Abstract: The invention relates to a method and a device for gas filling and sealing of a duct intended to be filled with gas and positioned in a container of a collapsible type. The duct is defined by two opposite side walls which are joined along a connecting portion and comprises an inlet arranged in one of the side walls. A part of the container that comprises the inlet is clamped between an abutment and a gas module which is axially movable towards the abutment. Clamping occurs 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. After completion of the gas filling, the duct is sealed. The invention also relates to a container blank having a duct which is specially developed for the method and the device.

Abstract: 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).

Abstract: A method of making flexible and collapsible bulk bags or liners for bulk bags or containers from individual flat panels of material, or tubes of material folded flat, is disclosed. The bags or liners have one or more sidewalls interconnected by at least a bottom wall and preferably also a top wall generally opposed to the bottom wall. The bags are preferably formed by disposing a pair of inner blanks of material with one on top of the other and then heat sealing along a straight line generally bisecting the blanks and thereafter severing the heat seal along its entire length. Next, a pair of outer blanks of material are disposed adjacent the inner blanks with the inner blanks received between the outer blanks. The outer blanks are each heat sealed about their side edges to an adjacent side edge of an inner blank. Once so formed, the inner blanks form a pair of gusseted panels received between the outer and overlying panels.

Abstract: The present invention relates to an apparatus and method of manufacturing vacuum cleaner bags with a unique tri-lock top and bottom seal. The paper end of at the end of the open bag length is sealed onto itself with seam-paste glue three times providing an extra strong seam to accommodate the ever increasing air pressure created by today's powerful cleaners.

Abstract: A reusable silicone vacuum bag is manufactured by making a silicone vacuum bag envelope having peripheral edges. The bag envelope is spread so that the peripheral edges frame the envelope. FEP is bonded to an area bordering the peripheral edges. The bag envelope is folded over on itself at the peripheral edges. Edge sealing tape is applied to the FEP in the area bordering the peripheral edges and covering the peripheral edges with the tape.

Abstract: An integral support is provided incorporating a pair of horizontally spaced-apart, horizontally opening and edge upstanding panel member-like U-shaped members. The U-shaped members open in the same horizontal direction and a connecting panel portion extends between adjacent legs of the side-by-side U-shaped members. The free ends of the remote legs of the U-shaped members include hand grip defining openings and the legs of the U-shaped members are divergent toward the free ends thereof.

Abstract: An extruded cylinder of plastic material having open ends and die-cut flaps on opposite sides is a supporting holder for limp plastic bags. The holder is formed by an inexpensive process of extruding plastic and cutting the tube into cylinders of the proper length and simultaneously die-cutting the flaps in the sides of the cylinder. The holder is flattened during manufacture and packaged in the flattened condition.

Abstract: A vacuum cleaner bag for use with top loading vacuum cleaner has a first collection tube and a second transfer tube, the tubes having communicating apertures near the top thereof, with a thermoplastic coating on the inner walls of the second transfer tube which is fused together to seal the second transfer tube adjacent the lower wall of the aperture thereof, the top and bottom of the first tube and bottom of the second transfer tube adhesively sealed; and a method for automatically forming the bags by superimposing the two tubes, adhesively securing them together, heat sealing the inner walls of the second transfer tube together, below the aperture, and closing the ends of the tubes.