B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
B07B1/50—Cleaning
B07B1/52—Cleaning with brushes or scrapers
B07B1/522—Cleaning with brushes or scrapers with brushes
Chapelet de ressorts helicoidaux loges respectivement dans des poches individuelles de retenue et suspension pour matelas de literie comprenant une pluralite de tels chapelets.