Patent ID: 7641138

Claim:
An auxiliary unit for a pair of paper shredder cutting tools which are positioned inside a paper entrance of a paper shredder and have interleaving blades alternatingly mounted on cutting bars with paper guides separating neighboring blades with an arc-shaped hole at a bottom end of each of the paper guides being hooked on one of two long support rods, comprising two L-shape plates, with an inner surface of an end of each L-shape plate being provided with an arc-shape hole hooked one of the cutting bars of the cutting tool, and a through-hole on each L-shape plate being received onto one of the support rods, thereby transfixing said one of the support rods and said one of the cutting bars of the cutting tool; wherein said two L-shape plates are mounted abutting and reversed left-to-right with respect to each other, and located between neighboring blades of said cutters at a middle portion thereof.