Education and demonstration – Means for demonstrating apparatus – product – or surface... – Chalkboard or equivalent means having easily erasable surface
Patent
1993-06-22
1995-05-30
Mancene, Gene
Education and demonstration
Means for demonstrating apparatus, product, or surface...
Chalkboard or equivalent means having easily erasable surface
434274, 434267, 446134, 446129, B43L 100
Patent
active
054197066
ABSTRACT:
Apparatus for forming an image on a scanner includes a scanning screen formed of ferrofluidic material and one or more magnetic elements shaped to form a defined peripheral outline(s). The magnetic elements are disposed on one side of a surface and are not visible from the opposite side of the surface. By locating the scanner on the opposite side of the surface, the magnetic flux lines of the magnetic elements orient the magnetic particles of the ferrofluidic screen and alter its light transmission characteristics of the screen whereby an image of the outline of the magnetic elements is provided.
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Levy Richard C.
Maddocks Richard J.
Mancene Gene
Smith Jeffrey A.
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