Back to results
US 5,961,234 AGranted
Sheet conveying apparatus
AssigneeCanon Kabushiki Kaisha
InventorYoshio Uchikata
Life of this patent
Estimating the term…
Abstract
A sheet discharge roller is formed from material having great rigidity such as metal and has discharge roller convey portions and discharge roller groove portions (circumferential grooves) to which spurs are opposed. The spurs are not contacted with the sheet discharge roller. The discharge roller convey portions are surface-finished to increase a friction force. There is provided a recording apparatus in which sheet conveying accuracy is improved without transferring ink to a sheet to thereby obtain a high quality image with high resolving power.
Claims8
A recording apparatus comprising:
- recording means for recording an image on a sheet;
- and
- convey means for conveying the sheet on which the image was recorded by said recording means;
- wherein said convey means includes a sheet convey rotary member formed from a rigid body including a surface portion formed to increase a friction force and a plurality of circumferential grooves;
- and
- a plurality of sheet hold-down rotary members provided to be opposed to each position of said circumferential grooves so that said sheet hold-down rotary members can be inserted by means of biasing means into said circumferential grooves to an extent that said sheet hold-down rotary members are not contacted with surfaces defining said circumferential grooves, and, when the sheet is conveyed, said sheet hold-down rotary members are shifted outwardly by the sheet against said biasing means.
3 more elements
A sheet conveying apparatus comprising:
- a convey rotary member formed from a rigid body for conveying a sheet;
- hold-down rotary members for urging the sheet against said convey rotary member;
- and
- spring means for biasing said hold-down rotary members toward said convey rotary member,
- wherein a plurality of circumferential grooves are formed in an outer peripheral surface of said convey rotary member, and said hold-down rotary members are disposed at positions opposing said circumferential grooves and are supported so that said hold-down rotary members can be inserted into said circumferential grooves between said outer peripheral surface of said convey rotary member and a rotation center of said convey rotary member, and wherein when said spring means are not elastically deformed, said hold-down rotary members are inserted into said circumferential grooves but are not contacted with said circumferential grooves.
2 more elements
Dependencies are inferred from the claim text.