US3143936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of bags
Assignee: Bemis Brothers Bag Co
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Filing: 1962-09-10
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Granted: 1964-08-11
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Expires: 1982-09-10
Abstract
No abstract record available.
Inventors
- 👤 Arnold F Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:01
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/74; B31B70/81; B31B70/84; B31B70/85; B31B2160/00; B31B2160/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
THE METHOD OF FORMING CUFFED VALVE SLEEVES FOR APPLICATION TO BAGS FED THROUGH A BOTTOMER, COMPRISING FEEDING A CONTINUOUS WEB OF VALVE SLEEVE MATERIAL IN A PREDETERMINED PATH, FORMING CUFF-DEFINING CUTS IN THE WEB AT SLEEVE LENGTH INTERVALS IN THE WEB, EACH CUFF-DEFINING CUT INCLUDING A BASE CUT EXTENDING TRANSVERSELY OF THE WEB AND SIDE CUTS EXTENDING IN TRAILING DIRECTION FROM THE ENDS OF THE BASE CUT, FOLDING BACK THE CUFFS DEFINED BY THE CUTS, FOLDING OVER SIDE PORTIONS OF THE WEB ON LINES LOCATED INWARD OF THE SIDE CUTS TO BRING THE SIDE MARGINS OF THE WEB INTO OVERLAPPING RELATION AND ADHERING SAID SIDE MARGINS TOGETHER THEREBY TO FORM A CONTINUOUS STRING OF INTEGRALLY CONNECTED FLAT TUBULAR VALVE SLEEVES EACH HAVING A FOLDEDBACK CUFF AT ONE END, AND SEGMENTING EACH INDIVIDUAL VALVE SLEEVE FROM THE STRING FOR APPLICATION TO A BAG BY FORMING A LINE OF WEAKNESS ACROSS THE STRING AT THE TRAILING END OF THE LEADING SLEEVE OF THE STRING AND SNAPPING OFF THE LEADING SLEEVE AT SAID LINE OF WEAKNESS BY ACCELERATING IT RELATIVE TO THE SPEED OF WEB FEED.
Claim 2
Independent Claim
183 words
THE METHOD OF FORMING CUFFED VALVE SLEEVES FOR APPLICATION TO BAGS FED THROUGH A BOTTOMER, COMPRISING FEEDING A CONTINUOUS WEB OF VALVE SLEEVE MATERIAL IN A PREDETERMINED PATH, FORMING CUFF-DEFINING CUTS IN THE WEB AT SLEEVE LENGTH INTERVALS IN THE WEB, EACH CUFF-DEFINING CUT INCLUDING A BASE CUT EXTENDING TRANSVERSELY OF THE WEB AND SIDE CUTS EXTENDING IN TRAILING DIRECTION FROM THE ENDS OF THE BASE CUT, FOLDING BACK THE CUFFS DEFINED BY THE CUTS, FOLDING OVER SIDE PORTIONS OF THE WEB ON LINES LOCATED INWARD OF THE SIDE CUTS TO BRING THE SIDE MARGINS OF THE WEB INTO OVERLAPPING RELATION AND ADHERING SAID SIDE MARGINS TOGETHER THEREBY TO FORM A CONTINUOUS STRING OF INTEGRALLY CONNECTED FLAT TUBULAR VALVE SLEEVES EACH HAVING A FOLDEDBACK CUFF AT ONE END, AND SEGMENTING EACH INDIVIDUAL VALVE SLEEVE FROM THE STRING FOR APPLICATION TO A BAG BY FORMING A LINE OF WEAKNESS ACROSS THE STRING AT THE TRAILING END OF THE LEADING SLEEVE OF THE STRING AND SNAPPING OFF THE LEADING SLEEVE AT SAID LINE OF WEAKNESS BY ACCELERATING IT RELATIVE TO THE SPEED OF WEB FEED.
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) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |