Moval ultrasonic perforating a sheet of film paper or the like with chip re
Abstract
Abstract A hole is punched through a sheet of photographic film or paper by positioning the sheet with one side in contact with a hollow punch, and applying ultrasonic energy to the opposite side to force the punch through the sheet. A long web of such material can be passed continuously past an ultrasonic horn while a series of punches are successively brought into register with the horn to pierce a series of spaced holes. Such a series of punches can be carried by a rotating cylindrical anvil over which the web is passing. cores or chips from the holes are removed by causing them to adhere to a secondary sheet or web which is in contact with the sheet or web being perforated, adherence being assured by the ultrasonic vibration which soften thermoplastic material of either the chips or the secondary sheet.
Inventors
- 👤 T Graczyk
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |