for imparting permanent twist

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Spinning or twisting arrangements > for imparting permanent twist

CPC:

Spinning or twisting arrangements (for open-end spinning D01H4/00) > for imparting permanent twist

IPC and CPC are identically structured here. All 8 subcodes exist in both systems.

2 shared codes have differing titles between IPC and CPC.

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D01H 7/04 Spindles +4 CPC IPC+CPC Available in IPC and CPC
D01H 7/24 Flyer or like arrangements IPC+CPC Available in IPC and CPC
D01H 7/52 Ring-and-traveller arrangements IPC+CPC Available in IPC and CPC
D01H 7/66 Cap arrangements IPC+CPC Available in IPC and CPC
D01H 7/74 Cup or like arrangements IPC+CPC Available in IPC and CPC
D01H 7/86 Multiple-twist arrangements, e.g. two-for-one twisting devices +4 CPC IPC+CPC Available in IPC and CPC
D01H 7/88 Hollow-spindle arrangements (D01H7/86 takes precedence) IPC+CPC Available in IPC and CPC
D01H 7/90 Arrangements with two or more twisting devices in combination (D01H7/88 takes precedence) IPC+CPC Available in IPC and CPC

Class D01,2013–2023, worldwide · Source: EPO PATSTAT

Class D01,2013–2023, worldwide · Source: EPO PATSTAT