Plastic article or earthenware shaping or treating: apparatus – Means withdrawing trowel type shaping member from within...
Reexamination Certificate
2006-01-10
2006-01-10
Utech, Benjamin L. (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Means withdrawing trowel type shaping member from within...
C425S426000, C425S460000, C264S312000
Reexamination Certificate
active
06984118
ABSTRACT:
The invention concerns a procedure for the production of tubes from concrete mix, whereby the concrete mix is filled into a shaping device, for the purpose of shaping, where it is condensed with a tool. The invention should enable an effective and fast production of concrete tubes with high quality regarding the uniformity of the material characteristics. In such a procedure the concrete mix is condensed in an interspace between two parts of a tool that rotate relative to each other.
REFERENCES:
patent: 3192292 (1965-06-01), Banks
patent: 3746494 (1973-07-01), Gauger
patent: 5456590 (1995-10-01), Volmari
patent: 6106749 (2000-08-01), Adly
patent: 623624 (1933-09-01), None
patent: 210872 (1924-02-01), None
patent: 430734 (1933-09-01), None
Benzin Torsten
Kuch Helmut
Martin Jurgen
Schwabe Jorg-Henry
Institut fur Fertigteiltechnik UND
Nguyen Thu Khanh T.
Patterson Thuente Skaar & Christensen P.A.
Utech Benjamin L.
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