| 摘要 |
1482582 Spill plates in colliery conveyer systems PERARD ENG Ltd 24 March 1975 [29 March 1974] 13929/74 Heading B8A A spill plate 30, associated with a conveyer 11, and a mining machine (not shown), has a top edge which is rolled to define a hollow rib 31 with a smooth outer surface. Successive spill plates may be joined by means of dowels 50, which are secured by the action of a pin 43 cooperating with an L-shaped slot 36 in the rib 31, and apertures 42 in the dowel. An alternative layout for the top edge of the spill plate is shown in Fig. 2.
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