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:
Jun. 12, 1984
Filed:
Aug. 04, 1982
Hiroyuki Miyake, Inagi, JP;
Seiji Sagara, Kawasaki, JP;
Kazuo Kagiura, Tokyo, JP;
Nobukazu Sasaki, Tokyo, JP;
Takaji Yonemori, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A variable magnification copying apparatus capable of not only one-to-one magnification copying but also reduction copying, and particularly a variable magnification copying apparatus of the slit exposure scanning type which is capable of two or more types of reduction copying and which uses two movable mirrors and an in-mirror lens on the object side, characterized in that the optical axis of the in-mirror lens is set non-parallel to an original carriage to make the apparatus compact and during magnification change, the in-mirror lens and the second movable mirror are initially displaced by predetermined distances in predetermined directions, whereby the object point position and image point position of an image forming principal light ray on the original supporting surface and photosensitive surface are made fixed irrespective of the copying magnification.