Browse Prior Art Database

DOCUMENT TRANSPORT BELT POSITION SENSING SYSTEM

IP.com Disclosure Number: IPCOM000024022D
Original Publication Date: 1979-Jun-30
Included in the Prior Art Database: 2004-Apr-01
Document File: 2 page(s) / 179K

Publishing Venue

Xerox Disclosure Journal

Abstract

Various positions along a document transport web, such as document registration positions, belt-end positions, etc., may be encoded by respective, distinctive perforation patterns in the edge of the web which are sensed by optical detectors recognizing the perforation patterns. The optical detectors may be connected to a copier control for controlling the direction of movement and stopping positions of the web. This encoding pattern may be provided by a difference in the number of

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

XEROX DISCLOSURE JOURNAL

DOCUMENT TRANSPORT BELT POSITION Proposed Classification SENSING SYSTEM U.S. Cl. 355/8
Edward M. VanWagner mt. CL G03g 15/28

Various positions along a document transport web, such as document registration positions, belt-~end positions, etc., may be encoded by respective, distinctive perforation patterns in the edge of the web which are sensed by optical detectors recognizing the perforation patterns. The optical detectors may be connected to a copier control for controlling the direction of movement and stopping positions of the web. This encoding pattern may be provided by a difference in the number of these holes in a group of holes spaced transversely of or along the direction of web movement.

It is possible to use only a ~ optical or other sensor by encoding the document belt positions with different between the holes and by having all the holes lo~g~gj~xis in the direction of movement of the belt. The single sensor and its connecting controller recognizes the position of the web passing the sensor by the frequency of interruption of the signal (due to the change in frequency of the hole spacing), where the belt velocity is either constant or is known and available as a signal for comparison in the controller.

Volume 4 Number 3 May/june 1979 397

[This page contains 1 picture or other non-text object]

Page 2 of 2

6L61 aunc/ke~4 £ .iaqwn~ ~ awnmo~

JVNUDOC ~NflSO1DSIG XON2X

[This page contains 1 picture or other non-text object]