Combination tool assembly for graphic art

A combination tool assembly for graphic art comprising:

• a base made in the shape of a pentagonal prism with a vertical tangent plane on one side thereof, having a rule chamber, a cutter chamber, and pen holes respectively disposed in parallel with said vertical tangent plane and dowel holes on a flat, top surface thereof, said rule chamber being an elongated space laterally and upwardly extended to the outside;
• a top block fitting over said base at the top, said top block having bottom dowels respectively and detachably fitted into said dowel holes on said base and a bottom opening fitting over said rule chamber at the top;
• a folding rule consisted of a plurality of straight rule sections hinged to one another, said folding rule having one end pivoted to said top block within said bottom opening so that the folding rule can be folded up and received inside said rule chamber;
• a triangular scale being as long as the total length of said base and said top block, and having two opposite, longitudinal channels on one side thereof throughout its length, which receive two opposite, flat, longitudinal, outward flanges of said top block and said vertical tangent plane of said base, said triangular scale being detachably attached to said top block and said base at one side in longitudinal direction and incorporated therewith into the form of a hexagonal prism;
• a cutter device fastened inside said cutter chamber and controlled by a slide to move in and out of said base;
• and
• ballpoint pens respectively fastened inside said pen holes on said base and controlled by a respective slide to move in and out of said base.