Underwinding-thread clamp for a ring-spinning or ring-twisting machine
AssigneeZinser Textilmaschinen GmbH
InventorsFriedrich Dinkelmann, Peter Mann
Life of this patent
Estimating the term…
Abstract
An underwinding thread clamp for a spindle of a ring spinning or ring-twisting machine has a clamping sleeve biased by a spring against and juxtaposed with a collar on the spindle. The juxtaposed surfaces of the spindle and collar have wavy contours so that, upon engagement of an actuating member with each collar, the latter is cammed into its open position to release the respective underwinding thread so that the latter, engaged when a full bobbin was removed, can be released. The clamping of the underwinding thread permits the thread to be wound on the newly mounted core sleeve.
Claims16
An underwinding thread clamp for a rotatable spindle of a ring-spinning machine or a ring-twisting machine and wherein said spindle is adapted to receive a yarn package which can be withdrawn from said spindle, said underwinding thread clamp comprising:
- a collar member on said spindle below said yarn package;
- a clamping sleeve member on said spindle axially juxtaposed with said collar member, said collar and clamping sleeve member clamping an underwinding thread between them following completion of winding of the yarn package and looping of the underwinding thread through less than 360.degree. below said yarn package, said clamping sleeve member being rotatable on said spindle and at least one of said collar and clamping sleeve members being axially shiftable on said spindle, said collar & clamping sleeve members having mutually juxtaposed surfaces with complementary and interfitting wave-shaped contour means for axially camming said collar & clamping sleeve members apart to release said underthread upon rotational braking of said clamping sleeve member relative to said spindle;
- and
- an actuatable device having braking means shiftable into engagement with said clamping sleeve member for braking rotation thereof relative to said collar member to effect camming of said members apart.
Dependencies are inferred from the claim text.