Method of making a tire with multiple body plies

Patent metadata

Field	Value
Publication number	US-12269299-B2
Application number	US-202318385108-A
Country	US
Kind code	B2
Filing date	Oct 30, 2023
Priority date	Aug 27, 2019
Publication date	Apr 8, 2025
Grant date	Apr 8, 2025

Abstract

A method of making a tire includes providing a first body ply having a first width and laying a second body ply above the first body ply. The second body ply has a second width less than the first width. The method also includes laying a third body ply above the second body ply. The third body ply has a third width greater than the first width. The method further includes laying a first bead at a first location above the third body ply, laying a second bead at a second location above the third body ply, laying a first stabilizer ply insert at a third location above the third body ply, and laying a second stabilizer ply insert at a fourth location above the third body ply. The third location is between the first location and the second location, and the fourth location is between the third location and the second location.

First claim

What is claimed is:

1. A method of making a tire, the method comprising:
providing a first body ply having a first width;
laying a second body ply above the first body ply, the second body ply having a second width less than the first width;
laying a third body ply above the second body ply, the third body ply having a third width greater than the first width;
laying a first bead at a first location above the third body ply;
laying a second bead at a second location above the third body ply;
laying a first stabilizer ply insert at a third location above the third body ply, the third location being between the first location and the second location;
laying a second stabilizer ply insert at a fourth location above the third body ply, the fourth location being between the third location and the second location;
wrapping the first body ply, the second body ply, and the third body ply around the first bead, such that the first body ply has a first turn up portion with a first turn up height, the second body ply has a second turn up portion with a second turn up height less than the first turn up height, and the third body ply has a third turn up portion with a third turn up height greater than the first turn up height, and such that the third turn up portion contacts the first stabilizer ply insert; and
wrapping the first body ply, the second body ply, and the third body ply around the second bead, such that the first body ply has a fourth turn up portion with a fourth turn up height, the second body ply has a fifth turn up portion with a fifth turn up height less than the fourth turn up height, and the third body ply has a sixth turn up portion with a sixth turn up height greater than the fourth turn up height, and such that the sixth turn up portion contacts the second stabilizer ply insert.

2. The method of claim 1 , further comprising laying a circumferential belt above the third body ply.

3. The method of claim 2 , wherein the laying of the circumferential belt above the third body ply includes laying the circumferential belt above the third body ply such that a first end of the circumferential belt contacts the first stabilizer ply insert and such that a second end of the circumferential belt contacts the second stabilizer ply insert.

4. The method of claim 2 , further comprising laying a circumferential tread above the circumferential belt.

5. The method of claim 4 , further comprising extending a first sidewall from a first bead region to the circumferential tread and extending a second sidewall from a second bead region to the circumferential tread.

6. The method of claim 1 , wherein the first bead includes a first bead core and a first bead filler, and wherein the second bead includes a second bead core and a second bead filler.

7. A method of making a tire, the method comprising:
providing a first annular bead and a second annular bead;
providing at least three body plies, including a first body ply, a second body ply, and a third body ply;
extending each of the at least three body plies between the first annular bead and the second annular bead, including:
extending the first body ply downward, axially inside of the first annular bead and wrapping the first body ply around the first annular bead, such that the first body ply has a first turn up portion that extends upward, axially outside of the first annular bead, and such that the first turn up portion terminates at a first turn up end,
extending the second body ply downward, axially inside of the first annular bead and axially outside of the first body ply and wrapping the second body ply around the first annular bead, such that the second body ply has a second turn up portion that extends upward, axially outside of the first annular bead and axially inside the first turn up portion, and such that the second turn up portion terminates at a second turn up end that is radially lower than the first turn up end, and
extending the third body ply downward, axially inside of the first annular bead and axially outside of the second body ply and wrapping the third body ply around the first annular bead, such that the third body ply has a third turn up portion that extends upward, axially outside of the first annular bead and axially inside the second turn up portion, and such that the third turn up portion terminates at a third turn up end that is radially higher than the first turn up end;

placing a circumferential belt radially above the at least three body plies, such that the circumferential belt extends axially across a portion of the at least three body plies;
placing a circumferential tread radially above the circumferential belt;
placing a first stabilizer ply insert such that a first end of the first stabilizer ply insert is axially inside a first end of the circumferential belt and radially below the circumferential belt, and such that a second end of the first stabilizer ply insert is axially outside of the first end of the circumferential belt and radially lower than the third turn up end;
placing a second stabilizer ply insert such that a first end of the second stabilizer ply insert is axially inside a second end of the circumferential belt and radially below the circumferential belt, and such that a second end of the second stabilizer ply insert is axially outside of the second end of the circumferential belt;
extending a first sidewall between the first annular bead and the circumferential tread; and
extending a second sidewall between the second annular bead and the circumferential tread.

8. The method of claim 7 , further comprising extending a fourth body ply between the first annular bead and the second annular bead.

9. The method of claim 8 , further comprising extending the fourth body ply downward, axially inside of the first annular bead and axially outside of the first body ply and wrapping the fourth body ply around the first annular bead, such that the fourth body ply has a fourth turn up portion that extends upward, axially outside of the first annular bead and axially inside the first turn up portion, and such that the fourth turn up portion terminates at a fourth turn up end that is radially lower than the first turn up end.

10. The method of claim 9 , wherein the fourth body ply extends downward axially outside of the second body ply and wherein the fourth turn up portion extends upward, axially inside the second turn up portion.

11. The method of claim 10 , wherein the fourth turn up end is radially higher than the second turn up end.

12. The method of claim 10 , wherein the fourth turn up end is radially lower than the second turn up end.

13. The method of claim 7 , wherein the first sidewall and the second sidewall are constructed of a first rubber compound, and wherein the first stabilizer ply insert and the second stabilizer ply insert are constructed of a second rubber compound.

14. The method of claim 13 , wherein the first rubber compound is different from the second rubber compound.

15. The method of claim 13 , wherein the first rubber compound is the same as the second rubber compound.

Assignees

• Bridgestone Americas Tire Operations Llc

Inventors

• Kosmac Kevin J
• Fischer Austin J
• Durivage William H

Classifications

• B60C15/0018

  not folded around the bead core, e.g. floating or down ply · CPC title

• B60C15/0009

  features of the carcass terminal portion · CPC title

• B60C9/02

  Carcasses · CPC title

• B29D30/16

  Applying the layers; Guiding or stretching the layers during application {(applying tread bands to carcasses B29D30/58; retreading B29D30/54)} · CPC title

• B60C15/0072

  with ply reverse folding, i.e. carcass layer folded around the bead core from the outside to the inside · CPC title