Attachment for forming envelopes

Details Attachment for forming envelopes Attachment for forming envelopes

1989-11-27

1991-09-10

Terrell, William E.

Manufacturing container or tube from paper; or other manufacturi

Container making

Pliable container

493248, 493249, 493254, B31B 2136, B31B 2162

Patent

active

050470000

ABSTRACT:
A readily removable apparatus for use with an envelope blank-forming machine for the forming of envelopes from those blanks. The apparatus comprises an adhesive sprayer for applying adhesive on one side of a side flap of the envelope blank. It also includes an air lifter to lift a leading edge of the blank into engagement with a buckle bar. A plow folds the side flaps over a rear portion of the envelope blank, and rollers press the adhesive-covered side of the side flaps onto a rear portion of the blank to form an envelope.

REFERENCES:
patent: 2054833 (1936-09-01), Potdevin
patent: 3079144 (1963-02-01), Frei
patent: 4156398 (1979-05-01), McDaniel
patent: 4338085 (1982-07-01), Sullivan et al.
patent: 4504260 (1985-03-01), Lillibridge

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