Patent US2131459A successfully refreshed from Google Patents.
Patent US2971874A successfully refreshed from Google Patents.
US2971874A
Expired / Lapsed
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Method of making plastic bags
Assignee: Equitable Paper Bag Co Inc
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Filing: 1960-03-14
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Granted: 1961-02-14
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Expires: 1980-03-14
Abstract
No abstract record available.
Inventors
- 👤 Leonard E Canno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:24
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/74; B31B70/81; B31B70/812; B31B70/8123; B31B2160/00; B31B2160/10; B31B2160/106; Y; Y10; Y10S; Y10S206/00; Y10S206/806; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1008; Y10T156/1011; Y10T156/1052; Y10T156/1056; Y10T156/1084; Y10T156/12; Y10T156/1304; Y10T156/1309; Y10T156/1317; Y10T156/1322
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
THE METHOD OF MAKING PLASTIC BAGS, EACH OF WHICH HAS A TOP COMPARTMENT SEALED OFF FROM THE REMAINDER OF THE BAG AND WITH A REINFORCING STRIP ENCLOSED IN THE SEALED-OFF COMPARTMENT, WHICH METHOD COMPRISES ADVANCING A WEB OF PLASTIC FILM FROM A SUPPLY SOURCE AND SIMULTANEOUSLY ADVANCING A CONTINUOUS LENGTH OF THE REINFORCING STRIP WITH THE FILM WEB, FOLDING THE WEB OF PLASTIC FILM WITH THE STRIP WITHIN THE FOLD, SEALING CONFRONTING FACES OF THE WEB TO ONE ANOTHER IMMEDIATELY BELOW THE STRIP TO FORM, WITHIN THE FOLD, A COMPARTMENT ENCLOSING THE STRIP AND EXTENDING LENGTHWISE OF THE STRIP, ALSO SEALING THE CONFRONTING FACES OF THE WEB TOGETHER AT REGIONS SPACED FROM ONE ANOTHER LENGTHWISE OF THE LENGTH OF THE WEB AND STRIP AND WITH SAID REGIONS EXTENDING TRANSVERSELY OF THE FOLDED WEB, AND SEVERING THE WEB AT SAID REGIONS ACROSS THE FULL WIDTH OF THE WEB AND THROUGH THE STRIP TO FORM SEPARATE BAGS.
Claim 2
Independent Claim
155 words
THE METHOD OF MAKING PLASTIC BAGS, EACH OF WHICH HAS A TOP COMPARTMENT SEALED OFF FROM THE REMAINDER OF THE BAG AND WITH A REINFORCING STRIP ENCLOSED IN THE SEALED-OFF COMPARTMENT, WHICH METHOD COMPRISES ADVANCING A WEB OF PLASTIC FILM FROM A SUPPLY SOURCE AND SIMULTANEOUSLY ADVANCING A CONTINUOUS LENGTH OF THE REINFORCING STRIP WITH THE FILM WEB, FOLDING THE WEB OF PLASTIC FILM WITH THE STRIP WITHIN THE FOLD, SEALING CONFRONTING FACES OF THE WEB TO ONE ANOTHER IMMEDIATELY BELOW THE STRIP TO FORM, WITHIN THE FOLD, A COMPARTMENT ENCLOSING THE STRIP AND EXTENDING LENGTHWISE OF THE STRIP, ALSO SEALING THE CONFRONTING FACES OF THE WEB TOGETHER AT REGIONS SPACED FROM ONE ANOTHER LENGTHWISE OF THE LENGTH OF THE WEB AND STRIP AND WITH SAID REGIONS EXTENDING TRANSVERSELY OF THE FOLDED WEB, AND SEVERING THE WEB AT SAID REGIONS ACROSS THE FULL WIDTH OF THE WEB AND THROUGH THE STRIP TO FORM SEPARATE BAGS.
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) | 1964-02-14 | 1964-08-15 | 1965-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-14 | 1968-08-15 | 1969-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-14 | 1972-08-15 | 1973-02-14 | $7700.00 | Window Closed / Lapsed |