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:
Oct. 06, 1992
Filed:
Dec. 18, 1990
Katsunori Sakakibara, Fujisawa, JP;
Minolta Camera Co., Ltd., Osaka, JP;
Abstract
An image projection apparatus which projects an image of a microfilm onto a screen and copies the image. Among a plurality of projection lenses, which are zoom lenses having set-ups of magnifications in correspondence to the sizes of text images and copy paper, a lens with a set-up of the intended magnification is mounted selectively on the apparatus for the operation. When the lens is mounted, it is initialized to a reference magnification regardless of the magnification which has been set, and in this operation the zoom value is memorized. Subsequently, the lens is zoomed by the memorized zoom value in the opposite direction so that the magnification which has been set previously is restored.