Browse Prior Art Database

Toner Replenisher Clutch

IP.com Disclosure Number: IPCOM000082011D
Original Publication Date: 1974-Sep-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 62K

Publishing Venue

IBM

Related People

Cox, GL: AUTHOR [+3]

Abstract

A toner replenisher clutch is employed to couple a continuous drive source to a toner metering roll which is driven at a slow speed against a high friction torque, resulting in extremely small overthrow once the positive drive through the clutch is stopped. The clutch is designed to create pawl clearance independent of the overthrow of the driven shaft, to thereby reduce wear of the pawl and ratchet.

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Toner Replenisher Clutch

A toner replenisher clutch is employed to couple a continuous drive source to a toner metering roll which is driven at a slow speed against a high friction torque, resulting in extremely small overthrow once the positive drive through the clutch is stopped. The clutch is designed to create pawl clearance independent of the overthrow of the driven shaft, to thereby reduce wear of the pawl and ratchet.

Clutch 11 is placed between continuously driven gear 12 and toner replenisher shaft 13 which drives toner replenisher roll 14. Replenisher shaft 13 is driven when solenoid coil 15 is energized to attract armature 17. When armature 17 moves enough to clear the step on cam ring 19, pawl spring 21 pulls pawl 23 which pivots about pivot 25 such that the lug on pawl 23 engages tooth ratchet 27. As pawl 23 is pivoted, pin 29 fixed to pawl 23 cams down the cam surface 31 on cam ring 19 to rotate cam ring 19 in the direction of replenisher shaft 13 rotation. Ratchet 27 is rigidly fixed to carrier plate 33 which is fixed to shaft 13.

With pawl 23 engaged with ratchet 27, replenisher shaft 13 is driven. Rotation of shaft 13 continues until the step on cam ring 19 contacts armature
17. Solenoid 15 must be de-energized before one revolution of shaft 13 occurs. When the step on cam ring 19 contacts armature 17 rotation continues and armature 17 and stop arm 37 are displaced by pivoting about pivot 38, until stop arm 37 contacts stop 39. At this time, pawl...