US3746593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of boxes from corrugated board and like materials
Assignee: Amcor Pty Ltd
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Filing: 1968-09-10
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Granted: 1973-07-17
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Expires: 1988-09-10
Abstract
Abstract A method of forming foldable creases in corrugated board by forming a single crease in the "outer" liner (with respect to the fold) and a creased zone in the inner liner and interior corrugated member so as to form a hinge which is asymmetrical in cross section whereby during folding the board sufficient inward deformation of the inner liner and corrugated member occurs to prevent outward bulging of the inner liner and permit effective bending of the outer liner while minimizing any tendency to crack, the liners remaining flat and parallel up to a zone adjacent the crease and creased zone, even if the folding operation occurs through 180 degrees.
Inventors
- 👤 Z Majewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:16
CPC Classifications
B; B31; B31B; B31B50/00; B31B50/25; B31B50/252; Y; Y10; Y10S; Y10S229/00; Y10S229/93; Y10S229/939; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1016; Y10T156/102
Claims Analysis
Total Claims: 0
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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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |