Canon Kabushiki Kaisha

Yushi Oka

Toshiyuki Miyake

Naoto Watanabe

Takayuki Fujii

Takashi Yokoya

Shunsuke Nishimura

Manabu Yamauchi

Shinichi Takata

Hidenori Matsumoto

Hiroshi Matsumoto

Kentaro Tamura

Ryou Sakaguchi

Satoru Yamamoto

Akihiko Sato

Toru Ono

Shigemichi Hamano

Kaoru Hamada

Masato Furukawa

Takayuki Kawakami

Yoshitaka Yamazaki

Akihito Mori

Naoto Yamada

Hajime Motoyama

Hajime Kaji

Junichi Noguchi

Seiji Shibaki

Satoshi Ogawara

Kenji Morita

Mitsuhiko Sato

Yutaka Ando

Hiromasa Maenishi

Yasuo Fukatsu

Takashi Sugiura

Toshifumi Kakutani

Naohisa Nagata

Asahiro Nakayoshi

Masayoshi Taira

Fumitaka Sobue

Hideyuki Nagata

Takao Nakajima

Daisuke Aruga

Yuzo Matsumoto

Takuya Kawamura

Akiko Kanno

Shinsuke Ubayashi

Kazunori Togashi

Yuichiro Maeda

Kazuyuki Iwamoto

Kenji Kuroki

Ryo Mikami

Katsumi Takahashi

Hiromichi Koseki

Fumika Nakajima

Shinichi Ikoma

An image scanning apparatus includes a sheet loading unit, a pickup roller, a first conveying roller, a detecting unit, a first stepping motor, a second conveying roller, a second stepping motor, a scanning unit, and a control unit that starts driving of the second stepping motor after performing phase matching of the second stepping motor. The control unit starts driving of the first stepping motor without performing phase matching of the first stepping motor. When an instruction to start scanning is input, the control unit starts the phase matching of the second stepping motor. When the detecting unit detects the document, the control unit starts driving of the first stepping motor after completion of the phase matching of the second stepping motor. When the detecting unit detects no document, the control unit starts driving of the first stepping motor before completion of the phase matching of the second stepping motor.

Image scanning apparatus

An image forming apparatus includes an original reading unit; an image forming unit, an image data sending unit; and a mode setting unit for setting one of original reading modes including a first original reading mode for the original reading unit to read originals of the same size, and a second original reading mode for the original reading unit to read originals of different sizes; and a control unit for controlling the original reading unit and the image forming unit so as to execute a copy job including the original reading process and the image forming process, and a sending job including the original reading process and the sending process. The mode setting unit is capable of independently setting, for the copy job and the sending job, a default value indicating the first original reading mode or the second original reading mode.

Image forming apparatus with original reading mode settable independently for a copy operation and a sending operation

An image reading apparatus includes a line image sensor receiving a light reflected from an original illuminated by a light source to generate image data, an original size detector disposed away from an original positioning portion by a predetermined distance in a sub-scanning direction, an original image reading start instructing unit outputting an image reading start instruction for starting an image reading operation when being depressed by a user, and a controller determining a size of the original based on detection results of the line image sensor and the original size detector when the size of the original is not stored in a memory in a case in which the controller receives the image reading start instruction in a state in which it is detected that an angle of a pressure plate is greater than a predetermined angle.

Image reading apparatus

An image forming apparatus temporarily stores, in an image memory, image data generated by a front surface reading unit and a back surface reading unit for reading images of a front surface and a back surface of an original respectively. A CPU of an image forming apparatus, at a time of starting a copy job, sets an output frequency of the image memory (transfer rate of image data) to a first frequency Fthat is lower than a second frequency F. The CPU sets the output frequency of the image memory to the second frequency Fwhen transfer of the image data of the first page which corresponds to the front surface of a first original completes.

Image forming apparatus with two-sided copying and variable image data transfer clock frequency

An image reading apparatus, including: a first distance detector configured to measure a first distance of the original conveyed after a sensor is changed from a first state detecting the original to a second state not detecting the original; a second distance detector configured to measure a second distance of the original conveyed after the second state is changed to the first state; and a controller configured to control a conveyor so that the conveyor starts a conveyance of a succeeding original when the second distance reaches a conveyance permission distance before the first distance reaches a hole detection distance and the conveyor stops the succeeding original when the second state is changed to the first state before the first distance reaches the hole detection distance, and thereafter starts the conveyance of the succeeding original when the first distance reaches the hole detection distance.

Provided is an image reading apparatus for suppressing an image defect ascribable to shading correction using a white reference plate arranged at a position different from a reading position of an original. The image reading apparatus includes a reading unit configured to read an image from the original passing through the reading position, the white reference plate arranged such that a distance between the reading unit and the white reference plate is larger than the distance between the reading unit and the reading position, and a control system. The control system includes a memory for backup configured to store in advance correlation data representing a correlation between a reading result of the white reference plate obtained by the reading unit, and a reading result of a reference member having a uniform density and arranged at the reading position.

Image reading apparatus with shading correction

Provided is an information processing apparatus including: a non-volatile memory; a volatile memory being configured to store first, second and third programs; and a processor configured to: in a first activation processing mode, transfer the first program from the non-volatile memory to the volatile memory; transfer the second program from the non-volatile memory to the volatile memory based on the stored first program; and parallelly perform, first processing based on the stored second program and transfer of the third program from the non-volatile memory to the volatile memory, and in a second activation processing mode, transfer the first program from the non-volatile memory to the volatile memory; transfer the third program from the non-volatile memory to the volatile memory based on the stored first program; and parallelly perform second processing based on the stored third program and transfer of the second program from the non-volatile memory to the volatile memory.

Information processing apparatus and image reading apparatus

An image forming apparatus includes an image reader configured to perform image reading of a first original and perform image reading of a second original after reading of the first original, a printer configured to print a read image read by the image reader on a sheet, and a controller configured to control operation of the image reader and the printer. As to the first original, the controller is configured, in a case where the printer performs double-sided printing to print on both sides of a sheet, to start to print a read image of the first original before the image reading of the first original is completed, and as to the second original, the controller is configured, in a case where the printer performs double-sided printing to print on both sides of a sheet, to start to print a read image of the second original after the image reading of the second original is completed.

Image forming apparatus having double-sided printing and control method of the same

An image reading apparatus reads an original image of an original, which is conveyed along a conveyance path, using a scanner unit and a CCD sensor unit. A separation sensor, a lead sensor, and a sheet discharge sensor, which are provided to the conveyance path, detect occurrence of a jam. A restarting method for reading processing of the original after the occurrence of the jam includes a first restarting method of re-placing all of the originals, which have been fed, on an original tray and a second restarting method of re-placing only an unread original on the original tray, and is set by a user. In a case where the second restarting method is set, the restarting method is determined from any one of the first restarting method and the second restarting method based on a discharged length of the original having been discharged to a sheet discharge tray.

Image reading apparatus and image reading method

In an image forming apparatus, an image forming unit forms a first image of a first color and a second image of a second color. An obtaining unit obtains information related to relative positions of a first measurement image, which is formed on an image carrier, of the first color and a second measurement image, which is formed on an image carrier, of the second color. A generation unit generates correlation data based on first information corresponding to a first image forming speed and second information corresponding to a second image forming speed. A controller, in a case where the image forming unit forms an image at the second image forming speed, corrects relative positions of the first image and the second image based on the first information in advance and the correlation data.

Image forming apparatus that forms color image by superimposing plurality of images in different colors

An image forming apparatus capable of performing color misregistration correction at image forming speeds while reducing downtime. Image forming units form images of different colors. The formed images are transferred to an intermediate transfer belt. A pattern sensor detects color misregistration amounts of color patterns formed on the intermediate transfer belt. A CPU causes the image forming units to form first color patterns at a first speed and the pattern sensor to detect first color misregistration amounts, and causes the former to form second color patterns at a second speed different from the first speed and the latter to detect second color misregistration amounts. The CPU determines third color misregistration amounts at a third speed based on the first and second color misregistration amounts. The third speed is different from the first and second speeds.

Image forming apparatus that corrects color misregistration

An image forming apparatus includes a stacking portion on which a sheet is to be stacked, an image forming unit, a size detection unit, a setting unit, a notification unit, and a control unit. The image forming unit forms an image on a sheet fed from the stacking portion. The size detection unit detects a size of a sheet stacked on the stacking portion. The setting unit sets at least one sheet size to be allowed for use at the image forming apparatus. The notification unit provides notification of information. The control unit causes the notification unit to provide a warning in a case where the size of the sheet detected by the size detection unit is not included in the at least one sheet size set by the setting unit.

Image forming apparatus

An image forming apparatus includes a generation unit configured to generate correlation data indicating a relationship between a relative position of a first image and a second image corresponding to a first speed and a relative position of the first image and the second image corresponding to a second image forming speed; a controller configured to, in a case where a image forming unit forms an image at the second speed, correct a relative position of the first image and the second image based on first information and on correlation data; and a prohibition unit configured to prohibit formation of the measurement image at the second speed in a case where a housing unit does not house a predetermined recording material corresponding to the second speed.

An image forming apparatus includes a unit configured to correct a relative position of a first image and a second image, and a controller configured to form a first measurement image in a case where a first condition is satisfied, and to form the first measurement image and a second measurement image in a case where a second condition is satisfied. The controller is further configured to, in a case where the first condition is satisfied, determine whether or not the second condition is satisfied before the first condition is satisfied next, and in a case where the second condition is satisfied before the first condition is satisfied next, cause an image forming unit to form the first measurement image and the second measurement image.

Image forming apparatus that forms color image by superimposing plurality of images

An image forming apparatus comprising: an image carrier; an image forming unit configured to form a toner image on the image carrier by using toner, based on image information; a transfer unit configured to transfer the toner image formed on the image carrier to a sheet; a cleaning unit configured to clean toner on the image carrier; a collected toner box in which the toner cleaned by the cleaning unit is collected; a rotating member configured to be rotated for moving the toner in the collected toner box; and a controller configured to control, based on the image information, whether or not to rotate the rotating member.

Image forming apparatus with waste toner collection container

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Abiko, Japan

Yushi Oka