| 摘要 |
An image formation appts. includes (a) a device for developing an electrostatic latent image by developer supply; (b) a device for transporting the developer to the developing device; (c) a device (41), for operating the transport device; (d) a device (42) for supplying current to the operating device (41); and (e) a device (43) which is connected between the operating and supply devices (41,42) for heating these devices by means of the supplied current and which has a first resistance value at a predetermined temp. and a second higher resistance value at above the predetermined temp.. USE/ADVANTAGE - In an electronic copier etc. The appts. has a simple arrangement for preventing damage caused e.g. by motor winding short-circuiting when the supplied current is excessive or by excessive temp. increase of the motor control circuit, prevention being effected by a simple circuit element. |
