B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
B43L19/00—Erasers, rubbers, or erasing devices; Holders therefor
B43L19/0025—Eraser or rubber material, e.g. comprising hard particles
B—PERFORMING OPERATIONS; TRANSPORTING
B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
B02C13/18—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor
B02C13/1807—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate
Landscapes
Engineering & Computer Science
(AREA)
Food Science & Technology
(AREA)
Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products
(AREA)