Browse Prior Art Database

Drum Removal System

IP.com Disclosure Number: IPCOM000052301D
Original Publication Date: 1981-May-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Bruce, WH: AUTHOR [+2]

Abstract

In a xerographic copier which incorporates an air filtration system inside the photoconductor drum, air enters and leaves the filtering chamber in drum 10 through cylindrical housing 11 which is coaxial with the photoconductor drum but does not rotate with it (Fig. 1a). In addition to accommodating the air flow path, this housing also provides a drum-removal system.

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Drum Removal System

In a xerographic copier which incorporates an air filtration system inside the photoconductor drum, air enters and leaves the filtering chamber in drum 10 through cylindrical housing 11 which is coaxial with the photoconductor drum but does not rotate with it (Fig. 1a). In addition to accommodating the air flow path, this housing also provides a drum-removal system.

Assembly 11 consists of inner 12 and outer 13 slip rings and spring-loaded drum support plunger 14. Outer ring 13 can be rotated using handle 15 and thereby telescoped over inner ring 12.

In the operating position, drum 10 is supported by drive shaft 16 and extended plunger 14, with slip ring 13 also in the fully extended position. The two supports provide alignment of the drum.

To remove the drum, first lifting handle 17 is attached, and then outer ring 13 is rotated 90 degrees, telescoping it over inner ring 12 to automatically withdraw support plunger 14 from drum 10 and provide clearance for vertical removal of the drum (Fig. 1b). The drum is returned to the machine and its operating position by the reverse procedure.

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