Paper shredder cutting tool having multiple cutting edges (-)

Details Paper shredder cutting tool having multiple cutting edges (-) Paper shredder cutting tool having multiple cutting edges (-)

2005-05-04

2008-09-09

Rosenbaum, Mark (Department: 3725)

Solid material comminution or disintegration

Apparatus

Cooperating comminuting surfaces

C241S295000

Reexamination Certificate

active

07422172

ABSTRACT:
A paper shredder cutting tool having multiple cutting edges (-) constructed from a pair of cylindrical rotary cutters, which are each separately mounted on a polygonal shaft, and a plurality of cutting blades are securely mounted on the shafts. A paper guide is configured between each pair of adjacent cutting blades, thus partitioning the cutting blades therebetween, and thereby allowing the cutting blades to be assembled and mounted in an interleaving fashion on the two cylindrical rotary cutters. Moreover, each of the cutting blades is further constructed from a pair of blades. Having a plurality of cutting edges circumferentially arranged and minimally separated on each of the pair of blades, thereby forming a compact assembly of blade edges. The paper shredder cutting tool provides capability to feed around tens sheets of paper or cardboard at one time, thereupon being rapidly shredded into small bits. The present invention is characterized that, saw-toothed cutting blades comprising two sets of blades are constructed into a radiate fashion by configuring one set thereof counter clockwise on one half of a shaft, and the other set clockwise on the second half of the shaft. The radiate pattern of the cutting blades prevents the pieces of paper from slanting and enables the paper to be ripped into small bits completely.

REFERENCES:
patent: 3974970 (1976-08-01), Bertrand et al.
patent: 4206882 (1980-06-01), Barnes et al.
patent: 5275342 (1994-01-01), Galanty
patent: 6513740 (2003-02-01), Ho
patent: 6565026 (2003-05-01), Hall
patent: 2006/0049291 (2006-03-01), Rajewski

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