Method of fixing electrostatic powder image

Claim 1

IN A PROCESS WHEREIN AN ELECTROSTATIC IMAGE CORRESPONDING TO A PATTERN OF LIGHT AND SHADOW TO BE REPRODUCED IS MADE VISIBLE BY DEPOSITING POWDER ON A SURFACE IN CONFORMITY WITH SAID ELECTROSTATIC IMAGE AND AFFIXING SAID POWDER IN IMAGE CONFORMATION TO A SUPPORT MATERIAL, THE IMPROVEMENT COMPRISING AFFIXING SAID POWDER IN IMAGE CONFORMATION BY INTRODUCING SAID SUPPORT MATERIAL INTO THE VAPOR OF AT AN ORGANIC LIQUID SOLVENT FOR AN ADHESIVE CONSTITUENT OF AT LEAST ONE OF THE MATERIALS FROM WHICH SAID POWDER IMAGE AND SAID SUPPORT MATERIAL FROM WHICH SAID POWDER IMAGE AND SAID SUPPORT MATERIAL ARE FORMED, SAID VAPOR AND SAID SUPPORT MATERIAL BEING AT AMBIENT TEMPERATURE AND SAID VAPOR BEING AT A PARTIAL PRESSURE EXCEEDING THE VAPOR PRESSURE OF SOLVENT FROM A TACKY SOLUTION OF SAID ADHESIVE CONSTITUENT, AND THEN REMOVING SAID SUPPORT MATERIAL FROM SAID VAPOR AFTER SAID ADHESIVE HAS BECOME TACKY, AND REMOVING SAID SOLVENT FROM SAID ADHESIVE TO PERMANENTLY BOND SAID IMAGE TO SAID SUPPORT MATERIAL.