Sewing – Special machines – Quilting
Patent
1976-01-12
1977-02-08
Larkin, G. V.
Sewing
Special machines
Quilting
D05B 1100
Patent
active
040066967
ABSTRACT:
In a quilting machine of the type including a bed plate, means for conducting material to be quilted over the bed plate, vertically reciprocal needles positioned above the bed plate for moving sewing threads through the material to form stitches therein, a presser foot positioned above the bed plate, means for supporting the presser foot for vertical reciprocation relative to the bed plate between upper and lower positions for periodically compressing and releasing the material, and means for driving the presser foot, there is disclosed an improvement wherein the presser foot supporting means comprises means including a pair of opposed, balanced springs for suspending the presser foot in a position intermediate the upper and lower positions, and wherein the presser foot driving means comprises means for cyclically, alternately, increasing and decreasing the compression of one of the springs and simultaneously decreasing and increasing the compression of the other of the springs to reciprocate the presser foot between the upper and lower positions.
REFERENCES:
patent: 2218785 (1940-10-01), Boettcher
patent: 3147720 (1964-09-01), Kuhn
patent: 3385246 (1968-05-01), Schlegel
patent: 3633525 (1972-01-01), Landoni
patent: 3669045 (1972-06-01), Landoni
patent: 3749037 (1973-07-01), Cash
Hinderstein Philip M.
Kirsch Company
Larkin G. V.
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