Duplicator stencil
Abstract
Abstract A duplicator stencil of the type adapted to be perforated through heat action in selected areas comprises a film of a thermoplastic resin carrying on the surface thereof which is to be exposed to heat action, a coating containing a softener for the resin which is a solid and which melts or is decomposed at a lower temperature than the perforation temperature of the film material so as to promote the rapidity and to lower the temperature of perforation of the film material, a substance influencing the surface property of the film material to make it more supple so as to allow complete contact with the original to be stenciled, and to insure easy separation of the original and stencil after heat perforation of the latter, and an inorganic finely divided powder which eliminates residual tackiness of the film material and to impart sharp contours to the perforations, all in amounts effective to facilitate penetration and rapid perforation of the film at places where it is exposed to a source of heat.
Inventors
- 👤 John V Andersen
Bibliographic Details
Claims Analysis
Total Claims: 5References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |