Pneumatic suction apparatus for tensioning, reversing and convey

Details Pneumatic suction apparatus for tensioning, reversing and convey Pneumatic suction apparatus for tensioning, reversing and convey

1992-07-29

1993-08-17

Crowder, Clifford D.

Textiles: knitting

Fabric manipulation

Take-ups

D04B 1588

Patent

active

052358259

ABSTRACT:
A duct (12) movable axially within a tubular wall (1) is provided so as to form with the latter a cavity (I) with grill (14) and an expansion piece (7) shaped so as to cooperate with the upper edge of the duct (12) when the latter is raised so as to close it off and when the latter is lowered so as to form an annular space. A body (18) with holes (20) for entry of the air into the cavity (I) is provided at the end of the tubular wall (1). The duct (12) is movable through a central hole (18A) of the body (18) and has a collar (24) which closes off the holes (20) when the duct (12) is raised, and has holes (26) which, when the duct (12) is raised, are located above the body (18) and, when the duct (12Is lowered, are closed off by the wall of the hole (18A). The suction current is created in the duct (12) during the two phases of tensioning and reversing.

REFERENCES:
patent: 3267698 (1966-08-01), Poteat
patent: 4339932 (1982-07-01), Lomati
patent: 5052196 (1991-10-01), Turini

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