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RESCAN DRIVE FOR MOVING PLATEN OR OPTICS CARRIAGE

IP.com Disclosure Number: IPCOM000024211D
Original Publication Date: 1979-Dec-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 50K

Publishing Venue

Xerox Disclosure Journal

Abstract

A moving platen or optics carriage C is driven in the rescan direction by a spindle 1 having a helical groove of variable pitch to provide controlled acceleration and deceleration. The spindle carries a follower 2 which is caused to engage the platen or carriage at the end of scan by a cam 3 and is disengaged by a cam 4 at the end of rescan. The spindle follower 2 may be returned to its start position during scanning either by reversing the spindle drive or by providing a large pitch reversing groove on the spindle (i.e., so that the groove is continuous with two different pitches). The continuous groove version is not used for scanning as well as rescan since a double helix produces judder as the follower crosses the groove junctions.

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(EROX DISCLOSURE JOURNAL

RESCAN DRIVE FOR MOVING PLATEN OR OPTICS CARRIAGE
J. Emmelot

Proposed Classification US. C1. 355/8
Int. C1. G03g 15/28

A moving platen or optics carriage C is driven in the rescan direction by a spindle 1 having a helical groove of variable pitch to provide controlled acceleration and deceleration. The spindle carries a follower 2 which is caused to engage the platen or carriage at the end of scan by a cam 3 and is disengaged by a cam 4 at the end of rescan. The spindle follower 2 may be returned to its start position during scanning either by reversing the spindle drive or by providing a large pitch reversing groove on the spindle (i.e., so that the groove is continuous with two different pitches). The continuous groove version is not used for scanning as well as rescan since a double helix produces judder as the follower crosses the groove junctions.

Volume 4 Number 6 November/December 1979 793

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November/December 6 Number 4 Volume XEROX 794 DISCLOSURE JOURNAL 1979

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