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:
Nov. 06, 1990
Filed:
May. 10, 1988
Applicant:
Inventor:
Dong D Nguyen, Lawrenceville, NJ (US);
Assignee:
Union Camp Corporation, Wayne, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21F / ;
U.S. Cl.
CPC ...
162262 ; 73 377 ; 73159 ; 162256 ; 162263 ; 226100 ; 242 57 ;
Abstract
An apparatus and method for determining the frequency and amplitude of flutter of a moving web in a web manufacturing operation, is shown to include a sensor for sensing the pressure of air in a region proximate the web and for generating a pressure signal reflective of the air pressure and a signal processor, connected to receive the pressure signal, for determining the amplitudes and frequencies of the flutter from the pressure signal and for generating an indication signal representative of the flutter amplitude and frequency.