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:
May. 22, 2012
Filed:
Mar. 04, 2010
Takahiro Yamamoto, Fuchu, JP;
Kazuhiro Itsumi, Tokyo, JP;
Seiji Ikari, Yokohama, JP;
Takanobu Nishimura, Chigasaki, JP;
Yoshihiko Naruoka, Yokohama, JP;
Toru Todoriki, Kawasaki, JP;
Junji Miura, Naka-gun, JP;
Takahisa Nakano, Kawasaki, JP;
Takahiro Yamamoto, Fuchu, JP;
Kazuhiro Itsumi, Tokyo, JP;
Seiji Ikari, Yokohama, JP;
Takanobu Nishimura, Chigasaki, JP;
Yoshihiko Naruoka, Yokohama, JP;
Toru Todoriki, Kawasaki, JP;
Junji Miura, Naka-gun, JP;
Takahisa Nakano, Kawasaki, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A stiffness detector includes a bending portion configured to bend a paper sheet to be carried. The stiffness detector transmits acoustic waves to an incidence point on an inner surface of the paper sheet which is bent by the bending portion and is carried, thereby exciting Lamb waves. The stiffness detector receives leaky waves of the Lamb waves emitted from a detection point on the inner surface of the paper sheet. The stiffness detector specifies a maximum crest value based on the received signals, and judges whether the paper sheet is an unimpaired sheet based on the specified maximum crest value.