| 摘要 |
PCT No. PCT/SE89/00418 Sec. 371 Date May 16, 1990 Sec. 102(e) Date May 16, 1990 PCT Filed Jul. 24, 1989 PCT Pub. No. WO90/01011 PCT Pub. Date Feb. 2, 1990.A conveyor comprises an endless conveyor belt (1) which along part of its length follows a path consisting of a number of helically extending turns laid upon each other, and a supporting installation (8, 9, 19) consisting of two endless chains (8, 9) which are carried by supports (19) and support the lowermost of the helically extending belt turns by supporting the belt edge portions along this turn. A second endless conveyor belt (1') is of substantially the same shape as the first-mentioned conveyor belt (1) and follows along part of its length a path consisting of a number of helically extending turns laid upon each other and alternating with the turns of the first-mentioned conveyor belt. With the exception of the lowermost turn of the first-mentioned conveyor belt (1), each turn of one (1,1') of the conveyor belts is supported by an underlying turn of the other conveyor belt (1'; 1), and vice versa, via spacing members (6, 6') arranged adjacent the belt edges, such that a self-supporting belt pile (2) is formed of the helically extending turns of said two conveyor belts.
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