Heating device used for production of shutter for a disk cassett

Details Heating device used for production of shutter for a disk cassett Heating device used for production of shutter for a disk cassett

1993-03-15

1994-09-13

Reynolds, Bruce A.

Electric heating

Heating devices

Combined with pressure application means

264DIG46, 264346, 425DIG13, B29C 1704

Patent

active

053471024

ABSTRACT:
A heating device used for production of a disc shutter made of synthetic resin and shaped into a U-form in section, arranged to heat a pair of corner portions of the shutter to extinguish residual stresses that exist in the corner portions that are formed where a connecting portion of the shutter connects a pair of shutter plates. The heating device comprises a movable support for fixedly supporting the free ends of the pair of shutter plates, a fixed heater which heats the corner portions of the shutter at a predetermined temperature, a pair of heating surfaces connected to form an acute angle, a temperature setting device, and a heating duration setting device.

REFERENCES:
patent: 4698714 (1987-10-01), Sugawara et al.
patent: 5036421 (1991-07-01), Kaneda et al.
patent: 5136449 (1992-08-01), Veenstra

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