Method for making tissue sheets on a modified conventional crescent-former tissue machine
June 30, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3224928 3841910 Porous felt web conditioning system Method of dewatering and drying in a Yankee machine Method and apparatus for continuously expelling an atomized stream of water from a moving fibrous web Positive pressure felt dewatering and cleaning device and method Steam shower Air impingement web drying method and apparatus Roll press for removing water from a web of paper using solid grooved roll and compressed air Guide roll for a porous belt InventorsAssigneeApplicationNo. 607712 filed on 06/30/2000US Classes:162/205, Pressure162/207, Heating, cooling, gas or vapor contact162/290, Molding and heat exchange means162/297Pneumatic pressure or vacuum means acting directly on stock on mold surfaceExaminersPrimary: Nguyen, Dinh Q.Attorney, Agent or FirmForeign Patent References
International ClassD21F 011/00AbstractA tissue sheet is made using a modified wet pressing process employing an integrally sealed air press. After initial formation and conventional vacuum dewatering, the wet web may be conformed to the surface contour of a relatively coarse fabric to give the web a textured surface. By creating a pressure differential across the web, the air press noncompressively dewaters the wet web to a consistency of about 30 to about 40 percent prior to a heated drying cylinder. The web may be dried to substantially preserve its three-dimensional, throughdried-like texture. The process provides a web having an exceptionally high degree of bulk and absorbency not expected in wet-pressed products.Field of SearchBy fluid pressurePressure Heating, cooling, gas or vapor contact Molding and heat exchange means Pneumatic pressure or vacuum means acting directly on stock on mold surface Common vat or stock feed Mask, deckle, or apron With separate heated drying means Gas or vapor drawn through treated material Having sealing means | |
