US 4,969,607 A · Apparatus for introducing a yarn into the catch slot of an empty bobbin tube

Abstract

The apparatus for introducing a yarn or the like into the yarn catch slot of an empty bobbin tube during the changeover operation from a full bobbin to an empty bobbin at an automatic yarn winder, comprises a yarn deflector, formed of sheet metal for instance, which is provided with cutouts. Each cutout serves for deflecting an associated yarn out of an imaginary plane extending through a yarn ridge. In order to ensure that the yarn, which is still arriving at the yarn ridge of the full bobbin during the changeover operation can be infed within the imaginary plane through the yarn ridge and at the same time can extend in the plane through the yarn catch slot, the yarn is pulled by a displaceable yarn entrainment member over a curved portion of the associated cutout and deviated or deflected at the associated yarn entrainment hook.

Claims13

Dependent claims

An apparatus for introducing a yarn into a catch slot of an empty bobbin tube during a yarn changeover operation from a full bobbin to an empty bobbin at an automatic winder, comprising:

at least two bobbin spindles cantilever mounted at a turret;
a displaceable yarn guide means displaceable into a path of travel of an incoming yarn for forming a yarn ridge upon a surface of a full bobbin;
yarn deflector means moveable into the path of travel of the yarn between the full bobbin and an empty bobbin tube having a yarn catch slot;
said yarn deflector means being provided with a cutout;
a displaceable yarn entrainment member arranged laterally of said cutout of said yarn deflector means;
said cutout having a curved portion;
and
said displaceable yarn entrainment member serving for the axial displacement of the yarn along said curved portion of the cutout and across the catch slot at said empty bobbin tube while simultaneously maintaining the infeed of the yarn to said full bobbin.

5 more elements

An apparatus for yarn positioning during a yarn changeover operation from a full bobbin to an empty bobbin tube at an automatic winder, comprising:

two bobbin spindles which are mounted at said automatic winder and individually drivable;
said two bobbin spindles having a predetermined lengthwise axial direction;
the yarn changeover operation from a full bobbin to an empty bobbin tube respectively mounted at said two bobbin spindles being effected subsequent to formation of a full size yarn package at the full bobbin by winding an incoming yarn;
said empty bobbin tube having a yarn catch slot;
the incoming yarn to be wound at said empty bobbin tube being diverted from said full size yarn package to said yarn catch slot at said empty bobbin tube;
two separate means for yarn guidance are provided for diverting the incoming yarn from said full size yarn package to said yarn catch slot at said empty bobbin tube;
first yarn guidance means of said two separate means of yarn guidance being axially displaceable relative to said predetermined lengthwise axial direction of said two bobbin spindles;
second yarn guidance means of said two separate means for yarn guidance defining an arcuate-shaped curved path of yarn movement and containing yarn entrainment means;
displacement means provided for said second yarn guidance for relatively displacing said second yarn guidance means and said yarn entrainment means for pulling the incoming yarn across said arcuate-shaped curved path of yarn movement.

6 more elements

Dependencies are inferred from the claim text.

Apparatus for introducing a yarn into the catch slot of an empty bobbin tube

Life of this patent

Apparatus for introducing a yarn into the catch slot of an empty bobbin tube

Life of this patent

Abstract

Claims13