Apparatus for adjusting the lateral position of a continuous moving web
Abstract
Abstract APPARATUS IS PROVIDED FOR CONTROLLING THE LATERAL POSITION OF A CONTINUOUS WEB MOVING THROUGH A MACHINE SUCH AS A PRINTING PRESS. FIRST AND SECOND SPACED ROLLS ARE MOUNTED ON A CARRIAGE FOR ROTATION ABOUT PARALLEL AXES, WITH THE WEB LEAVING THE SECOND ROLL PARALLEL TO THE WEB ARRIVING AT THE FIRST ROLL. FLEXIBLE STRAPS SUPPORT THE CARRIAGE EACH STRAP BEING FLEXIBLE SUBSTANTIALLY ONLY NORMALLY OF THE PLANE INCLUDING THE RESPECTIVE STRAP AND THE LINE IN THE PLANE OF THE APPROACHING WEB TANGENT TO THE MID-POINT OF THE FIRST ROLL, THEREBY CONSTRAINING THE CARRIAGE TO ROTATION ABOUT THAT LINE AS A FIXED AXIS. EDGE DETECTORS SENSE THE LATERAL POSITION OF THE WEB AND PRODUCE A CONTROL SIGNAL USED TO DRIVE THE CARRIAGE ABOUT ITS AXIS TO CONTROL THE LATERAL POSITION OF THE WEB. THE EDGE DETECTORS MAY BE MOUNTED ADJACENT THE SECOND ROLL FOR ROTATION WITH THE CARRIAGE ABOUT A FIXED AXIS SUBSTANTIALLY COINCIDENT WITH THE MID-LINE OF THE LEAVING WEB TANGENT TO THE SECOND ROLL.
Inventors
- 👤 John R Martin
Bibliographic Details
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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) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |