US PATENT SUBCLASS 428 / 373
.~.~ Bicomponent, conjugate, composite or collateral fibers or filaments (i.e., coextruded sheath-core or side-by-side type)

Current as of: June, 1999
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428 /   HD   STOCK MATERIAL OR MISCELLANEOUS ARTICLES

357  DF  COATED OR STRUCTUALLY DEFINED FLAKE, PARTICLE, CELL, STRAND, STRAND PORTION, ROD, FILAMENT, MACROSCOPIC FIBER OR MASS THEREOF {5}
364  DF  .~ Rod, strand, filament or fiber {9}
373.~.~ Bicomponent, conjugate, composite or collateral fibers or filaments (i.e., coextruded sheath-core or side-by-side type) {1}
374  DF  .~.~.~> Fibers or filaments nonconcentric (e.g., side-by-side or eccentric, etc.)

DEFINITION

Classification: 428/373

(under subclass 364) Product comprising a plurality of fibers or filaments which have been simultaneously formed by being forced through separate openings in a die or spinneret, and in which (1) the individual fibers or filaments are side-by-side with a connecting web therebetween or (2) one fiber or filament is substantially enclosed in the other (sheath-core type).

(1) Note. The fibers are usually of different composition so that on cooling or heating the crimp or nonlinearity may be controlled due to the differing rates of expansion or contraction.

SEE OR SEARCH THIS CLASS, SUBCLASS:

370, for a composite, bifilar, conjugate or collateral fiber or filament whose longitudinal axis follows a curvilinear or multidirectional path (e.g., helical, crimped, etc.).