Apparatus for making a yarn

Details Apparatus for making a yarn Apparatus for making a yarn

1981-01-22

1982-06-15

Petrakes, John

Textiles: spinning, twisting, and twining

Apparatus and processes

Covering or wrapping

57401, D01H 1135, D02G 336

Patent

active

043344003

ABSTRACT:
Apparatus for making a yarn comprises two juxtaposed, closely spaced apart suction drums which rotate in the same sense and a delivery duct which protrudes into the triangular space between the suction drums and has an exit adjacent to the suction zones and serves to deliver through said exit singled covering fibers to a drawn roving, which has been delivered by a drawing frame disposed to said triangular space at one end thereof. The yarn thus formed in the triangular space between the suction drums is withdrawn by withdrawing means disposed from said triangular space at the other end thereof. In order to improve the wrapping of the roving with the covering fibers, the surfaces of the suction drums are rough and have a microstructure which will prevent a positive coupling to individual covering fibers and has a peak-to-valley depth up to one-half of the yarn diameter.

REFERENCES:
patent: 3439491 (1969-04-01), Scruggs
patent: 4070811 (1978-01-01), Fehrer
patent: 4107909 (1978-08-01), Fehrer et al.
patent: 4241571 (1980-12-01), Turk et al.

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