Letter opener

Details Letter opener Letter opener

1989-07-06

1991-03-26

Bell, Paul A.

Cutting

Means to drive or to guide tool

With simple oscillating motion only

83374, 83912, 30278, 30134, 30DIG3, B25F 300

Patent

active

050018337

ABSTRACT:
A device for opening envelopes which comprises a rotatable shaft having an elongate recess in line with the axis of the shaft. A first cutting blade is located on the top edge of the recess and a second cutting blade is secured to a base which supports the shaft. The first and second blades are positioned such that they co-act in a shearing action on rotation of the shaft. To open an envelope, the edge of the envelope is positioned within the recess and the shaft is rotated causing the blades to co-act resulting in a sliver being cut from the envelope.

REFERENCES:
patent: 1666533 (1928-04-01), Heck
patent: 1976156 (1934-10-01), Beidler
patent: 2596467 (1952-05-01), Buckens
patent: 2635694 (1953-04-01), Calhoun et al.
patent: 3225441 (1965-12-01), Myers
patent: 3476043 (1969-11-01), Erdley
patent: 4360970 (1982-11-01), Ostroski et al.
patent: 4741105 (1988-05-01), Wong

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