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. 17, 1991
Filed:
Jun. 22, 1990
Katsunori Sakakibara, Osaka, JP;
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Abstract
Disclosed is a microfilm reader/printer which projects a microfilm image onto a screen and which makes a copy in an enlarged or reduced state of the image suitable to a selected copying paper size. On the screen there are provided marks which indicate image ranges in printing with respect to both vertically long and laterally long images, and a projective magnification of a lens is adjusted so that the profile of the image projected on the screen conforms to the marks. In copying, a change is made automatically to a new projective magnification calculated in conformity with a selected copying paper size, and a copy is obtained at the new projective magnification. When a longitudinal direction of the image projected on the screen and that of copying paper are not coincident with each other, both can be rendered coincident with each other by rotating an image rotating prism disposed in a projective optical system. When the image rotating prism rotates, in order to prevent partial image loss caused by off-center rotation of the same prism, a change is made automatically to a projective magnification obtained by multiplying the projective magnification of the lens which has been calculated according to the selected copying paper size by a predetermined reduction rate, and the copy is made at the automatically-changed projective magnification.