Patent EP0227594A1 successfully refreshed from Google Patents.
US2952875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the drawing of plastics
Assignee: Coleman Co Inc
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Filing: 1957-07-11
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Granted: 1960-09-20
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Expires: 1977-07-11
Abstract
No abstract record available.
Inventors
- 👤 Wallace D Herrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:46
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/04; B29C51/08; Y; Y10; Y10S; Y10S264/00; Y10S264/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN A DEVICE FOR DEEP DRAWING OF PLASTIC SHEETS BY THE REVERSE METHOD, A TANK PROVIDING MEANS ABOUT AN OPENING IN A WALL THEREOF FOR PERIMETRICALLY CLAMPING A PLASTIC SHEET THEREOVER, MEANS FR INTERNALLY PRESSURIZING SAID TANK TO OUTWARDLY BULGE SAID SHEET, SAID PUNCH HAVING A GENERALLY RECTANGULAR PROFILE MOUNTED FOR MOVEMENT FROM A POSITION SPEACED FROM SAID WALL TO A POSITION WITHIN SAID TANK, MEANS IN THE FACE OF SAID PUNCH ADJACENT SAILD TANK FOR LIMITING THE BULGING OF SAID SHEET, SAID CLAMPING MEANS BEING SPACED OUTWARDLY FROM THE PERIPHERY OF SAID OPENING, AND BLEED HOLE MEANS IN SAID WALL BETWEEN SAID PERIPHERY AND SAID CLAMPING MEANS.
Claim 2
Dependent Claim
108 words
IN A DEVICE FOR DEEP DRAWING OF PLASTIC SHEETS BY THE REVERSE METHOD, A TANK PROVIDING MEANS ABOUT AN OPENING IN A WALL THEREOF FOR PERIMETRICALLY CLAMPING A PLASTIC SHEET THEREOVER, MEANS FR INTERNALLY PRESSURIZING SAID TANK TO OUTWARDLY BULGE SAID SHEET, SAID PUNCH HAVING A GENERALLY RECTANGULAR PROFILE MOUNTED FOR MOVEMENT FROM A POSITION SPEACED FROM SAID WALL TO A POSITION WITHIN SAID TANK, MEANS IN THE FACE OF SAID PUNCH ADJACENT SAILD TANK FOR LIMITING THE BULGING OF SAID SHEET, SAID CLAMPING MEANS BEING SPACED OUTWARDLY FROM THE PERIPHERY OF SAID OPENING, AND BLEED HOLE MEANS IN SAID WALL BETWEEN SAID PERIPHERY AND SAID CLAMPING MEANS.
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) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |