Card – picture – or sign exhibiting – Changing exhibitor – Alphanumeric device
Patent
1977-02-25
1978-09-05
Pitrelli, John F.
Card, picture, or sign exhibiting
Changing exhibitor
Alphanumeric device
40472, 340324R, 340334, G09F 1115, G09F 1126
Patent
active
041109228
ABSTRACT:
Apparatus for the display of information comprises an endless band carrying transverse holders each of which carries a plurality of laminae having differently colored front and rear regions. Each lamina may be positioned either to overlap the front region of the succeeding adjacent lamina or to lie behind it so as respectively to obscure or expose this front region. Selection of one or other of these positions of the laminae is secured by passing the band around a pulley of sufficiently small radius so as to spread the holders apart sufficiently for each lamina to be clear of the succeeding lamina and then moving the lamina to one or other position. The laminae may be magnetic and drawn away from the holder by magnets adjacent this pulley into the overlap position. Alternatively the laminae may be driven back against the holder from the overlap position by jets of air. Letters, numerals or other signs may be built up by selective overlapping of the lamina and the information may be displayed statically behind or move across a window as desired. The information may be cleared from the band by passage of the band around a pulley of larger diameter.
REFERENCES:
patent: 3374565 (1968-03-01), Woolfolk
patent: 3605302 (1971-09-01), Muller
patent: 3659366 (1972-05-01), Woolfolk
patent: 3813673 (1974-05-01), Holloman
Pitrelli John F.
Skillington G. Lee
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