PURPOSE:To manufacture a container which has a high transparency and whose bottom appearance is good, by heating and quenching the bottom of a cylindrical bottomed polyester resin piece and then extending the piece along two axes. CONSTITUTION:A polyester resin pipe 10 having a prescribed thickness is fitted on a mandrel 14 and heated again. The upper end of the pipe is pressed by a die 15 so that...

The present invention concerns a process for the production of industrial parts of synthetic material comprising a portion of a rigid material surmounted by a portion of a flexible material, and in particular industrial parts serving as a means for making a seal between different parts of heating or air-conditioning equipment.

1. Non-return device for self-starting synchronous motor, comprising a pinion with a non-return toothing (3b), fast with the rotor (1) of the motor, a cam (5) provided with a slot (5b) through which extends the shaft (2) of the rotor (1), mounted to pivot under the action of the rotation of the shaft (2) of the rotor (1), between two positions, and provided with a nose element (5c) adapted to coop...