SCRAPED SURFACE EVAPORATORS
The present invention relates to scraped surface evaporators (10), and in particular to scrapers (30) for use in scraping the surface of the evaporator (10). Such scraped surface evaporators (10) comprise a refrigerated drum (12), the inner surface of which is scraped by the scraper(s) (30). The scraper is mounted on drive means (16), which are arranged to rotate about the longitudinal axis of the drum (12). The scraper comprises a leading edge region (32) and a trailing edge region (34), with the leading edge formed into a blade (44). A biasing force is applied to the scraper (30) so that the blade (44) and a trailing edge (48) are biased into contact with the surface (46) to be scraped.