Canon Kabushiki Kaisha

Tsuneki Inuzuka

Hisashi Sakamaki

Yutaka Komiya

Masato Ishida

Kenji Kurita

Katsuyoshi Maeshima

Masahiro Tomosada

Hiroshi Nitanda

Koichi Murakami

Yoshihiro Kawatsura

Shigehiro Komori

Katsumi Murakami

Koichi Miyamoto

Hiroyuki Hattori

Toshiaki Yagasaki

Hirotoshi Kishi

Hajime Katayama

Noriyoshi Iida

Tateki Nagaoka

Hiromitsu Hirabayashi

Hiroshi Tanioka

Katsushi Furuichi

Yoshimasa Kimura

Kouki Kuroda

Yusaku Takada

Akitoshi Yamada

Kiichiro Takahashi

Osamu Iwasaki

Naoji Otsuka

Kentaro Yano

Koji Suzuki

Takashi Saito

Fumihiro Gotoh

Toshio Honma

Kazutoshi Shimada

Mitsuhiro Tokuhara

Kimiaki Hayakawa

Masao Hosaka

Yoji Ara

Haruhisa Honda

Koki Kuroda

Osamu Sawamura

Yousaku Takada

Sakamaki Hisahi

A shuttle type recording apparatus having a plural recording heads spaced apart on a common carriage that is mounted to scan over an entire recording area for recording, respectively, in each of plural divided recording areas of the entire recording area. A rail element is mounted on the carriage and extends along the direction of scanning. A drive element is arranged to drive the carriage via the rail element, and a connection portion for transferring driving forces from the drive element to the rail element is provided in the region of the central part of the recording area.

Recording apparatus with plural heads

An ink jet recording apparatus for ejecting ink to effect recording on a recording material includes a carriage movable in a direction different from a direction in which the recording material is fed; and a pressing mechanism for pressing an end of an ink container for containing ink to be supplied to an ink jet recording head, wherein the pressing mechanism is effective to mount on the carriage the ink container and the ink jet recording head which are connected with each other by a connecting mechanism.

Ink jet recording apparatus and carriage mechanism therefor

An image processing controller comprising a pulse control signal generator for controlling a load. A memory is provided for storing parameters, such as the period and duty factor of the pulse control signal. The parameters are transferred from the memory to the pulse control signal generator. The pulse control signal generator generates a pulse control signal having a predetermined pulse width at a predetermined period, in accordance with the parameters.

Pulse width modulation input/output controller for image processing

An image processing apparatus including an image processing unit, computer controller with a memory for storing a program for controlling the processing unit, clock pulse generator for executing the stored computer control program and a divider for dividing the generated clock pulses. The computer controller also receives and counts the clock pulses divided by the divider and controls the processing sequence in accordance with the count.

Image forming process control method and apparatus

An image forming apparatus includes an image forming unit for forming an image on a recording medium, a command unit for commanding image forming conditions, a first switch for connecting a power source to the apparatus, a first director for detecting an operational position of the first switch, a second switch for enabling the first switch to connect the power source to the apparatus, a second detector for detecting an operational position of the second switch, and a memory having microprograms stored therein for operatively controlling loads on the image forming unit. The operation of the image forming unit is controlled by signals derived from the first and second detectors and the microprograms.

Image forming apparatus

An image forming apparatus for forming an image on a recording material. The apparatus includes a control mechanism for controlling the forming of images, or the cessation thereof, in response to signals from several detectors. The detectors detect an improper state of operation of the apparatus, such as the jamming of recording material or the absence of recording material in the apparatus. Also provided is a mechanism for permitting the apparatus to operate despite the occurrence of the improper state, which permits testing of the apparatus.

This invention relates to a copying apparatus with variable magnification capability, wherein the reduced and enlarged copying operations are achieved by varying the speed of a photosensitive drum, while controlling an optical system. The size of a copying material is compared with the size of a reproduced image at a selected magnification, and the comparison is displayed. Also, the size of copy material and the selected magnification can be changed during an interrupt process, and the scanning stroke and timing for image formation are controlled differently for different magnifications. The size of a copying material is compared with the size of a reproduced image at a selected magnification, and the comparison is displayed. Also, the size of copy material and the selected magnification can be changed during an interrupt process, and the scanning stroke and timing for image formation are controlled differently for different magnifications. the optical system is moved to a determined position for a selected magnification and an error signal is generated when the optical system does not arrive at the determined position within a predetermined time after the selected magnification is input by the operator. The image forming cycle is stopped or inhibited in response to generation of the error signal.

Variable magnification copying apparatus and automatic shutdown therefor

A control apparatus including a plurality of loads for processing, a controller for controlling operation of the loads, the controller including a first memory having a microprogram stored therein to operate the loads sequentially, a second memory for storing data to be used during control of the loads, means for repeatedly generating a pulse during execution of the microprogram, and an output port for outputting the pulse. The controller is operable to output the pulse repeatedly from the output port during intervals of normal execution of the microprogram. An initializer is further provided to detect the pulse outputted from the output port, and for designating the controller as abnormal if the pulse from the output port is not detected within a predetermined period of time. To prevent the apparatus from operating erroneously, the controller initiates execution of its microprogram in response to initialization by the initializer and clears the data stored in its second memory. If the initializer does not again detect the pulse after it has initialized the controller, the initializer again initializes the control means, thereby repeatedly initializing the controller at a predetermined time interval.

An image processing apparatus including a plurality of process devices for processing an image. A first control device is provided for controlling at least a first one of the plural process devices in accordance with a control program for an image process, and a second control device is provided for controlling at least a second one of the plural process devices in accordance with the control program. Furthermore, a reset device is provided for detecting a failure of the first and second control device in accordance with an output from one of the two control devices and for resetting both of those two devices.

Copying apparatus

A service life indicator for an image forming process cartridge which contains a consumable used for image formation and is detachably mountable into a main assembly for the image formation, comprises a switching device, adapted to be provided in the process cartridge, actuatable in response to consumption of the consumable, and a warning device, responsive to the switching device, for warning an operator of when the service life of the process cartridge has been consumed.

Service life indicator for a process cartridge

An image scanning apparatus has a reciprocating member for scanning a document, a first motor for driving the reciprocating member, a first detection circuit for detecting the speed of the first motor, a first control circuit associated with the detection circuit for rotating the motor at a speed to scan the document at a speed determined by a magnification factor, a recording medium, a second motor for driving the recording medium, a second detection circuit for detecting the speed of the second motor and a second control circuit associated with the second detection circuit for rotating the second motor at a speed determined by the magnification factor.

Image scanning apparatus

A temperature control apparatus for controlling, e.g., a fixing heater of a copying machine has a fuse resistor connected to the fixing heater through a power relay, a thermistor for detecting the surface temperature of a fixing roller heated by the fixing heater, abnormality timers for counting the ON time of the fixing heater and having different preset counts corresponding to different modes of the copying machine, and a control circuit for disconnecting the fuse resistor when the output from the thermistor indicates overheating or the ON time of the heater exceeds the preset count of the timer. Overheating of the heater is prevented with high reliability.

Temperature control apparatus for detecting an abnormality in a heater

An image forming apparatus includes an image forming unit for forming an image on a recording medium, a command unit for commanding image forming conditions, a first switch for connecting a power source to the apparatus, a first detector for detecting an operational position of the first switch, a second switch for enabling the first switch to connect the power source to the apparatus, a second detector for detecting an operational position of the second switch, and a memory having microprograms stored therein for operatively controlling loads on the image forming unit. The operation of the image forming unit is controlled by signals derived from the first and second detectors and the microprograms. Information can be entered via a keyboard during waiting time.

Image forming apparatus with function permitting key entry during

An image formation apparatus has a first feeder for feeding a copy sheet from a container containing a number of copy sheets therein, a second feeder for feeding a copy sheet supplied manually thereto. Both feeders feed the copy sheet to an image formation station, and a scanner exposure-scans an original image to form a copy image, a first detector detects the size of manually supplied copy sheets and a second detector detects the size of the copy sheets in the container, a controller controls the movement of the scanner in accordance with detection by the first and second detectors, so that the scanning stroke length of the scanner is coordinated for the size of the copy sheet manually supplied to the image formation station and supplied from the container.

Image formation apparatus including means for manually and automatically

A copy board apparatus for copying information on a web-like writing board supported by rollers with an electrophotographic copier disposed adjacent one longitudinal end of the writing board. The apparatus has a first optical system for optically connecting the writing board and a photosensitive member of the copier, a second optical system for optically connecting an original on the copier and the photosensitive member, and change-over circuitry which permits switching between the two optical systems.

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Machida, Japan

Tsuneki Inuzuka