US3593483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a package with easy opening device
Assignee: Kartridg Pak Co
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Filing: 1969-07-28
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Granted: 1971-07-20
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Expires: 1989-07-28
Abstract
Abstract A package and a method of forming the same wherein a plastic film is formed into a tube and filled with a flowable product, margins of the film being overlapped and sealed with a tear strip in the seam thus formed which is fabricated of a material having a tear strength greater than the film, which has a width sufficient to extend along both sides of the seal line and a length sufficient to extend the full length of the package so that the ends thereof are anchored in the ends of the package which are gathered and sealed with bendable clips of metal or similar material. A pair of longitudinally spaced transverse slits are cut in the outside edge of the tear strip and the film margin to facilitate tearing either circumferentially or longitudinally so as to open the package.
Inventors
- 👤 Alan C Tracy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:30
CPC Classifications
B; B65; B65B; B65B61/00; B65B61/18; B65B61/182; A; A22; A22C; A22C13/00; A22C2013/0036
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
173 words
A method of fabricating a package which comprises forming a tube of relatively thin, plastic film material having substantial resistance to tearing by overlapping side margins of the film and heat sealing the same to provide a longitudinal seam, feeding a tear strip between the overlapped side margins prior to the sealing of the overlapped margins with the tear strip positioned relative to the overlapped margins so that it spans the sealed area joining the same and a side edge thereof projects beyond the seam a sufficient distance to permit it to be readily grasped and pulled back across the seam area so as to tear open the same, cutting a pair of transverse slits in the tear strip which extend into the outermost film margin so as to facilitate tearing either around the tube or along the longitudinal seam, filling the tube with a predetermined quantity of flowable product and closing off and sealing the ends thereof with the ends of the tear strip extending into the sealed ends of the tube.
Claim 2
Independent Claim
173 words
A method of fabricating a package which comprises forming a tube of relatively thin, plastic film material having substantial resistance to tearing by overlapping side margins of the film and heat sealing the same to provide a longitudinal seam, feeding a tear strip between the overlapped side margins prior to the sealing of the overlapped margins with the tear strip positioned relative to the overlapped margins so that it spans the sealed area joining the same and a side edge thereof projects beyond the seam a sufficient distance to permit it to be readily grasped and pulled back across the seam area so as to tear open the same, cutting a pair of transverse slits in the tear strip which extend into the outermost film margin so as to facilitate tearing either around the tube or along the longitudinal seam, filling the tube with a predetermined quantity of flowable product and closing off and sealing the ends thereof with the ends of the tear strip extending into the sealed ends of the tube.
Claim 3
Independent Claim
221 words
A method of fabricating a package which comprises forming into a continuous tube a web of relatively thin, plastic film material having substantial resistance to tearing by overlapping side marginal portions of the film material and heat sealing the same to provide a longitudinal seam, feeding a continuous tear strip having a tensile strength greater than the film material between the overlapped side marginal portions of the film material prior to the sealing of the overlapped marginal portions which tear strip has sufficient width and is positioned relative to the overlapped marginal film portions so that a portion of said tear strip is in the longitudinal seam forming area and a side edge thereof projects outside of said seam forming area a sufficient distance to permit it to be readily grasped and pulled back across the seam thereby to tear open the package, heat sealing the film and tear strip material so as to connect the same in the longitudinal seam forming area and leaving said side edge of the tear strip which projects outside of said seam forming area free so that it may be readily grasped, filling the tube with a predetermined quantity of flowable product and closing off and sealing the ends thereof with the ends of the tear strip extending into the sealed ends of the tube.
Claim 4
Independent Claim
221 words
A method of fabricating a package which comprises forming into a continuous tube a web of relatively thin, plastic film material having substantial resistance to tearing by overlapping side marginal portions of the film material and heat sealing the same to provide a longitudinal seam, feeding a continuous tear strip having a tensile strength greater than the film material between the overlapped side marginal portions of the film material prior to the sealing of the overlapped marginal portions which tear strip has sufficient width and is positioned relative to the overlapped marginal film portions so that a portion of said tear strip is in the longitudinal seam forming area and a side edge thereof projects outside of said seam forming area a sufficient distance to permit it to be readily grasped and pulled back across the seam thereby to tear open the package, heat sealing the film and tear strip material so as to connect the same in the longitudinal seam forming area and leaving said side edge of the tear strip which projects outside of said seam forming area free so that it may be readily grasped, filling the tube with a predetermined quantity of flowable product and closing off and sealing the ends thereof with the ends of the tear strip extending into the sealed ends of the tube.
Claim 5
Dependent Claim
59 words
A method of fabricating a package as set forth in claim 2 and feeding a tear strip between the side marginal portions of the film material which is in the form of surface bonded laminations, and sealing the outside laminations of said tear strip to the overlapped marginal portions of the film material in the forming the longitudinal seam.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |