Browse Prior Art Database

Force Loaded Cleaning Station

IP.com Disclosure Number: IPCOM000079881D
Original Publication Date: 1973-Sep-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 3 page(s) / 64K

Publishing Venue

IBM

Related People

Davidge, RV: AUTHOR [+2]

Abstract

A force loaded cleaning station includes a rotating compliant wiper roll biased against a photoconductor drum for wiping engagement therewith, to remove excess toner therefrom.

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Force Loaded Cleaning Station

A force loaded cleaning station includes a rotating compliant wiper roll biased against a photoconductor drum for wiping engagement therewith, to remove excess toner therefrom.

Referring to Fig. 1, toner from photoconductor drum 1 is removed by wiper roll 2, turning in the direction of arrow 3, and toner from the wiper roll is removed by scavenger roll 4 turning in the direction of arrow 5, the toner being removed from scavenger roll 4 by scrapper blade 6. Toner thus removed is carried away from the cleaning station by auger 7 in trough 8b to be dropped through slot 8a (Fig. 2) in housing 8.

Wiper roll 2 comprises an elastomeric cylinder 9 molded over metal support cylinder 10 extending between end plugs 11, which turn with drive shaft 12. Scavenger roll 4 extends between end plugs 13 which turn with drive shaft 14. Drive shafts 12 and 14 and auger 7 rotate in bearings in housing 8 and in support plate 15 (Fig. 2), which is fastened rigidly to housing 8 by standoffs 16.

Referring to Fig. 2, the cleaning station is mounted to machine frame 17 by pivot arms 18, 19, and 20. The mechanism is configured so that station pivot 21 is colinear with scavenger roll drive shaft 14, and station pivots 22 and 23 are colinear with wiper roll drive shaft 12. In this arrangement, the line on each pivot arm between its associated station pivot and its frame pivot 24, 25, or 26 is essentially parallel to the plane of tangency between drum 1 and wiper roll 2 at their line of contact, and pivots 25 and 26 are essentially colinear.

Station pivots 21, 22, and 23 have sufficient axial play to allow each end of the station to pivot with respect to the other end, to compensate for axial variations of wiper roll 2 and drum 1, and for possible misalignment of the station with respect to drum 1.

Scavenger roll drive shaft 14 is driven by pulley 27 which, in turn is driven by a same diameter pulley 28 and belt 30, pulley 28 being mounted on drive shaft 29 which is essentially colinear with frame pivot 24. Wiper roll drive shaft 12 is driven...