Patent ID: 7534040

Claim:
A bag ( 4 ) made of film material, which bag in an unfolded state comprises an essentially rectangular mid section ( 31 ), a front panel ( 11 ) and rear panel ( 12 ) extending from two opposing side edges of the mid section ( 31 ), and having, at right angles to the front panel and the rear panel, two side panels ( 13 , 14 ) that extend from two further side edges of the mid section ( 31 ), each said panel ( 11 , 12 , 13 , 14 ) being provided with two side edges ( 15 , 16 , 15 ′, 16 ′, 32 , 33 , 32 ′, 33 ′) and with an end edge ( 17 , 18 , 17 ′, 18 ′, 33 , 34 , 33 ′, 34 ′) located some distance away from the mid section, wherein, when the bag is in a folded state, the side panels ace folded along their center line ( 35 ), as well as along two fold lines ( 26 , 27 , 28 , 29 ) that run from corner points of the mid section ( 31 ) located close to the respective side panel into or close to the center of the mid section, so that the side panels are double folded, wherein halves of the side panel located on either side of the center line ( 35 ) of the side panels are positioned with their outsides ( 36 , 36 ′) facing one another and wherein the front and rear panels are folded about the center line ( 35 ) of the mid section ( 31 ) and are positioned with their insides ( 24 , 24 ′) facing one another, wherein the double-folded side panels ( 13 , 14 ) are located between the front panel and the rear panel ( 11 , 12 ) the side edges ( 32 , 33 , 32 ′, 33 ′) of the side panels ( 13 , 14 ) are in contact with the adjacent side edges ( 15 , 16 , 15 ′, 16 ′) of the front and rear panels ( 11 , 12 ), and the side panels and the front and rear panels are sealed to one another along the side edges ( 15 , 16 , 15 ′, 16 ′, 32 , 33 , 32 ′, 33 ′) characterized in that the side panels ( 13 , 14 ) and the front and rear panels ( 11 , 12 ) are sealed to one another along the end edges ( 17 , 18 , 17 ′, 18 ′, 33 , 34 , 33 ′, 34 ′), wherein the mid section comprises a hole ( 30 ) made in the film material at or close to the center of the mid section ( 31 ), for receiving a tube ( 5 ) extending in the interior of the bag ( 4 ) which tube is connected to a shut-off valve ( 6 ) located outside the bag, the shut-off valve adapted for sealing to the periphery of the hole ( 30 ), which periphery does not contact any sealed side edges of the side panels.