发明名称 |
Method of and apparatus for removing liquid for webs of porous material |
摘要 |
An apparatus for removing water or other liquids from webs of such porous materials as fibrous paper webs coursing through a papermaking machine without substantially compacting the webs. The web which may be coherent or perforate passes over a sector of a cylinder having preferential-capillary-size pores through its cylindrical-shape porous cover. Preferably, the porous cover comprises hydrophilic material which is substantially non-resilient and which renders the surfaces of the porous cover wettable by the liquid of interest. A portion of the interior of the cylinder may be subjected to a controlled level of vacuum to effect pneumatically augmented capillary flow of liquid from the web; and another portion of the cylinder may be subjected to pneumatic pressure for expelling the transferred liquid outwardly through a portion of the porous cover which is not in contact with the web. The method may comprise controlling the level of vacuum as a function of air flow to maximize liquid removal from a web while substantially obviating air flow through the capillary-size pores of the porous cover of the cylinder. Preferential-capillary-size pores are such that, relative to the pores of a wet porous web, normal capillary flow would preferentially occur from the pores of the web into the preferential-capillary-size pores of the porous cover when the web and porous cover are juxtaposed in surface-to-surface contact.
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申请公布号 |
US4556450(A) |
申请公布日期 |
1985.12.03 |
申请号 |
US19820454808 |
申请日期 |
1982.12.30 |
申请人 |
THE PROCTER & GAMBLE COMPANY |
发明人 |
CHUANG, STRONG C.;THOMPSON, HUGH A. |
分类号 |
D21F3/10;(IPC1-7):D21F5/02 |
主分类号 |
D21F3/10 |
代理机构 |
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