Erasable marking material and a method for the manufacture thereof
First Claim
1. An erasable marking material comprising a wax-base vehicle and pigment particles, said wax-base vehicle having an oil content of about up to about 10 percent by weight, said pigment particles being substantially uniformly suspended in said wax-base vehicle.
1 Assignment
0 Petitions
Accused Products
Abstract
An erasable marking material with a wax-based vehicle having a substantially uniform suspension of filler particles and pigment particles and a method for its manufacture. The wax-based vehicle is composed of a base wax and at least one supplemental wax. The wax-based vehicle has an oil content of up to about 10 percent by weight. The wax-based vehicle and suspended filler particles exhibit anti-settling properties for the suspension of fluorescent particles. The pigment particles impart luminescent properties to the marker. When rubbed across a surface, the marker deposits the wax-based vehicle and fluorescent particles to producing an erasable luminescent mark.
19 Citations
22 Claims
- 1. An erasable marking material comprising a wax-base vehicle and pigment particles, said wax-base vehicle having an oil content of about up to about 10 percent by weight, said pigment particles being substantially uniformly suspended in said wax-base vehicle.
- 9. An erasable fluorescent marker comprising a substantially uniform mixture of a wax blend, fluorescent particles, and a filler, said wax blend having an oil content of up to about 10 percent, said fluorescent particles substantially uniformly suspended in said mixture, the quantity of said filler particles is up to about 10 percent by weight of said mixture, and the quantity of said fluorescent particles is at least 20 percent by weight of said mixture.
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15. A method of forming a final wax blend that is suitable for molding and extruding of an erasable marker, said method comprising the steps of:
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(a) preparing a blend of waxes, said blend having an oil content of up to about 10 percent by weight; (b) melting said wax blend; (c) mixing a filler material with said wax blend to form a substantially uniform suspension of said filler material in said wax blend; (d) mixing fluorescent pigment particles having a particle size between about 0.5 and 30 microns into said wax/filler mixture to form a final blend, said final blend being a substantially uniform, continuous, non-settling suspension of said fluorescent pigment particles in said mixture of said filler material and said wax blend, said final blend having up to about 10 percent by weight of said filler particles and at least 20 percent by weight of said fluorescent pigment particles. - View Dependent Claims (16, 17, 18, 19, 20)
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21. An erasable marking material comprising a wax-base vehicle and fluorescent pigment particles, said wax-base vehicle having an oil content of about up to about 10 percent by weight, said fluorescent pigment particles being substantially uniformly suspended in said wax-base vehicle.
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22. A method of suspending a fluorescent dye in a wax medium and forming a final wax blend that is suitable for molding and extrusion, said method comprising the steps of:
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(a) preparing a blend of waxes, said blend having an oil content of up to about 10 percent by weight; (b) melting said wax blend; (c) mixing a filler material with said wax blend to form a substantially uniform suspension of said filler material in said wax blend; (d) mixing a fluorescent dye into said wax/filler mixture to form a final blend, said final blend being a substantially uniform, continuous, non-settling suspension of said fluorescent dye in said mixture of said filler material and said wax blend, said final blend having up to about 10 percent by weight of said filler particles and at least 20 percent by weight of said fluorescent dye.
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Specification