Method for bending metal wire comb-like form binding element

Abstract

Device for loosely binding printed sheets to form booklets (10) using a loop-like wire binding element (41) comprises two C-shaping devices (50, 50') and two O-shaping devices (60, 60'). The C-shaping devices are positioned so that the initially flat wire binding element is bent into a C-shape. The O-shaping devices are positioned so that the C-shaped wire binding element is bent into a closed shape.

Description

technical field [0001] The present invention relates to an apparatus and method for bending wire binding elements used in wire comb binding. Background technique [0002] So-called Wire-O TM Method for making booklets from wire binding elements (registered trademark). [0003] A Wire-O wire binding element is defined as a mutually parallel spaced return bent wire having a return length L, a return spacing A and a wire diameter D as shown in Figure 2a, shaped into a Wire by means of a suitable closing device -O ring. [0004] Here, the binding device used in the above-mentioned patent application is constructed in such a way that it is possible to process preformed Wire-O-binding elements having different loop spacings and lengths. In this case, the preformed wire-O-binding element consists of semicircles, viewed from the side, each forming two interconnected C-shaped or ω-shaped structures. After the wire binding element has penetrated the hole in the sheet-like printing...

AI Technical Summary

Problems solved by technology

For bending, forming rollers with a defined diameter are used, so that only wire binding elements can be produced with unchangeable loop spacing and loop length

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