Perfect binding is often used for paperback books. It is also used for magazines typically with higher page counts such as the National Geographic. Perfect bound books usually consist of multipul pages with a cover made from heavier paper, glued together at the spine with a strong glue. The sections are milled in the back and notches are applied into the spine to allow hot glue to penetrate into the spine of the book. The other three sides are then face trimmed, allowing the book to be opened.
Stapling through the centerfold, also called saddle-stitching, joins a set of nested “signatures” into a single issue; most magazines are well-known examples of this type. Magazines are considered short lived when compared with other books, and less durable means of binding them. In general, the cover pages of magazines will be the same as the inner pages this is considered “self-cover.” If there is a slightly heavier cover it is considered “plus cover.” Most magazines are stapled or saddle-stitched.
Saddle-Stitchers are printing postpress machines used to collate and stitch multiple signatures. The machine then trims the stapled signatures so that the booklets may be opened. Numerous companies produce Saddle-Stitchers, however we entrust the Muller Martini.
Wire-O binding is a type of binding that involves the use of a “C” shaped wire spine that is squeezed into a round shape using a wire closing device. Double wire binding allows books to have smooth crossover and is affordable in many colors. This binding is great for annual reports, owners manuals and software manuals. Wire bound books are made of individual sheets, each punched with a line of round or square holes on the binding edge.
This type of binding uses either a 3:1 pitch hole pattern with three holes per inch or a 2:1 pitch hole pattern with two holes per inch. The three to one hole pattern is used for smaller books that are up to 9/16″ in diameter while the 2:1 pattern is normally used for thicker books as the holes are slightly bigger to accommodate slightly thicker, stronger wire. Once punched, the back cover is then placed on to the front cover ready for the wire binding elements (double loop wire) to be inserted. The wire is then placed through the holes. The next step involves the binder holding the book by its pages and inserting the wire into a “closer” which is basically a vise that crimps the wire closed and into its round shape. The back page can then be turned back to its correct position, thus hiding the spine of the book.
Spiral binding is the most economical form of mechanical binding when using plastic or metal. It is commonly used for atlases and other publications where it is necessary or desirable for the publication to be opened back onto itself without breaking or damaging the spine. A number of different varieties exist, though all are produced through the basic principle of a wire helix being wound through a number of holes punched along the spine of the book, providing a hinge with a greater degree of flexibility.
Spiral coil binding uses a number of different hole patterns for binding documents. The most common hole pattern used is 4:1 pitch (4 holes per inch). However, spiral coil spines are also available for use with 3:1 pitch, 5:1 pitch and 0.400-hole patterns.