Abstract: A heat welding member 23 of a seal head 21 formed in the shape of a flange portion 11a of a container 10 is heated by high frequency induction heating and a cap 12 is welded by pressing the heated seal head 21. By using the seal head 21 comprising the heat welding member 23 having a shape necessary for sealing the cap 12, influences by temperature drop and inflation of gas in a head space can be prevented and sealing at a high speed and in a stable manner can be achieved.

Abstract: A method of melt-adhering together a member (A) having a layer (a) of a thermoplastic resin exposed on at least a portion on the surface on the outer side thereof and a member (B) having a layer (b) of a thermoplastic resin exposed on at least the surface on the inner side thereof, wherein a self-press holding mechanism is formed on the portions on where the layer (a) and the layer (b) are to be melt-adhered together to press the member (A) and the member (B) onto each other and to hold the pressed state thereof, and the press-adhered portion is irradiated with a laser beam in a state where the layer (a) and the layer (b) are press-adhered together to effect the melt-adhesion. Therefore, the melt-adhesion is effected even without fixing the portions to be melt-adhered together by using an external pressing mechanism, and the container can be sealed at high speeds and stably despite the member thereof has a relatively large thickness.

Abstract: Cup-shaped containers can be turned over and transferred with good stability from a sterilization-washing zone to the filling-sealing zone inside an aseptic chamber, and admixture of odor or microorganisms is prevented. The first conveyor 2 for conveying the cup-shaped container 38 in an inverted state and a second conveyor 3 for conveying the container in an upright state downstream of the first conveyor 2 are disposed in series in substantially the same plane inside a continuous aseptic chamber 1. A container supply device, a container sterilization device, and a container washing device are disposed successively along the first conveyor 2. A contents filling device 40, a lid material sealing device 41, and a device for discharging the sealed cup-shaped container are installed successively along the second conveyor 3. Sterilization and washing are performed in an inverted state, while conveying the container with the first conveyor 2.