Method for producing books

#This invention relates to a machine and method for producing books characterized by signatures joined at a folded back.

#This invention was prompted by consideration of the disclosure in application Ser. No. 441,056 filed Feb. 11, 1975, now U.S. Pat. No. 3,966,185 and one object of the present invention is to increase productivity, possible under the machine of that patent, by producing two folds in the signature pre-forms (juxtaposed sheets) which are joined by glue. Another object of the present invention is to so produce the folds that one fold becomes the back of the book to be stitched while the other fold contains the line of glue and is so located as to be separated by a trimming knife along with a lap margin.

#In the drawing:

#FIG. 1 is a sectional view of the roll stand and the knife delivery means;

#FIG. 2 is a partly diagramatic and partly schematic drawing of the means employed under the present invention to make signatures and produce books therefrom;

#A large portion of the disclosure repeats part of the disclosure in application Ser. No. 441,056, filed Feb. 11, 1974, now U.S. Pat. No. 3,966,185. One difference resides in the manner of folding and trimming.

#FIG. 1 is a schematic, partly diagramatic plan of a system for producing glue-backed books from rolled webs. The rolls of web material, pre-printed in page relation, are assembled at a roll stand station. As shown in FIG. 1, the webs are withdrawn from individual rolls, glued, collated, and fed to a knife delivery station where the registered webs are severed transversely. The product obtained at the knife delivery station may be viewed as a multiple page pre-form signature, one not yet folded, but in any event a multiple page assembly of sheets, identified by reference character 250 in FIG. 2. This signature pre-form is advanced to a transfer station, FIG. 2, and from thence at right angles along a different path to a folder station by way of a transfer conveyor. The sheet material transferred to the folder station is essentially in the same form, 250.

#The juxtaposed sheets are folded into signature form and fed to a book opener station, FIG. 2, thereby preparing the book for delivery to a saddle conveyor.