US 3,990,792 AGranted

Reciprocating movement control device

AssigneeCanon Kabushiki Kaisha

InventorsToshihiro Kono, Akiyoshi Torigai

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Abstract

In a copying apparatus having an original carriage and an optical system, a reciprocating movement control device comprises a drive source for driving a photosensitive medium and drive transmission means effective only during forward movement to transmit the drive of the drive source to cause relative movement of the original carriage and the optical system. Righting moment accumulator means is provided for accumulating therein a righting moment with the aid of the drive source during the forward movement to cause backward movement of the original carriage or the optical system. The drive transmission means may be released by a scanning completion signal to thereby permit the righting moment accumulated in the accumulator means during forward movement to backwardly move the original carriage or the optical system and to control the speed of the backward movement.

Claims14

Dependent claims

A control device for a copying apparatus, comprising a body mounted for reciprocating movement;

stop means for stopping said body at a stop position at one end of the path of reciprocating movement;
brake means for selectively imparting braking forces to said reciprocating body;
said brake means including a pivotally mounted member for controlling said braking forces, means for pivotally moving said member in a first direction when said reciprocating body is moved forwardly away from said stop means, wherein said braking means applies a first braking force to said movable body at the commencement of said forward movement, and means for pivotally moving said member in a second direction when said reciprocating body is moved rearwardly toward said stop means, wherein said braking means applies a second braking force to said movable body as the latter moves rearwardly and approaches said stopping means, and wherein said brake means includes means for releasably maintaining said movable body in sait stop position at the termination of forward and rearward reciprocal movement of said body.

Dependencies are inferred from the claim text.