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Wire Binder Binding Machines

Wire binding is also known as Twin Loop or Double Loop binding and involves the use of a "C" shaped wire spine that is squeezed into a round shape using a wire closing device. 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 larger 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 vice 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.



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