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. 25, 1982
Filed:
Mar. 06, 1980
Applicant:
Inventors:
Isamu Terashima, Hitachi, JP;
Masayoshi Sunada, Hitachi, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65B / ; G01G / ;
U.S. Cl.
CPC ...
141 94 ; 7343 / ; 141192 ; 222D / ; 355 / ;
Abstract
A developer quality monitoring device for monitoring the mixed state of toners and carriers in the developer used for developing a latent image formed on a recording medium, wherein a developer circulating mechanism and a toner density detector are used in common, an electrical signal representative of a decrement of toner density and a magnitude of pulsations is produced, and by using this electrical signal, decay condition of the developer is monitored and decay condition limit is discriminated.