Process and device for applying a flowable substance to a surface
OwnerJohannes Zimmerinventor
Life of this patent
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Abstract
In a process and a device for the impregnating and/or coating application of liquid, optionally foamed substances, through a slot the parts of the device performing the application are arranged to form a surface almost plan-parallel to the surface of the sheet material to be subjected to the application so that the trailing end of the application device is supported by the sheet material. Between the application device and the surface to be coated, a hydraulic pressure is generated which floatingly supports the device and which has a uniformizing effect on the application layer.
Claims17
A process for applying a flowable substance to a surface, comprising the steps of:
- (a) displacing a surface to which a flowable substance is to be applied in a predetermined direction;
- (b) juxtaposing said surface with an applicator having a slot opening toward said surface, and a broad face confronting said surface and extending generally along said surface from an edge of said slot in said direction to a trailing end portion of said applicator;
- (c) floatingly supporting said applicator relative to said surface so that hydrostatic pressure on said broad face tends to urge said applicator away from said surface, while biasing said applicator toward said surface, said surface and said broad face being so shaped that said trailing end portion can move toward said surface;
- and
- (d) forcibly feeding said flowable substance through said slot onto said surface so that the amount of said substance applied to said surface is controlled only by the rate at which the substance is forced through said slot and the hydrostatic pressure of said substance between said face and said surface is sufficient to hold said applicator out of contact with said surface except for said trailing end portion which is supported by said surface.
An apparatus for applying a flowable substance to a surface, comprising:
- means for displacing a surface to which a flowable substance is to be applied in a predetermined direction;
- an applicator juxtaposed with said surface and formed with a slot opening toward said surface, and a broad face confronting said surface and extending generally along said surface from an edge of said slot in said direction to a trailing end portion of said applicator;
- means for floatingly supporting said applicator relative to said surface so that hydrostatic pressure on said broad face tends to urge said applicator away from said surface, while biasing said applicator toward said surface;
- and
- means for forcibly feeding said flowable substance through said slot onto said surface so that the amount of said substance applied to said surface is controlled only by the rate at which the substance is forced through said slot and the hydrostatic pressure of said substance between said face and said surface is sufficient to hold said applicator out of contact with said surface except for said trailing end portion which is supported by said surface, said means for floatingly supporting said applicator relative to said surface being so constructed and arranged that said applicator is biased by its own weight against said surface.
Dependencies are inferred from the claim text.