Importance

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Abstract

Display apparatus for magnetic securement to a smooth surface of a ferromagnetic or paramagnetic object comprises a support structure and a display surface carried by said support structure, the apparatus having a magnetic arrangement including a magnet carried by said support structure positioned for developing a force of magnetic attraction to said object with said display surface presented for display purposes. The apparatus includes a layer of elastomeric material associated with the magnet and adapted for being interposed between the magnet and the object surface with an area of the material maintained in contact with the surface by force of magnetic attraction. The material is selected from the group consisting of plasticized polyvinyl chloride, plasticized polyvinyl acetals, and vulcanizing silicone rubber. The area of such material in contact with the object surface develops high intrinsic lateral adherence to such surface for preventing the apparatus from moving laterally across the surface in response to high forces tending to laterally displace the apparatus. The apparatus, accordingly, makes synergistic use of both magnetic forces and peculiar characteristics of the elastomeric material to achieve unexpectedly high lateral adherence.

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First Claim