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:
Jul. 21, 1998
Filed:
Dec. 06, 1995
David A Leeman, Worcester, MA (US);
Steven J Coleman, Marlborough, MA (US);
David J Dziadzio, Belchertown, MA (US);
William K Giguere, North Smithfield, RI (US);
Ronald F Goodnow, Leicester, MA (US);
Thermo Web Systems, Inc., Auburn, MA (US);
Abstract
A method and system of measuring deflected doctor blade angle and loading force of an arrangement including a doctor apparatus operating in connection with a rotating cylinder, the apparatus having a doctor blade and a support member which pivots about at least one pivot point in response to an externally applied force for applying the doctor blade to a contact point on the cylinder. The arrangement corresponds to a kinematic model of linkages including a first link defined between the at least one pivot point and the contact point, a second link defined between the contact point and the center of the cylinder, and a third link defined between the center of the cylinder and the at least one pivot point. The method includes measuring the angle between a selected pair of the links; determining the remaining angles between the links as a function of the measured angle; determining an undeflected blade angle which corresponds to an angle between the doctor blade and a tangent line through the contact point on the cylinder, the undeflected blade angle being a function of the determined angle between the first and second links; measuring the externally applied force; ascertaining the blade load as a function of moment balances of the measured angle and the measured externally applied force; and ascertaining the deflected blade angle as a function of the undeflected blade angle and the blade load.