Abstract 1. The method of heat processing at a temperature within a predetermined range a critical material to change its physical state between fluid and solid form without a sudden undesirable transition of state caused by temperatures outside said range, comprising the steps of providing a layer of said material, bringing into thermal contact with said layer a heating film occupied by an electrically conductive surface pattern uniformly distributed to provide a substantially constant temperature throughout the heating film, and passing an electric current through said surface pattern of such intensity to provide a temperature within said range in said layer of said material wherein the material is a liquid material requiring solidification produced by chemical reaction, including the step wherein the layer of material is provided on a durable carrier structure wherein the material is a layer of fluid paint containing a fluid medium and a solid film forming substance covering at least parts of said durable structure, and including the steps of covering the major part of the area of said heating film with said conductive surface pattern, and providing said current at a first intensity to raise the temperature at any point on the surface pattern in a range without the maximum at any point on the surface pattern reaching the boiling temperature of the fluid paint and subsequently at sufficient intensity to raise its temperature in a range without maximum at any point on the surface pattern reaching the temperature of sudden hardening of the paint.
The method of heat processing at a temperature within a predetermined range a critical material to change its physical state between fluid and solid form without a sudden undesirable transition of state caused by temperatures outside said range, comprising the steps of providing a layer of said material, bringing into thermal contact with said layer a heating film occupied by an electrically conductive surface pattern uniformly distributed to provide a substantially constant temperature throughout the heating film, and passing an electric current through said surface pattern of such intensity to provide a temperature within said range in said layer of said material wherein the material is a liquid material requiring solidification produced by chemical reaction, including the step wherein the layer of material is provided on a durable carrier structure wherein the material is a layer of fluid paint containing a fluid medium and a solid film forming substance covering at least parts of said durable structure, and including the steps of covering the major part of the area of said heating film with said conductive surface pattern, and providing said current at a first intensity to raise the temperature at any point on the surface pattern in a range without the maximum at any point on the surface pattern reaching the boiling temperature of the fluid paint and subsequently at sufficient intensity to raise its temperature in a range without maximum at any point on the surface pattern reaching the temperature of sudden hardening of the paint.
Claim 2
Independent Claim
248 words
The method of heat processing at a temperature within a predetermined range a critical material to change its physical state between fluid and solid form without a sudden undesirable transition of state caused by temperatures outside said range, comprising the steps of providing a layer of said material, bringing into thermal contact with said layer a heating film occupied by an electrically conductive surface pattern uniformly distributed to provide a substantially constant temperature throughout the heating film, and passing an electric current through said surface pattern of such intensity to provide a temperature within said range in said layer of said material wherein the material is a liquid material requiring solidification produced by chemical reaction, including the step wherein the layer of material is provided on a durable carrier structure wherein the material is a layer of fluid paint containing a fluid medium and a solid film forming substance covering at least parts of said durable structure, and including the steps of covering the major part of the area of said heating film with said conductive surface pattern, and providing said current at a first intensity to raise the temperature at any point on the surface pattern in a range without the maximum at any point on the surface pattern reaching the boiling temperature of the fluid paint and subsequently at sufficient intensity to raise its temperature in a range without maximum at any point on the surface pattern reaching the temperature of sudden hardening of the paint.