US3277798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a square bottom container
Assignee: Korsnas GmbH
•
Filing: 1964-09-21
•
Granted: 1966-10-11
•
Expires: 1984-09-21
Abstract
No abstract record available.
Inventors
- 👤 Krauss Richard Adolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:02
CPC Classifications
B; B65; B65D; B65D31/00; B65D31/08; B31; B31B; B31B2150/00; B31B2150/001; B31B2160/00; B31B2160/20; Y; Y10; Y10S; Y10S493/00; Y10S493/916; Y10S493/936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
214 words
A METHOD OF PRODUCING SQUARE BOTTOM CONTAINERS, SUCH AS SACKS, BAGS OR BOXES, COMPRISING FORMING A FLEXIBLE SHEET MATERIAL INTO A FLAT TUBE HAVING TWO OPPOSITE SIDE WALLS CONNECTED BY INTERMEDIATE LONGITUDINAL BELLOWSFOLDS, FORMING ON ONE SIDE WALL A FLAP EXTENDING A SHORT DISTANCE IN THE LONGITUDINAL DIRECTION OF THE TUBE BETWEEN THE END PORTIONS OF THE BELLOWS-FOLDS AND HAVING A WIDTH SUBSTANTIALLY CORRESPONDING TO THE SPACE BETWEEN THE BOTTOMS OF SAID FOLDS IN THE FLATTENED STATE OF THE TUBE, FORMING THE END PORTION OF THE OTHER SIDE WALL OPPOSITE TO THE FLAP CORRESPONDINGLY SHORTER, FOLDING SAID FLAP OVER AND SECURING IT TO SAID END OF THE OTHER SIDE WALL SO AS TO CLOSE THE CENTRAL PART OF THE TUBE END, OPENING THE BELLOWSFOLDS INTO PLANES SUBSTANTIALLY PERPENDICULAR TO THE PLANE OF THE CENTRAL PORTIONS OF THE SIDE WALLS, FOLDING THE FOUR CORNERS ONTO ADJACENT SIDE WALLS ALONG LINES EXTENDING AT AN ANGLE OF ABOUT 45* FROM THE ENDS OF THE CLOSURE FLAP FOLDING LINE ONTO THE LONGITUDINAL EDGES OF THE SIDE WALLS SO AS TO CAUSE THE PROJECTING PORTIONS OF THE CORNERS TO OVERLAP THE CENTRAL CLOSURE FLAP AT LEAST PARTLY, AND SECURING SAID FOLDED CORNERS TO THE SURFACES OF THE FLAP AND OF THE SIDE WALLS, WHEREBY A CLOSED BOTTOM IS OBTAINED.
Claim 2
Independent Claim
214 words
A METHOD OF PRODUCING SQUARE BOTTOM CONTAINERS, SUCH AS SACKS, BAGS OR BOXES, COMPRISING FORMING A FLEXIBLE SHEET MATERIAL INTO A FLAT TUBE HAVING TWO OPPOSITE SIDE WALLS CONNECTED BY INTERMEDIATE LONGITUDINAL BELLOWSFOLDS, FORMING ON ONE SIDE WALL A FLAP EXTENDING A SHORT DISTANCE IN THE LONGITUDINAL DIRECTION OF THE TUBE BETWEEN THE END PORTIONS OF THE BELLOWS-FOLDS AND HAVING A WIDTH SUBSTANTIALLY CORRESPONDING TO THE SPACE BETWEEN THE BOTTOMS OF SAID FOLDS IN THE FLATTENED STATE OF THE TUBE, FORMING THE END PORTION OF THE OTHER SIDE WALL OPPOSITE TO THE FLAP CORRESPONDINGLY SHORTER, FOLDING SAID FLAP OVER AND SECURING IT TO SAID END OF THE OTHER SIDE WALL SO AS TO CLOSE THE CENTRAL PART OF THE TUBE END, OPENING THE BELLOWSFOLDS INTO PLANES SUBSTANTIALLY PERPENDICULAR TO THE PLANE OF THE CENTRAL PORTIONS OF THE SIDE WALLS, FOLDING THE FOUR CORNERS ONTO ADJACENT SIDE WALLS ALONG LINES EXTENDING AT AN ANGLE OF ABOUT 45* FROM THE ENDS OF THE CLOSURE FLAP FOLDING LINE ONTO THE LONGITUDINAL EDGES OF THE SIDE WALLS SO AS TO CAUSE THE PROJECTING PORTIONS OF THE CORNERS TO OVERLAP THE CENTRAL CLOSURE FLAP AT LEAST PARTLY, AND SECURING SAID FOLDED CORNERS TO THE SURFACES OF THE FLAP AND OF THE SIDE WALLS, WHEREBY A CLOSED BOTTOM IS OBTAINED.
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) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |