US3280705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing plastic bags
Assignee: Windmoeller and Hoelscher KG
•
Filing: 1965-03-22
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Granted: 1966-10-25
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Expires: 1985-03-22
Abstract
No abstract record available.
Inventors
- 👤 Gennerich Max
- 👤 Rochla Kurt
- 👤 Trautmann Karl-Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:30
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/74; B31B70/81; B31B70/84; B31B70/85; B31B2150/00; B31B2160/00; B31B2160/10; B31B2160/20; B31B70/844
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
A METHOD FOR MANUFACTURING PLASTIC BAGS OF THE CHARACTER DESCRIBED FROM OPEN-ENDED TUBE SECTIONS HAVING A PAIR OF OPPOSITE GUSSETED SIDE WALLS AND A PAIR OF OPPOSITE FLAT WALLS, COMPRISING THE STEPS OF FOLDING BACK A FRONT CORNER OF THE UPPER WALL OF SAID PAIR OF FLAT WALLS, THEREBY FORMING A CORNER FLAP AND A GUSSET TRIANGLE IN ONE SIDE WALL OF SAID PAIR OF GUSSETED SIDE WALLS, JOINING A VALVE STRIP TO SAID CORNER FLAP BY MEANS OF A WELDED SEAM, REFOLDING SAID CORNER PORTION OF THE UPPER WALL TO ITS ORIGINAL POSITION AND SIMULTANEOUSLY THEREWITH FOLDING SAID VALVE STRIP, SAID CORNER FLAP AND SAID GUSSET TRIANGLE ALONG THEIR RESPECTIVE CENTER LINES, WELDING THE TWO UPRIGHT WALLS OF THE FOLDED VALVE STRIP TO OPPOSITE SIDES OF SAID PAIR OF FLAT WALLS ALONG STRAIGHT LINES BEING PARALLEL TO THE UPPER EDGES OF SAID FOLDED VALVE STRIP, AND SEALING SAID OPEN ENDS OF SAID TUBE SECTION BY MEANS OF A WELDED SEAM EACH.
Claim 2
Independent Claim
162 words
A METHOD FOR MANUFACTURING PLASTIC BAGS OF THE CHARACTER DESCRIBED FROM OPEN-ENDED TUBE SECTIONS HAVING A PAIR OF OPPOSITE GUSSETED SIDE WALLS AND A PAIR OF OPPOSITE FLAT WALLS, COMPRISING THE STEPS OF FOLDING BACK A FRONT CORNER OF THE UPPER WALL OF SAID PAIR OF FLAT WALLS, THEREBY FORMING A CORNER FLAP AND A GUSSET TRIANGLE IN ONE SIDE WALL OF SAID PAIR OF GUSSETED SIDE WALLS, JOINING A VALVE STRIP TO SAID CORNER FLAP BY MEANS OF A WELDED SEAM, REFOLDING SAID CORNER PORTION OF THE UPPER WALL TO ITS ORIGINAL POSITION AND SIMULTANEOUSLY THEREWITH FOLDING SAID VALVE STRIP, SAID CORNER FLAP AND SAID GUSSET TRIANGLE ALONG THEIR RESPECTIVE CENTER LINES, WELDING THE TWO UPRIGHT WALLS OF THE FOLDED VALVE STRIP TO OPPOSITE SIDES OF SAID PAIR OF FLAT WALLS ALONG STRAIGHT LINES BEING PARALLEL TO THE UPPER EDGES OF SAID FOLDED VALVE STRIP, AND SEALING SAID OPEN ENDS OF SAID TUBE SECTION BY MEANS OF A WELDED SEAM EACH.
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) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |