The invention relates to a method for bookbinding printed matter (text-blocks) that has a paper case (8) internally and a zipper closure (9), which comprises application of a cold glue on the spine (joint) (5), the spine (joint) being reinforced by fabric and sewing (6), application of a silicone glue in the holes (3) of the thread seam, application of a special tape (4) in the interior of the spine (joint) for protection against the cold glue and an incorporated bookmark (7) with creasings.

The various available forms of printed matter (text-blocks) which are produced by applying cold glue on the spine (joint) frequently present the problem that the glue penetrates in the interior of the printed matter (text-blocks) through the holes (3) of the thread seam. This results to page tearing when opening and poor quality. Also, available forms of printed matter (text-blocks) which have internal cases in which pieces of paper (notes, cards, etc.) are inserted do not ensure that the pieces of paper will be retained when inverting the printed matter (text-blocks) upside-down.

US 2006/061083 A1 discloses a book binding method comprising the features of the preamble of claim 1.

By using a special tape (4) in the interior of the spine (joint), which has been glued with cold glue, the pages do not stick together, and the product may be folded due to the thread seam. Also, by applying silicone glue in the holes (3) of the thread seams, the glue is prevented from entering the interior of the printed matter (text-blocks). Finally, by using a zipper (9) on the outer edge of the covers, the items in the inner paper case (8) are retained. Firstly, the main body is folded. Then, the end papers are glued, the end papers being a four-page unit at the front side and a four-page unit at the back side and aiding in the better opening of the product. The covers are then cut (one at the front and one at the back). On the cover an incision (1) is made in order to position decorative material (2) (figure 1). Thereafter the covers are connected with the end papers. Then the assembling of the body follows. During this stage, perforation is effected and holes for dossiers are created. Then sewing is effected and silicone glue is applied in the holes (3) on the outside of the spine (joint) (5) (figure 2). Then, the spine(joint) (5) is internally lined with a special tape (4) (figure 3). Then cold glue (5) is applied on the spine (joint) (5) to reinforce the bookbinding, which provides flexibility and strength to the multiple folds of the product without damaging the interior. The spine (joint) (5) is lined with a further material (fabric), screen-printing on the spine (joint) is then performed and a seam (6) is made in order to increase the strength on the spine (joint) (5) during folding of the product and to provide a better appearance (figure 4). The final trimming on the printed matter (text-blocks) is effected and a bookmark (7) is glued, on which creasings have been previously made (figure 5a, 5b). Thereafter, a paper case (8) on the inner side of the back cover (figure 6) is placed. Finally, on the outer side of the front cover and the back cover, respective zippers (9) are sewn (figure 7).

The product may be a book, a notebook having a single section or multiple sections (2, 3 or four), as well as diaries, notebooks, phone indexes etc.