| 摘要 |
A device for centring boxes on a carrier, being fitted with rotating flaps over the carrier, the flaps being mounted symmetrically on vertical rollers placed on both sides of the carrier, which are fitted with back movement springs, characterised in that it consists of two gears (8, 10) and (8' and 10'), placed symmetrically in respect to a longitudinal axis of the carrier (2), whereby flaps (3, 3'), wheels and/or wheel sectors (5 and 5') and back movement springs (6 and 6') are mounted on vertical rollers (4 and 4'), whereby a tie transmission (11, 12, 11') is mounted on outgoing shaft pivots of a worm gear (10, 10').
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