Clinching device with seal abutment air cushion means

摘要

A clinching device 1 comprises two rotatable rollers 6,7 which are intended to act upon a seal containing a longitudinal carrier member which can fix the seal to a flange. The rollers 6,7 have a rotating means 8 which is preferably a pneumatic motor. An abutment means 10 is provided to urge the seal in a direction generally parallel to the axis of rotation of the rollers. The device 1 is also provided with an air-release means 22 which acts to provide an air cushion 23 in the region of the abutment means 10. The air-release means 22 can be provided by diversion of some of the air supply for the pneumatic motor. The rollers can have fixed or variable axes of rotation.