Cutting – Other than completely through work thickness or through work... – Grooving
Patent
1988-02-26
1989-01-17
Bray, W. Donald
Cutting
Other than completely through work thickness or through work...
Grooving
83564, 83698, 144136R, 144371, B26D 306, B27M 100
Patent
active
047981180
ABSTRACT:
A cutting unit and associated mat cutting apparatus are provided for cutting V-grooves in a mat board or the like. The cutting unit is mounted on a mat cutter and includes a pair of cutting blade holders attached to a frame. Each blade holder mounts a cutting blade therein with an exposed tip. The blade holders are movable between a lowered position relative to frame where the tips are adjacent one another and form a V pattern which intersects the mat board and a raised position. The cutting unit is mounted for precise movement along the guide of the mat cutter whereby a V-groove is precisely cut during movement as the cutting blade holders are held in the lowered position. Preferably, the blade holders are biased to the raised position and a retaining device is provided for retaining the blade holders in a lowered position, preferably locked in a lowered position. The tips of the blade are also preferably offset longitudinally relative to one another.
REFERENCES:
patent: 3672415 (1972-06-01), Holan
patent: 3875835 (1975-04-01), Roberts
patent: 3967519 (1976-07-01), Esterly
patent: 4083390 (1978-04-01), Ingham
patent: 4342349 (1982-08-01), Lipman
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