B - Operations – Transporting – 05 – C
Patent
B - Operations, Transporting
05
C
117/70, 32/74, 3
B05C 7/04 (2006.01) C23D 5/02 (2006.01)
Patent
CA 1148418
PROCESS AND APPARATUS FOR ENAMELLING THE INSIDE SURFACE OF HOLLOW VESSELS Abstract of the Disclosure A process of enameling the inside surface of hollow vessels, which have two openings at opposite points. In a hot-water reservoir to be enameled these openings are provided at both ends. One opening is connected to a vacuum pump and the other to a conduit which incorporates a valve and leads to an enamel slip reservoir. In a first step, a vacuum pump is operated to pre-evacuate the interior of the hollow vessel so that air is removed from the pores at the inside surface of the hollow vessel. In this step the valve in the slip conduit remains closed. When the vessel has been pre- evacuated to about 40 to 80 torrs absolute, the valve is opened so that slip flows suddenly into the hollow vessel and fills the pores while the evacuation is continued and slip is sucked into the hollow vessel until the slip emerges from the opening through which the hollow vessel is being evacuated.
348968
Austria Email Aktiengesellschaft
Macrae & Co.
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