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Патент USA US2108350

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Patented Feb. 15, 1938
VUNITED As'mint'.:s
2.108.350' j
Karl Roth, Terre Haute, Ind. 'Y Y" " ’1
Application July >1.6, 193.7, 1seria-1N41f1f5a955
`'Ill‘his invention relates to metal roofing `and
grooves I 3,‘providing the sheet with major and
has for a primary object the provision of >a metalY
minor .corrugatìonsf
sheet unit which may be used in multiple in
laying roofs, the main feature being -that each
Referring to‘Fig. 2,` sheet >Ill when laid in the
position indicated, has> on its. right hand side a
tail piece I4, extending outwardly from the lower
end ¿of -the outer ridge II in the plane including
5v unit may be originally coated in a flat sheet and
then rolled or otherwise formed into such shape
that there will be no ,sharp bends but only
smooth, rounded corners, whereby the coating
may remain firmly attached to the lsheet With
lol out vdanger of its peeling at the bends or 4curves
as has been heretofore encountered in roofing
units of the nature herein employed.
A still further'important advantage of the vin
vention is that the individual units >may be lse
the under sides of the groovesr I3. The `flat tail
portion' `I4 continues from. under the ñrst groove
I3, across under the ñrst minor ridge I2 and
then curves upwardly and around under the sec
ond minor ridge I2 -in a' compressive contact
thereunder to terminate in a ‘line at least s1ight~
ly beyond the center of the second minor ridge
I2.. Also itis to be noted that the ñrst ridge ll,
l5` cured to the roof sheathing by nails , driven
onuthe 'left hand side of the sheet ’I0 in this
through a corrugation of major height and,
additional nails may be driven through inter
case, ‘has its-outer lower longitudinal edge I5
spaced a distance above the bottom of the groove
mediate corrugations of minor height so as to
bring the individual units down into’ ñrm con
20` tact with the sheathing Vwhere irregularities Aof
the sheathing may exist.
A still further important featureA of the inven
tion is that the major corrugations may have
I3 >suiîici'ently to preventwater coming down the
roof Yfrom passing thereunder. That is, the edge
I5~is spaced above any likely depth of water that 20
may appear `on the roof.
This left hand ridge
I'I lapsl over lthe right hand major ridge'I I' and
has the ñrst two grooves I3 resting by their un
the side walls closely approach the perpendicular
25.» SO as to resist distortion Whenthesecuring nails
are driven therethrough.
dersides on the tail portion I4 of the next ad
jacent sheet. What moisture may creep up
A still further important feature of the inven
tion is found in the particular joint between the
adjacent units which effectively prevents Water
30 leakage and'at the same time avoids any sharp
bends in the marginal edges of the sheets.
These and many other important features and
advantages of the invention will be apparent to
those versed in the art in the following descrip
I?'I and over the -underlapping ridge 'I-I’ is caught
over the tongue I4 as it approaches the minor
ridge I2 in an air space there provided to break
35 tion of the invention as illustrated in one par
` vticular form in the accompanying drawing, in
Fig. 1 is a top plan view of a fragment of roof
embodying the invention.
Fig. 2, a transverse vertical section on line
2_2; and
Fig. 3, a detail in vertical transverse section
through a. modiñed form of lap between the
Like characters of reference indicate like parts
throughout the several views in the drawing.
The metal sheet, generally designated _by the
numeral I0, is initially provided with some pro
tective coat, such as zinc, while still in the flat
50 sheet. The coated sheet is then pressed or pref
erably rolled to provide a plurality of spaced
apart major ridges II, herein shown as three in
Between these major ridges II are a
55 plurality of minor ridges I2 with intervening
Wardly-past edge I5, under the overlapping ridge
up the capillary action. This trapped moisture
may then flow downwardly over the tongue por
tion I4 without travelling further transversely
since the right hand end of the tongue I4 curls
up and under and is in contact with the under
side of the second minor ridge I2.
As indicated in Fig. 3, the major ridges II are
of considerable elevation, in fact, are made to
be higher than the ridges heretofore commonly
employed in a corresponding sheet. The main
feature in these major ridges II is that their side
Walls are carried upwardly to approach the per
pendicular plane, whereby these ridges will not
become distorted when the securing nails I6 are
driven downwardly therethrough in the sheath
ing I1 thereunder. These nails I6 are prefer 45
ably` provided with lead washers I8 under'their
heads as is the usual practice to prevent leakage
around the nails. It is to be noted that by
providing these major ridges Il, through which
the nails enter, combined with the minor corru 50
gations, there are no sharp bends at the base of
the major ridges as has heretofore been the case,
and yet suñicient rigidity is secured to permit
driving the nails I6. Furthermore, by provid
ing the minor corrugations between the major 55
ridges there is sufficient elasticity to provide
pushing toward the side Walls of the major ridges
in opposition to downward and spreading action
by the pressure occasioned by driving the nails
the form as is now known to me, it is obvious that
I6 as will cause permanent pressure against the
structural changes may be employed without de
lead Washer I8, to maintain a permanent Water
seal without lifting the nails and at the same
parting from the spirit of the invention and I
therefore do not desire to be limited to that pre
time permit expansion and contraction of the
sheets under various weather conditions. Again
as above indicated, such as when there may be
irregularities in the spacing and >elevation Íofthe
sheathing boards I’I, nails may be driven through
the minor ridges I2 as desired, all-without occa
apparent in heretofore experience with sheets
formed with V-like longitudinal edges.
While I have herein described my invention in
cise form beyond the limitations of the following
_I claim:
VA coated metal roofing sheet comprising a plu
rality of spaced apart upwardly extending major
. ridges, a plurality of corrugations intervening be
sioning leakage through the sheet, since these tween said ridges, the under sides of the grooves
15 minor ridges I2 have their upper portions above ’ of thev intervening corrugations being in a com
the usual level that may be reached.
~ p
mon plane and the upper sides of the ridges of
As indicated in Fig. 2, the tail portion extending the intervening corrugations being in a common
from the right hand ridge II, may be shortenedV plane, the upper sides of said major ridges being
from the tail I4 as indicated in Fig. 2, to have the . Vin a plane removed above the upper plane of said
20 tail portion I9 in Fig. 3 extend in a ñat manner corrugation ridges, said major ridges being curved 20
from under the first groove I3 across the first upwardly from`- a groove of said vcorrugations lto
minor ridge I 2 and then turn upwardly into'ínti
mate contact with theouter downwardly sloping
portion of the ridge I2, whereby an air space 20
25 is provided to break up capillary action between
the overlapping sheet portion. f This modified
form as shown in Fig. 3 may be utilized where the
sheet Ill is of a narrower width than that
employed in Fig. 2.
It is therefore apparent that in` the .unique
structure above described, a great many advan
have aside wall sloping but slightly outwardly
from the perpendicular and having a top curving
over and around therefrom into a downturned
side wall of the same rate of but oppositely di 25
rected slope as that of the first wall, all of the said
grooves and ridges including those in said corru
gations and said major ridges being of suflicient
curvature when formed as will retain said coating
thereover in intimate contact without rupture, 30
one of said major ridges being along one side of
tages are to be had over and above the vtype of the sheet and having its outer downturned wall
metal roof sheets heretofore employed. There> terminating by a longitudinal edge at an eleva
are no sharp bends, grooves, nor ridges in my
35 structure so that there is no occasion for the coat
ing to start peeling at any place as afresult of the
forming of the sheet. Corrugations are formed
tion at least as high as the tops of the ridges' of
said corrugations, and another of said major 35
ridges being adjacent to the opposite sheet edge
of sufficient radius to prevent separating ofthe
to have the outer wall of that ridge curved around
into a laterally extending tongue in a plane com
coating from the sheet.
mon to that of the undersides 0f said corruga
Not only are the above
40 indicated mechanical features obtained in myin
the minor corrugations between the major ridges.
tions, and an outer upturned end'on said tongue, 40
said tongue end being positioned under the sec
ond of the minor ridges of said corrugations, said
tongue end being curved around under and in
An additional feature that may be noted in the
intimate Contact with the underside of that
vention, but there is a highly desirably aesthetic
appearance obtained by reason of the existence of
45 sheets formed in accordance with this invention,
is that they may be nested and shipped readily
without damaging the longitudinal edges as is
second minor ridge.
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