The spinning or twisting of staple fibre yarns (i.e. comprising fibres of discrete length); e.g. cotton or wool spinning.

the spinning processes where twist is inserted into a fibre strand, without interrupting the fibre strand.

the cases where the supply package provides the twist.

the cases where twist comes from the collecting bobbin, and corresponds for example to ring spinning and similar processes.

a spinning process in which a yarn is twisted and wound onto a revolving bobbin surrounded by a ring that moves up-and down, and caries a traveller set in motion by the yarn.

a spinning process in which a yarn (typically coarse woollen yarn) is twisted by a rotating flyer arm, that winds it onto a bobbin that is free to rotate.

a spinning process in which a yarn (typically woollen yarn) is twisted and wound onto a revolving bobbin situated inside a stationary cap.

centrifugal spinning, where a yarn mass (or cake) is formed inside or on a rotating element, e.g. a pot, which at the same time imparts twist and collects the yarn.

twisting of several yarns, whereby one spindle turn causes several twist turns in the assembled yarn (obtained e.g. by multiple yarn reversal points in the yarn run path).

spinning techniques like friction spinning or air jet spinning, provided there is no fibre flow interruption.

air-jet spinning by false twist.

If the disclosure of the document to be classified does not clearly identify if the fibre flow is interrupted or not in an air-jet spinning nozzle, this class is given jointly with D01H 4/02.

a discontinuous spinning process in which the drafting and twisting stage is performed separately from the subsequent winding stage; e.g. spinning mule.

the spinning processes where twist is inserted into a fibre strand, whereby an interruption of the fibre strand takes place in order to insert twist; e.g. the fibres are taken out from the strand and blown into a rotor that turns at high speed.

open-end air jet spinning.

If the disclosure of the document to be classified does not clearly identify if the fibre flow is interrupted or not in an air-jet spinning nozzle, this class is given jointly with D01H 1/115

open-end friction spinning.

the individualisation of fibres that are to be fed into the spinning region, e.g. by little opening rollers.

the piecing in an open-end spinning machine, after a machine stop or spinning incident.

Drafting machines as stand alone, as well as drafting arrangements in spinning machines. Slivers are drafted into slivers, rovings or fibre strands by the action of progressively accelerating drafting cylinders.

Drafting machines having fibre control arrangements placed between the drafting cylinders; said control elements are pinned bars. The machines themselves are called gill boxes, and are used in long staple (i.e. wool, flax) spinning preparation.

drafting machines with other or no fibre control means between the drafting rollers, e.g. cotton preparation drafting machines or drafting arrangements on spinning machines.

means used to regulate the draft in predefined patterns or in response to irregularity detection.

adjustment means to change distances between rollers or roller pairs.

means to exert a load or pressure on a roller or rollers, to ensure an adequate nipping of fibres.

The structures and frames that hold the drafting arrangement(s) in spinning machines.

Means to realize a lateral movement of drafting rollers, e.g. to reduce local wearing of rollers.

Guides that are placed in or after the drafting zone, to control and narrow the path followed by the fibres.

roller assemblies that lie in a loose manner on the fibre strands in the drafting zone of a spinning machine, thereby exerting mild fibre control.

rollers with structured surfaces, e.g. lower metallic drafting rollers with helical grooves in a drafting machine.

roller with a generally soft coat like rubber, e.g. upper drafting rollers of a spinning machine.

needled rollers, used to control fibres in a drafting zone.

aprons and arrangement with aprons to control fibres in a drafting zone.

arrangements for coupling bobbins or like to spindles of spinning machines.

The logistical aspects taking place on empty or full bobbins and receptacles on spinning machines.

Auxiliary devices of spinning or twisting machines.

Warning and safety devices, as well as online measurement arrangements able to provide a warning signal; e.g. yarn breakage detection on ring spinning machine.

On-line quality control and measuring devices, like length or evenness measurement.

If the measurement can lead to a warning or stop signal (e.g. in case of evenness lying outside an acceptable range), class D01H 13/14 is also given.

The piecing (repair) of yarn interruptions due to breakage or machine stop on machines.

Piecing arrangements in machines for producing textile fabrics, see in the appropriate subclasses.

Hand tools for spinning and twisting, e.g. yarn threaders, portable yarn splicers, hand tools for applying travellers to rings etc.