Platen cover
Abstract
Abstract A COVER FOR A PLATEN EMPLOYING A PAIR OF CURTAINS WHICH ARE DRAWN IN SUCCESSION FROM ROLLS OVER THE PLATEN. THE FIRST OR LEADING CURTAIN IS OF A SIZE SUFFICIENT TO AT LEAST COVER THE TRANSPARENT PORTION OF THE PLATEN WHEN UNROLLED AND CONSISTS OF A MATERIAL WITH INHERENT SELF-COILING TENDENCIES. THE SECOND OR TRAILING CURTAIN IS LARGER THAN THE FIRST CURTAIN AND COVERS THE ENTIRE PLATEN AREA INCLUDING THE FIRST CURTAIN WHEN UNROLLED. A DRAW CARRIAGE SUPPORTED FOR MOVEMENT ACROSS THE PLATEN AREA IN A PAIR OF LIFTABLE TRACK MEMBERS IS PROVIDED. ONE END OF EACH CURTAIN IS ATTACHED TO THE CARRIAGE SO THAT DRAWING OF THE CARRIAGE ACROSS THE PLATEN AREA UNROLLS BOTH CURTAINS IN SUCCESSION ONTO THE PLATEN AND ANY DOCUMENT RESTING THEREON. WHERE THE DOCUMENT IS RELATIVELY THICK, THE LIFTABLE TRACK MEMBES ENABLE THE CARRIAGE TO BE RAISED FOR PASSAGE OVER THE DOCUMENT.
Inventors
- 👤 Hugh L Jones
Bibliographic Details
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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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |