U.S. patent application number 14/723235 was filed with the patent office on 2015-12-03 for titanium-based alloys and articles formed from such alloys.
The applicant listed for this patent is Frederick Goldman, Inc.. Invention is credited to Andrew Derrig.
Application Number | 20150344993 14/723235 |
Document ID | / |
Family ID | 54700046 |
Filed Date | 2015-12-03 |
United States Patent
Application |
20150344993 |
Kind Code |
A1 |
Derrig; Andrew |
December 3, 2015 |
TITANIUM-BASED ALLOYS AND ARTICLES FORMED FROM SUCH ALLOYS
Abstract
Article(s) are disclosed that are formed, at least in part, by a
titanium-based alloy having about 35 to about 55 wt. % or greater
titanium, the article(s) have a hardness of about 1350 HV or
greater, and a coloration characterized by an L value of about
56.00 to about 60.00, an a value of about 1.0 to about 1.5, and a b
value of about 3.65 to about 3.75, wherein the L, a, and b values
are color values according to the CIE L*a*b* color scale.
Inventors: |
Derrig; Andrew; (Lynbrook,
NY) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Frederick Goldman, Inc. |
New York |
NY |
US |
|
|
Family ID: |
54700046 |
Appl. No.: |
14/723235 |
Filed: |
May 27, 2015 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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62003514 |
May 27, 2014 |
|
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|
Current U.S.
Class: |
63/15 ; 420/417;
420/421; 420/430; 420/431; 420/587 |
Current CPC
Class: |
A44C 9/00 20130101; C22C
27/04 20130101; G04B 37/22 20130101; C22C 30/02 20130101; C22C
14/00 20130101; A44C 27/003 20130101 |
International
Class: |
C22C 14/00 20060101
C22C014/00; C22C 27/04 20060101 C22C027/04; C22C 30/02 20060101
C22C030/02; A44C 9/00 20060101 A44C009/00 |
Claims
1. An article comprising a titanium-based alloy having about 35 to
about 55 wt. % titanium, the article having a hardness of about
1350 HV or greater, and a coloration characterized by an L value of
about 56.00 to about 60.00, an a value of about 1.0 to about 1.5,
and a b value of about 3.65 to about 3.75, wherein the L, a, and b
values are color values according to the CIE L*a*b* color
scale.
2. The article of claim 1, wherein the article has a density of
about 6.0 to about 6.35 g/cm.sup.3.
3. The article of claim 1, wherein the alloy has about 45 wt. %
Ti.
4. The article of claim 1, wherein the alloy has no more than about
60 wt. % W.
5. The article of claim 1, wherein the alloy has about 10 to about
60 wt. % W.
6. The article of claim 1, wherein the alloy has about 5 to about
15 wt. % C.
7. The article of claim 1, wherein the alloy has about 12.7 wt. %
C.
8. The article of claim 1, wherein the alloy comprises no more than
about 10 wt. % Cr.
9. The article of claim 1, wherein the alloy comprises about 0.001
to about 10 wt. % Cr.
10. The article of claim 1, wherein the alloy comprises about 0.001
to about 10 wt. % Mo.
11. The article of claim 1, wherein the alloy comprises about 6.5
wt. % or greater Mo.
12. The article of claim 1, wherein the alloy comprises about 0.5
to about 1.75 wt. % Cu.
13. The article of claim 1, wherein the alloy comprises no more
than trace amounts of Co and Fe.
14. The article of claim 1, wherein the alloy comprises: Ti: about
35 to about 55 wt. %; W: about 10 to about 60 wt. %; Ni: about 5 to
about 20 wt. %; Cr: about 0.001 to about 10 wt. %; C: about 5 to
about 15 wt. %; Mo: about 0.001 to about 10 wt. %; and Cu: about
0.5 to about 1.75 wt. %.
15. The article of claim 1, wherein the remainder of the alloy
composition comprises one or more of: Si, Ta, Al, Mn, Nb, Zr and
O.
16. The article of claim 1, wherein the article is an item of
jewelry.
17. The article of claim 16, wherein the item of jewelry is a ring,
a pendant, a dog tag, a hairclip, a chain, a watchcase, a pin, a
bracelet, a necklace, an earring or a charm.
18. The article of claim 16, wherein the item of jewelry is a
finger ring.
19. The article of claim 16, further comprising at least one of a
precious metal, a stone, a gemstone, a crystal, or another material
suitable for use in jewelry affixed to the article.
20. The article of claim 18, wherein the finger ring has at least
one depression that extends into, and at least substantially around
the circumference of, an outer surface of the finger ring, wherein
the depression is substantially filled with a material.
21. The article of claim 20, wherein the material is a metal.
22. The article of claim 21, wherein the metal is a precious metal.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] The present application claims the benefit of U.S.
Provisional Application Ser. No. 62/003,514 filed 27 May 2014,
which is incorporated herein by reference in its entirety
BACKGROUND
[0002] The present application generally relates to compositions of
matter and articles of manufacture, such as jewelry items.
[0003] In this specification where a document, act or item of
knowledge is referred to or discussed, this reference or discussion
is not an admission that the document, act or item of knowledge or
any combination thereof was at the priority date, publicly
available, known to the public, part of common general knowledge,
or otherwise constitutes prior art under the applicable statutory
provisions; or is known to be relevant to an attempt to solve any
problem with which this specification is concerned.
[0004] Jewelry such as finger rings, pendants, bracelets, and
necklaces have traditionally been made of soft metals such as gold,
silver and platinum because those metals are malleable, and easily
formed by casting, forging and molding. Recently, jewelry items
have been formed from harder materials such as alloys or composites
such as "cermets." An alloy is a mixture or metallic solid solution
composed of two or more elements. A cermet is a composite material
composed of a ceramic and metallic material. Typically, a metal is
used as a binder for an oxide, boride, nitride, or carbide.
[0005] Some specific attempts to form jewelry from these types of
materials include alloys or composites having titanium, zirconium
(U.S. Pat. No. 3,669,695), titanium-niobium-zirconium (U.S. Pat.
No. 6,759,134) and tungsten carbide (U.S. Pat. Nos. 6,553,667;
6,990,736; 6,993,842; 7,032,314; 7,076,972). Such jewelry is much
more resistant to scratching and other damage than traditional
jewelry made of softer metals. Additionally, certain alloys
containing these metals, prepared under certain conditions, have an
attractive dark grey or black color. See, e.g., U.S. Pat. No.
6,759,134, describing articles made from an alloy of 51-70
weight-percent (wt %) titanium, 3-17% niobium, and the balance
zirconium, tantalum, molybdenum, hafnium zirconium, chromium, or
mixtures thereof, having a black surface layer of a niobium
oxide.
[0006] Additional alloy and composite formulations providing
desirable jewelry characteristics would be advantageous. The
articles provided herewith address that need. In particular,
conventional jewelry materials can possess one or more of the
following deficiencies and/or disadvantages:
[0007] traditional formulations can be too heavy;
[0008] traditional formulations may not possess an optimal
aesthetic coloration and/or shine or luster; and [0009] traditional
formulations may lack sufficient hardness.
[0010] While certain aspects of conventional technologies have been
discussed to facilitate disclosure of the invention, Applicants in
no way disclaim these technical aspects, and it is contemplated
that the claimed invention may encompass or include one or more of
the conventional technical aspects discussed herein.
SUMMARY
[0011] It has been discovered that articles made from certain
titanium-based alloys, such as, for example, alloys having about
35% to about 55% Ti, among other constituents, which will be
described in further detail herein, advantageously, according to
certain embodiments, possess a unique combination of desirable
features. For example, alloys formed according to the principles of
the present invention possess desirable coloration, hardness and
density properties which makes them particularly attractive for use
in forming certain articles, such as articles of jewelry.
[0012] Thus, according to one aspect of the present invention,
there is provided an article comprising a titanium-based alloy
having about 35 wt. % to about 55 wt. % titanium, the article
having a hardness of about 1300 HV or greater, and a coloration
characterized by an "L" value of about 56 to about 60, an "a" value
of about 1.0 to about 1.5, and a "b" value of about 3.7 to about
3.8, wherein the L, a, and b values are color values according to
the CIE L*a*b* color scale.
[0013] An article formed according to the principles of the present
invention may further possess a density of about 6.0 to about 6.35
g/cm3.
[0014] The remainder of the alloy composition may have one or more
of: Si, Ta, Al, Mn, Nb, Zr and O.
[0015] The article of can be in the form of an item of jewelry.
[0016] The article may be in the form of a ring, a pendant, a dog
tag, a hairclip, a chain, a watchcase, a pin, a bracelet, a
necklace, an earring or a charm.
[0017] The article may be in the form of a finger ring.
[0018] The article may include at least one of a precious metal, a
stone, a gemstone, a crystal, or another material suitable for use
in jewelry affixed to the article.
[0019] The article may be in the form of a finger ring, and my have
at least one depression that extends into, and at least
substantially around the circumference of, an outer surface of the
finger ring, wherein the depression is substantially filled with a
material, such as metal, or a precious metal.
[0020] The present invention may address one or more of the
problems and deficiencies of the prior art discussed above.
However, it is contemplated that the invention may prove useful in
addressing other problems and deficiencies, or provide benefits and
advantages, in a number of technical areas. Therefore the claimed
invention should not necessarily be construed as being limited to
addressing any of the particular problems or deficiencies discussed
herein.
BRIEF DESCRIPTION OF THE DRAWINGS
[0021] FIG. 1 is a perspective view of a plain band-like finger
ring in accordance with an illustrative embodiment.
[0022] FIGS. 2A-2B are perspective views of finger rings that were
machined in accordance with an alternate illustrative
embodiments.
[0023] FIG. 3 is a view of a finger ring that has been decoratively
machined in accordance with another alternate illustrative
embodiment.
[0024] FIG. 4 is a view of a finger ring with a diamond inset.
DETAILED DESCRIPTION
[0025] As used herein, the singular forms "a", "an" and "the" are
intended to include the plural forms as well, unless the context
clearly indicates otherwise. Additionally, the use of "or" is
intended to include "and/or", unless the context clearly indicates
otherwise.
[0026] As used herein, "about" is a term of approximation and is
intended to include minor variations in the literally stated
amounts, as would be understood by those skilled in the art. Such
variations include, for example, standard deviations associated
with techniques commonly used to measure the amounts of the
constituent elements or components of an alloy or composite
material.
[0027] All of the numerical values contained in this disclosure are
to be construed as being characterized by the above-described
modifier "about," are also intended to include the exact numerical
values disclosed herein. Moreover, all ranges include the upper and
lower limits.
[0028] All percentages disclosed herein refer to percent by weight,
relative to the overall weight of the composition, unless otherwise
described herein. The weight percentages disclosed herein were
measured by an Inductively Coupled Mass Spectrometry ("ICP-MS").
ICP-MS is a type of mass spectrometry capable of accurately
measuring metals and non-metals at very low concentrations. The
sample is ionized by inductively coupled plasma and then the ions
are separated and quantified by a mass spectrometer. This technique
is familiar to those skilled in the art.
[0029] The "HV" hardness number values described herein refer to
the hardness value measured according to the Vickers hardness test,
performed according to the ASTM:E384-11.sup..epsilon.1 standard
(last revised March 2012).
[0030] As used herein, "L," "a," and "b," refer to the color values
measured according to the CIE 1976 (L*, a*, b*) color space (or
CIELAB) scale. These values disclosed herein were measured by a
Konica Minolta Spectrophotometer model CM-600.
[0031] All of the stated compositions and methods disclosed herein
are to be construed as "comprising," "consisting essentially of,"
and "consisting of" the stated constituents and method steps.
[0032] Articles formed according to the principles of the present
invention are formed, at least in part, from a particular alloy
composition. According to certain embodiments, the alloy
composition is titanium-based. According to further embodiments,
the alloy composition further includes, in addition to titanium,
one or more of tungsten, nickel, chromium, carbon, molybdenum
and/or copper.
[0033] According to further alternative embodiments, the alloy
composition is selected from a combination of one or more, or all,
elements listed in the table below, in any of the amounts described
in the Table.
TABLE-US-00001 TABLE 1 Relative amounts in wt. %, modified in all
cases Consituent by the term "about" Ti 5-55, 35-55, 45, or 45.5 W
no more than 60, 10-60, or 20 C 1-10, 8-20, 5-15, 10 or greater, or
12.7 or greater Cr .001-10, 0-5, 2 or less, 1 or less, or 1.02 Mo
.001-10, 1-10, 3-10, or 6.5 or greater Cu .001-3.0, 0.5-2.0,
0.5-1.75, or trace Ni 5-25, 5-20, or 11
[0034] With respect to Ti, the alloy composition may include about
35-55 wt. % of Ti. Amounts of Ti below this threshold are not
preferred because depending on which materials are used to replace
Ti, the weight of the composition could increase, the hardness of
the composition could decrease, the coloration may be modified in
an unfavorable manner, and less than optimal or unfavored optical
properties such as reflectivity, and other undesired changes to the
composition may result. Compositions that include Ti in amounts
beyond the upper limit of this range are not preferred because,
depending on which materials replace Ti in the composition, the
alloy could exhibit increased brittleness, undesirable modification
coloration, reduced machine ability, and unfavorable changes in
optical properties such as reflectivity, and/or other undesired
changes to the properties of composition.
[0035] With respect to W, the alloy composition may include no more
than about 60 wt. % W. According to further embodiments, the alloy
contains no more than about 20% wt. % W. According to further
optional embodiments, the alloy composition includes at least about
10 wt. % W.
[0036] With respect to Ni, the alloy composition may include about
5 to about 20 wt. % Ni. Compositions that include Ni in amounts
below the minimum value of this range are not preferred because
such compositions tend to exhibit increased hardness of the solid
solution elements, and resulting increases in brittleness.
Compositions that include Ni in amounts above the maximum value of
this range are not preferred because such compositions exhibit a
decrease in hardness of the alloy which in turn will decrease the
hardness, where resistance, corrosion resistance, as well as
increase the risk of allergic reaction based on the EN1811/2011
standard.
[0037] With respect to Cr, the alloy composition may include no
more than about 2 wt. % Cr. Amounts of Cr above this level are not
preferred because such compositions exhibit undesired changes in
coloration, optical properties such as reflectivity, hardness, and
ductility. According to further optional embodiments, the alloy
composition includes about 0 to about 5 wt. % Cr. Compositions that
include Cr in amounts below the lower limit of this range are not
preferred because such compositions exhibit undesirable changes in
coloration, optical properties such as reflectivity, hardness, and
ductility.
[0038] Carbon exists in the composition in the form of a carbide
with W and Ti in solid solution. With respect to C, the alloy
composition may include about 10 wt. % or greater C. Amounts of C
below this threshold are not preferred because enough carbon should
be present such that it can form carbides with W and Ti in solid
solution. According to further optional embodiments, the alloy
composition includes about 8 to about 20 wt. % C. Compositions that
include C in amounts beyond the upper limit of this range are not
preferred because compositions having carbon in such amounts form
excess carbides which in turn result in increased brittleness of
sintered parts and cause unwanted binding or carbonization with
other free elements.
[0039] With respect to Mo, the alloy composition may include about
6.5 wt. % or greater Mo. Amounts of Mo below this threshold are not
preferred because unfavorable changes in ductility, coloration and
reflectivity of the composition may result. According to further
optional embodiments, the alloy composition includes about 3 to
about 10 wt. % Mo. Compositions that include Mo in amounts beyond
the upper limit of this range are not preferred because substantial
changes in ductility, coloration, composition and reflectivity may
occur. As an example, a substantial increase in ductility will make
the finished parts, such as parts in the form of a finger ring,
difficult to remove by breaking in a vice in the event of an
emergency, thus necessitating the use of more dangerous and less
favorable means (e.g., wet cutting using a circular diamond
grinding wheel) in order to break the ring and remove it from the
finger if necessary.
[0040] With respect to Cu, the alloy composition may include about
0.5 to about 2.0 wt. % Cu. Compositions that include Cu in amounts
below the minimum value of this range are not preferred because
property such as ductility, fusion temperature and coloration may
be impacted in an adverse manner. Compositions that include Cu in
amounts above the maximum value of this range are not preferred
because such compositions increase the potential peroxidation
breakdown of the metal matrix, thereby decreasing the where
resistance and lifespan of finished articles such as jewelry
pieces.
[0041] Alloy compositions formed according to the principles of the
present invention may include, in addition to the above-described
elements, one or more of the following constituent elements, in
relatively minor amounts: Si, Ta, Al, Mn, Nb, Zr, and/or O.
[0042] Alloy compositions formed according to further embodiments
of the present invention preferably do not include cobalt (Co) or
iron (Fe). More specifically, neither Co nor Fe are intentionally
added as constituent components of the alloy composition. However,
trace amounts of these elements may be found in compositions formed
according to the present invention. For example, modern steelmaking
techniques utilizing commercially available starting materials may
introduce trace amounts of these elements into the composition
unintentionally.
[0043] According to one specific exemplary, and non-limiting
embodiment, an article formed from an alloy according to the
principles of the present invention possesses the following:
TABLE-US-00002 TABLE 2 Value/Weight Property/Constituent Percent HV
(Hardness) 1350 Titanium (Ti) 45.5% Tungsten (W) 20.1% Nickel (Ni)
10.8% Chromium (Cr) 1.0% Cobalt (Co) 0.0% Carbon (C) 12.8% Iron
(Fe) 0.0% Molybdenum (Mo) 6.6% Copper (Cu) 1.5% Silicon (Si) 0.09%
Tantalum (Ta) 0.04% Aluminum (Al) 0.21% Manganese (Mn) 0.01%
Niobium (Nb) 0.01% Zirconium (Zr) 0.01% Oxygen (O) 0.20%
[0044] In some embodiments, the entire article is made from the
alloy. In other embodiments, only a portion of the article is made
from the alloy. For example, the decorative portion of a pin can be
made from the alloy and the rest of the pin can be made from
standard materials. Where the article is a finger ring, the alloy
can comprise the majority of the ring, except for an inlaid
gemstone, or an inlay in an annular groove formed in the alloy,
e.g., as illustrated in relation to rings made from tungsten
carbide in U.S. Pat. No. 7,076,972. Those rings have at least one
depression that extends into, and at least substantially around the
circumference of, an outer surface of the finger ring. In some
embodiments, the depression in those rings is substantially filled
with a precious metal.
[0045] In additional embodiments, the alloy can comprise a minority
of the article, for example as a portion of a sculpture primarily
made of other materials, or as a contrasting band in a ring made
primarily from another metal such as gold or silver.
[0046] In some embodiments, the article is a decorative or artistic
item, for example, a sculpture, a portion of a picture frame, a
paperweight, a portion of a piece of furniture (e.g., an inlay), or
jewelry. Nonlimiting examples of jewelry that can be made from the
Ti-based alloy are rings (e.g., finger rings, toe rings, nose
rings), pendants, tags, dog tags, hairclips, chains, watchcases,
pins, bracelets, anklets, necklaces, earrings and charms.
[0047] The item of jewelry comprising the alloy can further
comprise any other material used in jewelry affixed or integrated
into the item. Examples include a precious metal (e.g., gold,
silver, platinum) either as part of the alloy or affixed to the
item, a stone, a gemstone, a crystal, or any other material
suitable for use in jewelry affixed to the item.
[0048] In particular embodiments, the item of jewelry is a finger
ring. The ring can be made entirely of the alloy, or the ring can
further comprise other materials, for example an inlaid gemstone,
or an inlay in an annular groove formed in the alloy. Illustrative
examples of finger rings are provided in FIGS. 1-4. FIG. 1 shows a
plain band-like ring made from the Ti-based alloy described herein.
FIGS. 2A-2B show other examples of finger rings made from the
Ti-based alloy. These rings were machined after preparation. FIG. 3
shows an additional example of a finger ring made from the Ti-based
alloy that has a decorative pattern machined therein. FIG. 4
illustrates a ring having a diamond set therein as a further
example of a finger ring made from the Ti-based alloy.
[0049] The articles provided here can be made by any method known.
In some embodiments, an ingot, bar, sheet or other form of the
alloy is provided, followed by cutting, shaping and polishing the
ingot or bar to form a piece having a desired shape, then
optionally polishing the piece with a finish polish.
[0050] A "blank" of the article can then be cut from the bar or
sheet, for example using wire electric discharge machining (EDM).
Any internal areas that need to be hollowed out of the blank (e.g.,
the center portion of a ring) can be removed, e.g., using a sink
EDM. A CNC lathe can then be used to prepare the outer shape of the
article, followed by polishing. At this point, any inlays, setting
or engraving can be performed. Where the article is a ring or
similar article that requires internal sizing, a CNC lathe,
followed by an inner polish can be used at this point.
[0051] After the above shaping of the article, the article can be
subjected to one or more heat treatment(s), followed by final
polishing followed and any additional engraving desired, for
example using a CNC lathe or CNC engraving.
[0052] Alternatively, articles having any of the compositions
described herein can be formed by a powder metallurgy process,
wherein the above-described constituent components are blended in
powder form, then pressed or injected to form a blank. The
constituents described herein may be provided in their elemental
powdered form. Alternatively, the powders may themselves be
combinations of different metals or constituent components. The
blank may approximate the final shape or form of the article. This
is often referred to as "near-net-shape." The blank can them be
consolidated by sintering. The result of the sintering is a dense
object possessing the desired coloration, etc. One non-limiting
example of a possible powder metallurgy based formation technique
is Hot Isostatic Pressing (HIP).
[0053] An article, such as any of the articles of jewelry described
herein, formed at least in part from cermet can be produced by any
suitable technique that results in a dense object having the
desired physical properties as well as the desired coloration. For
example, suitable methods may comprise combining the constituent
elements in powder form, pressing or injecting the powders to form
a blank or near net-shape object, and sintering to consolidate the
blank or object and provide a grey/dark grey/black appearance.
Examples of specific techniques for pressing, injecting, molding
and sintering to form a final article, such as an article of
jewelry, have been previously described above in connection with
powder metallurgical techniques. These techniques can also be used
to form articles, such as articles of jewelry, and are incorporated
herein by reference. For example, the methods or techniques
described in the United States Patent Application Publication No.
US 2012-0304694 may be used, the content of which is incorporated
herein by reference in its entirety.
[0054] Articles formed according to the principles of the present
invention, including the articles of jewelry described herein, may
have one or more advantageous properties and/or
characteristics.
[0055] According to certain embodiments, articles formed according
to the principles of the present invention possess a Vickers
hardness number (HV) of about 900 HV, 1200 HV, 1300 HV or greater.
according to one specific, illustrative, and non-limiting example,
an article formed according to the principles of the present
invention possesses an HV value of about 1350 HV, or greater than
1350 HV.
[0056] According to additional embodiments of the present
invention, an article formed according to the principles of the
present invention possesses a coloration characterized by a range
of L, a, and b values. More specifically, articles formed according
to the principles of the present invention possess a "L" value of
about 57 to about 59. According to further embodiments, the
articles further possess an "a" value of about 1.0 to about 1.5.
According to additional embodiments, the articles further possess a
"b" value of about 3.7 to about 3.8. According to one illustrative,
non-limiting example, an article formed according to the principles
of the present invention possesses a coloration characterized as:
L=about 58.01, a=about 1.08, and b=about 3.74.
[0057] According to still other embodiments of the present
invention, articles can be formed which possess a favorable density
property. More specifically, articles formed according to the
principles of the present invention may possess density values of
about 6.0 to about 6.35 g/cm.sup.3. According to one specific,
illustrative, and non-limiting example, an article formed according
to the principle the present invention possesses a density value of
about 6.2 g/cm.sup.3.
[0058] When compositions formed according to the principles of the
present invention are utilized to produce articles of jewelry to be
worn on the body, another important property is the ability of such
articles formed thereby to be removed from the body in the event of
an emergency. Thus, the compositions formulated according to the
principles of the present invention have been designed to serve the
need of a lightweight scratch resistant product, yet still have the
ability to be removed by conventional techniques involving applying
pressure to the article jewelry in a vice-like handheld or
stationary tool. Alternatively, a welding laser can be used to
weaken the structure of the article jewelry. When such a welding
laser is used, cool and should be used in conjunction with a
moderately applied laser contact. Once the surface of the ring has
been compromised, it can be more easily fractured and removed.
Appropriate settings for such an industrial welding laser may
include: voltage (220 V-240 V), cycle (5-5.5 Hz), and application
time (3.25-3.5 milliseconds).
[0059] A similar consideration of the composition when utilized to
produce finished articles in the form of jewelry is the ease in
which the material can be engraved or removed for decorative
purposes. Accordingly, the compositions formulated according to the
principles of the present invention have been designed so as to
facilitate laser engraving of decorative patterns thereon, and the
like. Appropriate laser settings can be determined by those skilled
in the art. According to certain illustrative and nonlimiting
examples, appropriate laser settings may include: power (19.8 W),
cycle speed (7000 Hz), rotation speed (100 mm/s). A desirable depth
of cut can be achieved to render an aesthetically pleasing
design.
[0060] Other embodiments within the scope of the claims herein will
be apparent to one skilled in the art from consideration of the
specification or practice of the invention as disclosed herein. It
is intended that the specification be considered exemplary only,
with the scope and spirit of the invention being indicated by the
claims.
[0061] In view of the above, it will be seen that the several
advantages of the invention are achieved and other advantages
attained.
[0062] As various changes could be made in the above methods and
compositions without departing from the scope of the invention, it
is intended that all matter contained in the above description
shall be interpreted as illustrative and not in a limiting
sense.
[0063] All references cited in this specification are hereby
incorporated by reference. The discussion of the references herein
is intended merely to summarize the assertions made by the authors
and no admission is made that any reference constitutes prior art.
Applicants reserve the right to challenge the accuracy and
pertinence of the cited references.
[0064] Any numbers expressing quantities of ingredients,
constituents, reaction conditions, and so forth used in the
specification are to be understood as being modified in all
instances by the term "about." Notwithstanding that the numerical
ranges and parameters setting forth, the broad scope of the subject
matter presented herein are approximations, the numerical values
set forth are indicated as precisely as possible. Any numerical
value, however, may inherently contain certain errors or
inaccuracies as evident from the standard deviation found in their
respective measurement techniques. None of the features recited
herein should be interpreted as invoking 35 U.S.C. .sctn.112, 6,
unless the term "means" is explicitly used.
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