Sewing – Special machines – Buttonhole
Patent
1979-10-31
1981-08-25
Feldbaum, Ronald
Sewing
Special machines
Buttonhole
139452, 66123, D05C 1500
Patent
active
042852854
ABSTRACT:
A feed device for feeding yarn or other textile material, the device comprising a hollow member through the interior of which textile material may be passed, feed means for feeding the textile material to the said interior, reciprocating means for reciprocating the hollow member towards and away from the feed means, fluid jet means for directing at least one fluid jet onto the textile material being fed to the hollow member so as to tension the said textile material, and pressure supply means which are arranged to supply a pressure fluid to the said interior to entrain the textile material therethrough during a predetermined portion only of the reciprocation of the hollow member, the pressure supply means also supplying the fluid jet means with an intermittently varying fluid pressure which is respectively reduced and increased, so as to reduce and increase the said tension, in accordance with whether or not the textile material is being entrained through the said interior.
REFERENCES:
patent: 3580444 (1971-05-01), Van Mullekom
patent: 3750716 (1973-08-01), Kimura et al.
patent: 4090536 (1978-05-01), Van Mullekom
Chambers George
Hall Kenneth F.
Casella Anthony J.
Feldbaum Ronald
Newroyd Limited
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