Sizing fibrous cellulosic materials

Claim 1

THE PROCESS FOR SIZING A CELLULOSIC PRODUCT OF A FIBROUS NATURE WHICH COMPRISES THE STEPS OF DEPOSITING ON THE FIBERS OF THE CELLULOSE ACTIVE SIZING CONSTITUENTS OF A SUBSTANTIVE BITUMEN-IN-WATER EMULSION BY INTIMATELY CONTACTING THE CELLULOSIC FIBERS WITH THE EMULSION, THE ACTIVE SIZING CONSTITUENTS OF THE EMULSION BEING DEPOSITED ON THE CELLULOSIC FIBERS IN THE ABSENCE OF A PRECIPITATING AGENT, THE DISPERSED PHASE OF THE EMULSION CONSISTING ESSENTIALLY OF BITUMEN, THE EMULSION BEING CHARACTERIZED BY HAVINA AS AN EMULSIFYING AGENT AN ORGANIC EMULSIFER WHICH PROMOTES THE FORMATION OF OIL-IN-WATER EMULSIONS, NOT LESS THAN 95% OF THE PARTICLES HAVING A SIZE OF 0.11.0 MICRON, NOT LESS THAN 99% OF THE PARTICLES HAVING A SIZE UNDER 4 MICRONS, SUBSTANTIALLY NO PARTICLES HAVING A SIZE LARGER THAN 6 MICRONS, AND AVERAGE PARTICLES HAVING A LESS THAN 1.0 MICRON, AN ABILITY TO SIZE THE CELLULOSIC FIBERS ON THE ACID SIDE AND THE ALKALINE SIDE, AND THE EMULSION BEING PRODUCED BY EMULSIFYING THE BITUMEN AND WATER IN THE PRESENCE OF THE EMULSIFYING AGENT BY DISPERSING THE BITUMENT IN THE WATER IN A RATIO TO PRODUCE AN EMULSION HAVING SUBSTANTIALLY THE MAXIUM VISCOSITY FOR THE BITUMEN-IN-WATER SYSTEM AT THE TEMPERATURE OF EMULSIFICATION, AND SUBSTEQUENTLY FORMING THE RESULTANT SIZED FIBERS INTO MANUFACTURED FORM.