A method of producing a spiral wound gasket and a device for producing the same

摘要

The present invention relates to a method of producing a spiral wound gasket for sealing fluid such as liquid including water and oil, and gaseous body including vapor and gas. Moreover, the present invention relates to a device for producing the spiral wound gasket. In this invention, the tip portion of a hoop material (A) is cut and raised thereby forming a checking stepped-portion (A1). The checking stepped-portion (A1) is caught by a checking pawl (3), so as to wind the hoop material (A) around a core drum (2). After winding the hoop material (A) around the outer periphery of the core drum (2), once at least, the checking pawl (3) is retracted from the outer periphery of the core drum (2), thereby separating the checking pawl (3) from the checking stepped-portion (A1). The spiral wound gasket produced by the present invention exhibits an excellent sealing property. Moreover, it has also an excellent durability.