A method for producing a book-like security and/or value document includes: A) at least two layers of a data sheet formed from organic polymeric materials are brought together, one inner layer having smaller dimensions than at least one adjacent layer, the data sheet forming a gap or a step along an edge, the gap/step being filled with an auxiliary piece having a thickness which substantially corresponds to the thickness of the inner layer and formed from a material which is not laminable with the at least two layers, B) all layers of the stack of step A) are laminated with each other, not with the auxiliary piece, C) auxiliary piece is removed, D) a data sheet region of a cover tab is introduced into the gap/step and connected with the data sheet, E) a cover region of the cover tab is bound into the cover of the security and/or value document.

Folding device to make two parallel folds in a leaf whereby the device contains two clamps with a folding edge, each formed by two clamping bars with jaws which can be moved relative to each other between an open position and a closed position and whereby the clamps to feed the leaf are arranged opposite each other with their folding edges parallel and facing each other at a distance equal to the desired distance between the folds to be made and whereby the folding device also a carrier to move the clamps in their closed position relative to each other in such a way that one of the clamps with its folding edge makes a circular movement around the folding edge of the other clamp to form both parallel folds at the folding edges of both clamps.

A process for the production of books (22) with digital printing from signatures, in which the book comprises signature groups (33), each formed with basic sheets (34), are parts of respective signature sheets (42). The process employs a manufacturing system (21) which includes a transversal cutting equipment (41) for cutting transversally the 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.

A bound collection of leaves having a spine and a method of its manufacture are disclosed. Each leaf of a first plurality of leaves of the bound collection includes a first pattern of tabs by which that leaf is bound. The tabs of the first pattern are distributed along a binding axis of that leaf that is parallel to a spine axis of the spine. Each leaf of a second plurality of leaves of the bound collection includes a second pattern of tabs different than the first pattern by which that leaf is bound. The tabs of the second pattern are distributed along a binding axis of that leaf that is parallel to the spine axis. Each tab of the first pattern and second pattern of tabs extends in a direction orthogonal to the binding axis from within an unbound region to a binding-side edge of that leaf.

A bound collection of leaves having a spine and a method of its manufacture are disclosed. Each leaf of a first plurality of leaves of the bound collection includes a first pattern of tabs by which that leaf is bound. The tabs of the first pattern are distributed along a binding axis of that leaf that is parallel to a spine axis of the spine. Each leaf of a second plurality of leaves of the bound collection includes a second pattern of tabs different than the first pattern by which that leaf is bound. The tabs of the second pattern are distributed along a binding axis of that leaf that is parallel to the spine axis. Each tab of the first pattern and second pattern of tabs extends in a direction orthogonal to the binding axis from within an unbound region to a binding-side edge of that leaf.