Education and demonstration – Means for demonstrating apparatus – product – or surface... – Chalkboard or equivalent means having easily erasable surface
Patent
1987-05-19
1989-01-10
Picard, Leo P.
Education and demonstration
Means for demonstrating apparatus, product, or surface...
Chalkboard or equivalent means having easily erasable surface
358256, 358285, H04N 110
Patent
active
047971070
ABSTRACT:
A copyable blackboard has: a written member on which a picture including such as characters or figures is depicted a first carrier for carrying the written member, a light source for irradiating light to the picture on a portion of the written member located at a predetermined position on the written member to generate an optical signal corresponding to the picture, a photosensitive member which receives the optical signal from the written member and produces a latent image of the picture thereon. A second carrier is provided for carrying the photosensitive member, an image developing element for developing the latent image on the photosensitive member itself or on a copy paper to obtain a copy of the picture, and a control element for controlling the first and second carriers the photosensitive member and the light source.
REFERENCES:
patent: 4399209 (1983-08-01), Sanders et al.
patent: 4440846 (1984-04-01), Sanders et al.
patent: 4587568 (1983-05-01), Takayama et al.
patent: 4600951 (1986-07-01), Blitchington
patent: 4667254 (1987-05-01), Araki et al.
Hatta Naoyuki
Izaki Takeshi
Sangyoji Kazuo
Sawada Akihiro
Yamamoto Takemi
Brother Kogyo Kabushikikaisha
Picard Leo P.
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