US4759639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic bag
Assignee: Superbag Corp
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Filing: 1986-11-24
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Granted: 1988-07-26
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Expires: 2006-11-24
Abstract
Abstract The present invention relates to thermoplastic bags which are characterized by two perforated tabs symetrically attached to the front and back walls at the mouth of the bag. Using a sculptured bag or any of several thermoplastic bag structures currently in use (handled or flush-cut; gussetted or flat), the configuration of the two tabs is such that it enables the user to easily open and load the bag while the mouth remains open and the bag in place. Additionally, the placement of the two tabs permits easy loading of a unitary pack on dispensing holders, including armless stands, resulting in more efficient use of time and space by retail users. The placement and scallop design of the tab perforations create stress transfer tips which distribute stress away from creases and slit-seals at the open mouth, preventing tearing or zippering at the mouth of the bag where stress concentration is most likely and permitting greater use of slit-seals and corresponding reduced costs of manufacture.
Inventors
- 👤 Robert B. DeMatteis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:27
CPC Classifications
B; B65; B65D; B65D33/00; B65D33/14; B65D33/001; Y; Y10; Y10S; Y10S383/00; Y10S383/903
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
87 words
A thermoplastic bag comprising a front bag wall and a rear bag wall and an open mouth portion, said bag having perforated tabs symetrically placed at opposite outer corners of the open mouth portion, the perforated tabs having a hole therethrough, the front and rear bag walls having handle aperture therethrough for use in grasping the bag, the handle aperture located between the tabs said tab perforations being cut out in a scalloped shape to form stress transfer tips at the opposite ends of the open mouth.
Claim 2
Dependent Claim
87 words
A thermoplastic bag comprising a front bag wall and a rear bag wall and an open mouth portion, said bag having perforated tabs symetrically placed at opposite outer corners of the open mouth portion, the perforated tabs having a hole therethrough, the front and rear bag walls having handle aperture therethrough for use in grasping the bag, the handle aperture located between the tabs said tab perforations being cut out in a scalloped shape to form stress transfer tips at the opposite ends of the open mouth.
Claim 3
Dependent Claim
23 words
A thermoplastic bag structure in accordance with claim 1 wherein said front and rear walls are joined together by an intergral pleat portion.
Claim 4
Dependent Claim
30 words
A thermoplastic bag structure as recited in claim 1 being characterized by having a hole located near the perforation of each tab, which hole is capable of accepting rod holders.
Claim 5
Dependent Claim
24 words
A thermoplastic bag structure as recited in claims claim 1 being characterized by having a curved rise at the center of the open mouth.
Claim 6
Dependent Claim
78 words
A thermoplastic bag comprising a front bag wall and a rear bag wall joined at a bottom and at side pleat portions, the bag walls defining an open mouth portion and also defining handles located on opposite sides of the open mouth portion, the bag walls having a curved rise between the handles, the side pleat portions folded substantially into the curved rise between the handles wherein the corresponding curve in the pleat portions forms stress transfer tips.
Claim 7
Dependent Claim
78 words
A thermoplastic bag comprising a front bag wall and a rear bag wall joined at a bottom and at side pleat portions, the bag walls defining an open mouth portion and also defining handles located on opposite sides of the open mouth portion, the bag walls having a curved rise between the handles, the side pleat portions folded substantially into the curved rise between the handles wherein the corresponding curve in the pleat portions forms stress transfer tips.
Claim 8
Dependent Claim
16 words
The thermoplastic bag of claim 5 further comprising tabs on the inner periphery of the handles.
Claim 9
Dependent Claim
16 words
The thermoplastic bag of claim 6 wherein said tabs are detachable from the handles at perforations.
Claim 10
Dependent Claim
24 words
The thermoplastic bag of claim 7 wherein the tabs are located approximately half-way between the top of the handles and the open mouth portion.
Claim 11
Dependent Claim
40 words
A thermoplastic bag structure as recited in claim 7 wherein said tabs are characterized by having an extended portion between the perforation and the handle, which extension is characterized by a hole, which hole is capable of accepting rod holders.
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) | 1991-07-26 | 1992-01-25 | 1992-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-26 | 1996-01-25 | 1996-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-26 | 2000-01-25 | 2000-07-26 | $7700.00 | Window Closed / Lapsed |