DIFF Subgroup
B07B 1/14 Roller screens
Introduced: September 1968
Full Title
Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like > Apparatus having only parallel elements > Roller screens
Of 2 combined children, 1 exist in both systems.
1 codes are CPC-only extensions.
IPC defines codes here since 1974.
Child Classifications
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- B07B 1/15 using corrugated, grooved or ribbed rollers since 1974 +1 CPC IPC+CPC Available in IPC and CPC