(under subclass 97) Subject matter including means to regulate the direction of air blast.
SEE OR SEARCH CLASS
99, Foods and Beverages: Apparatus, for treating food by applying fluid,
525, which includes (a) dynamic means to forcibly propel gas to or from the device, or (b) static means to direct the flow of gas to or from the device, or both (a) and (b); subclass 527 which includes a relatively movable member that stops or varies the flow of gas through a gas entrance or gas exit.
