Knife shaft assembly for document shredders

Details Knife shaft assembly for document shredders Knife shaft assembly for document shredders

1991-02-22

1992-08-04

Rosenbaum, Mark

Solid material comminution or disintegration

Apparatus

Comminuting elements

83501, 241236, B02C 1816

Patent

active

051351781

ABSTRACT:
A knife shaft assembly (1) for a document shredder formed from a series of cutting disks (3) arranged on a shaft (2) with spacer rings (4) disposed between them. The spacer rings (4) are compressible, and a securing mechanism, such as snap rings (6) received in grooves (5), is provided on the shaft to secure the cutting disks (3) on the shaft (2) under compression. During assembly, the spaces between the cutting disks (3) are adjusted to a predetermined size by compression in the axial direction. This arrangement enables material costs to be kept low while assuring high dimensional accuracy of the knife shaft assembly.

REFERENCES:
patent: 737194 (1903-08-01), Armstrong
patent: 2589603 (1952-03-01), Cohen
patent: 2804134 (1957-08-01), Berry et al.

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