Browse Prior Art Database

Tensioning System For Photoconductor Belt

IP.com Disclosure Number: IPCOM000048725D
Original Publication Date: 1982-Mar-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Curran, WF: AUTHOR [+2]

Abstract

Noise and wear reduction for a closed-loop photoconductor belt system for copiers and the like is obtained by applying tension to the belt in proximity to the exit side from a drive sprocket.

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Tensioning System For Photoconductor Belt

Noise and wear reduction for a closed-loop photoconductor belt system for copiers and the like is obtained by applying tension to the belt in proximity to the exit side from a drive sprocket.

In Fig. 1, continuous loop photoconductor belt 10 is driven by sprocket 12 in a counterclockwise direction, as indicated by arrow 15. Belt 10 passes over stationary guides 16 and 18 as well as passing around idler pulley 20. Spring arm 25 is attached to machine frame member 26 and includes a shoe 28 so that inwardly directed tension is applied to belt 10, as shown.

Belt 10 is typically a relatively thin (e.g., .003 inch thick) photoconductor with a reinforcing strip 30 adhered to the edge on which the sprocket-engaging holes, such as 31, are located. Strip 30 can be typically a MYLAR* material .32 inch wide and .005 inch thick. The sprocket holes are punched through the strip for driving the belt 10. Driving of the belt is by filmed pin sprocket 12 which drives the belt on one side only, eliminating tolerance problems associated with dual-sprocket drives. Spring tensioner shoe 28 is located on the slack side of the belt and eliminates the opooing sound created by a fixed pin drive when belt 10 disengages the sprocket pins.

In Fig. 3, photoconductor belt 50, similarly constructed to belt 10, is tensioned by elements 51-54 for proper operating tension while accommodating belt removal. External force is applied to belt 50 as by xerograp...