FIELD OF THE INVENTION
The present invention relates to a system of cladding of Aluminum
composite panel in different sizes on exterior or interior of load bearing
walls of buildings and other structures. More particularly, invention is
directed to pressure equalized rain screen cladding wall system
comprising selective extruded metal sections, angles, bracket etc and the
said Aluminum composite panel in an assembly for such cladding safely,
securely attached to a bracket / support wall. Advantageously, the
pressure equalized cladding wall system of the present invention is
adapted to providing rain screen on exterior walls having on one hand
desired strength to with stand wind load or resistance to water flow
protecting the load bearing wall from heat, rain and exposure to open
weather in a simple, safe and secured manner, free of any risk of fall
upon breakage of said Aluminum composite panels, and on the other
hand would provide desired aesthetic and preferred decorative look and
style on interior as well as exterior walls. The system according to the
present invention is adapted for using in a wide range of Aluminum
composite panel or any other metal composite panel which can be
applied in exterior or interiors of building. The system is advantageously
adapted for use as rain screen panel or finished product. The cladding
system of the invention is adapted based on all technical parameters
which are as per relevant standards and to take care of climatic
conditions along with safety measure like preventing Aluminum
composite panel from falling down in case of accidental damage. The
present invention is thus capable of providing a wall cladding system
adapted for protective as well as decorative wall cover using Aluminum
composite panel as pressure equalized rain screen facade system and is
thus capable of wide scale household/commercial or industrial

application in walls of building and structures as well as for roof and
sloping portions.
BACKGROUND OP THE INVENTION
In the prior art are known various building panel systems and method for
installing wall panels to an exterior wall of a building, where the panels
are made of Aluminum. There are various problems with known
aluminum composite panel attachment systems. Conventionally, such
systems have relied upon adhesive or weather sealant to "seal" the
aluminum panel from the elements. However, under exposure to heat
and cold and moisture, the adhesive or silicone breaks down. This, in
turn, compromises the stability of the system and creates an undesirable
appearance. Even when such a seal is functional, there may be
undesirable effects on the aluminum composite panels as the interior
environment can trap heat which affects the panels, creating "oil-
canning" or popping in response to the pressure differential. In spite of
such seals, such systems can also trap moisture in the wall cavity, which
results in oxidation of parts and staining or deterioration of exterior wall
surfaces.
More recently, systems have been developed according to the "rain screen
principle." This means that the wall cavity is vented, resulting in a
temperature and pressure equalized system with moisture drainage.
However, such systems can be difficult to install, relying on many
components to be milled or adapted onsite, and requiring excessive

labour costs and specialty materials. A need exists for a method of
installing wall panels using exterior wall panel attachment systems and
which permits the ingress and egress of moisture behind the panels.
Further, a need exists for a method of attaching wall panels using an
attachment system in which the wall panels can be attached to a wall in
any sequence or direction.
SUMMARY OF THE INVENTION
This system is developed according to the rain screen principle. This
means that the wall cavity is vented, resulting in a temperature and
pressure equalized system with moisture drainage. This system allows
engineer to form ACP as tray using traditional rout and return and in
grove ACP plank are inserted which provides seamless ACP colour and
same time take care of water, air, dust, moisture entrance in the system.
The pressure equalization system for Aluminum composite panel
includes a plurality of wall panels. Each wall panel has an exterior flat
surface and at least two side surfaces bent generally perpendicularly to
the exterior flat surface. In this way, a hollow interior portion is defined.
Preferably, each wall panel comprises an aluminum composite material.
A method for installing wall panels to an exterior wall of a building is
provided. Each of the wall panels has an exterior surface and at least two
side surfaces bent inwardly at an angle to the exterior surface. The side

surfaces define a hollow interior portion. Preferably, the exterior surfaces
are substantially flat.
Each of the wall panels preferably comprises an aluminum composite (or
other metal) material. In one arrangement, each of the wall panels
comprises an aluminum composite material which is routed and bent
generally perpendicularly to form the exterior and side surfaces.
In one aspect, the method includes fastening a bracket assembly to the
exterior building wall. The bracket assembly may define two back-to-
back L-angle brackets fastened to each other to form a generally Z-
shaped assembly. A first end of the L angle bracket is for attachment to
the wall, and a second end is for fastening to the attachment clip. The
bracket assembly may be fabricated substantially from steel.
The method also includes providing a plurality of elongated panel
perimeter strips. Each of the panel perimeter strips has a generally C-
shaped member configured to reside inside a wall panel. Each C-shaped
member extends along an inside portion of a side surface.
A panel perimeter strip is fastened within and along at least two of the
side surfaces of the wall panels.

A thorough-opening may be provided through the wall panels to permit
fluid communication from the atmosphere into the hollow interior portion
of the wall panels. This allows ingress and egress of air and moisture to
provide a pressure balanced and moisture-drained interior environment
for the wall panels.
The method may also include sliding an infill strip into the slot of the
first panel perimeter strip. The infill strip resides between the attachment
clip and the through opening so as to cover the fastener of the bracket
assembly. The infill strip is fabricated from a substantially rigid material
comprising a metal material, a polycarbonate material, polyethylene, or
combinations thereof. Preferably, an aluminum composite material is
used.
The infill strip may be engaged with the slot of the first panel perimeter
strip prior to installing the second wall panel. Alternatively, the infill strip
may be introduced to the slots of the first and second adjacent panel
perimeter strips after two adjacent wall panels have been installed. In
any instance, a separate infill strip may be installed between each wall
panel along adjacent side surfaces.
The method may also comprise installing a panel stiffener component.
The panel stiffener component is positioned inside the hollow interior
portion of the respective first and second wall panels to reinforce the
exterior surfaces of the wall panels and to prevent deforming or popping

of the wall panels. Additional wall panels may be attached to the exterior
wall using additional bracket assemblies, attachment clips and panel
perimeter strips.
Profile ALPL/P/112 is attached to wall using bracket assembly. Each
bracket assembly is configured to be fastened to the exterior wall. In one
aspect, each bracket assembly comprises two back-to-back L angle
brackets fastened to each other to form a generally Z shaped assembly. A
first end is for attachment to the wall, and a second end is for fastening
to an attachment clip. Preferably, the bracket assemblies are fabricated
from steel for strength. Bracket dimension and distance between Profile A
and bracket is not fixed as it changes as per structural calculation.
Profile ALPL/P/111 is fabricated by Aluminum. Each ACP panel
perimeter strip is configured to be fastened a respective wall panel. This
panel is Z-shaped profile in which ACP panel are inserted and in this
profile panel are inserted so that it does not allow entrance of air, water,
dust and moisture into the system. Profile B is fastened to ACP from all
sides and rivet is used to connect Profile b and ACP.
The pressure equalization system may optionally include panel stiffeners.
The panel stiffeners are positioned inside the hollow interior portion of
the respective ACP to reinforce the exterior surfaces of the ACP and to
prevent deforming or popping of the ACP.

The pressure equalization system is held together non-adhesively.
Further, each wall panel is ventilated at least partially through the one or
more rivets to permit ingress and egress of air and moisture to provide a
pressure-balanced and moisture-drained interior environment. In
addition, the attachment system is configured to allow panels to be
secured to respective panel perimeter strips in any sequence.
The pressure equalization system also includes one or more rivets. The
rivets are placed along the side surface of the wall panels to connect the
side surface of a respective wall panel to a receiving member of a panel
perimeter strip.
BRIEF DESCRIPTION OF THE DRAWING
The accompanying drawings which are incorporated in and constitute a
part of the specifications, illustrate presently preferred embodiments of
the invention and together with the detailed description, serve to explain
the principles of the invention
FIG 1 (a)is an illustrative horizontal view of the illustrative profile and Fig
1 (b) shows the cross sectional view of an attachment profile
FIG. 2(a) is an vertical view of an attachment profile and 2(b) is an
enlarged cross sectional view showing the system of FIG2(a)
FIG 3 shows the "L" angles connected by the screws

FIG 4(a) and (b) shows the L-angle bracket placed along the exterior
building surface in horizontal and vertical rows
FIG 5 shows the system which includes the perimeter strip attached to at
least two or preferably four side surfaces of the wall panels
FIG 6(a) and FIG 6(b) defines the Profile 1 - ALPL/P/111 and Profile 2 -
ALPL/P/112
DETAILED DESCRIPTION
A wall panel attachment system is provided herein. The wall panel
attachment system employs an extruded aluminum (or other metal)
attachment system for fastening a plurality of panels to a building
surface. The system's strength is enhanced by the use of an extruded
perimeter frame design which carries the dead load for the various
panels. The profiles used are-
Profile 1 - ALPL/P/111 - This profile is extruded from Aluminum Alloy
6063/6065 T5 is used at the perimeter of Aluminum Composite Panel
which prevents allowance of any foreign particle like air, dust, water, etc.
and holds the ACP panel.
Profile 2 - ALPL/P/112 - This profile is extruded from Aluminum Alloy
6063/6065 T5 is used to hold the ACP along with ALPL/P/111. In this
profile ACP strip is inserted to provide seamless ACP colour.

Profile ALPL/P/111 and Profile ALPL/P/112 is designed to be in
accordance with the rain screen principle. This means that the system is
designed so that a wall cavity formed under the individual panels is
vented, resulting in a pressure equalized system. Controlled moisture
drainage within the system, coupled with this equalized pressure,
contributes to effective, maintenance-free construction. The extruded
Aluminum may have a mill or an anodized finish.
To install the panel system, sub-framing is constructed. Preferably, the
sub framing comprises two back-to-back galvanized steel "L" angles. The
L-angles allow the installer to level the substrate in all three axes before
installation of panels. Preferably, stainless steel screws are used to
connect the L-angles to the building surface. Further, the L-angles
themselves may be connected through stainless steel screws.
The sub-framing is typically installed horizontally at each horizontal
joint. L angles, as installed on an exterior building surface. It can be seen
that a series of finished ACM panel assemblies have been mounted onto
the exterior building surface. Preferably, panel assemblies are mounted
from the bottom of the exterior building surface, and moves up. In this
way, the installer may make sure that each row is level relative to the
previous row installed. However, it is observed here that the finished
panel assemblies may be installed in any sequence.

A layer of isolation tape may be applied to the back of the aluminum
attachment clips. This prevents direct contact between the galvanized
steel sub-framing (L angles) and the corresponding aluminum
attachment clip. Thus, in turn, prevents galvanic action (electrolytic
decay of the aluminum) over time. Preferably, stainless steel self-drilling
screws are used to fasten the aluminum attachment clips to steel sub
framing. After determining a logical order of installation, each panel is be
p[plumbed and leveled to ensure a tight and concise fit from panel to
panel.
The individual panels may optionally be supported by a panel stiffener.
A finished ACP panel may be fabricated from a flat sheet of ACM using
different types of router and cutting bits. After the sheet of ACM has been
cut and routed, the sheet is then bent along the router lines to form the
finished panel. The newly-shaped panel is then assembled with the panel
perimeter strip using a panel rivet to complete the finished panel
assembly. A standard panel rivet for this application may be 3/16"
diameter.
There are various methods to accomplish the routing and cutting
process:
Method 1: Handheld router (not shown): A handheld router is used more
often when reworking a panel to a different size. This method requires
the simplest tool set up, but is the most labour-intensive method of

fabrication due to the lengthy time for setup and layout of each different
panel.
Method 2: Vertical table saw (not shown): A vertical table saw can also
be used, both to cut and rout the panels. Custom "V" routing blades can
be purchased to rout the panels. Panel design is limited using the
vertical table saw in itself. Using it in combination with the hand held
router has its advantages, but it is still a costly way to manufacture
panels.
Method 3: CNC-Machine (not shown): The computer numerically
controlled (CNC) machine is a complete and concise way to manufacture
panels. Once the panel has been designed by a CAD operator it is then
sent directly to the machine. This machine has been found to be very
useful and economical for manufacturing panels. This is the applicants'
preferred method for cutting and routing panels.
A method for installing panels to an exterior wall of a building is
provided. The method uses an extruded aluminum (or other metal) panel
attachment system for fastening a plurality of panels to a building
surface. The system's strength is enhanced by the use of an extruded
perimeter frame design which, with attachment clips, carries the dead
load for the various panels.

The system is designed to be in accordance with the rain screen
principle. This means that the system is designed so that a wall cavity
formed under the individual panels is vented, resulting in a pressure
equalized system. Controlled moisture drainage within the system,
coupled with this equalized pressure, contributes to effective,
maintenance free construction.
The attachment system may be fabricated through an extrusion process.
The extrusion process begins with an aluminum billet, which is the
material from which the profiles are extruded. The billet must be
softened by heat prior to the extrusion process. The heated billet is
placed into an extrusion press, which represents a powerful hydraulic
device wherein a ram pushes a dummy block. The dummy block, in turn,
forces the softened metal through a precision opening, known as a die.
The die produces the required shapes.
The extruded parts are cut to specific lengths. The extruded parts may
have a milled or anodized finish. It is, of course, understood that the
system is not limited by the specific extrusion process or other method
by which the component parts may be manufactured.
The FIG 5 system includes a panel perimeter strip. The panel perimeter
strips are attached to at least two and preferably four side surfaces of
wall panels. More specifically, the panel perimeter strips reside within the
hollow portion of the wall panels along inside surfaces. The wall panels

are preferably fabricated from an Aluminum composite material, or ACM.
Rivets (not numbered) connecting the panel perimeter strips to the
panels.
It is noted that the panel perimeter strips may each be a single strip that
extends substantially along the length of a side surface. Alternatively,
each panel perimeter strip may comprise one or smaller lengths or
segments. They only criterion is that the wall panel be adequately
supported once all panel perimeter strips are installed.
The system also includes an attachment long running profile. FIG1(a)
and l(b)provides a cross-sectional view of an illustrative profile. The
attachment profile has a central fastening surface, and a pair of
integrally formed wing members. Each wing member extends outwardly
from the central fastening surface in a substantially symmetrical
manner. The term "symmetrical" does not mean that wing members are
identical; rather, it means that the two wing members have substantially
similar dimensions and are arranged so that panels may be hung from
the attachment clip on either side, and in any sequence.
FIG 2(a) and 2(b) provides another cross-sectional view of an attachment
profile. In the figure each wing member of the attachment clip is received
by an opposing panel perimeter strip. Thus, the panel perimeter strips
are. designed to fit together with the wing members of the ALPL/P/112.

To install the panel system, sub-framing may be constructed. Preferably,
the sub framing comprises two back-to-back galvanized steel "L" angles.
Figure is an enlarged cross-sectional view showing the system of above
figure. In FIG 3, two "L" angles are seen. The L-angles allow the installer
to level the substrate in all three axes before installation of panels.
Preferably, stainless steel screws are used to connect the L-angles to the
building surface. Further, the L-angles themselves may be connected
through stainless steel screws.
The sub-framing is typically installed horizontally at each horizontal
joint. It can be seen that a series of finished ACM panel assemblies have
been mounted onto the exterior building surface. Preferably, panel
assemblies are mounted from the bottom of the exterior building surface,
and moves up. In this way, the installer may make sure that each row is
level relative to the previous row installed. However, it is observed here
that the finished panel assemblies may be installed in any sequence or
direction.
This aspect of the inventions deserves further discussion. As can be seen
in FIG 4(a) the L-angle brackets have been placed along the exterior
building surface in horizontal rows. The finished panel assemblies may
be secured to the brackets from left-to-right, from right-to-left, or even
out of order provided the correct spacing is maintained. Similarly, FIG 4
(b) the L-angle brackets may be placed along the exterior building surface
in vertical rows. The finished panel assemblies may then be secured to

the brackets from bottom-to-top, from top-to-bottom, or out of order
provided the correct spacing is maintained.
A layer of isolation tape may be applied to the back of the aluminum
attachment clips. This prevents direct contact between the galvanized
steel sub-framing (L angles) and the corresponding aluminum
attachment clip. Thus, in turn, prevents galvanic action (electrolytic
decay of the aluminum) over time. Preferably, stainless steel self-drilling
screws are used to fasten the aluminum attachment clips to steel sub
framing. After determining a logical order of installation, each panel is be
plumbed and leveled to ensure a tight and concise fit from panel to
panel.
The individual panels may optionally be supported by a panel stiffener.
Such a panel stiffener is desirable on large-sized panels. The panel
r,stiffeners may be used to prevent the popping or "oil canning" of the
finished panel assemblies. As the individual panels heat up, the panels
may expand and make a popping sound. The stiffeners reinforce the
panels to reduce this effect.
Panel stiffeners may be provided in different sizes depending on the wind
pressures to which the panels will be exposed. A larger width panel
stiffener may be advantageous where there are greater wind loads on the
attachment system or if less deflection on the individual panels is

desired. It will be appreciated that the construction of the panels
themselves also provides a basic level of rigidity, and stiffeners are not
necessarily required.
The attachment system also includes an infill strip. An infill strip is
shown in the cross-sectional views of below figure. The infill strip is
preferably cut to a width of approximately 1¼" (32 mm) for a ½" (13 mm)
joint. The infill strip replaces the conventional caulk joint, giving the
panel system a clean, maintenance free appearance. The infill strip also
is used to hide the fasteners for the attachment clip.
Each attachment clips is designed so as to interlock with a pair of panel
perimeter strips while holding an infill strip securely in place.
As we know ACM consists of a core of low density polyethylene
sandwiched between two sheets of aluminum (each approximately 0.5
mm thick). The finish face of the aluminum sheets is coated with a poly
vinylidene fluoride coating. The inner aluminum layer is typically coated
with chrome or polyester coatings. The standard thickness of the panel is
5/32" (4 mm) but thickness may range from ⅛" (3 mm) to ¼" (6 mm),
depending on customer preference or structural requirements.
By using proposed technique for Aluminum Composite panel silicon
usage in grove for blockage will be eliminated.

A finished ACM may be fabricated from a flat sheet of using different
types of router and cutting, After the sheet of ACM has been cut and
routed, the sheet is then bent along the router lines to form the finished
panel. The newly-shaped panel is then assembled with the panel
perimeter strip using a panel rivet to complete the finished panel
assembly. A standard panel rivet for this application may be
3/16"diameter.
The above invention is hereinbefore described with reference to the given
diagrams, methods and ongoing description

Claims
1. A pressure equalized rain screen Aluminum composite panel
system comprising selective extruded metal, angles, brackets in a
cladding wall system wherein the Aluminum profiles are
a. ALPL/P/ 111 extruded Aluminum profile.
b. ALPL/P/112 extruded Aluminum profile.
2. A pressure equalized rain screen Aluminum composite panel
system comprising a primary support comprising
a. Plurality of spaced apart vertical support members secured
with respect to backing wall and adapted to support the load
of the cladding wall and transfer the same to said backing
wall and
b. Plurality of horizontal runners adapted to be supported on
said vertical support members to define vertically spaced
apart runners with the spacing there between the runners
based on the vertical dimension of the strip comprising said
external cladding wall
c. A long running ACP strip inserted in ALPL/P/112 to close the
grove which restrict entry of air, dust, water or any foreign
particles

d. Even if any particle enters it will be flush out from cavity.
e. This system maintain equal air pressure inside and outside
and in between grooves
3. The pressure equalised rain screen system as claimed in claim 1
wherein the installation sub framing is contracted preferably sub
framing comprises two back to back galvanized "L" angles, fastened
to form "Z" assembly
4. The pressure equalised rain screen system as claimed in claim 1
wherein the individual panels may optionally be supported by a
panel stiffener
5. The pressure equalised rain screen system as claimed in claim 1
wherein the systems strength is enhanced by the use of an
extruded perimeter frame design carrying load for various panels
with attachment clips
6. The pressure equalised rain screen system as claimed in claim 1
wherein one or more rivets are present to connect the side surface
of the respective wall panel to a receiving member of a panel
perimeter strip

7. An method for pressure equalized rain screen Aluminum composite
panel installation system comprising steps of installation wherein
the wall panel has an exterior surface and at least two side surfaces
bent inwardly at an edge
8. The method as claimed in claim 5 wherein it also include an infill
strip into the slot of the first panel perimeter
9. The pressure equalised rain screen Aluminum composite panel
system substantially as herein described and illustrated in the
accompanying drawings and method
10.The method for pressure equalized rain screen Aluminum
composite panel installation system substantially as herein
described and illustrated in the figures of accompanying drawing
and method