Claims
- 1. A method for controlling paper tension in a paper manufacturing apparatus comprising the steps of:
- driving a paper web across a paper path in said paper manufacturing apparatus;
- projecting an energy beam onto a surface of the web along a line which is substantially perpendicular to the web which energy beam is reflected by the web;
- detecting the energy beam reflected by the web with a noncontacting sensor to provide an indication of the spatial position of the web and enable measurement of the frequency and amplitude of flutter in said driven paper web; and
- adjusting the tension in said paper web in response to variations in the spatial position of the web, to maintain said flutter within a predetermined range of frequency and amplitude.
- 2. The method of claim 1 wherein said tension is adjusted by the additional step of:
- varying the velocity at which said paper web is driven at one end of said paper path.
- 3. The method of claim 1 wherein said paper web is supported by rollers at each end of said paper path and said tension is adjusted by the additional step of:
- varying the effective length of said paper path.
Parent Case Info
This is a division of application Ser. No. 422,001 filed Sept. 23, 1982.
US Referenced Citations (4)
Divisions (1)
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Number |
Date |
Country |
Parent |
422001 |
Sep 1982 |
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