Abstract: The invention relates to a device for bringing into register the circular end section of a cylindrical element with the circular end section of a cylinder end, with a view to assembly thereof by welding, the cylindrical element presenting an axis of revolution and comprising a receiving end adapted to receive the cylinder bottom, the device comprising a frame defining a track; a stop fixed to the frame; a bottom-carrying carriage movable on the track; a cylinder-carrying carriage movable on the track between the fixed stop and the bottom-carrying carriage; and a carriage supporting a member for radially tightening the receiving end of the cylindrical element, this carriage being movable on the track between the cylinder-carrying carriage and the bottom-carrying carriage. The invention is applicable to the manufacture of containers.

Abstract: The present invention relates to a device for positioning and welding binding hoops around a cylindrical element, or cylinder, of revolution, around determined circumferences of the cylinder. The device comprises a cylinder support, a drive member adapted to drive the cylinder in rotation about its axis of revolution, an applying member adapted to apply a half-hoop radially on the cylinder, a magazine or half-hoops adapted to supply the applying member, and a fixed welding station.

Abstract: The invention concerns an automatic welding apparatus for plates. A regular reciprocatory scan is carried out by an optical sensor 18 of the joint 32 between two plates 28 and 30 to be welded: the sensor 18 moves transversely of the general direction of the joint to be welded which moves past under the welding torch 10 and under the sensor 18; the time interval between the instant when the joint is sensed and the instant when the sensor passes the axis of the torch is measured and the torch is moved transversely, by means of a motor 15, in response to the measurement of the time interval, in a direction corresponding to a reduction in this interval, so as to recenter the torch on the joint 32 to be welded. This arrangement avoids drift and possible disengagement from the joint which can occur in welding processes with continuous following of the joint.