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:
Aug. 27, 1991
Filed:
Aug. 01, 1989
Hideshi Oushiden, Kawasaki, JP;
Norio Imada, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
An exposure amount for a document is adjusted by using three modes, i.e., a one-to-one magnification adjustment mode for adjusting an exposure amount for a document at a one-to-one magnification, an enlargement adjustment mode for adjusting an exposure amount for a document at a maximum magnification, and a reduction adjustment mode for adjusting an exposure amount for a document at a minimum magnification, and to control an exposure amount corresponding to a desired copy magnhification in accordance with the adjusted exposure amount. A fine adjustment mode is set through a ten-key pad of an operation panel. In this fine adjustment mode, a desired copy magnification is set between the one-to-one magnification and the maximum magnification by a magnification setting key. When an exposure amount at the set copy magnification is input through the ten-key pad, the input exposure amount is stored in a nonvolatile memory in accordance with the set copy magnification. If a copy operation is performed upon switching from the fine adjustment mode to a normal copy mode, data corresponding to the exposure amount stored in the nonvolatile memory is supplied to a lamp regulator. The exposure amount of an exposure lamp is then controlled by the lamp regulator.