Roller driving process and apparatus
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United States of America Patent
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Jul 7, 1998
Grant Date -
N/A
app pub date -
May 2, 1997
filing date -
Jul 22, 1994
priority date (Note) -
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status (Latency Note)
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Abstract
A roller has a rotary hollow cylinder through which extends a non-rotary crosshead. The hollow cylinder is supported on the crosshead by two opposite rows of hydrostatic supporting elements. When the roller is operated at particularly low linear pressures in the roll gap, a uniform linear force over the whole width of the paper web is exerted in the row of supporting elements opposite to the roll gap, causing an increase in the hydraulic pressures required in the row of supporting elements that faces the roll gap, until said pressures reach a range in which perfect operation of the supporting elements is ensured.
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