US PATENT SUBCLASS 209 / 397-- .~.~.~ Perforated sheet

US PATENT SUBCLASS 209 / 397
.~.~.~ Perforated sheet

Current as of: June, 1999
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209 /	HD	CLASSIFYING, SEPARATING, AND ASSORTING SOLIDS

233	DF	SIFTING {16}
363	DF	.~ Elements {7}
392	DF	.~.~ Dress {4}
397		.~.~.~ Perforated sheet {2}
398	DF	.~.~.~.~> Adjusting
399	DF	.~.~.~.~> Attaching

DEFINITION

Classification: 209/397

(under subclass 392) Sifting passages which are formed through integral sheets of material.

(1) Note. Sheets of woven fabric may be included provided the passages are formed by perforation of the fabric and not by spacing of the intermeshing threads, wires, or bars.

SEE OR SEARCH CLASS

428, Stock Material or Miscellaneous Articles,

131+, for a stock material product in the form of a single or plural layer web or sheet embodying a component which is apertured, and is not elsewhere provided for.