| 摘要 |
There is a cleaner (14) that is built as a brush roller and has, periodically from a second cylinder (9), an elevating lifting system (20,28) that is dependent on the rotation of the second cylinder (9). The cleaner's lifting system may be built, selectively, on one of the two cylinders (8,9), or as a cam gear on each of the two cylinders associated lifting systems (20,28;20,29). There may be a carrier (13) about a first link (16) and a second link (15) that is rotatable about the cleaner. The first and second links may be built on the carrier, and the carrier may have a rotating carrier positioning system (25) selectively on the first or second link.
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