Sized mineral filled paper and method of making same

Claim 1

A METHOD OF MAKING SIZED AND MINERAL FILLED NEUTRAL T ALKALINE PAPER WHICH COMPRISES PREPARING AN AQUEOUS SUSPENSION OF CELLULOSE FIBERS, MECHACNICALLY REFINING SAID FIBERS, ADJUSTING THE PH OF SAID SUSPENSION TO AT LEAST AS HIGH AS 7.0, ADDING TO SAID SUSPENSION A FINELY DIVIDED NEUTRAL TO ALKALINE MINERAL FILLR SELECTED FROM THE GROUP COMPRISING CLAY, CALCUIM CARBONATE, MAGNESIUM CARBONATE, TITANIUM DIOXIDE AND TALC, SAID MINERAL FILLER HAVING AT LEAST PARTLY COATED THEREON A WATER REPELLENT DIMER OF AN ALIPHATIC KETONE CONTAINING AN ALIPHATIC HYDROCARBON GROUP HAVING FROM 6 TO 20 CARBON ATOMS, AND A POSITIVELY CHARGED WATER SWALLABLE ORGANIC COLLOIDAL RETENTION AGENT FOR SAID MINIRAL FILLER, SAID MIXTURE OF FIBERS AND MINERAL FILLER WITH SAID COATING MATERIALS THEREON ALSO HAVING A PH AT LEAST AS HIGH AS 7.0, AND THEREAFTER FORMING SAID FIBERS AND FILLER INTO A PAPER WEB, WHEREBY SAID COATED MINERAL FILLER IS ATTRACTED TO AND IS RETAINED BY SAID FIBERS UNDER NEUTRAL TO ALKALINE CONDITIONS IN THE WET END OF A PAPER MAKING PROCESS TO FORM A WEB HAVING A SURFACE PH OF AT LEAST 7.0, AND WHEREBY SAID DIMER SUBSTANTIALLY UNIFORMLY SIZES SAID FIBERS THROUGHOUT SAID WEB BY MIGRATING TO SAID FIBERS FROM SAID FILLER AND THEREAFTER REACTING WITH SAID FIBERS.

Claim 2

A METHOD OF MAKING SIZED AND MINERAL FILLED NEUTRAL T ALKALINE PAPER WHICH COMPRISES PREPARING AN AQUEOUS SUSPENSION OF CELLULOSE FIBERS, MECHACNICALLY REFINING SAID FIBERS, ADJUSTING THE PH OF SAID SUSPENSION TO AT LEAST AS HIGH AS 7.0, ADDING TO SAID SUSPENSION A FINELY DIVIDED NEUTRAL TO ALKALINE MINERAL FILLR SELECTED FROM THE GROUP COMPRISING CLAY, CALCUIM CARBONATE, MAGNESIUM CARBONATE, TITANIUM DIOXIDE AND TALC, SAID MINERAL FILLER HAVING AT LEAST PARTLY COATED THEREON A WATER REPELLENT DIMER OF AN ALIPHATIC KETONE CONTAINING AN ALIPHATIC HYDROCARBON GROUP HAVING FROM 6 TO 20 CARBON ATOMS, AND A POSITIVELY CHARGED WATER SWALLABLE ORGANIC COLLOIDAL RETENTION AGENT FOR SAID MINIRAL FILLER, SAID MIXTURE OF FIBERS AND MINERAL FILLER WITH SAID COATING MATERIALS THEREON ALSO HAVING A PH AT LEAST AS HIGH AS 7.0, AND THEREAFTER FORMING SAID FIBERS AND FILLER INTO A PAPER WEB, WHEREBY SAID COATED MINERAL FILLER IS ATTRACTED TO AND IS RETAINED BY SAID FIBERS UNDER NEUTRAL TO ALKALINE CONDITIONS IN THE WET END OF A PAPER MAKING PROCESS TO FORM A WEB HAVING A SURFACE PH OF AT LEAST 7.0, AND WHEREBY SAID DIMER SUBSTANTIALLY UNIFORMLY SIZES SAID FIBERS THROUGHOUT SAID WEB BY MIGRATING TO SAID FIBERS FROM SAID FILLER AND THEREAFTER REACTING WITH SAID FIBERS.