Abstract:
APPARATUS FOR DEVELOPING SHEET MATERIAL CARRYING A RECORDING LAYER WHICH IS IRREVERSIBLY IMAGEWISE DIFFERENTIATED IN TERMS OF SOLVENT SOLUBILITY IN WHICH THE SHEET MATERIAL IS APPLIED TO A WETTED ENDLESS BELT AND IS DELIVERED THEREBY INTO FRICTIONAL RUBBING CONTACT WITH A ROTATABLE RUBBING DRUM HAVING A RESILIENT POROUS PERIPHERAL SURFACE. THE RUBBING DRUM IS WETTED WITH THE SOLVENT WHILE MAKING CONTACT WITH THE SHEET MATERIAL, AND THE PERIPHERAL SPEED OF THE DRUM IS PREFERABLY SUBSTANTIALLY HIGHER, SAY AT LEAST TEN TIMES HIGHER, THAN THE TRANSPORT SPEED OF THE SHEET MATERIAL ON THE BELT. SURPLUS SOLVENT CAN BE CAUGHT BETWEEN A TRAY ARRANGED BENEATH THE RUBBING DRUM AND THROUGH WHICH THE LOWER STRETCH OF THE ENDLESS BELT PASSES. ALL OF THE OPERATIVE COMPONENTS CAN BE ARRANGED WITHIN A HOUSING AN INLET AND OUTLET OPENINGS THEREIN FOR THE INGRESS AND EGRESS OF THE SHEET MATERIAL.
Abstract:
A heat-sensitive recording material of the type covered by U.S. Pat. No. 3,476,937 and including a recording layer formed of a dispersion of solid hydrophobic thermoplastic polymer particles in a water-soluble hydrophilic binder is modified to include a diffusion-resistant colorant material and a visible finely divided material absorbing radiation and converting the same into heat, such material being either chemically bleachable or soluble in an aqueous liquid. The resultant heat-sensitive material is exposed to radiation pattern and then contacted with at least one liquid to bleach or dissolve the radiation absorbing and converting material and to remove by washing the water-soluble portions of the recording layer, the portions corresponding to the radiation pattern having been rendered water-insoluble by the exposure step but remain water-permeable to permit the radiation absorbing and converting material to be bleached or dissolved by penetration of the liquid.
Abstract:
A dispersion of solid hydrophobic thermoplastic polymer particles in a continuous phase of a hydrophilic binder on a support is imagewise exposed to heat. An aqueous solution of a colorant is diffused through the hydrophilic areas of the dispersion layer which were not exposed to heat and the support is imagewise colored.
Abstract:
A PROCESS FOR RESPONDING INFORMATION WHEREIN A HEATSENSITIVE RECORDING LAYER ADAPTED TO CHANGE THE WATERPERMEABILITY THEREOF WHEN HEATED AND CONTAINING UNIFORMLY DISTRIBUTED THERETHROUGH FINELY-DIVIDED MATERIAL ABSORBING VISIBLE RADIATION AND CONVERTING THE SAME TO HEAT IS EXPOSED TO RADIATION THROUGH A CONTINUOUS TONE TRANSPARENCY TO BE REPRODUCED AND A SCREEN, THE TIME OF THE EXPOSURE BEING NOT MORE THAN ONE-TENTH OF A SECOND, AND THE INTENSITY OF THE RADIATION BEING SUFFICIENT TO PRODUCE IN THE EXPOSED PORTIONS OF THE RECORDING LAYER SUFFICIENT HEAT TO BRING ABOUT THE CHANGE IN ITS WATER-PERMEABILITY,
AND THE EXPOSED RECORDING LAYER IS TREATED WITH AN AQUEOUS LIQUID TO DEVELOP THE INFORMATION THEREIN.