Dynamic information storage or retrieval – Systems having plural physically distinct independent tracks... – Continuous consecutive storage or retrieval of interrupted...
Patent
1991-01-03
1993-05-04
Young, Wayne R.
Dynamic information storage or retrieval
Systems having plural physically distinct independent tracks...
Continuous consecutive storage or retrieval of interrupted...
369125, 250548, G11B 700, G01N 2186
Patent
active
052087964
ABSTRACT:
A method and apparatus for transverse registration of image exposures on photoreceptive belts subject to lateral deviation from linear travel in which targets, corresponding in location to the image areas to be exposed, are used for the detection of lateral belt displacement and to control the transverse location of exposure scan. The targets are of a pattern defining a reference line and a line inclined with respect to the direction of belt travel so that the duration of time between passage of the target lines with respect to a spacially fixed sensing axis will vary with lateral displacement of the belt. The targets may assume a variety of specific patterns and the invention is applicable to single and multi-pass image exposure systems as well as to both modulated laser and light emitting diode types of exposure devices.
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Arnone Stephen C.
Costanza Daniel W.
Durfey Lloyd W.
Hou Ssujan
Kluger Jacob N.
Hindi Nabil
Xerox Corporation
Young Wayne R.
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