US 7,202,983 B2Granted

Image reading apparatus

AssigneeCanon Kabushiki Kaisha

InventorsMasahiko Yokota, Haruo Ishizuka, Tsuyoshi Yoshida

Life of this patent

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Abstract

In an image reading apparatus having a first original reading device for reading one side of an original guided and fed by a guide, and a second original reading device disposed downstream of the first original reading device for reading the other side of the original, the guide is bent between the first original reading device and the second original reading device so as to shield the respective reading devices. The bending of the guide is done by bending an original feeding path so that direct rays and diffraction rays from each of two light sources may not enter respective photoelectric transfer elements associated with other light source, to thereby shield the photoelectric transfer elements from light of a light source not associated therewith.

Claims11

Dependent claims

An image reading apparatus comprising:

an original feeding path;
a first original reading device configured and positioned to read one side of an original guided by said original feeding path;
and
a second original reading device disposed downstream of said first original reading device and configured and positioned to read the other side of the original,
wherein said original feeding path is defined by a first original guide opposed to a reading surface of said second original reading device and a second original guide opposed to said first original guide, and
wherein said first original guide and said second original guide are bent between said first original reading device and said second original reading device to shield said second original reading device from light used for reading the one side of the original by said first original reading device and to shield said first original reading device from light used for reading the other side of the original by said second original reading device.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/222,823Filed 19 Aug 2002
Priority: JP 2001-25209922 Aug 2001
Published: US 2003/0038989 A127 Feb 2003
Granted: 10 Apr 2007
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

H04N 1/2032
Simultaneous scanning of two or more separate pictures , e.g. two sides of the same sheet: of two pictures corresponding to two sides of a single…
H04N 1/203
Scanning arrangements , i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing…:…
H04N 1/2034
Of two pictures corresponding to two sides of a single medium: at identical corresponding positions, i.e. without time delay between the two image…
H04N
Pictorial communication