Image forming apparatus providing polygonal mirror having braking means
AssigneeKonica Corporation
InventorsKazumichi Yamauchi, Hiroshi Kobayashi
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Abstract
In an image forming apparatus in which an exposure is conducted by scanning of a laser beam, the apparatus includes a photoreceptor for forming a latent image thereon; an exposure device having a rotary polygonal mirror for exposing the photoreceptor, wherein the laser beam is deflected and scanned onto the photoreceptor by rotating the rotary polygonal mirror; a controller for controlling a linear speed of the photoreceptor; and a braking device for decreasing forcibly a speed of rotation of the polygonal mirror. When the controller decreases the linear speed of the photoreceptor according to an image formation mode, the braking device decreases the speed of rotation of the polygonal mirror.
Claims11
An image forming apparatus in which an exposure is conducted by scanning of a laser beam, said apparatus comprising:
- (a) a photoreceptor for carrying a latent image thereon;
- (b) exposure means having a rotary polygonal mirror for exposing said photoreceptor to form the latent image thereon, wherein the laser beam is deflected and scanned onto said photoreceptor by rotating the rotary polygonal mirror;
- (c) control means for controlling a linear speed of said photoreceptor;
- and
- (d) braking means for decreasing forcibly a speed of rotation of the polygonal mirror,
- wherein when said control means decreases the linear speed of said photoreceptor according to an image formation mode, said braking means decreases the speed of rotation of the polygonal mirror.
Dependencies are inferred from the claim text.