EP 0205962 A3 19871028 - METHOD FOR PIECING A YARN IN A FRICTION-SPINNING APPARATUS
Title (en)
METHOD FOR PIECING A YARN IN A FRICTION-SPINNING APPARATUS
Publication
Application
Priority
DE 3522556 A 19850624
Abstract (en)
[origin: US4646513A] To piece up a yarn in a friction spinning device, fibers supplied to a yarn formation position of a friction spinning drum are twisted to form a twisted fiber structure until the latter has sufficient strength for grasping by a suction device moved towards the twisted fiber structure end opposite to yarn withdrawal. The suction device grasps this end and stops such twisted fiber structure. Further fibers wound about the now substantially stationary twisted fiber structure strengthen the so it can be withdrawn by the suction device. Due to such withdrawal and constant further supply of fibers, a yarn-like structure is formed adjoining the twisted fiber structure and such yarn-like structure is also withdrawn. To subsequently again form the actual yarn, withdrawal rollers are engaged so the yarn produced at the yarn formation position is withdrawn at production speed or with a reduced speed still sufficient for forming a yarn. Then the twisted fiber structure and the adjoining yarn-like structure are taken-up by the suction device. Thereafter, taken-up yarn can be transferred to a wind-up device. In the event of a yarn break, the newly-produced yarn is supplied at its yarn end to a yarn-connecting or piecing device which also simultaneously receives a yarn end from the unfinished package. The two yarn ends are interconnected and during such time, the continuously delivered, newly-produced yarn is taken-up by an intermediate storage device, the stored yarn being taken-up again by the package after connection of the two yarn ends.
IPC 1-7
IPC 8 full level
D01H 4/52 (2006.01); D01H 15/00 (2006.01)
CPC (source: EP US)
D01H 4/52 (2013.01 - EP US)
Citation (search report)
[A] DE 3338833 A1 19850509 - STAHLECKER FRITZ, et al
Designated contracting state (EPC)
CH DE FR GB IT LI
DOCDB simple family (publication)
EP 0205962 A2 19861230; EP 0205962 A3 19871028; EP 0205962 B1 19891108; DE 3522556 A1 19870102; DE 3666851 D1 19891214; IN 167273 B 19900929; JP H0236689 B2 19900820; JP S61296131 A 19861226; US 4646513 A 19870303
DOCDB simple family (application)
EP 86107139 A 19860526; DE 3522556 A 19850624; DE 3666851 T 19860526; IN 261MA1986 A 19860409; JP 8839286 A 19860418; US 87452186 A 19860616