Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1997-05-21
1999-03-09
Moore, Chris K.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
162272, D21G 900
Patent
active
058784624
ABSTRACT:
An apparatus for removing dust released, for instance, during the production of a soft crepe paper web which is creped off a Yankee cylinder and spread laterally. The apparatus comprises a dust suction box consisting of a housing with an inner suction chamber, said housing having a first inlet in the form of a suction gap, a main part and first and second parts which define said suction gap between them. According to the invention the main part is in the form of part of a cylinder to provide a corresponding curved inner side in the suction chamber, and the suction gap comprises an outer gradual throttling and an inner gradual enlargement, said throttling and enlargement merging at a transition where said throttling is maximal. The first inlet forming part preferably comprises a flat surface that defines its side of said enlargement whereas the second part forming the inlet comprises both a curved surface having a predetermined radius and such an arc length that it defines the whole of its side of the throttling and an initial part of the enlargement, and also an inner, flat surface extending at a tangent from the curved surface and forming an acute angle .alpha. with a tangent to the curved surface at said transition.
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Linden Anders Tommy
Myren Harry Ingemar
Onnerlov Lars-Erik
Moore Chris K.
Valmet-Karlstad AB
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