Cutting – Processes – Puncturing
Patent
1988-04-01
1989-11-14
Schran, Donald R.
Cutting
Processes
Puncturing
83142, 83564, 83599, 30234, 281 5, B26F 118
Patent
active
048799327
ABSTRACT:
A manually operable paper slitting device has upper and lower platens normally biased apart from one another. The upper platen has diagonally extending and spaced parallel slitting blades extending downwardly therefrom for cooperation with spaced complementary slots formed in the lower platen. A resilient and compressible paper hold down and stripper element extends downwardly from the upper platen in surrounding relationship to the spaced slitting blades. The spaced slitting blades have an inclined bottom cutting edge which first pierces and then permits slitting of the paper along the cooperating slots in the lower platen. The resilient and compressible paper hold down and stripper element holds the paper from moving during and after the slitting operation. In addition to the aforementioned device, a method of forming diagonally extending parallel slits in paper applies resilient and compressive hold down forces on opposite sides of aligned and squared paper and in surrounding relationship to the area of the paper to be slit. The paper is slit along spaced diagonally extending slits by first piercing and then slitting the paper, and finally the paper is stripped from the slitting blades following the slitting operation.
REFERENCES:
patent: 151723 (1874-06-01), Sigwalt
patent: 436048 (1890-09-01), Valiquet
patent: 3408889 (1968-11-01), Murphy
patent: 3484097 (1969-12-01), Jory
patent: 3517871 (1970-06-01), Gaffney et al.
patent: 4194423 (1980-03-01), Cutler
Scalise Donna J.
Scalise William J.
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