System for drying a web and process
AssigneeVoith Sulzer Papiertechnik Patent GmbH
InventorsMarkus Oechsle, Frank Wegehaupt
Life of this patent
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Abstract
A process for drying a web provides for guiding a web having a moisture content and subjecting the web to laser radiation to remove at least some portion of the moisture content. A system for drying a web includes at least one laser, a moisture measurement device, and a control device, wherein the control device receives input from the measurement device and influences the at least one laser.
Claims58
A process for drying a fibrous material web to control a moisture cross profile in the web, the process comprising:
- guiding said fibrous material web;
- and
- subjecting said fibrous material web to laser radiation in order to control the moisture cross profile of said fibrous material web.
A process for drying a fibrous material web to control a moisture cross profile in the web, the process comprising:
- guiding said fibrous material web;
- subjecting said fibrous material web to laser radiation in order to control the moisture cross profile of said fibrous material web;
- and
- switching off said laser radiation when a tear in said fibrous material web is detected.
A process for drying a fibrous material web to control a moisture cross profile in the web, the process comprising:
- guiding said fibrous material web;
- and
- subjecting said fibrous material web to laser radiation in order to control the moisture cross profile of said fibrous material web,
- wherein said subjecting occurs predominantly at an end of a drying process.
A process for drying a web to control a moisture cross profile in the web, the process comprising:
- guiding a web having a moisture content;
- and
- subjecting said web to laser radiation to remove at least some portion of said moisture content in order to control the moisture cross profile of said web.
A process for drying a web to control a moisture cross profile in the web, the process comprising:
- guiding a web having a moisture content;
- subjecting said web to laser radiation to remove at least some portion of said moisture content in order to control the moisture cross profile of said web;
- and
- determining said moisture content and controlling said laser radiation in response to said determining,
- wherein said laser radiation is set to a wavelength of at least one of approximately 1.92 μm, 1.60 μm and 1.48 μm.
A process for drying a web to control a moisture cross profile in the web, the process comprising:
- guiding a web having a moisture content;
- subjecting said web to laser radiation to remove at least some portion of said moisture content in order to control the moisture cross profile of said web, said subjecting further comprising providing a controlled amount of radiation to a plurality of longitudinal zones of said web;
- and
- varying said controlled amounts so that different zones of said web receive different amounts of radiation.
A process for drying a web to control a moisture cross profile in the web, the process comprising:
- guiding a web having a moisture content;
- subjecting said web to laser radiation to remove at least some portion of said moisture content in order to control the moisture cross profile of said web;
- and
- detecting a tear in said web and stopping said subjecting in response to said detecting.
A process for drying a web to control a moisture cross profile in the web, the process comprising:
- guiding a web having a moisture content;
- subjecting sad web to laser radiation to remove at least some portion of said moisture content in order to control the moisture cross profile of said web;
- and
- preventing said laser radiation from impacting objects other than said web.
A process for drying a web to control a moisture cross profile in the web, the process comprising:
- guiding a web having a moisture content;
- subjecting said web to laser radiation to remove at least some portion of said moisture content in order to control the moisture cross profile of said web;
- measuring a moisture content of said web;
- communicating said measuring to a control device;
- and
- adjusting said subjecting with said control device.
A process for drying a fibrous material web to control a moisture cross profile in the web, the process comprising:
- continuously guiding a fibrous material web having a moisture content;
- measuring said moisture content;
- communicating said measuring to one of a control device and an array of lasers;
- and
- subjecting said web to a controlled amount of infra-red laser radiation in order to reduce said moisture content;
- monitoring said web for tearing so that said laser radiation is discontinued when a tear is detected,
- wherein said laser radiation is set to a frequency range which in which more energy is absorbed by said moisture than by said web.
A process for drying a continuous fibrous material web, comprising;
- guiding said continuous fibrous material web;
- subjecting said continuous fibrous material web to laser radiation;
- measuring a moisture content of said web;
- communicating said measured moisture content to a control device;
- and
- adjusting said subjecting with said control device.
A process for drying a continuous web comprising:
- guiding a continuous web having a moisture content;
- subjecting said continuous web to laser radiation to remove at least some portion of said moisture content;
- measuring a moisture content of said web;
- communicating said measured moisture content to a control device;
- and
- adjusting said subjecting with said control device.
Dependencies are inferred from the claim text.