Textiles: spinning – twisting – and twining – Apparatus and processes – Receiving twist type
Patent
1976-08-02
1977-08-09
Petrakes, John
Textiles: spinning, twisting, and twining
Apparatus and processes
Receiving twist type
57105, D02G 104
Patent
active
040402444
ABSTRACT:
A friction drive for a twist-tube for false-twist texturing of textile yarns is described wherein a continuously running belt rotates a pair of driving rolls, maintained at a constant pressure against the belt, to which rollers for rotating the twist tube are co-axially fixed. The driving rolls are carried at the end of a rod, mounted to slide through a fixed holder and subjected to an axial force by a weight hanging on a cord passing over a pulley having a fixed axis to a pin on the rod. The rolls are so mounted on the rod that they can be arranged to engage either face of the belt. Therefore, the force necessary to press the driving rolls against the belt is reversible. This is achieved by providing the rod with two pins, either of which can be chosen for attachment of the cord and from which the cord will hang in opposite directions over the pulley. This gravity mechanism can be replaced by fluid or electromagnetic means for exerting the force on the rod. In the latter event, a force measuring element measures the axial force on the rod and a resulting amplified signal is fed to a coil through which the rod projects, the rod being a magnet.
REFERENCES:
patent: 2807130 (1957-09-01), Trapido et al.
patent: 3488676 (1970-01-01), Bieniok
patent: 3631665 (1972-01-01), Scriver et al.
patent: 3827229 (1974-08-01), Bieniok
Heberlein Maschinenfabrik AG
Petrakes John
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