Browse Prior Art Database

Tension Release Roller for Photoconductor Belt Assembly

IP.com Disclosure Number: IPCOM000045435D
Original Publication Date: 1983-Mar-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 3 page(s) / 60K

Publishing Venue

IBM

Related People

Gibson, DK: AUTHOR [+2]

Abstract

Installation and replacement of a closed-loop belt over a capstan containing a plurality of mounting rollers is facilitated by mounting the movable tensioning roller so that accentuated inward/outward movement is available at the roller end closest to the operator. The device is particularly useful for xerographic or electrophotographic copiers/ printers employing closed-loop photoconductor belts.

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Tension Release Roller for Photoconductor Belt Assembly

Installation and replacement of a closed-loop belt over a capstan containing a plurality of mounting rollers is facilitated by mounting the movable tensioning roller so that accentuated inward/outward movement is available at the roller end closest to the operator. The device is particularly useful for xerographic or electrophotographic copiers/ printers employing closed-loop photoconductor belts.

Photoconductor belt 10 is positioned on mounting capstan assembly 11 where it is tracked around a series of rollers 12, 13, 14 and 15. At least one of the rollers of assembly 11 is a floating tension roller, roller 15 providing this function in the Fig. 1 embodiment. Springs 16 and 17 push outwardly on roller 15 and thus on belt 10, thereby supplying sufficient tension to conform belt 10 to the rollers. Then tension roller 15 is also used for tracking belt 10, it must meet the following requirements: 1) Roller 15 must pivot about belt 10 centerline to compensate for conical belts. 2) The roller must float inwardly and outwardly along the spring 16/17 axis only to provide tension on belt 10. 3) The roller must retain its front to rear position while performing the foregoing to maintain tracking accuracy. 4) Retraction of roller 15 by the operator is important to allow easy replacement of belt 10.

The mounting configuration of Figs. 2 and 3 attains the foregoing. Roller 20 has outwardly extending end flanges 21 and 22 to retain belt 10 in position. Roller 20 is pivotally mounted in yoke arrangement 25 which is itself pivotally secured to the machine frame around pivot point 26. Yoke 25 is normally biased in the tensioning direction as by springs 27 and 28. Thus, yoke 25 is mounted to function as a tension roll carriage relative to the machine...