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US 5,843,329 AGranted
Magnetic paint or ink additive
OwnerDayton J. Deetzinventor
Life of this patent
Estimating the term…
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OwnerDayton J. Deetzinventor
Estimating the term…
Magnetic paint or ink additives are formulated from ferromagnetic particles, preferably iron powder, having a mixed particle range of from about 0.01.mu. to about 297.mu., and preferably to about 250M and more, preferably from about 0.01.mu. to about 37 to 44.mu.; 6 to 20.mu. particles are used in one latex-based embodiment. Preferred additives are formulated by blending the particles with a surfactant, a surfactant mixture, or a surfactant and alcohol mixture in amounts sufficient to suspend the particles; a polyvinyl acetate polyer is used in one embodiment. The additives may be blended with any oil-, latex-, or lacquer-based paint, ink, or coating to form a magnetic paint or coating having a viscosity substantially similar to the paint or ink containing no particles and/or additive. Surfaces such as paper, cloth, wood, wallboard, sheet rock, foam, foam board, plywood, plastic, fiberboard, and the like so coated may be cut with conventional woodworking tools, scissors or knives.
A coating additive composition comprising ferromagnetic particles ranging from greater than 2.0.mu. to about 250.mu., polyvinyl acetate, and at least one surfactant added in an amount sufficient to wet the particles.
A substrate coated with a magnetic coating comprising a paint or ink, or other coating, and ferromagnetic powder having a size range from greater than 2.0.mu. and 250.mu. and formulated to provide a dry mill finish of about 1 to 6 mils and containing between about 0.01 and 3 grams of ferromagnetic particles per square inch.
A coating additive composition comprising ferromagnetic particles ranging from greater than 2.0.mu. to about 250.mu., a surfactant, and a resin selected from the group consisting of a phenolic resin, a polyurethane, an acrylic, and mixtures thereof.
A magnetic coating comprising an additive having iron in a particle size ranging from greater than 77.mu. to 250.mu. added in an amount sufficient to yield between about 500 to about 8000 grams per gallon of coating.
A magnetic product comprising a substrate coated with a coating containing particulate iron having a size range from greater than 2.0 to about 74 microns, which is formulated to provide a magnetic surface having a dry mill thickness of between about 1 and about 6 mils and containing between about 0.01 to about 3 grams of ferromagnetic particles per square inch, such that the product can be cut with conventional woodworking tools, scissors, and knives.
Dependencies are inferred from the claim text.