Abstract: Disclosed is a tray including at least one deformable wall. The product contained in the tray is heated, the vapour produced by the heating being allowed to escape through an opening in the pack. The product is heated, being taken to a desired temperature, a temperature-holding stage is carried out, the vapour being allowed to escape, a gaseous fluid is introduced into the pack at the end of this temperature-holding stage and the pack is closed totally.

Abstract: The installation includes a microwave heater station (14) having a microwave applicator, and a support (10) suitable for supporting the receptacles (12) in the heater station. The support (10) has at least one receptacle zone (20) which is defined by the surface (10A) of the support and by a metal band (24A, 24B) fixed to the support. The zone (20) serves to support a receptacle (12) whose bottom stands on the surface (10A) of the support and whose side wall (12B) is surrounded by the band. The support can be a conveyor bringing the receptacles into the heater station.

Abstract: The installation comprises a microwave heater station (14) having microwave application means, and a support (10) suitable for supporting the receptacles (12) in the heater station. The support (10) has at least one receptacle zone (20) which is defined by the surface (10A) of said support and by a metal band (24A, 24B) fixed to the support. The zone (20) serves to support a receptacle (12) whose bottom stands on the surface (10A) of the support and whose side wall (12B) is surrounded by the band. The support can be a conveyor bringing the receptacles into the heater station.