Deflection compensating device for a smoothing device for a coating applying unit
AssigneeJ. M. Voith GmbH
InventorHans-Peter Sollinger
Life of this patent
Estimating the term…
Abstract
The smoothing device has a support beam. The beam is compensated along its line of flexure by a support member arranged centrally in it and which corrects the flexure of the support beam, which is due to the effect of gravity thereon or to a lesser extent due to any counter acting force of the doctor supported on the beam. A tube surrounds and is spaced radially out from the support member. A plurality of hydraulically or pneumatically actuated pressing elements are disposed between the tube and inside of the beam and extend over the length of the beam and are pressurized to support the beam.
Claims20
A smoothing device for a unit that applies a coating to a moving web of material, the smoothing device comprising:
- a support beam which extends in its length direction across the web;
- a doctor for the coating material extending toward the web and extending across the direction of the web;
- holding means to which the doctor is supported, and the holding means being supported on the support beam and extending along the support beam for supporting the doctor, whereby the force applied to the doctor by the web is transmitted through the holding means to the beam;
- a central support member disposed in the beam and extending axially along the length thereof;
- an external tube around the central support member and radially spaced therefrom;
- means connecting the support beam to the external tube, whereby the external tube supports the beam;
- at least two rows of pressure medium activated pressing elements which are arranged parallel to the axis of the beam and extending along the beam disposed between the support member and the external tube and being actuatable for supporting the external tube for in turn supporting the beam against undesired flexion;
- wherein the pressing elements comprise a plurality of pressure holes, each adapted to expand upon being pressurized;
- and
- wherein the pressing hoses are paired, and further comprising means for pressurizing the pressing hoses which pressurizes them in their pairs, wherein each pair comprises a respective pair of opposite pressing hoses.
Dependencies are inferred from the claim text.