Patents by Inventor Satoru Yoneda

Satoru Yoneda 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: 5671473
    Abstract: A fusing device has a pair of fusing rollers of which at least one is covered by an elastically deformable layer of heat resistant material with the fusing rollers being brought into contact with each other; a recording material guide member and a pre-heating member having a plane-shaped heating surface opposite to the recording material guide member on an upstream side recording material which maintains a toner image away of a nip portion where the fusing roller make contact. While the recording material which maintains the toner image is guided on said recording material guide member, the toner image is heated by means of the pre-heating member and passed through the nip portion. The fusing device is set to satisfy the relationship of 0<F<0.5.theta..sup.2 +0.05.theta. for an angle .theta.(.degree.
    Type: Grant
    Filed: May 30, 1996
    Date of Patent: September 23, 1997
    Assignee: Minolta Co., Ltd.
    Inventors: Takashi Yamada, Mitsuru Isogai, Tetsuya Yamada, Satoru Yoneda
  • Patent number: 5666623
    Abstract: A fusing belt type heat fusing device has a rotating fusing roller, a driven heating roller, an endless fusing belt wrapped and stretched around the two rollers, a pressure roller that applies pressure to the fusing roller through the fusing belt, and a separation agent application and tension transmission element that applies an offset suppression separation agent to the fusing belt in addition to transmitting tension to the fusing belt. The separation agent application and tension transmission element is installed so as to make contact with the fusing belt at an upstream side of the heating roller in the rotation direction of the fusing belt between the fusing roller and the heating roller and at a position closer to the heating roller than a center position between the fusing roller and the heating roller.
    Type: Grant
    Filed: May 29, 1996
    Date of Patent: September 9, 1997
    Assignee: Minolta Co., Ltd.
    Inventors: Tetsuya Yamada, Mitsuru Isogai, Takashi Yamada, Satoru Yoneda
  • Patent number: 5526103
    Abstract: An induction heating fixing device comprises a heat roller in which coil assemblies are disposed. The coil assemblies are aligned axially of the roller to produce magnetic flux in a direction orthogonal to the axis of the heat roller.
    Type: Grant
    Filed: March 30, 1995
    Date of Patent: June 11, 1996
    Assignee: Minolta Co., Ltd.
    Inventors: Takeshi Kato, Satoru Yoneda, Eiji Okabayashi, Peter Johnston, Hiroaki Hinotani, Tohru Fujiwara
  • Patent number: 5278586
    Abstract: An image forming apparatus having a rotatable image carrier, a first exposing device for forming an electrostatic latent image by irradiating an optical beam according to image data to the image carrier, a second exposing device to from another electrostatic latent image by irradiating an optical beam according to image data to the image carrier in a different irradiating position on the image carrier by the first exposing device, a developing device for developing the electrostatic latent images formed by the first exposing device and second exposing device, and a device for transferring the developed electrostatic images all together on the surface of a recording medium, has a device to form a first and a second pattern latent image on the image carrier by concurrently operating the first and the second exposing device while the image carrier is on the rotation at the first speed, a pattern detecting device for detecting the first and the second pattern latent image, a measuring device for measuring a time
    Type: Grant
    Filed: February 18, 1992
    Date of Patent: January 11, 1994
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Satoru Yoneda, Toshikazu Kawaguchi
  • Patent number: 5245462
    Abstract: A laser beam scanning apparatus having a laser beam generating section generating first and second laser beams, a rotatable polygonal mirror for deflecting the first and second laser beams to form scanning lines each extending in a main scanning direction on a beam receiving surface and an optical system for imaging the first and second laser beams deflected by the polygonal mirror on the beam receiving surface. Each of the first and second laser beams impinges on the reflective face of the polygonal mirror at an angle with respect to an optical axis in a sub-scanning direction perpendicular to the main scanning direction. The following condition is satisfied:.vertline..beta..times.tan.theta.a.vertline..ltoreq.(5/3).times.Pi.vertline..beta..times.tan.theta.b.vertline..ltoreq.(5/3).times.Pi.vertline..theta.a.vertline.+.vertline..theta.b.vertline..gtoreq..vertline. .psi.a.vertline.+.vertline..psi.b.vertline.where .beta. is a magnification of the optical system in the sub-scanning direction, .theta.a and .theta.
    Type: Grant
    Filed: November 17, 1992
    Date of Patent: September 14, 1993
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Nobuo Kanai, Toshikazu Kawaguchi, Satoru Yoneda