Spindle for spinning frame or twisting machine
AssigneeHowa Kogyo Kabushiki Kaisha
InventorsKunio Shinkai, Yutaka Tanaka
Life of this patent
Estimating the term…
Abstract
The present invention relates to a spindle for a spinning frame or a twisting frame by which a tail yarn is formed on a full bobbin and is taken out from the full bobbin at a cop changing operation and is assuredly held on the spindle. In the spindle of the present invention, a band-like yarn-hanging member is arranged on the peripheral face of an intermediate part of a bobbin-attaching portion of the spindle and the band-like yarn-hanging member catches and holds the yarn wound in the form of a loop attached to the spindle at the cop changing operation.
Claims7
An apparatus for automatically doffing a full bobbin of wound yarn and donning an empty bobbin on a spindle in place of said doffed full bobbin in a spinning frame, comprising means for doffing said full bobbin and donning said empty bobbin, and means for cutting a tail winding extending between said spindle and said doffed full bobbin, and said spindle including a yarn holding means for holding a loop-wound yarn portion connected to said tail winding such that said loop-wound yarn remains attached to said spindle after said tail winding is cut, and said yarn holding means being a raised fabric comprising a narrow band-liked substrate and many needle-like or loopy piles formed on the surface thereof, and arranged on the peripheral face of an intermediate part of a bobbin-attaching portion of the spindle, wherein each bobbin includes means for disengaging said loop-wound yarn during doffing of said full bobbin, said disengaging means being a raised fabric formed in a state of inclining upward and arranged along about half of the inner circumference of each bobbin.
A method for automatically doffing a full bobbin of wound yarn and donning an empty bobbin on a spindle in place of said doffed full bobbin in a spinning frame, said spinning frame including bobbin doffing and donning means and tail yarn cutting means, and said spindle have a yarn holding means mounted thereon and constituted with a raised fabric, comprising the steps of:
- (a) performing a barrel winding in which a yarn is wound in a loop-like shape on a circumference of the full bobbin and a tail winding in which the yarn is successively wound in a ring-like shape on a circumference of a lowermost portion of the full bobbin to make a tail yarn by a rotation of the spindle and moving downward a spindle rail of said spinning frame while said spinning frame is running;
- (b) stopping said spinning frame;
- (c) looping said tail yarn of said wound yarn around said spindle to form a loop-wound yarn as said full bobbin is being doffed such that said tail yarn catches on the raised fabric of said yarn holding means during looping;
- (d) cutting said tail yarn in a substantially tension-free state by contacting and activating said tail yarn cutting means on a portion of said tail yarn arranged between the spindle and the full bobbin;
- (e) donning said empty bobbin by coupling said bobbin doffing and donning means to said empty bobbin, so that said tail yarn wound around said spindle is nipped between said spindle and an inside face of a bottom end portion of said empty bobbin, and
- (f) disengaging said loop-wound yarn from said yarn holding means by catching said loop-wound yarn on a raised fabric attached to an inner circumferential face of said full bobbin.
An apparatus for automatically doffing a full bobbin of wound yarn and donning an empty bobbin on a spindle in place of said doffed full bobbin in a spinning frame, comprising means for doffing said full bobbin and donning said empty bobbin, and means for cutting a tail winding extending between said spindle and said doffed full bobbin, and said spindle including a yarn holding means for holding a loop-wound yarn portion connected to said tail winding such that said loop-wound yarn remains attached to said spindle after said tail winding is cut, and said yarn holding means being a raised fabric comprising a narrow band-like substrate and many needle-like or loopy piles formed on the surface thereof, and arranged on the peripheral face of an intermediate part of a bobbin-attaching portion of the spindle, wherein each bobbin includes means for disengaging said loop-wound yarn during doffing of said full bobbin, said disengaging means being arranged along an inner circumference of each bobbin and comprising a raised fabric.
Dependencies are inferred from the claim text.