US 4,965,912 A · Method and apparatus for severing the sliver in sliver coilers

Abstract

A sliver coiler for depositing a running sliver into a coiler can includes a driven roller pair including two cooperating rollers arranged for advancing the sliver passing therebetween in a feed direction; and a sliver trumpet supported upstream of the roller pair as viewed in the feed direction and having a passage through which the sliver runs. The sliver trumpet has a first position in which the sliver exit of the passage immediately adjoins and faces the roller pair of a second position in which the sliver exit is at a greater distance from the roller pair than in the first position. The coiler further has a coiler head arranged downstream of the roller pair and arranged for receiving the sliver and forwarding the sliver into a coiler can; a drive for displacing the sliver trumpet between the first and second positions; and a clamping arrangement for grasping the sliver at a location between the sliver entrance of the sliver trumpet and the roller pair. The clamping arrangement has a clamping position in which the sliver is grasped thereby and an open position in which the sliver is released.

Claims20

Dependent claims

A method of severing and rethreading a running sliver in a sliver coiler having a pair of rollers for advancing the sliver passing therebetween in a feed direction, a rotary coiler head situated downstream of the roller pair as viewed in the feed direction and receiving the sliver therefrom;

and a sliver trumpet situated upstream of the roller pair and having a sliver entrance and a sliver exit;
said sliver trumpet being arranged to guide the sliver to the roller pair as the sliver passes through the sliver trumpet;
comprising the following steps;
(a) rotating the rollers of the roller pair, thereby pulling the sliver from the sliver trumpet and advancing the sliver to the coiler head;
(b) during the performance of step (a), moving said sliver trumpet away from said roller pair thereby increasing the distance between the sliver trumpet and the roller pair;
(c) during the performance of step (a), firmly clamping the running sliver at a location between said sliver entrance of said sliver trumpet and said roller pair thereby causing a rupturing tension to build up in said sliver, resulting in severance thereof, whereby advancement of the sliver is interrupted;
(d) moving the sliver trumpet, together with a free end of the sliver, toward said roller pair to a position in which said roller pair grasps the free end of the sliver;
and
(e) unclamping the sliver, thereby permitting the roller pair to resume advancement of the sliver.

6 more elements

A sliver coiler for depositing a running sliver into a coiler can, comprising:

(a) a driven roller pair including two cooperating rollers arranged for advancing the sliver passing therebetween in a feed direction;
(b) a sliver trumpet supported upstream of said roller pair as viewed in the feed direction and having a passage through which the sliver runs;
said passage having a sliver entrance and a sliver exit;
said sliver trumpet having a first position in which said sliver exit immediately adjoins and faces said roller pair and a second position in which said sliver exit is at a greater distance from said roller pair than in said first position;
(c) a coiler head arranged downstream of said roller pair and being arranged for receiving the sliver and forwarding the sliver into a coiler can;
(d) moving means for displacing said sliver trumpet between said first and second positions;
and
(e) clamping means for grasping the sliver at a location between said sliver entrance of said sliver trumpet and said roller pair;
said clamping means having a clamping position in which the sliver is firmly grasped thereby and an open position in which the sliver is released from the clamping means.

6 more elements

Dependencies are inferred from the claim text.

Method and apparatus for severing the sliver in sliver coilers

Life of this patent

Method and apparatus for severing the sliver in sliver coilers

Life of this patent

Abstract

Claims20