US3578735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for molding plastic articles
Assignee: Monsanto Co
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Filing: 1968-12-30
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Granted: 1971-05-11
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Expires: 1988-12-30
Abstract
Abstract METHOD AND APPARATUS FOR SIMULTANEOUSLY FORMING A PLURALITY OF ARTICLES FROM THERMOPLASTIC SHEET MATERIAL. THE SHEET FROM WHICH THE ARTICLES ARE FORMED IS CLAMPED AGAINST A MOLD CONTAINING ROWS OF MOLD CAVITIES. THE CLAMPING IS WITHIN THE PERIPHERY OF THE SHEET SOLELY IN A DIRECTION PERPENDICULAR TO THAT OF ADVANCEMENT OF THE SHEET SUCH THAT IT IS UNINTERRUPTED ACROSS THE SHEET INTERMEDIATE EACH ROW OF CAVITIES. THE CLAMPING MEMBER HAS A RECIPROCATABLY MOUNTED FRAME HAVING LATERALLY EXTENDING RIBS JOINED TO SIDES OF THE FRAME. THE RIBS ARE ALIGNED OPPOSITE A FRONT FACE OF THE MOLD BETWEEN THE ROWS OF CAVITIES THEREIN.
Inventors
- 👤 Sidney Cholmar
- 👤 Robert H Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:43
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/26
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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |