Web tensioning system

Details Web tensioning system Web tensioning system

B - Operations, Transporting

65

H

242/9

B65H 23/00 (2006.01) B65H 23/18 (2006.01)

Patent

CA 1154001

WEB TENSIONING SYSTEM ABSTRACT OF THE DISCLOSURE A system is described for holding the tension of a web substantially constant as the web is transported from a supply spool to a take-up spool. The rotation of each spool is controlled by a motor. A tension control circuit senses the currents in both motors and alters motor current so as to hold the sum of the motor currents at a substantially constant value. In this manner, the sum of the torques generated by the motors and their spools is held at a substantially constant value to thereby maintain web tension substantially constant as the radii of the spools change during web movement.

386607

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