Textiles: fiber preparation – Working – Combing
Patent
1990-10-22
1992-07-21
Schroeder, Werner H.
Textiles: fiber preparation
Working
Combing
19215, 19225, 19235, D01G 1916
Patent
active
051311178
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a straight combing machine for combing a sliver of fibres, particularly woollen fibers, comprising a support structure, a circular comb rotatably mounted on the structure, means for supplying the fibres to the circular comb and means for removing the combed fibres from the circular comb.
In conventional combing machines in which the means for removing the combed fibres comprise, as is known, a pair of detaching rollers and a leather sleeve which is interposed between the detaching rollers to improve the grip and serves as a conveyor plane for the tufts, the slivers of fibres normally supplied include fibres having an average length of more than 45-50 mm. These fibres, which have been washed and subsequently carded, are subjected to conventional combed spinning after the combing process.
With so-called "short" wools, that is with fibres having an average length of less than 40-45 mm, a problem arises with conventional straight combing machines in that too many fibres are discarded (noil) which means that the combing of short wools is not economically worthwhile.
SUMMARY
The object of the present invention is to provide a combing machine and a combing method which overcome the aforesaid problem.
According to the invention, this object is achieved by virtue of the fact that the means for removing the fibres from the circular comb comprise pincers for gripping the fibres and detaching them from the circular comb.
The use of pincers for gripping the ends of the tufts enables closer approach to the fixed comb and thus enables shorter tufts to be combed.
Suction means are preferably associated with the pincers for transporting the combed fibres to fibre-collection means when the pincers open.
As well as ensuring that the end of the tuft is arranged correctly to be gripped by the pincers, the suction means thus also remove the fibre flocks pneumatically to a storage device.
In current combing machines, in order to improve the penetration of the fibre tufts between the teeth of the comb, so-called mechanical "embedding" devices are used for urging the fibres towards the teeth of the comb to increase the combing efficiency.
As well as being quite complex structurally, these mechanical devices limit the number of beats per minute effected by the combing machine, thus restricting any increase in the productivity of the machine. Conventional embedders also require accurate regulation in relation to the timing of the circular comb.
In order to overcome this further problem, the combing machine of the present invention, which is of the type in which the circular comb is in the form of a hollow cylinder, also has a substantially longitudinal elongate aperture in the side wall of the comb, the interior of the circular comb being in communication with a vacuum source so as to encourage the penetration of the fibres of the silver between the teeth of the comb by suction.
By virtue of this further characteristic, it is no longer necessary to use so-called mechanical "embedding" devices which, because of the complexity of their structure, drive and setting up, limit the productivity of the machine.
With the use of suction towards the interior of the circular comb to embed the fibres in the teeth of the comb, it is possible to increase the operating rate (cycles per minute) of the machine without mechanical problems.
BRIEF DESCRIPTION OF THE DRAWING
Further characteristics and advantages of the combing machine and of the method of the invention will become clear from the detailed description which follows with reference to the appended drawings, provided by way of non-limiting example, in which:
FIG. 1 is a perspective view of a combing machine according to the invention,
FIG. 2 is a section taken on the line II--II of FIG. 1,
FIG. 3 is a view similar to FIG. 2 showing a different stage in the working cycle of the machine,
FIG. 4 is a view similar to FIGS. 2 and 3 and shows a further stage in the working cycle of the machine,
FIG. 5 is a view of a detail of FIG
REFERENCES:
patent: 2977642 (1961-04-01), Edfors
patent: 5029366 (1991-07-01), Bischofberger et al.
patent: 5060346 (1991-10-01), Bischofberger et al.
Gallo Carlo
Mirra Dino
Calvert John J.
Pettinatura Europa S.r.l.
Schroeder Werner H.
LandOfFree
Straight combing machine for wool and a combing method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Straight combing machine for wool and a combing method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Straight combing machine for wool and a combing method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-835411