Writing-core feeding mechanisms

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Propelling pencils > Writing-core feeding mechanisms

CPC:

Propelling pencils (projecting mechanisms for writing units B43K24/00; multiple-point writing implements B43K27/00) > Writing-core feeding mechanisms

IPC and CPC are identically structured here. All 6 subcodes exist in both systems.

1 shared codes have differing titles between IPC and CPC.

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B43K 21/027 with sliding tubelike writing-core guide since 1990 IPC+CPC Available in IPC and CPC
B43K 21/04 with the writing-cores brought into position by gravity +1 CPC IPC+CPC Available in IPC and CPC
B43K 21/06 with the writing-cores fed by means sliding in longitudinally-slotted casings IPC+CPC Available in IPC and CPC
B43K 21/08 with the writing-cores fed by screws +1 CPC IPC+CPC Available in IPC and CPC
B43K 21/16 with stepwise feed of writing-cores IPC+CPC Available in IPC and CPC
B43K 21/22 Writing-cores gripping means, e.g. chucks IPC+CPC Available in IPC and CPC

Class B43,2013–2023, worldwide · Source: EPO PATSTAT

Class B43,2013–2023, worldwide · Source: EPO PATSTAT