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. 17, 1999
Filed:
Apr. 16, 1997
Applicant:
Inventors:
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
399-9 ;
Abstract
An image forming system provided with a printer engine and a controller which communicates with the printer engine over a serial communication interface. The controller receives a condition change signal from the printer engine over a dedicated signal line, which is outputted by the printer when the condition of the printer engine changes. The identity of the condition that has changed is then communicated over the serial communication interface. Further, the controller designates one of a plurality of kinds of condition changes, in response to which the condition change signal is outputted, according to the conditions of the controller or the image forming system.