초록 ▼

A collapsible bag for use in containing and dispensing a liquid includes a bladder layer and an outer layer. The bladder layer includes a pair of inner opposed panel sections sealed together to provide an enclosed region. The inner panel sections have an inner surface facing the enclosed region and

A collapsible bag for use in containing and dispensing a liquid includes a bladder layer and an outer layer. The bladder layer includes a pair of inner opposed panel sections sealed together to provide an enclosed region. The inner panel sections have an inner surface facing the enclosed region and a plurality of ribs formed thereon, and one of the inner panel sections has a first product-dispensing hole therethrough. The outer layer includes a pair of outer opposed panel sections covering the bladder layer and one of the outer panel sections includes a second product-dispensing hole therethrough aligned with the first product-dispensing hole. A spout is attached to the outer layer and covers the first and second product-dispensing holes to provide access to the enclosed region. The bag may be used in a box to dispense liquids.

대표청구항 ▼

[ I claim:] [1.] A method for making a collapsible bag having a first and a second plurality of ribs on oppositely disposed first and second inner bag panel sections such that when the collapsible bag collapses while dispensing liquid the first and second inner bag panel sections are prevented from

[ I claim:] [1.] A method for making a collapsible bag having a first and a second plurality of ribs on oppositely disposed first and second inner bag panel sections such that when the collapsible bag collapses while dispensing liquid the first and second inner bag panel sections are prevented from sealing off liquid in an enclosed region of the collapsible bag, comprising the steps of:providing a first film of a polymeric material;providing a second film of a polymeric material having a first plurality of ribs thereon;aligning the second film with the first film;punching a hole into the first and second films for receiving a liquid dispensing spout in each subsequently formed collapsible bag;providing a third film of a polymeric material;providing a fourth film of a polymeric material having a second plurality of ribs thereon:aligning the first, second, third and fourth films together;sealing the first, second, third and fourth films together to form respective first and second bag side seals and respective top and bottom bag edge seals such that the second film defines the first inner bag panel section having the first plurality of ribs and the fourth film defines the second inner bag panel section having the second plurality of ribs; andcutting along one of the seals to create a plurality of individual bags having said hole for receiving said dispensing spout and having said first plurality of ribs on said first inner bag panel section oppositely disposed from said second plurality of ribs on said second inner bag panel section such that when the collapsible bag collapses while dispensing liquid said first and second plurality of ribs do not interlock with one another and said first and second inner bag panel sections are prevented from sealing off liquid in an enclosed region of the collapsible bag.