U.S. patent application number 14/491672 was filed with the patent office on 2015-04-02 for adjustable mattress topper.
The applicant listed for this patent is Feng CHEN, Guozhong NI, Steven James Romero. Invention is credited to Feng CHEN, Guozhong NI, Steven James Romero.
Application Number | 20150089747 14/491672 |
Document ID | / |
Family ID | 52738656 |
Filed Date | 2015-04-02 |
United States Patent
Application |
20150089747 |
Kind Code |
A1 |
NI; Guozhong ; et
al. |
April 2, 2015 |
ADJUSTABLE MATTRESS TOPPER
Abstract
An adjustable body support system for accommodating the needed
or desired support of multiple users. The system comprises an
enclosure for housing a first support member and a second support
member in respective first and second chambers. The first support
member has a first foam layer secured to a second foam layer,
wherein the first and second foam layers have different support
characteristics. The second support member has a third foam layer
secured to a fourth foam layer, wherein the third and fourth foam
layers have different support characteristics. The first and second
support members are removable from and securable in the first and
second chambers, respectively.
Inventors: |
NI; Guozhong; (Dongguan
City, CN) ; CHEN; Feng; (Katy, TX) ; Romero;
Steven James; (Houston, TX) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
NI; Guozhong
CHEN; Feng
Romero; Steven James |
Dongguan City
Katy
Houston |
TX
TX |
CN
US
US |
|
|
Family ID: |
52738656 |
Appl. No.: |
14/491672 |
Filed: |
September 19, 2014 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
62036216 |
Aug 12, 2014 |
|
|
|
61880258 |
Sep 20, 2013 |
|
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Current U.S.
Class: |
5/691 ; 427/202;
427/244 |
Current CPC
Class: |
A47C 27/15 20130101;
A47C 27/002 20130101; A47C 27/088 20130101; A47C 27/085 20130101;
A47C 27/148 20130101 |
Class at
Publication: |
5/691 ; 427/244;
427/202 |
International
Class: |
A47C 27/15 20060101
A47C027/15; A47C 27/08 20060101 A47C027/08; A47C 27/14 20060101
A47C027/14; A47C 27/00 20060101 A47C027/00 |
Claims
1. A body support system, comprising: an enclosure having a first
chamber and a second chamber; a first support member having a first
foam layer secured to a second foam layer, wherein the first and
second foam layers have different support characteristics; and a
second support member having a third foam layer secured to a fourth
foam layer, wherein the third and fourth foam layers have different
support characteristics, and wherein the first and second support
members are removable from and securable in the first and second
chambers, respectively.
2. The system of claim 1, wherein the support characteristics
include at least one of density, indention load deflection, thermal
conductivity, firmness, softness, and material type.
3. The system of claim 1, wherein the first foam layer includes an
indention load deflection rating that is about 2-3 lbs greater than
an indention load deflection rating of the second foam layer.
4. The system of claim 1, wherein the third foam layer includes an
indention load deflection rating that is about 2-3 lbs greater than
an indention load deflection rating of the fourth foam layer.
5. The system of claim 1, wherein one of the foam layers of the
first and second support members includes a gel-infused foam layer,
and wherein the other one of the foam layers of the first and
second support members includes a non-gel-infused foam layer.
6. The system of claim 1, wherein one of the foam layers of the
first and second support members is softer than the other one of
the foam layers of the first and second support members.
7. The system of claim 1, wherein one of the foam layers of the
first and second support members is firmer than the other one of
the foam layers of the first and second support members.
8. The system of claim 1, wherein the first and second support
members are disposed in the enclosure such that the first foam
layer and the third foam layer jointly form a substantially
continuous upper support surface, and wherein the first foam layer
has different support characteristics than the third foam
layer.
9. The system of claim 1, wherein one of the foam layers includes a
gel disposed on a top surface.
10. The system of claim 9, wherein the gel is applied on the top
surface in liquid form.
11. The system of claim 10, wherein the gel is applied using a
brush or a spray device.
12. A body support system comprising: a foam layer; and a gel layer
disposed on the foam layer, wherein the gel layer is applied in
liquid form and allowed to cure on the foam layer.
13. The system of claim 12, wherein the foam layer comprises a
polyurethane foam having viscoelastic properties.
14. The system of claim 12, wherein the gel layer comprises a
polyurethane gel.
15. The system of claim 12, wherein the gel layer has a height of
about 0.004 inches to about 0.5 inches.
16. A method for forming a foam apparatus, comprising: forming a
plurality of holes in a foam layer; depositing a layer of liquid
gel on a surface of the foam layer; and curing the layer of liquid
gel to form a layer of solid gel.
17. The method of claim 16, further comprising repeating the
depositing step and the curing step until a total height of the
layer of solid gel reaches a predetermined height.
18. The method of claim 16, further comprising applying a powder on
a top surface of the layer of solid gel.
19. The method of claim 16, wherein the plurality of holes are
through holes.
20. The method of claim 16, wherein the layer of liquid gel is
cured at room temperature.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims benefit of U.S. Provisional Patent
Application Ser. Nos. 61/880,258 (SINO0007USL), filed Sep. 20,
2013, and 62/036,216 (SINO0007USL02), filed Aug. 12, 2014, which
are herein incorporated by reference.
BACKGROUND
[0002] 1. Field
[0003] Embodiments described herein relate to body support products
formed from foam materials. In particular, embodiments described
herein relate to an adjustable, foam-based mattress topper and
methods for forming such mattress topper.
[0004] 2. Description of the Related Art
[0005] Conventional body supports can be found in a wide variety of
shapes and sizes, and are often adapted for supporting one or more
parts of a user's body. Examples of body supports include
mattresses, pillows, and other cushion-type products. Many body
supports are generally constructed out of foam materials, such as
polyurethane foam. The foam materials may include visco-elastic
properties, such foam materials being known in the art as "memory
foam," which provides the body support with an increased ability to
conform to a user and thereby distribute the weight of the
user.
[0006] Although there are a multitude of foam materials that
exhibit specific properties and different degrees of support, e.g.
some foam materials being soft and others firm, many body supports
are constructed entirely out of a single foam material. A single
conventional body support product is thus not adjustable for use by
multiple users who have a different needed or desired amount or
quality of support. Based on the limitations of existing products
and the high consumer demand for body supports, there is a
continuous need for new and improved adjustable body support type
products and for methods for forming such adjustable body support
type products.
SUMMARY
[0007] Embodiments described herein include a body support system
comprising a housing having a first chamber and a second chamber, a
first support member having a first foam layer secured to a second
foam layer. The first and second foam layers have different support
characteristics. The body support system further comprises a second
support member having a third foam layer secured to a fourth foam
layer, and the third and fourth foam layers have different support
characteristics. The first and second support members are removable
from and securable in the first and second chambers,
respectively.
[0008] In another embodiment, a body support system includes a foam
layer; and a gel layer disposed on the foam layer, wherein the gel
layer is applied in liquid form and allowed to cure on the foam
layer.
[0009] In another embodiment, a method for forming a foam apparatus
includes forming a plurality of holes in a foam layer, depositing a
layer of liquid gel on a surface of the foam layer, and curing the
layer of liquid gel to form a layer of solid gel on the foam
layer.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] So that the manner in which the above recited features can
be understood in detail, a more particular description of the
disclosure, briefly summarized above, may be had by reference to
embodiments, some of which are illustrated in the appended
drawings. It is to be noted, however, that the appended drawings
illustrate only typical embodiments and are therefore not to be
considered limiting of its scope, for the disclosure may admit to
other equally effective embodiments.
[0011] FIG. 1 illustrates a body support system according to one
embodiment.
[0012] FIG. 2 illustrates a side view of an embodiment of a foam
layer having a gel layer disposed thereon according to one
embodiment.
[0013] FIG. 3 illustrates a process flow chart showing a method for
forming a layer of solid gel on the foam layer according to one
embodiment.
[0014] FIG. 4 is a top view of an embodiment of a foam layer having
holes formed therein.
[0015] FIG. 5 is a top view of another embodiment of a foam layer
having holes formed therein
[0016] To facilitate understanding, identical reference numerals
have been used, where possible, to designate identical elements
that are common to the figures. It is contemplated that elements
disclosed in one implementation may be beneficially utilized on
other implementations without specific recitation.
DETAILED DESCRIPTION
[0017] Embodiments described herein relate to a mattress topper,
also known as a pillow top mattress pad. A mattress topper is
generally placed on top of an existing bed or mattress for
additional comfort. The mattress topper may be covered with the
same or different sheets as the existing bed or mattress. Although
described herein as a mattress topper, embodiments described herein
are not limited to mattress toppers, but may include mattresses and
other body support type products.
[0018] FIG. 1 illustrates a body support system 100, such as a
mattress topper, according to one embodiment. The body support
system 100 includes a first support member 10, a second support
member 20, and an enclosure 30 for housing the first and second
support members 10, 20. A user may easily insert and remove the
support members 10, 20 to and from the enclosure 30 to adjust the
body support system 100 as further described herein. The system 100
may be placed on top of an existing bed or mattress to provide
additional comfort and/or support.
[0019] The first support member 10 may be positioned in a first
chamber 32 of the enclosure, and the second support member 20 may
be positioned in a second chamber 34 of the enclosure. The first
and second chambers 32, 34 may be separated by a wall or partition
33 to provide a physical barrier between the support members 10, 20
when disposed in the enclosure 30. The first and second chambers
32, 34, may each have an access side 31, 35, respectively, that can
be opened and closed for inserting, removing, and securing the
support members 10, 20 therein. The access sides 31, 35 may be
disposed on opposite sides of the enclosure 30. The access sides
31, 35 may be opened and closed using a zipper arrangement or other
similar fastening mechanisms.
[0020] When the support members 10, 20 are secured in the
respective chambers 32, 34 of the enclosure 30, the support members
10, 20 are disposed adjacent to each other such that they jointly
form a substantially flat and continuous top and bottom surface for
positioning on a bed or mattress for supporting one or more users.
Although the enclosure 30 is illustrated in FIG. 1 as a rigid,
rectangular housing, the entire enclosure 30 or one or more
portions thereof may be formed from a flexible cloth or sheet-type
material, a woven fabric material, and/or a pre-shrunk quilted
fabric material. The enclosure 30 may be formed from other types of
bedding materials known in the art.
[0021] The enclosure 30 may conform to the shapes of the support
members 10, 20. The support members 10, 20 may be formed in
numerous shapes and sizes. In one embodiment, the support members
10, 20 may have a rectangular shape. In one embodiment, the support
members 10, 20 when placed adjacent to each other may substantially
form the size of a full, queen, and/or king size mattress.
[0022] The first support member 10 may be formed by a first foam
layer 12 that is secured to a second foam layer 14 using an
adhesive 13, such as glue. Similarly, the second support member 20
may be formed by a third foam layer 22 that is secured to a fourth
foam layer 24 using an adhesive 23, such as glue. The foam layers
12, 14, 22, 24 may be made out of "memory foam" or polyurethane
foam having visco-elastic properties. One or more of the foam
layers 12, 14, 22, 24 may have a density of about 1-5 lbs/ft.sup.3.
In one embodiment, one or more of the foam layers 12, 14, 22, 24
may have a density that is different or the same as the density of
one or more of the other layers 12, 14, 22, 24. One or more of the
foam layers 12, 14, 22, 24 may have a thickness of about 1-5
inches. In one embodiment, one or more of the foam layers 12, 14,
22, 24 may have a thickness that is different or the same as the
thickness of one or more of the other layers 12, 14, 22, 24.
[0023] One or more of the foam layers 12, 14, 22, 24 may have an
indention load deflection ("ILD") rating of about 1-25 lbs. In one
embodiment, one or more of the foam layers, 12, 14, 22, 24 may have
an ILD rating of about 1-4 lbs, about 1-15 lbs, about 4-15 lbs,
about 4-20 lbs, and about 20-25 lbs. In one embodiment, one or more
of the foam layers 12, 14, 22, 24 may have an ILD rating of about
11 lbs, an ILD rating less than about 11 lbs, or an ILD rating
greater than about 11 lbs. In one embodiment, one or more of the
foam layers 12, 14, 22, 24 may have an ILD rating that is about 2-3
lbs greater than or less than the ILD rating of one or more of the
other foam layers 12, 14, 22, 24. In one embodiment, one or more of
the foam layers 12, 14, 22, 24 may have an ILD rating that is
different or the same as the ILD rating of one or more of the other
layers 12, 14, 22, 24.
[0024] In one embodiment, the foam layer 24 of the second support
member 20 may be infused with a gel material 25, such as a
polyurethane based gel. The gel material 25 may comprise polyether
or polyol. In one embodiment, the gel material 25 may be formed by
reacting a polyol with an isocyanate in the presence of a catalyst.
The gel material 25 may be in the form of particles or beads
embedded in the foam layer 24. The gel material 25 may be a polymer
such as elastomeric polymers, thermosetting polymers, thermoplastic
elastomers, and combinations thereof. Suitable gels include
polyurethane gels, silicone gels, PVC gels, polyorganosiloxane
gels, polyol gels, polyisocyanate gels, and combinations thereof.
The gel material 25 may provide additional support and/or increase
the thermal conductivity of the foam layer 24 to effectively remove
or absorb the body heat of a user, thereby providing a cool or
colder temperature support than a non-gel-infused layer. The
opposite foam layer 22 of the second support member 20 may be a
non-gel-infused layer. Although the gel-infused layer is
illustrated as foam layer 24 in FIG. 1, embodiments described
herein include one or more of the foam layers 12, 14, 22, 24 having
a gel component. In one embodiment, one or more of the foam layers
12, 14, 22, 24 may have a thermal conductivity that is different or
the same as the thermal conductivity of one or more of the other
foam layers 12, 14, 22, 24. In one embodiment, one or more of the
foam layers 12, 14, 22, 24 may include a layer of gel material
laminated or disposed across substantially all or a portion of the
upper surfaces of the foam layers. In one embodiment, one or more
of the foam layers 12, 14, 22, 24 may include one or more gel discs
or squares spaced across the upper surfaces of the foam layers.
[0025] In another embodiment, the gel material may be applied on a
surface of one or more of the foam layers 12, 14, 22, 24 in liquid
form and allowed to cure. For example, the gel material may be
applied in liquid form on top of the first foam layer 12 using a
brush or other tool suitable for applying the gel material in
liquid form. In another example, the gel material may be applied
using a device for spraying liquid. The applied gel material may
adhere to the foam layer without the use of any additional
adhesives such as glue, although an adhesive may optionally be used
to enhance attachment between the gel material and the foam layer.
After curing, the gel material forms a solid gel layer 41 above the
foam layer 12, as shown in FIG. 2. Multiple applications of the
liquid gel may be performed to increase the height of the gel layer
above the first foam layer 12. In one embodiment, after curing, the
height of the gel layer is from about 0.003 inches to about 2
inches. In another embodiment, the height of the gel layer is from
about 0.004 to about 0.5 inches. In yet another embodiment, the
height of the gel material is from about 0.004 to about 0.2 inches.
An exemplary process of forming the foam layer 12 having the solid
gel layer 41 is described below with reference to FIG. 3.
[0026] In one embodiment, the foam layers of the support members
10, 20 may have different support characteristics, including
different material properties, so that a user may lie on one of the
foam layers for a specific degree of comfort or support, and may
flip or adjust the support member 10, 20 to lie on the opposite
foam layer for a different degree of comfort or support. In one
example, the first foam layer 12 of the first support member 10 may
be relatively soft and have an ILD rating of about 7 lbs, while the
second foam layer 14 may be relatively firm and have an ILD rating
of about 14 lbs. In one embodiment, the first foam layer 12 may
have an ILD rating that is about 2-3 lbs greater than or less than
the ILD rating of the second foam layer 14. The foam layers of the
second support member 20 may be similarly situated. In this manner,
when the support members 10, 20 are secured adjacent to each other
in the enclosure 30, a user may position or adjust one of the
support members 10, 20 with the softer foam layer facing up, while
positioning or adjusting the other support member 10, 20 with the
firmer foam layer facing up for another user. In another example,
the support members 10, 20 may each have one gel-infused foam
layer, and an opposite non-gel-infused foam layer, so that one user
may lie on a gel-infused foam layer, while another user may lie on
a non-gel-infused layer of the same body support system 100. In yet
another example, the support members 10, 20 may each have one
gel-infused foam layer, and an opposite foam layer having a gel
layer formed thereon, so that one user may lie on a gel-infused
foam layer, while another user may lie on a gel layer above a foam
layer of the same body support system 100. In a further example,
the gel layer is formed by applying a gel material in liquid form
on the foam layer. Since the support members 10, 20 can be readily
inserted and removed to and from the enclosure 30, the body support
system 100 is adjustable to accommodate multiple comfort and
support preferences of one or more users.
[0027] FIG. 1 illustrates the first foam layer 12 of the first
support member 10 as the top layer disposed in the first chamber
32, and the fourth foam layer 24 of the second support member 20 as
the top layer disposed in the second chamber 34. As described
above, one or both of the support members 10, 20 may be adjusted so
that that the second foam layer 14 and/or the third foam layer 22
form the top layers for supporting a user. Embodiments described
herein include multiple variations of the above recited foam layer
characteristics and materials.
[0028] In another embodiment, at least one of the support members
10, 20 may contain only one foam layer. For example, the first
support member 10 may include a gel infused foam layer and the
second support member 20 may include a foam layer having a
different ILD rating than the foam layer of the first support
member 10. In yet another embodiment, the foam layer of the second
support member 20 may include a gel layer formed by a gel material
applied in liquid form on the foam layer.
[0029] FIG. 3 illustrates an exemplary process flow chart 300
showing a method for forming the foam layer having a gel layer
disposed thereon. At block 302, a plurality of holes is formed in a
foam layer, such as the foam layer 12. The foam layer 12 may be
made of any suitable material described herein. The plurality of
holes may be in any suitable pattern. In one embodiment, the holes
form a plurality of straight lines that are parallel to each other,
and the corresponding holes in adjacent lines may be aligned or
staggered, as illustrated in FIGS. 4 and 5. In FIG. 4, the holes in
line 410 are aligned with the holes in line 420 of the foam layer
441. In FIG. 5, the holes in line 510 are staggered with the holes
in line 520 of the foam layer 541. The holes in the same line or
the adjacent line may be spaced at about 1 inch to about 10 inches
apart from each other; preferably, at about 1.5 inches to about 6
inches apart; more preferably, at about 2 inches to about 5 inches
apart. In one embodiment, the holes are through holes, which extend
from a first surface of the foam layer to a second surface of the
foam layer that is opposite the first surface, such as from the top
surface to the bottom surface. The holes may have different cross
sectional shapes. In one embodiment, the holes have a circular
cross sectional shape. The holes have a diameter from about 0.25
inches to about 3 inches; preferably, from about 0.3 inches to
about 1.5 inches. The holes may be formed in any suitable manner,
such as forming each hole individually or forming multiples holes
at one time. In another embodiment, a line of holes or multiple
lines of holes are formed simultaneously. For example, the foam
layer 12 may be positioned on a conveyor belt, and the holes may be
formed as the foam layer 12 passes through a hole punch machine. In
one embodiment, the holes are formed to increase ventilation
through the foam layer 12.
[0030] At block 304, a first layer of gel is deposited on the top
surface of the foam layer. Suitable gels for the first layer of gel
include polyurethane gels, silicone gels, PVC gels,
polyorganosiloxane gels, polyol gels, polyisocyanate gels,
polyether gels and combinations thereof. The first layer of gel may
be deposited by passing the foam layer 12 under a roller. The
roller may be heated and coated with the gel in liquid form. In one
embodiment, the roller may be part of a top coating machine, gluing
machine, or other machine suitable for applying a liquid layer on
the upper surface of the foam layer. As the foam layer is passed
under the roller, the roller contacts the top surface of the foam
layer, and as the roller spins, the upper surface of the foam layer
is coated with the liquid gel. In one embodiment, the roller spins
stationarily and the foam layer is placed on a conveyor, which
moves the foam layer under the stationary spinning roller. Because
the holes in the foam layer 12 were already formed, the roller does
not contact holes, and thereby does not deposit the liquid gel
inside the holes. Also, because the amount of liquid gel deposited
on the top surface is small, the liquid gel does not substantially
deposit inside the plurality of holes of the foam layer or on the
side surfaces of the foam layer.
[0031] At block 306, the liquid gel is cured to form a thin layer
of solid gel. For example, the curing may be performed at room
temperature. The layer of solid gel may have a height between about
0.003 inches to about 2 inches. In another embodiment, the height
of the gel layer is from about 0.004 inches to about 0.5 inches. In
yet another embodiment, the height of the gel material is from
about 0.004 to about 0.2 inches.
[0032] At block 308, multiple gel layers may be optionally be
deposited to increase the height of the solid gel layer. For
example, blocks 304 and 306 may be repeated to increase the height
of the solid gel layer. For example, blocks 304 and 306 are
repeated one time to double the height. In another example,
multiple gel layers are deposited to achieve a total gel height
from about 0.003 inches to about 2 inches; preferably, from about
0.004 inches to about 0.2 inches. In another embodiment, the
additional gel layers deposited may be at the same or different
height as the first gel layer or other gel layers. In one
embodiment, two, three, four, five, or more gel layers may be
deposited on the foam layer. The use of multiple gel layers to
achieve a predetermined height may ensure the plurality of holes
formed in the foam layer remain substantially free of gel, thus
improving ventilation.
[0033] At block 309, after the layer of solid gel having a
predetermined height is formed on the top surface of the foam
layer, an optional powder may be applied to the surface of the
layer of solid gel to improve the surface of the layer of solid
gel. The powder prevents the surface of the layer of solid gel from
sticking to other surfaces that may come in contact with the
surface of the layer of solid gel.
[0034] In one embodiment, a body support system includes an
enclosure having a first chamber and a second chamber; a first
support member having a first foam layer secured to a second foam
layer, wherein the first and second foam layers have different
support characteristics; and a second support member having a third
foam layer secured to a fourth foam layer, wherein the third and
fourth foam layers have different support characteristics, and
wherein the first and second support members are removable from and
securable in the first and second chambers, respectively.
[0035] In one or more of the embodiments described herein, the
support characteristics include at least one of density, indention
load deflection, thermal conductivity, firmness, softness, and
material type.
[0036] In one or more of the embodiments described herein, the
first foam layer includes an indention load deflection rating that
is about 2-3 lbs greater than an indention load deflection rating
of the second foam layer.
[0037] In one or more of the embodiments described herein, the
third foam layer includes an indention load deflection rating that
is about 2-3 lbs greater than an indention load deflection rating
of the fourth foam layer.
[0038] In one or more of the embodiments described herein, one of
the foam layers of the first and second support members includes a
gel-infused foam layer, and wherein the other one of the foam
layers of the first and second support members includes a
non-gel-infused foam layer.
[0039] In one or more of the embodiments described herein, one of
the foam layers of the first and second support members is softer
than the other one of the foam layers of the first and second
support members.
[0040] In one or more of the embodiments described herein, one of
the foam layers of the first and second support members is firmer
than the other one of the foam layers of the first and second
support members.
[0041] In one or more of the embodiments described herein, the
first and second support members are disposed in the enclosure such
that the first foam layer and the third foam layer jointly form a
substantially continuous upper support surface, and wherein the
first foam layer has different support characteristics than the
third foam layer.
[0042] In one or more of the embodiments described herein, one of
the foam layers includes a gel disposed on a top surface.
[0043] In one or more of the embodiments described herein, the gel
is applied on the top surface in liquid form.
[0044] In one or more of the embodiments described herein, the gel
is applied using a brush or a spray device.
[0045] In another embodiment, a body support system includes a foam
layer; and a gel layer disposed on the foam layer, wherein the gel
layer is applied in liquid form and allowed to cure on the foam
layer.
[0046] In one or more of the embodiments described herein, the foam
layer comprises a polyurethane foam having viscoelastic
properties.
[0047] In one or more of the embodiments described herein, the gel
layer comprises a polyurethane gel.
[0048] In one or more of the embodiments described herein, the gel
layer has a height of about 0.004 inches to about 0.5 inches.
[0049] In another embodiment, a method for forming a foam apparatus
includes forming a plurality of holes in a foam layer, depositing a
layer of liquid gel on a surface of the foam layer, and curing the
layer of liquid gel to form a layer of solid gel.
[0050] In one or more of the embodiments described herein, the
method further includes repeating the depositing step and the
curing step until a total height of the layer of solid gel reaches
a predetermined height.
[0051] In one or more of the embodiments described herein, the
method further includes applying a powder on a top surface of the
layer of solid gel.
[0052] In one or more of the embodiments described herein, the
plurality of holes are through holes.
[0053] In one or more of the embodiments described herein, the
layer of liquid gel is cured at room temperature.
[0054] While the foregoing is directed to embodiments of the
present disclosure, other and further embodiments may be devised
without departing from the basic scope thereof, and the scope
thereof is determined by the claims that follow.
* * * * *