Patents by Inventor Toshiaki Yagasaki
Toshiaki Yagasaki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 4878130Abstract: A reproduction apparatus has a reader for reading an original image by photoelectric conversion and a character generator in which image information from said reader and image information from said character generator are synthesized.Type: GrantFiled: March 6, 1989Date of Patent: October 31, 1989Assignee: Canon Kabushiki KaishaInventors: Katsuichi Shimizu, Shunichi Masuda, Toshiaki Yagasaki, Hisashi Sakamaki
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Patent number: 4855648Abstract: A digital device for controlling the power supply to various loads, by converting the state of the loads or the peak value of the power supply voltage into digital values and instantly determining the power supply to the loads.Type: GrantFiled: July 16, 1987Date of Patent: August 8, 1989Assignee: Canon Kabushiki KaishaInventor: Toshiaki Yagasaki
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Patent number: 4823192Abstract: There is disclosed a reproduction apparatus having image information generator, image processor for image formation, controllor for controlling the function of said image information generator and image processor, and a bus line for common use for the transport of image information between said image information generator and said image processor and for the transport of instructions from said controllor.Type: GrantFiled: December 29, 1986Date of Patent: April 18, 1989Assignee: Canon Kabushiki KaishaInventors: Katsuichi Shimizu, Shunichi Masuda, Toshiaki Yagasaki, Hisashi Sakamaki
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Patent number: 4811051Abstract: A printing or copying apparatus of a type provided with a recording medium, operable device for forming an image on the recording medium, device for operating a first signal required for the timing operation of the operable device, keys for instructing to start or stop the execution of image formation, first control device controlling the operable device in accordance with the first signal, and which comprises a memory for storing a program for operation control of the operable device for image formation, and second control device for controlling the first control device in accordance with the key instructing device for controlling the execution of image formation and for controlling at least one of the operable devices, and which comprises a memory for storing a program for operation control of the first control device.Type: GrantFiled: May 19, 1982Date of Patent: March 7, 1989Assignee: Canon Kabushiki KaishaInventors: Shunichi Masuda, Katsuichi Shimizu, Toshiaki Yagasaki, Hisashi Sakamaki
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Patent number: 4771313Abstract: 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.Type: GrantFiled: September 19, 1983Date of Patent: September 13, 1988Assignee: Canon Kabushiki KaishaInventors: Koki Kuroda, Tsuneki Inuzuka, Toshiaki Yagasaki
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Patent number: 4763162Abstract: An image forming apparatus has a container for accommodating recording sheets, an image forming station for forming images on the sheets fed from the container, a detection unit for detecting multi-feed of the sheets fed from the container, a separation unit for separating the multi-fed sheets one from others, and a controller responsive to the detection of the multi-feed by the detection unit for controlling the image forming station to form the image on the first one of the multi-fed sheets which was separated and fed to the image forming station and to form no image on the other ones of the multi-fed sheets.Type: GrantFiled: November 12, 1985Date of Patent: August 9, 1988Assignee: Canon Kabushiki KaishaInventor: Toshiaki Yagasaki
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Patent number: 4740671Abstract: 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.Type: GrantFiled: October 30, 1986Date of Patent: April 26, 1988Assignee: Canon Kabushiki KaishaInventors: Kouki Kuroda, Toshiaki Yagasaki, Tsuneki Inuzuka
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Patent number: 4714940Abstract: An image processing apparatus which has a function of simultaneously or selectively copy an image displayed on a display screen and an image on an original at an arbitrary location is disclosed. This apparatus includes a display unit which can be used as an original and be simultaneously used with the original and further can display at an arbitrary location on a placing unit for placing the original.Type: GrantFiled: August 9, 1984Date of Patent: December 22, 1987Assignee: Canon Kabushiki KaishaInventors: Yutaka Inoue, Mitsuru Kurata, Nobuhiro Kasama, Masao Hosaka, Toshiaki Yagasaki, Hiroshi Tanioka, Tadashi Yamakawa
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Patent number: 4669862Abstract: An image forming apparatus comprises a rotating drum, a plurality of processing means including means for charging and discharging the rotating drum, a pulse generator for controlling timing of at least one of the processing means and means for starting the charging and discharging means after having checked a normal condition of the rotating drum when a start of image formation instruction has been issued.Type: GrantFiled: March 18, 1985Date of Patent: June 2, 1987Assignee: Canon Kabushiki KaishaInventors: Toshiaki Yagasaki, Shunichi Masuda, Yukio Sato
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Patent number: 4656338Abstract: A recording apparatus in which a control unit utilizes a copy counter for plural purposes. The control unit also achieves other features such as securer jam detection, a constant operation regardless of the frequency of commercial power supply, securer timing and temperature control with limited number of sensors.Type: GrantFiled: August 18, 1983Date of Patent: April 7, 1987Assignee: Canon Kabushiki KaishaInventors: Toshiaki Yagasaki, Kouki Kuroda, Tsuneki Inuzuka
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Patent number: 4646249Abstract: There is disclosed an image processing system, particularly, for use in a copying machine with a display. This apparatus comprises a liquid crystal display panel on an original presser plate; a panel copy mode to perform the image processing with respect to the screen display; an ordinary copy mode to perform the image processing with respect to an ordinary original; a high gradient processor to perform the image processing of high gradient; a low gradient processor to perform the image processing of low gradient; and a switching circuit to switch the high gradient processor and low gradient processor in accordance with the panel copy mode and ordinary copy mode. The image processings with different gradients can be executed depending upon the states and kinds of originals, so that an appropriate copy of the display panel or ordinary original can be always provided.Type: GrantFiled: June 11, 1984Date of Patent: February 24, 1987Assignee: Canon Kabushiki KaishaInventors: Hiroshi Tanioka, Tadashi Yamakawa, Yutaka Inoue, Masao Hosaka, Toshiaki Yagasaki, Nobuhiro Kasama, Mitsuru Kurata
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Patent number: 4638368Abstract: A reproduction apparatus has a reader for reading an original image by photoelectric conversion and a character generator in which image information from said reader and image information from said character generator are synthesized.Type: GrantFiled: September 21, 1984Date of Patent: January 20, 1987Assignee: Canon Kabushiki KaishaInventors: Katsuichi Shimizu, Shunichi Masuda, Toshiaki Yagasaki, Hisashi Sakamaki
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Patent number: 4603245Abstract: A temperature control apparatus for a copying machine has a halogen heater for heating a fixing roller, a thermistor for detecting the surface temperature of the fixing roller, and a microcomputer for performing ON/OFF control of the halogen heater in accordance with an output from the thermistor. After the heater is turned on or off, the heater is kept in the ON or OFF state for a predetermined period time irrespective of the output from the thermistor. A waiting time before using the copying machine after the power is turned on is shortened without requiring a heater having a high output power. Erratic operation due to noise generated upon turning on or off of the heater is prevented.Type: GrantFiled: August 18, 1983Date of Patent: July 29, 1986Assignee: Canon Kabushiki KaishaInventor: Toshiaki Yagasaki
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Patent number: 4602867Abstract: There is disclosed a copying apparatus which enables obtainment of copy images different in size from original document images. Particularly, there is disclosed an improved variable magnification copying apparatus having multiple sheet feeding portions.Type: GrantFiled: September 16, 1985Date of Patent: July 29, 1986Assignee: Canon Kabushiki KaishaInventors: Katsuichi Shimizu, Shunichi Masuda, Toshiaki Yagasaki
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Patent number: 4582417Abstract: An image-forming apparatus is disclosed which is able to form an image while blanking any unnecessary image portion or extracting any desired image portion at one's will. To this end, the apparatus includes a plurality of light exposing means, an image area setting means and control means. Said control means selectively renders said individual light exposing means operative or inoperative according to the selected image area by said image area setting means.Type: GrantFiled: July 8, 1982Date of Patent: April 15, 1986Assignee: Canon Kabushiki KaishaInventors: Toshiaki Yagasaki, Shunichi Masuda, Yukio Sato
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Patent number: 4571053Abstract: An image forming apparatus comprises a light source, a photosensitive member adopted to be illuminated by a light from the light source, a liquid crystal for controlling illumination and non-illumination of the light to the photosensitive member to form an image on the photosensitive member, a detector for detecting an image reproduction ability of the photosensitive member to set an image forming condition on the photosensitive member, and setting means for setting the liquid crystal to a predetermined state to allow the detection by the detector.Type: GrantFiled: September 18, 1984Date of Patent: February 18, 1986Assignee: Canon Kabushiki KaishaInventors: Nobuhiro Kasama, Mitsuru Kurata, Hiroshi Tanioka, Tadashi Yamakawa, Yutaka Inoue, Masao Hosaka, Toshiaki Yagasaki
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Patent number: 4530593Abstract: An image forming apparatus and attachment capable of displaying an indication that the device has been instructed to process a number of images that exceeds the processing capacity of the attachment. The displayed indication is in the form of a numeral indicating the processing capacity of the attachment.Type: GrantFiled: April 6, 1984Date of Patent: July 23, 1985Assignee: Canon Kabushiki KaishaInventors: Yukio Kasuya, Toshiaki Yagasaki, Shunichi Masuda
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Patent number: 4530063Abstract: A printing or copying apparatus of a type provided with a recording medium, operable device for forming an image on the recording medium, device for operating a first signal required for the timing operation of the operable device, keys for instructing to start or stop the execution of image formation, first control device controlling the operable device in accordance with the first signal, and which comprises a memory for storing a program for operation control of the operable device for image formation, and second control device for controlling the first control device in accordance with the key instructing device for controlling the execution of image formation and for controlling at least one of the operable devices, and which comprises a memory for storing a program for operation control of the first control device.Type: GrantFiled: August 9, 1982Date of Patent: July 16, 1985Assignee: Canon Kabushiki KaishaInventors: Shunichi Masuda, Katsuichi Shimizu, Toshiaki Yagasaki, Hisashi Sakamaki
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Patent number: 4515458Abstract: In an image forming apparatus including a copying machine having a sorter connected thereto, the copying machine is operated in selected one of book mode or sheet mode while the sorter is operated in selected one of sorter mode and collator mode. When the sheet mode is selected for the copying machine, a control unit selects the collator mode for the sorter, and when the book mode is selected for the copying operation, the control unit selects the sorter mode for the sorter. The copying machine monitors energization status of the sorter and if the sorter is deenergized, copy papers ejected from the copying machine are prevented from being fed to the sorter.Type: GrantFiled: May 11, 1982Date of Patent: May 7, 1985Assignee: Canon Kabushiki KaishaInventors: Shunichi Masuda, Toshiaki Yagasaki, Yukio Kasuya
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Patent number: 4350436Abstract: A feed control device includes a feeder for feeding sheet from copy mediums to a predetermined position, a device for forming an image on or from a copy medium fed by the feeder, and a controller for controlling the driving of the feeder with the copy medium being present at the feeder in order to complete the feed of the copy medium by the inertia force of the feeder.Type: GrantFiled: May 20, 1980Date of Patent: September 21, 1982Assignee: Canon Kabushiki KaishaInventors: Toshiaki Yagasaki, Shunichi Masuda, Katsuichi Shimizu, Hisashi Sakamaki