Canon Kabushiki Kaisha

Fumihiro Ueno

Eihiro Sakaki

Akira Torisawa

Yasuo Ito

Masaki Ohtake

Takao Aoki

Toshiaki Miyashiro

Kaoru Seto

Atsushi Kashihara

Eiichiro Teshima

Shinkichi Takahashi

Hiromi Kataoka

Tetsuya Kobayashi

Hiroshi Mano

Hiroshi Sasame

Takashi Kawana

Yujiro Ando

Tomoyuki Okada

Motoi Katoh

Yoshimi Ogasawara

Hidekazu Tominaga

Tomohiro Hashimoto

Hiroshi Shiba

An image forming apparatus includes an image forming unit, a stacking unit, a first detection unit, a second detection unit, and a control unit. The image forming unit forms an image on a recording medium. The stacking unit stacks recording media on which images are formed. The first detection unit detects a conveyance interval between a trailing edge of a first recording medium and a leading edge of a second recording medium conveyed subsequent to the first recording medium conveyance. The second detection unit is disposed downstream of the first detection unit and detects the conveyance interval and detects whether an amount of recording media stacked on the stacking unit exceeds a predetermined amount. The control unit changes, according to a result of comparing detected conveyance intervals, conveyance timing of the second recording medium to widen the conveyance interval detected by the first detection unit.

Image forming apparatus

In an imaging apparatus, call information is added to a picked-up image, and stored in a memory, and then image data and the call information are transmitted to a communication apparatus. The call information is about a preset destination or a destination entered after imaging. Upon having received the image data and the call information, the communication apparatus calls out based on the call information, and transmits the image data after connection is established with the destination.

Image apparatus

An image forming apparatus is constructed by a latent image forming unit for forming a latent image onto a photosensitive material, a developer for developing the latent image formed on the photosensitive material, a first detecting unit for detecting whether the photosensitive material or developer has been mounted in the image forming apparatus or not, a second detecting unit, provided for the image forming apparatus, for detecting an open or closed state of a door, and a control unit for selecting a specific item of an initial sequence from items of a plurality of initial sequences on the basis of an output of the first detecting unit when it is detected by the second detecting unit that the door was closed from the open state, thereby allowing the selected item to be executed. The plurality of items of initial sequences are items of initial sequences which are executed when a power source is supplied to the image forming apparatus.

System for performing initialization sequences depending on status of image forming apparatus

An image forming apparatus includes an image bearing member, a container for containing a developer removed from the image bearing member, a detector for detecting an amount of developer removed from the image bearing member and contained in the container, and a failure detector for detecting a failure of the developer amount detector on the basis of the degree of use of the image bearing member and a detection result of the developer amount detector.

Image forming apparatus having means for detecting amount of developer used and means for detecting failure of used developer amount detecting means

A memory is provided in an electrophotographic process cartridge to be mounted on a printer, and an area in the memory is separated into a read-only area and a rewritable area. In this structure, a data error in the memory is checked. If an error in the read-only area is detected, an alarm is displayed and a print operation is prohibited. On the other hand, if an error in the rewritable area is detected, the alarm is displayed and the print operation is permitted.

Image formation system having a memory device located in an

An image forming apparatus includes a scan unit for scanning a light beam modulated based on an image signal in the main scan direction, and a drive unit for rotating an image carrier in the subscan direction of an image. The rotation period of the image carrier is set to be an integer multiple of the scan period in the main scan direction of the light beam by the scan unit.

In a multicolor image forming apparatus constructed of a printer controller and a printer engine, such as a laser beam printer, and the like, after confirming the reception of a proper ID command from the printer controller, the printer engine enters a printable state. Before the ID of the printer controller is checked, by checking an attachment situation of the printer controller at the time of turning on of a power supply, and the like, the attachment situation of the printer controller is discriminated. When the printer engine is not attached, the ID check is skipped and only an engine test print by an engine test print switch is enabled.

Image forming apparatus and method utilizing an attachment situation of

In a printer having a toner cartridge drum in which a toner cartridge of each of yellow, magenta, cyan, and black is detachably provided, when the toner cartridge is exchanged by opening a door of the printer and, further, opening a cartridge door, in case of opening and subsequently closing the toner cartridge door, a cartridge change mode is set, and in case of closing the door of the printer, an initial operation of the printer is not immediately performed but the cartridge drum is driven and the cartridge to be exchanged is moved to a taking-out position. When the cartridge change mode is not set, in case of closing the door of the printer, the initial operation of the printer is executed.

Image forming apparatus capable of loading cartridge

An image processing apparatus includes a first delay generation circuit, requiring no high-frequency clocks, for obtaining a pixel formation start timing signal from a digital input signal, a second delay generation circuit, requiring no high-frequency clocks, for obtaining a pixel formation end timing signal from the digital input signal, and a unit for obtaining a pixel formation interval signal from the pixel formation start and end timing signals.

Image forming apparatus with a digital modulator

An image forming apparatus forms a patch image on a recording medium, irradiates the patch image formed on the recording medium with light, and detects a quantity of light reflected by the patch image and outputs a first detection signal. The apparatus detects a quantity of light emitted by a light emission source and outputs a second detection signal, and amplifies the first detection signal in accordance with a first amplification gain and outputs a first amplified signal. The apparatus amplifies the second detection signal in accordance with a second amplification gain and outputs a second amplified signal, and controls image forming conditions based on the first amplified signal or the second amplified signal. An adjustment mode is executed prior to controlling the image forming conditions, and the first amplification gain is controlled when the patch image is formed with black toner, and the second amplification gain is controlled when the patch image is formed with color toner.

Image density detection adjustment device

This disclosure relates to an image forming and processing apparatus having a plurality of storage device capable of forming an image at a high speed by reading image data in parallel. Since a predetermined quantity of image data is stored in a plurality of hard discs, and the image data is read from the hard discs to a double buffer in parallel, an image can be formed continuously at a high speed. Another structure is arranged in a manner such that images are stored in hard discs of an optional number and the images are transmitted to a printer engine by using a FIFO (First In First Out) buffer which corresponds to the hard discs. Therefore, an image can be transmitted continuously at a high speed asynchronously with the printer output.

High-speed image processing using parallel storage

This disclosure relates to an image forming and processing apparatus having a plurality of storage devices capable of forming an image at a high speed by reading image data in parallel. Since a predetermined quantity of image data is stored in a plurality of hard discs, and the image data is read from the hard discs to a double buffer in parallel, an image can be formed continuously at a high speed. Another structure is arranged in a manner such that images are stored in hard discs of an optional number and the images are transmitted to a printer engine by using a FIFO (First In First Out) buffer which corresponds to the hard discs. Therefore, an image can be transmitted continuously at a high speed asynchronously with the printer output.

Image processing method and apparatus

An image forming apparatus for forming an image on a recording medium has an image forming device for forming an image on the recording medium, a conveyance path for conveying the recording medium so that an image is formed by the image forming device, a first casing having a portion of the conveyance path, a second casing having a portion of the conveyance path and being openable relative to the first casing, and a third casing having a portion of the conveyance path and being openable relative to the second casing. The relatively openable casings, each having a portion of the conveyance path, provide an image forming apparatus in which a jam can be dealt with easily.

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Yokohama, Japan

Fumihiro Ueno