GREENHOUSES, FILMS FOR COVERING GREENHOUSES AND METHODS FOR STRETCHING OR TIGHTENING FILMS ON GREENHOUSES

摘要

The cloche comprise two hoops (2), over which plastic sheet (3) is stretched. This has one or more longitudinal pockets (4), into which rods (5) are inserted. These can be rotated to tension the sheet. Independent claims are included for: (a) the sheet; and (b) a method for holding the sheet taut, as described above.