Textiles: spinning – twisting – and twining – Apparatus and processes – Monitor and record
Reexamination Certificate
1999-10-27
2001-08-21
Calvert, John J. (Department: 3741)
Textiles: spinning, twisting, and twining
Apparatus and processes
Monitor and record
C057S263000, C057S264000, C057S278000, C073S160000
Reexamination Certificate
active
06276122
ABSTRACT:
BACKGROUND
The present invention concerns an apparatus for the guidance of a spun thread in a spinning station.
It is known that thread monitoring devices are mounted on spinning machines for the monitoring of the run of thread. Moreover, in spinning machines with filament cleaning, the wound filament quality is monitored by means of a measuring instrument. The position of the thread monitor follows a withdrawal apparatus and is free of access for automation equipment. Known thread monitors operate in accord with the optical principle of a bifurcated light relay. Moreover, these said thread monitors act to assure a reliable thread guidance but do not supervise the wound filament quality.
For the monitoring of wound filament quality, it is necessary that a thread run is provided which is smooth and closely parallel to the measuring sensor. Further, in the installation of the measuring head, care must be taken that sufficient space is available about the measuring head in order to provide the head with a recognition means for detecting unwanted fibers.
Because of the traverse motion of the thread following the withdrawal apparatus, it is not possible to guarantee a smooth and stable thread run after the withdrawal apparatus. On this account, the measuring head for the monitoring of the wound filament quality cannot be located after the withdrawal apparatus.
SUMMARY OF THE INVENTION
Thus, a purpose of the present invention is to make possible a smooth and stable guidance of the thread between a withdrawal apparatus and a transversing apparatus, and to so design this that both the run of the thread and the quality of the wound filament are monitored. Additional objects and advantages of the invention will be set forth in part in the following description, or may be obvious from the description, or may be learned through practice of the invention.
This purpose will be achieved by the features in the invention wherein an apparatus for the guidance of a spun thread (
3
) in a spinning station is provided, wherein, after the thread (
3
) has been produced, it runs in its travel direction through a withdrawal device (
4
), a measuring instrument (
7
) and a traversing apparatus (
9
), therein characterized, in that between the measuring instrument (
7
) and the traverse apparatus, at least one deflection roll (
8
) is arranged.
After its production, the thread, in an already established direction, runs through a withdrawal apparatus and thereafter through a measuring instrument and into a traversing apparatus. The essence of the invention is that between the measuring instrument and the traversing apparatus, at least one deflector roll has been inserted. By means of the stationary deflector device, a smooth and stable run of the thread is maintained between the withdrawal apparatus and the deflector roll. In this way, the measuring instrument can monitor the thread run as well as the wound filament quality. In an advantageous manner, the deflector roll is so placed that the necessary conditions for the installation of a thread supervision device, i.e. a measuring head, are fulfilled. To serve as a measuring instrument, a thread monitor or a measuring head can be considered.
In order to keep threads of differing diameters running with axial precision, the deflector roll possesses a special, V-shaped groove. Since there is relative movement between the deflector roll and the running thread, the groove avoids a detrimental action on the wound filament composition.
Additional advantage is provided when the opening angle of the groove is greater than the angle between the most extreme positions of the traverse. The traverse operates through a relative movement at right angles to the running thread in order to wind the thread onto a spool. The greater opening angle of the V-groove takes care that the thread is not drawn over the edge of the groove by the traversing movement. Advantageously, the angle is not made too large in order to prevent that the traverse movement from extending itself back onto the run of the thread between the withdrawal apparatus and the deflector roll. Since no eyelet is required for the guidance of the deflector roll, an automatic server can lay the thread in the groove without any problem.
Even so, it is of advantage if the measuring instrument between the withdrawal apparatus and the deflector roll is designed for the measurement, that is the monitoring, of both the thread run and the quality of the wound filament.
Thus, with such a measuring instrument, both tasks can be carried out simultaneously or in alternation, so that exchanging the measuring instrument upon change of the monitoring purpose is no more required. Beyond this, costs are reduced, since only one measuring instrument is required. Likewise, production costs are substantially reduced, because, for instance, supply lines for a measurement instrument are no longer required beneath the withdrawal apparatus.
In a development of the invention, the measuring instrument is designed for the monitoring of the wound filament quality and in addition to this issues at least one, preferably digital, signal for the monitoring of the run of the thread. Advantageous for such a case, is that where spinning machines with wound filament monitoring are concerned, the thread monitor is not necessary since both monitoring operations are possible with only one instrument. Where instrumentation is concerned, such a use reduces the production costs per spinning station. The additional digital signal of the measurement instrument displays the run of the thread.
It is particularly favorable if, between the measurement instrument and the deflector roll, a distance of 2 to 50 mm is observed. This enables a uniform quality wind-up of the spun thread onto the spool arrangement.
An embodiment of the invention will be shown in greater detail with the help of the drawings.
REFERENCES:
patent: 3335046 (1967-08-01), Current et al.
patent: 3380676 (1968-04-01), Jenny
patent: 4716718 (1988-01-01), Gobbels et al.
patent: 5330115 (1994-07-01), Mayer et al.
patent: 5592849 (1997-01-01), Nakade et al.
patent: 5799476 (1998-09-01), Bahlmann
patent: 1184449 (1964-12-01), None
German Patent Office Search Report, May 6, 1999.
Bahlmann Bernd
Buchner Thorsten
Schuller Edmund
Calvert John J.
Dority & Manning
Hurley Shaun R
Rieter Ingolstadt Spinnereimaschinenbau AG
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