Method and apparatus for scoring and folding envelopes

Details Method and apparatus for scoring and folding envelopes Method and apparatus for scoring and folding envelopes

1982-11-08

1985-03-12

Gilden, Leon

Manufacturing container or tube from paper; or other manufacturi

Container making

Pliable container

493254, 493245, 493263, B31B 2126

Patent

active

045042608

ABSTRACT:
Envelope blanks are scored and folded by pressing the flat blanks through a series of scoring and folding rolls. The rolls include vacuum rolls which invert the envelope blanks during the scoring operation. The blanks are scored laterally and as they pass over the outer surface of one of the vacuum rolls they are scored longitudinally. During the longitudinal scoring operation, the envelopes are curvilinear due to their being drawn down onto one of the vacuum rolls. After the longitudinal scoring operation, the blanks are inverted by being folded along the transverse score. The inverted, folded blanks are then moved along by a pair of cooperating vacuum rolls to a gumming station. After being gummed, the blanks are folded along their longitudinal scores with the folded flaps being secured in place by the gum.

REFERENCES:
patent: 2307907 (1943-01-01), Becker
patent: 2731891 (1956-01-01), Weisshuhn
patent: 3116668 (1964-01-01), Novick
patent: 3641883 (1972-02-01), Smith
patent: 3793926 (1974-02-01), Honsel
patent: 4338085 (1982-07-01), Sullivan

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