Solid material comminution or disintegration – Apparatus – Cooperating comminuting surfaces
Patent
1999-06-14
2000-07-18
Husar, John M.
Solid material comminution or disintegration
Apparatus
Cooperating comminuting surfaces
241291, 241295, B02C 1806, B02C 1818
Patent
active
060894822
ABSTRACT:
A blade assembly for paper shredders includes a plurality of blades arranged in a series on a rotary shaft. Each of the blades has a central hole and is integrally formed to have long and short projecting plates projecting from opposed sides thereof, respectively. The height of the long and short projecting plates is slightly larger than the thickness of the blade. The central hole of the blade can allow passage of the rotary shaft, which is configured to be polygonal. The long projecting plates of each blade bend towards the central hole to form engaging portions for engaging angular portions of the rotary shaft. The short projecting plates also bend towards the central hole to form retaining portions for engaging planer portions of the rotary shaft. The blades are arranged on the rotary shaft to form a bladed shaft such that the long and short projecting plates of one blade are in register and abut the long and short projecting plates of adjacent blades, thereby defining alternately arranged irregular intervals between the blades. When adapted for use in paper shredders, two bladed shafts are stacked to achieve alternate cutting of paper, thereby eliminating use of partition rings, reducing costs, and enhancing assembly efficiency.
REFERENCES:
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patent: 5163629 (1992-11-01), Raterman et al.
patent: 5236139 (1993-08-01), Radtke
patent: 5511729 (1996-04-01), Husain
patent: 5560552 (1996-10-01), Powell et al.
patent: 5639035 (1997-06-01), Maugle et al.
patent: 5676321 (1997-10-01), Kroger
patent: 5788169 (1998-08-01), Koenig
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