Bookbinding by Inserting a Helical Plastic Coil into the Aligned Holes at the Edge of the Book

摘要

A helical coil is inserted into holes at an edge of a book by a machine which is adjustable for different diameters of coil. The face of the book sits on a platen and the coil is driven by a roller while the edge of the book is supported on a plurality of spine formers having an arced surface for shaping the edge of the book and an end of the book is engaged by a side lay member at an angle to incline the holes at the angle to receive the turns of the coil. The flat spine formers are carried on supports which rotate so as to allow the turns of the coil at the pitch angle to pass the spine formers. For different book thickness and coil diameter, the arced shape of the spine formers, the spine former angle and the lay angle are changed manually.

主权项

1. A method for inserting a plastic pre-formed helical coil into aligned holes at an edge of a collated book for binding the book,
the book having two opposed faces and two opposed ends between which the edge extends, the helical coil having a plurality of turns extending around an axis of the coil at a pitch angle inclined to a radial plane of the axis; the method comprising: engaging one of the opposed faces of the collated book with a support surface of a platen having an edge at which the edge of the book is presented; supporting the helical coil at the edge of the platen and engaging the coil with a drive roller for rotating the helical coil about an axis of the coil parallel to the edge of the platen; engaging the edge of the book with a plurality of spine formers arranged at spaced positions along the edge of the platen, each spine former extending across the edge of the book and having an arced surface with an arced shape for shaping the edge of the book into the arced shape so that each of the holes follows a required arc of the hole for receiving the coil; engaging one of the two opposed ends of the book with a side lay member so as to form said end into an inclined surface at a lay angle to a line at right angles to the platen so as to incline the holes at the angle to receive the turns of the coil; arranging the spine formers on spine former supports at a spine former angle to a line at right angles to the faces of the book so as to allow the turns of the coil at said pitch angle to pass the spine formers; and, for different thickness of books and different diameter of coils, changing the arced shape of the spine formers, changing the spine former angle of the spine formers and changing the lay angle of the side lay member.