US 4,541,235 A · Method and device for starting the operation of a friction-spinning unit

Abstract

A method of starting the operation of a friction spinning unit having friction surfaces displaceable in opposite directions and forming a spinning wedge, the spinning unit further having a fiber infeeding device, a thread take-up device for drawing a thread longitudinally through the spinning wedge, and at least one suction device acting upon the spinning wedge, at least one of the friction surfaces being formed by a sieve drum, the suction device having a suction nozzle acting upon the spinning wedge by sucking air through the wall of the sieve drum, by means of an automatic thread joining device, includes: (a) laying a thread into the spinning wedge; (b) initiating the infeed of spinning fibers into the spinning wedge; (c) connecting the friction surfaces with a thread-joining drive arrangement, and moving the friction surfaces in opposite directions with increasing speed; (d) continuously withdrawing the thread from the spinning wedge, and conducting it to a waste collector; (e) interrupting the travelling thread at the time when it is presumably free of undesirable thick and thin portions; and (f) conducting the thread end newly formed by the interruption to a thread collection location.

Claims10

Dependent claims

Method of starting the operation of a friction spinning unit having friction surfaces displaceable in opposite directions and forming a spinning wedge, the spinning unit further having a fiber infeeding device, a thread take-up device for drawing a thread longitudinally through the spinning wedge, and at least one suction device acting upon the spinning wedge, at least one of the friction surfaces being formed by a sieve drum, the suction device having a suction nozzle acting upon the spinning wedge by sucking air through the wall of the sieve drum, which comprises, by means of an automatic thread joining device:

(a) laying a thread into the spinning wedge;
(b) initiating the infeed of spinning fibers into the spinning wedge;
(c) connecting the friction surfaces with a thread-joining drive arrangement, and moving the friction surfaces in opposite directions with increasing speed;
(d) continuously withdrawing the thread from the spinning wedge, and conducting it to a waste collector;
(e) interrupting the travelling thread at the time when it is presumably free of undesirable thick and thin portions;
and
(f) conducting the thread end newly formed by the interruption to a thread collection location.

4 more elements

Device for performing a method of starting the operation of a friction spinning unit having friction surfaces displaceable in opposing directions and forming a spinning wedge, the spinning unit further having a fiber supply device, a thread take-up device for drawing the thread longitudinally through the spinning wedge, and at least one suction device acting upon the spinning wedge, at least one of the friction surfaces being formed by a sieve drum, the suction device having a suction nozzle acting upon the spinning wedge by sucking air through the wall of the sieve drum, the friction spinning unit being in combination with a thread joining device comprising:

(a) means for laying a thread into the spinning wedge;
(b) means for driving the friction surfaces duing a thread joining operation;
(c) first control means for drawing-off the thread during the thread joining operation;
(d) second control means for feeding spinning fibers into the spinning wedge during the thread joining operation;
(e) a waste collector for the joined thread;
and
(f) means for conducting the thread to thread collecting means after cutting off a thread length connected with the joining location, and for returning the thread to the friction spinning unit and into normal spinning position.

4 more elements

Dependencies are inferred from the claim text.

Method and device for starting the operation of a friction-spinning unit

Life of this patent

Method and device for starting the operation of a friction-spinning unit

Life of this patent

Abstract

Claims10