Claims
- 1. In a laminating press for heating and laminating with thermosetting resins the improvement which comprises electrical sensing means for measuring the electrical properties of the gel stage of the thermosetting resin of a heated thermosetting laminating assembly as said resin is heated and means for applying pressure to said press when said electrical sensing means measures the gel stage to thereby thermoset the laminated assembly in said press.
- 2. The press according to claim 1 in which the electrical sensing means is a recording ohmmeter.
- 3. The press according to claim 1 in which the electrical sensing means is connected to an electronic controller.
- 4. The press according to claim 3 in which the electronic controller is a differential amplifier with storage and comparison circuits.
- 5. The press according to claim 1 in which hydraulic pressure is employed to operate said press.
CROSS-REFERENCES TO RELATED APPLICATIONS
This application is a division of U.S. application Ser. No. 819,093, filed Apr. 24, 1969, now U.S. Pat. No. 3,600,247, which in turn is a continuation-in-part of U.S. application Ser. No. 680,983, filed Nov. 6, 1967, now abandoned.
US Referenced Citations (6)
Divisions (1)
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Number |
Date |
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Parent |
819093 |
Apr 1969 |
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Continuation in Parts (1)
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680983 |
Nov 1967 |
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