US 12,320,050 B2 · Method and apparatus for automated ornamental decorative stitching

Abstract

Disclosed is an ornamental chain stitching head, including: an upper head assembly, the upper head assembly controls movement of a needle bar and a walking foot mechanism; a walking foot eccentric configured to allow adjustment of a foot lift while a stitch length eccentric is configured to allow for adjustment of both a walking foot and a needle bar advancement via regulation of a rock frame the determines a length of a stitch created by the ornamental chain stitching head; a lower head assembly; and a needle bar cam assembly that drives rotation of the needle bar during each stitch cycle of the ornamental chain stitching head to achieve desired stitch patterns, the needle bar cam assembly is driven directly by an upper shaft through a pair of gears that reduce the needle bar cam assembly speed according to a size ratio of the pair of gears.

Claims20

Dependent claims

An ornamental chain stitching head, comprising:

an upper head assembly, the upper head assembly controls movement of a needle bar and a walking foot mechanism;
a walking foot eccentric configured to allow adjustment of a foot lift while a stitch length eccentric is configured to allow for adjustment of both a walking foot and a needle bar advancement via regulation of a rock frame the determines a length of a stitch created by the ornamental chain stitching head;
a lower head assembly;
and
a needle bar cam assembly that drives rotation of the needle bar during each stitch cycle of the ornamental chain stitching head to achieve desired stitch patterns, the needle bar cam assembly is driven directly by an upper shaft through a pair of gears that reduce a speed of the needle bar cam assembly according to a size ratio of the pair of gears.

2 more elements

An ornamental chain stitching head, comprising:

an upper head assembly, the upper head assembly controls movement of a needle bar and a walking foot mechanism, the needle bar having a pair of needles;
and
a lower head assembly, the lower head assembly including:
a pair of loopers each having a scarf facing each other;
and
a pair of spreaders, the lower head assembly configured to move pair of loopers towards the pair of spreaders and away from the pair of spreaders during a stitching sequence of the ornamental chain stitching head and the lower head assembly configured to move the pair of spreaders towards and away from each other during the stitching sequence of the ornamental chain stitching head.

3 more elements

A method of providing a stitch to a part with an ornamental chain stitching head, comprising:

moving a pair of needles up and down with an upper head assembly;
and
engaging an upper thread of each of the pair of needles with a pair of loopers of a lower head assembly during a stitching sequence of the ornamental chain stitching head, the pair of loopers each having a scarf facing each other;
and
engaging a lower thread of each of the pair of loopers with a pair of spreaders during the stitching sequence of the ornamental chain stitching head, the lower head assembly moving the pair of loopers towards the pair of spreaders and away from the pair of spreaders during the stitching sequence of the ornamental chain stitching head and the lower head assembly moving the pair of spreaders towards and away from each other during the stitching sequence of the ornamental chain stitching head.

2 more elements

Dependencies are inferred from the claim text.

Method and apparatus for automated ornamental decorative stitching

Life of this patent

Method and apparatus for automated ornamental decorative stitching

Life of this patent

Abstract

Claims20