Importance

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Abstract

A button sewing machine including comprises a stitching needle supported for reciprocating movement up and down; a button holder for holding a sew-through button, which has been sewed on a piece of fabric via at least one looped thread connecting the sew-through button with the piece of fabric, so as to permit the looped thread to extend generally horizontally when the piece of fabric is folded to provide upper and lower segments thereof, one above the other; a fabric holder adapted to be inserted in between the upper and lower segments of the piece of fabric to support the piece of fabric with the upper and lower segments positioned above and below the fabric holder, respectively; a fabric retainer for pressing the upper segment of fabric from above to urge it against the fabric holder; a drive unit for driving the button holder and the fabric holder reciprocatingly and cyclically in a horizontal plane in first and second directions perpendicular to each other; a device for changing and setting the position at which a bundling operation, for turning a bundling thread around the looped thread, to form a spinned cluster of thread is initiated relative to the looped thread, in a direction generally parallel to the looped thread; and a control unit for controlling the drive unit so as to move the button holder and the fabric holder to predetermined positions thereof.

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First Claim