Envelope making machine

Details Envelope making machine Envelope making machine

1975-05-05

1976-12-21

Coan, James F.

93 62, B31B 126

Patent

active

039981371

ABSTRACT:
A first roll is provided in its periphery with a row of vacuum holes extending lengthwise thereof for holding against it the previously folded leading edge of a traveling envelope having an unfolded closing flap at the trailing edge of the side of the envelope remote from the roll. The roll carries the envelope between it and a second roll rotating in the opposite direction and also provided with a row of vacuum holes to hold the closing flap against it so that the envelope will be pulled away from the first roll and the flap will be folded behind the adjoining portion of the envelope. After the envelope has been pressed against the second roll to crease the fold at the flap, the envelope is removed from the second roll.

REFERENCES:
patent: 2612088 (1952-09-01), Heywood
patent: 3079847 (1963-03-01), Polidori, Jr.
patent: 3643555 (1972-02-01), Ehlscheid
patent: 3668982 (1972-06-01), Stemmler

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