Cutting – Tool or tool with support – Rotatable type
Patent
1981-09-15
1988-05-24
Schran, Donald R.
Cutting
Tool or tool with support
Rotatable type
83660, 281 2, B26F 120
Patent
active
047458356
ABSTRACT:
A perforating blade for creating extremely fine perforations in plural plies of a multiply ply paper construction including a perforating edge defined by a plurality of perforating elements separated by notches. Preferably there are about 50 or more of each of the elements and the notches per lineal inch with the notches having a length along the cutting edge of no more than about 0.010 inches. A relatively small number of the perforating elements, at generally uniformly spaced locations along the edge have lengths of about 0.03 inches or more with the remainder of the elements having lengths substantially less than 0.03 inches. The blade provides lines of perforation that when separated, have the appearance of the edge of a so-called cut sheet.
REFERENCES:
patent: 3978783 (1976-09-01), Meaden et al.
patent: 4074599 (1978-02-01), Allen
patent: 4188251 (1980-02-01), Grass et al.
Schran Donald R.
Uarco Incorporated
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