Weft propelling grippers for textile looms
AssigneeNuovo Pignone S.p.A.
InventorLuciano Corain
Life of this patent
Estimating the term…
Abstract
Weft inserting and withdrawing grippers for a shuttleless weaving machine are disclosed, wherein the weft inserting gripper has a clamping member composed of pivoting blade-type foot biased by a spring and mounted in such a way that the foot bears against a horizontal gripping surface at an angle nearly equal to the complementary of the angle of friction between the yarn and the gripping surface. The gripping member of the withdrawing gripper has a hook with a wedge which can be axially slid towards and away from the hook to seize and hold the thread, or to clear it. The axial sliding motion of the wedge is controlled by a linkage which is resiliently biased by a spring.
Claims5
Weft inserting and withdrawing grippers for a shuttleless loom, each comprising a gripper body provided with weft yarn gripping and clamping members, characterised in that said weft yarn gripping and clamping members of the weft inserting gripper are constituted by a vertical blade-type foot which is hinged upperly to a rotation pivot supported by the inserting gripper body and disposed parallel to an underlying horizontal gripping surface, and cooperates with said gripping surface present longitudinally on the outer side of the inserting gripper, said blade-type foot having a height greater than the distance of said rotation pivot from said gripping surface, and such as to cause it to form with the gripping surface an angle approximately equal to the complementary of the angle of friction between the yarn and gripping surface, and being kept resting against said gripping surface and inclined outwards from the outer side of the inserting gripper by means of a thrust spring which is supported by the inserting gripper body and presses against its inclined face, and an arcuate deflector for the weft yarn, which descends inside the inserting gripper body until it reaches the level of said horizontal gripping surface.
Dependencies are inferred from the claim text.