Patent Number: 6,168,104

Title: Shredding module used in a paper shredder

Abstract: The present invention provides a shredding module of a paper shredder that can cut more paper with less noise. The shredding module comprises two parallel rotatable shafts and two sets of circular shredding knives installed separately on the two rotatable shafts. Each of the shredding knives is made by punching a thin metal plate with a punching die. The shredding knife comprises a circular plate with a plurality of saw teeth around its circular edge, a circular recess on the circular plate, and a mounting hole positioned at the center of the circular plate. The peripheral portion of the concave side of each shredding knife is rotatably engaged with the peripheral portion of the concave side of a corresponding shredding knife mounted on the other rotatable shaft for cutting intervening paper. Each of the shredding knives further comprises a sloping edge on the circular edge of the convex side for sharpening the saw teeth so that the shredding module can cut more paper with less noise.

Inventors: Lin; Shin-Fu (Taipei Hsien, TW), Wen; Yung Feng (Taipei Hsien, TW)

Assignee: Primax Electronics Ltd.

International Classification: B02C 18/14 (20060101); B02C 18/18 (20060101); B02C 18/06 (20060101); B02C 18/00 (20060101); B02C 018/16 ()

Expiration Date: 01/02/2018