Book and cover therefor

A unitary book cover formed from synthetic resin and adapted to be affixed to a book to cover the spine and provide hinged cover panels for books of different thicknesses within predetermined limits, said unitary cover being sheet-like and comprising cover panels of uniform thickness positioned at opposite ends of said cover and the inner edges of said cover panels being spaced apart by connecting means including a central intermediate back panel which is substantially thinner than said cover panels to render said back panel readily flexible to conform it for connection by adhesive to the spine of a book, said back panel having a width equal to the width of the thickest book of a limited range of thicknesses to which said cover is adapted to be affixed, the outermost portions of said back panel comprising lands and the thinness of said back panel adapting said lands thereby to be bent readily around the edges of books of less thickness than the width of said back panel so as to adapt said lands to be affixed by adhesive to limited portions of the outer pages of said book adjacent the spine thereof and thereby minimize the numbers of different sizes of covers necessary to be made to provide covers respectively for books of a limited range of thicknesses, the flexibility of said back panel also being great enough to minimize memory in said back panel to obviate tendencies to cause said land portions thereof when overlying sides of said book to open said book unintentionally, a portion of said connecting means immediately adjacent the inner edges of said cover panels being thinner than said cover panels and comprising hinge means for said cover panels, and headbands formed of the same material as said back panel and integral therewith adjacent opposite ends thereof on the surface to be affixed to the spine of the book, said headbands being substantially thicker than said back panel and shorter than the width of said back panel and the distance between the inner faces of said headbands being substantially equal to the length of the spine of said book and operable to interposition the spine of said book upon said cover accurately between said headbands when assembling the same.