Importance

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Abstract

A presser unit for a bar tacking sewing machine comprises four separate clamp feet 15, 16, 17 and 18 which conform in outer appearance to the U-shaped stitches I--I, II--II and III--III to be formed at the tip end of the waist band portions of pants and a pressing mechanism 60 for elastically press each clamp feet 15, 16, 17 and 18 against a workpiece A with a given pressure thereby to elastically press the workpiece A. As a result, it is possible to provide the presser unit for a bar tacking sewing machine which can perform sewing with improved efficiency and high quality without generating discontinuous stitches and the breakage of a needle, since the tip ends of the waist band portions of pants can be sewn in U shape continuously and easily irrespective of the longitudinal and lateral variation of thickness of the workpiece A and moreover without adjusting a pressure mechanism by applying four separate clamp feet to a portion to be sewn of the workpiece A in such a way as to fit the shape and thickness thereof.

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First Claim