Browse Prior Art Database

Photoconductor Cleaning Station

IP.com Disclosure Number: IPCOM000079882D
Original Publication Date: 1973-Sep-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 3 page(s) / 81K

Publishing Venue

IBM

Related People

Bullock, MK: AUTHOR [+7]

Abstract

A rotating compliant wiper cleaning roll is biased against a photoconductor drum for wiping engagement therewith. The biasing system is designed to provide a constant normal force loading between the roll and drum despite roll concentricity variations, and varying frictional forces at the engagement surfaces occasioned by varying quantities of toner, which need to be cleaned from the photoconductor drum.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 52% of the total text.

Page 1 of 3

Photoconductor Cleaning Station

A rotating compliant wiper cleaning roll is biased against a photoconductor drum for wiping engagement therewith. The biasing system is designed to provide a constant normal force loading between the roll and drum despite roll concentricity variations, and varying frictional forces at the engagement surfaces occasioned by varying quantities of toner, which need to be cleaned from the photoconductor drum.

Photoconductor drum 1 turns on fixed bearings, in the direction of arrow 2, past conventional electrophotographic process stations including charge corona 3, exposure station 4, developer station 5, at which toner is deposited on the photoconductor surface, and transfer station 6 at which toner is transferred to paper 7. Toner remaining on the surface of drum 1 after transfer, is removed by wiper roll 8 turning in the direction of arrow 9. Toner is removed from wiper roll 8 by scavenger roll 10 turning in the direction of arrow 11. Toner on scavenger roll 10 is removed by scrapper blade 12 which is held against its surface, the toner falling off into a collection apparatus, not shown.

Wiper roll 8 is mounted on a shaft turning in bearings on pivot arms 14 and 15 which, in turn, pivot on shaft 16 mounted through machine frame 17. Similarly, scavenger roll 10 is mounted on a shaft turning in bearings in pivot arms 18 and 19 which, in turn, pivot on shaft 20 through frame 17. Scrapper blade 12 is mounted on holding bracket 21 which is pivotally mounted on arms 22 and 23, which are in turn pivoted on shaft 24 through frame 17 and on arm 25 pivoted on shaft 27 through frame 17.

The scrapper blade mechanism is force loaded against scavenger roll 10 by springs 28 and 29, operating between arms 18 and 22 and arms 19 and 23, respectively. The scavenger roll mechanism is force loaded against wiper roll 8 by extension spring 30, operating between pivot arms 14 and 18 and by a spring, not shown, operating between pivot arms 15 and 19. The wiper roll mechanism is force loaded against drum 1 by extension spring 31, operating between pivot arm 14 and machine frame 17 and by a similar spring on the opposite side.

Motor 32 drives pulley assemblies 33 and 34 which rotate in bearings on shafts 16 and 20, respectively, by belt 35. Wiper roll 8 is driven by pulley 36 from pulley assembly 33 by belt 37. Similarly, scavenger roll 10 is driven by pulley 38 attached to its shaft and pulley assembly 34 by belt 39. Pulleys around which belt 37 operates have essentially the same diameters. Similarly, the pulleys aroun...