Device for folding the closure flap of envelopes

Package making – Closing packages and filled receptacles – Package or receptacle having closure flap – e.g. – carton...

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Details

53206, 53234, 270 68R, B65B 720

Patent

active

040105989

ABSTRACT:
The closure flap folding device includes a first conveying means arranged to convey envelopes having open closure flaps into a rotating receiver. The receiver includes a pair of spaced discs mounted on a shaft and the discs have a plurality of radially extending spaced slots therein forming radially extending fingers therebetween. The fingers have a generally square peripheral edge portion and resilient members secured thereto that extend into adjacent slots. An adjustable guide member is positioned between the spaced discs and positions the envelopes within the slot so that the closure flap score line is aligned with the square peripheral edge of the adjacent finger. An arcuate flap folding member is positioned around a portion of the discs and has a portion that converges toward the outer peripheral edge of the discs. As the receiver rotates the closure flaps of the envelopes in the slots contacts the inner surface of the arcuate folding member and the closure flap is partially folded along the score line. A second conveying device is provided to convey the envelope with the partially folded closure flap between a pair of pressure rolls to complete the folding of the closure flap. The envelopes with the folded closure flap are conveyed by the second conveying means to a suitable envelope delivery device.

REFERENCES:
patent: 1152794 (1915-09-01), Cox
patent: 1984850 (1934-12-01), Van Buren
patent: 2131428 (1938-09-01), Dalkowitz
patent: 2240989 (1941-05-01), Hood
patent: 2522234 (1950-09-01), Mills
patent: 2602531 (1952-07-01), Plank
patent: 2820573 (1958-01-01), McConnell
patent: 3055490 (1962-09-01), Anderson
patent: 3438176 (1969-04-01), Reil
patent: 3537362 (1970-11-01), Harper
patent: 3564979 (1971-02-01), Weber

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