초록 ▼

The invention relates to a method and a device (16) for gas filling and sealing of a duct (7) intended to be filled with gas and positioned in a container (1) of a collapsible type. The duct (7) is defined by two opposite side walls (2) which are joined along a connecting portion (4) and comprises a

The invention relates to a method and a device (16) for gas filling and sealing of a duct (7) intended to be filled with gas and positioned in a container (1) of a collapsible type. The duct (7) is defined by two opposite side walls (2) which are joined along a connecting portion (4) and comprises an inlet (15) arranged in one of the side walls (2). A part of the container (1) that comprises the inlet (15) is clamped between an abutment (17) and a gas module (20) which is axially movable towards the abutment (17). Clamping occurs in such a manner that one of the two side walls (2) included in the duct (7) is allowed, in response to a gas flow supplied from the gas module (20) and entering the duct (7) through said inlet (15), to bulge to form a free passage into the duct (7) for filling the same with gas. After completion of the gas filling, the duct (7) is sealed. The invention also relates to a container blank (10) having a duct (7) which is specially developed for the method and the device (16).

대표청구항 ▼

The invention claimed is: 1. A method of gas filling and sealing of a duct intended to be filled with gas and positioned in a container of a collapsible type, said duct being defined by two opposite side walls which are joined along a connecting portion, and comprising an inlet arranged through one

The invention claimed is: 1. A method of gas filling and sealing of a duct intended to be filled with gas and positioned in a container of a collapsible type, said duct being defined by two opposite side walls which are joined along a connecting portion, and comprising an inlet arranged through one of the side walls, the method comprising: clamping a part of the container, which part comprises said inlet, between an abutment and a gas module which is axially movable towards the abutment, in such a manner that one of the two side walls included in the duct is allowed, in response to a gas flow supplied from the gas module and entering the duct through said inlet, to bulge to form a free passage into the duct for filling the same with gas, the abutment is formed with a recess in its side facing the container to allow said bulge; and after completion of the gas filling, sealing the duct. 2. The method as claimed in claim 1, in which said part of the container is clamped by axial displacement of a nozzle and a packing means, which is arranged outside the same and associated with the gas module, in relation to said abutment. 3. The method as claimed in claim 1, in which the duct is sealed by applying heat and pressure to the part of the duct which abuts against the abutment. 4. The method as claimed in claim 1, wherein the container is formed of a container blank, said container blank including the duct, characterised in that the duct includes: a first segment which after gas filling provides a geometry desired in the container; a second segment adjoining the first segment, said second segment having a significantly smaller cross-sectional area than the first segment; and a third segment adjoining the second segment and comprising an inlet to the duct. 5. The method as claimed in claim 4, in which the inlet is a hole formed in one side wall. 6. The method as claimed in claim 5, in which the third segment is arranged in connection with a duct means of the container blank, through which duct means the container blank is adapted to be filled with its contents.