Developer roll adjustment indicator device

Details Developer roll adjustment indicator device Developer roll adjustment indicator device

1990-03-28

1990-12-25

Grimley, A. T.

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

33 1N, 355202, 355203, G03G 2100, G01C 1738

Patent

active

049793861

ABSTRACT:
A developer roll adjustment indicator device for use in association with a xerographic printer has an indicator plate with a collar that is removably secured to the end of the print drum shaft. A pointer made of a material having a magnetic attraction to the magnetic brushes in the developer roll is attached to the collar to permit the distal end of the pointer to freely rotate with respect to the axis of the print drum in response to the relative angular position of the magnetic brushes. The indicator plate has a number of visual indicia to measure the angular relationship of the pointer with respect to the axis of the print drum. Proper angular orientation of the indicator plate on the print drum shaft during installation is verified by means of a bubble level which provides a fixed point of reference for angular measurements.

REFERENCES:
patent: 4250513 (1981-02-01), Harlow et al.
patent: 4334772 (1982-06-01), Suzuki
patent: 4439034 (1984-03-01), Daniels
patent: 4466730 (1984-08-01), Jugle
patent: 4470693 (1984-09-01), Dolan
patent: 4690540 (1987-09-01), Manno

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