SHEET CONVEYANCE APPARATUS, AND IMAGE FORMING APPARATUS AND IMAGE READING APPARATUS
First Claim
Patent Images
1. A sheet conveyance apparatus comprising:
- an skew correction unit configured to rotate a sheet while conveying the sheet to correct skew of the sheet;
a lateral registration correction unit which is arranged downstream from the skew correction unit, the lateral registration correction unit configured to move the conveyed sheet in the direction orthogonal to the sheet conveyance direction to correct a sheet position; and
a sheet conveyance assist unit which is arranged upstream from the skew correction unit, the sheet conveyance assist unit configured to move the conveyed sheet in the direction orthogonal to the sheet conveyance direction,wherein after skew correction of the sheet is performed by the skew correction unit, the lateral registration correction unit moves the sheet in the direction orthogonal to the sheet conveyance direction, and the sheet conveyance assist unit moves the sheet in the direction orthogonal to the sheet conveyance direction in synchronization with movement operation of the sheet by the lateral registration correction unit.
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Abstract
A sheet conveyance apparatus provides skew correction roller pairs which rotate a sheet while conveying the sheet to correct skew of the sheet, and lateral registration roller pairs which moves the sheet in a direction orthogonal to the sheet conveyance direction to correct the lateral registration. When the lateral registration is corrected, assist roller pairs arranged downstream is moved in the same direction as the lateral registration roller pairs in synchronization with the lateral registration roller pairs.
40 Citations
10 Claims
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1. A sheet conveyance apparatus comprising:
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an skew correction unit configured to rotate a sheet while conveying the sheet to correct skew of the sheet; a lateral registration correction unit which is arranged downstream from the skew correction unit, the lateral registration correction unit configured to move the conveyed sheet in the direction orthogonal to the sheet conveyance direction to correct a sheet position; and a sheet conveyance assist unit which is arranged upstream from the skew correction unit, the sheet conveyance assist unit configured to move the conveyed sheet in the direction orthogonal to the sheet conveyance direction, wherein after skew correction of the sheet is performed by the skew correction unit, the lateral registration correction unit moves the sheet in the direction orthogonal to the sheet conveyance direction, and the sheet conveyance assist unit moves the sheet in the direction orthogonal to the sheet conveyance direction in synchronization with movement operation of the sheet by the lateral registration correction unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An image forming apparatus comprising:
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a sheet conveyance apparatus including, a skew correction unit configured to rotate a sheet while conveying the sheet to correct skew of the sheet; a lateral registration correction unit which is movable and arranged downstream from the skew correction unit in a direction orthogonal to a sheet conveyance direction, the lateral registration correction unit configured to move in the direction orthogonal to the sheet conveyance direction while holding the conveyed sheet to correct a sheet position; and a sheet conveyance assist unit which is arranged upstream from the skew correction unit, the sheet conveyance assist unit configured to move in the direction orthogonal to the sheet conveyance direction while holding the conveyed sheet, wherein after skew correction of the sheet is performed by the skew correction unit, the lateral registration correction unit moves in the direction orthogonal to the sheet conveyance direction while holding the sheet, and the sheet conveyance assist unit moves in a direction of the lateral registration correction unit in synchronization with movement of the lateral registration correction unit while holding the sheet; and an image forming unit configured to form an image on a sheet conveyed by the sheet conveyance apparatus.
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10. An image reading apparatus comprising:
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a sheet conveyance apparatus including, a skew correction unit configured to rotate a sheet while conveying the sheet to correct skew of the sheet; a lateral registration correction unit which is movable and arranged downstream from the skew correction unit in a direction orthogonal to a sheet conveyance direction, the lateral registration correction unit configured to move in the direction orthogonal to the sheet conveyance direction while holding the conveyed sheet to correct a sheet position; and a sheet conveyance assist unit which is arranged upstream from the skew correction unit, the sheet conveyance assist unit configured to move in the direction orthogonal to the sheet conveyance direction while holding the conveyed sheet, wherein after skew correction of the sheet is performed by the skew correction unit, the lateral registration correction unit moves in the direction orthogonal to the sheet conveyance direction while holding the sheet, and the sheet conveyance assist unit moves in a direction of the lateral registration correction unit in synchronization with movement of the lateral registration correction unit while holding the sheet; and an image reading unit configured to read an image of a sheet conveyed by the sheet conveyance apparatus.
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Specification