Patent US4877473A successfully refreshed from Google Patents.
US4877473A
Expired / Lapsed
US
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Method of making a bag pack
Assignee: PCL PACKAGING Inc
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Filing: 1988-02-16
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Granted: 1989-10-31
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Expires: 2008-02-16
Abstract
Abstract In the bag pack disclosed herein, a plurality of thermoplastic "T-shirt-type" carry bags are joined together in a pack by both a hot weld around a central rack-mounting aperture and also by readily frangible pressure bonds linking the film layers forming the bag handles to allow for handle support while on a rack dispensing system. A "pull tab" adjacent the aperture is provided to allow easy opening of each bag in the pack.
Inventors
- 👤 Michael Snowdon
- 👤 Jay Shapiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:07
CPC Classifications
B; B65; B65D; B65D33/00; B65D33/001; B31; B31B; B31B70/00; B31B70/14; B31B70/60; B31B70/64; B31B70/642; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1015; Y10T156/1051; Y10T156/1052
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
148 words
The method of forming a bag pack comprising: forming a flattened gusseted tube of thermoplastic film; heat sealing and cutting said tube along transverse lines at periodic intervals thereby to form enclosures; stacking a plurality of said enclosures; at one end of the enclosures in the stack, cutting out a central portion thereof overlapping the gusset regions thereby to form from each enclosure a bag having front and back walls defining an article receiving opening with loop handles at each side of the opening; aperturing said handles intermediate said article receiving openings and the distal ends of said handles for receiving spaced support rods for holding the pack for dispensing; and applying pressure locally without heat at a point intermediate said support rod receiving aperture and the distal end of the handle thereby to form a frangible pressure bond linking the film layers forming each of said handles.
Claim 2
Independent Claim
148 words
The method of forming a bag pack comprising: forming a flattened gusseted tube of thermoplastic film; heat sealing and cutting said tube along transverse lines at periodic intervals thereby to form enclosures; stacking a plurality of said enclosures; at one end of the enclosures in the stack, cutting out a central portion thereof overlapping the gusset regions thereby to form from each enclosure a bag having front and back walls defining an article receiving opening with loop handles at each side of the opening; aperturing said handles intermediate said article receiving openings and the distal ends of said handles for receiving spaced support rods for holding the pack for dispensing; and applying pressure locally without heat at a point intermediate said support rod receiving aperture and the distal end of the handle thereby to form a frangible pressure bond linking the film layers forming each of said handles.
Claim 3
Dependent Claim
27 words
The method as set forth in claim 1 wherein the central portion cut out also provides for a mounting tab upstanding from the front and back walls.
Claim 4
Dependent Claim
40 words
The method as set forth in claim 2 further comprising the step of cutting a hook receiving aperture in the distal part of said tab and for heat bonding together the tabs in a pack around said hook receiving aperture.
Claim 5
Dependent Claim
78 words
The method as set forth in claim 3 further comprising the step of slitting said tabs across a majority of their width along a line which traverses each tab below the hook receiving apertures leaving an easily tearable region on each side of the slit, the slit including an upwardly arched central portion forming a pull tab which is easily separated from the pack and grasped to permit the front wall to be pulled away from the pack.
Claim 6
Independent Claim
229 words
The method of forming a bag pack comprising: forming a flattened gusseted tube of thermoplastic film; heat sealing and cutting said tube along transverse lines at periodic intervals thereby to form enclosures; stacking a plurality of said enclosures; at one end of the enclosures in the stack, cutting out a generally rectangular central portion thereof overlapping the gusset regions thereby to form from each enclosure a bag having front and back walls defining an article receiving opening with loop handles at each side of the opening, said central portion cut out also providing for a mounting tab upstanding from the front and back walls; cutting a hook receiving aperture in the distal part of said tab and for heat bonding together the tabs in a pack adjacent said hook receiving aperture; slitting said tabs across a majority of their width along a line which traverses each tab below the hook receiving apertures leaving an easily tearable region on each side of the slit, the slit including an upwardly arched central portion forming a pull tab which is easily separated from the pack and grasped to permit the front wall to be pulled away from the pack; and aperturing said handles adjacent the cut out central portion intermediate said article receiving openings and the distal ends of said handles for receiving spaced support rods for holding the pack for dispensing.
Claim 7
Independent Claim
229 words
The method of forming a bag pack comprising: forming a flattened gusseted tube of thermoplastic film; heat sealing and cutting said tube along transverse lines at periodic intervals thereby to form enclosures; stacking a plurality of said enclosures; at one end of the enclosures in the stack, cutting out a generally rectangular central portion thereof overlapping the gusset regions thereby to form from each enclosure a bag having front and back walls defining an article receiving opening with loop handles at each side of the opening, said central portion cut out also providing for a mounting tab upstanding from the front and back walls; cutting a hook receiving aperture in the distal part of said tab and for heat bonding together the tabs in a pack adjacent said hook receiving aperture; slitting said tabs across a majority of their width along a line which traverses each tab below the hook receiving apertures leaving an easily tearable region on each side of the slit, the slit including an upwardly arched central portion forming a pull tab which is easily separated from the pack and grasped to permit the front wall to be pulled away from the pack; and aperturing said handles adjacent the cut out central portion intermediate said article receiving openings and the distal ends of said handles for receiving spaced support rods for holding the pack for dispensing.
References Cited (Backward Citations)
CA976397A
Cited
US4676378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-30 | 1993-05-01 | 1993-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-30 | 1997-05-01 | 1997-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-30 | 2001-05-01 | 2001-10-31 | $7700.00 | Window Closed / Lapsed |