Rotary cutter

Details Rotary cutter Rotary cutter

1989-11-28

1991-03-26

Phan, Hien H.

Cutting

Cutting motion of tool has component in direction of moving...

Orbital motion of cutting blade

83349, B26D 138

Patent

active

050019520

ABSTRACT:
According to the invention, a rotary cutter is provided, which includes a fixed blade having a straight cutting edge and a rotary blade having a spiral cutting edge. The rotary blade is installed for rotation about an axis extending parallel to the cutting edge of the fixed blade, the spiral cutting edge of the rotary blade moving along a path which extends tangentially to said cutting edge of the fixed blade. At least one of the fixed blade and the rotary blade is shorter than the width of a paper strip. Accordingly, the rotary blade and the fixed blade cooperate with each other to partially cut the paper strip widthwise while leaving the opposite end portions uncut. The fixed blade has opposite surfaces extending toward the cutting edge thereof, one of which comprises an inclined surface formed on the paper inlet side of the fixed blade and disposed at an angle less than 60.degree. with respect to the paper strip. Accordingly, the cut strip can get over the fixed blade without being caught thereon immediately after cutting.

REFERENCES:
patent: 2805715 (1957-09-01), Novick
patent: 3552251 (1971-01-01), Neff et al.
patent: 3650171 (1972-03-01), Reed
patent: 3822265 (1974-07-01), Obenshain
patent: 4119003 (1978-10-01), Corse
patent: 4572686 (1986-02-01), Tanaka

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