U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Automatic cross-directional control zone alignment for sheetmaking systems

Patent 5400258 Issued on March 21, 1995. Estimated Expiration Date: Icon_subject September 3, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

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Cross-directional control of sheetmaking systems
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Issued on: 10/23/1990
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More ...

Inventor

Assignee

Application

No. 115594 filed on 09/03/1993

US Classes:

700/129, Profile analyzer or controller73/159, SHEET, WOVEN FABRIC OR FIBER162/198, With measuring, inspecting and/or testing356/429, BY MONITORING OF WEBS OR THREAD356/431Including transverse scanning

Examiners

Primary: Envall, Roy N. Jr.
Assistant: Trammell, Jim

Attorney, Agent or Firm

International Classes

G06F 015/46
G01L 005/04
D21F 011/00
G01N 021/84

Abstract

A system for aligning control zones with measurement zones in a sheetmaking system having a plurality of actuators arranged in the cross-direction, comprising the steps of: a) bumping at least one of the actuators; b) measuring a profile of the sheet at a substantial distance from the bumped actuators; and c) determining a location of the effect of each of the bumped actuators on the sheet.

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