Document file

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1987-04-01

1988-12-13

Little, Willis

Envelopes, wrappers, and paperboard boxes

Paperboard box

Box material includes a coating or a nonpaperboard...

229 72, 22912002, B65D 300

Patent

active

047904747

ABSTRACT:
An improved document file is proposed which has a pair of covers, a plurality of bag members laminated one upon another, and a plurality of reinforcing padding members mounted in pocket-like or sheaths spaces formed between the adjoining bag members. The padding members serve to eliminate any difficulty in opening the compartments formed by the bag members, due to limpness of the material of which the bag members are made.

REFERENCES:
patent: 574974 (1897-01-01), Wiley
patent: 916206 (1909-03-01), Shedd
patent: 1698841 (1929-01-01), Doughty
patent: 2715493 (1955-08-01), Vogt
patent: 2756515 (1956-07-01), Hoffman
patent: 4331290 (1982-05-01), Benham

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