Method and apparatus for performing sewing operations utilizing sewing machine having means to adjust terminal stitch pitch and sew consecutive patterns
AssigneeTokyo Juki Industrial Co., Ltd.
InventorsSumio Goto, Jiro Ishibashi, Masakazu Nemoto
Life of this patent
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Abstract
A sewing machine capable of multiple functions including terminating stitches at a predetermined point, carrying out predetermined stitch patterns, automatic stitch pitch adjustment, stopping at preset points and thread cutting without operator intervention. These operations are controlled by means of a computer interface with the sewing machine and can carry out labeling, pocket attachment, collar attachment, cuffs etc. at preset intervals.
Claims2
A sewing machine capable of automatically adjusting stitch pitch to terminate the last stitching at a predetermined margin distance by calculating a number of stitches with original pitch and the adjusted pitch which is shorter than the original pitch when a workpiece end sensor detects the workpiece end, comprising:
- storing means to store stitch data corresponding to a plurality of different stitch patterns;
- detecting means for detecting end of a stitching cycle;
- selection means for selecting stitch data corresponding to a subsequent stitch pattern from said storing means when end of one stitch cycle is detected;
- calculating means for calculating stitch pitch by referring to said selected stitch data corresponding to a subsequent stitch pattern selected by said selection means;
- and
- adjusting means for automatically adjusting stitch pitch.
A method for performing sewing operations on a workpiece using a sewing machine capable of adjusting stitch pitch to terminate the last stitching at a predetermined margin distance by calculating a number of stitches with original pitch and the adjusted pitch which is shorter than the original pitch when a workpiece end sensor detects the workpiece end, said method comprising the steps of:
- storing stitch data corresponding to a plurality of different stitch patterns:
- detecting the end of a stitching cycle;
- selecting the stitch data corresponding to a subsequent stitch pattern from the stored stitch data when the end of a stitching cycle is detected;
- calculating the stitch pitch by referring to said selected stitch data corresponding to a subsequent stitch pattern;
- and
- adjusting stitch pitch.
Dependencies are inferred from the claim text.