Patent ID: 7497099

Claim:
An ultrasonic washing method for clothes etc., said method comprising the steps of: storing clothes etc. in a plurality of kinds of washing baskets by being sorted; removing gases such as air contained in clearances in the clothes etc. by charging each of the washing baskets into a pre-processing chamber through an inlet portion in a side surface of the pre-processing chamber and evacuating the pre-processing chamber, and then introducing deaerated washing fluid into the pre-processing chamber; transferring the washing basket in the pre-processing chamber into a washing chamber through an outlet portion in a side surface of the pre-processing chamber, a shutter mechanism, and an inlet portion in a side surface of the washing chamber; then accomplishing deaeration while the washing fluid in the washing chamber is circulated, and at the same time, performing ultrasonic washing; and transferring the washing basket in the washing chamber into a post-processing chamber through an outlet portion in a side surface of the washing chamber, a shutter mechanism, and an inlet portion in a side surface of the post-processing chamber to perform draining, characterized in that each of the shutter mechanisms is provided with a packing member and a shield member, which are capable of allowing the washing basket to pass through while shutting off the flow of washing fluid and air.