Method for processing a web of material using individually controllable zones

Patent 5685955 Issued on November 11, 1997. Estimated Expiration Date:

November 28, 2015. 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.

Abstract Claims Description Full Text

Patent References

3307215

3713966

3782873

Sheet material characteristic measuring, monitoring and controlling method and apparatus using data profile generated and evaluated by computer means
Patent #: 3936665
Issued on: 02/03/1976
Inventor: Donoghue

Apparatus for drying a moving web having movable dryer modules
Patent #: 4514913
Issued on: 05/07/1985
Inventor: Stephansen

System and process for detecting properties of travelling sheets in the cross direction
Patent #: 4903528
Issued on: 02/27/1990
Inventor: Balakrishnan, et al.

Dual mode cross-directional moisture control
Patent #: 5093795
Issued on: 03/03/1992
Inventor: Lewis

Multiple steam applicator controller
Patent #: 5122232
Issued on: 06/16/1992
Inventor: Lyman, et al.

Dual mode cross-directional moisture control
Patent #: 5262955
Issued on: 11/16/1993
Inventor: Lewis

Electronic flow modulated cross direction moisture actuator
Patent #: 5286348
Issued on: 02/15/1994
Inventor: Perin

More ...

Inventors

Assignee

Voith Sulzer Finishing GmbH

Application

No. 563542 filed on 11/28/1995

US Classes:

162/198, With measuring, inspecting and/or testing73/159, SHEET, WOVEN FABRIC OR FIBER162/252, Automatic control162/262, Electric controls or systems162/263, Measuring, testing, inspecting, indicating or illuminating700/122, Continuous material having indeterminate length (e.g., web, strand, strip, or sheet)700/127, Sheet making (e.g., paper product)700/128, Paper machine or subsystem control700/129Profile analyzer or controller

Examiners

Primary: Czaja, Donald E.
Assistant: Fortuna, Jose A.

Attorney, Agent or Firm

Darby & Darby

Foreign Patent References

2818011 C2 DE. 04/24/1978
3410136 A DE. 03/24/1984
42 38 037 DE. 04/24/1993
42 39 845 DE. 05/24/1993
42 39 270 DE. 05/24/1994
2 329 120 DE. 01/24/1997
54-139865 JP. 10/24/1979
56-128395 JP. 10/24/1981
56-128394 JP. 10/24/1981
60-209092 JP. 10/24/1985
1-67036 JP. 04/24/1989

International Classes

D21G 001/00
G05D 005/00

Foreign Application Priority Data

1994-12-01 DE

Abstract

A method and apparatus for processing a longitudinally traveling web of material using a sheet treating device positioned in a transverse direction relative to the web. The sheet treating device having a plurality of individually controllable zones for controlling a target parameter of the web, for example, the thickness, bulk, dampness, smoothness or sheen of the web. In conjunction with the sheetmaking device, a measuring instrument for measuring an actual value of the target parameter is placed downstream of the sheet treating device. An actual profile that is determined by the actual values is compared with a desired profile, and the zones of the sheet treating device are adjusted such that the discrepancies between the two profiles are minimized. To improve the matching of the actual profile to the desired profile even further, the web and/or the sheet treating device are shifted relative to the other in the transverse direction to minimize the discrepancies between the two profiles.