US3671350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a plastic shopping bag
Assignee: Westlake Plastics Co
•
Filing: 1969-12-24
•
Granted: 1972-06-20
•
Expires: 1989-12-24
Abstract
Abstract METHOD FOR MAKING AN OVER-THE-ARM PLASTIC BAG OF POLYETHYLENE AND SIMILAR THERMOPLASTIC RESINS WHICH COMPRISES FEEDING TUBULAR SIDE-GUSSETED PLASTIC STOCK THROUGH A PERFORATOR OR CUTTER STATION AND THEN THROUGH A HEAT SEALING STATION WHERE A GENERALLY RECTANGULAR PERFORATED OR CUT AREA IS PRODUCED EVERY TWO BAG LENGTHS IN THE FRONT AND BACK PANELS AND GUSSETS OF THE STOCK AND THE HEAT SEALING AND SEVERING IS EFFECTED SIMULTANEOUSLY TRANSVERSELY OF THE STOCK CENTRALLY BETWEEN THE PERFORATED OR CUT AREAS TO FORM THE BOTTOMS OF THE BAGS AND TRANSVERSELY ACROSS AND BISECTING THE PERFORATED OR CUT AREA TO PRODUCE THE TOPS OF THE BAGS WITHOUT OPENING THE WELDS THEMSELVES.
Inventors
- 👤 Edward B Westlake Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:43
CPC Classifications
B; B65; B65D; B65D33/00; B65D33/06; B65D33/065; B31; B31B; B31B70/00; B31B2155/00; B31B2155/003; B31B2160/00; B31B2160/10; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/12; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T156/1737
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |