| 摘要 |
771,049. Step-by-step conveyers. SMIDTH & CO. AKTIESELSKAB, F.L. Oct. 27, 1955, No. 30792/55. Class 78 (1). In the apparatus described in Specification 642,426 for simultaneously conveying material in bulk over a stationary gas-permeable support and subjecting the material to the action of air or other gas passed through it, each pair of bolts 4, which connects the conveying members 3 to the reciprocating beams 5, carries a weight 7 which maintains constant the pressure between the members 3 and their supports 1. Specification 657,454 also is referred to. |
