Winding – tensioning – or guiding – Bobbin or spool – Open-work structure
Patent
1980-02-27
1982-09-14
Christian, Leonard D.
Winding, tensioning, or guiding
Bobbin or spool
Open-work structure
242129, 68198, B65H 7520
Patent
active
043491650
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a coil carrier with interconnected carrier elements extending parallel to its axis and projecting radially outwardly into a common cylindrical surface.
Coil carriers for thread and yarn packages are already known that can be compressed or telescoped in the axial direction and are used for the wet treatment of thread and yarn packages, for example during dyeing.
A known coil carrier of this kind consists of two sleeve portions of equal diameter and comprise carrier elements which extend parallel to the axis and are equally spaced circumferentially, the carrier elements of the one sleeve portion engaging in gaps between the carrier elements of the other sleeve portion.
A coil carrier is also known which is not compressible itself but co-operates with like coil carriers in axial alignment. This coil carrier comprises carrier elements which extend parallel to its axis and are secured to an end ring. Between each two carrier elements, the end ring is provided with an aperture into which a carrier element of an adjacent coil carrier can be introduced. Consequently, it is also possible in this known coil carrier to reduce the original axial length by compression.
Further, a coil carrier is known comprising an axially and radially flexible wall formed by elastically and/or plastically flexible elements and rigid longitudinal webs which connect these elements and extend axially. The flexible elements are axially spaced rings and the axially successive longitudinal webs connecting these rings are circumferentially offset. This means that when the known coil carrier is axially compressed, its wall will necessarily assume a smaller diameter.
The production of such a known coil carrier calls for a relatively expensive mould and in addition it necessarily results in an interrelationship between axial compression and a reduction in diameter, which is now always desired. Also, internesting of these coil carriers is not possible to reduce their volume for transport purposes.
The problem of the present invention is to construct a coil carrier of the aforementioned kind so that, in conjunction with like coil carriers, it permits axial compression of the thread or yarn packages and also a reduction in diameter, both effects not being necessarily interrelated. This is to be achieved with a simple construction and the possibility of troublefree production of the coil carrier.
This problem is solved according to the invention in that the individual carrier elements are circumferentially compressible, that substantially shape-retaining coupling members are provided between two adjacent carrier elements, and that the gap between two adjacent carrier elements is larger than the dimension of a carrier element in the circumferential direction. A plurality of coil carriers of this kind can be partially telescoped in order thereby to reduce the axial length of thread and yarn packages. Compression of the carrier elements in the circumferential direction shortens the circumference and thus produces a reduction in diameter. Accordingly, a simply constructed coil carrier of this kind results in a carrier which is axially as well as radially compressible.
The invention provides for each carrier element to have a radially inwardly open V-shaped cross-section with limbs compressible towards each other. However, other cross-sectional shapes are also possible, for example U-shaped as well as arcuate.
According to a further embodiment of the invention, provision is made for each carrier element to be formed by two parallel limbs interconnected near the ends of the coil carrier. In both embodiments of the carrier elements, the sections are simple and compressible in the circumferential direction.
The invention further provides for the inner faces of the carrier elements to lie on a cylindrical surface at least in the zone projecting beyond the outermost coupling member, the diameter of the cylindrical surface being equal to or larger than the diameter on which the outer faces of this coupling member are disposed. It foll
REFERENCES:
patent: 3718287 (1973-02-01), Sottosanti
patent: 4078740 (1978-03-01), Hahm et al.
patent: 4180219 (1979-12-01), Becker et al.
Henning Walter
Illig Heinz-Peter
Christian Leonard D.
Zimmerman Jos.
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