US PATENT SUBCLASS 414 / 200
.~.~.~ Including serially arranged closures

Current as of: June, 1999
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414 /   HD   MATERIAL OR ARTICLE HANDLING

147  DF  CHAMBER OF A TYPE UTILIZED FOR A HEATING FUNCTION AND MATERIAL CHARGING OR DISCHARGING MEANS THEREFOR {6}
160  DF  .~ Charging of chamber {7}
199  DF  .~.~ By material supporting structure movable, or having a movable component, to release material into chamber by gravity {4}
200.~.~.~ Including serially arranged closures {1}
201  DF  .~.~.~.~> At least one comprising bell of bell and hopper type supporting structure {2}

DEFINITION

Classification: 414/200

Including serially arranged closures:

(under subclass 199) Apparatus wherein the supporting structure includes two or more serially arranged closures (e.g., to inhibit change in pressure gradient), one of which releases the material into the chamber.

(1) Note. While it is necessary that each closure occupy a flow-path-blocking position during some portion of a chamber-charging cycle, it is not necessary that more than one closure be in such a position (i.e., a position in which it stops incoming material) during the period in which a charge is being accumulated for release into the chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:

169+, for a similar device in combination with a receptacle movable back and forth along an inclined way.