Note: Descriptions are shown in the official language in which they were submitted.
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Title
SNAP-TOGETHER WINDOW FRAME
Scope of the Invention
[0001] This invention relates to frames and, more particularly, to
window frames which
seal against door surfaces as to retain a thin panel such as a glass pane
within an opening in a
door.
Background of the Invention
[0002] Openings are known to be provided through walls and doors within
which
windows are provided. For example, in garage doors and exterior doors, a
window opening
is generally cut or pre-formed through the door where a window is desired.
Insertion of a
glass window pane into the window openings often involves providing an
interior half frame
and an exterior half frame which are secured to each side of the door with
horizontally
extending screws retaining the glass pane for the window between the half
frames within the
window opening.
[0003] Known such systems for securing glass panes in window openings of
doors suffer
a number of disadvantages including requiring difficult and expensive
installation by reason
of use of the screws and providing unsightly appearances due to the visibility
of heads of the
screws.
Summary of the Invention
[0004] To at least partially overcome these disadvantages of previously
known devices,
the present invention provides a window frame system in which opposed half
frames are
secured together without the use of threaded fasteners.
[0005] The present invention in one aspect provides a window frame
assembly to secure
a glass pane within a window opening in a door slab. The assembly preferably
includes two
identical frame halves carrying bosses on which modular clip members are
secure. The clip
members each carry a male post member and a female socket member. Each clip
member on
a half frame engages a corresponding clip member on the other half frame with
their female
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and male socket members engaging the outer surface of the clip member carrying
a key
member complementary to the keying member.
[0006] In one aspect, the present invention provides a window frame
comprising:
[0007] a first frame half comprising an elongate first frame member,
[0008] a second frame half comprising an elongate second frame member,
[0009] each frame member having an inner surface and an outer surface,
[0010] each frame member having an elongate inwardly directed first clamp
surface
extending along a first lateral edge of the inner surface adapted for
engagement with a first
panel and an elongate inwardly directed second clamp surface extending along a
second
lateral edge of the inner surface adapted for engagement with a second panel,
[0011] the frame members removable coupled together with:
(a) the inner surfaces in opposition to each other,
(b) the inner clamp surface of each frame member spaced a first distance apart
from the inner clamp surface of the other frame member and extending parallel
to the inner
clamp surface of the other frame member, and
(c) the outer clamp surface of each frame member spaced a second distance
apart
from the outer clamp surface of the other frame member and extending parallel
to the outer
clamp surface of the other frame member,
[0012] each of the first frame half and the second frame half having on
their inner
surfaces a plurality of identical locating bosses, the bosses evenly spaced
longitudinally
along the frame members,
[0013] each locating boss carrying a keying member,
[0014] a plurality of identical modular clip members,
[0015] each clip member having an inner surface and an outer surface,
[0016] the outer surface of the clip member including a key member
complementary to
the keying member,
[0017] each clip member fixedly secured to a respective one of the
locating bosses with
the keying member engaging the key member to locate the clip member in the
orientated
position,
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[0018] the outer surface of each clip member carrying a female
socket member and a
male post member,
[0019] the first frame member secured to the second frame member by
each clip member
on each locating boss on the first frame member being coupled to a respective
clip member
secured to a locating boss on the second frame member to form a paired
connection in which
the outer surface of each clip member of each paired connection in is
opposition to the outer
surface of each other clip member of each paired connection with the male post
member of
each clip member of each paired connection frictionally received in frictional
engagement in
the female socket member of each other clip member of each paired connection.
[0020] In another aspect, the present invention provides a window
frame comprising:
[0021] a first frame half comprising an elongate first frame
member,
[0022] a second frame half comprising an elongate second frame
member,
[0023] each frame member having an inner surface and an outer
surface,
[0024] each frame member having an elongate inwardly directed first
clamp surface
extending along a first lateral edge of the inner surface adapted for
engagement with a first
panel and an elongate inwardly directed second clamp surface extending along a
second
lateral edge of the inner surface adapted for engagement with a second panel,
[0025] each of the first frame half and the second frame half
having on their inner
surfaces a plurality of identical locating bosses, the bosses evenly spaced
longitudinally
along the frame members,
[0026] each locating boss carrying a keying member,
[0027] a plurality of identical modular clip members,
[0028] each clip member having an inner surface and an outer
surface,
[0029] the outer surface of the clip member including a key member
complementary to
the keying member,
[0030] each clip member fixedly secured to a respective one of the
locating bosses with
the keying member engaging the key member to locate the clip member in an
orientated
position,
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[0031] the outer surface of each clip member carrying a female
socket member and a
male post member,
[0032] the first frame member secured to the second frame member by
each clip member
on each locating boss on the first frame member being coupled to a respective
clip member
secured to a locating boss on the second frame member to form a paired
connection in which
the outer surface of each clip member of each paired connection in is
opposition to the outer
surface of each other clip member of each paired connection with the male post
member of
each clip member of each paired connection frictionally received in frictional
engagement in
the female socket member of each other clip member of each paired connection.
Brief Description of the Drawings
[0033] Further aspects and advantages of the present invention will
become apparent
from the following description together with the drawings in which:
[0034] Figure 1 is a perspective view of an entry door having
panels secured thereto in
accordance with a window framing system of the present invention;
[0035] Figure 2 is a front view of a garage door including glass
window panes secured to
the door in accordance with the window framing system of the present
invention;
[0036] Figure 3 is an exploded, schematic partial pictorial view of
the door slab of the
upper panel of the garage door shown in Figure 2 showing the upper right hand
window
opening, the window pane and the two half frame members;
[0037] Figure 4 is a top perspective view of the two half frames
showing details of their
interior surfaces;
[0038] Figure 5 is an enlarged top view of a section of the half
frame shown in Figure 4;
[0039] Figure 6 is an enlarged pictorial view of the upper right
corner of the half frame
shown in Figure 4;
[0040] Figure 7 is a bottom pictorial view of a clip member in
accordance with the
invention;
[0041] Figure 8 is a bottom view of the clip member of Figure 7;
[0042] Figure 9 is a front view of the clip of Figure 7;
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[0043] Figure 10 is a right end view of the clip member of Figure 7;
[0044] Figure 11 is a top view of the frame clip in Figure 10;
[0045] Figure 12 is a cross-sectional end view along section line A-A' in
Figure 11;
[0046] Figure 13 is a cross-sectional end view along section line B-B' in
Figure 11;
[0047] Figure 14 is a cross-sectional side view along section line C-C' in
Figure 11;
[0048] Figure 15 is a schematic partially exploded pictorial view of a
window frame
structure showing short lengths of two opposed frame members of each half
frame shown in
Figure 4 cross-sectioned at their ends and a pair of opposing clip members
shown in Figure 7
in relation to the pair of frame members;
[0049] Figure 16 is a view the same as Figure 15 but showing both clip
members secured
to their respective frame members;
[0050] Figure 17 is a view the same as Figure 16 but showing each clip
member coupled
to the other clip member;
[0051] Figure 18 is a side view of the window frame structure as shown in
Figure 17;
[0052] Figure 19 is an end view of the window frame structure shown in
Figure 17; and
[0053] Figure 20 is a cross-sectional side view along section line D-D' in
Figure 19.
Detailed Description of the Drawings
[0054] Figure 1 shows an entrance door 10 having a door slab 11 with a
plurality of
recessed panels 12 secured to the door slab 11 by half frames 20.
[0055] Figure 2 is a front view of a garage door 10 formed of four
horizontally extending
door slabs 11. A series of recessed panels 12 are coupled to each door slab 11
by half frames
20. In each of the doors 10 in Figures 1 and 2, the uppermost recessed panels
12 comprise a
pane of glass or plastic.
[0056] Reference is made to Figure 3 which is a schematic illustration of
the upper right
hand portion of the garage door 10 of Figure 2 showing the construction of a
window 16. As
seen in Figure 3, the door slab 11 has a rectangular window opening 17 formed
therethrough.
A rectangular glass window panel 12 is sized to fit within the opening 17. An
exterior outer
half frame 20 is provided on the outer side 18 of the door slab 11 and an
inner half frame 30
is provided on the inner side 19 of the door slab 11. In Figure 3, each of the
outer half frame
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20 and inner half frame 30 are only schematically shown and the particular
elements used to
couple the two half frames together are not shown.
[0057] The outer half frame 20 is formed from four elongate first frame
members 22, 24,
26 and 28 joined together at their ends to form the rectangular outer half
frame 20. The inner
half frame 30 is similarly formed from four elongate second frame members 32,
34, 36 and
38 also joined together to form a rectangle which is of identical dimensions
to the rectangle
of the outer half frame 20.
[0058] Reference is made to Figure 19 showing a cross-sectional view of the
door slab 11
and the window panel 12 in Figure 2 along section line 4-4' and showing each
of the first
frame member 28 and second frame member 38 in cross-section. As can be seen,
each of
these frame members has an inner surface 40 and outer surface 41. The inner
surfaces 40 and
the outer surfaces 41 of the first frame member 28 and the second frame member
38 are
mirror images of each other along a door center plane X-X' in Figure 19. Each
of the frame
members 28 and 38 is elongated extending along a longitudinal and has a first
lateral edge 43
and a second lateral edge 45 at the junction of the inner surface 40 and the
outer surface 41 as
seen in Figure 19. The first lateral edge 43 and the second lateral edge are
parallel to each
other and to a longitudinal of each frame member. The inner surface 40 of each
frame
member includes an elongate inwardly directed first clamp surface 42 which
extends along
the first lateral edge 43 for clamping engagement with the window panel 12.
The inner
surface 40 of each frame member includes an elongate inwardly directed second
clamp
surface 44 extending along the second lateral edge 45 for clamping engagement
with the door
slab 11.
[0059] A coupling mechanism 46 is provided on the inner surface 40 of each
of the frame
member to couple the frame members together. In a coupled arrangement 46 as
illustrated,
for example in Figure 19, the frame members 28 and 38 are removably coupled
together with
(a) the inner surface 40 of the frame member 28 in opposition to the inner
surface 40 of the
other opposite frame member 38, (b) the inner clamp surface 42 of the frame
member 28
spaced a first distance D1 apart from the inner clamp surface of the other
frame member 38
and extending parallel to the inner clamp surface 42 of the other frame member
38, and (c)
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the outer clamp surface 44 of the frame member 28 spaced a second distance D2
apart from
the outer clamp surface 44 of the other frame member 38 and extending parallel
to the outer
clamp surface 44 of the other frame member 38. In Figure 19, the distance D1
is equal to the
thickness of the window panel 12 and a distance D2 is equal to the thickness
of the door slab
11. As can be seen, the first clamp surface 42 of the frame member 28 engages
an outer
surface 46 of the window panel 12 and the first clamp surface 42 of the inner
frame member
38 engages an inner surface 47 of the window panel 12. Similarly, the second
clamp surface
44 of the outer frame member 28 engages the outer side 18 of the door slab 11
and the
second clamp surface 44 of the inner frame member 38 engages the inner side 19
of the door
slab 11. A slotway 48 is provided extending inwardly from the first clamp
surface 42 within
which a resilient gasket member 49 is provided to be compressed between the
bracket
member 28 and the outer side 18 of the door slab 11 to provide an improved
seal. Similar
such slots 48 are provided in the other first clamp surface 42 and the two
second clamp
surfaces 44, however, for ease of illustration, gaskets are not shown in these
other slots.
[0060]
Reference is made to Figure 4 which is a pictorial view of the outer half
frame 20
and the inner half frame 30 showing the inner surface 40 of each of their
frame members. On
the interior surface 40 between the first clamp surface 42 and the second
clamp surface 44, a
plurality of locating bosses 50 are provided spaced longitudinally from each
other on each of
the frame members. As best seen in Figures 5 and 6, each locating boss 50
provides a planar
support surface 51. The support surfaces 51 on each of the location bosses 50
are disposed in
a common plane which is parallel to a plane containing the first clamp
surfaces 42. Each
locating boss 50 also carries a keying lug member 52 which extends inwardly
farther than the
support surface 51. The keying lug member has a flat outer side surface 53 and
the flat inner
side surface 54 is disposed parallel to the outer side surface 53. Side
surfaces 53 and 54 end
at a first end surface 55 which extends between the side surfaces 53 and 54
normal to the side
surfaces 53 and 54. The side surfaces 53 and 54 end at a second rounded end
surface 56.
The end surface 55 extends downwardly on the keying lug member 52 to the
support surface
51. A blind bore 58 extends from the support surface 51 into the locating boss
50 normal to
the support surface 51 to a blind inner end 59 as seen in Figure 20. Each
locating lug 50
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extends along a longitudinal indicated as Z-Z' in Figure 5, which is parallel
to each side edge
43 and 45 of each frame member.
[0061] Reference is made to Figures 7 to 14 which illustrate a
modular clip member 60.
One clip member 60 is to be secured to each of the bosses 50. The clip member
60
comprises a generally rectangular base 61 with an outer surface 62 and an
inner surface 63
joined by a male end 64, a female end 65, a first side 66 and a second side
67.
[0062] The clip member 60 has a socket-forming female member 68
extending inwardly
from the inner surface 63 proximate the female end 64. The clip member 60 has
a post-
forming male member 70 extending inwardly from the inner surface 63 proximate
the male
end 65. A central opening 72 extends through the base 61 between the outer
surface 62 and
the inner surface 63. The outer surface 62 has formed therein a key recess 71
with a first side
locating surface 75 and a second side locating surface 76. The side locating
surfaces 75 and
76 are disposed parallel to each other and parallel to a central longitudinal
of the clip member
indicated as Y-Y' extending through the base 61. The key recess 71 has an
inner end surface
77 proximate to the opening 72 and an outer end surface 78 proximate to the
male end 65.
The key recess 71 is sized so as to receive a keying lug member 52 on a
locating boss 50 with
side locating surfaces 75 and 76 of the key recess 71 to engage the flat side
surfaces 53 and
54 on the keying lug member 52 to orient the longitudinal of the clip member
60 aligned with
the longitudinal of the locating boss 50 and thereby with its respective frame
member. The
outer surface 62 of the clip member 60 is disposed in a flat plane. The outer
surface 62 of the
clip member 60 is adapted to engage and to be supported on the support surface
51 of a
locating boss 50 with the circular opening 72 of the clip member 60 coaxially
aligned with
the bore 58 of the boss 50 permitting a fastener 80 to extend through the clip
member 60 to
secure the clip member 60 to a boss 50 as, for example, illustrated in each of
Figures 15 to
20. As can be best seen in the vertical cross-section of Figure 20, each clip
member 60 is
secured to a respective boss 50 with the outer surface 62 of the clip member
60 supported on
the support surface 51 of the boss 50 and with the keying lug member 52 of the
boss 50
received in the key recess 71 of the clip member 60 to longitudinally align
the clip member
60 relative to the boss 50. The fastener 80 extends coaxially through the
opening 72 and into
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the bore 58 so as to coaxially locate the opening 72 of the clip member 60
with the bore 58 of
the boss 50.
[0063] As seen in Figures 12 and 14, the socket-forming female member 68
comprises a
cylindrical tube 81 which extends inwardly from the inner surface 63 disposed
about an axis
82 which is perpendicular to the outer surface 62 and passes through the
longitudinal center
line C-C' of the fastener clip 60. A socket 83 is formed within the tube 81
with the socket
having a cylindrical inner surface 84. The socket 83 is open inwardly at an
entry opening 85.
Proximate the entry opening 85, an annular radially inwardly extending hook
member 86 is
provided to extend radially inwardly relative to the surface 84. The hook
member 86 has an
annular bevelled cam surface 87 which is disposed at an angle to extend
axially inwardly
away from the base 61 as it extends radially inwardly. The hook member 86 has
annular
catch shoulder 88 disposed in a plane substantially normal to the axis 82.
[0064] The post-forming male member 70 as seen in cross-section in Figures
13 and 14
as coaxial about an axis 91 which is parallel to the axis 82 of the female
member 68 and also
intersects with the longitudinal center line C-C' of the clip member 60. The
male member 70
extends about its axis 91 normal to the plane of the outer surface 62 of the
base 61. The male
member 70 has a generally cylindrical ribbed portion 92 and a head portion 93.
The head
portion 93 is frustoconical tapering from the ribbed portion 92 to a central
apex 94 and
providing entry camming surfaces 85 circumferentially about the head portion
83. The
ribbed portion 92 carries a number of axially spaced disk-like annular catch
members 96.
Each catch member 96 includes an annular cam surface 97 on the side of each
catch rib 96
away from the base 61 which cam surface 97 extends axially inwardly toward the
base 61 as
it extends radially outwardly. Each catch member 96 includes an annular catch
shoulder 98
which is disposed in a plane generally perpendicular to the male axis 91.
[0065] Each modular clip member 60 is adapted to couple with an identical
modular clip
member 60 in a manner as illustrated in Figures 15 to 20 with male member 70
of each clip
member 60 to be received in the female member 68 of the other clip member 60.
Thus, as
seen in each of Figures 17 to 20 and notably in Figure 20, two clip members 60
are shown as
coupled together with the male member 70 of the upper clip 60 received in the
female
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member 68 of the lower clip 60, and the male member 70 of the lower clip
member 60
received in the female member 68 of the upper clip 60. The male member 70 is
adapted to
coaxially slide into the socket 83 of the female member 68. Engagement of the
camming
surfaces 85 of the head portion 83 of the male member 70 assists during
initial insertion of
coaxial alignment of the male member 70 and the female member 68. By applying
forces
which urges the male member 70 coaxially into the female member 68, one of the
annular
catch members 96 on the male member engage the annular hook member 86 on the
female
member 68. Engagement between the cam surfaces 87 and 97 of each that provides
for
relative radial deflection of one or both of the hook member 86 and the catch
members 96
permitting the annular catch members 96 to successively be forced past the
hook member 86.
Withdrawal of the male member 70 from the female member 68 is substantially is
prevented
by engagement between the catch shoulder 88 of the female member 68 and the
catch
shoulder of one of the annular catch members 96 of the male member 70. With
sufficient
force applied to the male member 70 to urge it coaxially into the female
member 68, the male
member 70 moves into the socket 83 in a ratcheting-type manner as successive
of the annular
catch members 96 on the male member 70 are moved past the hook member 86.
[0066] In accordance with the present invention, each half frame 20
and 30 as shown in
Figures 4 to 6 is preferably manufactured by molding as from fibreglass. One
clip member
60 is secured to each locating boss 50 on each of the two half frame members
20 and 30.
Each clip member 60 is secured to its respective boss 50 in an appropriate
orientation on the
boss by reason of each keying lug member 52 being received within the key
recess 71 of the
clip member 60 and the fastener 80 extending coaxially through the opening 72
of the clip
member 60 into the bore 58 of the boss 50 so as to urge the flat outer surface
62 of the clip
member 60 into engagement with the flat surface 51 on the boss 50.
Subsequently, with a
clip member 60 secured to each of the boss 50 in the correct longitudinal
orientation, the two
half frames 20 and 30 are then placed into opposition, one on either side of
the door slab 11
about the window opening 17 with the window panel 12 in the window opening
between the
frame halves. Each clip member 60 carried on a boss 50 on the half frame 20 is
aligned with
an opposed clip member 60 on the half frame 30 with each clip member 60 having
its male
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member 70 engage into a female member 68 of the opposed clip member 60. The
half
frames 20 and 30 are forcibly pushed together to force the male member 70 into
the female
member 68 frictionally engaging each of the door slab 11 and the window panel
12 between
the frame halves.
[0067] Each of the half frames 20 and 30 is preferably identical as seen
in Figure 4 with
the bosses 50 longitudinally orientated thereon such that when the two half
frame members
20 and 30 are placed in opposition, as schematically indicated by the travel
lines 101, 102,
104 and 104 showing the relative movement of the frame half 30 so as to
overlie and align
above the frame half 20, the bosses 50 carrying the clip members 60 to be
suitably
longitudinally orientated that for each clip member 60 there is an opposing
clip member 60
whose male member 70 is adapted to engage into the female member 68. In Figure
4, the
two half frames 20 and 30 are identical and the bosses 50 on each frame member
are to be
disposed symmetrically relative a mid-point centered along the longitudinal of
each frame.
For example, on frame member 28, a mid-point is the bosses center line W-W'
and the two
bosses 50 on the frame member 28 are equally spaced relative this center line.
Similarly, on
frame member 26, the three bosses 50 are symmetrically located about a center
line V-V'.
For ease of use, the frame member 24 has bosses 50 identically spaced as on
frame member
26 and the frame member 28 has bosses 50 identically spaced as on frame member
26.
Either frame half can be rotated 180 and still be compatible with the other
frame half. As
seen in Figure 4, each boss 50 with its angled end 100 directed in the same
direction about a
central point 110 of the half frame, counterclockwise about the center point
110 as seen in
Figure 4.
100681 Each locating boss 50 is directional in the sense that it has
locating lug 52 at one
male end and an angled female end 100 at the other end. A clip member 60
coupled to the
locating member 50 is longitudinally oriented directionally with the locating
boss 50 with the
male end 65 proximate the lug 52 and the female end 68 proximate the angled
female end
100 of the locating boss 50. Each locating boss is disposed aligned with the
longitudinal of
its respective frame member and suitably directionally oriented such that it
as indicated in
Figure 4 when the two frame halves are inverted and placed in opposition with
each other,
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each boss 50 is directionally orientated such that the clip member 60 which it
carries is
directionally opposite to the clip member 60 with which it is to couple.
100691 As seen in Figures 14 and 20, the circular opening 72 through the
clip member 60
includes an inner portion 120 of larger diameter than an outer portion 121. As
seen in Figure
20, the fastener 8 has an enlarged head 122 and a shank 123 with the head 122
sized to be
received within the inner portion 120 and the shank sized to be received
within the outer
portion 121.
[00701 Preferably, each clip member 60 is securely fastened to its
respective locating
boss 50 with the outer surface 62 of the clip member securely forced into the
support surface
51 of the locating boss 50, however, with some ability for the mounting clip
60 to slide
relative to the locating lug 50 on the support surface 51, longitudinally and
laterally side to
side. Such minor movement facilitates the coaxial alignment of the male
members 70 and
the female members 68 as they are urged together. As the opposed clip members
60 are
urged together from a generally axially aligned position as seen in Figure 16
towards a
position in Figure 17, the frustoconical entry camming surfaces 85 of the head
portion 93 of
the male member 70 engage with the annular bevelled cam surface 86 of the
entry opening
65 of the female member 68 to urge each of the clip members 60 to slide on the
support
surfaces 51 of their respective bosses 50 into positions in which the male
members 70 are
coaxially aligned with the female members 68. During assembly of a frame half
from a
position as shown in Figure 16 to a position shown in Figure 17, however, with
the frame
halves appropriately located relative to window opening 17 as seen in Figure 3
with the slab
11 and panel 12 appropriately oriented between the frame halves, one frame
half may be
urged into another frame half as by manually pushing or by applying forces as
by reasonable
blows as with a manual rubber mallet. The male members 70 enter the female
members 68
reducing the distance between the frame halves until the inner clamp surfaces
42 and the
other clamp surfaces 43 suitably engage and clamp therebetween the door slab
11 and the
window panel 12. The frame halves are to have a particular configuration
adapted for use
with a particular door slab 11 of a given thickness and a window panel 12 of
another given
thickness.
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[0071] Each frame half 20 and 30 is preferably molded as from a relatively
rigid material
such as fibreglass. While preferably each frame half 20 and 30 are identical,
this is not
necessary and the frame halves need not be identical. The clip members are
preferably
injection molded from a material which is substantially rigid yet may have
some resiliency.
Many suitable plastics and polymers are known to persons skilled in the art.
The fastener 80
is shown to be a threaded screw. Many other forms of fasteners such as rivets
and the like
may be utilized. In accordance with the present invention, the frame halves
can be fastened
together merely by urging the two frame halves together without the use of any
particular
tools. As the clip members 60 are retained together in frictional engagement,
if necessary,
the frame halves may be separated as, for example, by using a screwdriver or
other pry bar to
force the frame halves apart with sufficient strength to overcome the
engagement of the male
member 70 within the female member 68.
[0072] In the preferred embodiment, the male member carries a plurality of
annular catch
members 96 and the female member 68 carries a single annular hook member 86.
It is to be
appreciated that a plurality of such hook members could be provided on the
female member
68 and that merely one catch member 96 need be provided on the male member 70.
[00731 Referring to Figure 19, section line D-D' may be considered to be a
longitudinal
plane which includes the axis 82 of the female member, the axis 91 of the male
member, and
an axis 126 through the opening 72. This longitudinal plane includes the
longitudinal axis Y-
Y' of the clip member 60 and the longitudinal Z-Z' of each frame member and
its respective
boss 50. Figure 20 is effectively a cross-sectional view along this
longitudinal plane of the
frame members. Each of the first clamp surfaces 42 and the second clamp
surfaces 43 are
disposed in planes which are perpendicular to the longitudinal plane of each
frame member.
Each locating boss 50 is located longitudinally aligned and centered on the
longitudinal plane
with each locating boss 50 directionally oriented longitudinally of each frame
member within
the longitudinal plane. Each locating surface 51 is disposed in a plane which
is normal to the
longitudinal plane.
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,
[0074]
While the invention has been described with reference to preferred
embodiments,
many modifications and variations will now occur to persons skilled in the
art. For a
definition of the invention, reference is made to the following claims.
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