# US 2014/0360419 A1 · Sewing machine and process for sewing together, by means of said sewing machine, at least two overlapping flaps of textile

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- Number: US 2014/0360419 A1
- Document ID: US20140360419A1
- Status: Published application
- Kind: A1
- Application number: 14/361,443
- Filed: 2012-11-21
- Published: 2014-12-11
- Earliest claimed: 2011-11-30
- Assignees: Santoni S.P.A.
- Applicants: Santoni S.P.A.
- Inventors: Tiberio Lonati
- Web page: https://patentgrep.com/patent/US20140360419A1

## CPC

- D05B 1/20: Overedge seams
- D05B 37/04: Cutting devices
- D05B 73/12: Slides; Needle plates
- 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

A sewing machine of an “overlook” “cut-and-sew” type for sewing together at least two flaps (3a, 3b) of textile that are overlapping and belonging to one or more textile articles, comprising at least a needle plate (2) suitable for supporting at least two overlapping flaps (3a, 3b) of textile of one or more textile articles which are sliding for forming sewing stitches (10a, 10b, 10c), the needle plate (2) being provided with through-openings defining respective seatings (4) for passage of sewing needles (5) and at least a lateral appendage (6) defining a sliding line (7) for the sewing stitches (10a, 10b, 10c); a lower crochet hook (14); an upper crochet hook (15); and at least a sewing needle bearing device (11) with at least three sewing needles (5) mounted on the device (11), reciprocally flanked, aligned to one another and supplied with respective sewing threads (10), and being suitable for passing through the seatings (4) of the needle plate (2) for sewing the over-lapping flaps (3a, 3b) of textile, the needle plate (2) being provided with at least three of the seatings (4) for passage of the sewing needles (5), each of the seatings (4) for passage of the sewing needles (5) being configured for being crossed by at least a respective sewing needle, the needle plate (2) being provided with respective separating portions (8) suitable for at least partially separating each seating for passage of sewing needles (5) from the adjacent seatings (4) for passage of needles (5), at least at the passage zone (9) of the needles (5), such as to enable formation in parallel of at least three sewing stitches (10a, 10b, 10c) that are distinct and reciprocally distanced from one another.

## Claims

### Claim 1

A sewing machine of an overlock cut-and-sew type for sewing together at least two flaps (3a, 3b) of textile that are overlapping and belonging to one or more textile articles, comprising at least:
a needle plate (2) suitable for supporting at least two overlapping flaps (3a, 3b) of textile of one or more textile articles which are sliding for forming sewing stitches (10a, 10b, 10c), the needle plate (2) being provided with through-openings defining respective seatings (4) for passage of sewing needles (5) and of at least a lateral appendage (6) defining a sliding line (7) for the sewing stitches (10a, 10b, 10c);
a lower crochet hook (14);
an upper crochet hook (15);
an advancing device suitable for advancing said overlapping flaps (3a, 3b) of textile along an advancement direction with respect to said needle plate (2) during a sewing operation;
a device (12) for cutting said overlapping flaps (3a, 3b) of textile in correspondence of a cutting line (20) of the textile, in proximity and upstream of said lateral appendage (6) along said advancement direction of said flaps (3a, 3b) of textile;
at least a thread feeder (13) for needles suitable for supplying sewing thread (10) to the needles (5) of said sewing machine;
at least a tying thread feeder (16) for supplying tying thread (17) to at least one from between said upper crochet (15) and said lower crochet (14);
a stretcher device (18) of the tying thread (17) from said upper crochet (15) and/or said lower crochet (14);
at least a sewing needle-bearing device (11);
characterised in that it comprises at least three sewing needles (5) mounted on said sewing needle-bearing (11) device, reciprocally flanked, aligned to one another and supplied with respective sewing threads (10), said sewing needles (5) being suitable for passing through said seatings (4) of the needle plate (2) for sewing the overlapping flaps (3a, 3b) of textile, said needle plate (2) being provided with at least three of said seatings (4) for passage of the sewing needles (5), each of said seatings (4) for passage of the sewing needles (5) being configured for being crossed by at least a respective sewing needle, the needle plate (2) being provided with respective separating portions (8) suitable for at least partially separating each seating for passage of sewing needles (5) from the adjacent seatings (4) for passage of needles (5), at least at the passage zone (9) of the needles (5), such as to enable formation in parallel of at least three sewing stitches (10a, 10b, 10c) that are distinct and reciprocally distanced from one another.

### Claim 2 (depends on 1)

The sewing machine of claim 1, characterised in that each of said seatings (4) for passage of sewing needles (5) is dimensioned and configured for the passage of a single and corresponding sewing needle.

### Claim 3 (depends on 1)

The sewing machine of claim 1, characterised in that said seatings (4) for passage of sewing needles (5) are entirely separated from one another over their whole extension by means of said separating portions (8) and/or are defined by through-openings that are completely distinct from one another.

### Claim 4 (depends on 1)

The sewing machine of claim 1, characterised in that said needles (5) are mounted on the needle-bearing device (11) at a reciprocal distance defined by an interaxis comprised between 1.4 and 2.8 mm, or between 1.5 and 2.5 mm or between 1.6 and 2.0 mm and/or wherein said needles (5) are reciprocally equidistanced, being mounted on the needle-bearing device (11) at equal distances between adjacent needles (5).

### Claim 5 (depends on 1)

The sewing machine of claim 1, wherein at least said lateral appendage (6) defining a sliding line (7) and/or at least one of said separating portions (8) and/or all said separating portions (8) are inferiorly terminated or tapered for enabling the passage of said lower crochet (14) in proximity of said needle plate (2).

### Claim 6 (depends on 1)

The sewing machine of claim 1, wherein said sliding line (7) of said lateral appendage (6) exhibits, at least in a tract extending between the passage zone (9) of the sewing needles (5) and a front end portion of the appendage (6), or over a whole extension thereof, a conformation which is substantially straight and transversal with respect to a prevalent longitudinal development direction of the lateral appendage (6) and/or to the sliding direction of said flaps (3a, 3b) of textile.

### Claim 7 (depends on 1)

The sewing machine of claim 1, wherein said lateral appendage (6) exhibits a front portion having a narrowed end, having a thickness measured in a plane passing through an upper rest surface of said needle plate (2) of less than 2 mm or 1 mm or 0.5 mm, and a rear base portion, opposite the front end portion, having a thickness, transversal to its longitudinal extension, comprised between 4 mm and 7 mm, or between 5 mm and 6.5 mm, or between 5.5 and 6 mm.

### Claim 8 (depends on 1)

The sewing machine of claim 1, wherein said lateral appendage (6) exhibits, at said passage zone (9) of the sewing needles (5), a thickness transversal to its longitudinal extension that is comprised between 3 mm and 6 mm, or between 4 mm and 5.5 mm, or between 4.2 and 5 mm, or wherein said transversal thickness is greater than 3 mm, or greater than 3.5 mm, or greater than 4 mm, or greater than 4.2 mm.

### Claim 9 (depends on 1)

The sewing machine of claim 1, wherein four of said sewing needles (5) are comprised, mounted on the needle-bearing device (11) and wherein said needle plate (2) is provided with four of said openings for the passage of sewing needles (5).

### Claim 10

A process for sewing at least two overlapping flaps (3a, 3b) of textile together, by means of an overlock cut-and-sew sewing machine (1), comprising at least steps of:
arranging at least two overlapping flaps (3a,3b) of textile in correspondence of a needle plate (2) of a sewing machine (1) of the overlock cut and sew type, the needle plate (2) being provided with at least three openings, at least partially distinct from one another, for passage of sewing needles (5);
advancing said flaps (3a, 3b) of textile with respect to said needle plate (2);
progressively cutting a lateral portion of the flaps (3a, 3b) of textile;
passing at least a respective sewing needle, fed with a respective sewing thread (10), through each of the three openings for the passage of sewing needles (5), such that the at least three reciprocally-flanked sewing needles (5) sew said flaps (3a, 3b) of textile one to the other realising at least three distinct sewing stitches (10a, 10b, 10c), cooperating with at least a lower crochet (14) and at least an upper crochet (15), at least one of the crochets being fed with a tying thread (17).