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Патент USA US2404245

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July 16, 1946.
>2,404,245 n
' -
Filed' Dec. 8, 1944
@äh-z' -l
Patented July 16, 1946
UMTED: STATES; PATENT or17T-irren:2,404,245
Anders C'. Olsen, 'Forest Hills, N. Y;
Annliootienlëeoombor 8, 1344, Seriol.l\ï9.=` 567,245..
4» Claims.
(C1. Sai-b1)
This invention relates toA fastening devices of
the driven class. Qne adaptationof'the invention,
or other nail‘dike fasteners of the driven class,
the fastening device o_f~thepresentlinventionis
8. from
The, metal
a flat nietal
strip .or
is in building construction and', more particun
larly, for securing flexible-type, Weatherproof
covering materials, such asroofing .shingles> and
the like, to sheathing or other supporting sur
faces of the. type4 characterized by a low de
gree of naileholding povven.
My invention is particularly concerned with
the provision of a fastening device for use in 10W
_ the reference numeral' i0, may be cut-_ fronfiA a`
cost building construction wherein flexible-type,
weatherproof roofing or sidingisto be secured to
sheathing of gypsumboard, fiber insulation >board
thctriansiilnr niece, M'gdeiined thereby. The. thus
or other similar types, of protectiveY sheathing.
fold line. L5: extending». from.. the. Cntoiit. 'atr i2.;
to. the. intersectionnoint. indicated. at. 1,6; t0' .foltxn
generally possessing lownail-holding character
An object ofv the invention istoprovide a fas- '
continuonsv ribbon „intoA a' substantially rectangn
lar. ooniig..trationY as Shown’. and.. Stamped.' out.
or otherwise `out. along.. the converging diagpnoi
lines I'I;- and. L3, n_geeting` as at lil,` or ’ifW desiredi
Connected bv o.. Snort horizontal out, to.v remove.
Stamped.; Strip or. blank, l0. may be. then. folded,
longitudinal'lv snbßtantiallv alone the median.
the. inirtanosed but". separable legs.- comprising.
the Shankt portion.v of tneiastener». Thel strin
toning device for that purpose. which. will be
or. blank .lll is» also. bent, oriolded., Substantially
of simple,y inexpensive, design> and, will possess
along. the lines lli and. i8.. inP a. direction.. toward.
adequate holding power when driveninto sheath 2,0 thei
shank., ondv reversely alone.. the lines, liV and'.
ing materialsy of the> above, described character.
to form. the. heed.. portion. ottho .fas
It is also anÍ objectof the invention to, provide
a fastener which». will be. highly efhcient in,y 5.6.-.
curing flexible` and. frangible covering materials.
to sheathing material ofÀ the character described»,
" and which is designed» to. off-enmaxìmumresiste
ance tothe tearing looseÍ of. suchcoveringvmaj
tener Ivins. in.
plane. whinn. extends/Substanz
tially at. right angles, to.` ther plane. of. the
in, thus forming thefastenins. devine, tnetrî:
angular web or hingenortions 2 L andlî, rennen#
tively defined, hv tin=«,-fol.dr o1"L bendlines, lle-.LSL
and Iii-20, aradonblesi, beneath, the head non.
tion. on either side of.- the. Shonlsasindìfëated. in
30 Figs.. 1-5.; andthevserveto reinioroe. thehead
A further object. of the inventionv is to provide
portion.. Withv this. arrangement, the, .outer
a fasteningY device. of.. the Character indicated,
straight.. edges 1?.. and.' 2.4. of. the. blank. form. the.
which can be` easilyV handled and readily ap
inner edgesoi the-separable legs at a linear-posi:
tion wllionissubstantiailv centrallyY located. ' 1th.
Other objects andv features ofthe invention 3.5 respect. to, the, distanoe along the head. nortion
willV be more clearly apparent from thev detailed
betweeno- the. pointY it and the.. opposite straight,
description which is to,fol1ow and from the ac
terial under the stressof severe weather condi~V
tions involving hignwinds, hail or driving, rain
edgß. 2.5. aniiithnsnraotioallv coincident, Witiithe »
companying, drawing in which:
Figs. l and' 2 are. opposite> perspective viewsof
a fastening. deviceembodving the present. inven-v 40. Referring noW more particularly toFigs. 1^ and
2, the. reference. numeral.. 30.. designates, the. fas.
Fig. 3 isf
vertical axisnf. the=head~nortion-~-
enlarged elevation View of` theias.
Figs. 4 and 5' are right and left hand views,
târlìng, device of-_ the-present inventionwhich. is
formed from. flotl` metal» Strip.- l0, as above, der,
scribed.. As shown, the. fastener comprises a nailf
45 likeÁ device having, a. head. portion` 35 and` a .shank`r
respectively, ofthe device shownâ in Fig. 3:
portion 4.9., integral; therewith, As. previously.` inf
Fig. t" is a fragmentary View iliustrotinsthe
dicatedthe shanlcportionliesoin. a plane extend-~.
action of' the fastener in one,V application of; the
ing substantially marient-.angie to theheadnor
present invention;
tionandoomnrises a pair of separablelegs #Land
Fig.. 7 is. a view. similar to. Eig, .6.. showing. the.
toeaon other along. theflongitudinal
device. of the, presentinvention. in. its.. fnllv driven 50 foldconnected.
45 and to the head portionA 3,5I by the Webs
2l. and.. 2.2 folded underneath thev headA portion
Fig. 8. vis, a plan View of- the .stripor blank., from»
and in, contact therewith, „
which- thev device of, the », present invention, `is
As bestshown inlî‘igs,~` Zand 3„.thß'f identically
formed, with cut, and" folddinesf. indicated. thereon,
beveled. legs< 4_I. and. 4.2l taper from the lower ,end>
As distinguished from; thel'ordinary. wire nails 55 of the.longitudinal..fold.45E along their respectiveV
3 .
of the thus-*formed fastener .will preferably be,
, sides Il and I3 to their respective pointed ends
i 41 and 48.
about %" long, measured from
Thus, the pointed ends Y41 and 48 '
Í will be substantially centrally located relative to `
the perimeter 0f the head portion 35.
, ends 41 and 48 are dìvergently bent from a point i
§ along the shank 40 indicated by the numeral ,
` 49 which is preferablyat approximately the mid
point between the lower end ofthe fold 45 Vand
Í the pointed ends 41, 48.
, In utilizing the above described fastener to Vse
cure, for example, plies of ñexible roofing mate- ‘y’
the lower end of i -
fold 45 to the pointed ends, and bent outwardly
beginning at about ,-"e" up from the pointed ends
so that the latter are spaced apart about 1/8”,
for this gauge metal. This initial spread ofthe
pointed ends is an important feature of the in
vention as it enablesV the separable legs to be
easily' forced apart, when the fastener is driven
into thesheathing, to achieve the optimum in
holding power with respect to the sheathing ma
' _ terial'into which the fastener is driven. '
rialto a roof deck comprising ñreproof gypsumwNv
In order to evaluate the holding power of my
ï board, as illustrated in Figs. 6 and '7, the fastener Í- Y fasteners for comparison purposes, I used them
f is handled in the same manner as an ordinary`
-to fasten, inthe usual manner, two superposed Y
' wire roofing nail and may be driven into the roof
layers of mineral surfaced roofing (weighing 90
ing and underlying sheathing with the Yaid Vofa` `
pounds pervlûö Ysquare feet) to a gypsum roof
hammer. . The pointed ends 41'and 48 ofA the
deck'. The ends of the roofing strips were pulled
until the roofing ripped around the head of one
of the fasteners.` After'a number of tests, it was
foundthat an average of about`45 poundswas
separable, beveled legs 4| and 42 will, of course;y
readilypierce the flexiblev roofing plies 50 and 5|
andk also pierce the frangible gypsum sheathing 20
V52 lying underneath. As the fastener shank is
required to rip the roofing, or'pull the fastener
from the gypsum board. By way of comparison,.
driveninto the sheathingthe already divergent
1y >:bent legs 4I and 42 will continue to spread
` the ordinary 'M35' -galvanizedV rooñng~ nail (3/8”
along >divergent paths depicted in Fig. 6, until¿
diameter head) required only slightly more than
they` ‘assume arpositionY approximately as indi-1
le pounds pulling force to remove it fro-m the
Y cated in Eig. '1.V When the fastener is driven
same vconstruction of two layers of 90 pound min
eral surfaced roofing _secured to gypsum roof
‘fhomemso thaty the head 35fbears down against
the outer ply 50 of the overlapped plies ofroofing,`
. the diverging coursestaken by the separating legs, , .
will resemble somewhat the illustration in Fig. '7.l
With the legs of the Áfastener shank'thus exey
tending in arcuately divergentpaths within the
VsheathingA board 52,' it would require a substan-`
tially greaterforce to render the fastener ineffec
tive in securely holding the roof covering mate->
VThe enhanced holding power obtained rbynem
ploying Ythe fastenersr of ' the- present invention
even Vexceeds the above-stated'average of about
40 pounds required to free twohlayers of 90 pound
,A roofing> nailed .to a wood roof deck with> standard
’7/3” roofing nails. Then, too, these improved
rial 50 and 5|.to a roof deck than wouldV be re--`v
quired fin the -case of an ordinary wire roofing
nail, Yor even one that was providedfwith abarbed
fasteners-can bev handled like nails, require no _
shank, 4and especially'rwhen the roof deck is con
sign as to permit rapid, large scale production at
a cost which would not prohibit -their use ínplace
more careto their> application than the ordinary
nails, since they consistently drive well without
bending or twisting, and are of such simple de
f structed with gypsum or fiber insulation board or
some such material that is characteristically poor.’ »
in nail-holding properties. Infact, the present t
invention provides ‘a fastener for use with low
nail-holding power materials that will require a '
pulling force about on a part with the force re
-quired to remove Va roofing nail from a roofydeck
» constructed vwith a material having high nail-1holding characteristics, such as wood.
'Another important factor to be considered in
designing .fasteners thati will be efficient in se
weather conditionsl involving high winds, hail or
driving rainstorms.V „Under such conditions, there`
is Va tendency -for the fieXible roofing to'beY lifted
up against theheads of the nails orY other type
` " vfasteners .holding the roofing in place and, unless
these heads are, each wide enough to provide a
to alsupporting base possessing a degree of nail
holding `power ranging from the low nail
Vholding power of materials on the'order of in
sulation boardv to the high nail-holding power of
wood, and may also be used for securing sheet
material to wood in building construction.
reasonable amount of bearing surface, the roofing
' ofttimes will be torn and ripped away from the
fastener head. >By forming the fastener of the
Present invention from a metal strip of any de
sired ïwidth', therermay be provided a fastener , .
head which has suñicient .bearing surface to avoid
the Vaforementioned danger. In the case of Ythe
ordinary wire nail, or flat-headed wire staple, on
the other hand, the sizeof the head is necessarily
limited to the largest >diameter of f wire _used in
thelconstruction ofrbuildings having insulated.,
ñreproof'and,weatherproof roofs and side walls
where it is desired to employ relatively inexpen
sive Vflexible orgenerally frangiblertype covering
material ,inconjunction with sheathing or roof
decking of the character possessing low nail
yholding power.
tener as being adapted for use in the‘aforede
scribed type of Vbuilding construction, it willbe
understood that this form of fastener is also'ca
pable of being enicientlyV used in vother type of,v
construction, such as furniture, vehicles, toys'or
the like,'where sheet material is vto be secured
deck is the stressY and strain imposed on the roof
covering and the fasteners therefor -by severe
making the fastener. '
of ordinary wire nails. ' Finally, the simple, im- `
provedvfastener ofthe present invention enables
While I havev particularly described »my fas
v curing a'fiexible type roofing material to a roof
one practical embodiment ofmy invention, '
I Ymay form a fastener'of the aboveA described
character from Yan V18, gauge flat strip Vof hot-.
1.'.A fastening device fabricated from a'fiatV
Y metal strip bent at ‘one end to provide a head
portioncand folded longitudinally to yprovide a
shank portion lying in a planeat a right angle
to the plane of thehead portion, said shank por
tion comprising'legs- juxtaposed for a substantial
distance Yalong their length, said legs being con- «
nected togetherl for a distance along the longi-4
tudinal fold and terminating' in divergently-bent
points whereby sai'dV legs are adaptedt'o diverge?
rolled, annealed sheetsteelhaVíng dimenSîOns Of ,~ f»
»say 1/2" r11/rf. Inthis instanee;thebeve1ed1egs 'i5 when forced into fastening position.
2`. A fastening device fabricated from a flat
metal strip bent at one end to provide a head p_or» t
tion and folded longitudinally to provide a shank
portion lying in a plane at a right angle to the
plane of the head portion, said shank portion
comprising legs connected together for a distance
along the longitudinal fold, said legs having
pointed ends and being tapered between said
` bent pointed ends and being tapered between said
connection and said pointed ends and being
adapted to diverge when the fastening device is
driven, said pointed ends being centrally located
with respect to the head portion.
` 4. A fastening device adapted to be driven, said
device being fabricated from a flat metal strip
bent at one end to provide a head portion and
connection and said pointed ends and being
folded longitudinally to provide a shank portion
adapted -to diverge when forced into fastening 10 lying in a plane> at a right angle t0 the plane of
the head portion, said shank portion Acomprising
3. A fastening device adapted to be driven, said
legs joined together and to the head portion along
.device being fabricated from a iiat metal strip
the fold, said legs being beveled diagonally from
bent at one end to provide a head portion and
the end of the fold to divergently-bent pointed
folded longitudinally to provide a shank portion 15 ends and adapted to diverge when the fastening
lying in a plane at a right angle to the plane of
device is driven, said pointed ends lying in a plane
the head portion, said shank portion comprising
approximately common to the plane of the longi
legs connected together for a distance along the
tudinal axis of the head portion.
longitudinal fold, said legs having divergently
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