The apparatus has a base mounted on castors and upon which a telescopic post is mounted. A winch is mounted on the top of the post. A roll of flexible material is mounted on a bed and is rotatable about the post, The winch raises and lowers the bed so that the height of the roll may be adjusted to that...http://www.google.es/patents/US6991195?utm_source=gb-gplus-sharePatente US6991195 - Wrapping apparatus
