Browse Prior Art Database

PASSIVE COOLING DEVICE

IP.com Disclosure Number: IPCOM000025880D
Original Publication Date: 1988-Oct-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 74K

Publishing Venue

Xerox Disclosure Journal

Abstract

Copierlprinter machines store used toner cleaned from the machine photoreceptor in a remote sump. This toner is transported there through a system of passages, some of which contain rotating augers. Where a high volume of prints is run, a problem may occur as a result of these passages becoming clogged. Because toner in these passages show signs of blocking, it is suspected that the problem is in part temperature related.

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KEROX DISCLOSURE JOURNAL

PASSIVE COOLING DEVICE

Barry J. Gheer Wayne D. Fox

Richard E. Butts Edward P. deJong

Proposed Classification
U.S. C1.355/3DD Int. C1. G03g 15/00

Copierlprinter machines store used toner cleaned from the machine photoreceptor in a remote sump. This toner is transported there through a system of passages, some of which contain rotating augers. Where a high volume of prints is run, a problem may occur as a result of these passages becoming clogged. Because toner in these passages show signs of blocking, it is suspected that the problem is in part temperature related.

Tests indicated that the machine main drive motor is a major source of heat. These tests also suggest that to obtain reduced temperatures in the problem areas, a motor heat sink is required.

In modern day machines of the type alluded to, the machine main drive motor is typically mounted on the xerographic module. However, most xerographic modules have a plastic frame which provides a poor conductive path for the dissipation of heat. Furthermore, the xerographic module is usually located in an area which cannot be cooled by moving air without undesirably increasing the problem of machine contamination. As a result, the main drive motor tendency to heat up the surrounding machine components during long print runs.

To obviate this, a heat sink comprising a material with good heat flow characteristics of desired size and shape is attached to the machine frame, and through spring act...