Tensioner to Assure Tight Photoconductor After Photoconductor Increment
Original Publication Date: 1988-Oct-01
Included in the Prior Art Database: 2005-Feb-15
A tensioning system is described which keeps the photoconductor (PC) tight on the drum during the running of the copier/printer. The system operates with the takeup tensioner independent of the supply spool. The tensioning system shown in the figure uses gear 10 which is attached to drive shaft 11 to drive the supply spool unlocking gear train 12, 13, 14, and 15. A separate gear 16 which floats on shaft 11 drives takeup gear train 17, 18, and 19. In operation, as drive shaft 11 is rotated clockwise, gear 10 unlocks the supply spool. High drag on gear 12 prevents unspooling of the supply roll on gear 15 unless shaft 11 is rotated. Pin 20 on shaft 11 contacts end 21 on torsion spring 22. The torque is transmitted to pin 23 on gear 16 through arm 24 on spring 22.