Pneumatic tire including self-sealing material and method of manufacturing the same

A method of manufacturing a pnuematic tire provided in a tread portion extending continuously in the tire circumferential direction and filled with a self-sealing material for sealing punctures, said method comprising

• building a green tire provided with an annular anti-adhesive sheet embedded in rubber in a tread portion thereof along the inside of the tire, and in rubber sheet, wherein said annular anti-adhesive sheet is made of a material which does not firmly adhere to the adjacent rubber, said annular anti-adhesive sheet has circumferential ends spliced to define a spliced portion, and in the spliced portion, at least one of the circumferential ends which is disposed radially inwards of the circumferential end has an edge inclined at an angle of from 30 to 60 degrees with respect to the widthwise direction of the anti-adhesive sheet, and
• a supplementary narrow rubber layer made of the same material as in the rubber sheet disposed inside the anti-adhesive sheet such that the supplementary narrow rubber layer extends along one of the circumferential which is disposed radially inwards of the other circumferential end,
• vulcaninizing the green tire, through which said bag portion is formed by the anti-adhesive sheet as an unbonded part in the rubber, and
• injecting the self-sealing material into the bag portion after the tire vulcanized.