| 摘要 |
Provided is a presser foot system for sewing machine comprising a small tubular cylinder bed which is used, for example, in joining crotch sewing of underpants or drawers and joining shoulder sewing of shirts. Distance from the center of a needle location to the cutting starting position of a knife trimming mechanism, wherein the upper edges of the ends of fabrics in a vertical face-to-face contact to be fed to a guide path are cut to an even length, is set to the range of 16.5 mm to 18.0 mm in actual dimension. This range is sufficient so that the ends thus cut by one operation of the knife trimming mechanism are stacked one on another by the operation of guide of upper and lower guides until these reach the needle location. Thus, irrespective of the thickness and flexibility of the fabric material and the presence or absence of a step, the ends of the fabrics cut to the even length can be fed in a predetermined stacked state to the needle location, thereby ensuring high quality finish of sewing.
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