Winding – tensioning – or guiding – Coil holder or support – Mounted coil holder or spindle
Reexamination Certificate
2000-05-05
2001-12-11
Walsh, Donald P. (Department: 3653)
Winding, tensioning, or guiding
Coil holder or support
Mounted coil holder or spindle
C242S597700, C242S139000, C112S302000
Reexamination Certificate
active
06328254
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a spool holder for sewing machines. More particularly, the invention relates to a honeycomb shaped spool holder for holding a cone shaped thread about a spindle on a sewing machine.
A variety of thread holders have been proposed for use with sewing machines, and some in particular have been designed specifically for holding industrial sized serger threads, that are commonly available wound around a cone shape spool. Typically, spool holders tend to jump up and wobble as the spool holders rotate at a high angular velocity as the thread is dispensed from the spool. The preexisting spool holders suffer from various disadvantages in that such spool holders generally have weak construction and have a tendency to easily crack or break during use. Therefore, it is highly desirable to have an improved spool holder which is highly durable in construction, capable of withstanding a wide range of dynamic forces that may be experienced during a sewing operation. The present invention addresses this problem by providing a honeycomb shaped spool holder having an inner cylindrical hub, an outer conical member, and a plurality of partition walls extending in an axial direction therebetween in such manner as to sufficiently reinforce its overall structure to resist breakage during normal operations.
While these units mentioned above may be suitable for the particular purpose employed, or for general use, they would not be as suitable for the purposes of the present invention as disclosed hereafter.
SUMMARY OF THE INVENTION
It is an object of the invention to provide a honeycomb shaped spool holder which is simple in construction to minimize manufacturing costs and thereby making it available for the average consumer.
It is another object of the invention to provide a honeycomb shaped spool holder having an inner cylindrical hub, an outer conical member, and a plurality of partition walls extending in an axial direction therebetween in such manner as to sufficiently reinforce its overall structure to resist breakage during normal operations.
It is yet another object of the invention to provide a honeycomb shaped spool holder which has an overall truncated conical exterior configuration sized and shaped to frictionally engage with the interior surfaces of a cone shaped spool core.
The invention is a honeycomb shaped spool holder for use with sewing machines having at least one upstanding spool support spindle, comprising an inner cylindrical hub which has a central bore extending therethrough for vertically receiving the spindle of a sewing machine in such a manner as to permit the holder to freely rotate thereabout as the thread is dispensed. The spool holder further comprises an outer member having an overall truncated conical configuration sized and shaped to frictionally engage the interior surfaces of a cone shaped spool core, and has a plurality of partition walls extending in an axial direction between the inner hub and the outer member such that a spoke or honeycomb pattern is formed. The partition walls help to sufficiently strengthen the structure of the spool holder, so that the spool holder can withstand a wide range of dynamic forces that may be applied thereto while it rotates at a high angular velocity about the spindle as the thread is drawn from the thread spool.
To the accomplishment of the above and related objects, the invention may be embodied in the form illustrated in the accompanying drawings. Attention is called to the fact, however, that the drawings are illustrative only. Variations are contemplated as being part of the invention, limited only by the scope of the claims.
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Goldstein Law Offices P.C
Pham Minh-Chau
Walsh Donald P.
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