Sewing – With tables or stands – For plural sewing units
Patent
1975-03-26
1976-04-27
Krizmanich, George H.
Sewing
With tables or stands
For plural sewing units
D05B 2704
Patent
active
039526755
ABSTRACT:
The present invention is directed to apparatus for attachment to a conventional sewing machine to convert the sewing machine to one having a top and bottom workpiece feed mechanism whereby workpieces of extra thickness can be fed through the mechanism and stitched by the machine. The apparatus of the present invention includes a frame adapted to be attached to a side of the sewing machine, a vertically positioned tubular member pivotally attached to the forward end of the frame so that the member is free to move horizontally but not vertically, a feed foot bar telescopically mounted within the tubular member so that the feed foot bar is free to move vertically and is moved horizontally with the movement of the tubular member, and a feed foot attached to the feed foot bar positioned above the sewing machine work supporting surface adjacent the sewing machine feed dog disposed therein. A feed rod adapted to be operably connected to the feed shaft of the sewing machine which imparts forward and rearward motion to the feed dog is connected by a train of mechanism attached to the frame to the tubular member so that when the sewing machine feed dog is moved in the direction of feed and returned the tubular member is moved in a like manner. A lift rod adapted to be operably connected to the lifting shaft of the sewing machine which imparts the upward and downward motion to the feed dog is connected by a train of mechanism attached to the frame to the feed foot bar so that when the feed dog is raised and lowered, the feed foot bar and feed foot attached thereto are simultaneously lowered and raised.
REFERENCES:
patent: 2470759 (1949-05-01), Clayton
patent: 3570427 (1971-03-01), Wenz et al.
patent: 3605662 (1971-09-01), Willenbacher et al.
patent: 3757714 (1973-09-01), Gustmann et al.
Dougherty, Jr. C. Clark
Krizmanich George H.
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