Sewing – Work manipulating – Creasers and markers
Patent
1976-10-04
1978-03-07
Schroeder, Werner H.
Sewing
Work manipulating
Creasers and markers
112 89, 310322, 310334, D05B 3500
Patent
active
040773400
ABSTRACT:
A workpiece prepuncturing device for use with a sewing machine having drive means for reciprocating a needle and means for feeding a workpiece into association with the needle to sew a stitch comprises a perforating tool which is located at a spaced location from the needle which is comparable to a multiple of the stitch length. The perforating tool cooperates with a counter tool which is mounted on the opposite side of the workpiece and is movable toward and away from the workpiece in timed relationship to the speed of the feed and the reciprocation of the perforating tool. The counter tool is supported in a base portion of the sewing machine by an elastic suspension, and it is in drive connection with the main shaft of the machine which operates the needle and the feed for the workpiece.
REFERENCES:
patent: 2033367 (1936-03-01), Zwicker
patent: 3113225 (1963-12-01), Kleesattel et al.
patent: 3211115 (1965-10-01), Burillon et al.
patent: 3241508 (1966-03-01), Chezaud et al.
patent: 3331220 (1967-07-01), Bastuscheck et al.
patent: 3852144 (1974-12-01), Parry
patent: 3857346 (1974-12-01), Dal Negro
patent: 3934526 (1976-01-01), Damast
patent: 3948194 (1976-04-01), Gunold
Braun Oskar
Dobner Reinhold
Overlach Knud
Pietzsch Ludwig
Nerbun Peter
Pfaff Industriemaschinen G.m.b.H.
Schroeder Werner H.
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