Back to results
US 5,897,745 AGranted
Method of wet pressing tissue paper
AssigneeThe Procter & Gamble Company
InventorsRobert Stanley Ampulski, Ward William Ostendorf, Paul Dennis Trokhan
Life of this patent
Estimating the term…
Abstract
The present invention provides method for making a wet pressed paper web. An embryonic web of papermaking fibers is formed on a foraminous forming member, and transferred to an imprinting member to deflect a portion of the papermaking fibers in the embryonic web into deflection conduits in the imprinting member. The web, the imprinting member, and two felt layers, are then pressed in a compression nip with a foraminous backing member to mold and dewater the web.
Claims6
A method of forming a paper web comprising the steps of:
- providing an aqueous dispersion of papermaking fibers;
- providing a foraminous forming member;
- providing a first dewatering felt layer capable of receiving and containing water pressed from a web;
- providing a composite imprinting member, the composite imprinting member comprising a foraminous web patterning layer joined to a second dewatering felt layer capable of receiving and containing water pressed from the web, wherein the web patterning layer has a web contacting face comprising a web imprinting surface and a deflection conduit portion, the deflection conduit portion being in flow communication with the second felt dewatering layer;
- providing a foraminous backing member;
- providing a compression nip between first and second opposed compression surfaces;
- forming an embryonic web of the papermaking fibers on the foraminous forming member, the embryonic web having a first face and a second face;
- transferring the embryonic web from the foraminous forming member to the composite imprinting member to position the second face of the embryonic web adjacent the web contacting face of the imprinting member;
- deflecting a portion of the papermaking fibers in the embryonic web into the deflection conduit portion and removing water from the embryonic web through the deflection conduit portion to form a non-monoplanar intermediate web of the papermaking fibers;
- positioning the web and the first dewatering felt layer intermediate the composite imprinting member and the foraminous backing member in the compression nip, wherein the first felt layer is positioned adjacent the first face of the intermediate web, wherein the web imprinting surface of the composite imprinting member is positioned adjacent the second face of the intermediate web, and wherein the first dewatering felt layer is positioned intermediate the web and the foraminous backing member;
- and
- pressing the intermediate web in the compression nip to further deflect the papermaking fibers into the deflection conduit portion of the composite imprinting member to form a molded web.
9 more elements
A method of forming a paper web comprising the steps of:
- providing an aqueous dispersion of papermaking fibers;
- providing a foraminous forming member;
- providing a composite imprinting member, the composite imprinting member comprising a foraminous web patterning layer joined to a dewatering felt layer capable of receiving and containing water pressed from the web, wherein the web patterning layer has a web contacting face comprising a web imprinting surface and a deflection conduit portion, the deflection conduit portion being in flow communication with the second felt dewatering layer;
- providing a foraminous backing member;
- the foraminous backing member comprising a patterned resin layer joined to a dewatering felt layer capable of receiving and containing water;
- providing a compression nip between first and second opposed compression surfaces;
- forming an embryonic web of the papermaking fibers on the foraminous forming member, the embryonic web having a first face and a second face;
- transferring the embryonic web from the foraminous forming member to the composite imprinting member to position the second face of the embryonic web adjacent the web contacting face of the imprinting member;
- deflecting a portion of the papermaking fibers in the embryonic web into the deflection conduit portion and removing water from the embryonic web through the deflection conduit portion to form a non-monoplanar intermediate web of the papermaking fibers;
- positioning the web intermediate the composite imprinting member and the foraminous backing member in the compression nip, wherein the web patterning layer of the composite imprinting member is positioned adjacent the first face of the intermediate web, and wherein the dewatering felt layer of the foraminous backing member is positioned adjacent the second face of the intermediate web;
- and
- pressing the intermediate web in the compression nip to further deflect the papermaking fibers into the deflection conduit portion to form a molded web.
9 more elements
Dependencies are inferred from the claim text.