Method For Suppressing Electrical Discharges Between A Web Exiting An Unwinding Roll And A First Conveyance Roller
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United States of America Patent
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Issued Date -
Apr 3, 2014
app pub date -
Oct 2, 2012
filing date -
Oct 2, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
When neutralizing the static charges on both sides of a web exiting an unwinding roll, the inside surface of the web may carry a high level of static charge from the unwinding roll to the first conveyance roller. An electrical discharge between the charged inside surface of the web and the first conveyance roller may damage a sensitive, high value coating or layer on the inside surface of the web. Disclosed is a method for suppressing an electrical discharge between the charged inside surface of a web exiting an unwinding roll and a first conveyance roller. The method comprises neutralizing static charges on the outside surface of the unwinding roll using a static dissipater, separating the web from the roll at an unwinding nip, neutralizing a first portion of the static charges on the inside surface of the web to suppress electrical discharges between the web and the first conveyance roller using a static dissipater located near web just before the web touches the first conveyance roller, and neutralizing the remaining second portion of the static charges on the inside surface of the web after the web has exited the first conveyance roller.
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