Copying apparatus

Details Copying apparatus Copying apparatus

1990-07-13

1992-01-28

Bahr, Robert

Education and demonstration

Means for demonstrating apparatus, product, or surface...

Chalkboard or equivalent means having easily erasable surface

B41L 112

Patent

active

050839250

ABSTRACT:
A copying apparatus is provided in which a transparent soft sheet is mounted to an upper face of an opaque sheet so as to be in contact with and out of contact with the opaque sheet. The copying apparatus comprises a closure frame, a box-like body having a smooth upper face, the closure frame being mounted to the box-like body in an openable and closeable manner, a carbon-paper press frame superimposed upon a rear face of the closure frame in an openable and closeable manner, and a pair of roller means mounted respectively to one side of the box-like body and to one side of the closure frame in facing relation to each other and a buzzer. The opaque sheet is made of a soft material and is stretched upon the closure frame. At least one of the pair of roller means is connected to a roller rotating unit and the buzzer and the roller rotating unit are connected to an electric power source through a switch.

REFERENCES:
patent: 2451979 (1948-10-01), Rosenblum
patent: 4001665 (1977-01-01), Wisner et al.
patent: 4346657 (1982-08-01), Okutsu

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