Winding – tensioning – or guiding – Strand tensioning device – Tortuous course
Patent
1982-09-03
1984-11-20
Gilreath, Stanley N.
Winding, tensioning, or guiding
Strand tensioning device
Tortuous course
242117, B65H 5428, B65H 7518
Patent
active
044834969
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a method of winding filamentary goods, in particular cables, on a drum, or spool having a drumlike core and end flanges; the goods to be wound are placed in individual windings located adjacent one another in layers on the core.
BACKGROUND
Cables are wound onto the drums required for transporting them and storing them--known as cable drums--in windings located adjacent one another such that the core is first completely covered with windings by a first layer, and then a second layer is wound in a corresponding manner over the first, and so forth, until the drum is full or the required length of cable has been wound. For each layer, the attempt is made to cause the cable to assume the shape of a cylindrical spiral as much as possible, with the individual windings being wound closely adjacent to one another. To this end, the cable being brought to the coil is conventionally not directed toward it during winding at the same angle of inclination as in the cylindrical spiral; instead, it is fed at an angle which deviates therefrom for the sake of providing a bias so that the winding being formed will be pressed as closely as possible against the adjacent winding already in place on the core. Depending upon the type and the characteristics of the goods to be wound, it is more or less difficult to attain the desired form of a cylindrical spiral for the second, and subsequent layers as well, once the first layer has been wound. As a rule, an operator is required for monitoring and correcting the winding process in order to attain the desired cylindrical spiral pattern. The reason for these difficulties is that at the beginning and end of the first layer between the first and last windings, respectively, and adjacent the end flanges, wedge-shaped gaps are formed, and the goods to be wound, for instance the cable, of the second layer tends to drop into this wedge to a greater or lesser extent. The error caused thereby is repeated in all the subsequent layers and is added to the irregularities occurring at the transition from one layer to the next. The more layers are wound, the greater the difficulty in forming an orderly transition from one layer to the next. A further problem is that layers disposed above one another are each in the form of one cylindrical spiral, and the windings of the various spirals cross over one another. When winding the goods onto a layer which has already been completed, it is frequently unavoidable for a portion of the winding now being formed to come loose from the winding immediately adjacent it and to drop into a part of the groove-like depression between two adjacent windings of the layer beneath it. The cylindrical spiral pattern is then completely destroyed, and the further windings take a zig-zagging course. The gap formed in a layer as a result may cause disruptions in the layer or layers above it. Such disruptions or irregularities in forming the layers impair the winding process, however, and may even cause damage to the goods being wound under some circumstances. Furthermore, an irregular coil is the result, which is undesirable.
THE INVENTION
It is an object to provide a method which makes it possible to wind even goods which are difficult to wind, such as cables, on a drum in such a manner that the danger of irregularities in the coil makeup is reduced to a minimum, so that it no longer becomes necessary for one person to be solely assigned to monitoring and correcting the winding process on a continuous basis.
Briefly, the goods to be wound are so guided that, for the major part of the circumference of one winding, the center line of the winding follows an annular, endless curve encompassing the core upon which the goods are wound; the goods are then, for a predetermined transitional zone representing a smaller portion of the winding circumference, guided axially to the next adjacent essentially circularly circumferential winding of the same layer. The individual windings of the first layer begin with a first winding located, outside the transit
REFERENCES:
patent: 1456108 (1923-05-01), Johannesen
patent: 1504005 (1924-08-01), Vienneau
patent: 1865236 (1932-06-01), Daniels
patent: 2732150 (1956-01-01), Le Bus, Sr.
patent: 3272454 (1966-09-01), Lane et al.
patent: 3610549 (1971-10-01), Wennerstrom
patent: 4005834 (1977-02-01), Landreau
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