{
  "$type": "site.standard.document",
  "description": "A pneumatic bias tire in which a crown arc part is less likely to be recessed inward and running performance and abrasion resistance are enhanced, and a manufacturing method for the bias tire, are provided. The manufacturing method is for a pneumatic bias tire having a carcass in which at least two…",
  "path": "/patents/966094",
  "publishedAt": "2014-12-17T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B29D30/0606",
    "SUMITOMO RUBBER IND [JP]"
  ],
  "textContent": "A pneumatic bias tire in which a crown arc part is less likely to be recessed inward and running performance and abrasion resistance are enhanced, and a manufacturing method for the bias tire, are provided. The manufacturing method is for a pneumatic bias tire having a carcass in which at least two carcass plies includes carcass cords that are titled relative to the tire equator by an angle ranging from 20° to 50°, and the carcass cords intersect the carcass cords of the other carcass plies. The manufacturing method includes a green tire forming step of forming a green tire, and a vulcanization step of vulcanizing the green tire. In the vulcanization step, a ground-contact surface Y, on a tire meridian cross-section, of a tread portion 2 is formed so as to have a tread profile 2a including: a crown arc part 10 that forms a crown region TC and projects outward in a tire radial direction with a radius of curvature R1; and shoulder arc parts 11 that form shoulder regions TS, and project outward in the tire radial direction with a radius of curvature R2 greater than the radius of curvature R1.",
  "title": "Pneumatic bias tire and manufacturing method for the same"
}