Method and apparatus for precisely driving film material
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United States of America Patent
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Sep 6, 1994
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app pub date -
Jun 29, 1993
filing date -
Mar 5, 1991
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Abstract
A method and apparatus for precisely advancing film material between two rollers includes a driven roller having a medium hardness rubber surface and a non-driven hard surfaced roller which contacts precision surfaces at either end of the driven roller to accurately control the spacing between the two rollers. The non-driven roller is urged against the driven roller precision surfaces by a spring force, and causes the rubber of the driven roller to compress when film material is in an operative position between the roller pair.
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