Patents by Inventor Toshikazu Matsui
Toshikazu Matsui 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: 5305994Abstract: A sorter includes a sheet processing device, a plurality of bin trays arranged in a vertical direction, each bin tray having a specified width and length and adapted for bearing a sheet, shifting means for shifting the plurality of bin trays in the vertical direction, and moving means for moving the bin tray in a predetermined position in a lengthwise direction of the bin tray so that the sheet on the bin tray is processed by the sheet processing device. The bin tray can be moved to a position where sheet processing is to be applied by the sheet processing device.Type: GrantFiled: July 13, 1992Date of Patent: April 26, 1994Assignee: Mita Industrial Co., Ltd.Inventors: Toshikazu Matsui, Takatoshi Nishimura, Kenichi Honda, Shoichiro Tajima, Keiichi Asano, Hiroyuki Nagai, Nobukazu Ootsuka
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Patent number: 5290020Abstract: An automatic sheet processing device mountable on a sorting unit of an image forming apparatus includes a sheet processor for applying a sheet processing to a sheet having a specified length and width, a moving unit capable of supporting the sheet processor for moving the sheet processor along a side of the sheet, and a controller having a storage unit for storing sheet processing data, a calculator for calculating a processing position from the sheet processing data, and a control portion for controlling the moving unit so as to move the sheet processor to the calculated processing position. The processing position is calculated from the stored sheet processing data, and the sheet processor is moved to the calculated processing position, so that sheet processing can be automatically.Type: GrantFiled: July 13, 1992Date of Patent: March 1, 1994Assignee: Mita Industrial Co., Ltd.Inventors: Toshikazu Matsui, Takatoshi Nishimura, Kenichi Honda, Shoichiro Tajima, Keiichi Asano, Nobukazu Ootsuka, Hiroyuki Nagai, Yoichiro Irie, Tooru Himegi, Yoshio Sugishima
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Patent number: 5253023Abstract: An electrostatographic apparatus has a driving roller, a tension roller, a belt-like recording medium that moves over the roller in an endless track manner, an ion head that forms an electrostatic image on the surface of the recording medium, a development apparatus that develops the electrostatic image to form a toner image, and a heat transfer unit that transfers the toner image onto the recording sheet by Ion-Deposition imaging techniques (or by electrophotographic techniques). The toner remaining on the recording medium is removed by applying a direct-current to the development apparatus.Type: GrantFiled: February 12, 1992Date of Patent: October 12, 1993Assignee: Kabushiki Kaisha ToshibaInventors: Yasuo Hosaka, Hitoshi Nagato, Yuzo Koike, Toshikazu Matsui, Shuzo Hirahara
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Patent number: 5201503Abstract: A sorter incorporating a stapler sorts and staples sheets discharged from a discharger of an image forming apparatus. The sorter includes a plurality of bins, a stapler, a stacker, and a supplying/discharging mechanism. The plurality of bins are vertically arranged and vertically movable. The stapler staples a stack of sheets stored in each of the bins. The stacker stores the bundles of sheets stapled by the stapler. The supplying/discharging mechanism supplies into the bins of the sorter the sheets discharged from the discharger, and discharges the bundles of sheets stapled by the stapler into the stacker.Type: GrantFiled: October 17, 1991Date of Patent: April 13, 1993Assignee: Mita Industrial Co., Ltd.Inventors: Toshikazu Matsui, Hiromi Sakata, Masanori Itakiyo, Kunihiko Ishikawa, Kenzo Ono
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Patent number: 5175635Abstract: A picture printing apparatus is disclosed which includes a picture type judgement means, and a best mode printing system is determined according to the judging result. A mixed mode picture including a binary picture element and a gradational picture element is printed to utilize selectively the binary method, multivalence concentration pattern method and the dither method.Type: GrantFiled: May 17, 1991Date of Patent: December 29, 1992Assignee: Kabushiki Kaisha ToshibaInventors: Kiyoshi Yamada, Shuzo Hirahara, Toshikazu Matsui, Kazuhiko Higuchi
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Patent number: 5114136Abstract: The present invention relates to a document pusher plate to be used in an image forming equipment in which a document pusher plate which can be freely opened and closed by a hinge mechanism is mounted on a document set plate of the image forming equipment and a document is fed to the position of exposure on the document set plate or delivered from the position of exposure by rotating or reversing document transfer means arranged at the side of a document feeding device in the document pusher plate. This document pusher plate is provided with a reinforcement plate at the side of the document transfer means at the rear side thereof, and one end of the reinforcement plate is linked with the hinge mechanism, thereby causing warping or deflection of the document pusher plate to be prevented, accomplishing low cost of the production and light weight, and causing the document transfer to be accurate and stabilized by means of an automatic document feeding unit.Type: GrantFiled: November 16, 1989Date of Patent: May 19, 1992Assignee: Mita Industrial Co., Ltd.Inventors: Jun Miyoshi, Mitsugu Shibanaka, Toshikazu Matsui, Nobukazu Ohtsuka
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Patent number: 5058874Abstract: An automatic document conveying device for use with an image processing machine having a transparent plate on which to place documents. The device includes an opening-closing frame and a document table. A conveyor roller is rotatably mounted in the opening-closing frame. A document delivery device is provided for delivering sheet-like documents from the document table. The document delivered from the document table is introduced into a required position on the transparent plate by the conveyor roller. The rotation of the conveyor roller in the introducing direction is stopped while the introduced document is still between the conveyor roller and the transparent plate. A guiding device which permits advance of the document from the document table to the transparent plate but hampers movement of the document from the transparent plate toward the document table and defects it upwardly, is provided between the document table and the conveyor roller.Type: GrantFiled: March 14, 1989Date of Patent: October 22, 1991Assignee: Mita Industrial Co. Ltd.Inventors: Jun Miyoshi, Hiroyuki Nagai, Mitsugu Shibanaka, Nobukazu Otsuka, Yasuhiko Kida, Haruo Yamamoto, Toshikazu Matsui
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Patent number: 5016868Abstract: An automatic document transfer device including a document feeding portion mounted at the document feeding section of the main body of the image forming equipment and a portion for transferring documents to the position of exposure on the document table, which is mounted at the document pusher plate attached to the upper portion of the document table of the main body of the image forming equipment. First and second linkage gears which can be mutually engaged to be connected and disconnected together with opening and closing of the document pusher plate whereby a drive force is transmitted from the document feeding portion to the transferring portion by way of the first and the second linkage gears.Type: GrantFiled: November 16, 1989Date of Patent: May 21, 1991Assignee: Mita Industrial Co., Ltd.Inventors: Nobukazu Ohtsuka, Hiroyuki Nagai, Mitsugu Shibanaka, Toshikazu Matsui
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Patent number: 4914349Abstract: A photo electric conversion tube in which a translucent photocathode surface is provided inside of an incident light window. The incident light window is made of glass plate and an optical fiber plate bonded to at least part of the glass plate or just the optical fiber plate on the photocathode surface. The optical fiber plate contains fibers which are inclined at an angle to the photocathode surface.Type: GrantFiled: October 26, 1987Date of Patent: April 3, 1990Assignee: Hamamatsu Photonics Kabushiki KaishaInventors: Toshikazu Matsui, Takeo Sugawara
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Patent number: 4884080Abstract: A color image printing apparatus prints one pixel by superposing a predetermined dots of three colors within a 3.times.3 dot matrix in accordance with a density of the pixel. The positions of the printed dots within the dot matrix are stored as a dot pattern for each color. One dot pattern is used for each of a plurality of densities included in one density range. The printing energy for each of the dots included in the dot pattern is controlled in accordance with the density level of the pixel. The dot pattern is different for each color and three dot patterns are stored for each color and for each density range. These three dot patterns are repeatedly used for every three pixels which are continuous in the horizontal direction. These three dot patterns have two or three texture directions. The texture direction other than the vertical direction is different for each color.Type: GrantFiled: June 2, 1987Date of Patent: November 28, 1989Assignee: Kabushiki Kaisha ToshibaInventors: Shuzo Hirahara, Hitoshi Nagato, Kazuhiko Higuchi, Kiyoshi Yamada, Tadayoshi Ohno, Tsutomu Kanai, Toshikazu Matsui
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Patent number: 4686935Abstract: Disclosed is a development device comprising a development sleeve of a non-magnetic material, a magnet having a plurality of magnetic poles and fixed within the sleeve, a mechanism for rotating the sleeve, a mechanism for agitating a developer composed of a magnetic carrier and a chargeable toner and supplying it to the sleeve, a mechanism for adjusting a magnetic brush formed on the sleeve to a predetermined brush length and supplying it to a development zone, and a mechanism for scraping off the magnetic brush which has gone past the development zone from the sleeve, said magnetic poles consisting of a main pole for development corresponding to the development zone and poles for conveying corresponding to a conveying zone ranging from the position of supplying the developer to the position of cutting the magnetic brush, said magnetic carrier being a ferrite carrier, and each said conveying magnetic pole having a magnetic flux density 50 to 86% of that of the main pole for development.Type: GrantFiled: July 30, 1985Date of Patent: August 18, 1987Assignee: Mita Industrial Co., Ltd.Inventors: Toshikazu Matsui, Akira Fushida, Nobuyasu Honda, Minoru Nakao, Nobuyuki Tsuji
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Patent number: 4652510Abstract: Disclosed is an electrophotographic process which comprises developing an electrophotographic light-sensitive layer having an electrostatic charge image of a certain polarity with a one-component type magnetic developer where positive and negative frictional charge polarities are mingled, under development bias voltage conditions capable of developing the electrostatic charge image, the background or both, and bringing the light-sensitive layer having a developer layer formed thereon into contact with a transfer sheet under a transfer charge of the same polarity as that of the electrostatic charge image when a positive image is formed or under a transfer charge of a polarity reverse to that of the electrostatic charge image when a negative image is formed, to form an image on the transfer sheet.Type: GrantFiled: August 30, 1985Date of Patent: March 24, 1987Assignee: Mita Industrial Co., Ltd.Inventors: Akira Fushida, Toshikazu Matsui, Yuuji Hasegawa, Masahiko Maeda, Nobuyuki Tsuji, Akira Horiuchi, Kazunori Yukitake
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Patent number: 4592041Abstract: A head for recording an information signal in and reproducing the same from a semiconductor recording medium comprises an electrode stylus for recording and reproducing recording information by relatively sliding on the semiconductor recording medium, the recording information being recorded and reproduced through the electrode stylus, and a nonconductive supporting substrate, provided on the side surface of the electrode stylus, for supporting the electrode stylus. A hardness of the electrode stylus is lower than a hardness of a surface medium which constitutes the semiconductor recording medium and is higher than a hardness of the supporting substrate.Type: GrantFiled: November 15, 1983Date of Patent: May 27, 1986Assignee: Tokyo Shibaura Denki Kabushiki KaishaInventors: Shigeo Senzaki, Jun-ichiro Ikeuchi, Toshikazu Matsui, Norikazu Sawazaki
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Patent number: 4576465Abstract: The toner concentration of a two-component type developer including a mixture of a magnetic carrier and an electroscopic toner is adjusted by bringing a magnetic brush of the two-component type developer into sliding contact with a mesh screen to move the electroscopic toner toward the magnetic brush side or the opposite side through apertures of the mesh screen. Apparatus for adjusting the toner concentration in a two-component type developer includes a mechanism for forming a magnetic brush from a mixture of a magnetic carrier and an electroscopic toner and for delivering the magnetic brush. The mechanism includes a support formed of an electroconductive non-magnetic material and a magnet having a plurality of poles and being built in the interior of the support. At least one of the support and magnet is movable.Type: GrantFiled: September 26, 1983Date of Patent: March 18, 1986Assignee: Mita Industrial Co., Ltd.Inventors: Akira Fushida, Yuuji Hasegawa, Toshikazu Matsui
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Patent number: 4540645Abstract: Disclosed is a magnetic brush development method comprising supplying a two-component type developer comprising a mixture of magnetic carrier particles with toner particles chargeable by friction with the magnetic carrier particles onto a developing sleeve consisting of a non-magnetic sleeve having a magnet installed therein to form a magnetic brush of the developer, and bringing the magnetic brush in sliding contact with the surface of a photosensitive material having an electrostatic latent image formed thereon in the state where a bias voltage is applied between the photosensitive material and the sleeve, whereby a toner image corresponding to the electrostatic latent image is formed, wherein the two-component type developer comprises a ferrite carrier and electroscopic toner particles at a weight ratio of from 4/1 to 20/1.Type: GrantFiled: January 27, 1984Date of Patent: September 10, 1985Assignee: Mita Industrial Co LtdInventors: Nobuyasu Honda, Toshikazu Matsui, Akira Fushida, Toshimitsu Ikeda, Kenji Takahashi, Hideo Fukuda, Yasushi Kamezaki, Takashi Teshima
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Patent number: 4440488Abstract: A cleaning device for an image-carrying member includes an elastic blade having a proximal end fixed to a holder and a terminal end held against the image-carrying member for removing toner from the image-carrying member upon movement of the image-carrying member. The terminal end of the blade flexes to extend forward in the direction of movement of the image-carrying member at an angle of .alpha. to a line tangential to a surface of the image carrying member rearward of a contact point between the terminal end of the blade and the image carrying member with respect to the direction of movement thereof. The blade has an axis passing through the proximal end of the blade and extending at an angle of .theta. to the tangent rearward of the contact point with respect to the direction of movement of the image-carrying member. The angles .alpha. and .theta. are selected to meet the following relationship:.theta.>90.degree.>.alpha..Type: GrantFiled: August 25, 1982Date of Patent: April 3, 1984Assignee: Mita Industrial Company LimitedInventors: Takashi Maekawa, Shoji Matsumoto, Toshikazu Matsui
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Patent number: 4430410Abstract: In a method and apparatus for developing a latent electrostatic image formed on the surface of an image-bearing material by applying a powdery developer thereto, which includes magnetically retaining a layer of a relatively conductive one-component developer having a resistivity of not more than 10.sup.13 ohms-cm on the surface of a developer-retaining member, and bringing the developer on the surface of the developer-retaining member into contact with the surface of the image bearing material, the improvement wherein the developer-retaining member has a resistance, measured by a point-plane resistance measuring method in an environment kept at a temperature of 20.degree. C. and a humidity of 50%, of from 3.times.10.sup.7 ohms to 1.times.10.sup.10 ohms. The improved method makes possible good development without causing a background fog or a tail effect.Type: GrantFiled: August 27, 1979Date of Patent: February 7, 1984Assignee: Mita Industrial Co., Ltd.Inventors: Tatsuo Aizawa, Shoji Matsumoto, Kaoru Sakata, Toshikazu Matsui, Akira Fushida, Toshimitsu Ikeda, Nobuyoshi Hisao
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Patent number: 4380579Abstract: An electrostatic copying apparatus has a housing having at its top surface a transparent plate on which to place an original to be copied, a rotary drum disposed within the housing and having a photosensitive member on its surface, a charging, a developing, a transferring and a cleaning mechanism which are successively arranged around the rotary drum in the moving direction of its surface, an optical system for projecting the image of the original onto the surface of the rotary drum between the charging means and the developing means, and a receptor sheet conveying system for transferring a receptor sheet through a transfer station defined between the surface of the rotary drum and the transferring mechanism.Type: GrantFiled: October 26, 1979Date of Patent: April 19, 1983Inventors: Shoji Matsumoto, Toshikazu Matsui, Toshimitsu Ikeda, Nobuhiko Kozuka, Hitoshi Nishihama, Tatsuo Aizawa
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Patent number: D308987Type: GrantFiled: August 2, 1988Date of Patent: July 3, 1990Assignee: Mita Industrial Co., Ltd.Inventors: Toshikazu Matsui, Shigetoshi Ishikawa, Yoshinari Itoi
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Patent number: D310540Type: GrantFiled: August 2, 1988Date of Patent: September 11, 1990Assignee: Mita Industrial Co., Ltd.Inventors: Toshikazu Matsui, Shigetoshi Ishikawa, Yoshinari Itoi