Books – strips – and leaves – Book – element thereof – or accessory therefor
Patent
1979-05-09
1981-01-13
Bell, Paul A.
Books, strips, and leaves
Book, element thereof, or accessory therefor
281 19R, 281 29, 402 3, 402 80P, B42D 106, B42D 300
Patent
active
042446031
ABSTRACT:
Book comprising uncreasable and water-proof cards (6) of a thickness remaining constant in time, these cards being produced from plastics, the text thereon being printed by typographic or offset or other process in a manner known per se. The thickness of the cards is comprised between 0.20 and 0.26 mm and polyvinyl chlorides or polystyrene can be used as plastics. Each card has a configuration comprising converging edges (9, 10) at one end provided with a circular cut-out (7) for a prin connecting all the cards (6).
REFERENCES:
patent: 871610 (1907-11-01), Nash
patent: 1070957 (1913-08-01), Hanby
patent: 2290266 (1942-07-01), Bechtold
patent: 2572703 (1951-10-01), Dennis
patent: 3087498 (1963-04-01), Vogel
patent: 3140883 (1964-07-01), Anthony
patent: 3740128 (1973-06-01), Adler
Bell Paul A.
Prototypon Establishment
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