Apparatus for sharpening crayon marking instruments to form an improved arcuate safety marking tip

摘要

A device for sharpening crayons and other soft marking instruments normally made from waxes, plastics and other soft material which includes a protective ring defining an aperture with a plurality of support members extending longitudinally therefrom. A plurality of sharpening blades extend longitudinally along the support members and are fixedly secured thereto to define a sharpening zone between the support members. Each of the sharpening blades is arcuate along its entire length extending from the protective ring to a base to which the individual support members converge. This arcuate shape is preferably of a parabolic shape to facilitate the sharpening of crayons to a blunt end shape. Debris outlets are defined between the support members and a retaining cup can be secured thereto for collecting debris. The sharpening blades are formed by blade surfaces oriented at approximately 90 degrees with respect to one another and at approximately 45 degrees with respect to the crayon marking instrument being sharpened in order to maximize sharpening and minimize any danger of accidents such as cutting of one's fingers especially by young children.