Caliper system for signature machines
Abstract
Abstract A CALIPER SYSTEM FOR A CYCLICALLY OPERABLE SIGNATURE GATHERING MACHINE IN WHICH EACH UNBOND BOOK OF SIGNATURES MOVING TOWARD A BINDING STATION PASSES BETWEEN A FIXED SUPPORT AND A MOVABLE ROLLER PROBE THAT IS BIASED TOWARD THE SUPPORT SO THAT THE PROBE POSITION IS A FUNCTION OF BOOK THICKNESS. THE PROBE IS CONNECTED TO THE MOVABLE ELEMENT OF A LINEAR VOLTAGE DIFFERENTIAL TRANSFORMER OR OTHER ELECTRICAL TRANSDUCER, DEVELOPING A BOOK THICKNESS SIGNAL OF GIVEN FREQUENCY AND AMPLITUDE. THE BOOK THICKNESS SIGNAL IS COMPARED WITH A REFERENCE SIGNAL OF CORRESPONDING FREQUENCY HAVING AN AMPLITUDE REPRESENTATIVE OF A CORRECT BOOK THICKNESS TO CONTROL MACHINE OPERATION AND PREVENT BINDING OF INCORRECTLY ASSEMBLED BOOKS.
Inventors
- 👤 William B Mccain
- 👤 James F Cosgrove
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |