Document file

Details Document file Document file

1987-04-09

1988-08-16

Schmidt, Frederick R.

Manufacturing container or tube from paper; or other manufacturi

Container making

Pliable container

493 90, 493206, 493210, 493918, 493920, 493947, 156581, 150 52B, 190902, 229 72, 383 38, 383 86, B31B 4164, B31B 1164

Patent

active

047641592

ABSTRACT:
The present invention is drawn to an improved method of making a document file which has a pair of covers and a plurality of file elements laminated one upon another between the covers. The file elements are hot-sealed together and to the covers. The covers each have an auxiliary sheet hot-sealed to the cover body. The outermost file elements are hot-sealed to the auxiliary sheets of the covers. Thus, no dents or recesses are formed on the cover by hot-sealing the outermost file elements to the respective covers.

REFERENCES:
patent: 404758 (1889-06-01), Weissbrod
patent: 508394 (1893-11-01), Andrews
patent: 923539 (1909-06-01), Law
patent: 3113899 (1963-12-01), Hoag et al.
patent: 3324918 (1967-06-01), Miller
patent: 4079570 (1978-03-01), Rucker
patent: 4498591 (1985-02-01), Smith

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