(57) An apparatus for crimping a tow of filaments (16) comprises a pair of cylindrical
feed rolls (10, 10) disposed to form a nip (A) therebetween and a stuffer box (12)
disposed adjacent to the nip (A), the stuffer box (12) including an inner wall portion
(14) confronting to a pair of coplanar end surfaces (18,18) of the feed rolls (10,
10) across said nip (A) with a slight clearance therebetween for frictional engagement
with the filaments (16) as the latter is moved in a region located immediately downstream
of the nip (A) and defined jointly by the inner wall portion (14) and respective peripheral
surfaces of the feed rolls (10, 10). The inner wall portion (14) is movable in a direction
substantially the same direction as the advance of the filaments (16) in the region
while renewing with respect to the frictional engagement with the filaments (16).
The tow crimping apparatus thus comstructed is durable and performs crimping operation
at a high-speed without producing hard lump due to fusion in the tow as the latter
is crimped.
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