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:
May. 24, 1988
Filed:
Jul. 17, 1986
Haruo Nishiyama, Kyoto, JP;
Masaru Tsuji, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
In a variable magnification copy machine in which a scanning velocity of a scanning device can be varied according to a designated magnification, and either a two revolution process or a three revolution process is utilized, there is provided a device for selecting the two revolution process when the equal magnification mode is selected and for switching from the two revolution process to the three revolution process when the enlargement mode is chosen. Even further, there are respective driving clutches corresponding to each of reduction, equal magnification and enlargement modes in which the copying speed is not slowed down in the enlargement mode by switching clutches upon returning the platen to a home position.