发明授权
- 专利标题： Device and process for determining the stiffness of sheet-like articles such as bank notes
- 专利标题（中）： 用于确定片状物品如纸币的刚度的装置和过程
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申请号： US875105申请日： 1997-09-12
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公开(公告)号： US6026681A公开(公告)日： 2000-02-22
- 发明人: Bernd Wunderer , Ulrich Schanda
- 申请人： Bernd Wunderer , Ulrich Schanda
- 申请人地址： DEX Munich
- 专利权人： Giesecke & Devrient GmbH
- 当前专利权人： Giesecke & Devrient GmbH
- 当前专利权人地址： DEX Munich
- 优先权： DEX19543674 19951123
- 主分类号： G01N29/12
- IPC分类号： G01N29/12 ; G01N3/32 ; G01N3/34 ; G01N29/14 ; G01N29/22 ; G01N33/34 ; G07D7/00 ; G01L5/04
摘要：
The apparatus for determining the stiffness of sheet material is provided with mechanical means which periodically touch the sheet material, causing it to vibrate. The sounds produced by the vibration are detected by a detector. From the detected sounds an evaluating device determines the stiffness of the sheet material. The sheet material is held or guided in a transport device such that it can yield to the mechanical action within certain limits in the area of contact without being irreversibly deformed.
公开/授权文献
- US4161851A Motor vehicle window assembly 公开/授权日：1979-07-24