The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 24, 2009
Filed:
Dec. 01, 2006
Kent Chen, Shanghai, CN;
Kent Chen, Shanghai, CN;
Aurora Office Equipment Co., Ltd. Shanghai, Shanghai, CN;
Abstract
A two-way self-lock paper shredder has a functional switch (), a shredding mechanism (), a control circuit power source () electrically connected to the said functional switch (), as well as the following control circuits: a CPU (), a motor-driving circuit (), a reverse detection circuit (), a paper-in detection circuit (), and an unlocking circuit (). If there is neither an input of paper-in signal nor an input of reverse signal after the paper is shredded, the said paper-in detection circuit () will transfer a self-lock signal to said CPU () and then the CPU () begins timing. When the duration of said self-lock signal exceeds the preset value, the CPU () will shut off the motor-driving circuit () and the paper shredder will be self-locked. The aforesaid unlocking circuit () contains an unlocking key, and reset of the said unlocking key can unlock the paper shredder. The present utility model enhances the safety of the paper shredder efficiently, so as to avoid unnecessary hidden trouble.