Image reading apparatus and image reading method
AssigneeSeiko Epson Corporation
InventorShinsuke Kogi
Life of this patent
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Abstract
An image reading apparatus which reads an image of a document is provided with a transport unit (rollers, and the like) which transports a document, a reading unit which reads a document, a double feeding detecting sensor (double feeding detecting unit) which can detect double feeding of a document, and a carrier sheet sensor (CS sensor) (sheet detecting unit) which detects a carrier sheet which is transported in a state of interposing a document between two transparent sheet portions. The CS sensor is provided at a position on the upstream side of the double feeding detecting sensor in the transport direction, in a transport direction of a document.
Claims13
An image reading apparatus which reads an image of a document, the apparatus comprising:
- a plurality of pairs of rollers which transports a document;
- an image sensor which reads a document;
- a double feeding detector which detects double feeding of a document;
- a first sheet detector which detects a carrier sheet which is transported in a state of interposing a document between two transparent sheet portions;
- and
- a lever-type document presence detector that detects a document and is arranged on a downstream side of the double feeding detector and the first sheet detector in a transport direction of a document,
- the first sheet detector being provided at a position on an upstream side of the double feeding detector in the transport direction.
An image reading method comprising:
- transporting a carrier sheet in which a portion to be detected is provided in a bonding portion which forms a sheet portion for interposing a document by bonding two transparent sheets at a part of a peripheral edge portion, in a state of interposing a document in the sheet portion;
- detecting in which the portion to be detected is detected in the middle of transporting the carrier sheet by a first sheet detector;
- detecting double feeding of a document by a double feeding detector;
- reading in which a front face image and a rear face image are obtained, by reading a front face and a rear face of a document which is interposed between the sheet portion, in the middle of transporting the carrier sheet;
- detecting a document by a lever-type document presence detector that is arranged on a downstream side of the first sheet detector and the double feeding detector in a transport direction of a document;
- specifying a combining direction in which a side at which the front face image and the rear face image are combined, based on a detection result which is obtained by detecting the portion to be detected;
- and
- image processing in which the front face image and the rear face image are combined at the specified side, and a combined image is generated.
Dependencies are inferred from the claim text.