Patent US4787754A successfully refreshed from Google Patents.
US4787754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reclosable flexible bags having fastener profiles attached to exterior walls thereof and a method of making same
Assignee: Pactiv LLC
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Filing: 1988-03-01
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Granted: 1988-11-29
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Expires: 2008-03-01
Abstract
Abstract This invention provides a reclosable flexible bag having a tape of greater thickness around its opening portion. On the surfaces of the tape facing the bag, fastener profiles are provided to seal the bag by pinching the bag walls therebetween.
Inventors
- 👤 Fox J. Herrington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:18
CPC Classifications
B; B65; B65D; B65D33/00; B65D33/16; B65D33/25; B65D33/2508; B65D33/2541; Y; Y10; Y10S; Y10S24/00; Y10S24/30; Y10S24/50; Y10T; Y10T24/00; Y10T24/45; Y10T24/45152; Y10T24/45157; Y10T24/45168
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
126 words
A reclosable flexible bag comprising: a pouch having front and back walls and a pouch opening at the upper edge thereof; a first fastener profile comprising a first tape having first and second edges and a protrusion disposed along the first edge and extending from the surface of the tape; a second fastener profile comprising a second tape having first and second edges and a substantially C-shaped member disposed along the first edge and extending from the surface of the tape; the second edges of the first and second tapes being affixed to the exterior of the walls of the pouch and parallel to the pouch opening so that upon closing, the protrusion and C-shaped members interlock, with the front and back walls being interposed therebetween.
Claim 2
Dependent Claim
126 words
A reclosable flexible bag comprising: a pouch having front and back walls and a pouch opening at the upper edge thereof; a first fastener profile comprising a first tape having first and second edges and a protrusion disposed along the first edge and extending from the surface of the tape; a second fastener profile comprising a second tape having first and second edges and a substantially C-shaped member disposed along the first edge and extending from the surface of the tape; the second edges of the first and second tapes being affixed to the exterior of the walls of the pouch and parallel to the pouch opening so that upon closing, the protrusion and C-shaped members interlock, with the front and back walls being interposed therebetween.
Claim 3
Dependent Claim
21 words
The bag of claim 1 wherein the first and second tapes have a thickness greater than that of the pouch walls.
Claim 4
Dependent Claim
15 words
The bag of claim 1 wherein the first and second fastener profiles are integrally formed.
Claim 5
Dependent Claim
20 words
The bag of claim 1 wherein the fastener profiles and the pouch walls are formed of the same thermoplastic material.
Claim 6
Dependent Claim
12 words
The bag of claim 4 wherein the material is polyethylene or polyproplylene.
Claim 7
Independent Claim
166 words
A method of manufacturing a plurality of reclosable flexible bags comprising: advancing a double web of thermoplastic film material having a first wall and a second wall; advancing a first fastener profile into proximity with the top portion of the exterior of the first wall, the first fastener profile comprising a first tape having first and second edges and a protrusion disposed along the first edge and extending from the surface thereof; advancing a second fastener profile into proximity with the top portion of the exterior of the second wall, the second fastener profile comprising a second tape having first and second edges and a substantially C-shaped member disposed along the first edge and extending from the surface thereof; affixing the second edges of the first and second tapes to the upper edge of the double web so that when the fastener profiles interlock, the first and second walls are interposed therebetween; sealing transversely across the web at intervals to form a pluraltiy of interconnected bags.
Claim 8
Independent Claim
166 words
A method of manufacturing a plurality of reclosable flexible bags comprising: advancing a double web of thermoplastic film material having a first wall and a second wall; advancing a first fastener profile into proximity with the top portion of the exterior of the first wall, the first fastener profile comprising a first tape having first and second edges and a protrusion disposed along the first edge and extending from the surface thereof; advancing a second fastener profile into proximity with the top portion of the exterior of the second wall, the second fastener profile comprising a second tape having first and second edges and a substantially C-shaped member disposed along the first edge and extending from the surface thereof; affixing the second edges of the first and second tapes to the upper edge of the double web so that when the fastener profiles interlock, the first and second walls are interposed therebetween; sealing transversely across the web at intervals to form a pluraltiy of interconnected bags.
Claim 9
Dependent Claim
18 words
The method of claim 6 wherein the interconnected bags are severed to form a plurality of individual bags.
Claim 10
Dependent Claim
23 words
The method of claim 6 wherein the thermoplastic film material is in the form of a tube severed to form two double webs.
Claim 11
Dependent Claim
22 words
The method of claim 6 wherein the thermoplastic film material is folded along the longitudinal axis thereof to form the double web.
Claim 12
Dependent Claim
23 words
The method of claim 6 wherein the film material and the first and second fastener profiles are formed of the same thermoplastic material.
Claim 13
Dependent Claim
13 words
The method of claim 10 wherein the thermoplastic material is polyethylene or polypropylene.
Claim 14
Dependent Claim
20 words
The method of claim 6 wherein the first and second tapes have a thickness greater than that of the web.
Claim 15
Dependent Claim
12 words
The method of claim 6 werein the affixing is conducted by heat.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-29 | 1992-05-30 | 1992-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-29 | 1996-05-30 | 1996-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-29 | 2000-05-30 | 2000-11-29 | $7700.00 | Window Closed / Lapsed |