Document transport device and image forming apparatus
AssigneeFUJIFILM Business Innovation Corp.
InventorKenjo Nagata
Life of this patent
Estimating the term…
Abstract
A document transport device includes a placement portion, a slide member, a movable piece, and a detector. A document is to be placed on the placement portion. The slide member includes a document guide that contacts one lateral side of the document which is placed on the placement portion. The movable piece is provided to the slide member, and includes a shading pattern composed of plural patches that have plural densities corresponding to plural document sizes and having plural adjacent patch density differences that are different from each other. The detector detects a density of the shading pattern, and outputs an output signal for document size recognition.
Claims14
A document transport device comprising:
- a placement portion configured to support a document that is placed thereon;
- a slide member that includes a document guide rail that is configured to contact one lateral side of the document which is placed on the placement portion;
- a movable piece connected to the slide member and including a shading pattern composed of a plurality of patches that have a plurality of densities corresponding to a plurality of document sizes and having a plurality of adjacent patch density differences that are different from each other;
- and
- a detector configured to detect a density of the shading pattern and output an output signal for document size recognition,
- wherein a body of the slide member is provided so as to be slidable while being pressed against a back surface of the placement portion, and
- the detector is fixed to the back surface of the placement portion.
An image forming apparatus comprising:
- a document transport device;
- and
- a processor,
- wherein the document transport device includes
- a placement portion configured to support a document that is placed thereon,
- a slide member that includes a document guide rail that is configured to contact one lateral side of the document which is placed on the placement portion,
- a movable piece connected to the slide member and including a shading pattern composed of a plurality of patches that have a plurality of densities corresponding to a plurality of document sizes and having a plurality of adjacent patch density differences that are different from each other, and
- a detector configured to detect a density of the shading pattern, and
- wherein the processor is programed to recognize a size of the document on a basis of an output signal from the detector,
- a body of the slide member is provided so as to be slidable while being pressed against a back surface of the placement portion, and
- the detector is fixed to the back surface of the placement portion.
Dependencies are inferred from the claim text.