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:
May. 10, 1988
Filed:
Sep. 21, 1987
Applicant:
Inventor:
Andrew S Katayama, San Diego, CA (US);
Assignee:
Eastman Kodak Company, Rochester, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65H / ; G11B / ;
U.S. Cl.
CPC ...
318-7 ; 318138 ; 318254 ; 242 7551 ; 360 73 ;
Abstract
A reel to reel web transport apparatus includes an adaptive control which eliminates the necessity (1) for mechanical or vacuum web buffers, (2) for a capstan or tachometer to meter or control web velocity; and (3) for a tension transducer to control web tension. The web transport apparatus includes supply and takeup reels driven by brushless direct current (DC) motors. Hall device assemblies associated with the brushless DC motors provide Hall signals which are used during a learning mode to determine several unknown parameters for servo control of the web transport apparatus.