Brother Kogyo Kabushiki-kaisha

Tsuyoshi Kushida

Shinji Kimura

Hiroshi Igarashi

Noritsugu Ito

Yukichi Sawaki

Yuji Asano

Masatoshi Yoshiyama

Satoru Kuwabara

Masanari Kobayashi

Hisanori Okamoto

Shin Asai

Kanae Imaeda

An image forming device includes a main body casing, a cover configured to be openable and closable with respect to the main body casing, a sensing unit configured to sense an opening-closing operation of the cover, a forming unit configured to form an image on a sheet, a detecting unit configured to perform a detecting operation to detect a deviation of an image forming position of the image to be formed by the forming unit, an accepting unit configured to accept a print request, and a control unit configured to control the detecting unit to perform the detecting operation in response to the print request being accepted when the sensing unit senses an opening-closing operation of the cover after execution of a previous detecting operation, and thereafter to control the forming unit to form the image in the image forming position corrected to cancel the deviation detected in the detecting operation.

Image forming device, method, and computer readable medium to avoid unnecessary image forming position correction

There is provided an image formation device, comprising: an image forming unit configured to execute image formation to form an image on a recording medium; a holding body configured to move relatively with respect to the image forming unit and to hold an image formed thereon by the image forming unit; a controller that controls the image forming unit to form a correction pattern in an area on the holding body, the area corresponding to an image formation area defined on the recording medium when the image formation is executed for the recording medium; a measurement unit configured to measure a position of the correction pattern formed on the holding body; and a correction unit configured to correct an image formation position of the image formation unit based on a measurement result of the measurement unit.

Displacement detection and correction in an image formation device

An image forming device includes a rotational body carrying a sheet thereon, the rotational body including first regions defined thereon that begin with respective different phases on the rotational body, a forming unit forming an image on one of the rotational body and the sheet carried on the rotational body, a storage unit storing thereon information regarding positional deviations of images formed within each of the first regions, a region specifying unit that determines a variation of the positional deviations of the images within each of the first regions based upon the information stored and specifies one of the first regions based upon the determined variation, and a control unit controlling the forming unit to form an intended image of which an image forming position is corrected based upon the information stored, in the first region specified on the rotational body.

Image forming device for printing in a selected region, and method and computer readable medium therefor

An image forming device includes an image forming unit forming an image on a sheet with an image forming property, a pattern forming unit forming a pattern on an object, a detection value determining unit determining a first detection value representing the image forming property of the image forming unit through detecting the pattern formed on the object by the pattern forming unit, a storage unit storing thereon the first detection value determined by the detection value determining unit, a correction value determining unit determining a correction value for correcting the image forming property with the first detection value stored on the storage unit and a second detection value that has previously stored on the storage unit, and a control unit controlling the image forming unit to form the image with the image forming property corrected based upon the correction value determined by the correction value determining unit.

Image forming device, and method and computer readable medium therefor

A sheet feeding device has a correction value storage memory which stores a plurality of correction values for the previously set sheet feed error of the sheet feeding mechanism. The drive-control section operates to control the sheet feed amount by one correction value which allows the feed error of the sheet feeding mechanism to be minimized, the value being selected from the correction values stored in the correction value storage memory. In such the manner, the sheet feed amount is corrected by the correction value, so that the feed error of each component of the sheet feeding mechanism can be easily corrected.

Sheet feeding device and correction method of sheet feed amount in the

A sheet feeding device has a correction value storage memory which stores correction values for the sheet feed error of the sheet feeding mechanism which appears in a specific cycle from a reference point to correct the sheet feed error, and a sensor which detects a particular point in the specific cycle. In accordance with the input from the sensor, the sheet feed amount is corrected by the correction value stored in the correction value storage memory. By correcting the feed error of each component of the sheet feeding mechanism, an exact and reliable sheet feed can be achieved without needing the increase of precision of the components of the sheet feeding mechanism.

According to the sheet supply device of this invention, a sheet supplied from a sheet supply cassette is fed to a reference position. On the basis of a distance between where the sheet is fed from the reference position to where a tip portion of the sheet is detected by a sheet detection sensor, a sheet feed amount is determined. The sheet feed amount corresponds to the position where the sheet will be fed to a sheet supply completion position after the tip portion of the sheet is detected by the sheet detection sensor. Accordingly, the tip portion of the fed sheet is accurately located at the sheet supply completion position. Thus, an image can be formed at a predetermined position on the sheet through printing, copying or other image-forming operations.

Sheet supply device for aligning a sheet at a reference position

An image recording apparatus which records an image of an original document on an image receiving sheet with the use of a photosensitive recording medium, the image receiving sheet having front and rear faces differing in reflection ratio. To detect error in sheet face orientation, a sheet face sensor unit is provided upstream of a pressure developing unit which discriminates a face of the image receiving sheet. The sensor unit includes a light emitting element for emitting light toward the face of the image receiving sheet and a light receiving element for receiving light emitted from the light emitting element and reflected on the face of the image receiving sheet. A central processing unit is supplied with data representative of amounts of light emitted from the light emitting element and light received at the light receiving element, wherein the central processing unit computes a reflection ratio based on the data supplied thereto and produces a discrimination signal indicative of an error in sheet face orientation of the image receiving sheet based on the reflection ratio being computed.

Growing community of inventors

Aichi, Japan

Tsuyoshi Kushida