BLADE ASSEMBLY FOR PAPER SHREDDER
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United States of America Patent
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N/A
Issued Date -
Feb 9, 2012
app pub date -
Aug 5, 2010
filing date -
Aug 5, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A blade assembly for paper shredder consists of a first blade and a second blade combined back to back. Each blade has a circular blade flank formed by punching a thin sheet metal. The blade flank has a hole at its center and integrally extends outwards with at least two cutting edges. Each cutting edge has a base portion extended from the blade flank outwards and on the same plane as the blade flank, a surface portion bent from the base portion to the back of the blade flank and perpendicular to the blade flank, and a tip portion formed between the base portion and the surface portion. The blade flank is integrally formed with several ribs protruding towards the blade flank. A portion of the rib is formed beneath the tip to support the cutting edge and to enhance its strength.
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