A binder is a large, sturdy folder or file made of cardboard, wood, or plastic that uses paper clips to archive punched papers and documents. Binders have different standards in terms of paper hole spacing, and depending on the size may have a capacity of two hundred to five hundred sheets. The binder was invented in 1886 by the German Friedrich Sonnen.
The word Zonken is not used in any of the English, German or French languages. Zonken is the name of the German inventor of this product, Friedrich Soennecken, who first registered it in 1886 in Bonn, Germany.

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