US4159077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for closing a flexible container and the container formed thereby
Assignee: WR Grace and Co
•
Filing: 1976-12-09
•
Granted: 1979-06-26
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Expires: 1996-12-09
Abstract
Abstract The opening of a flexible container is closed by gathering the portion defining the opening into a bunch, surrounding the opening with an adhesive and allowing the adhesive to harden.
Inventors
- 👤 Stanley D. Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:33
CPC Classifications
B; B65; B65B; B65B51/00; B65B51/02; B65B7/00; B65B7/02; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/108
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
70 words
A process for closing a flexible container, said flexible container terminating in a portion defining an opening comprising the steps of: gathering said portion defining an opening into a bunch; applying to the end of the gathered bunch a flowable adhesive in the liquid state to surround said opening on the exterior of said container with said flowable adhesive; and hardening said adhesive into hermetic sealing engagement with said opening.
Claim 2
Dependent Claim
70 words
A process for closing a flexible container, said flexible container terminating in a portion defining an opening comprising the steps of: gathering said portion defining an opening into a bunch; applying to the end of the gathered bunch a flowable adhesive in the liquid state to surround said opening on the exterior of said container with said flowable adhesive; and hardening said adhesive into hermetic sealing engagement with said opening.
Claim 3
Dependent Claim
37 words
The process, according to claim 1, comprising, after said step of gathering, the further step of severing excess container from said bunch to thus provide a new opening for carrying out said steps of applying and hardening.
Claim 4
Dependent Claim
31 words
The process, according to claim 1, wherein said flowable adhesive is a thermoplastic resin and said step of hardening comprises the step of cooling said flowable adhesive into a hardened mass.
Claim 5
Dependent Claim
41 words
The process, according to claim 3, wherein said thermoplastic resin is an ionomer resin and said step of applying is carried out with said ionomer resin in a liquid state at a temperature within the range of 300° to 350° F.
Claim 6
Dependent Claim
32 words
The process, according to claim 3, wherein said thermoplastic resin is an amide polymer and said step of applying is carried out with said amide polymer at a temperature above 400° F.
Claim 7
Dependent Claim
25 words
The process, according to claim 3, wherein said adhesive is a hot melt adhesive at a temperature within the range of 200° to 300° F.
Claim 8
Dependent Claim
41 words
The process according to claim 1 comprising carrying out said step of gathering by closing a die about said portion defining an opening and carrying out said step of applying by filling the cavity of said die with said flowable adhesive.
Claim 9
Dependent Claim
32 words
The process according to claim 7 including the further step of severing excess bag prior to said step of applying and while said portion defining an opening is enclosed within said die.
Claim 10
Dependent Claim
10 words
A closed container produced by the process of claim 1.
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) | 1982-06-25 | 1982-12-25 | 1983-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-25 | 1986-12-25 | 1987-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-25 | 1990-12-25 | 1991-06-26 | $7700.00 | Window Closed / Lapsed |