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. 01, 1989
Filed:
Nov. 24, 1987
Richard A Bettendorf, Oklahoma City, OK (US);
Scott S Morris, Oklahoma City, OK (US);
Honeywell Bull Inc., Minneapolis, MN (US);
Abstract
Motor control apparatus is described that is used in a printer that prints on a paper web coming from a roll of paper and has two-sided printing capability using two print mechanisms. The motor control apparatus controls power to several DC motors that either move the paper web from a roll through the printer or provide back tension to the paper web. The control circuits sense paper travel speed and motor loading and thereby sense the effects on paper tension caused by others of the control circuits. The interaction of motor torques provided by the control circuits maintains constant tension on the paper web throughout the printer and thereby assures that there is front to back printing registration on each two-sided printed sheet, and also assures that there is top to bottom centering registration of printing on each sheet of paper when the paper web is cut into individual sheets of paper.