Bookbinding: process and apparatus – Process – Of applying a cover to a book
Patent
1991-07-18
1993-05-11
Bell, Paul A.
Bookbinding: process and apparatus
Process
Of applying a cover to a book
281 29, 281 34, 283 36, B42C 1100, B42D 100
Patent
active
052096246
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a method of interconnecting a first sheet or plate and a second sheet or plate in face to face relationship, especially a method of covering books, such as paperback books.
Within the field of covering paperback books (the term paperback book should in this specification be understood in its broadest sense comprising also telephone books and any printed matter provided with a relatively soft cover) various solutions have been proposed for protecting such books and for enabling the placing of the books in a shelf in an upright position. As an example GB Patent No. 1,480,954 discloses a cover for a book, such as a paperback book, comprising a front cover panel and a back cover panel hingedly connected one to each of the longitudinal edges of an intermediate panel or spine, and an adhesive located in strips adjacent to each of the free edges of the inside faces of said front and back cover panels, the adhesive being covered by a release paper or the like. The book cover according to this patent specification involves a number of drawbacks. The cover is relatively complicated to manufacture and therefore relatively expensive, and the covering operation is difficult to perform, as when the release paper has been removed, and the book and the cover has been brought into mutual engagement, the book will instantly adhere to the adhesive strip, so that a later correction of the alignment of book and cover will not be possible. Furthermore, it is necessary to use different sizes of covers for books of the same format having different thicknesses. An attempt to overcome the problem of using different sizes of covers for books with different thicknesses has been made in U.S. Pat. No. 3,133,750, but the three-part book cover according to that specification is also of a relatively complicated structure, and it is difficult to mount the cover in correct alignment with the book.
U.S. Pat. No. 3,825,963 discloses a method of casing books. In this known method an adhesive layer is applied to substantially the total area of one side surface of one of the sheets to be interconnected, and a sheet of release paper covering the adhesive layer is folded and laid double so that the fold extends along one end of the sheet to which the adhesive is applied, while a free end portion of the release sheet extends beyond the opposite edge of the sheet. The sheets to be interconnected are placed in abutting engagement with the double layer of the release sheet therebetween. Thereafter, the release sheet is removed by exerting a pulling force to the exposed free end of the release sheet. The pulling force necessary to remove the release sheet is rather high, and, therefore, it is normally not possible to remove the release sheet manually without using mechanical means.
The present invention provides an improved method of the above type, said method comprising applying a layer of adhesive to a surface of said first sheet or plate, covering the adhesive layer with a protective peel-off strip, folding a free end portion of the protective strip along a folding line, placing a surface of the second plate or sheet in engagement with the first plate or sheet in a predetermined relationship in which said layer of adhesive is at least partly covered by the second layer or sheet, maintaining the predetermined relationship of said plates or sheets by pressing the first and second plates or sheets into tight mutual engagement, and pulling the folded free end portion of the protective strip so as to remove the protective strip from the adhesive layer while maintaining the close mutual engagement of the plates or sheets, and the method according to the invention is characterized in that said adhesive layer is applied to a narrow zone extending along and adjacent to at least one edge of the first plate or sheet, and that the free end portion of the protective strip is folded so that the folding line defines an acute angle with the longitudinal axis of the protective strip, whereby the free end portion of the protective st
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Patent Cooperation Treat International-type Search Report, dated Aug. 16, 1989.
Bell Paul A.
CREA TO ApS
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