The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 10, 1996
Filed:
Mar. 20, 1995
Yutaka Hirai, Tokyo, JP;
Osamu Takamatsu, Atsugi, JP;
Katsunori Hatanaka, Yokohama, JP;
Masaru Nakayama, Atsugi, JP;
Hiroyasu Nose, Zama, JP;
Takayuki Yagi, Tokyo, JP;
Yasuhiro Shimida, Atsugi, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A parallel plane holding mechanism is constructed as follows. Beams are provided on the peripheral portion of a flat plate-shaped weight member. A base plate is provided so as to face the weight member. First and second electrodes are provided on both surfaces of the weight member and the base plate to face each other. A voltage is applied between the first electrode and the second electrode so that the distance between the weight member and the base plate is controlled to move the weight member to thereby hold a reference surface of the weight member to be parallel to a predetermined reference surface.