# US 2014/0190617 A1 · Pneumatic tire production method and pneumatic tire

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- Number: US 2014/0190617 A1
- Document ID: US20140190617A1
- Status: Published application
- Kind: A1
- Application number: 14/238,598
- Filed: 2012-08-24
- Published: 2014-07-10
- Earliest claimed: 2011-09-05
- Assignees: Sumitomo Rubber Industries, Ltd.
- Inventors: Yukishige Adachi; Kei Onishi
- Web page: https://patentgrep.com/patent/US20140190617A1

## CPC

- B29D 30/08: Building tyres
- B29D 30/3057: {by feeding cut-to-length pieces in a direction inclined with respect to the drum axis and placing the pieces side-by-side to form an annular element}
- B29D 30/36: Expansion of tyres in a flat form {, i.e. expansion to a toroidal shape independently of their building-up process}, e.g. of tyres built by the flat-tyres method or by jointly covering two bead-rings
- B60C 9/09: combined with other carcass plies having cords extending diagonally from bead to bead, i.e. combined radial ply and bias angle ply
- B60C 2019/008: {Venting means, e.g. for expelling entrapped air}
- B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00)
- B60C: VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES

## Abstract

An objective of the present invention is to reduce the development of defect during vulcanization. A method for producing a pneumatic tire comprises: a carcass ply forming step to cover both surfaces of a code array made of the carcass cords of the carcass ply with a topping rubber; a step of forming a raw cover including the carcass; and a step of vulcanizing the raw cover. The carcass ply forming step comprises an arranging process to intersect rubber-un-coated air-absorptive organic fiber cords with carcass cords of the carcass ply on at least one side of the carcass ply.

## Claims

### Claim 1

A production method of a pneumatic tire with a carcass comprising a toroidal carcass ply extending from a tread portion through a sidewall portion to a bead core of a bead portion; wherein
said method of producing a pneumatic tire comprises
a carcass ply forming step to cover both surfaces of a code array made of the carcass cords of the carcass ply with a topping rubber,
a step of forming a raw cover including the carcass, and
a step of vulcanizing a raw cover; and
the carcass ply forming step comprises an arranging process for arranging rubber-un-coated air-absorptive organic fiber cords on at least one side of the carcass ply so as to intersect with the carcass cords of the carcass ply.

### Claim 2 (depends on 1)

The pneumatic tire production method as set forth in claim 1, wherein said organic fiber cords are arranged of an angle of from 3 to 20 degrees with respect to the carcass cords.

### Claim 3 (depends on 1)

The pneumatic tire production method as set forth in claim 1, wherein said organic fiber cords are arranged in parallel at intervals of from 30 to 80 mm.

### Claim 4 (depends on 1)

The pneumatic tire production method as set forth in claim 1, wherein said organic fiber cords have a cord diameter of from 5% to 35% of the interval of the carcass cords.

### Claim 5

The pneumatic tire comprising
the toroidal carcass extending from the tread portion through the sidewall portion to the bead core of the bead portion, and
air-absorptive organic fiber cords intersecting with the carcass cords of the carcass ply on an inner or outer surface of the carcass ply, said organic fiber cord being rubber-un-coated before vulcanization.

### Claim 6 (depends on 2)

The pneumatic tire production method as set forth in claim 2, wherein said organic fiber cords are arranged in parallel at intervals of from 30 to 80 mm.

### Claim 7 (depends on 2)

The pneumatic tire production method as set forth in claim 2, wherein said organic fiber cords have a cord diameter of from 5% to 35% of the interval of the carcass cords.

### Claim 8 (depends on 3)

The pneumatic tire production method as set forth in claim 3, wherein said organic fiber cords have a cord diameter of from 5% to 35% of the interval of the carcass cords.