Konica Minolta Business Technologies, Inc.

Konica Corporation

Konica-minolta Holdings, Inc.

Ricoh Company, Ltd.

Konica Minolta Technosearch Co., Ltd.

Norio Joichi

Youbao Peng

Yoshiki Katayama

Yoshihito Sasamoto

Takashi Nara

Atsushi Takahashi

Akifumi Isobe

Kazumichi Yamauchi

Hiroyuki Watanabe

Makoto Ui

Fumio Haibara

Katsunori Takahashi

Masayuki Watanabe

Jun Yokobori

Hiroshi Oyama

Akira Okamoto

Satoshi Sakata

Tadashi Matsudaira

Tetsuya Niitsuma

Hideo Yamane

Shinpei Kawasaki

Shinobu Kishi

Toshihiro Hamano

Yoshihiki Katayama

Hiroomi Miyaki

Yuhou Bou

An image forming apparatus includes a voltage application unit, a target device, a voltage application line, and an electric-current return line. The voltage application unit applies a voltage to the target device through the voltage application line made of a conductor. The electric-current return line made of a conductor connects the target device to the voltage application unit. An electric current that flows upon application of the voltage from the voltage application unit to the target device returns to the voltage application unit through the electric-current return line. The electric-current return line has a length shorter than a path by way of the casing of the image forming apparatus.

Image forming apparatus including voltage and current application lines

An image forming apparatus includes a photoreceptor member; a LED head that includes a plurality of light emitting diodes arrayed in a line along a rotating axial direction of said photoreceptor member and that is modulated in response to image signals, so as to expose said photoreceptor member while said photoreceptor member is rotating; a deviation detecting sensor to detect deviations on a circumferential surface of said photoreceptor member; a filter to extract low frequency components including a rotational frequency component of said photoreceptor member from deviation signals detected by said deviation detecting sensor, so as to acquire deviation information with respect to said circumferential surface of said photoreceptor member; a driving section to move said LED head back and forth against said circumferential surface of said photoreceptor member; and a position controlling section to control said driving section, based on said deviation information acquired by said filter, so as to keep a distance between said LED head and said circumferential surface of said photoreceptor member constant.

Image forming apparatus

An image reading apparatus for reading a document image includes: a document feeding tray for placing the document thereon; a first document reading position for reading the first face of the document ejected and conveyed each from the document feeding tray; a document reverse tray for storing the document so that the document having passed through the first document reading position is reversed and conveyed; a stationary document reading position wherein the document having passed through the document reverse tray and having been reversed and conveyed is conveyed to a platen and the stationary document is read; and an image reading unit for reading the document image. The image reading unit stops at the first document reading position to read the first face of the document, and performs scanning movement at the stationary document reading position to read the second face of the document.

Image forming apparatus and reading method of two-sided document

Image forming apparatus with LED head

An image forming apparatus for performing thermal fixing of toner images, including a fixing section, a heating section, a power supply section and a control section. The control section controls the power supplying section to start supplying electric power to the heating section, and the control section controls the power supplying section to stop supplying electric power to the heating section after a lapse of a predetermined time interval, based on a thermal response characteristic of a temperature detecting section, even when the temperature of the heating section has not yet reached a target fixing temperature.

Temperature control of a fixing roller in an image forming apparatus

An image forming apparatus of the present invention may comprises a power supply system which supplies powers to an image forming unit, a fixing unit, and a general control unit in such a manner that as much power as possible can be supplied to the fixing unit within a limit of a current supplied from an alternating-current power supply, before load fluctuation on a secondary side of a direct-current power supply influences a primary side.

Image forming apparatus with power supply system

An image forming apparatus is disclosed having a fixing unit having a heating device, for heat fixing, a heating power supply section which is connected to the fixing unit to supply electric power supplied from a commercial power supply to the heating device, a voltage detecting section for detecting a value of voltage supplied to the heating power supply section from the commercial power supply, and a control section that stops a supply of electric power to the heating device from the heating power supply section if a first voltage value is smaller than a standard voltage value, while, compares a second voltage value detected by the voltage detecting section after the lapse of the standard time with the standard voltage value, and conducts control to stop operations for image forming if the second voltage value is smaller than the standard voltage value.

Information forming apparatus equipped with a fixing unit

A push button includes a button main body portion which is provided between a packaging substrate placed under it and a casing portion located above it, a light source placed on the packaging substrate, and a light-guide portion which guides light from the light source to an outer periphery of the button main body portion by reflection.

Push button

There is described an image forming apparatus, in which the influence of the overall controlling section startup time is reduced, thereby cutting down the time from turning on of power to enabling of image formation. The image forming apparatus includes: a main power switch to turn ON/OFF an AC power source to be supplied into the image forming apparatus; a DC power current generating section to convert AC power current, fed from the AC power source, to DC power current; an overall-controlling section to control overall operations of the image forming apparatus; an engine-controlling section to conduct a predetermined controlling operation among from controlling operations to be conducted in the image forming apparatus; a first power-controlling section, included in the overall-controlling section and/or controlled by the overall-controlling section; and a second power-controlling section, having a starting time shorter than that of the first power-controlling section.

An image forming apparatus has a sheet feeding section for conveying a sheet for image formation, a stepping motor for driving the sheet feeding section, and a controller for controlling operation of the stepping motor. The controller includes a current value setting section. The current value setting section sets a current value that actuates the stepping motor based on sheet information obtained through at least one section selected from a thickness detecting section, size detecting section, and paper quality detecting section. The thickness detecting section detects a thickness of the sheet. The size detecting section detects a size of the sheet. The paper quality detecting section detects a paper quality of the sheet.

Controller for controlling the current supplied to a motor of an image forming apparatus

In a fixing device of an image forming apparatus including a heating roller and a temperature detecting device spaced apart from the roller, having a first sensor for detecting the surface temperature of the roller, and a second sensor for detecting the ambient temperature, the first sensor being placed at a first position in a casing having an opening through which the heat radiation of the roller is directly incident and the second sensor being enclosed by the casing and placed at a second position to which the heat radiation of the roller is not directly incident, the temperature is calculated on the basis of the outputs of the two sensors, and the opening is disposed so as not to enter a region between the vertical plane containing the central axis of the roller and a tangential plane to the circumferential surface of the roller parallel to the vertical plane.

Fixing device for use in image forming apparatus

This invention is directed to an image printing apparatus having a fixing control section which controls a fixing unit for fixing a toner image on a paper sheet by applying pressure and heat. The image printing apparatus of this invention includes, in the fixing control section, an interface which can receive data from an external data input device so as to shorten the warmup time of the fixing unit and perform direct instructing operation from the data input device to the fixing-unit.

Image printing apparatus including a separate fixing unit control section

There is described an operation panel, which is detachably or movably mounted onto an image-forming apparatus, and which includes a data-inputting section to input operational data necessary for operating the image-forming apparatus and/or a displaying section to display status information of the image-forming apparatus. The operation panel comprises: a circuit board, on which electronic parts are mounted; a supporting member to support the circuit board, the data-inputting section and/or the displaying section, so as to integrate them into a single unit serving as the operation panel; a signal line, through which electronic signals are communicated between the operation panel and the image-forming section; and a conductive member for directly grounding at least one of the data-inputting section, the displaying section and the circuit board to a conductive main-frame of the image-forming apparatus. The signal line and the conductive member are disposed at separate positions being different relative to each other.

Operation panel utilized for image-forming apparatus and image-forming apparatus

The invention concerns an image forming apparatus provided with an automatic writing-position determining device for forming an image always at a correct position on the recording material. The image forming apparatus includes an image forming section to form an image by writing each of scanning lines, an end position detecting section to detect an end position of a recording material in a direction orthogonal to a conveyance direction of the recording material, and a selecting section to select either an automatic writing-position determining mode or a predetermined writing-position determining mode. When the selecting section selects the automatic writing-position determining mode, the image forming section commences an image writing action from a writing start position determined on the basis of a detected result of the end position detecting device. When the selecting section selects the predetermined writing-position determining mode, the image forming section commences the image writing action from a predetermined writing start position set in advance.

An image forming apparatus includes: a writing device for writing an image on the basis of image data thereof; a controller for controlling a writing position in a primary scanning direction by the writing device; a conveying device for conveying a recording material; and a position detecting sensor for detecting an edge of the recording material, which is conveyed by the conveying device in the primary scanning direction as an absolute position. The controller determines the writing position in the primary scanning direction by the writing device on the basis of a position of the edge of the recording material in the primary scanning direction detected by the position detecting sensor, and controls the writing position of the writing device in the primary scanning direction.

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Kokubunji, Japan

Norio Joichi