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:
Apr. 28, 1992
Filed:
Mar. 29, 1990
Applicant:
Inventors:
Toshiro Suemune, Tokyo, JP;
Shigeru Takebu, Tokyo, JP;
Assignee:
Oki Electric Industry Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41J / ;
U.S. Cl.
CPC ...
400 54 ; 400 74 ; 318434 ; 361 23 ;
Abstract
In a protective circuit for a printer driver energized from a drive power supply, and associated with a control circuit for controlling the current supply to the printer driver, and connected to a power supply, a first circuit detects a malfunction of the control circuit with a first predetermined time T1 and resets the control circuit, and a second circuit detects a breakdown of the motor drive transistor with a second predetermined time T2 longer than the first predetermined time, and interrupts an input power supply.