Patents by Inventor Daisuke Mitsuhashi

Daisuke Mitsuhashi 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: 8852728
    Abstract: There are provided a pattern exposure method, a conductive film producing method, and a conductive film, wherein a photosensitive material is subjected to a proximity exposure through a photomask disposed with a proximity gap of 70 to 200 ?m, and thereby is exposed in the mask pattern periodically in the conveying direction to obtain a conductive film. The conductive film has a plurality of conductive portions of first and second conductive thin metal wires and a plurality of opening portions. A side of each thin metal wire has a protrusion extending toward the opening portion from a virtual line representing a designed width of the thin metal wire, and the protruding amount of the protrusion is 1/25 to ? of the designed width.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: October 7, 2014
    Assignee: FUJIFILM Corporation
    Inventors: Toyomi Matsuda, Makoto Sutou, Tomonori Baba, Daisuke Mitsuhashi
  • Patent number: 8383329
    Abstract: There are provided a pattern exposure method, a conductive film producing method, and a conductive film, wherein a photosensitive material is subjected to a proximity exposure through a photomask disposed with a proximity gap of 70 to 200 ?m, and thereby is exposed in the mask pattern periodically in the conveying direction to obtain a conductive film. The conductive film has a plurality of conductive portions of first and second conductive thin metal wires and a plurality of opening portions. A side of each thin metal wire has a protrusion extending toward the opening portion from a virtual line representing a designed width of the thin metal wire, and the protruding amount of the protrusion is 1/25 to 1/6 of the designed width.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: February 26, 2013
    Assignee: FUJIFILM Corporation
    Inventors: Toyomi Matsuda, Makoto Sutou, Tomonori Baba, Daisuke Mitsuhashi
  • Publication number: 20100300729
    Abstract: There are provided a pattern exposure method, a conductive film producing method, and a conductive film, wherein a photosensitive material is subjected to a proximity exposure through a photomask disposed with a proximity gap of 70 to 200 ?m, and thereby is exposed in the mask pattern periodically in the conveying direction to obtain a conductive film. The conductive film has a plurality of conductive portions of first and second conductive thin metal wires and a plurality of opening portions. A side of each thin metal wire has a protrusion extending toward the opening portion from a virtual line representing a designed width of the thin metal wire, and the protruding amount of the protrusion is 1/25 to 1/6 of the designed width.
    Type: Application
    Filed: May 28, 2010
    Publication date: December 2, 2010
    Applicant: FUJIFILM CORPORATION
    Inventors: Toyomi Matsuda, Makoto Sutou, Tomonori Baba, Daisuke Mitsuhashi
  • Patent number: 5717551
    Abstract: A magnetic head having a control portion provided integrally with an opposing surface located opposing the recording surface of a magnetic disc or a head mount for generating a negative pressure between the control portion and the magnetic disc to attract the magnetic disc towards the magnetic head, thereby generating an adequate and sufficient negative pressure in the vicinity of the magnetic head and achieving a good head touch. This configuration enables compact design of the mechanism and an increased recording area of the magnetic disc compared with the case in which a magnetic head and a negative pressure generation type stabilizing plate to attract the magnetic disc towards the magnetic head are separately disposed, and eliminates the need for procedures for separate positioning of the individual magnetic head and stabilizing plate, thereby achieving a considerable reduction in manufacturing steps and production cost.
    Type: Grant
    Filed: May 18, 1995
    Date of Patent: February 10, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kenji Negishi, Daisuke Mitsuhashi, Yoshiaki Kato, Akira Takimoto, Noboru Kawasaki
  • Patent number: 5249093
    Abstract: A magnetic disk comprises an annular resilient magnetic recording mediumm, an outer ring having an outer affixing surface, and an annular frame disposed radially inwardly of the outer ring. The annular frame comprises an annular thrusting surface protruded axially for thrusting the recording medium to exert tension to it, an inner affixing surface inwardly affixed to the recording medium, and a base axially receded from the thrusting surface.
    Type: Grant
    Filed: June 11, 1991
    Date of Patent: September 28, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masaru Umekida, Daisuke Mitsuhashi
  • Patent number: 5204795
    Abstract: A magnetic recording and reproduction system having magnetic heads opposing each other across a magnetic disk. The heads have shaped control portions to generate a negative pressure between the magnetic heads and the magnetic disk in association with rotation of the magnetic disk. One magnetic head is supported by an elastic member which is structured to be slightly dislocatable by the negative pressure. The magnetic heads are caused by the negative pressure to come in sliding contact with both sides of the magnetic disk, thereby obtaining positive sliding contact with extremely small contact resistance between the magnetic heads and the magnetic disk and achieving a good head contact while minimizing abrasion of the magnetic disk and the magnetic heads. The control portions to generate the negative pressure are formed integrally with the magnetic heads, thus simplifying the structure, reducing the manufacturing steps such as positioning procedures and achieving a reduction in cost.
    Type: Grant
    Filed: November 12, 1991
    Date of Patent: April 20, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Daisuke Mitsuhashi
  • Patent number: 5175660
    Abstract: A magnetic sheet control member, for use in a device for recording and reproduction using a magnetic head in sliding contact with a rotary flexible magnetic sheet, to guide the magnetic sheet to the magnetic head by a negative pressure, having upstream-side and downstream-side inclined surfaces disposed respectively at the upstream side and the downstream side with respect to the rotational direction of the magnetic sheet and inclined to become more distant from the free rotary surface plane of the magnetic sheet towards the downstream side, and stabilizing surfaces disposed respectively at the outer side and inner side with respect to the radial direction of the magnetic sheet to connect the upstream-side inclined surface and the downstream-side inclined surface, thereby obtaining a stable head contact over the entire recording area from the innermost side to the outermost side of the magnetic sheet.
    Type: Grant
    Filed: July 8, 1991
    Date of Patent: December 29, 1992
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Daisuke Mitsuhashi, Shigeru Ando, Tomoyuki Nishiyama
  • Patent number: 5138509
    Abstract: A magnetic disk control member having a flat opposing surface opposing a rotating magnetic disk that defines a free rotary surface plane and provided protrudingly with a magnetic head, a protrusion for generating a negative pressure disposed at the upstream side with respect to the rotational direction of the magnetic disk, and an inclined surface disposed at an end of the opposing surface at the downstream side with respect to the rotational direction of the magnetic disk and inclined so as to gradually become closer to the free rotary surface plane towards the downstream side with respect to the rotational direction of the magnetic disk.
    Type: Grant
    Filed: August 30, 1991
    Date of Patent: August 11, 1992
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Daisuke Mitsuhashi
  • Patent number: 5130878
    Abstract: A regulating plate disposed opposite to a magnetic head with respect to a rotary flexible magnetic disk and in sliding contact with the flexible magnetic disk, having protruding portions provided on the regulating plate at upstream and downstream sides of the magnetic head, top portions of the protruding portions being formed to flat surfaces, thereby obtaining stable sliding contact of the magnetic head with the flexible magnetic disk from the beginning, and a thin film magnetic head comprised at least of a magnetic layer, a coil conductor layer, and an insulative layer formed on a substrate, and a protective layer stacked on the magnetic layer, characterized in that the protective layer comprises MgO, SiO.sub.2, and Al.sub.2 O.sub.3.
    Type: Grant
    Filed: March 7, 1990
    Date of Patent: July 14, 1992
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Daisuke Mitsuhashi, Noboru Kawasaki, Osamu Shimizu, Satoshi Yoshida, Takashi Kubo
  • Patent number: 5107384
    Abstract: A magnetic recording and reproduction device having magnetic heads opposing each other across a magnetic disk. The heads have shaped control portions to generate a negative pressure between the magnetic heads and the magnetic disk in association with rotation of the magnetic disk. One magnetic head is supported by an elastic member which is structured to be slightly dislocatable by the negative pressure. The magnetic heads are caused by the negative pressure to come in sliding contact with both sides of the magnetic disk, thereby obtaining positive sliding contact with extremely small contact resistance between the magnetic heads and the magnetic disk and achieving a good head contact while minimizing abrasion of the magnetic disk and the magnetic heads. The control portions to generate the negative pressure are formed integrally with the magnetic heads, thus simplifying the structure, reducing the manufacturing steps such as positioning procedures and achieving a reduction in cost.
    Type: Grant
    Filed: April 11, 1990
    Date of Patent: April 21, 1992
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Daisuke Mitsuhashi
  • Patent number: 5055955
    Abstract: A magnetic recording and reproduction device having magnetic heads opposing each other across a magnetic disk. The heads have shaped control portions to generate a negative pressure between the magnetic heads and the magnetic disk. Each magnetic head is supported by an elastic member which is structured to be slightly dislocatable by the negative pressure. The magnetic heads are caused by the negative pressure to come in sliding contact with both sides of the magnetic disk, thereby obtaining positive sliding contact with extremely small contact resistance between the magnetic heads and the magnetic disk and achieving a good head contact while minimizing abrasion of the magnetic disk and the magnetic heads. The control portions to generate the negative pressure are formed integrally with the magnetic heads, thus simplifying the structure, reducing the manufacturing steps such as positioning procedures and achieving a reduction in cost.
    Type: Grant
    Filed: March 5, 1990
    Date of Patent: October 8, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Daisuke Mitsuhashi, Noboru Kawasaki
  • Patent number: 5047888
    Abstract: A magnetic sheet control member, for use in a device for recording and reproduction using a magnetic head in sliding contact with a rotary flexible magnetic sheet, to guide the magnetic sheet to the magnetic head by a negative pressure, having upstream-side and downstream-side inclined surfaces disposed respectively at the upstream side and the downstream side with respect to the rotation direction of the magnetic sheet and inclined to become more distant from the free rotary surface plane of the magnetic sheet towards the downstream side, and stabilizing surfaces disposed respectively at the outer side and inner side with respect to the radial direction of the magnetic sheet to connect the upstream-side inclined surface and the downstream-side inclined surface, thereby obtaining a stable head contact over the entire recording area from the innermost side to the outermost side of the magnetic sheet.
    Type: Grant
    Filed: December 27, 1989
    Date of Patent: September 10, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Daisuke Mitsuhashi, Shigeru Ando, Nishiyama Tomoyuki
  • Patent number: 5047884
    Abstract: A magnetic head having a control portion provided integrally with an opposing surface located opposing the recording surface of a magnetic disc or a head mount for generating a negative pressure between the control portion and the magnetic disc to attract the magnetic disc towards the magnetic head, thereby generating an adequate and sufficient negative pressure in the vicinity of the magnetic head and achieving a good head touch. This configuration enables compact design of the mechanism and an increased recording area of the magnetic disc compared with the case in which a magnetic head and a negative pressure generation type stabilizing plate to attract the magnetic disc towards the magnetic head are separately disposed, and eliminates the need for procedures for separate positioning of the individual magnetic head and stabilizing plate, thereby achieving a considerable reduction in manufacturing steps and production cost.
    Type: Grant
    Filed: January 5, 1990
    Date of Patent: September 10, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kenji Negishi, Daisuke Mitsuhashi, Yoshiaki Kato, Akira Takimoto, Noboru Kawasaki
  • Patent number: 4910629
    Abstract: In order to attain a good contact with a magnetic sheet, a magnetic head with a pair of magnetic gaps has an external configuration and a sliding surface which satisfy formulas of:0.2<W.sub.R /W.sub.T <0.8,-0.2W.sub.T W.sub.C +0.9<W.sub.R W.sub.T <-0.17W.sub.T W.sub.C +1.2, and1.5<R.sub.W /R.sub.R <4.4,where W.sub.R and W.sub.T are lengths of the magnetic head in a rotational direction and in a track-width direction of the magnetic sheet, respectively, W.sub.C is a distance between the magnetic gaps and R.sub.W and R.sub.R are radii of curvatures of the sliding surface in the track-width direction and in the rotational direction, respectively.
    Type: Grant
    Filed: October 3, 1988
    Date of Patent: March 20, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Daisuke Mitsuhashi, Noboru Komori
  • Patent number: 4731920
    Abstract: A method and a structure for mounting to a head carriage a magnetic head applicable to a magnetic recorder or reproducer in an electronic camera system wherein an object is electronically photographed and recorded into a rotating magnetic disc and an image is reproduced by a television system or a printer. In the method and structure, a pin is inserted through a through-bore in a head mount plate and is then brought into abutment with the head carriage. Adhesives are applied to clearances between the pin and the through-bore of the head mount plate as well as between the pin and the abutment surface of the head carriage to fill them up. In the method and structure, since the head mount plate is adhesively attached to the head carriage via the pin, the resultant adhesive layers are reduced in thickness, thereby preventing the magnetic head from shifting out of position when the adhesives are hardened.
    Type: Grant
    Filed: June 23, 1986
    Date of Patent: March 22, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasunori Nishijima, Daisuke Mitsuhashi, Takao Miyazaki, Kenji Negishi