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1. (WO2018104694) ANTI-PUCKERING APPARATUS, SEWING MACHINE AND KIT
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CLAIMS

1, An anti-puckering apparatus for forming, on a work piece, a line of stitching substantially free from puckering; the apparatus comprising:

(i) a base member for removable attachment to a sewing machine bed surface proximate a needle and a stitch formation zone;

(ii) a carrier member mounted on, and moveable relative to, the base member; and

(iii) an endless row of flexible filamentary elements carried by the carrier member;

wherein the carrier member progressively moves subsets of filamentary elements into and out of a stitch formation zone during the formation of a line of stitching; the filamentary elements being presented across a stitch formation zone in advance of an intended line of stitching at an oblique angle relative to a sewing machine bed surface.

2. An anti-puckering apparatus according to claim 1, wherein upper and/or lower surface(s) of the base member is/are inclined at an oblique angle relative to a sewing machine bed surface.

3. An anti-puckering apparatus according to claim 1, wherein the base member is a sewing folder attachment.

4. An anti-puckering apparatus according to claim 2, wherein the angle of inclination of the upper and/or lower surface(s) of the base member base proximate the stitch formation zone dictates the angle of inclination at which the filamentary elements are presented onto the workpiece across the stitch formation zone.

5. An anti-puckering apparatus according to claim 2, wherein the oblique angle is between 5 and 20 degrees.

6. An anti-puckering apparatus according to claim 2, wherein the oblique angle is between 8 and 12 degrees.

7. An anti-puckering apparatus according to claim 1, wherein the carrier member is a disc or wheel rotafionally mounted to the base member,

8. An anti-puckering apparatus according to claim 7, wherein the disc or wheel is mounted to the underside of the base member,

9. An anti-puckering apparatus according to claim 8, wherein the disc or wheel is rota table abou a non-vertical axis,

10. An anti-puckering apparatus according to claim 7, wherein the filamentary elements project radially beyond the peripheral edge of the disc or wheel.

11. An anti-puckering apparatus according to claim 1, wherein the filamentary elements are circular in cross section and arranged side by side in close proximity to one another.

12. An anti-puckering apparatus according to claim 9, wherein the distance between a peripheral edge of the base member proximate the stitch formation zone and the non-vertical axis of the disc or wheel is less than the radius of the disc or wheel as measured from said axis to the outer extremities of its filamentary elements,

13. A sewing machine comprising an anti-puckering apparatus according to claim 1,

14. A sewing machine according to claim 13, wherein the base member is slidably mounfable on the sewing machine bed surface,

15. A sewing machine according to claim 13, wherein a protrusion on, or attachable to extending from the sewing machine bed surface is engagable with a slot formed in the

16. An anti-puckering kit comprising a plurality of apparatuses according to claim 2, each having differing oblique angles and/or different filament characteristics.