Winding – tensioning – or guiding – Tension control or brake – Supply controlled
Reexamination Certificate
2006-10-03
2006-10-03
Nguyen, John Q. (Department: 3654)
Winding, tensioning, or guiding
Tension control or brake
Supply controlled
C242S419300, C242S156100, C242S156200, C188S161000
Reexamination Certificate
active
07114674
ABSTRACT:
An idler roll brake in a paper handing machine wherein the roll brake employs a brake shoe mounted to the roll end bearing. The brake shoe slides forward to bring the brake shoe against the interior surface of the roll. An electromagnet positioned external to and mounted closely spaced from the cylindrical shell the roll attracts a ferromagnetic armature or permanent magnet mounted to the brake to pull the brake shoe into engagement with the inner surface of the roll.
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Scott B. Hughes, “Magnetic braking: Finding the effective length over which the eddy currents form”, Physics Department, The College of Wooster, Wooster, Ohio 44691, May 5, 2000.
Daul Michael J.
Fuchs Lawrence J.
Kim Sang
Metso Paper Inc.
Nguyen John Q.
Stiennon & Stiennon
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