Patents by Inventor Hiromu Sasaki
Hiromu Sasaki 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: 5352559Abstract: A photosensitive sheet comprising a sheet-shaped substrate, one surface of which is coated with a light-reflective substance or which is made of a light-reflective substance, and pressure-rupturable capsules that coat the light-reflective surface of the substrate or the other surface of the substrate, the pressure-rupturable capsules containing chromogenic materials and photosensitive materials that are hardened when illustrated with light, and a method for the formation of images using the said photosensitive sheet.Type: GrantFiled: December 1, 1992Date of Patent: October 4, 1994Assignee: Sharp Kabushiki KaishaInventors: Yoshiharu Tsujimoto, Kunio Ohashi, Yoshikazu Fujiwara, Hiromu Sasaki, Syoichi Nagata
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Patent number: 5178985Abstract: A method for image formation comprising the steps of exposing a light-receiving sheet coated with a layer of microcapsules containing photopolymerization agent and colorless dye selectively to light so as to form a cured image thereon opposite in sense to the desired final image, laying an image-receiving sheet uniformly coated with a layer of a developing material for reacting with and coloring the colorless dye on the light-receiving sheet, heating the resulting sandwich configuration and pressing these sheets against each other thereby rupturing the uncured microcapsules to form a colored image.Type: GrantFiled: March 7, 1991Date of Patent: January 12, 1993Assignee: Sharp Kabushiki KaishaInventors: Yoshiharu Tsujimoto, Kunio Ohashi, Yoshikazu Fujiwara, Hiromu Sasaki
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Patent number: 4916478Abstract: A sheet-exposure stand supporting a photosensitive sheet on its sheet-placement surface, the photosensitive sheet being composed of a light-permeable substrate that is coated with pressure-rupturable capsules that contain chromogenic materials and photosensitive materials that are hardened when illuminated with light, and the sheet-placement surface being coated with or made of a light-reflective substance, and a method for the formation of images using the same.Type: GrantFiled: July 11, 1988Date of Patent: April 10, 1990Assignee: Sharp Kabushiki KaishaInventors: Yoshiharu Tsujimoto, Kunio Ohashi, Yoshikazu Fujiwara, Hiromu Sasaki, Syoichi Nagata
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Patent number: 4910533Abstract: A color thermal printer of a type which utilizes any one of ink ribbons of different color combination, which comprises a different identifiers provided on and peculiar to each of the different ink ribbons and descriptive of the color combination of the respective ink ribbon; and a detecting system cooperable with any one of the identifiers for detecting, and providing an output signal indicative of, one of the ink ribbons of different color combination which is actually mounted on the printer. The output signal from the detecting means is utilized to instruct the thermal printer that the ink ribbon of the particular color combination has actually been mounted on the printer.Type: GrantFiled: August 23, 1988Date of Patent: March 20, 1990Assignee: Sharp Kabushiki KaishaInventors: Hiromu Sasaki, Fumikazu Nagano
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Patent number: 4905045Abstract: An image forming device such as a copying machine provides a linearly polarized beam of light to be made incident on a document to be scanned which is placed on a document table. A transparent cover with a polarization filter attached to it covers the document such that the user can ascertain, without too much light entering his eyes, whether the document is placed at a correct position on the table.Type: GrantFiled: March 29, 1989Date of Patent: February 27, 1990Assignee: Sharp Kabushiki KaishaInventors: Hiromu Sasaki, Akihiro Soga
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Patent number: 4803522Abstract: A sheet refeeding apparatus for use in combination with a multipurpose image forming system capable of multistage copying operation. The sheet refeeding apparatus has a secondary sheet conveying mechanism forming a secondary sheet conveying path extending from the sheet discharge section to the sheet feed section of the image forming system, and includes variable speed driving means for regulating the operating speed of the secondary sheet conveying mechanism, memory means storing a plurality of control data for controlling the variable speed driving means, and selecting means for selecting control data for controlling the variable speed driving means so that the secondary sheet conveying means operates synchronously with the sheet conveying mechanism of the image forming system among those stored in the memory means.Type: GrantFiled: June 16, 1987Date of Patent: February 7, 1989Assignee: Sharp Kabushiki KaishaInventor: Hiromu Sasaki
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Patent number: 4771318Abstract: A copying machine with a multiple transport function having a separation charger for separating from the photoreceptor surface copy paper with an image transferred thereon and a circulating transport passage formed from the paper discharge block to the paper feed block so that it is possible to select the single-sided copy mode for allowing the copy paper to be discharged outside the copying machine after the copying process, the duplex copy mode for allowing the copy paper undergoing one copying process to be led through the circulating transport passage to the copying process block as reversed, or the composite copy mode for allowing the copy paper undergoing one copying process to be led through the circulating transport passage to the copying process block without being reversed.Type: GrantFiled: August 21, 1987Date of Patent: September 13, 1988Assignee: Sharp Kabushiki KaishaInventors: Teruhiko Noguchi, Itaru Kawabata, Hiroshi Kinashi, Yoshiharu Tsujimoto, Hiromu Sasaki
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Patent number: 4766403Abstract: A copying machine utilizing a generally endless photoreceptor belt trained between reduced and large diameter rolls. At least one of the rolls is drivingly coupled with a drive unit and is driven at a low speed when and so long as the machine is in a standby condition to avoid localized heating of the photoreceptor belt.Type: GrantFiled: July 16, 1986Date of Patent: August 23, 1988Assignee: Sharp Kabushiki KaishaInventors: Hiromu Sasaki, Ikuo Itoh
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Patent number: 4713550Abstract: A document size detection apparatus having a plurality of sensor portions including light emitting devices and photodetector devices disposed in the vicinity of an original table for detecting the size of a document such as an original mounted on the original table is disclosed. This apparatus uses reflected light or transmitted light, a comparator for comparing the output level of the sensor portion with a reference level, and decision means for deciding the document size depending on the output signal of the comparator.Type: GrantFiled: October 8, 1986Date of Patent: December 15, 1987Assignee: Sharp Kabushiki KaishaInventors: Shunju Anzai, Hiromu Sasaki, Norihide Kunikawa, Kazuyuki Ohgita
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Patent number: 4564847Abstract: The disclosure is directed to an image recording arrangement for use in facsimile equipment and the like, adapted to effect an image recording at a rough density for standard information and an image recording at high density for fine information at a density at least two times that of the rough density. The recording arrangement includes a recording head having a dot density sufficient to resolve the high density so that, during the recording at the rough density, one bit of the recording information corresponds to at least two dots of the recording head.Type: GrantFiled: May 9, 1984Date of Patent: January 14, 1986Assignee: Sharp Kabushiki KaishaInventors: Motohiko Hayashi, Toshiaki Karita, Matahira Kotani, Hiromu Sasaki
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Patent number: 4560992Abstract: The disclosure is directed to an image recording arrangement for use in a facsimile equipment and the like, adapted to effect an image recording at rough density for standard information and an image recording at high density for fine information at a density at least two times that of the rough density. The recording arrangement includes a recording head having a dot density sufficient to resolve the high density so that, during the recording at the rough density, one bit of the recording information corresponds to at least two dots of the recording head.Type: GrantFiled: May 9, 1984Date of Patent: December 24, 1985Assignee: Sharp Kabushiki KaishaInventors: Motohiko Hayashi, Toshiaki Karita, Matahira Kotani, Hiromu Sasaki
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Patent number: 4491853Abstract: The disclosure is directed to an image recording arrangement for use in facsimile equipment and the like, adapted to effect an image recording at a rough density for standard information and an image recording at high density for fine information at a density at least two times that of the rough density. The recording arrangement includes a recording head having a dot density sufficient to resolve the high density so that, during the recording at the rough density, one bit of the recording information corresponds to at least two dots of the recording head.Type: GrantFiled: October 13, 1982Date of Patent: January 1, 1985Assignee: Sharp Kabushiki KaishaInventors: Motohiko Hayashi, Toshiaki Karita, Matahira Kotani, Hiromu Sasaki
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Patent number: 4383275Abstract: An optical reader system includes a plurality of sensor elements for providing a picture signal. Before initiating an actual reading operation, a white background plate is scanned to obtain reference information. The white background plate data is reversed to obtain a reciprocal of the white level and the thus obtained reciprocal is memorized in a memory. In an actual reading operation, the picture signal derived from the sensor elements is multiplied by the reciprocal memorized in the memory to compensate for the nonuniformity of the sensor outputs.Type: GrantFiled: September 26, 1980Date of Patent: May 10, 1983Assignee: Sharp Kabushiki KaishaInventors: Hiromu Sasaki, Nobuo Nakamura, Humikazu Nagano
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Patent number: 4336547Abstract: An ink jet system printer of the charge amplitude controlling type includes a reciprocating printer head and a constant flow rate plunger pump. An actual printing operation is conducted while the printer head is driven to travel forward, and the constant flow rate plunger pump is energized to develop the ink liquid when the printer head is driven to travel backward. A pressure accumulator of a small capacity is disposed between the constant flow rate plunger pump and the printer head for minimizing the pressure pulsation created by the constant flow rate plunger pump.Type: GrantFiled: September 11, 1980Date of Patent: June 22, 1982Assignee: Sharp Kabushiki KaishaInventors: Masafumi Matsumoto, Matahira Kotani, Hiromu Sasaki
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Patent number: 4228468Abstract: An optical image reading apparatus comprises a solid state image sensor having a plurality of blocks, means for generating video signals correponding to an object to be read out by the solid state image sensor, means for determining respective mean values of the video signals concerning the blocks, means for storing the mean values in digital information, means for reading out the stored mean value and converting the digital information to analog information, and means for determining a corrected slice level in each of the blocks.Type: GrantFiled: August 22, 1978Date of Patent: October 14, 1980Assignee: Sharp Kabushiki KaishaInventors: Humikazu Nagano, Hiromu Sasaki, Syoichi Yasuda
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Patent number: 4149143Abstract: An image sensor output correcting system wherein a correcting region of an object being read is scanned in advance by means of a sensor array, thereby to provide a correcting signal based on the signal obtained in the scanning operation for correcting the scanning video signal of the region being read, characterized in that the video signal obtained during the scanning operation of the correcting region is sampled with a predetermined interval, the video signals of the sensor corresponding to a plurality of scanning lines are compared, and the maximum value is stored as the correcting signal, whereby high speed scanning can be made without degrading the correcting function as compared with a system where the outputs of the respective sensors of the sensor array are analog to digital converted to generate the correcting signal.Type: GrantFiled: July 22, 1977Date of Patent: April 10, 1979Assignee: Sharp Kabushiki KaishaInventors: Humikazu Nagano, Hiromu Sasaki, Syoichi Yasuda
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Patent number: 4080210Abstract: A method and apparatus for preparing uniformly-sized particles wherein a first liquid reactant is chemically reacted with a second liquid reactant to form precipitated particles of substantially uniform particle size which comprises forming substantially uniformly-sized droplets of one of said reactants and directing said droplets against the falling flow of the other of said reactants.Type: GrantFiled: December 8, 1975Date of Patent: March 21, 1978Assignee: Shoei Chemical IncorporatedInventors: Eiichi Asada, Hiromu Sasaki, Toshio Matsuhashi
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Patent number: 4003021Abstract: Optical information on a card is read by an image sensor and then converted to a video signal represented by a digital signal of several bits through the use of an amplifier and an A - D converter. A reference level is determined by scanning a reference portion which is preferably provided along one edge of the card. The video signal is quantized by comparing with three sliced levels corresponding to 0.5, 0.75 and 0.85 times the reference level. The quantized information is applied to a recognition station.Type: GrantFiled: March 24, 1975Date of Patent: January 11, 1977Assignee: Sharp Kabushiki KaishaInventors: Hiromu Sasaki, Syoichi Yasuda, Humikazu Nagano