APPARATUS FOR WINDING AND UNWINDING A PLASTIC FILM OF SIDE WALLS IN GREENHOUSES FOR OTHER USES

摘要

Winder roller apparatus for opening and shutting a wall of a greenhouse or tunnel by winding and unwinding a sheet of plastic film (1), with the sheet-winding roller (3) going up and down driven by an irreversible reduction gear (7,17) mounted on an oscillating plate (8) through the interposition of a transmission with double cardanic joint (5).