Browse Prior Art Database

THERMAL AIRFLOW CONTROL VALVE

IP.com Disclosure Number: IPCOM000025728D
Original Publication Date: 1987-Aug-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 69K

Publishing Venue

Xerox Disclosure Journal

Abstract

In a combined printedcopier, air is typically used to cool the machine. However, when the printer ortion of the machine is in use, air is drawn through the copier optics an B the printing engine. This can be undesirable since dirt entrained with the air can contaminate the optics of the copier portion of the machine even though the copier is not being used.

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 83% of the total text.

Page 1 of 2

XEROX DISCLOSURE JOURNAL

THERMAL AIRFLOW CONTROL VALVE
Richard E. Butts
Barry S. Gheer
Joseph J. Brogan

6

Proposed Classification
U.S. C1.350/588 Int. C1. G02b

  TO BLOWER

In a combined printedcopier, air is typically used to cool the machine. However, when the printer ortion of the machine is in use, air is drawn through the copier optics an

R

        B the printing engine. This can be undesirable since dirt entrained with the air can contaminate the optics of the copier portion of the machine even though the copier is not being used.

To avoid this problem, and referring to the drawing Figure, the inlet passage 4 to the machine blower or fan has a control valve 5 disposed therein to close passage 4 and interrupt the flow of air therethrough when the copier portion of the machine is not in use. Passage 4 communicates with the copier optical area through the lamp housing 6 within which the exposure lamp 7 is mounted.

Valve 5 comprises a bi-metallic strip that responds to actuation of lamp 7 during operation of the copier portion of the machine and the increase in temperature of the air in passage 4 that results to move valve 5 to the open position shown by the dotted lines in the drawing Figure. This allows air to be drawn through passage 4, cooling the copier optical area.

Volume 12 Number 4 July/August 1987 189

[This page contains 1 picture or other non-text object]

Page 2 of 2

THERMAL AIRFLOW CONTROL VALVE (Cont'd)

When the printer portion of the machine is in use, lamp...