Sheet transportation device

Details Sheet transportation device Sheet transportation device

1997-05-15

1999-12-07

Grimley, Arthur T.

Electrophotography

Diagnostics

399 16, 399 18, G03G 1500

Patent

active

059997575

ABSTRACT:
A sheet transportation device for use in an image forming apparatus is provided which has self-diagnosis and self-repair functions. The sheet transportation device has a sheet transportation system including a plurality of units (8). A control sequence for a sheet transportation operation is applied from a system body (10) to the respective units (8). The units (8) each execute the control sequence to perform the sheet transportation operation. The units (8) are each constructed so as to perform an autonomous operation. This construction allows the respective units to autonomously perform self-diagnosis and repair operations. The fault diagnosis and repair operations are performed in parallel to the sheet transportation control. Therefore, the sheet transportation device can flexibly adapt itself to an external influence such as a change in the use environment and a malfunction due to a time-related change such as the aging of components thereof. Thus, the sheet transportation device ensures a highly reliable operation and yet requires less labor for the maintenance and inspection.

REFERENCES:
patent: 5239547 (1993-08-01), Tomiyama et al.

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