Tufting machine apparatus

Details Tufting machine apparatus Tufting machine apparatus

1982-12-17

1984-05-01

Feldbaum, Ronald

Sewing

Special machines

Buttonhole

112 79A, D05C 1500

Patent

active

044454473

ABSTRACT:
A tufting machine having a needle bar moveable transversely to the direction of movement of the base material has a stitch placement drive including a stepper cam and a cam drive adapted selectively to rotate the cam through a predetermined angle and in a predetermined direction. A sensor operative in response to the position of the needles energizes the cam drive when the needles are in a retracted position. The cam drive includes a motor, and gearing provided between the motor and the cam so that one revolution of the gearing causes rotation of the cam through an angle substantially equal to the angular separation of the steps about the periphery of the cam. The motor is braked when it is in a datum position as determined by a second sensor coupled to the motor, the brake and an indexing pattern device which controls the rotational direction and number of revolutions made by the motor.

REFERENCES:
patent: 3908570 (1975-09-01), Puckett
patent: 3964408 (1976-06-01), Smith
patent: 3972295 (1970-08-01), Smith
patent: 4010700 (1977-03-01), Webb
patent: 4173192 (1979-11-01), Schmidt et al.

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