Information
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Patent Grant
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6361727
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Patent Number
6,361,727
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Date Filed
Thursday, February 24, 200024 years ago
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Date Issued
Tuesday, March 26, 200222 years ago
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Inventors
-
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Examiners
- Silbaugh; Jan H.
- Lee; Edmund H.
Agents
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CPC
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US Classifications
Field of Search
US
- 450 41
- 450 42
- 450 43
- 450 45
- 450 47
- 450 48
- 450 51
- 450 52
- 002 255
- 002 259
- 002 258
- 264 157
- 264 151
- 264 148
- 264 159
- 264 279
- 264 251
- 264 254
- 264 247
- 264 295
- 264 320
- 264 325
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International Classifications
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Abstract
Brassiere underwires are made in a three step process in which, initially, pairs of injection molded polyamide tips are formed on a continuous flexible strand of carbon fiber or aramid fiber material which can be baked to impart stiffness thereto. In a second step, the strand is cut between the tips to form lengths having the tips at extremities thereof. The lengths are then shaped in a half barrel or plate mold and baked to harden the materials.
Description
FIELD OF THE INVENTION
My present invention relates to a method of making brassiere underwires and to brassiere underwires made by the improved method.
BACKGROUND OF THE INVENTION
Brassiere underwires are generally composed of metal or plastic and can be received in a slender pocket stitched beneath For the cup of a brassiere or formed as part of a brassiere frame. The underwire in parts shape to the brassiere and retains the shape of the cup. It is known to provide such underwires with tips at the ends thereof to prevent the underwire from poking through the fabrication of the brassieres and injuring the wearer and to provide the underwire, in addition, with a sewing flange, holds the tip or like means to enable the underwire to be stitched in place in the brassieres.
When the underwire is composed of metal, it is usually covered by a sheath of a plastic material and the tips can be injection molded onto the shaped wire.
While brassiere underwires have undergone considerable developments in the last decade, earlier underwires are still unsatisfactory for a variety of reasons. For example, the underwire may have insufficient stiffness in one or more planes or maybe so stiff as to be uncomfortable. Tips may pull off the underwire or may be incapable of preventing the underwire from poking through the fabrication. The underwire may have to be accessibly large to provide the requisite degree of stiffness or composed of a material which is effected by laundering and drying in normal use. By and large, therefore, the fabrication of brassiere underwires has called for further improvement.
OBJECTS OF THE INVENTION
It is, therefore, the principal object of the present invention to provide an improved method of making a brassiere underwire, whereby drawbacks of earlier underwires and there methods of fabrication can be obviated.
It is also an object of the invention to provide an improved brassiere underwire.
Yet another object of the invention is to provide an article of manufacture which can be readily formed into a brassiere underwire.
SUMMARY OF THE INVENTION
These objects are attained, in accordance with the invention in a method of making brassiere underwires which comprises the steps of:
(a) forming a continuous strand of a hardenable material and applying at spaced-apart locations therealong, corresponding to desired lengths of brassiere underwires, pairs of thermoplastic tips each surrounding the strand;
(b) cutting the strand between the tips of each pair to separate the strand into successive lengths each having respective tips at extremities thereof; and
(c) shaping each of the lengths into a curved underwire shape and hardening the material of the shaped lengths to form a respective brassier underwire therefrom preformed with respective tips at the extremities thereof.
According to the invention, each of the pairs of tips are bridged by a thermoplastic web upon injection molding thereof onto the strand. The webs are cut away during the cutting of the strand into lengths. The lengths can be shaped in a half barrel mold in which the hardenable material, usually a carbon fiber or aramid fiber reinforced material such as a thermosetting resin can be baked as part of the hardening process.
Alternatively, the lengths can be shaped in cavities in a two plate mold.
According to a feature of the invention, the strand is formed as a fiber reinforced tube and that tube may be hollow or formed on a flexible polymeric core, e.g. of polyamide.
The tips are injection molded onto the continuous strand as thermoplastic members, e.g. of a polyamide.
Since the tips are formed on the strand at distances between them which determine the arc lengths and hence the size of the underwire for a particular size of brassieres, I may provide the tips of different colors as a function of the distances between the spaced apart locations so that the color of the tip can indicate the underwire size.
According to another feature of the invention, a sewing flange is formed on at least one of the tips of each pair. A soft zone can advantageously be provided between each tip and a hardened remainder of a respective length of each underwire.
According to yet another feature of the invention, the strand is originally formed with a circular cross section and that cross sectional shape is transformed into an oval during the molding and baking step.
The invention also is a brassiere can be comprised of an arcuate carbon fiber or aramid fiber wire segment formed with the injection molded tips at the extremities thereof and an article of manufacture adapted to produce brassiere underwires and which comprises the continuous strand of the hardenable material and pairs of plastic tips each surrounding the strand and located at spaced apart locations there along so that, when the strand is cut between the tips of each pair, individual lengths are formed which can be shaped to form the brassiere underwire.
BRIEF DESCRIPTION OF THE DRAWING
The above and other objects, features, and advantages will become more readily apparent from the following description, reference being made to the accompanying drawing in which:
FIG. 1
is an elevational view of a strand formed in the first step of the method of the invention;
FIG. 2
is a detailed view showing the pair of tips molded into the strand;
FIG. 3
is a cross sectional view taken along the lines IIIāIII of
FIG. 2
;
FIG. 4
is a diagrammatic perspective view showing the use of a half barrel mold in shaping the brassiere underwires;
FIG. 5
is a cross sectional view showing the step of imparting an oval shape to the strand;
FIG. 6
is an elevational view of the underwire product; and
FIG. 7
is a diagrammatic perspective view showing a two plate mold for shaping the underwires.
SPECIFIC DESCRIPTION
In
FIG. 1
I have shown a continuous strand
10
which can be composed of a fiber-reinforced thermosetting synthetic resin which can be baked to harden the strand but which is extruded and after being extruded is provided with pairs
11
of thermoplastic polyamide tips
12
and
13
interconnected by webs
14
at distances D defining the lengths of respective underwires. The distance D, of course, defines the size of the underwire and the thermoplastic tips can have different colors corresponding to the different sizes of underwires which are produced.
As can be seen from
FIG. 2
, the web
14
can be cut away in the next step of processes to leave the tips
12
and
13
on the respective lengths
15
and
16
of the carbon fiber or aramid fiber tube forming the strand.
As has been shown in
FIG. 3
, the carbon fiber tube
17
can be provided on a polyamide core
18
which is flexible, as is the tube
17
.
After being cut into lengths, the lengths can be placed in grooved beds
19
of a half barrel mold
20
and the male mold member
21
can be closed thereon. The bed
19
and the ribs
22
of the two mold members can shape the cross section of the resulting underwire so that it is generally oval as shown at
23
. The flattened cross section may lie in the plane of the underwire. To protect the tips, the half barrel mold may be formed with members
24
movable inwardly against the half barrel mold and preventing deformation of the tip under the heat and pressure used to bake the carbon fiber or armed fiber to the desired stiffness. As shown in FIG.
7
,, strands
15
and
16
can be placed in cavities
25
of a double plate mold
26
for the baking process. The resulting underwire
30
has the molded tips
31
and
32
at its ends (
FIG. 6
) and these tips may be provided with thin sewing flanges
33
and
34
of the thermoplastic material from which the tips are molded.
Claims
- 1. A method of making brassiere underwires comprising the steps of:(a) forming a continuous strand of a hardenable material and applying at spaced-apart locations therealong, corresponding to desired lengths of brassiere underwires, pairs of thermoplastic brassiere-underwire tips each surrounding the strand; (b) cutting said strand between the brassiere-underwire tips of each pair to separate said strand into successive lengths each having respective brassiere-underwire tips at extremities thereof; and (c) shaping each of said lengths into a curved underwire shape in a mold and hardening the material of the shaped lengths to form a respective brassiere underwire therefrom preformed with respective brassiere-underwire tips at the extremities thereof.
- 2. The method defined in claim 1 wherein each of said pairs of brassiere-underwire tips have the brassiere-underwire tips thereof interconnected by a web of thermoplastic, said webs being cut away during the cutting of said strand in step (b).
- 3. The method defined in claim 2 wherein said lengths are shaped by placing said lengths on a half-barrel mold and baking said lengths on said half-barrel mold.
- 4. The method defined in claim 2 wherein said lengths are shaped by placing said lengths in cavities of a two-plate mold and baking said lengths in said two-plate molds.
- 5. The method defined in claim 2 wherein said strand is formed as a fiber tube.
- 6. The method defined in claim 5 wherein said tube is a carbon fiber or aramid fiber tube.
- 7. The method defined in claim 6 wherein said tube is formed on a flexible polymeric core.
- 8. The method defined in claim 7 wherein said polymeric core is a polyamide core.
- 9. The method defined in claim 1 wherein said thermoplastic brassiere-underwire tips are injection molded onto said strand.
- 10. The method defined in claim 9 wherein said brassiere-underwire tips are injection molded from a polyamide.
- 11. The method defined in claim 9 wherein brassiere underwire tips of different colors are injection molded onto said strand as a function of distances between said spaced-apart locations, thereby indicating different sizes of said underwires.
- 12. The method defined in claim 2, further comprising forming a sewing flange on at least one of the tips of each pair.
- 13. The method defined in claim 2, further comprising forming a soft zone between each tip and a hardened remainder of a respective length of each underwire.
- 14. The method defined in claim 2 wherein said strand is formed with a circular cross section and in the shaping of said lengths in step (c) the circular cross section is converted into an oval cross section of the respective brassiere underwire.
US Referenced Citations (4)
Foreign Referenced Citations (1)
Number |
Date |
Country |
63-56439 |
Mar 1988 |
JP |