US2994631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming stitched end closures for paper bags
Assignee: Bemis Brothers Bag Co
•
Filing: 1956-06-06
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Granted: 1961-08-01
•
Expires: 1976-06-06
Abstract
No abstract record available.
Inventors
- 👤 August F Ottinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:48
CPC Classifications
B; B65; B65D; B65D33/00; B65D33/16; B65D33/26; B65B; B65B51/00; B65B51/04; B65B51/06; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1034; Y10T156/1043; Y10T156/1049; Y10T428/00; Y10T428/24; Y10T428/24033; Y10T428/24041; Y10T428/2405
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
THE METHOD OF FORMING A CLOSURE FOR AN END OF A PAPER BAG COMPRISING FOLDING A PAPER TAPE AROUND SAID END OF THE BAG AND ADHERING IT TO THE BAG, DRIVING A LINE OF STITCHING THROUGH THE TAPE AND THROUGH THE WALLS OF THE BAG TO SECURE TOGETHER THE WALLS ADJACENT SAID END OF THE BAG, APPLYING A SEPARATE STRIP OF HEAT-SEALABLE PLASTIC MATERIAL OVER THE STITCHING AT LEAST ON ONE SIDE OF THE TAPE, AND APPLYING HEAT AND PRESSURE TO THE STRIP TO HEAT SEAL IT THROUGHOUT ITS LENGTH TO THE TAPE ON OPPOSITE SIDES OF THE STITCHING, AND TO CAUSE PORTIONS OF THE PLASTIC MATERIAL OF THE STRIP TO EXTEND INTO AND PLUG THE NEEDLE HOLES MADE BY THE STITCHING.
Claim 2
Independent Claim
122 words
THE METHOD OF FORMING A CLOSURE FOR AN END OF A PAPER BAG COMPRISING FOLDING A PAPER TAPE AROUND SAID END OF THE BAG AND ADHERING IT TO THE BAG, DRIVING A LINE OF STITCHING THROUGH THE TAPE AND THROUGH THE WALLS OF THE BAG TO SECURE TOGETHER THE WALLS ADJACENT SAID END OF THE BAG, APPLYING A SEPARATE STRIP OF HEAT-SEALABLE PLASTIC MATERIAL OVER THE STITCHING AT LEAST ON ONE SIDE OF THE TAPE, AND APPLYING HEAT AND PRESSURE TO THE STRIP TO HEAT SEAL IT THROUGHOUT ITS LENGTH TO THE TAPE ON OPPOSITE SIDES OF THE STITCHING, AND TO CAUSE PORTIONS OF THE PLASTIC MATERIAL OF THE STRIP TO EXTEND INTO AND PLUG THE NEEDLE HOLES MADE BY THE STITCHING.
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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) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |