Patent ID: 11956391
Assignee: CANON KABUSHIKI KAISHA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An image reading apparatus comprising:
a first conveyance roller configured to convey a sheet along a conveyance path;
a first transparent member configured to be arranged on the conveyance path and to be opposed to a first surface of the sheet conveyed by the first conveyance roller;
a first reading unit configured to read a first image on the first surface of the sheet through the first transparent member at a first reading position of the first reading unit;
a first opposing roller configured to be rotatable, to be opposed to the first transparent member at the first reading position of the first reading unit, and to be opposed to a second surface opposite to the first surface of the sheet;
a driving unit configured to drive the first opposing roller;
a second transparent member configured to be arranged on the conveyance path and to be opposed to the second surface of the sheet conveyed by the first conveyance roller;
a second reading unit configured to read a second image on the second surface of the sheet through the second transparent member at a second reading position of the second reading unit downstream of the first reading position in a conveyance direction of the first conveyance roller;
a second opposing roller configured to be rotatable, to be opposed to the second transparent member at the second reading position of the second reading unit, and to be opposed to the first surface of the sheet; and
a second conveyance roller configured to convey the sheet when the second reading unit reads the second image on the sheet,
wherein the second conveyance roller is arranged at a position where a trailing edge of the sheet passes through the first reading position while the second conveyance roller is conveying the sheet, and
wherein the driving unit drives the first opposing roller so that a circumferential speed of the first opposing roller is faster than a circumferential speed of the second conveyance roller.