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TORQUE AND CONTINUITY TESTING APPARATUS FOR A PRINT CARTRIDGE

IP.com Disclosure Number: IPCOM000026132D
Original Publication Date: 1990-Aug-31
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 116K

Publishing Venue

Xerox Disclosure Journal

Abstract

Production of customer replaceable xerographic print cartridges, gives rise to a need for a testing apparatus suitable for testing the torque and continuity characteristics of the development rolls within the replaceable cartridge. Furthermore, such an apparatus enables the execution of the tests in a minimal amount of time, thereby reducing the impact to the time required to produce the print cartridges.

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XEROX DISCLOSURE JOURNAL

TORQUE AND CONTINUITY Proposed Classification TESTING APPARATUS FOR A
PRINT CARTRIDGE
Jeffrey M. Koff
Brian R. Webster

U.S. C1.073/052 Int. C1. GOlm 3/00

12 - / 20

FIG. I

XEROX DISCLOSURE JOURNAL - Vol. 15, No. 4 July/August 1990 187

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

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TORQUE AND CONTINUITY TESTING APPARATUS FOR A PRINT CARTRIDGE( Cont'd)

Production of customer replaceable xerographic print cartridges, gives rise to a need for a testing apparatus suitable for testing the torque and continuity characteristics of the development rolls within the replaceable cartridge. Furthermore, such an apparatus enables the execution of the tests in a minimal amount of time, thereby reducing the impact to the time required to produce the print cartridges.

Figure 1 is a schematic illustration of an apparatus designed to test the driving torque required to drive the magnetic developer roll and the receiver roll within a xerographic print cartridge. In addition, the apparatus is capable of performing electrical continuity checks on the internal rolls and contact points. Figure 2 is a detailed cross section of probe head 30 of Figure 1.

Referring to both figures, print cartridge 10, having a magnetic roll 12 and a receiver roll 14, sealed therein and independently driven via external couplings 16 and 18 respectively, is engaged and tested by moving assembly 20 in the direction of arrow 22. After sufficient travel, probe heads 30 will engage external drive couplings 16 and 18, thereby enabling probe heads 30 to impart independent rotational forces to magnetic roll 12 and receiver roll 14. The rotational...