| 摘要 |
A stitch chain cutting device includes a fixed blade disposed in a horizontal plane and adjacent the suction inlet of a suction housing downstream of the needle and the feed dog of a sewing machine. A movable knife blade is supported for cooperation with the fixed knife blade and the movable knife blade is adjustably biased into cutting engagement with the fixed knife blade to thereby adjust the amount of pressure contact of the movable blade against the fixed blade. A cam is supported on the feed dog and engages and moves the movable knife blade in a cutting movement relative to the fixed knife blade with each reciprocation of the feed dog. The cam is supported for adjustment on the feed dog so as to vary the position of the cutting movement of the movable knife blade against the fixed knife blade when the knife blades become worn or dull in one cutting position.
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