Book, more particularly pocket dictionary
AssigneePrototypon Establishment
InventorLaura De Monti
Life of this patent
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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).
Claims6
A printed pocket dictionary constructed of an assembly of superposed elongated cards printed on both sides and two conforming external covers, each card and cover radially rotating in its respective plane about a pin threaded through a circular cut-out provided at an end of each of the cards and covers on their axial line, and each card and cover remaining partially in contact with adjacent card or cards, characterized in that:
- (a) each card is formed of a slidable synthetic resin of the group comprising polyvinylchloride and polystyrene, has at said end, wherein the circular cut-out is provided for the pin, linear edges converging to form a curved apex, and the circular cut-out for the pin is located entirely in the zone with said converging edges such that the minimum width of the margin around said cut-out is at most equal to three quarters of the diameter of said cut-out;
- and
- (b) the thickness of each card is at least 0.10 mm.
Dependencies are inferred from the claim text.