U.S. patent application number 09/790966 was filed with the patent office on 2001-10-25 for insulated channel seal for glass panes.
Invention is credited to Riegelman, Harry M..
Application Number | 20010032436 09/790966 |
Document ID | / |
Family ID | 26884333 |
Filed Date | 2001-10-25 |
United States Patent
Application |
20010032436 |
Kind Code |
A1 |
Riegelman, Harry M. |
October 25, 2001 |
Insulated channel seal for glass panes
Abstract
A spacer channel for a frame which separates window panes to
form an insulated window has a plurality of openings through a wall
of the channel that faces outward along the periphery of the frame
and glass sandwich. The openings are designed to prevent
significant passage of sealant from the outside of the channel to
the inside of the channel through the openings. This is done by the
cross sectional area of each opening being so small that it resists
viscous flow of the sealant through the opening, or by a cover over
the opening.
Inventors: |
Riegelman, Harry M.; (Fort
Worth, TX) |
Correspondence
Address: |
ROBERT A SEEMANN
89 EARL AVE
HAMDEN
CT
06514
US
|
Family ID: |
26884333 |
Appl. No.: |
09/790966 |
Filed: |
February 22, 2001 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
60188646 |
Mar 10, 2000 |
|
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Current U.S.
Class: |
52/786.13 ;
52/172; 52/717.02 |
Current CPC
Class: |
E06B 3/66323
20130101 |
Class at
Publication: |
52/786.13 ;
52/730.4; 52/172; 52/717.02 |
International
Class: |
E04C 002/54 |
Claims
What is claimed is:
1. A spacer channel for mounting between a first window pane having
a first edge and a second edge from a corner of the first pane, and
a second window pane, adjacent to said first edge for separating
the window panes to form a channel and pane sandwich insulated
window when said spacer channel is mounted between the panes, said
spacer channel comprising: a first elongate wall for facing the
first pane, a second elongate wall for facing the second pane, a
third elongate wall connected to the first and second walls, said
channel being configured so that said third elongate wall faces
outward along the periphery of the channel and pane sandwich when
said spacer channel is mounted between the panes extending along
the first and second edges, and a plurality of openings through
said third wall along the length of said third wall.
2. The spacer channel of claim 1 wherein said openings are made by
removing a substantial portion of the area of said third elongate
wall.
3. The spacer channel of claim 1 wherein the total cross sectional
area of said openings comprises 80 percent to 95 percent of the
cross sectional area of said third elongate wall.
4. The spacer channel of claim 1 further comprising a low thermal
conductivity strip covering said plurality of openings.
5. The spacer channel of claim 1 further comprising a sealant
extending over the first, second and third elongate walls of the
channel and covering said plurality of openings.
6. The spacer channel of claim 4 further comprising a sealant
extending over the first, second and third elongate walls of the
channel, covering said plurality of openings, and against said low
thermal conductivity strip.
7. The spacer channel of claim 4, further comprising a sealant
extending over the first and second elongate walls and said low
thermal conductivity strip.
8. The spacer channel of claim 5 further comprising the cross
sectional size of each of said plurality of openings being small
enough so that sealant cannot significantly enter the channel to
the area between the first and second elongate walls by way of the
openings.
9. In an insulated window assembly comprising a first pane, a
second pane, a spacer channel mounted between the first and second
panes for separating the panes to form a channel and pane sandwich
insulated window, said spacer channel comprising: a first elongate
wall facing said first pane, a second elongate wall facing said
second pane, a third elongate wall connected to the first and
second walls, facing outward along the periphery of the channel and
pane sandwich, and a plurality of openings through said third
elongate wall along the length of said third elongate wall.
10. The spacer channel of claim 9 wherein said openings are made by
removing a substantial portion of the area of said third elongate
wall.
11. The spacer channel of claim 9 wherein the total cross sectional
area of said openings comprises 80 percent to 95 percent of the
cross sectional area of said third elongate wall.
12. The spacer channel of claim 9 further comprising a low thermal
conductivity strip covering said plurality of openings.
13. The spacer channel of claim 9 further comprising a sealant
extending over the first, second and third elongate walls of the
channel and covering said plurality of openings.
14. The spacer channel of claim 12 further comprising a sealant
extending over the first, second and third elongate walls of the
channel, covering the plurality of openings, and against said low
thermal conductivity strip.
15. The spacer channel of claim 12 further comprising a sealant
extending over the first and second walls and said low thermal
conductivity strip.
16. The spacer channel of claim 13 further comprising the cross
sectional size of each of said plurality of openings being small
enough so that sealant cannot significantly enter the channel to
the area between the first and second elongate walls by way of the
openings.
17. In a spacer channel for a frame for separating window panes to
form a frame and glass sandwich insulated window, said spacer
channel comprising a plurality of openings through a first wall of
the spacer channel that faces outward along the periphery of the
frame and glass sandwich, the openings being spaced from each
other.
18. The spacer channel of claim 17 wherein the openings comprise 80
to 95 percent of the cross sectional area of said first wall of a
straight side of said sandwich.
19. The spacer channel of claim 17 further comprising a low thermal
conductivity strip covering said plurality of openings.
20. The spacer channel of claim 19 further comprising a sealant
extending over said plurality of openings and against said
strip.
21. The spacer channel of claim 17 further comprising the cross
sectional size of the openings being small enough so that a
predetermined sealant as it is applied cannot significantly enter
the channel from the outward side of said first wall by way of said
openings.
Description
[0001] This application claims benefit of U.S. Provisional
Application No. 60/188,646, filed Mar. 10, 2000
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The invention relates to insulated spacer frames for
parallel window panes, more specifically to thermally insulated
channel for the spacer frames.
[0004] 2. Description of the Prior Art
[0005] Farbstein in U.S. Pat. No. 5,424,111 patented Jun. 13, 1995
describes a pair of metal U shaped channels separated by a rigid
bar of insulating material that contains a moisture absorbent. Each
U channel encloses a side of the bar. The resulting split metal
longitudinal shell of the channel is made by casting the insulating
bar within a C shaped metal channel shell and after the bar is
hardened, cutting along the length of the channel completely
through the C channel shell to the insulating material.
SUMMARY OF THE INVENTION
[0006] It is one object of the invention to reduce thermal
conduction across a metal channel that forms the spacer frame for
mounting between glass panes of a thermal window.
[0007] A spacer channel for a frame which separates window panes to
form an insulated window has a plurality of openings spaced from
each other along the length of a straight portion of the channel.
The openings are through a wall of the channel that faces outward
along the periphery of the frame and glass sandwich when the frame
is between panes of glass. The openings are designed to prevent
significant passage of sealant from the outside of the channel to
the inside of the channel through the openings. This is done by (a)
the cross sectional area of each opening being so small that it
resists viscous flow of the sealant through the opening, or by (b)
a cover over the opening, or by (a)+(b).
[0008] In an insulated window assembly comprising a first pane, a
second pane, a spacer channel mounted between the first and second
panes for separating the panes to form a channel and pane sandwich
insulated window, the spacer comprises a first elongate wall facing
the first pane, a second elongate wall facing the second pane, a
third elongate wall connected to the first and second walls, facing
outward along the periphery of the channel and pane sandwich, and a
plurality of openings through the third elongate wall along the
length of the third elongate wall.
[0009] The total cross sectional area of the openings comprises 80
to 95 percent of the cross sectional area of the third elongate
wall.
[0010] In one arrangement the cross sectional size of each of the
plurality of openings is small enough so that sealant cannot
significantly enter the channel to the area between the first and
second elongate walls by way of the openings.
[0011] In another arrangement a low thermal conductivity strip
covers the plurality of openings, and a sealant extends over the
first, second and third elongate walls of the channel, covering the
plurality of openings, and against the thermal conductivity
strip.
[0012] In another arrangement a low thermal conductivity strip
covers the plurality of openings, and a sealant extends over the
first and second walls and the low thermal conductivity strip.
[0013] Other objects and advantages of the invention will become
apparent to persons skilled in the art from the ensuing
description.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order that the invention will be more fully comprehended,
it will now be described, by way of example, with reference to the
accompanying drawings, in which:
[0015] FIG. 1 is a perspective view of a portion of a channel of
the invention showing predominantly the outward and back walls of
the channel and a plurality of openings through the outward
wall.
[0016] FIG. 2 is a perspective view of the channel of FIG. 1
showing predominantly the inward and front walls of the channel and
a strip of material inside the channel that prevents passage of
sealant through the openings in the outward wall into the
channel.
[0017] FIG. 3 is a perspective view of the channel of FIG. 1
showing predominantly the outward and back walls, and a strip of
material outside the channel that prevents passage of sealant
through the openings in the outward wall into the channel.
[0018] FIG. 4 is a cross section of the channel of FIG. 2, viewed
at 4-4. Added is sealant, two glass panes, and desiccant
material.
[0019] FIG. 5 is a cross section of the channel of FIG. 2, viewed
at 5-5. Added is sealant, two glass panes, and desiccant
material.
[0020] FIG. 6 is a cross section of the channel of FIG. 3, viewed
at 6-6. Added is sealant, two glass panes, and desiccant
material.
[0021] FIG. 7 is a cross section of the channel of FIG. 3, viewed
at 7-7. Added is sealant, two glass panes, and desiccant
material.
[0022] FIG. 8 is a schematic view of the outward wall of a channel
of the invention showing a form of openings according to the
invention.
[0023] FIG. 9 is a schematic view of the outward wall of another
channel of the invention showing a form of openings according to
the invention.
[0024] FIG. 10 is a schematic view of the outward wall of another
channel of the invention showing a form of openings according to
the invention.
[0025] FIG. 11 is a schematic cross section view of another channel
of the invention showing penetration of sealant into openings in
the outer wall.
[0026] FIG. 12 is a schematic cross section view of another channel
of the invention.
[0027] FIG. 13 is a schematic cross section view of another channel
of the invention.
[0028] FIG. 14 is a schematic perspective view of a lower left
corner of a channel and pane sandwich of the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0029] Before explaining the invention in detail, it is to be
understood that the invention is not limited in its application to
the detail of construction and arrangement of parts illustrated in
the drawings since the invention is capable of other embodiments
and of being practiced or carried out in various ways. It is also
to be understood that the phraseology or terminology employed is
for the purpose of description only and not of limitation.
[0030] Referring to FIGS. 1, 2, 4, and 5, strip metal is stamped
and rolled to form C-channel 20. Openings 22 are formed through
outer wall 56 which faces outward 24 along the periphery of the
spacer frame and glass sandwich 34. This reduces the rate of heat
transfer across 36 outer wall 56, and therefore reduces the rate of
heat transfer between glass panes 30 by channel 20.
[0031] A strip 44 of material having stiffness and low thermal
conductivity such as a paper sheet or a plastic sheet is laid on
wall 56 over openings 22 inside channel 20 so that strip 44 seals
the openings.
[0032] Desiccant 62 is installed within channel 20. Strip 44
prevents passage of the desiccant out of the channel by way of
covered openings 22.
[0033] Semi-viscous sealant 50 is applied outside the channel to
outer wall 56 and vertical walls 32. Strip 44 prevents passage of
sealant 50 into the channel by way of covered openings 22.
[0034] Strip 44 is fastened to wall 56 inside channel 20 by
adhesive 66. The adhesive is of high strength to resist force from
semi-viscous sealant that is applied to the outside of the channel
to separate the strip from wall 56 by pushing the strip 44 away
from wall 56 inward into the channel as the sealant enters into
openings 22.
[0035] The adhesive is also designed to survive the high
temperature of sealant as it is applied on the channel, and to
survive ambient temperature extremes that the completed window
sandwich is likely to encounter. For example, hot melt butyl
sealant can be applied at a high temperature of 250 degrees F. The
adhesive is preferably designed to survive and stick from -20
degrees F. to 300 degrees F. and not to release gas or moisture
into the channel that would contaminate the space between the panes
of glass.
[0036] Preferably the adhesive is designed to prevent passage of
gas or liquid past the adhesive. The adhesive is also chemically
compatible with the sealant so that it is not weakened by chemical
constituents of the sealant.
[0037] The adhesive can be applied to the lateral borders 72 of the
strip, so that the adhesive will not come into contact with the
sealant at the middle region 74 of the strip so that the sealant is
in direct hermetically sealing contact with the strip.
[0038] The adhesive and strip are preferably impervious to gas and
moisture transfer. If the sealant forms a moisture and gas seal
over the openings after the sealant hardens, the strip does not
have to be impervious to gas and moisture.
[0039] The sealant can be applied after the adhesive cures.
Suitable adhesives include pressure sensitive contact, air-cure,
and epoxy materials.
[0040] The strip can be paper, plastic, metal, or other material
that meets the above performance descriptions.
[0041] V-cutout 38 is used to form a corner by folding of wall
56.
[0042] The strip can be slightly elastic if it crosses fold line 80
of the channel, so that the strip does not break when the corner is
folded.
[0043] The strip can be cut or be discontinuous at the fold line to
avoid tearing it when the channel is bent at the fold line to make
a comer of the spacer frame.
[0044] In FIGS. 3, 6, and 7, strip 44 is laid on wall 56 outside
channel 20 over openings 22 so that it seals the openings.
[0045] Strip 44 prevents passage of the desiccant out of the
channel by way of covered openings 22, and prevents passage of
sealant 50 into the channel by way of openings 22.
[0046] Preferably the openings comprise 80 to 95 percent of the
cross sectional area of the outer wall of the straight portion of
the channel, allowing for bend margin 84 on each side of fold line
80.
[0047] Preferably the openings do not have sharp corners, but are
curved around the circumference so that viscous sealant will flow
into contact with the entire edge of the circumference of the
opening. The openings can be any shape.
[0048] If the strip is not used to dam the hole against flow of the
sealant through the hole into the channel, the holes are at least
so small that the sealant cannot flow through the hole into the
channel, that is, the sealant is not lost into the channel when it
is applied to the outside of the channel. In that arrangement, the
opening could be about {fraction (1/16)} inch in diameter for
example, calculated according to the viscosity of the sealant.
[0049] FIGS. 8-10 show three different shapes of openings 86, 88,
and 90 respectively of channel outer walls 92, 94, and 96.
[0050] In FIG. 11, openings or holes 98 of channel 100 are designed
so that they are narrow enough to prevent significant flow of
viscous sealant 104 through each hole 98 into the channel.
[0051] The sealant only wells upward into the hole, and may extend
only slightly above the hole inner opening 108, but not
significantly into 110 the channel.
[0052] The invention comprises the outer wall of a window spacer
frame, and is not meant to be limited by the shape of the rest of
the frame stock.
[0053] FIGS. 12 and 13 show two, 112 and 118, of many frame stock
cross sections that can contain the invention. Each of the two
contains openings 124.
[0054] In FIG. 14, channel 20 is mounted between panes 130, 132
adjacent to edges 138, 140 from corner 146 of pane 130 and edges
142, 144 from corner 148 of pane 132. Semi-viscous butyl sealant 50
is shown between the panes and the channel, but is omitted from the
drawing over outward side 152 of outer wall 56 of the channel for
clarity of viewing. Butyl sealant 50 between elongate wall 32 of
channel 20 and pane 130 seen through pane 130 is shown in dashed
lines. Low thermal conductivity strip 44 seals openings 22 against
passage of sealant from outward side 152 through openings 22 into
the space between vertical walls 32.
[0055] Although the present invention has been described with
respect to details of certain embodiments thereof, it is not
intended that such details be limitations upon the scope of the
invention. It will be obvious to those skilled in the art that
various modifications and substitutions may be made without
departing from the spirit and scope of the invention as set forth
in the following claims.
* * * * *