Automatic thickness gauging apparatus
Abstract
Abstract APPARATUS FOR GUAGING THE THICKNESS OF A PLURALITY OF SHEETS OR STRIPS OF MATERIAL OF VARYING CROSS-SECTIONS COMPRISING SPRINGLOADED ARTICULATED POWERED ROLLERS CONTINUOUSLY ADVANCING THE SHEETS OR STRIPS ALONG A PATH, A PLURALITY OF SPACED THICKNESS GAUGES HAVING A RETRACTABLE FOLLOWER, URGED INTO CONTACT WITH THE SURFACE OF THE MOVING SHEETS OR STRIPS, RETRACTORS ADAPTED TO WITHDRAW THE FOLLOWERS FROM THE PATH OF THE MOVING SHEETS OR STRIPS, LIMIT SWITCHES ACTUATED BY THE PASSAGE OF THE TRAILING EDGE OF EACH SHEET OR STRIP TO ACTIVATE SAID RETRACTORS, AND BY THE PASSAGE OF THE LEADING EDGE OF THE FOLLOWING SHEET OF STRIP TO DEACTIVATE SAID RETRACTORS, AND BRAKING MEANS CONTROLLING THE RATE OF MOVEMENT OF THE FOLLOWERS.
Inventors
- 👤 Norman I London
- 👤 Alan R Davis
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |