Patents by Inventor Mitsuhiro Hirohata

Mitsuhiro Hirohata 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).

  • Flash lamp fixing device
    Patent number: 5448344
    Abstract: A flash lamp fixing with a simple structure, capable of obtaining an even distribution of high-level luminous energy over a large area on the surface of a paper sheet illuminated by a flash lamp. In the flash lamp fixing device, the half breadth L.sub.1 of the aperture of the reflector is set so as to satisfy the equation V/T.gtoreq.L.sub.1 .gtoreq.V/T-L.sub.2 /2, where V is the conveying speed of a paper sheet; T is the flash cycle of the flash lamp; L.sub.1 is the half breadth of the aperture of the reflector; and L.sub.2 is the length of an area in which fixing can be done by one flash of the flash lamp. Where .theta..sub.1 represents the included angle between a tangent which passes through one of aperture edges, being tangent to the flash lamp on the side of the aperture and the plane of the aperture; and .theta..sub.
    Type: Grant
    Filed: October 26, 1993
    Date of Patent: September 5, 1995
    Assignee: Fujitsu Limited
    Inventors: Tatsuya Itakura, Rika Nishiwaki, Tadayoshi Nakata, Shigehiro Fujii, Tomoaki Fukuda, Naoyuki Fujimoto, Mitsuhiro Hirohata, Yoshizi Atsumi