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. 25, 1987
Filed:
May. 05, 1986
Applicant:
Inventor:
N Allen Cargill, Warminster, PA (US);
Assignee:
Technitrol, Inc., Philadelphia, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41F / ;
U.S. Cl.
CPC ...
101233 ; 101238 ; 101240 ;
Abstract
A document printer in which a print drum is driven by a direct current electric motor whose voltage is controlled by a first voltage regulator circuit for supplying a first voltage to the motor during a non-printing operating condition and a voltage boost circuit for supplying a higher voltage to the motor during a printing operating condition so that the same document feed rate is maintained throughout the operation of the device.