System for cutting roving in a spinning machine

Details System for cutting roving in a spinning machine System for cutting roving in a spinning machine

1990-09-18

1992-06-02

Stodola, Daniel P.

Textiles: spinning, twisting, and twining

Apparatus and processes

With preparation for doffing- or donning-type operation

57115, 57264, 57276, 57278, 57299, D01H 724, D01H 746

Patent

active

051176211

ABSTRACT:
A spinning apparatus winds a strand onto a yarn package by relatively rotating a flyer and the yarn package about an upright axis so as to wind the strand in a succession of turns around the package by a flyer finger movable axially relative to the package. Each successive layer of turns is shorter than the preceding one so that the finished package has an axially upwardly tapered upper end. After substantially completely forming the package the rotation is generally stopped to leave the flyer in a position with the finger below the upper end of the last layer of turns formed on the package. Then the package and finger are relatively axially moved until the finger is generally at the upper end of the first layer of turns formed on the package. The flyer and package are then relatively rotated forward, that is in the same direction as when the package was being formed, through at least one half revolution about the axis so as to form a loop of the strand around the upper package end. Slack is then created in the strand upstream of the package and the finger is moved downward below the level of the upper end of the outer layer. Finally the strand is cut below the level of the upper end of the outer layer.

REFERENCES:
patent: 806016 (1905-11-01), Spence
patent: 3643415 (1972-02-01), Mackie
patent: 3681905 (1972-08-01), Furtmeier et al.
patent: 4015416 (1977-04-01), Mori et al.
patent: 4196575 (1980-04-01), Novak
patent: 4313299 (1982-02-01), Gunkinger et al.
patent: 4870815 (1989-10-01), Marchiori et al.

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