Patent US20040100510A1 successfully refreshed from Google Patents.
Patent US5516094A successfully refreshed from Google Patents.
US5516094A
Expired / Lapsed
US
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Linear array sensor for copy sheet registration
Assignee: Xerox Corp
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Filing: 1994-06-24
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Granted: 1996-05-14
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Expires: 2014-06-24
Abstract
Abstract An electrophotographic printing machine of the type in which a leading edge and a trailing edge of a moving sheet are detected. The improvement includes an elongated light source that is of a length greater than that of an irregularity on the moving sheet. The elongated light source extends in a direction substantially parallel to the direction of the moving sheet. A plurality of sensors are arranged in an array and are movably mounted on a support which is extended in a direction substantially parallel to the elongated light source. The elongated light source is movably mounted to another support, so as to position the light source relative to the array of sensors. A lens, interposed between the light source and the sensor array focuses light rays emitted from the light source on to the sensors. The sensors are in a receiving relationship with the light source. The elongated light source and the array of sensors define a passageway through which the moving sheet passes.
Inventors
- 👤 Charles F. Sander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:17
CPC Classifications
B; B65; B65H; B65H7/00; B65H7/02; B65H7/14; B65H2511/00; B65H2511/50; B65H2511/51; B65H2511/514; B65H2515/00; B65H2515/60; B65H2553/00; B65H2553/40; B65H2553/41; B65H2553/416; B65H2553/80; B65H2553/81; B65H2701/00; B65H2701/10; B65H2701/13; B65H2701/131; B65H2701/1311; B65H2701/1313
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
135 words
An apparatus for detecting a leading edge or a trailing edge of a moving sheet, including: an elongated light source extending in a direction substantially parallel to the direction of the moving sheet; a plurality of sensors arranged in an array extending in a direction substantially parallel to said elongated light source in a receiving relationship therewith, said elongated light source and said plurality of sensors defining a passageway through which the moving sheet passes; a controller, said plurality of sensors transmitting a signal to said controller, said controller, responsive to the signal from said plurality of sensors, indicating the leading edge or trailing edge of the moving sheet; and means associated with said plurality of sensors, for generating a calibration reference signal and transmitting the reference signal to said controller to callibrate said controller.
Claim 2
Independent Claim
135 words
An apparatus for detecting a leading edge or a trailing edge of a moving sheet, including: an elongated light source extending in a direction substantially parallel to the direction of the moving sheet; a plurality of sensors arranged in an array extending in a direction substantially parallel to said elongated light source in a receiving relationship therewith, said elongated light source and said plurality of sensors defining a passageway through which the moving sheet passes; a controller, said plurality of sensors transmitting a signal to said controller, said controller, responsive to the signal from said plurality of sensors, indicating the leading edge or trailing edge of the moving sheet; and means associated with said plurality of sensors, for generating a calibration reference signal and transmitting the reference signal to said controller to callibrate said controller.
Claim 3
Dependent Claim
23 words
An apparatus according to claim 1, wherein said light source is a length greater than that of an irregularity in the moving sheet.
Claim 4
Dependent Claim
36 words
An apparatus according to claim 1, further including a lens, interposed between said elongated light source and said plurality of sensors to focus lights rays emitted from said elongated light source on said plurality of sensors.
Claim 5
Independent Claim
101 words
An apparatus for detecting a leading edge or a trailing edge of a moving sheet, including: an elongated light source extending in a direction substantially parallel to the direction of the moving sheet; a plurality of sensors arranged in an array extending in a direction substantially parallel to said elongated light source in a light receiving relationship therewith, said elongated light source and said plurality of sensors defining a passageway through which the moving sheet passes; and a support having said elongated light source mounted movably thereon so as to position said light source relative to said plurality of light sensors.
Claim 6
Independent Claim
101 words
An apparatus for detecting a leading edge or a trailing edge of a moving sheet, including: an elongated light source extending in a direction substantially parallel to the direction of the moving sheet; a plurality of sensors arranged in an array extending in a direction substantially parallel to said elongated light source in a light receiving relationship therewith, said elongated light source and said plurality of sensors defining a passageway through which the moving sheet passes; and a support having said elongated light source mounted movably thereon so as to position said light source relative to said plurality of light sensors.
Claim 7
Dependent Claim
20 words
An apparatus according to claim 4, further including a second support having said plurality of light sensors mounted movably thereon.
Claim 8
Dependent Claim
46 words
An apparatus according to claim 5, wherein: said elongated light source is movable on said support in a direction substantially transverse to the moving sheet; and said plurality of light sensors is movable on said second support in a direction substantially parallel to the moving sheet.
Claim 9
Dependent Claim
144 words
A printing machine of the type in which a leading edge or a trailing edge of a moving sheet are detected, wherein the improvement includes: an elongated light source extending in a direction substantially parallel to the direction of the moving sheet; a plurality of sensors arranged in an array extending in a direction substantially parallel to said elongated light source in a receiving relationship therewith, said elongated light source and said plurality of sensors defining a passageway through which the moving sheet passes; a controller, said plurality of sensors transmitting a signal to said controller, said controller, responsive to the signal from said plurality of sensors, indicating the leading edge or trailing edge of the moving sheet; and means associated with said plurality of sensors, for generating a calibration reference signal and transmitting the reference signal to said controller to calibrate said controller.
Claim 10
Dependent Claim
144 words
A printing machine of the type in which a leading edge or a trailing edge of a moving sheet are detected, wherein the improvement includes: an elongated light source extending in a direction substantially parallel to the direction of the moving sheet; a plurality of sensors arranged in an array extending in a direction substantially parallel to said elongated light source in a receiving relationship therewith, said elongated light source and said plurality of sensors defining a passageway through which the moving sheet passes; a controller, said plurality of sensors transmitting a signal to said controller, said controller, responsive to the signal from said plurality of sensors, indicating the leading edge or trailing edge of the moving sheet; and means associated with said plurality of sensors, for generating a calibration reference signal and transmitting the reference signal to said controller to calibrate said controller.
Claim 11
Dependent Claim
24 words
A printing machine according to claim 7, wherein said light source is a length greater than that of an irregularity in the moving sheet.
Claim 12
Dependent Claim
37 words
A printing machine according to claim 7, further including a lens, interposed between said elongated light source and said plurality of sensors to focus lights rays emitted from said elongated light source on said plurality of sensors.
Claim 13
Dependent Claim
106 words
A printing machine of type in which a leading edge ortrailing edge of a moving sheet are detected, wherein the improvement includes: an elongated light source extending in a direction substantially parallel to the direction of the moving sheet; a plurality of sensors arranged in an array extending in a direction substantially parallel to said elongated light source in light receiving relationship therewith, said elongated light source and said plurality of sensors defining a passageway through which the moving sheet passes; and a support having said elongated light source mounted movably thereon so as to position said light source relative to said plurality of light sensors.
Claim 14
Dependent Claim
106 words
A printing machine of type in which a leading edge ortrailing edge of a moving sheet are detected, wherein the improvement includes: an elongated light source extending in a direction substantially parallel to the direction of the moving sheet; a plurality of sensors arranged in an array extending in a direction substantially parallel to said elongated light source in light receiving relationship therewith, said elongated light source and said plurality of sensors defining a passageway through which the moving sheet passes; and a support having said elongated light source mounted movably thereon so as to position said light source relative to said plurality of light sensors.
Claim 15
Dependent Claim
21 words
A printing machine according to claim 10, further including a second support having said plurality of light sensors mounted movably thereon.
Claim 16
Dependent Claim
47 words
A printing machine according to claim 11, wherein: said elongated light source is movable on said support in a direction substantially transverse to the moving sheet; and said plurality of light sensors is movable on said second support in a direction substantially parallel to the moving sheet.
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) | 1999-05-14 | 1999-11-13 | 2000-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-05-14 | 2003-11-13 | 2004-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-05-14 | 2007-11-13 | 2008-05-14 | $7700.00 | Window Closed / Lapsed |