Process and system for the production of books with digital printing from a continuous paper strip and respective book

摘要

A process for the production of books (22) with digital printing on a continuous paper strip (23), in which the strip defines book sections in sequence, with signature groups (33), each formed with basic sheets (34); the process employs a manufacturing system (21) which includes a transversal cutting equipment (41) for separating signature groups (33) as signatures sheets, and transversal and longitudinal folding equipment (46) for the formation of respective signatures (48); for a book with at least a sheet section devoid of text and/or figures in a last signature group, the method provides: a) identify a reduced signature group (59) including a number of sheet sections having at least a page with text and/or figures; b) cut the paper strip (23) to separate the reduced signature group as reduced signature group; c) actuate the transversal folding equipment (46) limited to the sheet sections having at least a page with text and/or figures and skipping the actuation of the transversal folding equipment (46) for a single sheet section; and d) actuate the longitudinal folding equipment (47) for folding longitudinally the reduced signature group.

主权项

1. A process for production of books with digital printing on a continuous paper strip, wherein said continuous paper strip defines a longitudinal axis and book sections in sequence along said longitudinal axis, each book section is associated to a book and includes a number of signature groups, and each signature group is formed with a given number of basic sheets of the book, and wherein said process employs a system for manufacturing books comprising a transversal cutting equipment for cutting the continuous paper strip transversally to the longitudinal axis in order to separate the signature groups as signature sheets, a transversal folding equipment for folding transversally the signature sheets with respect to the longitudinal axis, and a longitudinal folding equipment, for folding longitudinally signature sheets transversally folded in order to form respective signatures preparatory to a basic book block, said process comprising the following steps:
a) identifying in book section sheet sections formed by side by side basic sheets, separable from the continuous paper strip through a single cut and a reduced signature group including a number of sheet sections having at least a page with text and/or figures, for a book in which a part regarding a last signature group has at least a sheet section devoid of text and/or figures; b) actuating the transversal cutting equipment for cutting the continuous paper strip so as to separate, with respect to the last signature group, as reduced signature sheet, the sheet section or the book section sheet sections having at least a page with text and/or figures; c) processing the reduced signature sheet by actuating the transversal folding equipment limited to the book section sheet sections having at least a page with text and/or figures or skipping the actuation of the transversal folding equipment for a single sheet section; d) actuating the longitudinal folding equipment, for longitudinal folding the reduced signature sheet, as signature with reduced number of sheets; and e) stacking the signature with reduced number of sheets on the other signatures for completing the basic book block.