Image unit with guide unit movable in direction perpendicular to conveyance path

Patent metadata

Field	Value
Publication number	US-9674389-B2
Application number	US-201313916452-A
Country	US
Kind code	B2
Filing date	Jun 12, 2013
Priority date	Sep 14, 2012
Publication date	Jun 6, 2017
Grant date	Jun 6, 2017

Abstract

A medium conveyance apparatus including a first unit on one side of a conveyance path of a sheet-shaped medium, a second unit on the other side of the conveyance path and facing the first unit, a guide unit that is provided at the second unit and that contacts the medium between the first and second unit to move the second unit in a direction of separating from the conveyance path, an imaging unit provided at one of the first and second unit, a reference plate whose image can be captured by the imaging unit and that is provided at the other of the first and second unit, and a detecting unit for detecting the medium in the conveyance path, the detecting unit being provided in the conveyance path at an upstream position of a reading position where the imaging unit reads the medium.

First claim

What is claimed is:

1. A medium conveyance apparatus comprising:
a first unit fixed on one side of a conveyance path of a sheet-shaped medium;
a second unit provided on the other side of the conveyance path and facing the first unit;
a guide unit provided at the second unit and contacting the medium inserted into a gap between the first unit and the second unit to move the second unit in a direction away from the conveyance path;
an imaging unit provided at one of the first unit and the second unit;
a reference plate, an image of which can be captured by the imaging unit, and provided at the other one of the first unit and the second unit;
a detecting unit for detecting the medium conveyed in the conveyance path, and provided in the conveyance path at an upstream position of a reading position where the imaging unit reads the medium, with respect to the conveyance path; and
a processor for processing an image of the medium captured by the imaging unit, based on an image of the reference plate that has been captured, before the detecting unit detects a leading edge of the medium, and an image of the reference plate when the detecting unit detects the leading edge of the medium.

2. The medium conveyance apparatus according to claim 1 , further comprising a determining unit for determining whether or not the medium is positioned in a gap between the first unit and the second unit, in accordance with an output signal of the detecting unit.

3. A medium conveyance apparatus comprising:
a first unit fixed on one side of a conveyance path of a sheet-shaped medium;
a second unit provided on the other side of the conveyance path and facing the first unit;
a guide unit provided at the second unit and contacting the medium inserted into a gap between the first unit and the second unit to move the second unit in a direction away from the conveyance path;
an imaging unit provided at one of the first unit and the second unit;
a reference plate, an image of which can be captured by the imaging unit, and provided at the other one of the first unit and the second unit; and
a detecting unit for detecting the medium conveyed in the conveyance path, and provided in the conveyance path at an upstream position of a reading position where the imaging unit reads the medium, with respect to the conveyance path, wherein
the guide unit includes a path surface in a first plane parallel to a second plane of a surface of the second unit facing the first unit and the conveyance path, wherein
the detecting unit is provided at an upstream edge of the path surface of the guide unit with respect to the conveyance path so that the detecting unit detects the medium before the medium reaches the path surface of the guide unit, and wherein detecting unit detects a leading end of the medium and causes the imaging unit to capture the image of the reference plate responsive to said detection of the leading end, and
wherein the guide unit includes a hole in the first plane where a detection portion of the detecting unit is inserted therein for detecting the medium conveyed in the conveyance path.

4. The medium conveyance apparatus according to claim 3 , further comprising a determining unit for determining whether or not the medium is positioned in a gap between the first unit and the second unit, in accordance with an output signal of the detecting unit.

Assignees

• Pfu Ltd

Inventors

• Kanaya Shingo

Classifications

• H04N1/00615

  Guiding elements, e.g. plates · CPC title

• B65H2301/1421

  Single sheet or set of sheets · CPC title

• H04N1/2032 Primary

  of two pictures corresponding to two sides of a single medium (refeeding a sheet for double-sided scanning H04N1/00572) · CPC title

• H04N1/00045

  using a reference pattern designed for the purpose, e.g. a test chart · CPC title

• H04N1/00716

  Thickness · CPC title