Abstract: Disclosed is a tray sealing apparatus for sealing a disposable tray with a thermoplastic sealing film. The tray sealing apparatus includes: a base body having a top surface and a tray reception cavity formed in the upper surface; and a heater unit for heating the sealing film that the sealing film adheres by fusion to the flange of the tray inserted in the tray reception cavity. The heater unit includes a principal surface with a predetermined width, and a thin strip-type electric heating element formed in a closed curve shape corresponding to the shape of the flange of the tray. When sealing the tray with the seal film by fusion, the peripheral surface of the electric heating element is disposed along the whole flange of the tray with the seal film being interposed therebetween so as to apply the heat generated by the electric heating element to the seal film.

Abstract: Disclosed is a tray sealing apparatus for sealing a disposable tray with a thermoplastic sealing film. The tray sealing apparatus includes: a base body having a top surface and a tray reception cavity formed in the upper surface; and a heater unit for heating the sealing film that the sealing film adheres by fusion to the flange of the tray inserted in the tray reception cavity. The heater unit includes a principal surface with a predetermined width, and a thin strip-type electric heating element formed in a closed curve shape corresponding to the shape of the flange of the tray. When sealing the tray with the seal film by fusion, the peripheral surface of the electric heating element is disposed along the whole flange of the tray with the seal film being interposed therebetween so as to apply the heat generated by the electric heating element to the seal film.