Developer mixes

Claim 1

A DEVELOPER MIX FOR DEVELOPING ELECTGROSTATIC LATENT IMAGES ON PHOTOCONDUCTIVE INSULATING MATERIAL EMPLOYING A MAGNETIC BRUSH FOR APPLYING THE DEVELOPER TO THE LATENT IMAGES, WHICH DEVELOPER MIX CONSISTS ESSENTIALLY OF MAGNETIC CARRIER JPARTICLES AND TONER PARTICLES HAVING A PARTICLE SIZE SMALLER THAN THE JPARTICLE SIZE OF THE MAGNETIC CARRIER PARTICLES, THE TONER PARTICLES CONSISTING ESSENTIALLY OF A PIGMENTED THERMOPLASTIC RESIN HAVING A RESISTIVITY LESS THAN 10**19 OHM-CM. AND A PARTICLE SIZE OF FROM 1 TO 75 MICRONS, SAID TONER PARTICLES BEING MIXED WITH THE MAGNETIC CARRIER PARTICLES HAVING A PARTICLE SIZE OF FROM 25 TO 150 MICRONS IN THE PROPORTIONS OF FROM 10 TO 100 PARTS OF MAGNETIC CARRIER PARTICLES PER PART OF TONER PARTICLES BY WEIGHT, AND SAID DEVELOPER MIX CONTAINING FROM 0.02 TO 0.4 PART BY WEIGHT OF A THIRD COMPONENT PER 100 PARTS BY WEIGHT OF CARRIER PARTICLES, SAID THIRD COMPONENT INTIMATELY MIXED WITH AND FORMING A COATING ON THE EXTERIOR OF SAID MAGNETIC CARRIER PLARTICLES AND SAID TONER PARTICLES, SAID THIRD COMPONENT BEING SELECTED FROM THE GROUP CONSISTING OF (A) FATTY ACIDS CONTAINING FROM 10 TO 26 CARBON ATOMS; (B) A SALT OF SUCH FATTY ACIDS, THE CATION OF THE SALT BEING SELECTED FROM THE GROUP CONSISTING OF CALCIUM, BARIUM, SODIUM, LITHIUM, MAGNESIUM, MANGANESE, ZINC, NICKEL, IRON, COBALT, LEAD AND AMMONIUM; (C) A MIXTURE OF SAID FATTY ACIDS; (D) A MIXTURE CONTAINING AT LEAST ONE OF SAID FATTY ACIDS AND AT LEAST ONE OF SAID SALTS; AND (E) A MIXTURE OF SAID SALTS.