Patent US3287015A successfully refreshed from Google Patents.
US3287015A
Expired / Lapsed
US
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Detecting device for the sheet feeder of a printing press
Assignee: Roland Offsetmaschinenfabrik Faber and Schleicher AG
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Filing: 1965-01-21
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Granted: 1966-11-22
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Expires: 1985-01-21
Abstract
No abstract record available.
Inventors
- 👤 Presuss Friedrich
- 👤 Ruckert Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:11
CPC Classifications
B; B65; B65H; B65H7/00; B65H7/02; B65H2553/00; B65H2553/20; B65H2553/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
IN A DETECTING DEVICE FOR DETECTING THE ABSENCE OF SHEETS AND THE PRESENCE OF DOUBLE-UP SHEETS, FED IN THE FORM OF A TRAIN OF OVERLAPPING SHEETS TO A PRINTING PRESS, SAID DETECTING DEVICE COMPRISING TWO DETECTORS DISPOSED SPACED APART IN THE DIRECTION OF THE SHEET TRAVEL, EACH OF SAID DETECTORS BEING ARRANGED TO DETECT THE THICKNESS OF THE SHEET MATERIAL PASSING THE SAME AND TO GENERATE A SIGNAL CORRESPONDING TO THE DETECTED THICKNESS, THE SPACING BETWEEN THE TWO DETECTORS BEING EQUAL TO THE OVERLAP SPACING OF THE SHEETS WITHIN SAID TRAIN OF SHEETS, COMPRISING MEANS COMPARING SAID SIGNALS AND PRODUCING AN ELECTRIC CONTROL SIGNAL IN RESPONSE TO A DIFFERENTIAL ABOVE A PREDETERMINED VALUE BETWEEN SAID COMPARED SIGNALS, AND CONTROL CIRCUIT MEANS ACTIVATED BY SAID ELECTRIC CONTROL SIGNAL.
Claim 2
Dependent Claim
127 words
IN A DETECTING DEVICE FOR DETECTING THE ABSENCE OF SHEETS AND THE PRESENCE OF DOUBLE-UP SHEETS, FED IN THE FORM OF A TRAIN OF OVERLAPPING SHEETS TO A PRINTING PRESS, SAID DETECTING DEVICE COMPRISING TWO DETECTORS DISPOSED SPACED APART IN THE DIRECTION OF THE SHEET TRAVEL, EACH OF SAID DETECTORS BEING ARRANGED TO DETECT THE THICKNESS OF THE SHEET MATERIAL PASSING THE SAME AND TO GENERATE A SIGNAL CORRESPONDING TO THE DETECTED THICKNESS, THE SPACING BETWEEN THE TWO DETECTORS BEING EQUAL TO THE OVERLAP SPACING OF THE SHEETS WITHIN SAID TRAIN OF SHEETS, COMPRISING MEANS COMPARING SAID SIGNALS AND PRODUCING AN ELECTRIC CONTROL SIGNAL IN RESPONSE TO A DIFFERENTIAL ABOVE A PREDETERMINED VALUE BETWEEN SAID COMPARED SIGNALS, AND CONTROL CIRCUIT MEANS ACTIVATED BY SAID ELECTRIC CONTROL SIGNAL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |