Abstract A heating system for relaxing xeroradiographic plates is disclosed which includes a thermofoil type heating system. This system is brought into thermal contact with a xeroradiographic plate to be relaxed. The thermofoil heating system includes a current resistive layer which when electrically energized converts electrical energy into thermal energy and two sandwiching layers which contain the current resistive layer. The sandwiching layers comprise a high dielectric strength high temperature resistance sheet material. In one embodiment, the thermofoil type heating system is configured so as to be brought into contact with the xeroradiographic plate to be relaxed. In another embodiment, the thermofoil type heating system is configured so as to reside on the xeroradiographic plate.
An improved xeroradiographic plate having a heating member attached thereto for relaxing xeroradiographic plates, each xeroradiographic plate comprising a substrate and a photoreceptor layer overlying said substrate comprising: a thermofoil type heating member which is attached to said substrate and in thermal contact therewith, said thermofoil member comprising a current resistive layer which upon electrical energization converts electrical energy into thermal energy and first and second layers disposed on opposite sides of said current resistive layer, said first and second layers comprising a high dielectric strength, high temperature resistant sheet material.
Claim 2
Dependent Claim
91 words
An improved xeroradiographic plate having a heating member attached thereto for relaxing xeroradiographic plates, each xeroradiographic plate comprising a substrate and a photoreceptor layer overlying said substrate comprising: a thermofoil type heating member which is attached to said substrate and in thermal contact therewith, said thermofoil member comprising a current resistive layer which upon electrical energization converts electrical energy into thermal energy and first and second layers disposed on opposite sides of said current resistive layer, said first and second layers comprising a high dielectric strength, high temperature resistant sheet material.
Claim 3
Dependent Claim
16 words
The system as defined in claim 1 wherein said current resistive layer comprises a resistive metal.
Claim 4
Dependent Claim
15 words
The system as defined in claim 2 wherein said resistive metal comprises nickel chronium alloys.
Claim 5
Dependent Claim
24 words
The improved plate as defined in claim 1 wherein said first and second layers are selected from the group consisting of polyimides and polyesters.