Method for producing self-sealing envelopes

Details Method for producing self-sealing envelopes Method for producing self-sealing envelopes

1991-09-26

1993-04-13

Ball, Michael W.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

229 80, 271 2, 493240, 493245, 493264, 493917, B31B 126

Patent

active

052019829

ABSTRACT:
Self-sealing envelopes having an envelope front with two side flaps and a osure flap, and a bottom flap with an edge strip along the free edge of the bottom flap, are produced by cutting blanks to size, and producing precreases along lines where folds will be made to fold all flaps. A self-sealing adhesive is applied to the inner surface on the closure flap and on the outer surface of the bottom flap edge strip. All precreases are formed on the same side of the blank, whereby the edge strip must be folded in a direction opposite to its precrease. This feature facilitates the movement of the blank through the envelope production machine into which the blank moves with the edge strip leading in the feed advance direction, and all creasing tools operate in the same creasing direction, whereby all precreasing tools can be located on the same side of the blank.

REFERENCES:
patent: Re19883 (1936-03-01), Vogel
patent: 2092149 (1937-09-01), Berkowitz
patent: 2157898 (1939-05-01), Hohwart
patent: 2227679 (1941-01-01), Swift
patent: 3598024 (1971-08-01), Sauerman
patent: 4270909 (1981-06-01), Ireland

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