(19)
(11) EP 2 399 674 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
07.03.2012 Bulletin 2012/10

(43) Date of publication A2:
28.12.2011 Bulletin 2011/52

(21) Application number: 10177201.0

(22) Date of filing: 16.09.2010
(51) International Patent Classification (IPC): 
B02C 18/00(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
Designated Extension States:
BA ME RS

(30) Priority: 03.06.2010 CN 201010197833
10.09.2010 US 879960

(71) Applicant: Aurora Office Equipment, Co. Ltd.
Shanghai 201818 (CN)

(72) Inventor:
  • Guanglong, Chen
    201822, Jia Ding District. Shanhai (CN)

(74) Representative: Savic, Bojan 
Savic Patentanwälte Arnulfstrasse 37
80636 München
80636 München (DE)

   


(54) Thickness detecting safety shredder


(57) A thickness detecting system for a paper shredder having a lever arm extending into the shredder's throat. One or more sensors may be in communication with the lever arm and configured to measure the rotation of the lever. A first maximum thickness and second maximum thickness may correspond to the paper inserted into the throat before and during shredder, respectively. Circuitry may reverse the motor when the thickness is exceeded to ease the removal of the paper and to prevent further shredding. A touch structure and the preferential power supply switch may be used to engagingly interact with each other, so that the motor can be switched off when the plate is selectively positioned to close the paper feed opening, can be switched on when the plate is selectively positioned to open the feed opening, and can be switched off when unexpected items are introduced into the feed opening.







Search report