Case knife with multiple position blade guards

Cutlery – Carton openers

Reexamination Certificate

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C030S286000

Reexamination Certificate

active

07024772

ABSTRACT:
A case knife (1, 101), generally consists of a pair of substantially symmetrical handle shells (13, 112). A single edge razor blade B is removably supported in one end of the handle formed by these handle shells. Each handle shell includes two moving parts—a guard (10, 110) and a thumb or finger operable button (5, 105). Each such guard, when paired with a substantially identical guard of the other handle half shell, flanks the otherwise protruding sharp edge of the razor blade. Each guard can move independently to expose a protruding corner of the razor blade. The operable button is mounted on an axle or lug (14, 103) that passes from the inside of a handle shell, through to its outside surface. This axle is in turn fixed to a cam follower (20, 120) mounted on the inside of each shell.

REFERENCES:
patent: 2376887 (1945-05-01), Walters
patent: 2743523 (1956-05-01), Honey
patent: 3781988 (1974-01-01), Jones
patent: 4675996 (1987-06-01), DuBuque
patent: 4980977 (1991-01-01), Matin et al.
patent: 5241750 (1993-09-01), Chomiak
patent: 6178640 (2001-01-01), Votolato
patent: 6233832 (2001-05-01), Berns
patent: 6560873 (2003-05-01), Ortner et al.
patent: 6578266 (2003-06-01), Chomiak
patent: 6637112 (2003-10-01), Davis

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