Method of coating a spliced web

Claim 3

The method of coating a strip of spliced strip material as defined in claim 1, wherein the increase in the initial differential takes place a predetermined interval before a splice in the strip material reaches said bead, and the decrease in the differential pressure to the initial differential air pressure takes place a predetermined interval after the splice has passed through said bead of liquid composition.

Claim 4

The method of coating a strip of spliced strip material as defined in claim 1, wherein the initial differential air pressure is in the order of 0.1 inch to 5.00 inch of water.

Claim 5

The method of coating a strip of spliced strip material as defined in claim 1, wherein the increased differential air pressure is 2 to 12 times that of the initial differential air pressure.

Claim 8

The method of coating a strip of spliced strip material as defined in claim 5, wherein the initial subatmospheric pressure is 0.5 inch to 0.7 inch of water less than atmospheric pressure and the reduced subatmospheric pressure is 0.9 inch to 1.0 inch of water less than atmospheric pressure.

Claim 9

The method of coating a strip of spliced mAterial as defined in claim 5, wherein the strip of material is butt spliced by a strip of splicing tape extending transversely of and overlying the butted ends of the strip and the splicing tape is on the surface of the web to be coated, the initial subatmospheric pressure is 0.2 inch to 0.7 inch of water less than atmospheric pressure and the reduced subatmospheric pressure is 0.7 inch to 1.0 inch of water less than atmospheric pressure.

Claim 10

A method of coating a strip of spliced material as defined in claim 5, wherein the splicing tape is on the uncoated side of the strip of material and the initial subatmospheric pressure is 0.6 inch of water less than atmospheric pressure and the reduced subatmospheric pressure is 0.9 inch of water less than atmospheric pressure.

Claim 11

IN A METHOD OF COATNG A MOVING WEB OF SUBSTANTIALLY NONPOROUS FLIXIBLE MATERIAL CONTAINING AT LEAST ONE SPLICE WHOSE THICKNESS IS SUBSTANTIALLY GREATER THAN THE THICKNESS OF THE WEB OF MATERIAL WITH A LIQUID COATNG COMPOLSITION HAVING VISCOSITIES OF BETWEEN 3 AND 35 CENTIPOISES, COMPRISING FLOWING A THIN LAYER OF SAID COMPOSITION FROM A COATING DEVICE TO THE WEB OF NONPOROUS MATERIAL TO FORM A BEAD OF COMPOSITION THEREBETWEEN EXTENDING TRANSVERSELY OF THE WEB, SAID BEAD HAVING A DEPTH SEVERAL TIMES THE THICKNESS OF SAID WEB WHILE PSSING FROM THE COATING DEVICE TO THE WEB AND WHILE THE WEB MOVES TOWARD THE COATING DEVICE AND AWAY FROM THE CATING DEVICE, MAINTAINING THE BEAD OF COATING COMPOSITION IN A COATING CONDITION BY APPLYING AN INITIAL PREDETERMINED DIFFERENTIAL IN GASEOUS PRESSURES ON THE TWO SIDES OF THE BEAD OF COATING COMPOSITION, THE PRESSURE ON THAT SIDE OF THE BEAD FROM WHICH THE WEB APPROACHES THE COATING DEVICE BEING LESS THAN THE PRESSURE ON THAT SIDE OF THE BEAD FROM WHICH THE WEB MOVES AWAY FROM THE COATING DEVICE, THE IMPROVEMENT WHICH COMPRISES, INCREASING THE INITIAL PRESSURE DIFFERENTIAL A PREDETERMINED INCREMENT A PREDETERMINED TIME INTERVAL BEFORE A SPLICE IN THE WEB REACHES THE BEAD OF COATING COMPOSITION, MAINTAINING THE INCREASED PRESSURE DIFFERENTIAL UNTIL THE SPLICE IN THE WEB HAD PASSED HROUGH SAI BEAD OF COATING COMPOSITION, AND DECREASING THE PRESSURE DIFFERENTIAL TO THE INITIAL PRESSURE DIFFERENTIAL AFTER THE SPLICE IN THE WEB HAS PASSED THROUGH SAID BEAD OF COATING COMPOSITION.

Claim 12

IN A METHOD OF COATNG A MOVING WEB OF SUBSTANTIALLY NONPOROUS FLIXIBLE MATERIAL CONTAINING AT LEAST ONE SPLICE WHOSE THICKNESS IS SUBSTANTIALLY GREATER THAN THE THICKNESS OF THE WEB OF MATERIAL WITH A LIQUID COATNG COMPOLSITION HAVING VISCOSITIES OF BETWEEN 3 AND 35 CENTIPOISES, COMPRISING FLOWING A THIN LAYER OF SAID COMPOSITION FROM A COATING DEVICE TO THE WEB OF NONPOROUS MATERIAL TO FORM A BEAD OF COMPOSITION THEREBETWEEN EXTENDING TRANSVERSELY OF THE WEB, SAID BEAD HAVING A DEPTH SEVERAL TIMES THE THICKNESS OF SAID WEB WHILE PSSING FROM THE COATING DEVICE TO THE WEB AND WHILE THE WEB MOVES TOWARD THE COATING DEVICE AND AWAY FROM THE CATING DEVICE, MAINTAINING THE BEAD OF COATING COMPOSITION IN A COATING CONDITION BY APPLYING AN INITIAL PREDETERMINED DIFFERENTIAL IN GASEOUS PRESSURES ON THE TWO SIDES OF THE BEAD OF COATING COMPOSITION, THE PRESSURE ON THAT SIDE OF THE BEAD FROM WHICH THE WEB APPROACHES THE COATING DEVICE BEING LESS THAN THE PRESSURE ON THAT SIDE OF THE BEAD FROM WHICH THE WEB MOVES AWAY FROM THE COATING DEVICE, THE IMPROVEMENT WHICH COMPRISES, INCREASING THE INITIAL PRESSURE DIFFERENTIAL A PREDETERMINED INCREMENT A PREDETERMINED TIME INTERVAL BEFORE A SPLICE IN THE WEB REACHES THE BEAD OF COATING COMPOSITION, MAINTAINING THE INCREASED PRESSURE DIFFERENTIAL UNTIL THE SPLICE IN THE WEB HAD PASSED HROUGH SAI BEAD OF COATING COMPOSITION, AND DECREASING THE PRESSURE DIFFERENTIAL TO THE INITIAL PRESSURE DIFFERENTIAL AFTER THE SPLICE IN THE WEB HAS PASSED THROUGH SAID BEAD OF COATING COMPOSITION.

Claim 13

A method of coating a strip of spliced material as defined in claim 9, wherein the increased pressure differential is applied when the splice is approximately 2 feet ahead of the coating bead and is decreased to the initial differential pressure after the splice is approximately 2 feet beyond the coating bead.