An Overview of Sago Industry Development, 1980s2015
The pith scrapper was replaced by the screw mill (Fig. ), whereby the split trunk is fed with the bark sideway onto rotary screwlike blades to cut and scrape the pith in a continuous all the above debarking operations, the capacity was small. More energy has to be used in subsequent hammer milling of the large amount of pith removed by scraper and screw mill.