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Oct. 8, 1946. ,
' '
A. c. KARELIUS
I‘ 2,403,781
LA'I'HING
Filed Feb! 12, 1945
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2 Sheets-Sheefl
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INVENTOR.‘
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P§$EERTG.KARELIUS_
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ATTO R N EY
Oct. 8, 1946.
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A. c. KARELIUS
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2,408,781‘
LATHING
Filed Feb. 12, 1945
2 Sheets-‘Sheet 2\
"20 Q Fig.3.
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BY
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INVENTOR.
C. KAREuus -
acuww anm,
ATTORNEY
2,408,781
Patented Oct. 8, 1946
*ZUNI T:E'LD
(PAT ENT IO‘F FTQITJCIE
*’2‘,408,781
\LATHING
Albert C. Karelius, Altadena, cam.
c?tpplicatiomFebruary 12, 1945, Serial No. 5,7;75507
I9 Claims. (Cl: 72-116)
.1
,2
l
. in adjacent rows “of ‘openings, ,softhat. under; the
v :Thisinvention relates generally to lathing of
(the @character-.=disclosed. in: myaco-pending/ appli
.itrowelingpressure of, mortar against theface of
z; cation ‘Serial :No.= 535,615, , ?led ,May 15, @1944,- and
, the backing sheet, the , latter will yield most , read
IIily along. continuous intersecting ,paths . 'extenfd
1=its .vbroad aspect, the application above 5 '.ing..obli_quely .‘with respect 1to,.and crossing ‘the
"front and ‘back wires ' intermediate Jthe'ir ,inter
.‘ identi?ed disclosesmlathing-consisting of a back
sections, whereby. to, produce , on the back Ijof », the
ing member of ?exible sheet-.materialasuch as
,plastercoat a. raised reticulated patternob1ique~
.T‘st-rong, * tough paper, nanda rmeta'llic zreinforce
.ro?ic-ially; allowed-ion Qctober.~23, 1944.
p
flyrelatedto .the wire mesh reinforcement, which
‘11118111;- :composed. entirely -;of front and-"back wires
rim-intersecting .-relation,:.and {between 7which »the 1.0 .yfunctions as, an ,~ added. reinforcement tonthellath
ing?againstr-deformation by lateral.- stressesmand
f1backing--:member gis interposed, with, such wires
,coeacts with-the wires to, eliminateanygcontinu
“being -,~,welde'd ‘together at their intersections
.ous “line of structural weakness (through ‘the
rt-hrough» openings»:v in :the backingrsheet - in ' a sin
thicknessof the plasterncoatwso asrto obtain ,a
~g:le»swelding operation‘ for maximum‘. economy,~all
fin Isuoh manner as »:to ,,,:provide ;,practically * the __l5 stronger ?nished product _, when - the ,plasterlhas
.1'S617.
ssame;:plastereembedded reinforcementias ‘would
A furthergobject of. thislinvention is tov provide
l*he-robta'ined rby'cthe - use of ‘Pa ime‘sh fabric without
saiibackingémember.
> a lathing of- the above described character whose
>
Istaggered and overlapped. arrangement -of elon
.iArprimarysiobj GCtflOf they-present :inventi'on'lis c to
fzprovide a'ilathin‘g- of :the :abovezdescribed ‘:general ,>20 ;vgatedv plaster ,keyingopenings in the .backing
'sheet,»@with each opening spanned transversely
character having all the advantages :ofrthe :two
adjacent-its ends by :two, front wires»and-,>-longi
swire ,reinforced:lathingas above described, [with
studinallyL by a v..bacl<= Jwire, ‘more . adequately sup
can ,Ia'dded "novel T; functional :relationship {10f :.its
:front wires to’srows ao'f ;e1ongated.:.plaster+keying
,ports the-‘plastenkeys while settingrso?as-topre
:baoking .=-sheetz at zsuchzlocations fthroughout its
vfromcthei-keys. on :vertical walls, thus producing
mobtaizra more uniform- plaster coat-thickness . free
.ments and‘ functional - relationships of elements
:-as eset -:forth in - the following speci?cation» and
aopienings :1 through :the iba'ckingrmember, v'f or .co 25 ‘vent the 'end portions of “the .keys from sagging
away :from the-bodysof mortar: under _ the weight
iaction withithe :back Wires which span? :theaopen
“of? the keys, 'as well~as reduce the mortar drop-off
sings ilongitudinally athereof, ‘Lin ' :supporting :the
keys ‘of Egreater strength which more securely
ciareagthat .1 thelbackingssheetzwill :tend: to wield
:lmore samiformly lbcth ilongitudinally rand r. trans 30 clock; the plaster {coat to the ,lathing.
With these and othertobjects in view, them
iversely :under I the troweling :pressure crof :mortar
vention resides in the, combinations, arrange
against the face ofvzithesba'cking .sheet,::so=,as‘:to
;; fronnsetting; cracks; and :to :avoidscontinuous lines
con-structural :weakness: throughsthe: plaster coat -35 Ppar-ticularly; pointed out: ln-theeappended claims.
“In :-the l-accompanying drawings,
Figure 1 ‘is a viewi-showing in frontrelevation,
:productrwhlchw?l ie?ectivelytresist 'deformation
the formof lathingxembodying this invention-and
ragainst'bending :stresses:imposediahereupon lon
(applied to members of a-building frame;
egitudinally, transversely, or obliquely.
:More speci?cally, zit :iszanrobject iof'rthepresent 40 Figure 2 is a viewpfrthe lath-ing-inrearele
vation;
:JIHVBIItiOIlitO’PI‘OVidGQa, lathing, thebackingzsheet
~ inczanyadirection,‘ vwhereby ato produce-1a L'?nished
Figures , isqa vview on a reduced, scale,- showing
" of :which:~ has ‘plaster .zkeying :zopenings ‘.there
ithrou'ghxrarranged end "; to rend in z-pa-rallel "rrows
:the :lathing .in .-rear~e1evation,-,after.the> applica
ition ofyplaster- to-the lathing;
itoiilea-ve' :lwebs ofiibackingJsheettmaterial l-between
fithe ?ends .x'o'f ‘successive -.‘openings, and with time 45 lFiggureaifis fa, full-size longitudinal sectional
ao'peningsl v"of ‘ each’frow "Ibeing Irstaggered" :with: re
-view of: the-lathirrg-taken on the ,1ine-4—4.-of Eig
---spect' é-to ithezzopenings :ofiadjacent; rows sand ';in
isu?i'ciently soverlapr?ngz or. opposedxrelation ifor
».ure;3;
Aeachsopenin'g $051116} spanneditransversely :by two
roof ,thet-lat'hing taken ,on.,the line:.5—,-.5 of ‘Figure
.front .--w.ires, 1 and the‘ openings of ‘ each .row
Figure 5 is a full size oblique sectionalview
50 ,3;__and
sspanned-ilon-gitudinally by a ‘back ;wire which is ‘
I
_
,Figureso and rI-are fullsize transverse ;sec
-weldedeto'r-theifrontawires-through such openings.
rtional views taken,»respectively, ,on‘theilines 6—-’6
.II‘his. arrangement-of elements results vin .the back
.and 1-4 of FigurelB.
'
~l-Referringtspeci?cally to the, drawings, the in- '
ing?sheetrbeingz supported-against the‘lba'ck .vwires '
at the webs" in a staggored-relationv of fthewwebs ~55 Vvention sin its ‘illustrated embodiment f broadly
3
comprises a backing member 13 and a plaster re
inforcing metal fabric F. The backing member
B may be constructed from suitable sheet ma
terial such as strong, tough paper out into rec
tangular sheets of a predetermined standard size.
The member is provided throughout its area with
4
rearward ?exing under the troweling pressure,
as the webs bear against and are supported by
the relatively heavy back wires I6. However,
from these areas of greatest resistance indicated
by s in Figure l, the ?exibility of the backing
members to troweling pressure increases to a
center dimension may be two inches in practice, 10
maximum along the paths indicated by the lines
y in this ?gure. These paths of greatest weak
ness or most ?exibility of the backing vmembers,
extend indirections oblique with respect to the
as an example.
lengths of the Wires I5 and I6 and are in inter
precut elongated openings l0 de?ning relatively
narrow slots which are arranged end to end in
uniformly spaced parallel rows whose center-to
The ends of successive openings
I0 of the horizontally disposed rows for a verti-H 1 secting relation so as to cross the two series of
wires intermediate the welded intersections of
cal wall as illustrated in the drawings, are spaced
the wires as clearly shown by the aforesaid
apart a relatively short distance to provide an
intervening web II of backing sheet material, 15
1 lines 11.
'The ?exing of the backing member in this
which, in practice can be as little as three
manner under troweling pressure creates on the
eighths or one-fourth of an inch.‘
back of the plaster a raised reticulated pattern
It will be noted that the openings of- any one
as indicated at I9 in Figure 3, which is obliquely
row are uniformly offset with respect to the next
or adjacent rows, so that the webs II of alter 20 related to the pattern formed by the wire mesh
reinforcement F 50 as to act as an added rein
nate rows of the openings ‘are correspondingly
staggered. Furthermore, the end portions of the
openings are in a considerably overlapped or
opposed relationship to the end portions of the
openings of the next row, as most clearly shown
in Figures 1 and 2.
The plaster reinforcing metal fabric F consists
of one series of front wires I5 and one series of
larger back wires it‘ arranged in right angular
intersecting relation. The backing member B
is interposed between the two series of wires,
with the back wires spaced apart the same dis
tance (two inches) as the rows of openings l0,
and spanning the'latter longitudinally as shown
best in Figure 2. The front wires may, in prac
tice, be spaced a lesser distance such as one and.
one~half inches, than the back wires I6, and
span the openings ID transversely thereof.
It will be noted most clearly from Figure 1
forcement of ‘the lathing against deformation
by bending stresses, and co-acts with the wires
to avoid any continuous line of structural weak
ness through the thickness of the'plaster, thus
rendering the latter substantially uniform in
strength throughout its area.
'
Under the troweling pressure, mortar is forced
through the openings Ill around the portion of
the back wire I6 and the two front wires I5 span
ning each opening, so as to form plaster keys 20
in which the back wires are embedded substan
tially throughout their lengths as shown in Fig
ure 4-.‘ ‘Furthermore, the front wires I5 are com
pletely embedded in plaster throughout their
lengths as shown in'Figure 6 sofas to lock the
plaster to the fabric F with practically the same
efficiency as would be obtained without a backing
member, yet providing all the advantages of the
that by virtue of the staggered relationships of 40 latter in preventing the waste of plaster by areas
each, row of openings Hi to the next row thereof,
and the considerably overlapped or opposed re
lationship of the end portions of the openings
of each row to those of adjacent rows, each open
of excessive thickness.
-
It will also be noted that with the front wire
spanning each opening I0 adjacent its ends, the
mortar, which when set forms the plaster keys
ing is spanned transversely adjacent its ends by 45 20, is more adequately supported by these wires
against breaking away under its weight, so that
two front wires I5 which are welded or otherwise
partially fractured or cracked plaster keys are
permanently secured to the back wires IS in the
prevented, and maximum locking action from the
openings If), as indicated at IT. The metal fab
plaster keys obtained. Mortar drop-off from the
ric F is now a unitary reinforcing structure be
tween whose two series of wires I5 and IS the 50 plaster keys is also minimized by the support
given to the mortar by this novel arrangement
backing member B is locked.
of the wires in the openings.
The sheets of lathing as above described are
secured at intervals (six inches or less) with
their edges in overlapped relation as shown in
Figure 1, to members M such as studs or rafters‘
of a building frame, by the “nail-on” or “tie-on”
method, which latter is utilized for metal mem
bers as indicated at I8 in Figures 1 and 3, for
the application of plaster to the wall foundation
‘thus formed by the lathin-g
Assuming that a vertical wall is to be plastered,
and that the rows of openings It in the lathings
‘are horizontally disposed, mortar is troweled as
In conclusion, it will be manifest from the fore
going description that the present invention not
only provides for manufacturing of the product
at a relatively low cost with only a singleweld
ing operation of the front and back wires I5 and
I6 through the openings I0 of the interposed
backing member B being required» to complete
the lathing in a continuous operation, but that
the plaster coat applied to the lathin-g will be
locked to the metal fabric F with maximum se
curity and will be free from continuous lines of
structural weakness through the. plaster in vany
direction across the lathing; Furthermorethe
novel arrangement of reinforcing wires I5 and
ward stroke and then generally horizontal back
I6 and openings H] in‘ the backing member. on.
and forth spreading strokes to ?atten out the
ables the mortar to be-readily applied to ‘obtain
surface of the mortar.
an economical ‘plaster coat of substantially uni
Due to the above described staggered and over
lapped relationship of the openings Illof each 70 form thickness with a ?at outer surface. Also,
no such sagging of the mortar while setting, will
,row'to the openings of adjacent rows, with a
occur to produce cracks in the dried plaster coat
corresponding staggered relationship of the webs
which might structurally weaken same, or be
ll of the respective rows, it'will be clear that at
di?icult'if not impossible to ?ll by application
the webs, the vbacking members will offer the
of another coat of plaster,
' "
->
maximum resistance to lateral deformation or
in normal plastering technique, against the front
faces of the backing members B by a ?rst up
agitate-1
*6
h-aving elongated openings spaoedlend teem-51m
" '1. "ll-iathingofwthe
parallel rows to leave‘ r'elativelyiinarrowiweb of
backing sheet material between the‘ ends IofIf-the
described com-prising:v
af-bac ing. memberof? T iblei sheet mater/‘ialfhav
ing elongated openings spaced endj'to- end in
‘openings; "the opening-sfof- eachgrowe- beingstag
backing ‘sheet, material ‘between the'ends of the
rows; ~ vand ' a metal reinforcing fabric ' composed
gered wit, respect- tQ/fthe openings of» v‘adjacent
ing; member is interposed; with the wiresf’respecé
tively~ spanning said'openings transversely-and
gered with respect ‘to the openings» of‘ fadi-acent
parallel rows-its leave 1relatively§narrow~ webs" ‘of
of front and back‘ wires‘ between which; the back; '
openings‘! the fopeningsof eachv row being stag?
rows; "'a-"met'al-reinforcing fabric having wires
spanning said openings longitudinally thereof 10 longitudinally and being welded together at their
intersections insaid openings; each of said open
on one side of the member, and having other wires
ings being spanned by two front wires for co
spanning all openings of all rows transversely
action of all wires with the aforestated staggered
thereof on the other side of the member; and
arrangement of said openings and with said webs,
means permanently securing saidvwires together
15 to render the backing member most yieldable to
at their intersections in said openings.
the troweling pressure of mortar against the lath
2. Lathing of the class described compris
> ing, along intersecting paths obliquely related to
ing: a backing member of ?exible sheet material
said fabric and intermediate the wire intersec-'
having elongated openings spaced end to end in
tions of the latter, so as to form on the back sur
parallel rows to leave vrelatively narrow webs of
backing sheet material between the ends of the 20 face of the plaster a raised, reticulated pattern
reinforcing the plaster coat.
openings; the openings of each row being stag
6. Lathing of the class described comprising:
gered with respect to the openings of adjacent
a backing member of ?exible sheet material hav
rows; the end portions of the openings of each
ing elongated openings spaced end to end in par
row being in opposed relation to the end por
allel rows to leaverelatively narrow webs of back
tions of the openings of adjacent rows; a metal
ing sheet material between the ends of the open
reinforcing fabric having wires spanning said
ings; the openings of each row being staggered
openings longitudinally on one side of said mem
with respect to the openings of adjacent rows;
ber, and having other wires spanning said end
and a metal reinforcing fabric composed of front
portions of all openings transversely on the other
and back wires between which the backing mem
side of the member; and means permanently
ber is interposed, with the wires respectively span
securing said wires together at their intersections
ning said openings transversely and longitudi- '
in said openings.
nally and being welded together at their inter
3. Lathing of the class described comprising:
sections in said openings; the end portions of
a backing member of ?exible sheet material
having elongated openings spaced end to end in 35 the openings of each row being in sufficiently
opposed relation to the end portions of the open
parallel rows to leave relatively narrow webs of
ings of adjacent rows for each'opening to be
backing sheet material between the ends of the
spanned transversely at its end portions by two of
openings; the openings of each row being stag
said front wires, for co-action of the fabric and
gered with respect to the openings of adjacent
rows; a metal reinforcing fabric having wires 40 backing member in preventing continuous lines of
weakness through the thickness of a coat of plas
spanning said openings longitudinally thereof on
ter applied to the lathing.
one side of the member, and having other wires
7. Lathing of the class described comprising:
spanning the openings transversely thereof on
a ?exible backing sheet having elongated open
the other side of the member; the endportions
of the openings of each row being in opposed rela 45 ings spaced end to end to leave relatively narrow
webs of backing'sheet material between the ends
tion to the end portions of the openings of adja
ofthe openings, with the webs of each row in
cent rows, with each opening being spanned at
staggered relation to the webs of adjacent rows;
said end portionsby two of said other wires; and
andfront and back wires respectively spanning
means permanently securing said wires together
50 said openings transversely and longitudinally
at their intersections in saidopenings.
thereof on opposite sides of the sheet and welded
4. Lathing of the class described comprising:
together at their intersections in said openings,
a backing member of ?exible sheet material hav
with two front wires spanning an opening for co
ing elongated openings spaced end to end in.
action with the backing sheet in rendering the
parallel rows to leave, relatively narrow webs of
latter most freely yieldable to the pressure of I
backing sheet material between the ends of the
mortar applied to the lathing, along intersecting
openings; the openings of each row being stag
lines obliquely related to said wires and inter
gered with respect to the openings of adjacent
mediate their intersections, for the purpose de-.v
rows; a metal reinforcing fabric having wires
scribed.
spanning said openings longitudinally thereof on
8. Lathing of the class described comprising:
one side of the member, and having other wires 60
a
?exible backing sheet having elongated open
spanning the openings transversely thereof on
ings spaced end to end to leave relatively narrow
the other side of the member; the end portions
webs of backing sheet material between the ends
of the openings of each row being in opposed rela
of the openings, with the webs of each row in
tion to the end portions of the openings of adja
cent rows, with each opening. being spanned at 65 staggered relation to the webs of adjacent rows;
and front and back wires respectively spanning
said end portions by two of said other wires; and
said openings transversely and longitudinally
means permanently securing said wires together
thereof on opposite sides of the sheet and welded
at their intersections in said openings; said other
together at theirintersections in said openings,
wires being su?‘iciently near the extremities of
said openings to support the end portions of 70 for co-action with the backing sheet in rendering
the latter most freely yieldable to the pressure of
plaster keys in said openings against’ cracking
mortar applied to the lathing, along intersecting
away under their weight, from the body of plaster
v
applied to the lathing.
'
' lines obliquely related to said wires and interme
diate ‘their intersections; each of said openings
5. Lathing of, the class described comprising:
a backing member of ?exible sheet material 75 being spanned transversely adjacent its ends {by
2,408,781
7
8
the front wires for co-action of the back wires
therewith‘ at their intersections, in adequately
supporting the end portions of plaster keys in
said openings against breaking away from the
plastic mortar when applied to the lathing.
9. Lathing of the class described comprising:
va metal reinforcing fabric consisting entirely of
two series of wires in right angular relation and
welded together at their intersections; and a ?ex
ible backing sheet interposed between the two
series of wires and having elongated openings ar
ranged end to end in parallel rows, with the open
ings of each row in such staggered relationship
to the openings of adjacent rows that each open
ing ‘is spanned transversely near its ends. by two
wires of one series While a wire of the other series
spans each opening longitudinally thereof.
ALBERT C. KARE-LIUS.
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