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A SERVO SYSTEM FOR MAINTAINING CONSTANT TENSION ON A WEB

IP.com Disclosure Number: IPCOM000023562D
Original Publication Date: 1978-Feb-28
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 264K

Publishing Venue

Xerox Disclosure Journal

Abstract

Apparatus for maintaining constant tension on a web 12 during movement thereof, e.g., during positioning original documents in an exposure station 14 of a reproduction machine. The web is coupled between a take up reel 137' and a supply reel 137, with each reel being driven by an electric motor. The two motors are energized by a signal from the same source 200, except that the signal D applied to the supply reel motor is the derivative of that signal VP applied to the take up reel motor. In such manner, the supply reel 137 is energized during periods of acceleration or deceleration of the web 12 thereby maintaining constant tension on the web during positioning.

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XEROX DISCLOSURE JOURNAL

A SERVO SYSTEM FOR MAINTAINING
CONSTANT TENSION ON A WEB
Guillerrno F. Luzio

Proposed Classification
U.S. Cl. 242/182
mt. Cl. Gllb 15/58

Apparatus for maintaining constant tension on a web 12 during
movement thereof, e.g., during positioning original documents
in an exposure station 14 of a reproduction machine. The web
is coupled between a take up reel 137' and a supply reel 137,
with each reel being driven by an electric motor. The two
motors are energized by a signal from the same source 200,
except that the signal D applied to the supply reel motor is
the derivative of that signal VP applied to the take up reel
motor. In such manner, the supply reel 137 is energized
during periods of acceleration or deceleration of the web 12
thereby maintaining constant tension on the web during
positioning.

Volume 3 Number 1 January/February 1978 31

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                  XEROX DISCLOSURE JOURNAL
32 volume 3 Number 1 January/FebruarY 1978

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