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, 1989
Filed:
Apr. 13, 1987
Applicant:
Inventor:
David W Sutcliffe, Fremont, WY (US);
Assignee:
Micro Peripherals, San Diego, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J / ; B41J / ;
U.S. Cl.
CPC ...
400124 ; 101 9303 ; 361152 ; 4001573 ; 400166 ;
Abstract
A method and apparatus for energizing a printhead by maintaining substantially constant peak current in the actuator means of the printhead regardless of the duty cycle of the actuator means. The method and apparatus establishes a minimum time period for energizing the actuator means and a supplemental time period for energizing the actuator means in response to the determined duty cycle. The actuator means are then energized for an extended time period in dependence upon the minimum time period and the established supplemental time period to thereby maintain substantially constant peak current in the actuator means regardless of the duty cycle thereof.