Browse Prior Art Database

TIMING BELT DERAILER Disclosure Number: IPCOM000024343D
Original Publication Date: 1980-Jun-30
Included in the Prior Art Database: 2004-Apr-02

Publishing Venue

Xerox Disclosure Journal


A multi-speed drive, which includes a derailer mechanism, is used as a transmission for driving a multi-speed document handler in an automatic office copier. Figure 1 is a cross section of the derailer mechanism in which a drive belt 8 is shifted from a first small pulley 10 to a second large pulley 12 when the cam 14 is rotated thereby pushing the belt between the flanges of the smaller pulley 10 and the spiral cam surface 18 on the cam flange 20. In this manner, the spiral cam assists in making the belt quickly climb from the smaller pulley to the larger pulley and