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Патент USA US3076999

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Feb. 12, 1963
D. G. DAWQ
3,076,989
PAINT BRUSHES AND THE LIKE
Filed Dec. 29, 1959
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Patented Feb. 12, 1953
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3,076,989
meat of the invention, and a modi?cation thereof, will
now be described with reference to the accompanying
PAENT BRUSHES AND THE LlKE
Donald G. Dart, Adelaide, §outh Australia, Australia,
assignor, by mesne assignments, to American Flange £3:
Manufacturing Co. lnc., New York, Nfif.
Filed Dec. 29, 1959, Ser. No. 362,606
3 Claims. (Qt. 15-192)
drawings, wherein:
FIG. 1 is a perspective view of a paint brush;
FIG. 2 shows the bristle end of the paint brush handle;
FIG. 3 illustrates the construction of the bridge;
FIG. 4 is a longitudinal section through a portion of the
paint brush, the section being taken on the line and in
This invention relates to improvements in paint brushes
the direction of the arrows 4-4 of FIG. 1; and
and the like (hereinafter referred to as a paint brush) 10
FIG. 5 shows a transverse section through the bristle
and it refers particularly to improvements in the means
end of the paint brush, the section being taken on the
for fastening the bristles of a paint brush to the handle.
plane indicated by the line and in the direction shown by
in the manufacture of paint brushes it is usual for the
the arrows 5-5 of FIG. 4.
bristles to have their inner ends held in what is com
Reference is made initially to the construction illustrated
monly termed a “knot,” and for the bristles to be mounted 15 in FIGS. 1 to 5. The paint brush made according to
in a sheet metal ferrule which is fastened to a wooden
this invention and illustrated in these ?gures of the draw
handle by nails, pins or equivalent fastenings. The inner
ings has four parts—-the handle, a bridge member, a
ends of the bristles, in many cases, are set in rubber and
ferrule and a cowl-in addition to the bristles 7 and the
the ferrule is fastened to the “knot” or rubber-mounted
adhesive securing the bristles in the ferrule and the ferrule
inner ends of the bristles by a row of small nails, pins or 20 and cowl to the handle. For the purposes of this speci?ca
the like through the outer end portion of the ferrule.
tion the adhesive is considered as an integer of the com
That is to say, there are generally two rows of nails or
like fastenings~one at the inner or rear end of the ferrule
to fasten it to the handle and a second at the outer or
bination.
The handle 8 of the brush is made of nylon or other
suitable plastic material—-conveniently made by injection
front end of the ferrule to secure the bristles in the ferrule.
moulding operations-and it is of hollow construction. At
An important object of this invention is to provide an
the front or bristle end of the handle 8 is a socket por
improved construction of paint brush which will lead to
tion 9 of substantially rectangular shape, with rounded
economy of production and enable paint brushes to be
corners, having a wall It), a peripheral ?ange 11 about
made more rapidly than hitherto by mass production
that wall, a recess 12 in the ?ange 1i outwardly of the
methods. A further object of the invention is to provide 30 wall It}, lugs 13 extending transversely of the wall 10 at
a construction of paint brush which may be readily
the ends and at intermediate locations in the length of the
assembled by pressing together the several parts, using a
wall, and longitudinal slots 14 in the opposite sides of the
suitable adhesive to bond together the inner ends of the
wall between the lugs 13.
bristles and to bond the bristles and ferrule to the handle.
Fitted into the socket portion 9 is a bridge 15 having
According to one aspect of this invention there is pro
legs 16 formed with spigots 17 for engagement in the slots
vided a paint brush having a handle, a ferrule secured to
14, and holes 18 in the top plate of the bridge. The
the handle, and a knot of bristles in the outer or front
end of the ferrule, said knot being retained in said ferrule
by a water-proof adhesive-as an epoxy or polyester
resin—and the ferrule being secured to the handle by
interlocking engagement of the parts.
'In another aspect there is provided a paint brush hav
outer surface of the bridge top plate is roughened-as by
the formation of criss-cross lines—and the length of the
bridge 15 is substantially the same as the length of the
wall Iii, the legs 16 being of such length and of such
transverse spacing that the spigots 17 will engage in the
slots 14 with the top plate of the bridge extending over
ing a handle provided at its front end with a bridge mem
the lugs 13 close to the outer ends thereof.
The bridge 15 is preferably made as a die-casting of a
handle, a ferrule ?tting over the bridge member and a 45 standard zinc alloy.
3
knot of bristles in the outer or front end of the ferrule,
The ferrule 19 is of substantially rectangular shape
said knot being retained in position in the ferrule by a
with rounded corners, having an inturned ledge or ?ange
waterproof adhesive and the ferrule being secured to the
20 at its front edge, and it is conveniently made as a die—
ber extending transversely of the axial centre-line of the
handle by interlocking engagement of the parts.
casting. The ferrule is of such internal length and-width
formed integrally with the handle.
The invention also provides a paint brush having a
paint brush the bridge 15 is fitted to the socket portion
9 by pressing the legs 16 between the sides of the wall
The bridge member is conveniently made as a separate 50 as to fit tightly about the wall 10 of the handle, and it is
part adapted to be fastened to the handle by interlocking
of such length that when it is ?tted tightly onto the socket
engagement of parts of the one with portions of the
portion 9 of the handle 8 with its rear edge accommodated
other-'—as by spigots or ribs on one part engaging with slots
in the recess 12 the inturned ledge or ?ange 20 is a short
or recesses in the other part-and it is preferably so
distance—as about %"—forwardly of the outer surface
55
constructed that when the ferrule is ?tted to the handle
of the bridge 15.
the adhesive applied to the inner end of the knot of bristles
The cowl 21 is substantially the same shape as the for
will interlock with the bridge member to hold the parts in
rule 19, having an inturned ledge 22 at its front edge, and
assembled relationship.
it is made to be a tight ?t on the ferrule 19. This cowl 21
There may be provided, as a separate part, a cowl fitting
is provided for decorative purposes and is preferably made
about the ferrule—to provide for an attractive or orna 60 of the same material as the handle 8-as nylon.
mental appearance—or there may be provided a cowl
In the assembly of the parts for the manufacture of a
handle, an interlocking member, a knot of bristles, a
19 so as to effect engagement of the spigots 17 in the slots
waterproof adhesive bonding the inner or rear ends of 65 1d. Those spigots 17 are adapted for ready engagement
the bristles to the interlocking member, a female mem
in the slots 14 but they are not easily disengaged there~
ber on either the handle or the interlocking member, and
from. The ferrule 19 is pressed into the cowl 21 and then
a male member on the other of those parts, the male
the bristles 7 are loaded into the ferrule 19 by known
member being engaged with the female member in inter
means. conventionally, the bristles are ?tted into the fer
70 rule 19 from the rear end, passing through the ferrule
locking relationship.
In order that the invention may be clearly understood
until the front ends of the bristles engage with a stop lo
and readily put into practical effect one practical embodi
cated a suitable distance forwardly of the front edge of
3,076,989
the ferrule, when the rear ends of the bristles 7 are a
bristles to said bridge member; and means to ?x an end
short distance—-as about 1Az"—in from the front edge of
the ferrule 19.
When the ferrule 19 is ?tted with the bristles 7 an ad
hesive-indicated at 23—is applied to the inside of the
ferrule 19 so as to cover the inner or rear ends of the
of the ferrule to said handle ?ange; whereby in assembling
the ferrule and bristles with respect to the handle and
bridging member as de?ned, adhesive from said layer is
forced through the openings of said strip portion to effect
a locking engagement between the bridge member and
bristles and securely bond them in position. A suitable
bristles.
adhesive’ is an epoxy or polyester resin. When that ad
hesive hasset a further quantity of the adhesive is added
to the’ surface of the “set” adhesive, and a small quantity
of a suitable adhesive is applied to the rear edge of the
cowl 21. Then, the ferrule 19 and cowl 21 are pushed
over the wall 10 and bridge 15 until the rear edges of
2. A paint brush comprising in combination a handle
terminating in an outwardly disposed angularly-shaped
wall de?ning a socket; said socket wall having engaging
means spaced therealong; a bridge member including a
strip portion provided with openings and having leg mem~
bers projecting therefrom; said leg members telescoping
the ferrule 19 and cowl 21 engage in the recess 12.
In
the socket and having means to lock with said engaging
doing that the second layer of adhesive over the inner 15 means of the socket wall and thereby secure the bridge
ends of the bristles 7 is pressed ?rmly onto the bridge 15
member to the handle; bristles adhesively bound together
so that a part of the adhesive is-squeezed through the holes
and extending away from the handle; a ferrule adhesively
18 in the bridge to effect a locking engagement between
bound to the bristles and enclosing the bridge member;
the bridge 15 and the adhesive-bonded bristles 7. Thus,
a layer of an adhesive extending along the outwardly
the ferrule 19 and its cowl 21, together with the bristles 20 disposed side of said strip portion and upwardly through
7, are secured to the handle 8.
the’ openings in said strip portion to aid in securing the
‘It is to be noted that both the handle 8 and cowl 21
bristles to said bridge member; and means to ?x an end
are conveniently made of plastic-as nylon-by mass pro
of the ferrule to said socket; whereby in assembling the
duction methods, and both the bridge 15 and the ferrule
ferrule and bristles with respect to the handle and bridging
19 are conveniently made by die-casting——-as in a standard 25 member as de?ned; adhesive from said layer is forced
die-cast zinc alloy—s0 as to provide for rapidity and
through the openings of said strip portion to effect a lock
economy vof production. The interlocking of the several
ing engagement between the bridge member and bristles.
partsis effected by the combination of a mechanical lock
3. A paint brush comprising in combination a one
ing of the bridge 15 to the handle 8 and the adhesive bond
piece handle terminating in an outwardly disposed socket
ing of the bristles 7 to the ferrule 19 and to the bridge 30 having a laterally extending ?ange; said ?ange being pro
15. The bridge ,15 provides a firm base for the bristles
vided with a peripheral recess extending around a wall
7and tends to prevent bowing of the bristles at the inner
‘of the socket; said wall having slots spaced therealong; a
end thereof.
bridge member including a strip portion provided with
Itwill‘be realised that as the cowl is provided for
openings and having leg members jointly projecting there
decorative purposes it may be omitted if desired.
35 from; said leg members telescoping the socket and hav
In.cer‘tain.cases, as with relativelywsmall brushes—for
ing ‘lug means to effect a snap engagement with the slots
example 1" and 2" brushes, the ferrule 19- may be made
of said socket wall and thereby secure the bridge mem
of nylon .orother suitable plastic material instead ‘of be
her to the handle; bristles adhesively bound together and
ing made as a die-casting and’ in that event it will not be
extending away from the handle; a ferrule adhesively
necessary to provide the cowl 21.
40 bound to the bristles and enclosing the bridge member;
‘It will be appreciated that there may be made other
modi?cations in details of design or of construction with
out departing from the ambit of the invention as de?ned
by the appended claims.
What I claim is:
1. A ‘paint brush comprising in combination a handle
a layer of an adhesive extending along the outwardly
disposed side of said strip portion and upwardly through
the openings in said-strip portion to aid in securing the
bristles to said bridge member; and means to ?x an inner
end of the ferrule within the peripheral recess of said
?ange; whereby in assembling the ferrule and bristles
terminating in an outwardlytdisposed annularly-s'naped
with respect to the handle and bridging member as de
wall de?ning a socket; a ?ange extending exteriorly and
?ned, adhesive from said layer is forced through the
laterally of said handle adjacent the socket wall; said
openings of said strip portion to effect a locking engage
‘socket wall having slots spaced therealong; a bridge mem 60 ment between the bridge member and bristles.
ber including a strip portion provided with openings and
References Cited in the ?le of this patent
having leg members projecting therefrom; said leg mem
UNITED STATES PATENTS
bers telescoping the socket and having means to engage
th?SlQtS Of said socket wall and thereby secure the bridge
‘932,630
Miltner ______________ __ Aug. 31, 1909
member to the handle; bristles-adhesively bound together 55 2,316,870
Jacob et al. ________ _,__.. Apr. 20, 1943
and extending away from the handle; a ferrule adhesively
2,508,931
Simms ______________ __ May 23, 1950
bound to the. bristles'and enclosing the bridge member;
2,610,345
a; layer of an adhesive extending along the outwardly
2,779,043
disposed side of said strip portion and upwardly through
2,840,841
the openings in said strip portion to aid in securing the 60 ‘2,854,684
Simms ______________ __ Sept. 16, 1952
McMillan ____________ __ Jan. 29, 1957
Maxwell _____________ .. July 1, 1958
Hardman et a1.v ________ _._ Oct. 7, 1958
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