Collapsible bag with square ends formed by triangular portions

Flexible bags – Lifting or suspending element – Hanging element

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Details

383 36, 383 41, 383 67, 383121, 383117, 383904, 383906, 222105, 222181, 222185, B65D 3004, B65D 3314, B65D 3316, B65D 3336

Patent

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047900296

ABSTRACT:
A collapsible bag and method of making it from blanks of a flexible material which are cut from an elongate web substantially without wasting any material between adjacent blanks. Each blank has a circumferentially continuous central portion and four substantially identical isosceles triangular portions at each end of the blank. Adjacent sides of adjacent triangular portions are connected together to provide, when the bag is expanded or filled, generally square ends which are interconnected by generally rectangular side walls. An access opening is provided in an end of the bag by terminating the connections of its triangular portions short of their apexes. Preferably, a spout is received in the access opening and connected to the triangular portions.

REFERENCES:
patent: 3119548 (1964-01-01), Cook et al.
patent: 3961743 (1976-06-01), Hollowell
patent: 4136723 (1979-01-01), Skaadel et al.
patent: 4244970 (1980-09-01), Williamson et al.
patent: 4479243 (1984-10-01), Derby et al.
patent: 4584705 (1986-04-01), Myklebust et al.
patent: 4596040 (1986-06-01), LaFleur et al.

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