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公开(公告)号：JPS62209782A
公开(公告)日：1987-09-14
申请号：JP201187
申请日：1987-01-09
Applicant: IBM
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公开(公告)号：DE3271624D1
公开(公告)日：1986-07-17
申请号：DE3271624
申请日：1982-03-25
Applicant: IBM
Abstract: To feed a document (18) to a registered position on a platen (12) the sheet is first fed by a vacuum transport system (16, 24, 26) over the platen to a point at which its leading edge is beyond a sensor (46). The transport system is then reversed and the sheet is directed back towards the platen to its registration point (e.g. 14) under the control of a servo system (30) which employs a signal from the sensor indicating the sheet leaving the sensor and predetermined input data to select the registration position on the platen.
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公开(公告)号：DE69022148D1
公开(公告)日：1995-10-12
申请号：DE69022148
申请日：1990-06-19
Applicant: IBM
Inventor： GODDARD JOAN STAGAMAN , OVERBY WAYNE ARLAN , VALENT JAMES ALFRED
Abstract: This is an electronic scheme for correcting mechanical misalignment and electrical delays from laser beam to laser beam in the scan direction of a multiple beam laser scanning system for use in an electrophotographic machine. The position at which a reference beam is turned on is sensed and adjusted to a desired position. Thereafter, the positions at which non-reference laser beams are turned on are sensed and adjusted to the desired position. In one embodiment, the energization of laser beams is positioned at the trailing edge of the second element of a photodetector. In a second embodiment, the point of full laser energy is matched, beam to beam, at the junction of the same two elements in a CCD array. Programmable delay lines are used to obtain sub-pel resolution.
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Patent Agency Ranking
公开(公告)号：DE69022148T2
公开(公告)日：1996-05-02
申请号：DE69022148
申请日：1990-06-19
Applicant: IBM
Inventor： GODDARD JOAN STAGAMAN , OVERBY WAYNE ARLAN , VALENT JAMES ALFRED
Abstract: This is an electronic scheme for correcting mechanical misalignment and electrical delays from laser beam to laser beam in the scan direction of a multiple beam laser scanning system for use in an electrophotographic machine. The position at which a reference beam is turned on is sensed and adjusted to a desired position. Thereafter, the positions at which non-reference laser beams are turned on are sensed and adjusted to the desired position. In one embodiment, the energization of laser beams is positioned at the trailing edge of the second element of a photodetector. In a second embodiment, the point of full laser energy is matched, beam to beam, at the junction of the same two elements in a CCD array. Programmable delay lines are used to obtain sub-pel resolution.
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公开(公告)号：DE3774293D1
公开(公告)日：1991-12-12
申请号：DE3774293
申请日：1987-02-03
Applicant: IBM
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公开(公告)号：CA1236568A
公开(公告)日：1988-05-10
申请号：CA529772
申请日：1987-02-16
Applicant: IBM
Inventor： ASHBEE WILLIAM HENRY , KILEN RICHARD SCOTT , KIRTON ALAN JOHN , RITTENHOUSE LARRY EDWARD , VALENT JAMES ALFRED
Abstract: MAGNETIC HEAD POSITIONING APPARATUS AND METHOD An apparatus and method are disclosed for positioning magnetic heads relative to the recording tracks of a recording medium such as a floppy disk having circular, concentric recording tracks formed thereon. The magnetic heads are mounted on a head carriage, and the head carriage is moved, in response to received command pulses, so that the heads are moved linearly, by step increments, along a radius of the floppy disk. The heads are thereby moved across the spaced tracks on the disk, with each incremental movement of the heads being a distance less than the distance between the tracks, and being, for example, onehalf or one-fourth of the total distance between tracks. Acoustic noise due to head movement is minimized by moving the heads by increments less than the distance between the tracks, with such movement avoiding exciting the resonances of the head moving apparatus. The magnetic heads are initially moved at a rate known to avoid exciting the resonance and, during such initial movement, the rate of received command pulses is determined. If the received command pulse rate is within a predetermined range, and is a rate that will not excite resonance, continued movement of the head is at the rate of the received command pulses.
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公开(公告)号：DE3267035D1
公开(公告)日：1985-11-28
申请号：DE3267035
申请日：1982-07-30
Applicant: IBM
Inventor： ASHBEE WILLIAM HENRY , BERAN MARK ALEXANDER , COLGLAZIER DONALD FRANCIS , JANSSEN DONOVAN MILO , MANTEY JOHN PAUL , MARTIN RONALD JAMES , PATCH GERALD PAUL , RITTENHOUSE LARRY EDWARD , VALENT JAMES ALFRED
Abstract: A copier document feed system includes a document stack tray (208) positioned over an exposure platen feed system (210). A document from the stack is fed to the platen feed system by a first turnaround system (214, 212). After exposure the document is fed to a deflector (218) to either the top (duplex path) or to the bottom (simplex path) of a second turnaround system (224, 222) or to a further tray (SADF path). When the document is fed to the bottom of the second turnaround system, this system drives it round back to the document stack tray. When the document is fed to the top of the second turnaround system, the feed direction of this sytem is reversed to feed the document, inverted, back to the exposure platen. The exposure platen feed system, and first and second turnaround systems are each driven by a separate servo system (254 260, and 248).
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公开(公告)号：DE3263474D1
公开(公告)日：1985-06-20
申请号：DE3263474
申请日：1982-02-10
Applicant: IBM
Inventor： JANSSEN DONOVAN MILO , MAGNO ROBERT , SEAWARD WILLIAM STEPHEN , VALENT JAMES ALFRED
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