Patent US4604084A successfully refreshed from Google Patents.
US4604084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic bag, bag pack and method of making the same
Assignee: Mobil Oil AS
•
Filing: 1985-05-29
•
Granted: 1986-08-05
•
Expires: 2005-05-29
Abstract
Abstract A thermoplastic bag structure comprising a front and rear bag wall, a bottom and an open mouth top portion, said open mouth portion being characterized by having two pairs of single film handle loops each of which are located at opposite ends of said open mouth portion, the handles of each pair being side-by-side and each handle is an integral single film loop extension of said front and rear bag walls. The bag structures can be unitized by providing a detachable tab at the bag mouth opening and unitizing the bag structures through this tab. The method of forming said bags involves providing an end sealed collapsed thermoplastic film tube and removing plastic to form a bag mouth opening and handles at one end thereof. The resulting bag is an ungussetted bag which can be unitized into a pack by providing a detachable, unitizing tab at the bag mouth opening.
Inventors
- 👤 Timothy W. Pistner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:15
CPC Classifications
B; B65; B65D; B65D33/00; B65D33/001; B65D33/06; B65D33/065; B29; B29C; B29C65/00; B29C65/02; B29C65/08; B29L; B29L2009/00; B29L2031/00; B29L2031/712; B29L2031/7128; Y; Y10; Y10S; Y10S493/00; Y10S493/901; Y10S493/909
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
76 words
A method for forming a thermoplastic film handled sack comprising: (a) forming a collapsed thermoplastic film tube, heat-sealed transversely at each end thereof; (b) folding opposite sides of the sealed tube toward but spaced from each other, along lines perpendicular to said heat-seals; and (c) removing, from one end of the folded structure, sufficient film to form a bag mouth opening and a pair of single-film handle loops at opposite ends of said bag mouth opening.
Claim 2
Independent Claim
76 words
A method for forming a thermoplastic film handled sack comprising: (a) forming a collapsed thermoplastic film tube, heat-sealed transversely at each end thereof; (b) folding opposite sides of the sealed tube toward but spaced from each other, along lines perpendicular to said heat-seals; and (c) removing, from one end of the folded structure, sufficient film to form a bag mouth opening and a pair of single-film handle loops at opposite ends of said bag mouth opening.
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein the film removal is accomplished by a cutting action.
Claim 4
Independent Claim
116 words
A method for forming a pack of thermoplastic film handled sacks comprising: (a) forming a collapsed thermoplastic film tube, heat-sealed transversely at each end thereof; (b) folding opposite sides of the sealed tube toward but spaced from each other, along lines perpendicular to said heat-seals; (c) stacking a plurality of such folded structures one upon the other in registration; and (d) simultaneously performing a cutting, perforating and unitizing operation at one end of the stack that will form two pairs of single film loop handles with a bag mouth opening therebetween and tab members attached by way of film perforations to said bag mouth opening, said tab members being unitized, thereby forming said pack of sacks.
Claim 5
Independent Claim
116 words
A method for forming a pack of thermoplastic film handled sacks comprising: (a) forming a collapsed thermoplastic film tube, heat-sealed transversely at each end thereof; (b) folding opposite sides of the sealed tube toward but spaced from each other, along lines perpendicular to said heat-seals; (c) stacking a plurality of such folded structures one upon the other in registration; and (d) simultaneously performing a cutting, perforating and unitizing operation at one end of the stack that will form two pairs of single film loop handles with a bag mouth opening therebetween and tab members attached by way of film perforations to said bag mouth opening, said tab members being unitized, thereby forming said pack of sacks.
Claim 6
Dependent Claim
21 words
The method of claim 3 wherein said tabs are unitized by heat sealing and a suspension orifice is also formed therein.
References Cited (Backward Citations)
US3485439A
Cited
US3729361A
Cited
US3685643A
Cited
FR2469355A1
Cited
US4476979A
Cited
US4493419A
Cited
US4529090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-04 | 1990-02-03 | 1990-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-04 | 1994-02-03 | 1994-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-04 | 1998-02-03 | 1998-08-05 | $7700.00 | Window Closed / Lapsed |