U.S. patent application number 10/706503 was filed with the patent office on 2005-03-31 for filing tool for hardened-skin care and method of manufacturing the same.
This patent application is currently assigned to SHINWOO UNION CO., LTD.. Invention is credited to Park, Il-Yong.
Application Number | 20050066988 10/706503 |
Document ID | / |
Family ID | 34374191 |
Filed Date | 2005-03-31 |
United States Patent
Application |
20050066988 |
Kind Code |
A1 |
Park, Il-Yong |
March 31, 2005 |
Filing tool for hardened-skin care and method of manufacturing the
same
Abstract
Disclosed is a filing tool for hardened-skin care, including a
plurality of filing parts having double plated nickel and stone
powders fixed to such nickel on a metal plate. A method of
manufacturing the filing tool is also provided, including setting a
patterned photosensitive dry film on the metal plate, exposing the
metal plate set with the dry film to light, removing a non-exposed
portion of the dry film to form a masking pattern, plating nickel
on the metal plate formed with the masking pattern to form a first
nickel-plated layer, followed by uniformly applying stone powders
on the first nickel-plated layer, further plating nickel on the
stone powders to form a second nickel-plated layer, and fixing the
stone powders between the first nickel-plated layer and the second
nickel-plated layer, followed by removing the masking pattern.
Thereby, since the stone powders, serving as a filing material, are
securely fixed to nickel, filing efficiencies improve. In addition,
the filing tool has higher strength, due to the use of the metal
plate.
Inventors: |
Park, Il-Yong; (Oryu-dong,
KR) |
Correspondence
Address: |
WEBB ZIESENHEIM LOGSDON ORKIN & HANSON, P.C.
700 KOPPERS BUILDING
436 SEVENTH AVENUE
PITTSBURGH
PA
15219
US
|
Assignee: |
SHINWOO UNION CO., LTD.
|
Family ID: |
34374191 |
Appl. No.: |
10/706503 |
Filed: |
November 12, 2003 |
Current U.S.
Class: |
132/76.4 |
Current CPC
Class: |
A45D 29/04 20130101;
A61B 2017/320008 20130101; A61B 17/54 20130101 |
Class at
Publication: |
132/076.4 |
International
Class: |
A45D 029/18 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 26, 2003 |
KR |
10-2003-0066907 |
Claims
What is claimed is:
1. A filing tool for hardened-skin care, comprising a plurality of
filing parts formed on a metal plate, wherein the filing parts each
include a first nickel-plated layer, a second nickel-plated layer,
and stone powders fixed between the first nickel-plated layer and
the second nickel-plated layer.
2. A method of manufacturing a filing tool for hardened-skin care
comprising a plurality of filing parts formed on a metal plate, the
method comprising: first step of setting a patterned photosensitive
dry film on the metal plate; second step of exposing the metal
plate set with the dry film to light; third step of removing a
non-exposed portion of the dry film to form a masking pattern;
fourth step of plating nickel on the metal plate formed with the
masking pattern to form a first nickel-plated layer, followed by
uniformly applying stone powders on the first nickel-plated layer;
fifth step of further plating nickel on the stone powders to form a
second nickel-plated layer; and sixth step of fixing the stone
powders between the first nickel-plated layer and the second
nickel-plated layer, followed by removing the masking pattern.
3. The method as defined in claim 2, further comprising
ultrasonicating the metal plate formed with the masking pattern to
remove impurities, followed by acid-cleaning the metal plate to
remove an oxidation film of the metal plate and then activating a
surface of the metal plate, between the third step and the fourth
step.
4. The method as defined in claim 2, further comprising
acid-cleaning the metal plate, and then activating a surface of the
metal plate, followed by a nickel-plating process, after the sixth
step.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates, in general, to filing tools
for hardened-skin care and manufacturing methods thereof. More
specifically, the present invention is directed to a filing tool
suitable for use in the care of hardened-skin, including the nail,
the elbow, and the sole of a foot, comprising a plurality of filing
parts arranged on a metal plate, and a method of manufacturing the
same.
[0003] 2. Description of the Related Art
[0004] In general, filing tools for use on fingernails and
hardened-skin have been manufactured by various methods. For
example, the filing tools are obtained by subjecting a metal
surface thereof to a mechanical processing to form fine recesses
and protrusions, or by forming fine protrusions by means of a
chemical corrosion, or by attaching a filing material onto a metal
plate by use of an adhesive.
[0005] However, thusly manufactured filing tools to care for
fingernails and hardened-skin are disadvantageous in that parts of
filed impurities after such a tool is used for predetermined
periods are inserted into the recesses or filing materials or the
attached filing material is separated from the tool, thus
decreasing filing performance.
[0006] In addition, there are proposed techniques for forming a
plurality of perforated holes on a filing surface of the filing
tool to easily remove impurities.
[0007] However, since sufficient strength is required for the
filing tool not to be curved upon filing, the numbers and intervals
of the holes are limitedly formed on the filing surface.
[0008] Thus, limitations are imposed on the removal of impurities,
whereby fingernail care or hardened-skin care can be rough.
[0009] Korean Utility Model No. 20-0253679 discloses a filing tool,
characterized in that removing recesses for removing impurities are
formed on a copper foil of a base via a corrosion process, and the
copper foil, with the exception of corroded portions, is attached
with a filing material, such as white alumina, having high
hardness, mixed in a plating solution via an electroplating
process. Thereby, filing parts having a desired filing performance
by high hardness and roughness are provided, together with removing
recesses capable of directly removing filed impurities.
[0010] However, the above technique is disadvantageous in terms of
low productivity due to complicated processes, including forming
the copper foil on the base, etching the formed copper foil to form
the etched portions to be removing recesses, and fixing white
alumina to the non-etched portions to form filing parts. Further,
since the base is made of a synthetic resin material, it should be
thick to maintain a desired strength.
SUMMARY OF THE INVENTION
[0011] Therefore, it is an object of the present invention to
alleviate problems encountered in the related art and to provide a
filing tool for hardened-skin care, characterized in that a
plurality of filing parts have double plated nickel and stone
powders securely fixed to such nickel on a metal plate, thus
achieving no separation of the stone powders from the metal plate,
high filing efficiency, higher strength due to the use of the metal
plate as a base.
[0012] Another object of the present invention is to provide a
method of manufacturing the filing tool.
[0013] To achieve the above objects, according to a first
embodiment of the present invention, there is provided a filing
tool for hardened-skin care, comprising a plurality of filing parts
formed on a metal plate, wherein the filing parts each include a
first nickel-plated layer, a second nickel-plated layer, and stone
powders fixed between the first and second nickel-plated
layers.
[0014] According to a second embodiment of the present invention,
there is provided a method of manufacturing a filing tool for
hardened-skin care comprising a plurality of filing parts formed on
a metal plate, the method comprising setting a patterned
photosensitive dry film on the metal plate, exposing the metal
plate set with the dry film to light, removing a non-exposed
portion of the dry film to form a masking pattern, plating nickel
on the metal plate formed with the masking pattern to form a first
nickel-plated layer, followed by uniformly applying stone powders
on the first nickel-plated layer, further plating nickel on the
stone powders to form a second nickel-plated layer, and fixing the
stone powders between the first nickel-plated layer and the second
nickel-plated layer, followed by removing the masking pattern.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The above and other objects, features and other advantages
of the present invention will be better understood from the
following detailed description taken in conjunction with the
accompanying drawings, in which:
[0016] FIG. 1 is a perspective view of a filing tool for nail care
according to an embodiment of the present invention;
[0017] FIG. 2 is a cross-sectional view taken along the line A-A of
FIG. 1; and
[0018] FIG. 3 is a perspective view of a filing tool for
hardened-skin care according to another embodiment of the present
invention.
DETAILED DESCRIPTION OF THE INVENTION
[0019] Based on the present invention, a filing tool for
hardened-skin care is obtained by nickel-plating a metal plate
formed with a masking pattern, uniformly dispersing stone powders
over the metal plate, and further nickel-plating the metal plate to
fix the stone powders to a nickel-plated surface. Hence, the filing
tool is advantageous in terms of high filing efficiency due to the
stone powders securely fixed to nickel, and higher strength of the
metal plate than that of conventional synthetic resins. In the
present invention, `hardened-skin` is used as a concept including
not only hardened-skin formed around the heel and sole of a foot,
or the elbow, but also keratinous skin, such as fingernails and
toenails.
[0020] Hereinafter, a detailed description will be given of a
filing tool for hardened-skin care and a method of manufacturing
the same, with reference to the appended drawings.
[0021] FIGS. 1 and 2 show a filing tool for use in hardened-skin
care manufactured by the inventive method. As shown in FIGS. 1 and
2, a plurality of filing parts 12 having predetermined shapes are
arranged on a metal plate 11. Further, respective removing recesses
13, serving to remove dead skin resulting from filing
hardened-skin, are formed between the adjacent filing parts 12. The
filing part 12 includes a first nickel-plated layer 15a and a
second nickel-plated layer 15b, and stone powders 14, in which the
stone powders 14 are fixed between the first and second
nickel-plated layers 15a and 15b on the metal plate.
[0022] Before the setting of a dry film as a first step of the
present invention, the metal plate 11 as a base is previously
subjected to the series of processes of cutting, acid-cleaning and
deburring. Specifically, the metal plate 11 is cut to a
predetermined size for easy work, after which the surface of the
metal plate 11 is acid-cleaned, and then impurities are removed
(deburred) from the metal plate 11.
[0023] In particular, as the metal plate 11, preference is given to
using stainless steel. Also, the variation of the cutting dimension
of the metal plate 11 is maintained in the range of .+-.2 mm. It is
important that stainless steel as a base material is maintained
without scratches after removing a releasing paper from the
stainless steel. In addition, upon the acid-cleaning, the acid used
is preferably hydrochloric acid. With the aim of increasing a
contact force of a photosensitive dry film, a deburring process is
repeatedly performed until the impurities on the metal plate 11 are
completely removed. As such, there should be no moisture on the
metal plate 11.
[0024] Subsequently, a patterned photosensitive dry film is set on
the metal plate 11 (1.sup.st step).
[0025] As the patterned dry film, use is taken of commercially
available ones in the form of films by large companies in Korea and
foreign countries. Such a dry film is roll coated and placed on the
metal plate 11. In such a case, it is noted that the dry film is
flatly positioned thereon in such a way that it does not come off
the metal plate 11 while unfolded. As well, the dry film should not
have impurities. To prevent partial disposition of the patterns of
the dry film, the dry film should be accurately set on the metal
plate 11. Since defective rates increase when the patterned film is
undesirably placed, the setting state of the film should be
confirmed.
[0026] Then, with the aim of forming a pattern, the metal plate 11
united with the patterned photosensitive film is exposed to
chemical radiation (2.sup.nd step).
[0027] The patterned dry film includes an exposed portion
transmitted with chemical radiation, such as ultraviolet light, and
a non-exposed portion that is not transmitted with ultraviolet
light. The exposed portion of the dry film is cured by ultraviolet
light.
[0028] The exposing process is performed under 7-8 kW of
ultraviolet light for 10-12 sec, depending on the kinds and
properties of the photosensitive film. Exposure to ultraviolet
light, according to normal standards provided by manufacturers of
photosensitive films, is understood to those skilled in the
art.
[0029] Thereafter, the non-exposed portion of the dry film is
removed to form a masking pattern on the metal plate 11 (3.sup.rd
step).
[0030] Of the dry film, a portion that is not exposed to
ultraviolet light is present in the state of not cured, and thus
chemically removed by sodium carbonate (Na.sub.2CO.sub.3). The
exposed portion of the dry film in the state of cured remains on
the metal plate 11 to form a predetermined pattern, which is
referred to as a masking pattern.
[0031] The masking pattern-formed portion, that is, the exposed
portion is removed following a nickel-plating process as defined
later, therefore resulting in removing recesses 13 of the filing
tool. Whereas, the portion without the masking pattern, that is,
the non-exposed portion is plated with nickel to form the first and
second nickel-plated layers 15a and 15b, which constitute the
filing part 12.
[0032] Subsequently, the masking pattern-formed metal plate 11 is
plated with nickel and uniformly applied with stone powders 14
(4.sup.th step).
[0033] The first nickel-plated layer 15a is preferably 0.20-0.30
.mu.m thick (nickel strike). If the nickel-plated layer 15a is not
in the above thickness range, a contact force of the nickel strike
decreases. In particular, the layer 15a is less than 0.20 .mu.m,
the stone powders are difficult to securely fix thereon.
[0034] The stone powders 14 should be uniformly dispersed over the
metal plate 11 to form a predetermined distribution. Examples of
the stone powders include white alumina powders, or ultra small
diamond. In cases of the filing tool for nail care, the stone
powders have a particle size of 10-15 .mu.m. Meanwhile, in cases of
the filing tool for hardened-skin care, the stone powders have an
average particle size of 20-25 .mu.m.
[0035] As for nickel-plating, the metal plate 11 obtained from the
3.sup.rd step is immersed in a nickel-plating solution and
electroplated. As such, the stone powders are uniformly dispersed
over the metal plate 11 in the state of being applied with
electricity. Alternatively, the metal plate 11 which is connected
to a negative electrode may be immersed into the nickel-plating
solution containing the stone powders 14, and then electroplated.
In addition, the application of the nickel and the stone powders on
the metal plate may be carried out by various methods so long as an
electroplating process is performed.
[0036] The second nickel-plated layer 15b is further formed on the
stone powders 14 fixed to the first nickel-plated layer 15a on the
metal plate 11 (5.sup.th step).
[0037] To prevent the separation of the stone powders 14 fixed to
the first nickel-plated layer 15a, nickel is further electroplated
on the stone powders 14 for 15-20 min, to form the second
nickel-plated layer 15b having a thickness of 8-10 .mu.m.
[0038] After the stone powders 14 are fixed between the first and
second nickel-plated layers 15a and 15b, the masking pattern is
removed (6.sup.th step).
[0039] The removal (separation) of the masking pattern should be
performed after the nickel-plated layers are sufficiently cured in
such a way that the stone powders are firmly fixed to the
nickel-plated layers. Thereby, the filing parts are less damaged.
Moreover, the masking pattern formed at the 3.sup.rd step, which is
a non-nickel-plated portion, is removed at 6.sup.th step and thus
formed to be the removing recesses 13, serving to remove dead skin
resulting from filing hardened-skin.
[0040] Further, according to another aspect of the present
invention, between the 3.sup.rd step and the 4.sup.th step, the
metal plate formed with the masking pattern is cleaned
ultrasonically, and then acid-cleaned, followed by activating the
surface of the metal plate.
[0041] As such, the ultrasonic-cleaning process is performed to
remove the non-exposed portion of the film unnecessarily remaining
on the metal plate. Preferably, as a component capable of removing
impurities by activating the surface of the metal plate,
commercially available Ferra-BU is used. That is, the metal plate
is ultrasonicated for about 1 min once to remove the
impurities.
[0042] The acid-cleaning process is carried out to remove an
oxidation film of the metal plate. For example, 10% hydrochloric
acid is used for 30 sec (once) to eliminate the oxidation film.
[0043] The activation of the surface of the metal plate is required
to improve a contact force between the metal plate and the nickel.
For example, the surface of stainless steel as the metal plate is
activated for about 1 min in a range of not bubbling using Makpan82
commercially available as a surfactant (S/S activation).
[0044] Furthermore, according to still another aspect of the
present invention, the metal plate subjected to the 6.sup.th step
is acid-cleaned, and the surface thereof is activated, after which
a nickel-plating process is repeated. Thereby, the surface gloss of
the filing tool can be increased.
[0045] Selectively, an additional gloss treatment may be carried
out, or a protective coating film may be formed. In addition,
stains generated during the above processes may be
ultrasonic-cleaned.
[0046] Finally, the metal plate is placed into a dryer and dried at
70-80.degree. C. for 10-15 min, cut to a desired shape, confirmed
for sizes thereof, and subjected to common post-treatment, such as
trimming, so as not to generate burrs, thereby completing the
filing tool of the present invention.
[0047] Thusly manufactured filing tool is attached to a plastic
body as shown in FIG. 3, and used for care of hardened-skin, say,
around the sole and heel of a foot, or the elbow. The filing tool
shown in FIG. 3 is manufactured by attaching the injection-molded
body with the metal plate having the filing parts by use of an
adhesive, or by an insert-injecting process, which is understood to
those skilled in the art.
[0048] As for the filing tool for hardened-skin care, the filing
parts 12 and the removing recesses 13 are variously patterned, and
filing efficiencies are controlled depending on the sizes of the
filing parts 12. Thereby, the filing tool is manufactured in the
form suitable for use in hardened-skin care or nail care.
[0049] Having generally described this invention, a further
understanding can be obtained by reference to specific preparative
examples which are provided herein for the purposes of illustration
only and are not intended to be limiting unless otherwise
specified.
EXAMPLE 1
[0050] A metal plate of stainless steel was cut, from which a
releasing paper for surface protection was separated. Further,
impurities on the surface of the metal plate were removed, and the
surface thereof was cleaned with hydrochloric acid (10%) and then
dried, after which a patterned photosensitive dry film was roll
coated on a whole surface of the metal plate.
[0051] Subsequently, the metal plate set with the patterned
photosensitive dry film having a pattern of filing parts where
circular shapes are repeatedly arranged was exposed to halogen lamp
(8 kW) for 11 sec.
[0052] Thereby, the photosensitive dry film was irradiated with
ultraviolet light, and a portion transmitted with ultraviolet light
(transparent portion in the dry film) was cured. The non-cured
portion in the dry film was removed with sodium carbonate
(Na.sub.2CO.sub.3) and developed, thus forming a desired masking
pattern.
[0053] The metal plate formed with the masking pattern was immersed
into a nickel-plating solution and electroplated, to form a first
nickel-plated layer having a thickness of 0.25 .mu.m, on which
powders of white alumina having an average particle size of 20
.mu.m were dispersed. Thereafter, a second nickel-plated layer
being 9 .mu.m thick was further formed on the white alumina
powders, after which it was completely cured. Hence, the white
alumina powders were firmly fixed between the first and second
nickel-plated layers, and then the masking pattern was removed.
[0054] Thusly obtained product was ground to increase gloss and cut
according to product standards, and subjected to common
post-treatment, such as trimming, to manufacture a desired filing
tool for hardened-skin care.
EXAMPLE 2
[0055] A filing tool for hardened-skin care was manufactured in the
same manner as in Example 1, with the exception that 10% Ferra-BU
was used for ultrasonic cleaning for 1 min after the masking
pattern had been formed, and 10% hydrochloric acid was used for 30
sec to remove an oxidation film of the metal-plate, and Makpan82
was applied for 1 min to increase a contact force of the metal
plate, followed by a nickel-plating process.
[0056] As described above, the present invention provides a filing
tool for hardened-skin care and a manufacturing method thereof. The
filing tool of the present invention has a plurality of filing
parts in which stone powders are securely fixed between a first
nickel-plated layer and a second nickel-plated layer on a masking
pattern-formed metal plate. Thereby, since such stone powders,
serving as a filing material, are not separated from the metal
plate, filing efficiencies improve. In addition, the filing tool is
advantageous in terms of high strength due to the use of the metal
plate as a base.
[0057] The present invention has been described in an illustrative
manner, and it should be understood that the terminology used is
intended to be in the nature of description rather than of
limitations. Many modifications and variations of the present
invention are possible in light of the above teachings. Therefore,
it should be understood that within the scope of the appended
claims, the invention may be practiced otherwise than as
specifically described.
* * * * *