(under the class definition) Apparatus comprising means to confine, compress or change the shape of material by closing or contracting an open or too-large form or the like about the material in a direction normal to the material's direction of movement or flow, whereby expansion if any is permitted longitudinally of the said flow path.
(1) Note. This operation normally affects the entire supply or charge and is basically the transformance of a supply holder which is open or enlarged for convenience in refilling into a closed or confined flow path corresponding to the shape and/or size of the receiver, the shaping or compressing, if any, depending on the nature of the material in the charge.
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81, for apparatus including means for contracting a trap to form a compacted charge, the trap being of the solid trap type.