Apparatus for forming plastic material
Abstract
Abstract METHOD AND APPARATUS FOR FORMING PLASTIC MATERIAL INCLUDING THE PROVISION OF AN ELEVATED HEATING OVEN, A CONTOURED FORMING MOLD, AN OPEN FRAME MEMBER CONSTRUCTED FOR SUPPORTING A SHEET OF PLASTIC MATERIAL AND NORMALLY DISPOSED AT A POSITION PERIPHERALLY SURROUNDING THE LOWER PORTION OF THE FORMING MOLD, AND A MOUNTING AND DRIVE ARRANGEMENT FOR THE FRAME MEMBER THAT PERMITS IT TO BE AUTOMATICALLY RAISED FROM ITS NORMAL POSITION TO A SELECTED ITERMEDIATE POSITION FOR LOADING THE PLASTIC SHEET THEREIN, THEN RAISED FURTHER TO A PREDETERMINED UPPER POSITION AT WHICH THE SHEET MAY BE HEATED BY THE ELEVATED HEATING OVEN, AND THEN LOWERING THE FRAME IMMEDIATELY FOLLOWING HEATING AND WHILE STILL UNDER THE OVEN TO ITS NORMAL POSITION AT WHICH THE SHEET OF PLASTIC MATERIAL IS CAUSED TO CONFORM TO THE CONTOURS OF THE MOLD.
Inventors
- 👤 Jack N Shuman
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |