# US 2014/0196836 A1 · Method for applying stretched elastic strands to a substrate

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- Number: US 2014/0196836 A1
- Document ID: US20140196836A1
- Status: Published application
- Kind: A1
- Application number: 14/230,728
- Filed: 2014-03-31
- Published: 2014-07-17
- Earliest claimed: 2012-03-12
- Assignees: Nordson Corporation
- Applicants: Nordson Corporation
- Inventors: Wesley C. Fort
- Web page: https://patentgrep.com/patent/US20140196836A1

## CPC

- A61F 13/15577: {Apparatus or processes for manufacturing}
- A61F 13/15593: {having elastic ribbons fixed thereto; Devices for applying the ribbons}
- A61F 13/15609: {the ribbons being applied in an irregular path}
- B05C 5/0241: {for applying liquid or other fluent material to elongated work, e.g. wires, cables, tubes}
- B29C 65/4815: {Hot melt adhesives, e.g. thermoplastic adhesives}
- B29C 65/524: {by applying the adhesive from an outlet device in contact with, or almost in contact with, the surface of the part to be joined}
- B65H 57/16: formed to maintain a plurality of filaments in spaced relation
- B65H 57/28: Reciprocating or oscillating guides (traversing devices for winding, coiling, or depositing filamentary material B65H54/28)
- A61F 2013/1591: {via adhesive}
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)
- B05C: APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (spraying apparatus, atomising apparatus, nozzles B05B; plant for applying liquids or other fluent materials to objects by electrostatic spraying B05B5/08)
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B65H: HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES

## Abstract

A system and method applies a plurality of stretched elastic strands onto a substrate such as along a predetermined non-linear path, to form a leg gather of a disposable absorbent personal hygiene product. The system includes an adhesive dispensing module for individually applying adhesive to the elastic strands. A heated strand guide located downstream of the dispensing module includes guide openings for the respective elastic strands. A drive mechanism coupled to the strand guide actuates movement of the strand guide in a direction transverse to the movement direction of the substrate, thereby causing the elastic strands to be applied to the substrate along the predetermined non-linear path.

## Claims

### Claim 1

A method of applying a plurality of stretched elastic strands onto a substrate, comprising:
dispensing adhesive individually onto the elastic strands;
passing the elastic strands with adhesive through a strand guide located proximate to the substrate as the elastic strands move in a machine direction;
heating the strand guide to reheat the adhesive before application to the substrate and to prevent adhesive build up on the strand guide as the elastic strands pass through the strand guide; and
adhering the elastic strands to the substrate after passing the elastic strands through the strand guide.

### Claim 2 (depends on 1)

The method of claim 1, further comprising:
moving the strand guide in a direction transverse to the machine direction such that the elastic strands are applied to the substrate along a predetermined non-linear path.

### Claim 3 (depends on 2)

The method of claim 2, wherein the strand guide is coupled to a gantry of a drive mechanism, which also includes a drive shaft coupled to the gantry and a motorized cam, and the method further comprises:
rotating the cam to move the drive shaft, the gantry, and the strand guide along the transverse direction.

### Claim 4 (depends on 3)

The method of claim 3, wherein rotating the cam further comprises:
rotating the cam to oscillate the gantry and the stand guide back and forth along the transverse direction.

### Claim 5 (depends on 3)

The method of claim 3, wherein passing the elastic strands through the strand guide further comprises:
setting a spacing between adjacent elastic strands, the spacing being maintained during adherence of the elastic strands to the substrate.