Reproduction machine having an automatic variable machine speed

Details Reproduction machine having an automatic variable machine speed Reproduction machine having an automatic variable machine speed

1999-07-21

2000-07-04

Braun, Fred L.

Electrophotography

Machine operation

399 67, G03G 1500

Patent

active

060850507

ABSTRACT:
An electrostatographic toner image reproduction machine is provided for producing toner reproductions of original images. The reproduction machine includes a frame; a movable image bearing member mounted to and having a path of movement within the frame; and electrostatographic process devices mounted for forming a toner image, transferring and fusing the toner image onto a copy sheet; and at least one status parameter defining a quality condition of the formed, transferred and fused toner images. The reproduction machine also includes measuring devices for measuring the at least one status parameter; at least first and second different machine speeds at which to operate the machine; and a machine controller connected to the measuring devices for automatically changing the machine speed in response to each of the at least one status parameter so as to ensure continued production of high quality toner images. The machine controller is programmed to read a Start-Of-Copy (SOCS) status of the at least one status parameter; a rate of change (ROC) of the at least one status parameter; an acceptable Normal End-Of-Copy value range (NEOCVR) of the at least one status parameter; and a Default machine speed (DMS) of the machine. The machine controller is also programmed to measure the at least one status parameter and calculate a Predicted End-Of-Copy Value (PEOCV) of the at least one status parameter given the DMS of the machine, to compare the PEOCV with the NEOCVR, and to automatically change the Default machine speed (DMS) of the machine to an Adjusted Machine speed (AMS) in order for the PEOCV of the at least one status parameter, given the AMS, to be within the acceptable NEOCVR, thereby ensuring continued production of high quality toner images.

REFERENCES:
patent: 5204698 (1993-04-01), LeSueur et al.
patent: 5349377 (1994-09-01), Gilliland et al.
patent: 5455656 (1995-10-01), Covert et al.
patent: 5587783 (1996-12-01), Nakamura et al.

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