B - Operations – Transporting – 28 – B
Patent
B - Operations, Transporting
28
B
25/101, 25/71
B28B 7/36 (2006.01) B28B 7/34 (2006.01) B28B 11/04 (2006.01) B28B 19/00 (2006.01)
Patent
CA 2002029
A mold surface is first treated with an enameling composition which, while still unfused, is provided with a distribution of particulate material such as sand; the mold surface is then fired and then a second coating of predetermined thickness is applied over the first coating including the particulate material followed by a second firing to finish the mold.
Burns & Russell Company Of Baltimore (the)
Moffat & Co.
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