Apparatus to test for the presence of one only thread in textile

Winding – tensioning – or guiding – Coil holder or support – Spool or core

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242 356R, B65H 5422

Patent

active

039840603

ABSTRACT:
To determine if a thread pick-up device, to pick up broken or run-out thread in thread spooling machines, has located therein only a single strand of thread, the thread is passed through a test gap which provides pulses each time the test gap senses that a discrete strand of thread is passed therethrough, the pulses being applied to a counter, the counter controlling operation of the device so that, if a ONE count is received, the thread has been properly picked up; if no count, or more than one count have been received, the thread pick-up operation is controlled, for example, by repeating the pick-up operation, or cutting the thread at the end of the pick-up operation, and repeating, to ensure presence of only a single thread in the pick-up device. Sensing of the thread becomes, therefore, independent of yarn size, thickness, or localized changes in diameter.

REFERENCES:
patent: 3198446 (1965-08-01), Furst et al.
patent: 3220758 (1965-11-01), Raasch et al.
patent: 3294326 (1966-12-01), Raasch
patent: 3599886 (1971-08-01), Koller
patent: 3801031 (1974-04-01), Kamp et al.

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