Toner dispenser drive mechanisms

Claim 1

IN A DEVELOPING APPARATUS FOR DEVELOPING A ELECTROSTATIC LATENT IMAGE FORMED ON A XEROGRAPHIC DRUM WHEREIN THE DEVELOPING APPARATUS INCLUDES A DEVELOPER HOUSING HAVING A SUMP PORTION FOR DEVELOPER MATERIAL, A BUCKET-TYPE CONVEYOR MOUNTED WITHIN THE DEVELOPER HOUSING, A DRIVE CONNECTED TO THE CONVEYOR TO OPERATE THE CONVEYOR AT A PREDETERMINED SPEED TO CONVEY A DEVELOPER MATERIAL TO THE UPPER PORTION OF THE DEVELOPER HOUSING WHERE IT IS CASCADED ONTO THE DRUM, AND WHEREIN A TONER DISPENSER IS POSITIONED WITHIN THE DEVELOPER HOUSING, HE TONER DISPENSER INCLUDING A METERING ELEMENT TO DISPENE METERED QUANTITES OF TONERS TO THE DEVELOPER MATERIAL; THE IMPROVEMENT COMPRISING A VARIABLE SPEED DRIVE CONNECTED BETWEEN THE CONVEYOR AND THE METERING ELEMENT OF THE TONER DISPENSER WHEREBY TO VARY THE RATE AT WHICH TONER IS DISPENSED TO THE DEVELOPER MATERIAL, THE VARIABLE SPEED DRIVE INCLUDING A CIRCULAR DRIVE DISC ROTATED AT CONSTANT SPEED ABOUT AN AXIS BY SAID BUCKET-TYPE CONVEYOR DRIVE, A DRIVEN WHEEL, A CAM CONNECTED TO SAID DRIVEN WHEEL FOR ROTATION THEREWITH, A CONTROL LEVER PIVOTALLY CONNECTED TO SAID DEVELOPER HOUSING, SAID DRIVEN WHEEL AND SAID CAM BEING ROTATABLY SUPPORTED BY SAID CONTROL LEVER TO ROTATE ABOUT AN AXIS AT RIGHT ANGLES TO THE AXIS OF SAID CIRCULAR DRIVE DISC WITH THE PERIPHERAL SURFACE OF SAID DRIVEN WHEEL IN FRICTIONAL CONTACT WITH SAID DRIVE DISC, SAID CONTROL LEVER PERMITTING THE POSITION OF SAID DRIVEN WHEEL ON SAID CIRCULAR DRIVE DISC TO BE VARIED WITH RESPECT TO THE AXIS OF ROTATION OF SAID CIRCULAR DRIVE DISC TO VARY THE ROTATIVE SPEED OF SAID DRIVEN WHEEL AND THEREFORE SAID CAM WITH RESPECT TO THE SPEED OF SAID CIRCULAR DRIVE DISC, AND CAM FOLLOWER MEANS OPERATIVELY CONNECTED AT ONE END TO SAID CAM AND AT ITS OTHER END TO SAID TONER DISPENSER FOR EFFECTING OPERATION OF SAID TONER DISPENSER.