Textiles: spinning – twisting – and twining – Apparatus and processes – Elements
Patent
1981-03-09
1983-03-29
Petrakes, John
Textiles: spinning, twisting, and twining
Apparatus and processes
Elements
D01H 732
Patent
active
043779310
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention concerns a flyer with two flyer arms and with an enclosed guide duct comprising a straight guide tube for a roving, which at a spinning position of a spinning preparatory machine is guided from a drafting arrangement through the guide duct over a presser finger, which at its free end is provided with a yarn guide.
From British Pat. No. 380,745 a flyer is known, in which two flyer arms are formed by steel tubes, and which is provided with two additional auxiliary arms. The lower ends of these four arms are stiffened by a hoirzontal ring. As seen from the point of view of solidity or strength, this flyer can achieve high rotational speeds. In this flyer, however, no presser finger is provided, and thus the deposition of the roving onto the bobbin tube is uncontrolled and thus is effected with insufficient exactness. Furthermore, the duct for the roving is partially open, which detrimentally influences the roving quality.
In a flyer design known from German Pat. No. 1,685,910 the flyer is designed as an open flyer. The flyer arm guiding the roving, or both flyer arms, comprise an inner steel tube, which is surrounded by aluminium, stiffening of the flyer being aimed at mainly when using this arrangement. For the presser finger used for guiding the roving a special presser rod is provided. This presser rod adds an additional weight, which (for symmetry reasons) is to be compensated for at the other arm and thus is doubled. The lack of the horizontal ring in this second mentioned known arrangement implies the disadvantage that the mutual distance of the lower ends of the flyer arms increases at high rotational speeds of the spinning flyer. In consequence of this the quality of the roving suffers and it is no longer properly and evenly wound onto the bobbin tube. Enlargement of the distance between the flyer arms furthermore creates the danger of flyer breakages and thus the danger of injuries to the personnel.
SUMMARY OF THE INVENTION
These disadvantages are to be avoided according to the present invention. The invention is characterized in that the bottom ends of the flyer arms are connected with a ring, that the straight guide tube is supported in an upper and in a lower pivoting bearing and is supported to be rotatable about its longitudinal axis, and that the presser finger is rigidly connected with the guide tube.
Obviously, noticeably less weight is added to the flyer if the horizontal ring is provided, than must be added for stiffening the flyer arms if these are not provided with a horizontal ring. Based on the fact that the guide tube does not exert any support function, a further advantage is seen in that the guide tube can be made from any suitable desired material, e.g. also partially from a ceramic material.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be better understood and objects other than those set forth above, will become apparent when consideration is given to the following detailed description thereof. Such description makes reference to the annexed drawings wherein:
FIG. 1 is a section of a flyer seen from its side; and
FIG. 2 is a horizontal section along line II--II of FIG. 1 in an enlarged view.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
In both Figures, identical structure has been designated with the same reference characters.
The flyer shown in FIG. 1 comprises a hollow cylinder 12 provided with a bore 11, the hollow cylinder 12 being rotatably supported in a bearing (not shown). From this cylinder 12 there extends an arm portion 14 comprising a tubular supply duct 13. This arm portion 14 together with a vertical arm portion 15, which is not visible in FIG. 1 because it is located behind a guide tube 22 depicted in FIG. 1 but is shown in FIG. 2, forms, as a rigid unit, one arm 14,15 of the flyer. From the hollow cylinder 12 there furthermore extends a second flyer arm 16 consisting of an inclined portion and a vertical portion.
The bottom ends of the arm 14,15 and of the arm 16 are connected with a horizonta
REFERENCES:
patent: 355794 (1887-01-01), Smith
patent: 1103654 (1914-07-01), Burlin
patent: 3157020 (1964-11-01), Schwager
patent: 3216185 (1965-11-01), Gallina
patent: 3782099 (1974-01-01), Schwager
patent: 4060969 (1977-12-01), Costales et al.
Novak Peter
Tanner Bruno
Kleeman Werner W.
Petrakes John
Rieter Machine Works Limited
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