A process for packaging a product arranged on a support comprising unrolling a film, moving the film to a packaging assembly defining at its inside a packaging chamber, progressively moving a number of supports inside the packaging chamber of the packaging assembly, closing the packaging chamber with the film sheets held above the respective support, optionally causing one or both of: a gas withdrawal from the hermetically closed packaging chamber and gas injection of a gas mixture of controlled composition, heat sealing the film to said support, wherein the heat sealing uses one or more heaters having heating surfaces which are heated for discrete and short time periods only. An apparatus for performing the above process is also disclosed.

A process for packaging a product arranged on a support comprising unrolling a film, moving the film to a packaging assembly defining at its inside a packaging chamber, progressively moving a number of supports inside the packaging chamber of the packaging assembly, closing the packaging chamber with the film sheets held above the respective support, optionally causing one or both of: a gas withdrawal from the hermetically closed packaging chamber and gas injection of a gas mixture of controlled composition, heat sealing the film to said support, wherein the heat sealing uses one or more heaters having heating surfaces which are heated for discrete and short time periods only. An apparatus for performing the above process is also disclosed.

A process for packaging a product arranged on a support comprising unrolling a film, moving the film to a packaging assembly defining at its inside a packaging chamber, progressively moving a number of supports inside the packaging chamber of the packaging assembly, closing the packaging chamber with the film sheets held above the respective support, optionally causing one or both of: a gas withdrawal from the hermetically closed packaging chamber and gas injection of a gas mixture of controlled composition, heat sealing the film to said support, wherein the heat sealing uses one or more heaters having heating surfaces which are heated for discrete and short time periods only. An apparatus for performing the above process is also disclosed.

A process for packaging a product arranged on a support comprising unrolling a film, moving the film to a packaging assembly defining at its inside a packaging chamber, progressively moving a number of supports inside the packaging chamber of the packaging assembly, closing the packaging chamber with the film sheets held above the respective support, optionally causing one or both of: a gas withdrawal from the hermetically closed packaging chamber and gas injection of a gas mixture of controlled composition, heat sealing the film to said support, wherein the heat sealing uses one or more heaters having heating surfaces which are heated for discrete and short time periods only. An apparatus for performing the above process is also disclosed.

A method of positioning and sealing a bag in a vacuum chamber, includes detecting a trailing edge of a product in the bag, detecting a trailing edge of a patch adhered to the bag, controlling advancement of the bag, and closing the bag. A bag positioning apparatus includes an infrared sensing apparatus, a fluorescence sensing apparatus, and a controller. A method of manufacturing a patch bag includes adhering a first patch to film stock, detecting a position of the first patch, aligning a second patch with the first patch, and adhering the second patch to the film stock. A method of manufacturing a patch bag includes detecting an edge of a patch adhered to film stock, forming a seal across the film stock adjacent to the edge of the patch, and severing the film stock adjacent to the edge of the patch.

A packaging machine for packaging products under vacuum, the packaging machine comprising a lid and a chamber bottom which together form a chamber, the chamber bottom having formed therein a suction opening which can be closed in a gas-tight manner and to which a suction device for evacuating the chamber is connected. An electrically heatable grid is arranged on the suction opening to prevent ice forming near or around the suction opening during evacuation of the chamber.

A method for increasing the dielectric withstand strength in the enclosure E of an electrical apparatus, this method consisting in placing in the enclosure a dielectric material in liquid or solid form, then in bringing this material to a temperature and/or a pressure allowing for its total or partial evaporation in the enclosure. This method includes a device for retaining the abovementioned material in its container during the handling allowing the placement of the container in the enclosure E, and a device for inducing the evaporation of this material at a certain moment after this placement in the enclosure E and for allowing the dispersion of the gases resulting from this evaporation in the enclosure E.

A method for increasing the dielectric withstand strength in the enclosure E of an electrical apparatus, this method consisting in placing in the enclosure a dielectric material in liquid or solid form, then in bringing this material to a temperature and/or a pressure allowing for its total or partial evaporation in the enclosure. This method includes a device for retaining the abovementioned material in its container during the handling allowing the placement of the container in the enclosure E, and a device for inducing the evaporation of this material at a certain moment after this placement in the enclosure E and for allowing the dispersion of the gases resulting from this evaporation in the enclosure E.

The invention relates to a vacuum chamber packaging machine with spring fracture detection. A first electrical line can be provided connecting springs to a controller, where interruption of the line due to a fractured spring may be detected by the controller via an applied voltage, so that no safety deficiency arises.

The invention relates to a vacuum chamber packaging machine with spring fracture detection. A first electrical line can be provided connecting springs to a controller, where interruption of the line due to a fractured spring may be detected by the controller via an applied voltage, so that no safety deficiency arises.