| 发明名称 |
Apparatus for manufacturing precast concrete articles |
| 摘要 |
A system for molding concrete articles such as paving stones, including a rack having opposing first and second vertical walls that have corresponding rails, and trays that include article molds adapted to receive concrete for curing, the trays being sized and constructed to slide on the rails.
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| 申请公布号 |
US5143344(A) |
申请公布日期 |
1992.09.01 |
| 申请号 |
US19910798614 |
申请日期 |
1991.11.26 |
| 申请人 |
JOHNSON BROTHERS PRECISION PRECAST PRODUCTS, INC |
发明人 |
JOHNSON, DAVID L.;JOHNSON, ROBERT A. |
| 分类号 |
B28B5/04;B28B7/26;B28B13/02;B28B17/00 |
主分类号 |
B28B5/04 |
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