| 摘要 |
The invention relates to an adjustable system of drainage chambers in a double-wire former. The double-wire former comprises a double-wire zone, in which a wire loading unit 23 has been arranged inside one wire loop 20, in which unit there are loading strips 26, which can most suitably be loaded with the pressure Pk of a pressure medium, and drainage and guide strips 36, which function opposite these inside the second wire loop 10. In the former, one or more drainage chambers 15A, 15 have been arranged inside the upper wire loop 10, which chambers are connected to a drainage channel 14A or channels 14a, 14b, 14c, 14d, by way of which the quantities of water coming from the web W can be removed through the upper wire 10 via the hollow spaces 36R of the strip system 36, which acts against the inner surface of the upper wire or corresponding loop. The negative pressure that prevails in the hollow spaces 36R of the drainage and guide strips 36 of the upper wire 10 or equivalent is designed to be adjustable by means of the flow resistance of throttle slide valves 33a, 33b in association with the said hollow spaces 36R and/or by means of the adjustment of the replacement air Ain, that can be fed to the space in connection with the said hollow spaces 36R. <IMAGE>
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