US 5,689,756 A · Rotation abnormality detecting device for use in image forming apparatus

Abstract

An image forming apparatus includes a process unit provided detachably attachable to the apparatus; a driving source provided inside the apparatus and outside the process unit; a power transmitter to transmit a driving force from the driving source; a rotary member provided inside the process unit, the rotary member being rotated by the driving force from the driving source transmitted through the power transmitter. The apparatus further includes a detector to detect a state of rotation of the rotary member, and to output a signal corresponding to the state of rotation of the rotary member; and a judging member to judge a rotation abnormality of the rotary member on the basis of the signal output from the detector.

Claims16

Dependent claims

An image forming apparatus comprising:

(a) a unit provided detachably attachable to said apparatus for forming an image;
(b) a driving source provided inside said apparatus and outside said unit;
(c) transmission for transmitting a driving force from said driving source;
(d) a rotary member inside said unit, said rotary member being rotated by the driving force from said driving source transmitted through said transmission;
(e) a detector adapted to detect a characteristic value indicating an image forming condition of said unit, said detector outputting a signal indicative of said value;
(f) a control for controlling said image forming condition on the basis of said signal from said detector so that said characteristic value is maintained constant;
and
(g) a judging device for recognizing a rotation abnormality of said rotary member based only on said signal from said detector.

5 more elements

Dependencies are inferred from the claim text.

Rotation abnormality detecting device for use in image forming apparatus

Life of this patent

Rotation abnormality detecting device for use in image forming apparatus

Life of this patent

Abstract

Claims16