Pre-comminuting and metering apparatus for paper shredders

Details Pre-comminuting and metering apparatus for paper shredders Pre-comminuting and metering apparatus for paper shredders

1993-10-26

1994-11-08

Watts, Douglas D.

Solid material comminution or disintegration

Apparatus

Series material flow only through plural comminuting zones

241224, 241236, B02C 1840, B02C 1806

Patent

active

053620003

ABSTRACT:
A pre-comminuting and metering apparatus, particularly for large plants for shredding paper and similar waste materials. The apparatus includes a pair of cutting rollers arranged at the bottom of a hopper. The cutting rollers are driven in opposite directions and are provided with toothed knife disks. Each knife disk has an inclined circumferential surface defining outermost circumferential edges, wherein the knife disks of the cutting rollers are arranged in pairs and the outermost circumferential edges of each pair of knife disks contact each other. The pairs of knife disks are arranged spaced apart from each other in axial direction of the cutting rollers. The teeth of the knife disks are formed by undercut portions. The undercut portions of the knife disks of each cutting roller are arranged helically offset relative to each other.

REFERENCES:
patent: 3845907 (1974-11-01), Schwarz
patent: 4757949 (1988-07-01), Horton

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