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:
Jul. 18, 1978
Filed:
Dec. 31, 1975
Yutaka Irie, Toyokawa, JP;
Tomoji Murata, Toyokawa, JP;
Kenji Shibazaki, Aichi, JP;
Shigemitu Shimizu, Toyokawa, JP;
Yukio Tokura, Toyohashi, JP;
Shunji Yamamoto, Shinshiro, JP;
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Abstract
An electrophotographic copying apparatus incorporating therein an improved developing material supplying device which supplying device includes a copy paper detecting unit for detecting the length of the copy paper, an integrating circuit for integrating the length of the copy paper detected by the detecting unit and a supply tank driving unit which operates the supply tank to supply a concentrated developing material into the developing tank through a valve, upon receipt of a signal from the integrating circuit, by which arrangement, the concentrated developing material can be supplied to the developing tank every time after a predetermined length of the copy paper is fed through the developing tank.