# US 2018/0023232 A1 · Sewing machine

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- Number: US 2018/0023232 A1
- Document ID: US20180023232A1
- Status: Published application
- Kind: A1
- Application number: 15/644,162
- Filed: 2017-07-07
- Published: 2018-01-25
- Earliest claimed: 2016-07-22
- Assignees: Yamato Mishin Seizo Kabushiki Kaisha
- Applicants: Yamato Mishin Seizo Kabushiki Kaisha
- Inventors: Seiji HASHIMOTO
- Web page: https://patentgrep.com/patent/US20180023232A1

## CPC

- D05B 35/02: for facilitating seaming; Hem-turning elements; Hemmers {(D05B35/062 takes precedence)}
- D05B 23/006: {Sewing machines for making cylindrical articles}
- D05B 29/00: Pressers; Presser feet (for feeding D05B27/04)
- D05B: SEWING (appliances for the tailoring trade A41H; sewing tables A47B29/00; sewing in bookbinding B42B2/00; sewing machines modified for knitting D04B39/08)

## Abstract

Provided is a sewing machine including: a cylinder unit 3 configured to support two materials Fi and Fo having annular edges by being inserted therethrough while they are stacked, with one being located on the inner wheel side and the other being located on the outer wheel side; a stitch plate 12 configured to support the material Fi on the inner wheel side supported by the cylinder unit 3 by abutting it from below; a material presser 13 configured to press the material Fo on the outer wheel side supported by the cylinder unit 3 above the stitch plate 12; and a material sandwiching unit 41 provided on the near side of the stitch plate 12 and the material presser 13 and configured to sandwich, from above and below, the two materials Fi and Fo stacked, with the material Fi on the inner wheel side being located on the lower side and the material Fo on the outer wheel side being located on the upper side.

## Claims

### Claim 1

A sewing machine comprising:
a cylinder unit configured to support two materials having annular edges by being inserted therethrough while they are stacked, with one being located on the inner wheel side and the other being located on the outer wheel side;
a stitch plate configured to support the material on the inner wheel side supported by the cylinder unit by abutting it from below;
a material presser configured to press the material on the outer wheel side supported by the cylinder unit above the stitch plate; and
a material sandwiching unit provided on the near side of the stitch plate and the material presser and configured to sandwich, from above and below, the two materials stacked, with the material on the inner wheel side being located on the lower side and the material on the outer wheel side being located on the upper side.

### Claim 2 (depends on 1)

The sewing machine according to claim 1, wherein
the material sandwiching unit comprises a curl-removing mechanism configured to straighten curls occurring on the edges of the two materials,
the material sandwiching unit comprises, as the curl-removing mechanism, inclined parts having edges of shapes extending backward from the farther side of the edges of the materials toward the edge side at the position where the edges of the two materials pass therethrough, and
the inclined parts have edge parts having a smaller thickness on the near side than on the back side.

### Claim 3 (depends on 2)

The sewing machine according to claim 2, further comprising:
an edge guide located rearward of the curl-removing mechanism and configured to abut the edges of the two materials; and
a knife located rearward of the edge guide and configured to cut the two materials at a specific distance from the edge guide.

### Claim 4 (depends on 3)

The sewing machine according to claim 3, wherein
a relative position between the edge guide and the knife is adjustable so as to allow the specific distance to be changed.