Browse Prior Art Database

Conveyor Roll Clutch

IP.com Disclosure Number: IPCOM000082009D
Original Publication Date: 1974-Sep-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 77K

Publishing Venue

IBM

Related People

Daniels, RA: AUTHOR [+2]

Abstract

Developer material is applied to a magnetic brush developing roll by a magnetic conveyor roll. The conveyor roll is clutched into and out of a common drive system utilized to drive the magnetic brush roll, to thereby control the application of developer material to the magnetic brush roll.

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Conveyor Roll Clutch

Developer material is applied to a magnetic brush developing roll by a magnetic conveyor roll. The conveyor roll is clutched into and out of a common drive system utilized to drive the magnetic brush roll, to thereby control the application of developer material to the magnetic brush roll.

A continuously rotating magnetic brush roll 11 applies developer material to the rotating drum 13 having an electrostatic image thereon. Developer material is conveyed to the magnetic brush roll 11 from the sump 15 by the rotating conveyor roll 17. Counterrotating augers 19 stir the developer mix and dispenser roll 21 applies fresh toner to the developer mix.

The magnetic brush roll 11, conveyor roll 17, the augers 19 and the dispenser roll 21 are driven by a common drive chain 23. A spring clutch 25 couples the drive of the drive chain to conveyor roll 17. The conveyor roll is clutched on only during the time that electrostatic images on the drum 13 are passing the magnetic brush 11. During runout, start-up, and drum incrementing cycles, the drive to the conveyor roll 17 is uncoupled, thereby reducing developer material wear.

When the conveyor roll 17 is turned off, developer material flow to the magnetic brush roll 11 is halted. The clutching of the conveyor roll 17 also reduces chain stretch, by reducing the starting torque required to start up the developer unit.

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