Device for the production of largearea sheets formed of plastics,particularly for the roofs of buildings
Abstract
Abstract APPARATUS FOR CONNECTING INDIVIDUAL SHEETS OF PLASTIC MATERIAL IN OVERLAPPING RELATIONSHIP INCLUDES (A) A PAIR OF SUPPORT SURFACES SPACED APART TO RECEIVE SEPARATE SHEETS OF MATERIAL TO BE JOINED TOGETHER, WITH AT LEAST ONE OF THE SUPPORT SURFACES BEING MOVABLE RELATIVE TO THE OTHER SO THAT THEIR UPPER SURFACES CAN BE BROUGHT INTO AND OUT OF ALIGNMENT WITH ONE ANOTHER, (B) A ROW OF SPRAYING DEVICES FOR APPLYING A WELDING SOLVENT TO EXPOSED EDGE SURFACES OF THE SEPARATE SHEETS OF MATERIAL, AND (C) OPPOSED PRESSING MEMBERS WHICH CAN BE MOVED TOWARD EACH OTHER TO EFFECT AN OVERLAPPING ENGAGEMENT OF THE EXPOSED EDGE SURFACES OF THE SHEETS AFTER THEY HAVE BEEN COATED WITH WELDING SOLVENT.
Inventors
- 👤 Edwin K Ospelt
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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |