U.S. patent application number 15/463129 was filed with the patent office on 2018-08-23 for method and system for internal shock isolation.
The applicant listed for this patent is Dell Products L.P.. Invention is credited to Nicholas D. Abbatiello, Deeder M. Aurongzeb, B. Bryce Busby.
Application Number | 20180242473 15/463129 |
Document ID | / |
Family ID | 56010136 |
Filed Date | 2018-08-23 |
United States Patent
Application |
20180242473 |
Kind Code |
A1 |
Abbatiello; Nicholas D. ; et
al. |
August 23, 2018 |
METHOD AND SYSTEM FOR INTERNAL SHOCK ISOLATION
Abstract
Methods and systems are disclosed for internal shock isolation
in an information handling system. The method includes directing a
tool to mold an outer frame of an information handling system, and
directing the tool to mold an inner frame of the information
handling system. The inner frame has a perimeter less than the
perimeter of the outer frame. The method further includes directing
the tool to construct a first plurality of braces in an
interspatial area. The interspatial area is between the perimeter
of the inner frame and the perimeter of the outer frame.
Inventors: |
Abbatiello; Nicholas D.;
(Round Rock, TX) ; Busby; B. Bryce; (Round Rock,
TX) ; Aurongzeb; Deeder M.; (Austin, TX) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Dell Products L.P. |
Round Rock |
TX |
US |
|
|
Family ID: |
56010136 |
Appl. No.: |
15/463129 |
Filed: |
March 20, 2017 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
14550648 |
Nov 21, 2014 |
9639115 |
|
|
15463129 |
|
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|
|
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B29C 45/0062 20130101;
B29L 2031/3481 20130101; B29K 2021/003 20130101; H05K 7/1487
20130101; G06F 1/16 20130101; B29K 2069/00 20130101; F16F 7/00
20130101; B29C 45/1676 20130101; F16F 1/373 20130101; G06F 1/1656
20130101; H05K 7/1495 20130101 |
International
Class: |
H05K 7/14 20060101
H05K007/14; B29C 45/16 20060101 B29C045/16 |
Claims
1. An internal isolation system comprising: an outer frame of an
information handling system; an inner frame of the information
handling system, the inner frame having a perimeter less than the
perimeter of the outer frame; a first plurality of braces in a
corner portion of an interspatial area, the interspatial area
between the perimeter of the inner frame and the perimeter of the
outer frame; and a skin covering the interspatial area and coupling
the inner frame with the outer frame; wherein the first plurality
of braces allows the inner frame to move relative to the outer
frame in an x-axis direction and in a y-axis direction; and wherein
the skin isolates the inner frame and the outer frame in a z-axis
direction.
2. The system of claim 1, wherein the first plurality of braces
includes a separation space between adjacent braces.
3. The system of claim 2, wherein the separation space between each
adjacent brace is approximately equal.
4. The system of claim 1, further comprising a second plurality of
braces located in a side portion of the interspatial area.
5. The system of claim 4, wherein the first plurality of braces
includes a first separation space between adjacent braces; the
second plurality of braces includes a second separation space
between adjacent braces, and the first separation space is less
than the second separation space.
6. The system of claim 1, wherein the first plurality of braces are
shaped as trapezoids.
7. The system of claim 1, wherein the first plurality of braces are
shaped as I-beams.
8. The system of claim 1, wherein the first plurality of braces are
constructed of thermoplastic elastomer material.
9. The system of claim 1, wherein the configuration of the first
plurality of braces is based on a dynamic modulus.
10. The system of claim 1, wherein the interspatial area has a
consistent thickness.
11. An internal isolation system comprising: an outer frame of an
information handling system; an inner frame of the information
handling system, the inner frame having a perimeter less than the
perimeter of the outer frame; a first plurality of braces in an
interspatial area, the interspatial area between the perimeter of
the inner frame and the perimeter of the outer frame; and a
component of the information handling system assembled in the inner
frame; and a skin covering the interspatial area and coupling the
inner frame with the outer frame; wherein the first plurality of
braces allows the inner frame to move relative to the outer frame
in an x-axis direction and in a y-axis direction; and wherein the
skin isolates the inner frame and the outer frame in a z-axis
direction.
12. The system of claim 11, wherein the first plurality of braces
includes a separation space between adjacent braces.
13. The system of claim 12, wherein the separation space between
each adjacent brace is approximately equal.
14. The system of claim 11, further comprising a second plurality
of braces in the interspatial area, wherein the first plurality of
braces are located in a corner portion of the interspatial area and
the second plurality of braces are located in a side portion of the
interspatial area.
15. The system of claim 14, wherein the first plurality of braces
includes a first separation space between adjacent braces; the
second plurality of braces includes a second separation space
between adjacent braces, and the first separation space is less
than the second separation space.
16. The system of claim 11, wherein the first plurality of braces
are shaped as trapezoids.
17. The system of claim 11, wherein the first plurality of braces
are shaped as I-beams.
18. The system of claim 11, wherein the first plurality of braces
are constructed of thermoplastic elastomer material.
19. The system of claim 11, wherein the configuration of the first
plurality of braces is based on a dynamic modulus.
20. The system of claim 11, wherein the interspatial area has a
consistent thickness.
Description
RELATED APPLICATIONS
[0001] This application is a continuation of U.S. patent
application Ser. No. 14/550,648 filed Nov. 21, 2014, the contents
of which is incorporated by reference herein.
TECHNICAL FIELD
[0002] This disclosure relates generally to information handling
systems and, more particularly, to a system and method for internal
shock isolation.
BACKGROUND
[0003] As the value and use of information continues to increase,
individuals and businesses seek additional ways to process and
store information. One option available to users is information
handling systems. An information handling system generally
processes, compiles, stores, and/or communicates information or
data for business, personal, or other purposes thereby allowing
users to take advantage of the value of the information. Because
technology and information handling needs and requirements vary
between different users or applications, information handling
systems may also vary regarding what information is handled, how
the information is handled, how much information is processed,
stored, or communicated, and how quickly and efficiently the
information may be processed, stored, or communicated. The
variations in information handling systems allow for information
handling systems to be general or configured for a specific user or
specific use such as financial transaction processing, airline
reservations, enterprise data storage, or global communications. In
addition, information handling systems may include a variety of
hardware and software components that may be configured to process,
store, and communicate information and may include one or more
computer systems, data storage systems, and networking systems.
[0004] Advancements in packaging design have reduced both the
weight and thickness of information handling systems. In
particular, components included in portable information handling
systems, such as laptops, notebooks, and tablet form factors, are
the object of efforts to reduce weight and thickness, without
compromising structural strength. Touch-screen displays are rapidly
becoming a primary interface between a user and a portable
information handling system and often include a display and a cover
glass. Displays and cover glass are susceptible to breakage when
portable information handling systems drop or fall and impact
another surface, e.g., experience an "impact event." Upon impact,
the cover glass may crack, shatter, or delaminate. Further, other
portions of the information handling system may be dented or
otherwise become damaged as a result of the impact event.
SUMMARY
[0005] In accordance with an embodiment of the present disclosure,
a method of manufacturing an internal isolation system includes
directing a tool to mold an outer frame of an information handling
system, and directing the tool to mold an inner frame of the
information handling system. The inner frame has a perimeter less
than the perimeter of the outer frame. The method further includes
directing the tool to construct a first plurality of braces in an
interspatial area. The interspatial area is between the perimeter
of the inner frame and the perimeter of the outer frame.
[0006] In accordance with another embodiment of the present
disclosure, an internal isolation system for an information
handling system includes an outer frame of an information handling
system and an inner frame of the information handling system. The
inner frame has a perimeter less than the perimeter of the outer
frame. The system also includes a first plurality of braces in an
interspatial area. The interspatial area is between the perimeter
of the inner frame and the perimeter of the outer frame.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] A more complete understanding of the present embodiments and
advantages thereof may be acquired by referring to the following
description taken in conjunction with the accompanying drawings, in
which like reference numbers indicate like features, and
wherein:
[0008] FIG. 1 illustrates a block diagram of an example information
handling system in accordance with some embodiments of the present
disclosure;
[0009] FIG. 2 illustrates an example portable information handling
system with an internal shock isolation system in accordance with
some embodiments of the present disclosure;
[0010] FIG. 3 illustrates an example front view of a portable
information handling system with an internal shock isolation system
in accordance with some embodiments of the present disclosure;
and
[0011] FIG. 4 illustrates a flowchart of an example manufacturing
method for an internal shock isolation system in a portable
information handling system in accordance with some embodiments of
the present disclosure.
DETAILED DESCRIPTION
[0012] In the following description, details are set forth by way
of example to facilitate discussion of the disclosed subject
matter. It should be apparent to a person of ordinary skill in the
field, however, that the disclosed embodiments are exemplary and
not exhaustive of all possible embodiments.
[0013] For purposes of this disclosure, an information handling
system may include any instrumentality or aggregate of
instrumentalities operable to compute, classify, process, transmit,
receive, retrieve, originate, switch, store, display, manifest,
detect, record, reproduce, handle, or utilize any form of
information, intelligence, or data for business, scientific,
control, or other purposes. For example, an information handling
system may be a personal computer, a network storage resource, or
any other suitable device and may vary in size, shape, performance,
functionality, and price. The information handling system may
include random access memory (RAM), one or more processing
resources such as a central processing unit (CPU) or hardware or
software control logic, ROM, and/or other types of nonvolatile
memory. Additional components of the information handling system
may include one or more disk drives, one or more network ports for
communicating with external devices as well as various input and
output (I/O) devices, such as a keyboard, a mouse, and a video
display. The information handling system may also include one or
more buses operable to transmit communications between the various
hardware components.
[0014] For the purposes of this disclosure, computer-readable media
may include any instrumentality or aggregation of instrumentalities
that may retain data and/or instructions for a period of time.
Computer-readable media may include, without limitation, storage
media such as a direct access storage device (e.g., a hard disk
drive or floppy disk), a sequential access storage device (e.g., a
tape disk drive), compact disk, CD-ROM, DVD, random access memory
(RAM), read-only memory (ROM), electrically erasable programmable
read-only memory (EEPROM), and/or flash memory; as well as
communications media such wires, optical fibers, microwaves, radio
waves, and other electromagnetic and/or optical carriers; and/or
any combination of the foregoing.
[0015] FIG. 1 illustrates a block diagram of an example information
handling system 100 in accordance with some embodiments of the
present disclosure. Information handling system 100 may generally
be operable to receive data from, and/or transmit data to, other
information handling systems 100. Information handling system 100
may be a laptop computer, a desktop computer, a tablet computer, a
2-in-1 device, a personal digital assistant (PDA), a mobile phone,
or any similar device. For example, information handling system 100
may be a tablet.
[0016] As shown in FIG. 1, components of information handling
system 100 may include, but are not limited to, processor subsystem
120, which may comprise one or more processors, and system bus 121
that communicatively couples various system components to processor
subsystem 120 including, for example, a memory subsystem 130, an
I/O subsystem 140, local storage resource 150, and a network
interface 160. System bus 121 may represent a variety of suitable
types of bus structures, e.g., a memory bus, a peripheral bus, or a
local bus using various bus architectures in selected embodiments.
For example, such architectures may include, but are not limited
to, Micro Channel Architecture (MCA) bus, Industry Standard
Architecture (ISA) bus, Enhanced ISA (EISA) bus, Peripheral
Component Interconnect (PCI) bus, PCI-Express bus, HyperTransport
(HT) bus, and Video Electronics Standards Association (VESA) local
bus.
[0017] Processor subsystem 120 may comprise a system, device, or
apparatus operable to interpret and/or execute program instructions
and/or process data, and may include a microprocessor,
microcontroller, digital signal processor (DSP), application
specific integrated circuit (ASIC), or another digital or analog
circuitry configured to interpret and/or execute program
instructions and/or process data. In some embodiments, processor
subsystem 120 may interpret and/or execute program instructions
and/or process data stored locally (e.g., in memory subsystem 130
and/or another component of physical hardware 102). In the same or
alternative embodiments, processor subsystem 120 may interpret
and/or execute program instructions and/or process data stored
remotely (e.g., in network storage resource 170).
[0018] Memory subsystem 130 may comprise a system, device, or
apparatus operable to retain and/or retrieve program instructions
and/or data for a period of time (e.g., computer-readable media).
Memory subsystem 130 may comprise random access memory (RAM),
electrically erasable programmable read-only memory (EEPROM), a
PCMCIA card, flash memory, magnetic storage, opto-magnetic storage,
and/or a suitable selection and/or array of volatile or
non-volatile memory that retains data after power to its associated
information handling system, such as system 100, is powered down.
Local storage resource 150 may comprise computer-readable media
(e.g., hard disk drive, floppy disk drive, CD-ROM, and/or other
type of rotating storage media, flash memory, EEPROM, and/or
another type of solid state storage media) and may be generally
operable to store instructions and/or data. Likewise, network
storage resource 170 may comprise computer-readable media (e.g.,
hard disk drive, floppy disk drive, CD-ROM, and/or other type of
rotating storage media, flash memory, EEPROM, and/or other type of
solid state storage media) and may be generally operable to store
instructions and/or data. In system 100, I/O subsystem 140 may
comprise a system, device, or apparatus generally operable to
receive and/or transmit data to/from/within system 100. I/O
subsystem 140 may represent, for example, a variety of
communication interfaces, graphics interfaces, video interfaces,
user input interfaces, and/or peripheral interfaces. As shown, I/O
subsystem 140 may comprise touch panel 142 and display adapter 144.
Touch panel 142 may include circuitry for enabling touch
functionality in conjunction with display 146 that is driven by
display adapter 144. As shown, display 146 may include a display
cover or display glass.
[0019] In FIG. 1, network interface 160 may be a suitable system,
apparatus, or device operable to serve as an interface between
information handling system 100 and a network. Network interface
160 may enable information handling system 100 to communicate over
a network using a suitable transmission protocol and/or standard. A
network may include, or may be a part of, a storage area network
(SAN), personal area network (PAN), local area network (LAN), a
metropolitan area network (MAN), a wide area network (WAN), a
wireless local area network (WLAN), a virtual private network
(VPN), an intranet, the Internet or another appropriate
architecture or system that facilitates the communication of
signals, data and/or messages (generally referred to as data).
[0020] In some embodiments, information handling system 100 may be
a portable information handling system, such as a tablet. A
portable Information handling system may be designed to withstand
an impact event, e.g., dropping or falling. For example, using a
portable information handling system in a hospital or educational
environment may result in situations where the portable system is
susceptible to damage due to dropping. One approach to increasing
durability of portable information handling systems may be to
strengthen the enclosure such that the enclosure experiences the
brunt of the impact. For example, a ruggedized notebook or tablet
may utilize this approach. However, strengthening the enclosure may
not be the most advantageous method for minimizing damage to a
portable information handling system during an impact event. For
example, a corner drop test of a tablet may reveal that, due to the
rigidity of the enclosure, a tablet bends backwards and puts the
cover glass in tension causing the glass to break. Further, during
a face drop test of a tablet, the cover glass may delaminate from
the rest of the portable information handling system. Moreover, a
ruggedized product may include an external case, appear bulky,
increase weight, and may not be aesthetically suitable for some
applications.
[0021] Thus, in some embodiments, a system and method for improved
durability of a portable information handling system is described.
In some embodiments, durability may be improved in the absence of
ruggedized components such as an external case. The present
disclosure utilizes multiple frames, e.g., an inner frame and an
outer frame, to allow the display and cover glass to float or be
isolated from the shock of the impact energy. However, the system
is rigid such that, during use, a user may not notice the inner
frame moving relative to the outer frame.
[0022] FIG. 2 illustrates an example portable information handling
system 200 with an internal shock isolation system in accordance
with some embodiments of the present disclosure. Portable
information handling system 200 includes outer frame 202, inner
frame 204, and interspatial area 206.
[0023] Outer frame 202 may be configured to support and provide
structure to components of portable information handling system
200. Outer frame 202 may be of any suitable size as needed for the
application. Outer frame 202 may be constructed of an impact
resistant material, such as a polymer or polycarbonate. Outer frame
202 may have a thickness that provides the appropriate amount of
strength and rigidity. For example, outer frame 202 may be
approximately one millimeter (mm) thick.
[0024] Inner frame 204 may be configured to fit inside the
dimensions of outer frame 202 and allow for interspatial area 206.
As such, the perimeter of inner frame 204 may be less than the
perimeter of outer frame 202. Inner frame 204 may include the
elements of information handling system 100 described above with
reference to FIG. 1. For example, inner frame 204 may have mounted
or configured in it processor subsystem 120, system bus 121, memory
subsystem 130, I/O subsystem 140, local storage resource 150,
network interface 160, and/or any other suitable devices utilized
in information handling system 100. Inner frame 204 may be
constructed of reinforced plastic, magnesium, or other suitable
material. Inner frame 204 may be configured to fit inside the
dimensions of outer frame 202 while allowing for sufficient
thickness for interspatial area 206.
[0025] Interspatial area 206 may include a material or structure
that allows inner frame 204 to move relative to outer frame 202 in
both the x-axis and y-axis directions. Interspatial area 206 may be
a gap that is filled with air or any other suitable medium, and may
include one or multiple braces 210. Braces 210 may function to
absorb the energy by allowing and arresting the movement of inner
frame 204 during an impact event. Braces 210 may be of any suitable
shape and/or orientation. For example, the shape of braces 210 may
be substantially circular, oval, quadrilateral, such as a
trapezoidal shape as shown in FIG. 2, an I-beam, or any other
suitable shape. Braces 210 may be construed of a material that is
capable of absorbing or dissipating impact energy. A design
consideration may include maximizing the tan delta or loss factor
of the material to dissipate impact energy perpendicular to the
impact direction into a safer form of energy, such as heat. For
example, braces 210 may be construed of an elastomeric material,
such as VERSAFLEX Thermoplastic Elastomer manufactured by PolyOne
Corp. (McHenry, Ill.).
[0026] In some embodiments, braces 210 may be placed throughout
interspatial area 206. Braces 210 may be configured such that
adjacent braces 210 may be separated by a predefined separation
space. In some embodiments, the separation space may be
approximately similar throughout interspatial area 206. In some
embodiments, the separation space may be dissimilar based on the
location in the interspatial area 206 of a particular brace 210.
For example, in corner areas 212, braces 210 may be more closely
spaced than in side areas 214. Close spacing of braces 210 in
corner areas may improve the ability of portable information
handling system 200 to remain undamaged when subject to a corner
drop or corner impact event.
[0027] In some embodiments, the configuration, dimensions, material
properties, and location of braces 210 may be based on design
considerations including the environment that portable information
handling system 200 may be used. Calculations may be performed to
determine appropriate configurations, dimensions, material
properties, and locations for braces 210. The following exemplary
analysis of braces 210 may be performed in an iterative manner to
determine the appropriate characteristics. Energy to be dissipated
from a drop may be represented by:
E.sub.drop=mass*gravity*height (1)
[0028] where: [0029] mass=mass of portable information handling
system; [0030] height=height of drop; and gravity=9.81
m/s.sup.2.
[0031] As example, the energy generated by a drop (E.sub.drop) of
an approximately 0.45 kilogram (kg) tablet from a height of
approximately 2 meters is 8.83 Newton*meters (Nm). Equation (1)
assumes a rigid drop surface.
[0032] In some embodiments, the potential energy of braces 210 is
designed to be approximately the energy generated by the drop
E.sub.drop. Treating braces 210 as a spring:
E.sub.spring=K*x.sup.2 (2)
[0033] where: [0034] K=spring constant; and [0035] x=displacement
of the spring. Solving for the spring constant:
[0035] K.sub.system=E.sub.drop/x.sup.2.
As example, if the distance between inner frame 204 and outer frame
202, e.g., thickness, t, of interspatial area 206, is set at
approximately 10 mm, then 10 mm is also the maximum displacement of
the spring, x. Thus, K.sub.system 8.83 Nm/(0.01 m).sup.2=88300
N/m.
[0036] As example, a design may assume that corner area 212 can
include 10 individual braces 210. Thus, the spring constant for
each brace 210 may be:
K.sub.spring=K.sub.system/10 (3).
Further, K.sub.spring may also be expressed as:
K.sub.spring=(E.sub.dynamic*l*w)/t
[0037] where: [0038] E.sub.dynamic=the dynamic modulus of the
elastomer that constitutes brace 210; [0039] l=length of brace 210;
and [0040] w=width of brace 210.
Solving for E.sub.dynamic:
[0041] E.sub.dynamic=(K.sub.spring*/(l*w) (4).
[0042] As example, the length of brace 210 may be approximately 7
mm and width may be approximately 2 mm. Thus, E.sub.dynamic=(8830
N/m*0.01 m)/(0.007 m*0.002 m)=630,714 Pascals (Pa). Accordingly,
the material selected for braces 210 with the selected geometry may
require a dynamic modulus of approximately 0.63 MPa. Any parameter
of the foregoing exemplary analysis may be modified and further
calculation may be completed in some embodiments of the present
disclosure.
[0043] FIG. 3 illustrates an example front view of portable
information handling system 200 with an internal shock isolation
system in accordance with some embodiments of the present
disclosure. Portable information handling system 200 may include
cover glass 302 and skin 304. Cover glass 302 may include one or
multiple glass sheets or other suitable material. Cover glass 302
may be configured to match the exterior dimensions of inner frame
204, discussed with reference to FIG. 2. For example, cover glass
302 may have an appropriate size and thickness, such as
approximately fifty microns.
[0044] Skin 304 may be configured to cover interspatial area 206
and couple inner frame 204 with outer frame 202. Skin 304 may be
constructed of any suitable material, for example elastomeric
material. Skin 304 may serve as a cosmetic surface and provide
isolation for face drops or face impact events. As such, skin 304
may allow the inner frame 204 to move in the z-axis direction
relative to outer frame 202 during a face drop or face impact
event.
[0045] FIG. 4 illustrates a flowchart of an example manufacturing
method 400 for an internal shock isolation system in a portable
information handling system in accordance with some embodiments of
the present disclosure. The steps of method 400 may be performed by
various computer programs, models or any combination thereof. The
programs and models may include instructions stored on a
computer-readable medium that are operable to perform, when
executed, one or more of the steps described below. The
computer-readable medium may include any system, apparatus or
device configured to store and/or retrieve programs or instructions
such as a microprocessor, a memory, a disk controller, a compact
disc, flash memory or any other suitable device. The programs and
models may be configured to direct a processor or other suitable
unit to retrieve and/or execute the instructions from the
computer-readable medium. For example, method 400 may be executed
by a manufacturing system and/or other suitable source. For
illustrative purposes, method 400 may be described with respect to
manufacturing the internal shock isolation of portable information
handling system 200 of FIG. 2; however, method 400 may be used for
manufacturing an internal shock isolation system of any suitable
configuration.
[0046] At step 405, the manufacturing system directs a tool to mold
the outer frame. For example, outer frame 202 may be molded from
impact resistant material such as LEXAN Resin (polycarbonate). The
manufacturing system may direct an injection molding tool to mold
the outer frame based on final dimensions determined for outer
frame 202, such as a thickness of approximately 1.5 mm or less. The
thickness of outer frame 202 may be minimized to allow for energy
to be transmitted to braces 210.
[0047] At step 410, the manufacturing system directs a tool to mold
the inner frame. For example, inner frame 204 may be molded from
reinforced plastic, magnesium, or other suitable material.
[0048] At step 415, the manufacturing system directs a tool to
construct the braces. Outer frame 202 and inner frame 204 may be
placed into an injection molding tool. The front of outer frame 202
and inner frame 204 may face the cavity side of the injection
molding tool. The injection molding tool may be closed on both
frames and material to construct braces 210 may be injected. For
example, a thermoplastic elastomeric material (TPE) may be
injected. The material for braces 210 may be injected based on a
design for the configuration, dimensions, material properties, and
location of braces 210 determined by the use of Equations (1)-(4)
discussed with reference to FIG. 2. Once the material for braces
210 (e.g., TPE material) is cooled below the glass transition
temperature (T.sub.g), inner frame 204 and outer frame 206 may be
coupled and removed from the injection molding tool. In some
embodiments, locking mechanisms may be included in the molding of
inner frame 204 and outer frame 202, such that the TPE or other
suitable material flows around the locking mechanism and creates a
mechanical bond.
[0049] At step 420, the manufacturing system assembles the portable
information handling system. For example, the elements described
with reference to FIG. 1 may be installed within inner frame
204.
[0050] Modifications, additions, or omissions may be made to method
400 without departing from the scope of the present disclosure and
invention. For example, the order of the steps may be performed in
a different manner than that described and some steps may be
performed at the same time. For example, step 405 and 410 may be
performed simultaneously. Additionally, each individual step may
include additional steps without departing from the scope of the
present disclosure.
[0051] Although the present disclosure and its advantages have been
described in detail, it should be understood that various changes,
substitutions and alternations can be made herein without departing
from the spirit and scope of the disclosure as defined by the
following claims.
* * * * *