Patent ID: 7484347

Claim:
A packaging filling apparatus in which a web-form packaging material having a laminated structure and a conductive layer adjacent to a sealing property thermoplastic layer, is longitudinally sealed to be formed into a tubular shape and a fluid product is filled in the tube, the package filling apparatus comprising: a transversal sealing apparatus which performs, at longitudinally spaced apart locations on the tube, transversal sealing in a transversal direction of the tube to form transversal sealing bands on the tube; a cutting apparatus which cuts the tube in the transversal sealing bands to produce a first forming body which is subsequently formed into a packaging filling container of a final configuration; the transversal sealing apparatus comprising a high-frequency oscillator, a controller connected to the high-frequency oscillator, an inductor connected to the high-frequency oscillator and receiving output from the high-frequency oscillator to generate a magnetic field in the packaging material, and a sealing quality control means transmitting a control signal to the controller based on a statistical relation between a plurality of different effect factors affecting quality of the transversal sealing and the quality of the transversal sealing, the controller controlling the high-frequency oscillator based on the control signal from the sealing quality control means; and the effect factors affecting the quality of the transversal sealing comprise effect factors A which include a moisture percentage contained in the web-like packaging material, with or without a laminated metal evaporated film, temperature of the fluid product filled therein, characteristics of the sealing thermoplastic layer of the web-like packaging material and thickness of the conductive layer, as well as effect factors B which include an amount of energy output from the high-frequency oscillator and output impedance from the high-frequency oscillator.