Abstract: A method and apparatus are described for manufacturing receptacles such as yoghurt pots having a bottom at one end and a cover or border at the other end. A body portion of the receptacle is formed from a blank at a first working station and transferred to second and third working stations where the bottom and border are applied. The border may comprise an edge rolled on itself and the body may be conical. A number of sets of stations may be mounted on a rotatable turret and the process may be made fully automatic.

Abstract: A rotating platform carries circumferentially spaced presses having bonding electrodes. A pair of stationary inductors, preferably arcuate plates, are connected to a high frequency generator. The electrodes of respective presses are connected to respective pairs of movable inductors which overlap the stationary inductors successively as the presses pass thereby, and provide capacitive couplings to supply high frequency energy to the presses successively to bond the material held by the presses. The overlapping portions of the fixed and movable inductors are of different circumferential length which, together with the rotation, controls the length of the bonding periods and automatically switches the bonding current from one press to the next. Odd numbers of overlapping plates for the capacitive couplings are provided, particularly three plates. The movable inductors are advantageously attached to the jaws of the presses.