DIFF Subgroup
B29C 48/18 the components being layers
Introduced: January 2019
Full Title
Full titles differ between systems:
IPC:
Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor > Articles comprising two or more components, e.g. co-extruded layers > the components being layers
CPC:
Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor (extrusion blow-moulding B29C49/04) > Articles comprising two or more components, e.g. co-extruded layers > the components being layers
Of 6 combined children, 5 exist in both systems.
1 codes are CPC-only extensions.
IPC defines codes here since 2019.
Child Classifications
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- B29C 48/20 one of the layers being a strip, e.g. a partially embedded strip since 2019 IPC+CPC Available in IPC and CPC
- B29C 48/22 with means connecting the layers, e.g. tie layers or undercuts since 2019 IPC+CPC Available in IPC and CPC
- B29C 48/23 with means for avoiding adhesion of the layers, e.g. for forming peelable layers since 2019 IPC+CPC Available in IPC and CPC