Electric heating – Microwave heating – Tunnel furnace
Patent
1976-05-25
1978-05-30
Braun, Fred L.
Electric heating
Microwave heating
Tunnel furnace
55102, 219216, 250319, G03D 700
Patent
active
040926583
ABSTRACT:
In a photoprinting machine including a developing chamber in which a web of exposed diazotype paper continuously fed at an adjustable speed is developed with a developer medium composed of a vaporous ammonia/water mixture, an after-treating chamber following next in the direction of feed of the diazotype paper and which is connected with a device for removing ammonia-containing exhaust air, and a device for expelling developer medium from the developed diazotype paper. The expelling device includes a high energy infrared radiator positioned opposite the web in the after-treating chamber, a connection between the high-energy infrared radiator and an output of a heat output control device, and an input for the heat control device connected to a transmitter of the feed speed. The heat output control device having a characteristic such that the heat output of the high-energy infrared radiator is proportional to the feed speed and the color temperature of the high-energy infrared radiator is about 2000.degree. K at the maximum feed speed of the diazotype paper.
REFERENCES:
patent: 1817198 (1931-08-01), Langsner
patent: 2058983 (1936-10-01), Horn
patent: 3230857 (1966-01-01), Ritzerfeld et al.
patent: 3745307 (1973-07-01), Peek et al.
Braun Fred L.
Bryan James E.
Hoechst Aktiengesellschaft
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