Cutter head for cutting templates from cardboards, plastics, and the like

Claim 1

A cutter head for cutting templates from plastic and cardboard material in accordance with electronically controlled programs, the cutter head comprising: support means positioned in spaced relation to the material and having a bore therethrough; spindle means axially moveable in the bore for engaging the cutter head with the material; a cutting stylus mounted at one end of said spindle for rotation with respect thereto, said cutting stylus having a cylindrical shank portion defining an axis of rotation and a cutting blade portion, said cutting blade portion defined over half of its circumference by a conical surface sloped at about thirty degrees with respect to the axis, generated about a base of about three millimeters and intersected by a planar surface extending at an angle of about six degrees with respect to the axis of the cutting stylus to form cutting edges, said planar surface intersecting said conical surface at a point before the geometric apex of the conical surface, and said cutting blade portion having a length of about six millimeters; means for rotatably holding the stylus with respect to the spindle means, said holding means being attached to the cylindrical shank portion; a foot having a cylindrical bore therethrough closely complementing and extending over a length of the cylindrical shank portion of the stylus for stabilizing the stylus as the stylus rotates in the bore; said foot having a bottom surface surrounding and adjacent to the cutting blade portion of the stylus and extending away from the cutting blade over a relatively small area for holding the material as the material is cut inside of the area; said foot further having a portion for connecting the bottom surface to the axially moveable spindle, said connecting means having radial openings through which cutting scraps pass, and means in said support means for carrying away cutting scraps that pass through the radial openings in the connecting means.