Abstract: An apparatus and method for making a receptacle from a generally flat thermoplastic blank has an upstream conveyor extending along a path in a transport direction through a loading station, a heating station downstream of the loading station, and a forming station downstream from the heating station. The conveyor has a plurality of supports forming a plurality of respective throughgoing apertures spaced apart in the direction. A supply at the loading station positions a respective blank atop each of the apertures of the conveyor with a central region of each blank exposed through the respective aperture and a periphery of each blank engaging and supported by the respective support A drive connected to the conveyor advances it and the blanks carried on it step-wise through the heating and forming stations. At the heating station at least the central region of each blank is heated to a softening point.

Abstract: A method of positioning a continuous strip of tops over a continuous set of receptacles prior to sealing, wherein the following steps are performed repeatedly;the set of receptacles is advanced past sealing means through a distance equal to one longitudinal pitch of the receptacles or a multiple thereof;simultaneously, the strip of tops is released over a length equal to one longitudinal pitch of the tops or a multiple of said pitch, with said strip being driven by the set of receptacles, and with the longitudinal pitch of the tops being slightly greater than the longitudinal pitch of the receptacles; andapplying deformation to a central zone of each top level with the sealing means so as to shift the edges between the not-yet sealed tops so that they overlie the corresponding edges between receptacles.