Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B28
WORKING CEMENT, CLAY, OR STONE
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B28B
SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
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3/00
Producing shaped articles from the material by using presses; Presses specially adapted therefor
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B28B3/02
wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
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B28B3/08
with two or more rams per mould
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B28B3/083
The juxtaposed rams working in the same direction
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