Patents by Inventor Takuma Ishikawa

Takuma Ishikawa 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).

  • Patent number: 9663652
    Abstract: Provided is a polybutylene terephthalate resin composition having excellent mold releasability, measurement stability and hydrolysis resistance, and exhibiting minimal discoloration under high-temperature conditions. The polybutylene terephthalate resin composition contains: (A) a polybutylene terephthalate resin, (B) a higher fatty acid ester of pentaerythritol, and (C) a low-molecular weight polyethylene having a number-average molecular weight of 3,000 to 7,000. It is preferable that the component (B) is pentaerythritol tetrastearate, and that the component (C) is a low-molecular weight polyethylene having a number-average molecular weight of 4,500 to 5,500.
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: May 30, 2017
    Assignee: WinTech Polymer Ltd.
    Inventors: Takuma Ishikawa, Takayuki Ishikawa, Kazuya Goshima
  • Publication number: 20170002194
    Abstract: Provided is a polybutylene terephthalate resin composition having excellent mold releasability, measurement stability and hydrolysis resistance, and exhibiting minimal discoloration under high-temperature conditions. The polybutylene terephthalate resin composition contains: (A) a polybutylene terephthalate resin, (B) a higher fatty acid ester of pentaerythritol, and (C) a low-molecular weight polyethylene having a number-average molecular weight of 3,000 to 7,000. It is preferable that the component (B) is pentaerythritol tetrastearate, and that the component (C) is a low-molecular weight polyethylene having a number-average molecular weight of 4,500 to 5,500.
    Type: Application
    Filed: January 27, 2015
    Publication date: January 5, 2017
    Applicant: WinTech Polymer Ltd.
    Inventors: Takuma Ishikawa, Takayuki Ishikawa, Kazuya Goshima
  • Publication number: 20140002912
    Abstract: The present invention provides a lens drive device including a base, a lens frame holding a lens and provided to be movable with respect to the base in an optical axis direction of the lens, a light bending portion for bending incident light on the lens, a driving unit for moving the lens frame, and a position detection unit for detecting a position of the lens frame. The position detection unit includes a reflection portion provided to one of the base and the lens frame and including a reflection surface inclined with respect to the optical axis of the lens, and a photoreflector provided to the other of the base and the lens frame and including a light projecting portion applying light to the reflection surface and a light receiving portion receiving light reflected on the reflection surface.
    Type: Application
    Filed: January 31, 2012
    Publication date: January 2, 2014
    Inventors: Takuma Ishikawa, Hiroki Ito, Yohsuke Ikeda, Takafumi Ishikawa, Hiroyuki Watanabe
  • Publication number: 20130314809
    Abstract: The present invention provides a lens drive device including a base member arranged inside a lens barrel, a lens frame holding a lens and provided to be movable with respect to the base member in an optical axis direction of the lens, a voice coil motor for moving the lens frame, and a position detection unit for detecting a position of the lens frame. The position detection unit includes a reflection portion provided to one of the base and the lens frame and including a reflection surface inclined with respect to the optical axis of the lens, and a photoreflector provided to the other of the base member and the lens frame and including a light projecting portion applying light to the reflection surface and a light receiving portion receiving light reflected on a reflection flat surface.
    Type: Application
    Filed: January 30, 2012
    Publication date: November 28, 2013
    Inventors: Hiroyuki Watanabe, Yohsuke Ikeda, Takafumi Ishikawa, Takuma Ishikawa, Hiroki Ito
  • Patent number: 6126163
    Abstract: A sheet aligning apparatus for a copying machine having a loading unit capable of loading a plurality of stacked sheets. A comparing unit determines and compares respective sizes of at least two sheets partially stacked and loaded on the loading unit. An alignment unit carries out alignment when the width of a sheet of a first job is the same or smaller than a sheet of a second job and inhibits carrying out alignment when the width of a sheet of the first job is greater than a sheet of the second job. The apparatus further includes first and second discharge units for discharging a group of sheets from respective first and second jobs onto the load unit. A determination unit determines successiveness of the first and second jobs and, based on a result of the determination, a post-processing unit executes post-processing for the group of sheets of the first job upon completion of discharging the group of sheets of the second job.
    Type: Grant
    Filed: August 18, 1998
    Date of Patent: October 3, 2000
    Assignee: Minolta Co., Ltd.
    Inventors: Kunihiko Katsuta, deceased, by Shikou Komaki, legal representative, Takuma Ishikawa, Masayoshi Horikawa, Syuichi Katohgi
  • Patent number: 5809372
    Abstract: A processing apparatus is utilized for a copying machine capable of executing successively a first job and then a second job. An user inputs the number of originals, the number of copies to be made, or the like using a picture plane for setting the first job. Based on information about the input numbers of originals and copies, and information about a copying operation that can be carried out by the copying machine, the number of originals and the number of copies that can be set for the second job are determined. The determined numbers of originals and copies are displayed. Accordingly, the number of originals and the number of copies which exceed a limitation of processing by the copying machine would not be input, thereby improving handling of the apparatus.
    Type: Grant
    Filed: April 16, 1997
    Date of Patent: September 15, 1998
    Assignee: Minolta Co., Ltd.
    Inventors: Kunihiko Katsuta, Takuma Ishikawa, Masayoshi Horikawa, Syuichi Katohgi, Koji Higashikawa, Satoshi Fujii
  • Patent number: 5470051
    Abstract: An automatic document feeder for conveying a document on a platen glass. Back-up rollers for pressing a conveyer belt against the platen glass are loosely supported by a body frame. The shafts of a driving roller and a driven roller for rotating the conveyer belt, and the supporting member of the back-up rollers each have an end which is detachable from the body frame. The body frame has a first frame pivoted on a copying machine and a second frame for holding the conveyer belt and its motor. The second frame is connected with the first frame such that the second frame is movable from and to the platen glass with a specified range, and further the second frame is urged in a direction separating from the platen glass. The second frame is also movable in a direction perpendicular to a direction in which the pivot of the first frame extends.
    Type: Grant
    Filed: December 3, 1993
    Date of Patent: November 28, 1995
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Yuusuke Morigami, Hirokazu Matsuo, Hirofumi Tanahashi, Yoshihito Hirano, Hiroyasu Nagato, Takuma Ishikawa
  • Patent number: 5347352
    Abstract: Copying apparatus capable of high speed document exchange and high speed copying. Sets an original at the exposure position and prefeeds at least two originals to their respective standby positions. Pre-fed originals are detected by various sensors. Prefeeds copy paper for the respective originals based on the aforesaid detection results. Copying efficiency is improved by prefeeding originals and prefeeding copy paper.
    Type: Grant
    Filed: September 28, 1992
    Date of Patent: September 13, 1994
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Yuusuk Morigami, Akira Ohhata, Wataru Hamakawa, Hirokazu Matsuo, Hiroyasu Nagato, Takuma Ishikawa
  • Patent number: 5327206
    Abstract: An image forming apparatus having a refeeding unit for temporarily containing image-formed sheets as a horizontal pile and for refeeding the sheets for the second image forming operation. The refeeding unit can be pulled out from a body frame in the direction perpendicular to a sheet transporting direction. A setting position of the refeeding unit in the body frame can be adjusted to be parallel with the sheet transporting direction. The refeeding unit has an intermediate tray on which the sheets are piled, a refeeding roller which feeds the sheets piled on the intermediate tray from the most bottom sheet successively one by one, a sheet front end aligning member, a sheet rear end aligning member, a sheet side aligning member and a sheet pressing plate which, every time a sheet is transported to the intermediate tray and every time a sheet is refed from the intermediate tray, presses the sheet toward the refeeding roller.
    Type: Grant
    Filed: July 14, 1992
    Date of Patent: July 5, 1994
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Masahide Ueda, Takashi Onishi, Takuma Ishikawa, Hirofumi Tanahashi
  • Patent number: 5292113
    Abstract: An automatic document feeder for conveying a document on a platen glass. Back-up rollers for pressing a conveyer belt against the platen glass are loosely supported by a body frame. The shafts of a driving roller and a driven roller for rotating the conveyer belt, and the supporting member of the back-up rollers each have an end which is detachable from the body frame. The body frame has a first frame pivoted on a copying machine and a second frame for holding the conveyer belt and its motor. The second frame is connected with the first frame such that the second frame is movable from and to the platen glass with a specified range, and further the second frame is urged in a direction separating from the platen glass. The second frame is also movable in a direction perpendicular to a direction in which the pivot of the first frame extends.
    Type: Grant
    Filed: September 28, 1992
    Date of Patent: March 8, 1994
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Yuusuke Morigami, Hirokazu Matsuo, Hirofumi Tanahashi, Yoshihito Hirano, Hiroyasu Nagato, Takuma Ishikawa
  • Patent number: 5213322
    Abstract: In an original transfer apparatus, a pair of rollers around which a transfer belt is stretched and pressing rollers provided between the pair of rollers and adapted to press the transfer belt against the platen are held with each end portion of each shaft of the rollers being fixed to a frame of a body of the transfer apparatus so as to be attachable and detachable directly and separately. The fitting of these rollers is executed by fitting at least three end portions of the shafts of the pair of rollers and each end portion of each shaft of the pressing rollers to the frame from a side opposed to the platen of the frame of the body.
    Type: Grant
    Filed: November 6, 1991
    Date of Patent: May 25, 1993
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Hirokazu Matsuo, Yuusuke Morigami, Takuma Ishikawa
  • Patent number: 5141215
    Abstract: A sorter-finisher wherein sheets discharged from an image forming apparatus are distributed among a plurality of bins in a sorter unit, and thereafter the sheets are taken out of each bin and transported to a finisher unit to be finished. The bins are put one upon another, and they are movable up and down. A take-out unit for taking sheets out of each bin in order to transport the sheets to the finisher unit is installed above the bins positioned for the distributing operation. Each bin is moved up to the position facing the take-out unit and further is laterally moved toward the take-out unit, and the sheets in the bin are taken out thereof nipped by a pair of rollers. Further, the sorter-finisher comprises a transporting unit which is a route from the discharge portion of the image forming apparatus to a receiving/take-out portion of the sorter unit, and sheets are transported to the bins and also transported to the finisher unit through the transporting unit.
    Type: Grant
    Filed: August 16, 1989
    Date of Patent: August 25, 1992
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Kuniaki Ishiguro, Takuma Ishikawa, Toshio Matsui
  • Patent number: 5133539
    Abstract: A sorter-finisher wherein sheets discharged from an image forming apparatus are distributed among a plurality of bins in a sorter unit, and thereafter the sheets are taken out of each bin and transported to a finisher unit to be finished. The bins are put one upon another, and they are movable up and down. A take-out unit for taking sheets out of each bin in order to transport the sheets to the finisher unit is installed above the bins positioned for the distributing operation. Each bin is moved up to the position facing the take-out unit and further is laterally moved toward the take-out unit, and the sheets in the bin are taken out thereof nipped by a pair of rollers. Further, the sorter-finisher comprises a transporting unit which is a route from the discharge portion of the image forming apparatus to a receiving/take-out portion of the sorter unit, and sheets are transported to the bins and also transported to the finisher unit through the transporting unit.
    Type: Grant
    Filed: March 7, 1991
    Date of Patent: July 28, 1992
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Kuniaki Ishiguro, Takuma Ishikawa, Toshio Matsui
  • Patent number: 5117266
    Abstract: An automatic original feeding handler adapted for transporting an original to a reading portion in an image forming apparatus. The automatic original feeding handler is provided with an accommodating portion upwardly provided with respect to the reading portion for accommodating originals stacked therein, a supplying member for supplying a lowermost original of the stacked originals one by one to the reading portion, a transporting member for transporting on the reading portion the original supplied by the supplying member and returning that original to the accommodating portion, a counting member for counting the number of the originals and a control member for controlling the supplying member so as to change the timing for start of supplying the original according to a count value counted by the counting member.
    Type: Grant
    Filed: August 14, 1991
    Date of Patent: May 26, 1992
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Kazutaka Takemura, Hirokazu Matsuo, Yusuke Morigami, Wataru Hamakawa, Takuma Ishikawa
  • Patent number: 5084741
    Abstract: An automatic document handler adapted for transporting an original document to a reading portion in an image forming apparatus. The automatic document handler is provided with an accommodating portion the reading portion for accommodating stacked original documents therein, a supplying member for supplying a lowermost original document of the stacked original documents one by one to the reading portion, a transporting member for transporting on the reading portion the original supplied by the supplying member and returning the original to the accommodating portion, a counting member for counting the number of the original documents and a control member for controlling the supplying member so as to change the timing for the start of the supplying of the original document according to a count value counted by the counting member.
    Type: Grant
    Filed: March 27, 1990
    Date of Patent: January 28, 1992
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Kazutaka Takemura, Hirokazu Matsuo, Yusuke Morigami, Wataru Hamakawa, Takuma Ishikawa
  • Patent number: 5081489
    Abstract: A copying apparatus having an automatic original document feeder (ADF unit), which includes a sheet size detecting system for detecting each size of original documents fed by the ADF unit and a boundary detecting system for detecting a boundary between sets of originals which are placed on a tray of the ADF unit. The boundary detecting system discriminates the boundary between sets of originals based on a variation of the size of the original document, of which the size is detected by the sheet size detecting system.
    Type: Grant
    Filed: January 4, 1989
    Date of Patent: January 14, 1992
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Takuma Ishikawa, Akiyoshi Johdai
  • Patent number: 5053831
    Abstract: A copying machine having a sorter and a finisher is capable of operating in three different modes: a copying mode with sorting, a copying mode without sorting, and a stapling finish mode. When the stapling finish mode is selected, an automatic magnification selecting mode (AMS mode) is automatically chosen, wherein only copies of one size are made during the copying operation such that unsatisfactory stapling caused by copy sheets of differing size is prevented. Also, if one of a number of sorting bins of the copying machine is not being used while the copying machine is operating in the stapling finish mode, a copying operation can be carried out in the copying mode without sorting, utilizing that bin.
    Type: Grant
    Filed: February 17, 1989
    Date of Patent: October 1, 1991
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Kuniaki Ishiguro, Takuma Ishikawa, Akiyoshi Johdai, Hiroki Yamashita
  • Patent number: 5014092
    Abstract: An image forming apparatus with a binding function wherein small bands of toner are deposited on paper sheets, a plurality of said sheets are then stacked and thereafter said small bands of deposited toner are fused, thereby binding said sheets.In order to form said small bands of toner on an electrostatic latent image carrier, the present invention is provided with a charger disposed between an exposure position and the developing position so as to be movable perpendicularly to the paper transport direction, an optical shutter disposed in the image exposure optical path and selectably operable, or a scale disposed at one side of a platen glass for preventing light from reaching the image carrier.Said small band of toner formed on the image carrier may be developed by a special toner such as waste toner removed from the surface of the image carrier after being supplied to copy the original document image, white toner, color toner, or highly self-adhesive toner.
    Type: Grant
    Filed: June 1, 1989
    Date of Patent: May 7, 1991
    Assignee: Minolta Camera Co., Ltd.
    Inventors: Naoki Kubo, Takuma Ishikawa, Toshio Matsui, Fumitoshi Atsumi, Yasuhiko Doi
  • Patent number: 4980721
    Abstract: A copying apparatus having an automatic document feeder (ADF), and a sorter having a plurality of bins. The apparatus comprises an input mechanism for setting the number of sheets to be copied with respect to one original document; a detecting system for detecting a boundary between units of originals; a first control system for controlling the sorter so that the bins are altered one to another every time the boundary is detected by the detecting system when the number of sheets is set to one; a second control system for controlling the sorter so that the bins are altered one to another when the number of copied sheets accommodated in one bin exceeds its capacity of each bin while a copying operation for one unit of originals is being performed. When a sheet, inserted between units of originals, whose size is different from the sizes of original documents is fed by the ADF, the detecting system judges that it is the boundary therebetween.
    Type: Grant
    Filed: January 4, 1989
    Date of Patent: December 25, 1990
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Takuma Ishikawa, Akiyoshi Johdai
  • Patent number: RE34460
    Abstract: In a copying apparatus having a sorter with a sheet stapling function; the sorter has a plurality of bins capable of independently moving up or down, wherein sheets are sorted into the bins sequentially from the top bin to the bottom bin; the bins are moved down to a position where sheets are taken by take-out rollers for transporting them to a stapling unit after the sorting operation; and the bins other than those assigned for the number of copy sets are moved down to the take-out position during the sorting operation. Further, a copying apparatus has a controller which inhibits a copying machine from starting to operate when both a non-sorting mode and a stapling mode are selected at a time and when the input number of copy sets is .[.more than.]. 2 .Iadd.or more.Iaddend., and may cancel the stapling mode during the sorting operation in the stapling mode and continue the sorting operation even after canceling the stapling mode.
    Type: Grant
    Filed: February 14, 1992
    Date of Patent: November 30, 1993
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Kuniaki Ishiguro, Takuma Ishikawa