Manufacturing method of belt and manufacturing apparatus

A manufacturing method of a belt comprising steps of:

• forming a solid rubber into a sheet form;
• forming said solid rubber sheet and a seamless substrate film into a laminated cylindrical shape;
• placing said laminated cylinder between an outer casing mold and a core mold where either said solid rubber sheet or said seamless substrate film is facing inside;
• and
• applying a pneumatic pressure to said laminated cylinder for vulcanizing said solid rubber sheet and for adhering said solid rubber sheet to said substrate so as to form said laminated cylinder in one piece.

A manufacturing apparatus of a belt comprising:

• a cylindrical outer casing mold;
• an inner core mold;
• an air bag for applying a pneumatic pressure to a laminated cylinder comprising a solid rubber and a seamless substrate from the outside of said core mold;
• and
• a vulcanizing room for vulcanizing said cylindrical solid rubber and for adhering said cylindrical solid rubber to said cylindrical substrate so as to form the laminated cylinder in one piece.