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Патент USA US3096223

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July 2, 1953
F. MCCURTAIN
FLOCK APPLYING DEVICE
Filed Dec. 27, 1960
3,096,213
United States "atent @
1
1
k.
(I?
3,096,213
Patented July 2, 1963
2
3,096,213
form 12 supported on corner legs 13. The central portion
of the table 12 is provided with a rectangular opening 14
Frank McCurtain, Los Angeles, Calif., assignor of one
half to Zack E. Gibbs, San Marino, Calif.
Filed Dec. 27, 1960, Ser. No. 78,509
8 Claims. (Cl. 118-638)
therethrough in which is supported a rectangular frame
15. The table 12, legs 13 and frame 15 may be formed
of any desired material, conveniently wood. Mounted
interiorly of the frame 15 and depending therefrom is
FLOCK APPLYING DEVICE
This invention relates generally to apparatus for pro
ducing a pile surface on adhesive-coated portions of a
a rectangular frame 16 of an insulating material such as
phenolic resin. The frame 16 is of substantial depth, and
intermediate the top and bottom edges thereof is mounted
foundation material, and more particularly to an appara 10 an inwardly directed, shelf-like frame 17 upon which is
tus in which pile forming ?ock is fed to the adhesive
supported an insulating screen 18. The screen 18 extends
coated foundation material in an electrostatic ?eld to
form an erect pile thereon.
Apparatus has been proposed heretofore for producing
horizontally across the frame 16 and divides it into an
upper portion 19 and a lower portion 21. The screen 18
may be woven from strands of any of the well known syn
a pile ‘surface on foundation materials by supplying ?ock 15 thetic insulating materials and is preferably of the order
thereto in an electrostatic ?eld, but such apparatus has
of 18—20 mesh.
been complicated and expensive, particularly in the mech
anism provided for feeding the ?bers of the ?ock into the
Supporting posts 22 extend upwardly from the upper
surfaces of the side members of the frame 17 and support
?eld. Such apparatus has further failed to produce a de
insulating strips 23 of phenolic resin or similar material
sired high intensity ?eld adjacent the electrode from which 20 at the opposite sides of the frame 16‘. Upon the strips 23
the ?ock is fed, cooperating with a lower intensity ?eld at
are mounted a plurality of posts 24, offset longitudinally
the electrode on the remote side of the foundation material
of the table 12 to support a wire electrode 25 thereon in
on which the pile surface is to be produced.
It is therefore an object of the present invention to pro
zig-zag formation in a horizontal plane, spaced above and
parallel to the screen 18. The wire 25 carries an inappre
vide a new and improved device for supplying ?ock to a 25 ciable amount of current and may be formed of iron for
foundation material in an electrostatic ?eld.
structural strength. One end of the wire 25 is connected
Another object of this invention is the provision of a
to a terminal 26 of a socket 27 which receives a plug 28
simple and inexpensive device for producing a pile surface
connected to a circuit conductor 29.
on a foundation material by feeding floc‘k thereto in an
The upper portion 19’ of the frame 16 serves as a
electrostatic ?eld.
30 hopper for the reception of the ?bers of the ?ock above
A further object of this invention is the provision of an
the screen 18, with the electrode formed by the wire 25
improved device for applying a pile surface to a founda
in contact with the ?ock or disposed immediately there
tion material by feeding ?ock thereto in an electrostatic
above.
?eld, in which the flock is caused to ?ow through an in
The lower portion 21 of the frame 16 serves as a de
sulating screen by the action of the electrostatic ?eld and
pending skirt below the screen 18, to assist the action of
in which the ?ow is controlled by the initiation and ter
the electrostatic ?eld in guiding the ?ock toward the foun
mination of the ?eld.
dation material and to restrict the ?ow of flock to the
Yet another object of this invention is the provision of
working area.
an improved device for ?ocking a foundation material to
A supporting shelf 31 is mounted between the legs :13‘
produce a pile surface on adhesively coated portions there 40 in horizontal position spaced below the table or platform
of, in which a high intensity ?eld is provided by a limited
12. Inset in the top surface of the shelf 31 is a metal
area electrode disposed adjacent to the flock, which is fed
plate 32 connected to a circuit conductor '33 and form
toward a large area electrode with a relatively low ?eld
ing the bottom electrode for the device. Upon the elec
intensity.
trode plate 32 is shown the foundation material 34 which
These and other objects and features of this invention 45 is ?ocked to produce the pile 35 thereon.
will be readily apparent to those skilled in the art from
A simple schematic diagram of an electrical circuit
the following description of a presently preferred embodi
36 for energizing the electrodes 25 and 32 to establish
ment and the appended drawing thereof in which:
an electrostatic ?eld therebetween is shown in FIGURE 2.
FIGURE 1 isa perspective view of a ?ock applying de
The circuit conductor 33, connected to the electrode plate
vice according to the present invention.
32, has a ‘grounding connection at 37. The circuit con
FIGURE 2 is a vertical sectional view on line 2—2 of
ductors 29‘ and 33 are connected to the secondary winding
FIGURE 1 and showing a simple schematic diagram of the
38 of a high leakage reactance transformer 39, designed
electrical circuit for applying the electrostatic ?eld.
to limit the current which can be drawn therefrom. A
FIGURE 3 is an enlarged detail view showing the
control switch 41 is shown in the energizing circuit for
lower electrode plate and the pile-surfaced material 55 the primary winding 42 of the transformer 39. A diode
thereon.
recti?er 43 is shown in the circuit to conductor 29‘ and
In producing pile surfaces on foundation material the
is preferably a single wave recti?er so that a ?uctuating
?bers used for the flock may be of rayon, nylon, acetates
or pulsating undirectional potential will be applied to
or other synthetic material, or natural ?bers, such as cot
the electrode 25 to facilitate the proper feeding of the
ton. The foundation material is coated with an adhesive
?bers of the ?ock through the screen 18. The potential
on the surface area on which the pile is to be produced,
difference applied to the electrodes preferably has a peak
any desired pile outline being secured by the appropriate
value of the order of 40,000 volts.
application of the adhesive coating, such as to produce let
In-the operation of the device, the hopper provided
tering or artistic ?gures. Many adhesive compositions may
by the upper portion 19 of the frame 16 is ?lled with a
be used including air drying cements, thermosetting and 65 desired flock in loose condition which is held therein by
thermoplastic resins, rubber latex, epoxy resins, and others.
the screen 18. This flock will be in contact with or im~~
The ?bers of the ?ock are ground to relatively short lengths
mediately beneath the zig-zag wire electrode 25. The
in accordance with the depth of pile desired and are pref
foundation material‘ which is to be ?ocked is provided
erably of the order of approximately 0.03".
with an adhesive coating in the outline which it is desired
In the presently preferred embodiment of the invention 70 to have the pile take, for example, lettering, artistic
illustrated in the drawing, the flock applying device is in
?gures, or other designs, and the material is placed upon
dicated generally at 11 and includes a top table or plat- , , the electrode plate 32. Thereafter the switch 41 is
3,096,213
if
thereon; a substantially horizontal electrode plate dis
3
closed to apply a potential difference across the electrodes
25 and 32 which produces a higher intensity ?eld about
posed beneath said screen in a position to accommodate a
material to be ?ocked thereabove; and means for apply
ing a pulsating unidirectional potential across said elec
the legs of the wire electrode 25 than at the relatively
large area plate 32.
The electrostatic ?eld or potential gradient between the
electrodes 25 and 32 orients the ?bers of the ?ock so
that their longitudinal axes are substantially parallel to
the potential gradient and feeds them through the screen
18 onto the adhesive on the material 34, still in upstand
ing position to form the desired pile' The feeding of
trodes to feed the ?ock through the screen to the surface
of the material in pile producing relation.
4. A ?ock applying device comprising: a support; a
circumferentially closed insulating frame of substantial
depth and open at the top and bottom mounted on said
10 support; an insulating screen mounted transversely of said
the flock ?bers through the screen 18 is believed to be
facilitated by the ?uctuations or pulsations in the uni
directional potential applied to the electrodes and this
frame; a conducting electrode mounted in the upper por
tion of said frame above and spaced from said screen and
below the top edge of the frame, the portion of said frame
above said screen constituting a hopper for the reception
feeding of the flock ?bers occurs only while the electrodes
15 of loose ?ock; a conducting electrode mounted beneath
are energized to establish the electrostatic old.
said frame in a position to accommodate a material to be
The switch 41 is opened to de-energize the electrodes
?ocked thereabove; and means for applying a pulsating
when a su?icient quantity of ?ock has been deposited
unidirectional potential across said electrodes whereby to
on the material 34 and this terminates the feeding of
drive said ?ock through the insulating screen into pile
the flock through the screen 18. Any excess ?bers on
non-adhesive coated surfaces of the material 34 will 20 producing contact with the material to be ?ocked.
5. A ?ock applying device comprising: a support; a cir
readily separate therefrom and the material may be
cumferentially closed insulating frame of substantial depth
given any treatment necessary to set the particular ad
and open at the top and bottom mounted on said support;
hesive used to bond the ?bers of the pile to the surface
an insulating screen mounted transversely of said frame
of the material. From the nature of this adhesive this
may be simple air drying, heating or cooling, or a vul 25 in a substantially horizontal plane; an elongated wire elec
trode mounted transversely of said frame in a substan
canizing process.
tially horizontal plane spaced above the plane of said
It will be seen from the above description that this
screen and below the top edge of the frame, the portion of
invention provides a simple and inexpensive device for
said frame above said screen and about said electrode
?ocking a foundation material to produce a pile surface
constituting a hopper for the reception of loose ?ock; a
thereon, which not only provides an effective operation
conducting electrode plate mounted beneath said frame
with a minimum of pants but controls the feeding of
in a position to accommodate a material to be ?ocked
the flock through a normally retaining screen by means
thereabove; and means for applying a pulsating unidirec
of the electrostatic ?eld which orients the ?bers in pile
tional potential across said electrode.
producing relation to the material surface. The upper
6. A ?ock applying device comprising: a support; a cir
wire electrode 25 produces a high intensity ?eld there
cumferentially closed insulating frame of substantial
about because of its small surface area which facilitates
depth and open at the top and bottom mounted on said
the feeding of the ?bers of the ?ock to the foundation
support; an insulating screen mounted transversely of said
material on the relatively large area electrode plate, which
frame and intermediate the top and bottom edges thereof;
has a correspondingly reduced intensity ?eld thereat.
While a certain preferred embodiment of the inven 4:0 a conducting electrode mounted in the upper portion of
said frame above and spaced from said screen and below
tion has been speci?cally illustrated and described it will
the top edge of the frame, the portion of said frame above
be understood that the invention is not limited thereto
said screen constituting a hopper for the reception of loose
as many variations will be apparent to those skilled in
flock; and a conducting electrode mounted beneath said
the art and the invention is to be given its broadest in
frame in a position to accommodate a material to be
tenpretation within the scope of the following claims:
?ocked thereabove, the lower portion of said frame be
I claim:
neath said screen de?ning 21 depending shirt for guiding
1. A ?ock applying device comprising: an elongated
the ?ock in its passage from the screen to the material
‘upper electrode having a small cross-sectional perimeter
compared to its length and disposed in a substantially
on which it is to be deposited; and means for applying a
horizontal plane; an insulating screen disposed in a sub 50 pulsating unidirectional potential across said electrodes.
7. A ?ock applying device comprising: a support; a cir
stantially horizontal plane spaced below said electrode
cumferentially closed insulating frame of substantial
plane and receiving loose ?ock thereon; a lower electrode
disposed in a substantially horizontal plane spaced below
depth and open at the top and bottom mounted on said
support; an insulating screen mounted transversely of
the plane of said screen in a position to accommodate
material to be ?ocked thereabove; and means for apply 55 said frame in a substantially horizontal plane; an elon
ing a ?uctuating unidirectional potential across said elec
gated wire electrode mounted transversely of said frame
trodes to feed the ?ock through the screen to the surface
in a substantially horizontal plane parallel to and spaced
above the plane of said screen and below the top edge of
of the material in pile producing relation.
2. A flock applying device comprising: an upper elec
the frame, the portion of said frame above said screen
trode formed from a wire having generally transverse 60 and about the electrode constituting a hopper for the re
legs disposed in a substantially horizontal plane; an in
sulating screen disposed in a substantially horizontal
plane spaced below said electrode plane and receiving
ception of loose ?ock; a conducting electrode plate
mounted beneath said frame in a position to accommo
date a material to be flocked thereabove; and means for
loose ?ock thereon; a substantially horizontal electrode
applying a pulsating unidirectional potential across said
plate disposed beneath said screen in a position to ac 65 electrodes to facilitate the feeding of the ?ock through the
commodate a material to be ?ocked thereabove; and
screen and its application to the material as an upstanding
means for applying a ?uctuating unidirectional potential
pile.
gradient across said electrodes to feed the ?ock through
8. A ?ock applying device comprising: a support; a cir
the screen to the surface of the material in pile producing
cumferentially
closed insulating frame of substantial
70
relation.
depth and open at the top and bottom mounted on said
3. A ?ock applying device comprising: an upper elec
support; an insulating screen mounted transversely of
trode formed from a wire disposed in substantially zig-zag
said frame in a substantially horizontal plane; a conducting
formation in a substantially horizontal plane; an insulating
electrode mounted in the upper portion of said frame in a
screen disposed in a substantially horizontal plane spaced
below said electrode plane and receiving loose ?ock 75 substantially horizontal plane spaced above the plane of
3,096,213
said screen, said electrode comprising a wire stretching
back and forth across the frame in a substantially zig-zag
formation, the portion of said frame above said screen con
stituting a hopper for the reception of loose ?ock; a con
ducting electrode plate mounted beneath said frame in a 5
position to accommodate a material to be ?ockedthere
above; and means for applying a pulsating unidirectional
potential across said electrodes.
6
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,173,032
2,217,444
2,447,374
Wintermute __________ -_ Sept. 12, 1939
Hill __________________ __ Oct. 8, 1940
2,715,074
Hirschberger __________ __ Aug. 9, 1955
Smyser ______________ __ Aug. 17, 1948
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