Solid material comminution or disintegration – Apparatus – Cooperating comminuting surfaces
Patent
1981-05-15
1983-10-25
Silverberg, Fred
Solid material comminution or disintegration
Apparatus
Cooperating comminuting surfaces
83501, 241236, B02C 1818
Patent
active
044113919
ABSTRACT:
The invention concerns a document shredding machine of the kind comprising two cutter assemblies, each assembly comprising a drive shaft upon which cutter discs are mounted at spaced intervals, the assemblies being mounted so that the discs of one assembly enter into the gaps between the discs of the other assembly with little or no clearance, the machine comprising a drive mechanism to rotate the drive shafts in opposite directions, so that the overlapping discs collectively act to cut material fed into the nip of the machine into narrow strips. One of the cutter assemblies is capable of movement away from its normal working position, whereby when thick documentary material is fed into the nip, as would otherwise tend to jam the machine, the cutter discs may be permitted to separate somewhat allowing the documentary material to pass through the machine without jamming. On completion of passage of the documentary material through the machine, the cutter discs return to their normal working positions automatically.
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patent: 4140285 (1979-02-01), Linzberger et al.
Ofrex Group Limited
Silverberg Fred
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