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US 9,310,741 B2Granted
Image forming apparatus and colorimetric apparatus
AssigneeCanon Kabushiki Kaisha
InventorsNorio Matsui, Tomoharu Nakamura
Life of this patent
Estimating the term…
Abstract
When a colorimeter is colorimetrically measuring a test pattern, a control unit controls a motor such that the colorimeter and a facing member are closer to each other. A recording material on which the test pattern has been formed is brought into contact with the colorimeter. Even when the colorimeter is not colorimetrically measuring the test pattern, the control unit controls the motor such that the colorimeter and the facing member are closer to each other. The recording material on which the test pattern has been formed is brought into contact with the colorimeter.
Claims19
An image forming apparatus, comprising:
- a fixing unit that fixes a toner image to a recording material;
- a colorimetric unit that is provided on a conveyance path downstream of the fixing unit in a recording material conveyance direction, and colorimetrically measures a test pattern formed on the recording material;
- a facing member that is disposed facing the colorimetric unit with the conveyance path interposed therebetween;
- a drive unit that drives the colorimetric unit or the facing member such that the colorimetric unit and the facing member are closer to each other or separated from each other;
- and
- a control unit that controls the drive unit,
- wherein the colorimetric unit and the facing member are provided on a double-sided conveyance path through which, for image forming on both of a first face and a second face of a recording material, the recording material on which an image has been formed on the first face thereof is conveyed in order to form an image on the second face of the recording material, and
- in a case where single-sided printing is instructed, the control unit controls the drive unit such that the colorimetric unit and the facing member are closer to each other.
5 more elements
An image forming apparatus, comprising:
- a fixing unit that fixes a toner image to a recording material;
- a colorimetric unit that is provided on a conveyance path downstream of the fixing unit in a recording material conveyance direction, and colorimetrically measures a test pattern formed on the recording material;
- a facing member that is disposed facing the colorimetric unit with the conveyance path interposed therebetween;
- a drive unit that drives the colorimetric unit or the facing member such that the colorimetric unit and the facing member are closer to each other or separated from each other;
- and
- a control unit that controls the drive unit,
- wherein the colorimetric unit and the facing member are provided on a double-sided conveyance path through which, for image forming on both of a first face and a second face of a recording material, the recording material on which an image has been formed on the first face thereof is conveyed in order to form an image on the second face of the recording material, and
- in a case where double-sided printing is instructed, the control unit controls the drive unit such that the colorimetric unit and the facing member are closer to each other, and controls the drive unit such that the colorimetric unit and the facing member are temporarily separated from each other when the recording material on which an image has been formed on the first face thereof passes through the double-sided conveyance path.
5 more elements
An image forming apparatus, comprising:
- a fixing unit that fixes a toner image to a recording material;
- a colorimetric unit that is provided on a conveyance path downstream of the fixing unit in a recording material conveyance direction, and colorimetrically measures a test pattern formed on the recording material;
- a facing member that is disposed facing the colorimetric unit with the conveyance path interposed therebetween;
- a drive unit that drives the colorimetric unit or the facing member such that the colorimetric unit and the facing member are closer to each other or separated from each other;
- and
- a control unit that controls the drive unit,
- wherein, in a case where a contact condition for contact of the colorimetric unit with the recording material is satisfied, the control unit controls the drive unit such that the colorimetric unit and the facing member are closer to each other, so that contact of the colorimetric unit with the recording material is allowed, regardless of whether or not the test pattern has been formed on the recording material, and
- wherein the contact condition is that a result obtained by the colorimetric unit colorimetrically measuring a white reference plate provided at the facing member is out of an acceptable range.
5 more elements
An image forming apparatus, comprising:
- a fixing unit that fixes a toner image to a recording material;
- a colorimetric unit that is provided on a conveyance path downstream of the fixing unit in a recording material conveyance direction, and colorimetrically measures a test pattern formed on the recording material;
- a facing member that is disposed facing the colorimetric unit with the conveyance path interposed therebetween;
- a drive unit that drives the colorimetric unit or the facing member such that the colorimetric unit and the facing member are closer to each other or separated from each other;
- and
- a control unit that controls the drive unit,
- wherein the control unit is configured to control the drive unit such that the colorimetric unit and the facing member are closer to each other in a state where no recording material is present between the colorimetric unit and the facing member, the state being a measuring idle state where the colorimetric unit does no colorimetric measuring.
4 more elements
Dependencies are inferred from the claim text.