Device at a Binder

A device for fastening prongs in binders, in which the prongs are secured to prong plates arranged to be fastened to inner sections of a binder spine, comprising:

• fastening mechanisms arranged in rows along the binder spine sections;
• hollow supplementary fastening devices located on respective prong plates;
• and
• sprung tongues that are arranged on the prong plates and that receivably bear each of their sides against a projecting receiving part;
• wherein the fastening mechanisms are releasably connectable to the supplementary fastening devices, are projecting hook-shaped, are secured to the binder spine, and are arranged to be received in the supplementary fastening devices;
• the fastening mechanisms are distributed along the prong plates adapted to a height (H) of the binder so that they can be positioned anywhere at a required level along the binder spine and so that the fastening mechanisms and fastening devices, interacting with each other, continue to connect a required number of prong plates at the required level;
• and the fastening mechanisms, sprung tongues, prongs, and prong plate are formed of plastic material on a common plastic part.