Techniques for generating status messages in image forming appar

Details Techniques for generating status messages in image forming appar Techniques for generating status messages in image forming appar

1997-06-24

1998-12-15

Pendegrass, Joan H.

Electrophotography

Diagnostics

Consumable

399 81, G03G 1560, G03G 2116

Patent

active

058505830

ABSTRACT:
An image forming apparatus includes detachable expendables such as a photosensitive drum, a toner cartridge, an ozone filter, etc. The image forming apparatus counts a number of papers being printed after replacing the expendable and stores a counting value as an amount of use in a nonvolatile memory, and prints out a status message including the amount of use, periodically or whenever the image forming apparatus is turned on. Further, the status message includes a predetermined test pattern for testing the printing status of the printer. In the light of the status message, the user may predict in advance the proper replacing time and cope with degradation of the images by checking the printing status from the test pattern at any time.

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