Textiles: spinning – twisting – and twining – Apparatus and processes – Piecing up
Patent
1988-04-25
1989-08-15
Petrakes, John
Textiles: spinning, twisting, and twining
Apparatus and processes
Piecing up
57261, 57401, D01H 1502
Patent
active
048562696
ABSTRACT:
In order to start or recommence spinning of a yarn in a friction spinning apparatus, in the course of starting of spinning or piecing after a yarn break, by means of a fiber transport duct, fibers separated by an opening device, are delivered to a rotating friction spinning drum and twisted to form a twisted fiber structure. When the twisted fiber structure has reached a substantially predetermined diameter, the twisted fiber structure is moved by an airstream delivered from a pressure air infeed channel towards and into a guide tube and from that location, into the convergent space of rotating withdrawal rolls. The twisted fiber structure is entrained at production speed by these withdrawal rolls and is delivered to the diverging or outlet side of the withdrawal rolls to a suction device placed in readiness. This suction device can transfer the formed yarn following the twisted fiber structure to the succeeding or downstream elements provided for further processing.
REFERENCES:
patent: 4509322 (1985-04-01), Briner et al.
patent: 4646513 (1987-03-01), Briner et al.
patent: 4674274 (1987-06-01), Katz
patent: 4680924 (1987-07-01), Briner et al.
Briner Emil
Wehrli Samuel
Kleeman Werner W.
Maschinenfabrik Rieter AG
Petrakes John
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