Method of manufacturing a fluid-filled bladder with a reinforcing structure

• US 8,657,979 B2
• Filed: 04/13/2007
• Issued: 02/25/2014
• Est. Priority Date: 12/23/2003
• Status: Active Grant

• Current Assignee: Nike, Inc.
• Original Assignee: Nike, Inc.
• Inventors: Dojan, Frederick J., Foxen, Thomas, Swigart, John F., Schindler, Eric Steven
• Primary Examiner(s): AFTERGUT, JEFFRY H
• Application Number:
  US11/735,235
• Publication Number:
  US 20070175576A1
• Time in Patent Office: 2,510 Days
• Field of Search: 156/145, 156/245, 156/242, 156/196
• US Class Current: 156/145
• CPC Class Codes: A43B 13/20 Pneumatic soles filled with a compressible fluid, e.g. air, gas inflatable linings for skiboots A43B5/0407
• CPC Class Codes: A43B 21/28 Pneumatic heels filled with a compressible fluid, e.g. air, gas
• CPC Class Codes: B29D 35/122 Soles
• CPC Class Codes: Y10T 156/1043 Subsequent to assembly
• CPC Class Codes: Y10T 428/1334 Nonself-supporting tubular film or bag [e.g., pouch, envelope, packet, etc.]
• CPC Class Codes: Y10T 428/1341 Contains vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit
• CPC Class Codes: Y10T 428/1352 Polymer or resin containing [i.e., natural or synthetic]
• CPC Class Codes: Y10T 428/1379 Contains vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit

Abstract

A fluid-filled bladder with a reinforcing structure and a method of manufacturing the bladder and reinforcing structure are disclosed. In general, the reinforcing structure extends around the bladder, and the reinforcing structure is bonded to an exterior of the bladder. In some embodiments, the reinforcing structure is recessed into the bladder and extends along side surfaces of the bladder and between upper and lower surfaces of bladder. In manufacturing, the reinforcing structure may be located within a mold, and the polymer material forming the bladder may be bonded to the reinforcing structure during the molding process.

Claims

1. A method of manufacturing a fluid-filled bladder with a reinforcing structure, the method comprising steps of:

locating the reinforcing structure within a mold;

heating the reinforcing structure while located within the mold;

heating sheets of polymer material;

bonding at least one of the sheets to the reinforcing structure; and

shaping the sheets with the mold to form the bladder, the bladder having a sidewall, at least a portion of the reinforcing structure being recessed within the sidewall.

2. The method recited in claim 1, wherein the step of heating the reinforcing structure includes heating the mold.

3. The method recited in claim 1, wherein the step of heating the sheets includes selecting the sheets to have different thicknesses.

4. The method recited in claim 1, wherein the step of bonding includes recessing the reinforcing structure into at least one of the sheets.

5. The method recited in claim 1, wherein the step of bonding includes forming an outwardly-facing surface of the bladder to be flush with an outwardly-facing surface of the reinforcing structure.

6. The method recited in claim 1, wherein the step of shaping includes stretching the sheets.

7. The method recited in claim 1, wherein the step of shaping includes:

forming a first surface and a sidewall of the bladder from a first of the sheets, and

forming a second surface of the bladder from a second of the sheets, the second surface being opposite the first surface.

8. The method recited in claim 1, wherein the step of shaping includes forming a plurality of bonds that join the sheets together.

9. The method recited in claim 1, further including a step of incorporating the bladder and the reinforcing structure into an article of footwear, the reinforcing structure extending along an exposed sidewall of the bladder.

10. The method recited in claim 1, wherein the step of shaping includes:

forming a first surface and a sidewall of the bladder portion from a first of the sheets, and

forming a second surface of the bladder portion from a second of the sheets, the second surface being opposite the first surface.

11. The method recited in claim 1, further including a step of pressurizing the bladder portion.

12. The method recited in claim 1, further including a step of incorporating the component into an article of footwear.

13. A method of manufacturing a fluid-filled bladder with a reinforcing structure having a plurality of apertures, the method comprising steps of:

locating the reinforcing structure within a first portion of a mold, a plurality of regions of the first portion of the mold being exposed through the plurality of apertures of the reinforcing structure;

heating the reinforcing structure while located within the first portion of the mold;

heating a first sheet and a second sheet of polymer material;

positioning the first sheet and the second sheet between the first portion and a second portion of the mold;

drawing the first sheet against a surface of the first portion of the mold, against the exposed plurality of regions of the first portion of the mold, and against a surface of the reinforcing structure to recess the reinforcing structure into the first sheet and bond the reinforcing structure to the first sheet;

drawing the second sheet against a surface of the second portion of the mold; and

forming a peripheral bond between the first sheet and the second sheet by compressing the first sheet and the second sheet between the first portion and the second portion of the mold.

14. The method recited in claim 13, wherein the step of heating the reinforcing structure includes heating the mold.

15. The method recited in claim 13, wherein the step of heating the first sheet and the second sheet includes selecting the first sheet and the second sheet to have different thicknesses.

16. The method recited in claim 13, wherein the step of drawing the first sheet against the surface of the first portion of the mold includes forming an outwardly-facing surface of the bladder to be flush with an outwardly-facing surface of the reinforcing structure.

17. The method recited in claim 13, further including steps of

(a) incorporating the bladder and the reinforcing structure into an article of footwear and

(b) securing an outsole that is separate from the reinforcing structure to a surface of the bladder.

18. A method of manufacturing a fluid-filled component, the method comprising steps of:

locating a reinforcing structure of the component within a mold, the reinforcing structure being formed of a first polymer material, and the reinforcing structure having a first portion, a second portion, and a plurality of connecting portions, the connecting portions extending between the first portion and the second portion;

heating the mold to increase a temperature of the reinforcing structure while located within the mold;

heating sheets of a second polymer material that is different than the first polymer material;

recessing the reinforcing structure into the second polymer material to form a bond between the reinforcing structure and at least one of the sheets; and

shaping the sheets with the mold to form a bladder portion of the component, the bladder having a first surface, an opposite second surface, and a sidewall surface extending between the first surface and the second surface, the first portion of the reinforcing structure being adjacent to the first surface, and the second portion of the reinforcing structure being adjacent to the second surface.

19. The method recited in claim 18, wherein the step of recessing includes forming an outwardly-facing surface of the second polymer material to be flush with an outwardly-facing surface of the reinforcing structure.