Fluorinated hydrocarbon coating method

Claim 1

A METHOD OF APPLYING AND FIRMLY BONDING A FLUORINATED HYDROCARBON RESIN COATING TO THE EXPOSED SURFACE OF A CLEAN FLEXIBLE METALLIC SUBSTRATE SELECTED FROM THE GROUP CONSISTING OF A COIL SPRING IN WHICH THE HELICES THEREOF ARE IN MUTUAL CONTACT AND A FINE CONDUCTING WIRE OF SMALL AREA CROSS-SECTION AND COMPRISING THE STEPS OF: SUPPLYING A LIQUID DISPERSION BATH OF A FLUORINATED HYDROCARBON RESIN SELECTED FROM THE GROUP CONSISTING OF HEXAFLUOROPROPYLENE-TETRAFLUORETHYLENE COPOLYMER AND TETRAFLUOROETHYLENE; SLOWLY IMMERSING SAID SUBSTRATE IN SAID DISPERSION BATH UNDER NON-AGITATED CONDITIONS FOR ABOUT 2-30 MINUTES TO EFFECT A COATING OF SAID DISPERSION THEREON AND THEN SLOWLY REMOVING SAID SUBSTRATE FROM SAID DISPERSION BATH; THEN SUBJECTING SAID REMOVED DISPERSION COATED SUBSTRATE TO A PRELIMINARY HEATING IN A NON-TURBULENT ATMOSPHERE AT A TEMPERATURE NOT EXCEEDING ABOUT 180*F FOR ABOUT 10-120 MINUTES; THEN COOLING SAID PRELIMARILY HEATED DISPERSION COATED SUBSTRATE TO ABOUT THE AMBIENT TEMPERATURE OF THE ATMOSPHERE; THEN SUBJECTING SAID PRELIMINARILY HEATED AND COOLED DISPERSION COATED SUSTRATE TO A FURTHER HEATING TO A TEMPERATURE OF ABOUT 545* - 700* FOR ABOUT 10-180 MINUTES WHEREBY TO DRIVE OFF AN NON-RESIN PORTIONS OF SAID DISPERSION COATING AND TO CAUSE THE RESIN THEREOF TO FORM AS A HOT MELT IN CONTACT WITH SAID SUBSTRATE; AND THEN SLOWLY COOLING THE THUS FURTHER HEATED RESIN COATED SUBSTRATE TO A TEMPERATURE AT LEAST AS LOW AS ABOUT 150*F OVER A PERIOD OF ABOUT 30-180 MINUTES, WHEREBY TO CAUSE THE RESIN COATING THEREOF TO BECOME FIRMLY BONDED THERETO AS AN UNBROKEN FLEXIBLE TRANSPARENT FILM.

Claim 2

A METHOD OF APPLYING AND FIRMLY BONDING A FLUORINATED HYDROCARBON RESIN COATING TO THE EXPOSED SURFACE OF A CLEAN FLEXIBLE METALLIC SUBSTRATE SELECTED FROM THE GROUP CONSISTING OF A COIL SPRING IN WHICH THE HELICES THEREOF ARE IN MUTUAL CONTACT AND A FINE CONDUCTING WIRE OF SMALL AREA CROSS-SECTION AND COMPRISING THE STEPS OF: SUPPLYING A LIQUID DISPERSION BATH OF A FLUORINATED HYDROCARBON RESIN SELECTED FROM THE GROUP CONSISTING OF HEXAFLUOROPROPYLENE-TETRAFLUORETHYLENE COPOLYMER AND TETRAFLUOROETHYLENE; SLOWLY IMMERSING SAID SUBSTRATE IN SAID DISPERSION BATH UNDER NON-AGITATED CONDITIONS FOR ABOUT 2-30 MINUTES TO EFFECT A COATING OF SAID DISPERSION THEREON AND THEN SLOWLY REMOVING SAID SUBSTRATE FROM SAID DISPERSION BATH; THEN SUBJECTING SAID REMOVED DISPERSION COATED SUBSTRATE TO A PRELIMINARY HEATING IN A NON-TURBULENT ATMOSPHERE AT A TEMPERATURE NOT EXCEEDING ABOUT 180*F FOR ABOUT 10-120 MINUTES; THEN COOLING SAID PRELIMARILY HEATED DISPERSION COATED SUBSTRATE TO ABOUT THE AMBIENT TEMPERATURE OF THE ATMOSPHERE; THEN SUBJECTING SAID PRELIMINARILY HEATED AND COOLED DISPERSION COATED SUSTRATE TO A FURTHER HEATING TO A TEMPERATURE OF ABOUT 545* - 700* FOR ABOUT 10-180 MINUTES WHEREBY TO DRIVE OFF AN NON-RESIN PORTIONS OF SAID DISPERSION COATING AND TO CAUSE THE RESIN THEREOF TO FORM AS A HOT MELT IN CONTACT WITH SAID SUBSTRATE; AND THEN SLOWLY COOLING THE THUS FURTHER HEATED RESIN COATED SUBSTRATE TO A TEMPERATURE AT LEAST AS LOW AS ABOUT 150*F OVER A PERIOD OF ABOUT 30-180 MINUTES, WHEREBY TO CAUSE THE RESIN COATING THEREOF TO BECOME FIRMLY BONDED THERETO AS AN UNBROKEN FLEXIBLE TRANSPARENT FILM.