Abrégé

Device (10) for stopping a rove supply in a spinning or twisting apparatus after breakage of a yarn (11) at the output side of a drafting zone (A) which comprises at least a pair of front rollers (3, 4) and a pair of back rollers (1, 2), whereby the rove (13) is delivered in normal operation by a pair of feed rollers from the input side and is formed to said yarn (11) in the drafting zone (A) and whereby the rove delivery is stopped upon breakage of the yarn (11), the stopping device (10) comprises a mechanical sensing lever (7) with a sensing pin (8) being repeatedly in contact with said yarn (11) and said sensing lever (7) is pivotally mounted on a pivot axis (X), wherein said sensing lever (7) has a release lever (9) opposite to said sensing lever (7) which is provided with a longitudinal release part (9a) being in engagement with a spring-loaded clamp device (12) such that in normal operation of the apparatus said clamp device (12) is open and closes after the break of the yarn (11) through the conjoint pivot movement of said sensing lever (7) and said release lever (9) about said pivot axis (X) to firmly clamp the rove (13) at the input side of said drafting zone (A) before said back rollers (1, 2).

Classes IPC  ?

• D01H 13/18 - Dispositifs avertisseurs ou de sécurité, p.ex. de détection automatique des défauts, mouvements d'arrêt sensibles à une réduction de la tension, à un manque d'alimentation, à une cassure de la matière arrêtant l'alimentation uniquement

Abrégé

Drafting device (10) for use in spinning machinery and for drafting discontinuous fibers, such as cotton, linen, wool, jute, ramie, hemp or man-made fibers, with a pair of feed rollers (2), a pair of draft rollers (3), a pair of control rollers (4) and a pair of delivery rollers (5), being arranged in this order in a rove feed direction (F) defining a drafting zone (D) composed of three sub-drafting zones (A, B, C), whereby the rollers (2, 3, 4) are driven at a respective predetermined speed in such a manner that a drafting action is exerted on the rove (1), wherein said control rollers (4) are both provided with an active drive mechanism and said control rollers (4) are mounted in a fixed but contact-free manner with a defined control gap (6) between them of a predetermined dimension.

Classes IPC  ?

• D01H 5/22 - Machines ou dispositifs d'étirage sans barrettes à aiguilles ni éléments similaires dans lesquels les fibres sont contrôlées uniquement par des cylindres
• D01H 5/44 - Réglage des éléments d'étirage, p.ex. modification de l'écartement des cylindres
• D01H 5/56 - Supports pour éléments d'étirage