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Патент USA US2129497

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Sept. 6, 1938.
Filed Dec. .20, 1957
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Patented Sept. 6, 1938
Erwin A. Horn, Seattle, Wash., assignor to I. F.
Laucks, Seattle, Wash. ‘
Application December 20, 1937, Serial No. 180,890
Z Claims. (Cl. 2li-_15)
My invention relates to a method of forming the wedge is not everywhere equally tight. 'I'here
joints in paneled wall -structures and to the
product thereof. More particularly, the inven
tion relates to> an improved joint for paneled
5 walls including the feature of forming a longi
is also a tendency for panel edges to rise, or pop
tudinal recess of uniform cross section, having
joints does not seem to counteract this tendency.
The present invention solves these diniculties
boundary surfaces formed both in the support
by a new treatment which is free from these ob
ing framing member and in the edges of adja
cent wall panels and in amxing therein a spline f -jections ,and insures the maximum possible con
of the same cross section as the recess, the spline tact between the cooperating surfaces. Atten 10
being preferably adhesively united with all the tion is .directed to the accompanyingdrawing in
boundary surfaces and then dressed oiî flush with which:
Figure 1 is a perspective view with parts broken
the face surfaces of the panels to form a flush
away of a_ previously grooved supporting stud
ToA the accomplishment of the foregoing and and two surface- panels meeting thereon with
related ends, the invention, then comprises the their meeting edges located above the groove.
Figure 2 is a view similar' to Figure 1, lbut
features hereinafter fully described, and particu
showing _the remainder of the spline'groove cut
larly pointe-d out in the claims, the following de
in the edges of panels meeting above the groove.
scription setting forth in detail certain illustra
Figure 3 is a similar view to Figure 1, showing
tive embodiments of the invention, these being
indicative, however, of but few of the various the spline secured in place and projecting some
ways, in which the principle of the invention may what beyond the surfaces of the panels.
Figure 4 shows a similar view but with the
be employed.
The extensiveluse of plywood and artificial spline dressed flush with the panel surfaces. _ ,
Figures 5, 6, '7, 8 and 9 show, in perspective, 25
boards in constructing paneled walls has preend portions of some of the various types of
sented a troublesome problem in- producing satis
factory flush joints at the junction of the panels. I,splines which may be used;
A preferred form of the present invention em
There has been a marked tendency for cracks and
defects to develop along the joint, and, although ploys the following method as illustrated in Fig
various methods for forming panel joints have ures 1 to 4. Studs, as at I0, are provided as shown 30
been devised, none has been wholly satisfactory. with a groove I I cut straight and true. In erect
One such method has been to apply glue-to one ing the wall, the meeting edges of adjacent pan
of the adjacent panel edges and then butt it els I2 are so located as to come approximately
parallel to and over >the groove II. To form a
tightly `against its ma'te, sometimes with the ad
ditional feature of gluing the panel edges shown strong wall of superior quality it is preferable
down to the supporting stud. Another suggested but not essential that thepanels be glued to the
method has been to slightly space apart the face of the stud along `surfaces I3 and then
edges of- adjacent panels where they meet on nailed so that the holding power of the nails
the surface of a stud and then press in tightly acts as a retaining clamp to insure a good glue "
and glue in place .a thin wedge-shaped member joint. When the glue is set, a small hole of the 40
dressing the projecting portion off flush with the same diameter as. the width of groove II is
panel surface. Such methods have been found _ bored through the face of the panels into the
open to the rather serious objection that the groove in the stud. An electric router is then
used with a pilot >tip which iits the stud groove
edges of panels, as furnished by the panel manu
facturers, are not perfectly straight. Obviously, II and cutting bits which cut out the adjacent
if one of them is not quite straight, neither the panel edges to form surfaces indicated by the
butt joint _method nor the wedge arrangement reference‘numeral I4. The bits are arranged so
can give very perfect results. In neither case is that the cross section of the recess thus formed,
it possible to get a perfect glue joint from panel and previously formed, is exactly the same as the.
to panel along the entire surface of the abutting cross section of the spline member i5, or portion 50
panel edges, and in the case of the wedge method, thereof, which is secured in the completed groove.
the faces of the wedge member are only tight These spline members may take a variety of
to the panel edges at the outer surface and are forms, such, for example, as those shown in
necessarily loose within, and, owing to lack of Figures 5, 6, 7, 8, or 9, at I6, I1, I8, I9 and 29,
i. Ci
up slightly from the supporting stud particularly
where they are only held downfwith nails. The
aforementioned wedge method of forming the 5
55 complete parallelism of the adjacent panel edges,
with corresponding character of router bits. _ As
shown in Figures 3 and 4, the spline l5 is then
secured in the groove, preferably by gluing, and
after the glue is set, if a flush wall is desired,
as is usually the case, the projecting portion lia
oi' the spline is dressed smooth with the panel
surfaces. If desired, an ornamental spline hav
ing an outer surface which forms a batten may
be used and the projecting portion allowed to
remain. Figure 9 illustrates a spline of this
10 character.
Where it is used it is desirable to
provide glue on> the lower surface of the pro
jecting batten portions so that all the Contactin
surfaces are securely glued together.
Obviously many modifications may be _used
employing the principles of this invention, it be
ing essential, however, that the groove be formed
to an accurate cross 'section both in the abutting
panel edges and in the stud and that the spline
be an accurate ñt for the groove and strongly se
As here shown, the grooves are
20 cured in place.
preferably outwardly unrestricted so that the
splines may be applied by- direct movement to
ward the wall rather than having to be inserted
by a longitudinal movement as would be the case
25 if the grooves were undercut and the splines cor
respondingly shaped. Preferably all the boun
dary surfaces should be adhesively united so as
to produce the strongest and most durable joint.
Various methods may be used for forming the
30 spline groove. One method permits the use of
ordinary studs which are not previously grooved
and also the erection of panels fixed to the Wall
with the customary contacting butt joints. In
this case, when cutting the groove with the
router, a straight-edge guide is temporarily held
on the wall parallel with and a slight distance
to one side of the panel joint and the router
is provided with a collar which acts as a guide
by running against the straight edge while the
40 lower face of the collar which is smooth also
acts as a guide to regulate the depth to which
the spline groove is cut. In that case, the router
bit forms the entire groove, such as is shown in
Fig. 2, for example, for the spline, including
45 the portion which enters the face of the stlid, as
Well as the portion formed in the edges4 óf the
abutting panels. Other modified methods of
forming the groove will be apparent to any skilled
This method is very effective and useful for
the construction of paneled walls surfaced either
, with plywood or artificial boards.
In the pre
ferred form the important advantage is secured
of an adhesive union of all the cooperating sur
55 faces which handle the stresses towhich a panel
joint is subjected. No previous method, so far
as I am aware, secures this complete tying to
gether of all the elements. It is noted that the
form of spline joint shown, for example, in Fig.
2, securely ties the panel edges to the stud be
cause of the outwardly enlarging form of the
groove so that they cannot come loose from it
and also is not adversely affected by lack of com
plete straightness originally in the adjacent panel
The method is also convenient, inexpensive and
practical under present day conditions where the
majority of dwelling houses are built by con
tractors who make use of electric power operated
tools on the construction job. Under such condi
tions a small portable electric drill fitted with the
correct router bit, rapidly and accurately forms
the spline grooves, and with a supply of suitable
splines which can be cheaply prepared in any
well equipped woodworking shop, an inexpensive
and highly effective solution of the panel jomt
problem is provided.
Othe modes of applying the principle of the 20
invention may be employed, change being made
as regards the details described, provided the
features-stated in any of the following claims,
or the equivalent of such, be employed.
I claim:
1. Wall structure of wood or the like compris
ing facing panels having spaced-apartv edges, a
common supporting framing member behind said
panels and lapping the adjacent margins of the
latter, said margins being inthe same plane, 30
means securing said margins to said member,
said member having a recess between said panel
edges so that an- outwardly unrestricted groove
of uniform cross-section is provided having boun
dary surfaces including the lateral walls of said
recess and the panel edges, and a spline Secured
in said groove and filling the same cross-section
ally, said spline having an exposed front surface
forming a part of the face of the wall structure.
2. Wall structure of Wood or the like compris 40
ing facing panels having spaced-apart edges, a
common supporting framing member behind said
panels' and lapping the adjacent margins of the
latter, said margins being in the same plane,
means securing said margins to said member,
said member having a recess between-said panel
edges so that an outwardly unrestricted groove
of uniform cross-section is provided having
boundary surfaces including the lateral walls of
said recess and the panel edges, and a spline in
said groove filling the same cross-sectionally, 50
said spline'being secured in said groove by ad
hesive union with all the boundary surfaces
of the latter and having an exposed front sur
face forming a part of the face of the wall struc
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