US3687352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Container closure
Assignee: Pneumatic Scale Corp
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Filing: 1971-03-08
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Granted: 1972-08-29
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Expires: 1991-03-08
Abstract
Abstract A container closure is disclosed for a single service, or nonreuseable, container. In the preferred form of the invention the container has a pair of wall sections made of paper material and placed in side-by-side relationship, the outer surfaces of these wall sections being coated with polyethylene. A closure strip having its inner surface coated with polyethylene is bonded to both of the wall sections by application of suitable heat and pressure. The polyethylene coating on the inner surface of the closure strip is substantially thicker than the coating on the outer surfaces of the wall sections, hence the application of heat and pressure for bonding the coatings together also causes the coating of the closure strip to permeate much more deeply into the material of the closure strip and thereby become more securely bonded to the closure strip than the coatings of the wall sections are bonded to the wall sections. A pull tab on the closure strip is used to pull the strip, resulting in tearing of the coatings from the wall sections, so that the wall sections are no longer joined together.
Inventors
- 👤 Edward Kalajian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:34
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/42; B65D5/70; B65D5/708; B65D5/54; B65D5/5475
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
168 words
A container closure comprising a pair of wall sections disposed in a common plane to form respective portions of a flat wall, each of said wall sections having a coating on its exterior surface, an elongated closure strip having an inner surface with a coating thereon, said closure strip having a portion of its length positioned in engagement with both of said wall sections and said coating on said inner surface of said closure strip being bonded to said coatings on said exterior surfaces of both of said wall sections, said closure strip also having a pull tab portion that is not bonded to said wall sections, the coating on said closure strip being more firmly secured to said closure strip than the coatings on said wall sections are secured to said wall sections, so that when said pull tab portion of said closure strip is grasped and pulled the coatings on said wall sections are torn away so that said wall sections are no longer joined together.
Claim 2
Dependent Claim
168 words
A container closure comprising a pair of wall sections disposed in a common plane to form respective portions of a flat wall, each of said wall sections having a coating on its exterior surface, an elongated closure strip having an inner surface with a coating thereon, said closure strip having a portion of its length positioned in engagement with both of said wall sections and said coating on said inner surface of said closure strip being bonded to said coatings on said exterior surfaces of both of said wall sections, said closure strip also having a pull tab portion that is not bonded to said wall sections, the coating on said closure strip being more firmly secured to said closure strip than the coatings on said wall sections are secured to said wall sections, so that when said pull tab portion of said closure strip is grasped and pulled the coatings on said wall sections are torn away so that said wall sections are no longer joined together.
Claim 3
Dependent Claim
48 words
A container closure as claimed in claim 1 wherein said wall sections and said closure strip are made of a paper material, and each of said coatings is made of a chemical composition capable of being bonded to the paper material as well as to the other coating.
Claim 4
Dependent Claim
28 words
A container closure as claimed in claim 2 wherein said coatings are bonded to the paper material and to each other by the application of heat and pressure.
Claim 5
Dependent Claim
82 words
A container closure as claimed in claim 3 wherein the coating on said inner surface of said closure strip is substantially thicker than the coatings on the exterior surfaces of said wall sections, whereby the application of heat and pressure in the bonding of said closure strip to said wall sections causes a greater permeation of said closure strip coating into the material of said closure strip, thereby resulting in a stronger bond of said closure strip coating to said closure strip.
Claim 6
Dependent Claim
15 words
The container closure as claimed in claim 2 wherein said coatings are made of polyethylene.
Claim 7
Dependent Claim
94 words
A container closure as claimed in claim 1 which further includes an opening flap located between said wall sections and disposed in said common plane thereof, said opening flap also having a coating on its exterior surface, and said coating on said inner surface of said closure strip being bonded to said coating on the exterior surface of said opening flap; the operation being such that when said pull tab portion of said closure strip is pulled, said opening flap is pulled away from said wall sections to provide an opening to the container.
Claim 8
Dependent Claim
58 words
The container closure claimed in claim 6 wherein said wall sections and said opening flap constitute respective portions of a single sheet member, said opening flap being formed by means of an essentially U-shaped cut in said sheet member, said closure strip being bonded to the surface of said member around the entire periphery of said opening flap.
Claim 9
Dependent Claim
48 words
A container incorporating the container closure of claim 1, said container including a pair of open-topped rectangular cartons disposed in aligned relationship with their open tops in mating engagement, said closure strip of claim 1 being bonded to the peripheries of said open tops for holding them together.
Claim 10
Dependent Claim
46 words
A container closure as claimed in claim 1, wherein said coatings of said wall sections are scored along score lines located adjacent the edges of said closure strip, whereupon the pulling of the closure strip causes said wall section coatings to tear along the score lines.
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |