Light colored magnetic rubber
OwnerMax Baermanninventor
Life of this patent
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Abstract
A rubber-like flexible permanent magnet comprised of a mixture of granular, high coercivity, permanent magnet material and a rubber-like flexible binder material. A substantial e.g. 90 percent amount of the permanent magnetic material have a grain size of from 0.125 to 0.3 mm. More magnetic material may be used with the same flexibility. Light colored powders such as titanium oxide, or aluminum can be added or the grains coated with a metallic layer using vacuum deposition or a chemical bath deposition to make the final magnet light in color.
Claims12
A light colored, rubber-like flexible permanent magnet comprised of a mixture of a rubber-like flexible binder, a permanent magnet material of high coercivity, as e.g., barium-, strontium-, or lead ferrite powder, and a material capable of giving the magnet a light color said permanent magnet material consisting essentially of relatively coarse grains having a grain size of 0.06 - 0.35 mm, the grain size mainly ranging from 0.1 - 0.3 mm, and the proportion of fine and finest permanent magnet powder particles, with respect to the grain size, being minimized to a negligibly small amount.
A rubber-like flexible permanent magnet comprised of a mixture of a rubber-like flexible binder and a permanent magnet material of high coercitivity, as e.g., barium-, strontium-, of lead ferrite powder, said permanent magnet material consisting essentially of relatively coarse grains having a grain size of 0.06-0.35 mm, the grain size mainly ranging from 0.1-0.3 mm, and the proportion of fine and finest permanent magnet powder particles, with respect to grain size being minimized to a negligibly small amount.
Dependencies are inferred from the claim text.