Shredder

Details Shredder Shredder

1978-03-13

1979-10-30

Schran, Donald R.

Cutting

Rotatable disc tool pair or tool and carrier

Tool pair comprises rotatable tools

B23D 1906

Patent

active

041724003

ABSTRACT:
A shredder for shredding paper sheets in which a pair of buttress-threaded screws, one of left hand thread and one of right hand thread, are arranged side by side with their threads in mesh. The screws co-rotate in opposition directions so that paper sheets, fed therebetween, are shredded.

REFERENCES:
patent: 592869 (1897-11-01), Hannum
patent: 782977 (1905-02-01), Madden
patent: 1783869 (1930-12-01), Allen
patent: 3033064 (1962-05-01), Lee
patent: 3126780 (1964-03-01), Booth

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