Importance

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Abstract

A sewing machine for use with a template capable of holding together two or more layers of fabric that are to be stitched together, the template having a groove shaped according to the required stitching profile and engageable with a guide member projecting upwardly from a baseplate of the sewing machine, the groove being open-ended at its start location and the guide member having a hole through which a needle mounted on the sewing machine passes to effect a stitching action. The machine includes a drive wheel having a periphery capable of engaging a drive edge of the template, means for rotating the drive wheel to effect movement of the template relative to the guide member to drive the template so that the groove moves along the guide member, a probe lying to the feed side of the drive wheel and biased generally towards the guide member, first sensor means operable by movement of the probe against the bias in response to correct initial positioning of the template with the open end of the groove engaged over the guide member, means responsive to the first sensor means to control the drive means so as to move the template into a start position, second sensor means mounted on the sewing machine head and responsive to indicator means on the template to produce a signal sequence from the first sensor means, and control means responsive to the signal sequence to control commencement of stitching and drive of the template from the start position around the desired stitching profile.

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First Claim