Method and apparatus for wetting the web in paper making machines
OwnerKarl H. Winheiminventor
Life of this patent
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Abstract
The moisture content of a web of newsprint paper which runs from the drying unit to the collecting station of a paper making machine is increased in several stages by atomized water issuing from rows of spraying devices followed by cylindrical members which distribute the particles of water in the material of the web. The rate of water discharge from each spraying device is adjustable so as to compensate for eventual differences between the moisture content in the marginal portions and the moisture content in the median portion of the web.
Claims24
Apparatus for wetting a continuous web of at least partially dried paper which is moved in a paper making machine along a predetermined path and in a predetermed direction toward a collecting station where the web is converted into a roll, comprising a plurality of wetting units including a first wetting unit adjacent to a first portion and a second wetting unit adjacent to a second portion of said path, said second portion of said path being located downstream of said first portion, as considered in said direction, and each of said units including a plurality of spraying devices forming at least one row extending substantially transversely of the respective portion of said path, each of said devices having means for directing at least one spray of atomized liquid against one side of the moving web and each wetting unit further comprising a substantially cylindrical member located downstream of the respective spraying devices, as considered in said direction, and engaging the freshly moistened side of the web to distribute the liquid in the material of the web.
A method of treating a continuous web of paper in a paper making machine, particularly a web of newspring paper, comprising the steps of drying the web;
- transporting the dried web along a predetermined path and in a predetermined direction toward a station where the web is converted into a roll;
- and increasing the moisture content of the web in a plurality of successive stages in a plurality of different portions of said path, each of said stages comprising spraying atomized liquid onto one side of the moving web in the respective portion of said path and thereupon mechanically distributing the freshly sprayed liquid at the respective side of the web to promote the penetration of liquid into the material of the web.
Dependencies are inferred from the claim text.