US 4,727,715 AGranted

Method and apparatus for starting spinning operation of an open end friction spinning aggregate

AssigneesFritz Stahlecker, Hans Stahlecker

InventorsWolfgang Feuchter, Wolfram Ilg, Johann Weber

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Abstract

A piecing process is provided for an open-end friction spinning apparatus of the type including movable friction surface members forming a yarn-forming zone therebetween. A friction surface driving device for moving the friction surface members during operation and for interrupting the movement of the friction surface members is also included in the apparatus. The spinning apparatus further includes a yarn end orientation member for orienting a yarn end during the piecing process. The process includes placing a yarn end into the yarn-forming zone when the rollers are stopped. The friction surface members are started such that the yarn end is prevented from being pulled too deeply into the yarn-forming zone by the yarn end orientation device. An apparatus for carrying out this process is also provided.

Claims25

Dependent claims

Piecing process for an open-end friction spinning apparatus of the type including:

movable friction surface means for forming yarn including a pair of friction rollers operating as said friction surface means forming a yarn-forming zone therebetween;
friction surface driving means for moving said friction surface means during operation and for interrupting the movement of said friction surface means, said friction surface driving means including roller driving means for driving one roller into the yarn-forming zone and for driving another roller out of the yarn-forming zone;
yarn end orientation means for orienting a yarn end during the piecing process;
said process comprising:
placing a yarn end into the yarn-forming zone when the friction surface means are stopped;
and
starting the friction surface means whereby said yarn end is prevented from being pulled too deeply into said yarn-forming zone by the yarn end orientation means, said starting of the friction surface means including using control means for preventing the roller rotating into the yarn-forming zone from starting prior to the starting of the roller rotating out of the yarn-forming zone.

4 more elements

Apparatus for open-end friction spinning comprising:

movable friction surface means for forming yarn including a pair of friction rollers operating as said friction surface means forming a yarn-forming zone therebetween;
friction surface driving means for moving said friction surface means during operation and for interrupting the movement of said friction surface means, said friction surface driving means including roller driving means for driving one roller into the yarn-forming zone and for driving another roller out of the yarn-forming zone, said driving means including a driving belt means, said driving belt means being movable between an operable position contacting said rollers and an interrupted position away from said rollers, said driving belt means contacting the roller rotating out of the yarn-forming zone before contacting the roller rotating into the yarn-forming when moved from said interrupted position toward said operable position;
and
yarn end orientation means for preventing a yarn end from being pulled too deeply into said yarn-forming zone during a piecing process, said yarn end orientation means assuring that the roller rotating out of the yarn-forming zone is started at least at the same time as the roller rotating into the yard-forming zone.

1 more element

Dependencies are inferred from the claim text.