Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1995-01-27
1997-02-18
Mansen, Michael R.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
2421183, 2421585, 2426072, B65H 5400, B65H 7510, B65H 7528
Patent
active
056034601
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Filed of the Invention
The invention relates to spools, cones and like devices for holding windings of thread. It is particularly applicable to packages, upon which is wound sewing thread for industrial applications.
2. Description of the Prior Art
In the clothing manufacture industry, for example, there is an increasing demand for garments to be made in small numbers at a time. Sewing thread for the making up of garments has traditionally been supplied in a number of different formats, principal among which is a cone carrying 5000 to 10000 m of thread. Where smaller quantities of thread are needed, a cop spool may be preferred, which carries typically 1000 m. The terms "thread" and "yarn" are used more or less interchangeably herein, or as idiom demands.
The large capacity of the cone can be a disadvantage as production runs become smaller and large amounts of thread are often wasted. The cop spool is a small diameter tube so that the innermost turns of yarn may be undesirably tightly coiled. Because of the small capacity of cop spools, they may need to be replaced frequently, which is time consuming because the thread from the two spools needs to be joined.
Of course, an intermediate size of spool would be possible but it is inconvenient for all concerned to deal with too many different standard sizes and, besides, it will not always be clear in advance how much thread will be required in which formats.
The term "cone" as used in this specification is not intended to limit the shape of the spool on which the thread is wound and includes, inter alia, spools of generally frustoconical and cylindrical shape.
SUMMARY OF THE INVENTION
The invention provides a cone on which thread is wound, the cone having a central frangible section at which it may easily be broken into two parts generally perpendicularly to its axis and the thread forming a winding on the cone at each side of the frangible section, leaving a space between the windings where the thread crosses the frangible section.
In a preferred embodiment, the cone includes means for attaching together the two cone parts after the frangible section has been broken, so as to reduce the space between the respective windings. This may be achieved by one cone part being partially inserted in a hollow in the other cone part, where it is removably retained by engagement between protrusions on the respective parts.
The surfaces of the cone supporting the windings on each side of the frangible section may both taper slightly in the same axial direction.
The invention also provides a method of winding thread on a cone having a central frangible section, the method comprising the steps of: (a) rotating the cone while supplying thread through a yarn guide that reciprocates relative to a datum and parallel to the axis of the cone to wind thread on the cone at one side of the frangible section; (b) advancing the yarn guide datum through a fixed distance along the axis of the cone and (c) rotating the cone while supplying thread through the reciprocating yarn guide to wind thread on the cone at the other side of the frangible section.
A preferred method includes the further step of (d) breaking the frangible section of the cone and urging the two cone parts axially towards one another to attach the parts removably together with a reduced space between the two windings.
The cone of the invention will typically be wound with a similar length of yarn to the known cone, i.e. 5000 to 10000 m. However, because the thread is in the form of two windings on either side of a frangible section, the new cone may be snapped in half to give two independent cones, each with approximately half the amount of thread. The two cones will be linked by a single thread, which can be easily cut or broken. If the cone is not broken, the thread will simply be withdrawn from one winding first and then the other, with no need for intervention at the halfway stage. Thus the invention allows the thread manufacturer to supply a single product, while allowing the pur
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Donisthorpe & Company Limited
Mansen Michael R.
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