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:
Mar. 17, 1981
Filed:
Oct. 04, 1978
Shigehiro Komori, Yokohama, JP;
Hajime Katayama, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A copying machine capable of making a copy of a selected area of a document, which is provided with a mechanism for setting the base line for copying a document placed on the original table as desired and for aligning the edge of copying material with the selected base line. The base line for copying is selectively determined by moving an indicator and when the moving optical system of the copying machine reaches the selected base line, an imagewise exposure is started. In timing with the exposure, feeding of copying material is also started. The lens of the optical system is moved by a distance determined by the distance which the indicator has moved to select the base line and the edge of the copying material is brought in alignment with the base line. To prevent the unnecessary area of the document from being copied, the area of photosensitive medium corresponding to the unnecessary area is exclusively exposed to light so as to erase the electrostatic latent image on this area.