| 摘要 |
The present invention consists in employing conveyors and/or pushers in order to permit movable planes (7,110) to be advanced along bearing guides (1, 102) showing a quadrilateral shape. The advancing motion of the movable planes (7, 110) is caused by several devices which are housed in seats, suitably profiled, of the guides (1, 102). These devices are mounted on a peripheral chain line (3, 104). According to a first embodiment, the aforesaid devices are provided with a series of small bars (5) which are mounted on the chain (3) and supports magnetic elements (4) dragging metallic discs (6) applied under sliding planes (7). According to a second embodiment, the chain line (104) supports a series of plates (106) which are provided with pushers (108) working in contrast with a spring and pushing vertical stirrups (111) which are provided under the sliding planes (110). |
