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A gussetted flexible tubular package having a longitudinal axis and formed from flexible sheet material, e.g., plastic film. The package comprising a front and rear panel connected by respective side gusset folds. Each of the gusset folds comprises a central fold edge interposed between a pair of ou

A gussetted flexible tubular package having a longitudinal axis and formed from flexible sheet material, e.g., plastic film. The package comprising a front and rear panel connected by respective side gusset folds. Each of the gusset folds comprises a central fold edge interposed between a pair of outer fold edges and defining therebetween respective gusset sections subadjacent the panels. The upper end of the package has an open mouth defined by upper end portions of the panels located between a pair of side seals. Each of the side seals comprises a longitudinally disposed seal and an angularly diverging seal. The longitudinally located seals each include one portion which seals the panels together contiguous with their respective central fold edges and another portion which seals the panels to their respective subadjacent gusset sections contiguous with the respective central fold edges. Each of the diverging seals seals the panels to their respective subadjacent gusset sections at portions thereof which are located between their respective outer fold edges and their associated longitudinally located seals. The mouth of the package is readily sealable by bringing the upper end portions of the panels between the side seals into contact with each other and applying heat and pressure to those panel portions.

대표청구항 ▼

A flexible tubular package having a longitudinal axis and formed from flexible sheet material, said package comprising first and second panels disposed opposite each other and connected by respective gusset folds on laterally opposite sides thereof, each of said gusset folds comprising a central fol

A flexible tubular package having a longitudinal axis and formed from flexible sheet material, said package comprising first and second panels disposed opposite each other and connected by respective gusset folds on laterally opposite sides thereof, each of said gusset folds comprising a central fold edge interposed between a pair of outer fold edges and defining therebetween respective gusset sections which are subadjacent said respective panels, said package having an upper end portion comprising an open mouth and a lower end portion which is sealed, said mouth being defined by upper end portions of said panels which are located between first and second side seal means, each of said side seal means comprising a medially located longitudinally extending seal and an angularly diverging seal, one of said medially located seals sealing the panels together at opposed portions thereof which are contiguous with and include the central fold edge on one side of one of said central fold edges while also sealing the panels to their respective subadjacent gusset sections on the opposite side of said one central fold edge and contiguous therewith, the other of said medially located seals sealing the panels together at opposed portions thereof which are contiguous with and include the other of said central fold edges on one side of said other central fold edge while also sealing the two outer panels to their respective subadjacent gusset sections on the opposite side of said other central fold edge and contiguous therewith, the diverging seal of said first side seal means sealing the panels to their respective subadjacent gusset sections at portions thereof which are located between the outer fold edges and the medially located seal of the first seal means, the diverging seal of said second side seal means sealing the panels of their respective subadjacent gusset sections at portions thereof which are located between the outer fold edges and the medially located seal of said second seal means, the mouth of said package being readily sealable by bringing the upper end portions of the panels into contact with each other between said first and second fold seals.