Process for forming absorbent paper by imprinting a fabric knuckle pattern thereon prior to drying and paper thereof

• US 3,301,746 A
• Filed: 04/13/1964
• Issued: 01/31/1967
• Est. Priority Date: 04/13/1964
• Status: Expired due to Term

• Current Assignee: James B. Sisson, Lawrence H. Sanford
• Original Assignee: James B. Sisson, Lawrence H. Sanford
• Inventors: Sanford, Lawrence H., Sisson, James B.
• Application Number:
  US04/359,295
• Time in Patent Office: 1,023 Days
• US Class Current: 162/113
• CPC Class Codes: D21F 11/006 Making patterned paper
• CPC Class Codes: D21H 25/005 Mechanical treatment D21H25/08, D21H25/18 take precedence
• CPC Class Codes: D21H 5/24 having enhanced flexibility or extensibility produced by mechanical treatment of the unfinished paper crêping paper B31F1/12; making patterned paper D21F11/006, apertured paper D21F11/008

Claims

1. A PROCESS FOR THE MANUFACTURE OF A SOFT, BULKY AND ABSORBENT PAPER SHEET WHICH COMPRISES THE STEPS OF (1) FORMING AN UNCOMPACTED PAPER WEB HAVING A UNIFORM BASIS WEIGHT OF ABOUT 5 TO ABOUT 40 POUNDS PER 3000 SQUARE FEET, (2) SUPPORTING SAID UNCOMPACTED PAPER WEB ON AN IMPRINTING FABRIC HAVING ABOUT 20 TO ABOUT 60 MESHES PER INCH, SAID IMPRINTING FABRIC BEING FORMED FROM FILAMENTS HAVING A DIAMETER OF ABOUT 0.008 TO ABOUT 0.02 INCH, (3) THERMALLY PRE-DRYING SAID UNCOMPACTED PAPER WEB TO A FIBER CONSISTENCY OF ABOUT 30% TO ABOUT 80%, (4) IMPRINTING THE KNUCKLE PATTERN OF SAID IMPRINTING FABRIC IN THE PRE-DRYED UNCOMPACTED PAPER WEB AT A KNUCKLE PRESSURE OF ABOUT 1000 P.S.I. TO ABOUT 12,000 P.S.I. AND (5) FINAL DRYING THE PAPER SHEET SO FORMED.

5. A SOFT, BULKY AND ABSORBENT PAPER SHEET CHARACTERIZED BY HAVING A UNIFORM BASIS WEIGHT OF ABOUT 5 TO ABOUT 40 POUNDS PER 3000 SQUARE FEET, BY HAVING IMPRESSED IN ITS SURFACE, TO A DEPTH OF AT LEAST 30% OF ITS MACHINE GLAZED CALIPER THE KNUCKLE PATTERN OF AN IMPRINTING FABRIC HAVING ABOUT 20 TO ABOUT 60 MESHES PER INCH, BY HAVING ABOUT 1% TO ABOUT 14% OF ITS SURFACE COMPRESSED IN SAID KNUCKLE PATTERN TO A RELATIVE DENSITY OF AT LEAST 0.7 AND SAID SOFT, BULKY AND ABSORBENT PAPER SHEET BEING FURTHER CHARACTERIZED BY HAVING A BULK DENSITY AT 100 GRAMS PER SQUARE INCH LOADING OF ABOUT 1.0 TO ABOUT 3.6, PROPORTIONAL TO ITS BASIS WEIGHT.