Solid material comminution or disintegration – Apparatus – With comminuting member cleaner or scraper
Patent
1988-12-27
1991-01-01
Eley, Timothy V.
Solid material comminution or disintegration
Apparatus
With comminuting member cleaner or scraper
241236, B02C 1800
Patent
active
049812700
ABSTRACT:
A shredding machine is for shredding paper or the like and includes a pair of parallel, spaced-apart shafts which rotate in opposite directions. Each of the shafts includes a plurality of cutting discs mounted thereon for rotation therewith. The cutting discs on one shaft extend between the cutting discs on the other shaft for producing cooperative longitudinal cuts of paper passing therebetween. The cutting discs include a cylindrical outer surface which is interrupted by a plurality of notches. Each of the notches has a trailing transverse surface which intersects the cylindrical outer surface at a transverse cutting edge to form a cutting angle therebetween. The cutting angle is less than forty degrees. The cutting discs on one shaft are oriented with respect to the cutting discs on the other shafts to cause the cutting angle on each of the cutting discs to be aligned with the cylindrical outer surface of the adjacent cutting discs on the outer shaft just prior to overlapping thereof. The cutting angle approaches the cylindrical outer surface generally perpendicular at the overlapping to cause the transverse cutting edge to produce a transverse cut of the paper therebetween. There is also provided a preferred method for producing the cutting discs of the shredding machine.
REFERENCES:
patent: 3845907 (1974-11-01), Schwarz
patent: 4562971 (1996-01-01), Schwelling
patent: 4688730 (1987-08-01), Dahle
patent: 4717085 (1988-01-01), Crane
patent: 4729515 (1988-03-01), Wagner
patent: 4830295 (1989-05-01), Schwelling
Eley Timothy V.
Sherman James L.
Wagner John W.
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