, the post 40 is pointed having the sidewall 46 tapered with the tip 44 being narrower than the base 42. For example, the post 40 is cone shaped. The post 40 may be round shaped, square shaped, rectangular shaped, or have other shapes. In other various embodiments, rather than being tapered, the sidewall(s) 46 may extend perpendicular relative to the corresponding panel side 134, 136 with the base 42 having the same shape as the tip 44. For example, the post 40 may be columnar. In various embodiments, the posts 400 could be elongated, such as being continuous ribs running along the length of the profile members 104, 106.
In an exemplary embodiment, the posts 40 are one or more of formed of a shape or manufactured from a material that prevents collapse of the posts 40 upon receiving a stacking force, which is a force of stacking the zipper assembly 100 in the supply roll. For example, the posts 40 are one or more of formed of a shape or manufactured from a material that prevents collapse of the posts 40 upon receiving no more than approximately ten pounds per square inch of compressive force. However, the posts 40 may be capable of withstanding a higher compressive force in other embodiments, such as a compressive force of approximately fifty pounds per square inch of compressive force. In other various embodiments, the posts 40 may be capable of withstanding even higher compressive forces, such as a compressive force of approximately one hundred pounds per square inch of compressive force.
In an exemplary embodiment, the posts 40 are configured to collapse upon compression of the posts 40 during cold sealing of the panel side 134, 136 of the flange 108, 110 to the panels 14, 16 of the enclosure 10 to allow the cold sealant adhesive 30 disposed on the panel side 134, 136 to be sealed between the panels 14, 16 and the panel side 134, 136 of the flange 108, 110. In an exemplary embodiment, the posts 40 are one or more of formed of a shape or manufactured from a material that causes the posts 40 to collapse upon receiving a sealing force, which is a force of sealing the zipper assembly 100 to the panel 14, 16 of the enclosure 10. For example, the posts 40 are one or more of formed of a shape or manufactured from a material that causes the posts 40 to collapse upon receiving at least approximately one hundred pounds per square inch of the compressive force. However, the posts 40 may be capable of compressing at lower compressive forces in other embodiments, such as a compressive force of approximately fifty pounds per square inch of compressive force. In other various embodiments, the posts 40 may be capable of compressing at even lower compressive forces, such as a compressive force of at least ten pounds per square inch of compressive force.
In an exemplary embodiment, the first and second zipper profile members 204, 206 include respective first and second flanges 208, 210 and respective first and second interlocking members 212, 214. The first and second flanges 208, 210 are configured to be attached to the respective first and second panels 14, 16 using the adhesive 30 during an application process.
The first and second flanges have respective interlocking sides 230, 232 and opposite panel sides 234, 236. The interlocking sides 230, 232 are inward facing. The panel sides 234, 236 are outward facing. The interlocking sides 230, 232 have the corresponding interlocking members 212, 214 extending therefrom, which are configured to releasably engage and release from other interlocking members to alternate between closed and open states of the enclosure 10. The panel sides 234, 236 are configured to be sealed to the corresponding panels 14, 16 of the enclosure 10 to affix the zipper assembly 200 to the enclosure 10.
In the illustrated embodiment, the first interlocking member 212 includes first and second arms 216, 218 that form a female configuration or female interlocking zipper member. The second interlocking member 214 includes a third arm 224 and a fulcrum 226 forming a male configuration or male interlocking zipper member. The male zipper member is received and meshes with the female zipper member of the first interlocking member 212. Other types of interlocking members, such as interlocking members having other shapes or interlocking features, may be used in alternative embodiments.
The slider 202 includes a top wall 240 and first and second sidewalls 242, 244 which terminate in respective first and second inwardly oriented lips 246, 248. A closing end of the slider 202 includes interior sidewalls 220, 222 that are inclined (as shown in
One or more embodiments of the inventive subject matter described herein include posts 40 protruding from the panel sides 234, 236 of the flanges 208, 210 proximate to the sealant area of the adhesive 30. The posts 40 are used to prevent inadvertent sealing of the adhesive 30 to other layers of the length of zipper assembly when the zipper assembly is arranged on a supply roll (for example, during shipping and prior to application to the enclosure 10). The posts 40 are configured to prevent compression of the posts 40 and maintain a spatial separation between the panel sides 234, 236 of the flanges 208, 210 and the interlocking side 230, 232 of the flanges 208, 210 of an adjacent layer of the zipper assembly 200 within the supply roll. The posts 40 are configured to collapse upon compression of the posts 40 during sealing of the panel sides 234, 236 of the flanges 208, 210 to the panels 14, 16 of the enclosure 10 to allow the panel sides 234, 236 of the flanges 208, 210 to be sealed to the panels 14, 16. For example, the posts 40 are capable of withstanding a predetermined compression force, which is higher than the compressive forces experienced on the supply roll (for example, approximately ten pounds per square inch) but less than the compressive forces typical of application of the zipper assembly 200 to the enclosure 10 (for example, approximately one hundred pounds per square inch). The posts 40 allow the use of cold seal adhesive by preventing the inadvertent sealing of the adhesive to other portions of the length of the zipper assembly while on the supply roll by maintaining spatial separation of the adhesive from such other elements on the supply roll. The cold sealing process can increase processing speed and eliminate heat sealing marks and other defects from heat sealing, thus improving the overall look of the finished product.
The method optionally also can include forming the posts of a shape and/or manufactured from a material that prevents collapse of the posts upon receiving no more than ten pounds per square inch of compressive force. The method optionally also can include forming the posts of a shape and/or manufactured from a material that causes the posts to collapse upon receiving at least one hundred pounds per square inch of the compressive force. The method optionally also can include forming the posts at a position to protrude from the panel side of the flange such that the posts prevent a cold sealant adhesive disposed on the panel side of the flange from adhering to the interlocking side of the flange while the zipper assembly is on the supply roll. The method optionally also can include forming the posts to have one or more of a pointed shape, a rounded shape, or a square shape.
In one embodiment, a zipper assembly for an enclosure includes a flange having an interlocking side and an opposite panel side. The interlocking side has interlocking members configured to releasably engage and release from other interlocking members to alternate between closed and open states of the enclosure. The panel side is configured to be sealed to panels of the enclosure to affix the zipper assembly to the enclosure. The zipper assembly includes posts protruding from the panel side of the flange. The posts are configured to prevent compression of the posts and maintain a spatial separation between the panel side of the flange and the interlocking side of the flange while the zipper assembly is wound onto a supply roll. The posts are configured to collapse upon compression of the posts during sealing of the panel side of the flange to the panels of the enclosure to allow the panel side of the flange to be sealed to the panels.
Optionally, the posts are one or more of formed of a shape or manufactured from a material that prevents collapse of the posts upon receiving no more than ten pounds per square inch of compressive force.
Optionally, the posts are one or more of formed of the shape or manufactured from the material that causes the posts to collapse upon receiving at least one hundred pounds per square inch of the compressive force.
Optionally, the posts configured to collapse upon compression of the posts during cold sealing of the panel side of the flange to the panels of the enclosure to allow a cold sealant adhesive disposed on one or more of the panel side of the flange or the panels to be sealed between the panels and the panel side of the flange.
Optionally, the posts are positioned and protrude from the panel side of the flange such that the posts prevent a cold sealant adhesive disposed on the panel side of the flange from adhering to the interlocking side of the flange.
Optionally, the posts protrude from the panel side of the flange in sealant areas that are not opposite the interlocking members protruding from the interlocking side of the flange.
Optionally, the posts have one or more of a pointed shape, a rounded shape, or a square shape.
In another embodiment, a method for forming a zipper assembly for an enclosure includes forming the zipper assembly to have a flange with an interlocking side and an opposite panel side. The flange is formed with interlocking members protruding from the interlocking side and positioned to releasably engage and release from other interlocking members to alternate between closed and open states of the enclosure. The flange also is formed with the panel side positioned to be sealed to panels of the enclosure to affix the zipper assembly to the enclosure. The zipper assembly is formed to have posts protruding from the panel side of the flange. The posts are formed to prevent compression of the posts and maintain a spatial separation between the panel side of the flange and the interlocking side of the flange while the zipper assembly is wound onto a supply roll. The posts are formed to collapse upon compression of the posts during sealing of the panel side of the flange to the panels of the enclosure to allow the panel side of the flange to be sealed to the panels.
Optionally, the posts are one or more of formed of a shape or formed from a material that prevents collapse of the posts upon receiving no more than ten pounds per square inch of compressive force.
Optionally, the posts are one or more of formed of the shape or formed from the material that causes the posts to collapse upon receiving at least one hundred pounds per square inch of the compressive force.
Optionally, the posts are formed to collapse upon compression of the posts during cold sealing of the panel side of the flange to the panels of the enclosure to allow a cold sealant adhesive disposed on one or more of the panel side of the flange or the panels to be sealed between the panels and the panel side of the flange.
Optionally, the method includes applying a cold sealant adhesive to the panel side of the flange, wherein the posts are formed in locations to protrude from the panel side of the flange such that the posts prevent the cold sealant adhesive on the panel side of the flange from adhering to the interlocking side of the flange.
Optionally, the posts are formed to protrude from the panel side of the flange in sealant areas that are not opposite the interlocking members protruding from the interlocking side of the flange.
Optionally, the posts are formed to have one or more of a pointed shape, a rounded shape, or a square shape.
In a further embodiment, a zipper assembly for an enclosure includes a flange having an interlocking side and an opposite panel side. The interlocking side has interlocking members protruding from first areas of the interlocking side and shaped to releasably engage and release from other interlocking members to alternate between closed and open states of the enclosure. The panel side is configured to be cold sealed to panels of the enclosure to affix the zipper assembly to the enclosure. The zipper assembly includes posts protruding from the panel side of the flange in second areas of the flange side. The posts are configured to prevent compression of the posts and maintain a spatial separation between the panel side of the flange and the interlocking side of the flange while the zipper assembly is wound onto a supply roll. The posts are configured to collapse upon compression of the posts during cold sealing of the panel side of the flange to the panels of the enclosure to allow the panel side of the flange to be sealed to the panels.
Optionally, the posts are one or more of formed of a shape or manufactured from a material that prevents collapse of the posts upon receiving no more than ten pounds per square inch of compressive force.
Optionally, the posts are one or more of formed of the shape or manufactured from the material that causes the posts to collapse upon receiving at least one hundred pounds per square inch of the compressive force.
Optionally, the posts are positioned and protrude from the panel side of the flange such that the posts prevent a cold sealant adhesive disposed on the panel side of the flange from adhering to the interlocking side of the flange while the zipper assembly is on the supply roll.
Optionally, the first and second areas are non-overlapping areas.
Optionally, the posts have one or more of a pointed shape, a rounded shape, or a square shape.
The singular forms “a”, “an”, and “the” include plural references unless the context clearly dictates otherwise. “Optional” or “optionally” means that the subsequently described event or circumstance may or may not occur, and that the description may include instances where the event occurs and instances where it does not. Approximating language, as used herein throughout the specification and claims, may be applied to modify any quantitative representation that could permissibly vary without resulting in a change in the basic function to which it may be related. Accordingly, a value modified by a term or terms, such as “about,” “substantially,” and “approximately,” may be not to be limited to the precise value specified. In at least some instances, the approximating language may correspond to the precision of an instrument for measuring the value. Here and throughout the specification and claims, range limitations may be combined and/or interchanged, such ranges may be identified and include all the sub-ranges contained therein unless context or language indicates otherwise.
This written description uses examples to disclose the embodiments, including the best mode, and to enable a person of ordinary skill in the art to practice the embodiments, including making and using any devices or systems and performing any incorporated methods. The claims define the patentable scope of the disclosure, and include other examples that occur to those of ordinary skill in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal language of the claims.
This application claims priority to U.S. Provisional Application No. 63/434,151 (filed 21 Dec. 2022), the entire disclosure of which is incorporated herein by reference.
| Number | Date | Country | |
|---|---|---|---|
| 63434151 | Dec 2022 | US |
