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US 6,572,084 B1Granted
Method for production of foam and device for realizing the same
AssigneeDrobyshev Vyacheslav Ivanovich
InventorsDrobyshev Vyacheslav Ivanovich, Kadushin Pavel Nikolaevich
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Abstract
A homogeneous foam is obtained by providing a plate formed with numerous capillary tubes which divide a gas stream into elementary gas components spaced equidistantly from one another upon entering a foaming composition. The gas stream is controllably interrupted to obtain a succession of gas doses supplied to the plate in a time and pressure-controlled manner; the plate is controllably displaced to allow gas bubbles to separate from the plate between consecutive gas doses.
Claims12
A method for making a foam comprising the steps of:
- (a) periodically interrupting a gas stream flowing along a path toward a vessel which is filled with a foaming composition and provided with a perforated partition, thereby forming a succession of pulsed gas doses;
- (b) dividing each of the gas doses upon encountering the perforated partition into numerous elementary gas components entering the foaming composition to form equidistantly spaced apart gas bubbles;
- (c) displacing the perforated partition perpendicular to the path of the gas stream between consecutive gas doses to separate the gas bubbles from the perforated partition, thereby forming a plurality of uniformly dimensioned gas bubles in the foam;
- and
- (d) repeating steps (b) and (c).
2 more elements
An apparatus for making foam comprising:
- a source of gas streaming along a path;
- a vessel downstream from the source of gas;
- a valve between the source of gas and vessel periodically interrupting the gas stream to provide a succession of gas doses pulsed toward the vessel along the path;
- a perforated partition mounted in the vessel and provided with a plurality of capillary throughgoing tubes spaced from one another at a regular distance and having a uniform cross-section to divide each of the gas doses into gas components entering a foaming composition downstream from the partition to form evenly spaced apart gas bubbles;
- and
- an actuator reciprocally displacing the perforated partition perpendicular to the path between consecutive gas doses to separate gas bubbles from a surface of the partition, so that the separated gas bubbles have the same dimensions.
3 more elements
Dependencies are inferred from the claim text.