Abstract A duplicator stencil of the type adapted to be perforated through heat action in selected areas comprises a film of a thermoplastic resin carrying on the surface thereof which is to be exposed to heat action, a coating containing a softener for the resin which is a solid and which melts or is decomposed at a lower temperature than the perforation temperature of the film material so as to promote the rapidity and to lower the temperature of perforation of the film material, a substance influencing the surface property of the film material to make it more supple so as to allow complete contact with the original to be stenciled, and to insure easy separation of the original and stencil after heat perforation of the latter, and an inorganic finely divided powder which eliminates residual tackiness of the film material and to impart sharp contours to the perforations, all in amounts effective to facilitate penetration and rapid perforation of the film at places where it is exposed to a source of heat.
Inventors
👤 John V Andersen
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-03 05:45
CPC Classifications
B; B41; B41N; B41N1/00; B41N1/24; B41N1/245
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
145 words
A DUPLIICATOR STENCIL ADAPTED TO BE PERFORATED THROUGH HEAT ACTION IN SELECTED AREAS, COMPRISING A FILM OF A THERMOPLASTIC RESIN CARRYING ON THE SURFACE THEREOF, WHICH IS TO BE EXPOSED TO HEAT ACTION, COATING CONSISTING ESSENTIALLY OF THE FOLLOWING INGREDIENT: A. A SOFTENER FOR SAID SYNTHETIC RESIN SELECTED FROM THE GROUP CONSISTING OF DIOCTYL PHTHALATE, TRICRESYL PHOSPHATE, TRIXYLYL PHOSPHATE, POLYPHENYL CHLORIDES AND DI-CYCLOHEXYL PHATHALATE IN AN AMOUNT WHICH PROMOTES THE RAPIDITY AND LOWERS THE TEMPERATURE OF PERFORATION OF SAID FILM MATERIAL WHEN THE FILM IS EXPOSED TO HEAT ACTION; B. A SUBSTANCE INFLUENCING THE SURFACE PROPERTY OF SAID FILM MATERIAL AND SELECTED FROM THE GROUP CONSISTING OF ISOBUTYLENE-NAPHTHALENE-SULFURIC ACID SODIUM, DERIVATIVES OF FATTY-ACID-DIBUTYL-AMIDE, POLY-DIMETHYL-SILOXANE, METHYL SILICONE-POLYMERS, POLYMER TETRA-ALKYLSILANES, POLYETHYLENE GLYCOLS AND ETHANOLIZED ALKYL-GUANIDINE-AMINECOMPLEXES IN AN AMOUNT TO MAKE IT MORE SUPPLE UNDER THE INFLUENCE OF HEAT ACTION SO AS TO ALLOW A COMPLETE CONTACT WITH
Claim 2
Dependent Claim
145 words
A DUPLIICATOR STENCIL ADAPTED TO BE PERFORATED THROUGH HEAT ACTION IN SELECTED AREAS, COMPRISING A FILM OF A THERMOPLASTIC RESIN CARRYING ON THE SURFACE THEREOF, WHICH IS TO BE EXPOSED TO HEAT ACTION, COATING CONSISTING ESSENTIALLY OF THE FOLLOWING INGREDIENT: A. A SOFTENER FOR SAID SYNTHETIC RESIN SELECTED FROM THE GROUP CONSISTING OF DIOCTYL PHTHALATE, TRICRESYL PHOSPHATE, TRIXYLYL PHOSPHATE, POLYPHENYL CHLORIDES AND DI-CYCLOHEXYL PHATHALATE IN AN AMOUNT WHICH PROMOTES THE RAPIDITY AND LOWERS THE TEMPERATURE OF PERFORATION OF SAID FILM MATERIAL WHEN THE FILM IS EXPOSED TO HEAT ACTION; B. A SUBSTANCE INFLUENCING THE SURFACE PROPERTY OF SAID FILM MATERIAL AND SELECTED FROM THE GROUP CONSISTING OF ISOBUTYLENE-NAPHTHALENE-SULFURIC ACID SODIUM, DERIVATIVES OF FATTY-ACID-DIBUTYL-AMIDE, POLY-DIMETHYL-SILOXANE, METHYL SILICONE-POLYMERS, POLYMER TETRA-ALKYLSILANES, POLYETHYLENE GLYCOLS AND ETHANOLIZED ALKYL-GUANIDINE-AMINECOMPLEXES IN AN AMOUNT TO MAKE IT MORE SUPPLE UNDER THE INFLUENCE OF HEAT ACTION SO AS TO ALLOW A COMPLETE CONTACT WITH
Claim 3
Dependent Claim
34 words
A duplicator stencil according to claim 1 wherein said softener is a primary plasticizer in solid state and melts or is decomposed at a lower temperature than the perforation temperature of the film material.
Claim 4
Dependent Claim
21 words
A duplicator stencil according to claim 1, wherein said coating contains 10-50 per cent of said finely dispersed inorganic absorbing substance.
Claim 5
Dependent Claim
26 words
A duplicator stencil according to claim 1, wherein the particle size of said finely dispersed inorganic powder is between about 0.5 and about 10 Mu .