Envelope opener

Details Envelope opener Envelope opener

1980-09-24

1983-06-21

Whitehead, Harold D.

Cutting

Cutter with timed stroke relative to moving work

Uniform periodic tool actuation

83 49, 83595, 83636, 83694, 83912, B26D 520

Patent

active

043888470

ABSTRACT:
Envelopes are opened by standing each envelope on an edge thereof in a guide channel and moving the envelope on edge along the channel into and through a cutting zone where one or more knives being rotated on a flywheel rotor continually move past an anvil and slice off a succession of narrow elongate segments of the border of the envelope. The segments are thrown from the cutter and fall by gravity into a collecting receptacle. Each knife has a cutting edge formed with at least one leading point and with cutting edge portions trailing from the point. Each segment is sliced off by first puncturing the envelope at a point in its border and then slicing it from that point across and along its edge.

REFERENCES:
patent: 443522 (1890-12-01), Hughes
patent: 1167999 (1916-01-01), Hendee
patent: 1408415 (1922-02-01), Smith
patent: 1786959 (1930-12-01), Orr
patent: 1936242 (1933-11-01), Orr
patent: 3301116 (1967-01-01), Owen
patent: 3677117 (1972-07-01), Cutter
patent: 3797350 (1974-03-01), Orrick et al.
patent: 3943807 (1976-03-01), Bingham et al.

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