Foaming method and apparatus therefor

Colloid systems and wetting agents; subcombinations thereof; pro – Continuous liquid or supercritical phase: colloid systems;... – Having discontinuous gas or vapor phase – e.g. – foam:

Reexamination Certificate

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C261S028000

Reexamination Certificate

active

07943672

ABSTRACT:
A gas mixing/supplying device and a method includes of introducing a gas into a high-viscosity material. The method the steps of effecting a first suction stroke in which the piston (25) is moved in the cylinder (27); supplying a high-viscosity material to the cylinder, using a suction force in the cylinder generated in said first suction stroke; stopping the piston after the first suction stroke; effecting a second suction stroke in which the piston is moved in the cylinder after the supply of the high-viscosity material; supplying a gas to the cylinder, using a suction force in the cylinder generated in the second suction stroke; effecting a pressurizing stroke in which the piston is moved in the cylinder after completion of the supply of the gas; and effecting a discharge stroke in which the high-viscosity material and the gas are discharged into a conduit. Then, the high-viscosity material is foamed under atmospheric pressure.

REFERENCES:
patent: 5984280 (1999-11-01), Okuda et al.
patent: 6538040 (2003-03-01), Okuda et al.
patent: 0 776 745 (1997-06-01), None
patent: 0 974 391 (2004-12-01), None
patent: 06-198152 (1992-12-01), None
patent: 06-198152 (1994-07-01), None
patent: 09-206638 (1997-08-01), None
patent: 10-272344 (1998-10-01), None
patent: 10-278118 (1998-10-01), None
Chinese Office Action dated Apr. 3, 2009 in corresponding Chinese patent application No. 2006800048447 together with its English translation.
Japanese Office Action (with English translation) issued Jan. 28, 2011 in corresponding Japanese Patent Application No. 2005-036033.

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