UPSTANDING BAG FOR FLOWABLE OR POURABLE PRODUCTS Russian patent published in 2005 - IPC

FIELD: packages, particularly upstanding bags of heat-sealable or thermally weldable plastic film for storing flowable or pourable products.

SUBSTANCE: bag has opposite side walls sealed together along side edges thereof with side seams creation, lower wall folded into the bag and extending between lower parts of side walls. Lower wall is sealed with corresponding side walls along transversal lower seams and along lower side seams. Bag has upper wall folded into the bag, extending between upper parts of side walls, connected with corresponding side walls along transversal upper seals and connected to corresponding side walls along upper side seams. One upper transversal connection located between upper wall and side walls is heat-sealable by peelable seal arranged between upper end part of upper wall and upper end part of adjacent side wall.

EFFECT: increased gas-tightness, improved ability to bag opening without special tools, increased simplicity and reduced manufacturing cost.

10 cl, 9 dwg