Drying and gas or vapor contact with solids – Apparatus – Rotary drums or receptacles
Patent
1995-04-10
1996-05-28
Bennet, Henry A.
Drying and gas or vapor contact with solids
Apparatus
Rotary drums or receptacles
15345, 15 38, F26B 1102
Patent
active
055199453
ABSTRACT:
A method and apparatus for cleaning the surface of a backing roll in a coater or a calender roll. The roll is cleaned by injecting steam from a steam injection chamber against the roll surface at a 15.degree. angle counter to the rotational direction of the roll. Steam impinging on the surface performs effective removal of accumulated dirt and the detached dirt is carried away on the web without a deleterious effect on the quality of the web. Steam injected against the roll is vacuumed away from the roll surface via a suction chamber, whereby the cleaning steam is prevented from escaping to the surroundings.
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Ahvenniemi Vesa
Lappalainen Teuvo
Bennet Henry A.
Gravini Steve
Valmet Corporation
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