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Патент USA US2105275

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Filed Feb.A 2l, 1954
3 Sheets-Sheet 1
Jari». 11,1938.
w. B. THoMP‘soN
Filed Feb. 2l, 1934
3 Sheets-Sheet 2
JM. HQ 1938»
~ 2105,27@
Filed Feb. 21, 1954
3 sheetsèsneet s
fg/ ßf/
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_ 95
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' Patented Jan. 1l, 1.938 .
Fmox spuma-marinus
Wayne B. Thompson, Winchester, Mass., `assign
or to Spray Engineering Compan , Somerville.
Mass.,-.a corporation of Massachusetts'
Application February 21, 1934, Serial No. 712,386
l Claim.
'I'he present invention relates to the art of
`coating and more particularly to apparatus for
applying flock, which term is used herein to desig- '
Fig. 8 is a detail view in plan of the vent valve;
Fig. 9 is a detail view in' elevation of the vent
valve, and
nate lcomminuted material, such as cotton, wool,
Fig. 10 is a detail view in sectional elevation of
silk, rayon, and the dust of vegetable fibres.
~ the vent valve on the line III-ill, Fig. 8.
~ In one commercially successful ilock applying
apparatus the ilock is stored in a container into
‘which air under pressure is introduced. The
container is provided with an outlet through
which the flock laden air is conducted to the point
of application. _The container is provided also
with avent through which some of the air intro
duced into the container escapes to maintain a
low pressure within the container, thus to insure
the action oi' the air on the ilock under velocity
linstead of pressure. Experience has demon
strated that the eüective rate of air flow velocity
should vary with different types of ilock. Heavy
flock and flock having long libres require the use
of a higher rate of air now velocity than does
iight ñock and flock having short libres. 'I'he
ñock applying apparatus referred to was provided
with means for varying the pressure oi' the air
introduced into the container and therefore the
>Referring to the drawings, the apparatus or . _
tool for applying ñock, is preferably provided
with a metallic tank or chamber ii (Figs. 4, 5_
and 6) comprising a. container for a large amount
oi' ñock. After the tank I I is partially filled with
lfiock’its open top is covered by a cover I2. The
interior of the cover I2 is provided with a gasket
i3 to engage the circular top edge of the tank II
and form an air tight joint. 'I'he ‘cover I2 is pro
vided with a series of slotted lugs I4 (Figs. 1 and
6) each of which receives the shank of a bolt i5
which is pivoted between a pair of small plates i6
supported by the exterior surface of the tank il.
The free end of the bolt I5 is screw-threaded and
receives a wing-nut I1 adapted to engage the
lugs Il.
In order to introduce a motive agent,l such as
compressed air, into the ñock tank Il, the appa
ratus is provided with a main air line I8 (Figs. 1
rate of air flow velocity, but this'resulted in the ' and 4) which isconnected to some suitable source
use of an excessive pressure,` a waste of air
oi supply and is provided with a pressure reduc
through the vent, and the discharge of too much
' The principal object of the present invention is
'to provide an apparatus for applying flock by
which _the rate of air i‘iow velocity may be varied
in aneasy, reliable and economical manner.
To the accomplishment'of this object, and such
others as may appear hereinafter, Jthe features oi.'
ing valve I9. The main air line is provided with
a T 20 (Eig. 4) one outlet of which is coupled to
one end oi' Va b_ranch air line 2i passing through
an internally threaded boss 22 formed in the
cover I2.
Within the tank Ii the branch air line 2i is
provided with a T 23, the bottom outlet of which
receives a nozzle“ having a discharge orifice 25
the 'present invention >relate to certain devices, directed vertically downward. The other outlet
combinations and arrangements of parts herein
of the T 23 receives one end of a horizontal pipe
after described and then set forth> in the ap-f’ 26 thel other end of which ñts into a cross 21
pended claims.
'I‘he various features oi' the present invention `
will be understood readily from van inspection of
fthe accompanying drawings, in which,
Figure i'is a view in plan;
Fig. 2 is a detail view in sectional elevation of
, the `nozzle head;
Fig. 3 is a detail view in sectional elevation of
the flock concentrating chamber andthe dome
on the line 3_2, Fig. l;
Fig. 4 is a view in sectional elevation on theline 4-4,Flg.l;
Fig. 5 is a view in sectional plan on the line
I-5, Fig. 4;
Fig. 6 is‘ a view in sectional elevation on the
line ¢-I,F‘ig. l;4
Fig. 'I is .a detail view in
the line 1-1, Fig. 6;
sectional elevation on
' (Figs. 4, 5 and 6).
One outlet of the cross 21
receives one. end of a horizontal pipe 28 the other
end of which is provided with an elbow- 29 which 40
.receives a nozzle 30 provided with a discharge
orifice 3| (Fig. 6) directed downwardly and lat'
er'ally on an angle of 45 degrees. .The bottom'
outlet of the cross 21 receives one end of a verti
cal pipe 33 (Figs. 4 and 6) connected to a hori 45
zontal pipe u through an elbow 3.5. The free
end of the pipe 24 is provided with an elbow Il
which' receives a-nozzle l1 having a discharge ori
‘ ilce 38 directed downwardly and laterally onl an _
angle of 45 degrees. 'I'he remaining outlet of the
vcross 21 is sealed by a plug ll.
With this construction the ‘air discharged into
the- flock, through the» orifices 26, 3| and 38,
causes it to swirl in a ciockwisefdirection, (Fig. l.
5), in the tank II. As the ilock swirls some
'of it is separated from the mass of flock into
external frusto-conical recess 1I. The frusto--.
conical internal passage 15 and the frusto-conical
flock, comxningled with the air, rises and is caused
the common base 59 is the smaller base of each
' particles which commingle with the air.
by the entraining action óf the air to enter a
external recess 1I are reversely arranged so that
lateral passage 45 (Fig. 4) formed between the
cover I2 and the bottom of a casting 4I.
, ‘The casting 4I is provided with a fiat ñoor 42
(Fig. 5) having a vertical, external peripheral
wall 43 projecting upward into engagement with
the bottom of the cover I2 and extending sub
stantially concentric to the internal wall of the
tank II from the inlet 44 of the passage 45 to
a lateral outlet 45 therefrom. Adjacent the out
let 45 the wall 43 terminates in a reverse curve
A15 45 (Figs. 4, 5 and 6) forming a flock concen
trating chamber 41 in which the flock laden air
swirls in a clockwise direction. By swirling the
of the frusta-conical surfaces.
The front end of the passage 55 is lined with
a hollow tube y12 one end of which is provided
with aI ilange 13 engaged with the front end
_face of the cylindrical seat 52. The tube 12 is
provided with a peripheral groove 14 which is 10
engaged bythe rounded end of a screw 15 (Fig.
1), thus rendering the tube readily removable.
The entrance to the cylindrical interior of the
- flock in the tank I I in a. clockwise direction and
by forming' the wall 43 concentric to the internal
wall of the tank II, advantage is taken of the
ï centrifugal action to cause the major part o_f the
particles of flock entrained in the air to engage
and travel along the wall 43 and thus be directed
into the flock concentrating chamber 41. The
25 reversely curved wall 45 causes the flock laden
4air to swirl in the chamber 41 to maintain the
flock delivered thereto in a stirred-up and float
ing condition.
Directly over the flock concentrating chamber
.30 41 (Fig. 3) the cover I2 is provided with an
tube 12 is frusto-conical, the larger base being
adjacent a mixingchamber l15 occupying the 15
space in the passage 55 not lined with the tube 12.
' With this construction the flock laden -air is
delivered from the passage 59 into the mixing
chamber.15 where the flock and the air have 20
an opportunity to expand and then form into
an axial line of iiow through the frusta-conical
entrance of the reduced passage in the tube 12.
When this flock laden air leaves the tube 12 it '
is again directed axially by the frusto-conical 25
surface 15 of the nozzle 53 to the discharged
oriñce 58. Thus, the flock laden air enters the
nozzle head 58 and discharges from the orifice
58 in a common axial line of ñow.
It will be apparent to those skilled in the art 30
that if alll the air introduced into the tank es
therefrom through the dome 49 and from
internally threaded, perforated boss 48 which . caped
the dome to and out of the discharge nozzle 53,
receives the threaded lower end of an elongated
the velocity of the escaping air would bear a
direct relationship to the air pressure inside the 35
tank. But the flock used in' coating the work
dome 49 provided with an internal frusto-conical
passage 55 the larger base of which is at the
35 bottom. Adjacent its upper end the exterior of
the dome 49 is reduced to form a vertical cylin
drical neck 5I and a horizontal shoulder 52.
Projecting laterally from the neck 5I is a short
screw 53 which enters an angular slot 54 formed
varies widely in kind, quality, iineness, weight,
and length of ñbre.
used in handling another type of flock.
40 in one end of a goose-neck 55 which fits over
the neck 5I and seats on the shoulder 52. The
permitting »the ready coupling and _uncoupling
in handling cotton ilock, the rayon flock, due 45
to its weight, would drop out of suspension and
clog the conduit extending from the tank to the
discharge nozzle.
In order to avoid the necessity of relying solely
of the goose-neck 55 to and from the dome 49.
Th'e other end of the goose-neck 55 receives
one end of a flexible conduit 55, (Figs. 1 and 6),
the other end of which fits over one end of a
goose-neck 51. The other end of the goose-neck
on the variation of the pressure lof the air in
51 is coupled detachably to a nozzle head 58
50 in a manner similar to the coupling between the
dome 49 and the goose-neck 55.
The ñock laden air flows out of the chamber
41 into the conduit 55. The purpose of the
dome 45 is to reduce gradually the size of the
55 flock laden air stream‘as itl flows through the
dome 49 into the flexible conduit 55. The pur
pose of the goose-neck 51 is to direct the flow
of the ñock laden air axially into a cylindrical
passage 59 formed in the nozzle head 55. From
60 the passage 59 the flock laden air flows into a
A larger passage 55 terminating on the front face
, _ofthe nozzle head 55.
The 4front face ofthe nozzle head 55 ispro
vided with avtransverse annular seat 5I and
65 a cylindrical seat 52. Rotatably mounted on the
> 'cylindrical seat 52 is a nozzle 53 the rear end
instance, if an Aattempt were made to withdraw
rayon‘- flock from the tank and apply it to a
surface rusing the same air current as that used
screw 53 and slot 54 constitute a bayonet-joint
In consequence a rate of
air flow velocity used in handling one type of
ñock would be inadequate or detrimental when 40
troduced into the tank to obtain different rates
-of air flow velocity in the conduit in which the
flock is conducted to the point of application
to meet the different operation conditions, the
illustrated embodiment ofthe present invention
is provided with a vent whereby a portion of
the air within the tank may be allowed to escape
directly to the atmosphere and thus reduce the
rate of air iiow velocity in the conduit in which
the flock is conducted to the point of use. A 60
valve is provided so that the size of the vent
opening may be varied to provide a delicate con
trol of the rate of air flow velocity in the „air
which entrains the flock and carries lt to the
point of application and thus adapt the appa 65
ratus to the easy, reliable and economical han
>`dling of all types of flock.
The floor» 42 (Fig. 5) is provided with a- ver
face 54 of which engages thetransverse seat 5I. . tical, internal peripheral wall 11 having the same
The nozzle 53 is coupled to the nozzle’head 55
by an internally threaded ring 55 provided with height as the wall 43 and spaced therefrom lto 70
form the .side wall of the passage 45 for a por
70 an inturned flange, 55 arranged to engage a pe
tion of its extent. One end ofthe wall 11 ter
ripheral shoulder 51 formed on the nozzle 53.. >ininates
at the outlet 45. The other end of the
The nozzle 53 is provided with a central dis
wall 11 terminates at a point spaced from the end
charge oriñce 55 formed inthe common base 59 of the wall 45. For the major portion of its 75
75 of’an internal frusto-conlcalpassase 15 and an
2,105,275 .
length the wan A11- is" concentric >to the wan as
, but is provided with a straight portion 18 which
is directed at the’ juncturebetween the walls 43
- and 46. The wall 11, the portion .of the iioor 42
enclosed thereby, and the cover I2, form a central
« filter chamber 19. The casting 4| is bolted to
the bottom of the cover I2 by three bolts 88, two
of which pass through the wall 43. and the third
one of which passes through the wall 11.
10 -Directly over the filter chamber 19 the cover I 2
is provided with a cylindrical-opening 8| (Figs. 4
and 10) and three screws 82. (Figs. 8 and 9). the
heads 83 of which are elevated above the cover
I2. , Mounted on the screws 82 and engaged with
the exposed face of the cover I2 is a triangular
gasket 84 (Figs. 9 and 10) having an opening 85
smaller than the opening 8|`but concentric there
with.' Mounted on the screws 82 and engaged
with the exposed face of the gasket 84 is a tri
20 angular plate 86 having an opening 81 smaller
than the opening 85 but concentric' therewith.
>The opening 81 may be closed or varied in size
by a gate valve 88 one end of which is pivoted on
one of the screws 82 and the other end_of which
25 is provided with an operating finger piece 89 mov
v able between the other two screws 82.
vWhen the
iìnger piece 89 engages one screw 82 as in Fig.
. 8, the opening 81 isclosed by the gate -valve 88.
When the ilnger plece- 89 engages the4 other
30 Ascrew 82 the opening 81 is uncovered by >the gate
valve 88. 'I'he finger piece 99 may be moved into
a position intermediate the two adjacent screws
82 to vary the effective size of the opening 81.
'I'he finger piece 89 travels beneath a strap 98
loosely mounted on the two adjacent screws 82.
'I‘he three Screws 82 loosely support a cap 9|.
In order to force the cap 9| against the heads 83,
the gasket 84 against the cover I2, and the gate
valve 88 against the plate 88, the screws 82 are
40 each provided with a coiled spring 92 one of which
is interposed between the -pivoted endI of the gate
. valve 88 and the cap 9| and the other-two of
which are interposed between the strap 98 and the
cap 9|.
When the gate valve 88 is positioned to close
-the opening 81 all of the air introduced into the
tank || in escaping to the atmosphere must pass
under its maximum rate of velocity through the
discharge nozzle 63. When the gate valve 88 ls
chamber 19 wherein the flock is _ill/tered out of
the entraining air seeking to escape from the
tank || through the vent 81 either by falling out
of the air stream or by being stopped by the screen
93. LIn any event the ñock laden air vented _out UI
of the tank 'II through the vent 81 leaves the
flock behind in the ñlter chamber.
As so vfar described >the air introduced into the
v:Ilockthrough the oriñces 25, 3| and 38 stirs up
and swirls the flock in the tank II in a clockwise 10
direction, (Fig. 5) ,~ separates >ñoating particles
therefrom'and then, under velocity, carries the
floating particles in 'a dense cloud into the lat
eral passage v48. Some of these particles col
lected in the passage 48 are discharged from the
nozzle 63 by the entraining action of the air dur
ing its'escape from the tank I| by way of the '
chamber 41. Some of the particles collected in
the passage 48, instead ot passing out of the tank
II to the nozzle 63, are carried by the entraining
air into the iìlter chamber 18. These last named
particles are removed from the air by the screen
93 .and either accumulate upon the screen or
fall upon the iioor of the illter chamber. Still
others of the particles of flock collected in the
passage 48A are carriedl by the entraining air ‘
through the outlet 45 back into the tank ||.«
In order to break up any lumps of flock which
may be carried out of the tank II the passage 48
may be 4provided with a coarse screen 96 (Figs. -
5, 6, and '1). The screen 86 extends vertically
from the floor 42 to the bottom of the cover I2
and laterally from the wall 43 to the wall 11. The
screen 96 is soldered and braced to one end of a
plate 91 the other end of which is bent to form
a clip 98 embracing the edge of the ñoor 42.
In order to stir up the flock collected on the
floor of the passage 48> and send the stirred-up
ñock into the air stream ñowing therethrough,
_thereby to intensify the density of the flock laden
air seeking an outlet from the tank I I, to prevent
`the flock from accumulating and> plugging the
passage 48, and to drive lumpy ñock against the
screen '86, the main air line I8 is provided .above
>the cover I2 with a cross 99 (Figs. l, 4, and 6) to
one outlet of which a branch air line |88 is con
nected. . 'I'he branch |88 passes through an in
ternally threaded, perforated boss |8| on the
I2 into the tank II where the branch |88
positioned to uncover the opening 81 a portion of >is provided with an elbow |82 (Figs. 6 and 7)
the air introduced into the tank is vented to the . 'which receives a nozzle |88 having an orifice |84
atmosphere through the opening. In conse 4 discharging directly into the passage 48.A With
quence the ñock laden air flows under its mini
this construction the door ofthe passage 48 and
mum velocity to and out of the discharge nozzle the jet of air discharged by the ermee |04 mio the _ '
63. By varying the size of the opening 81 from inlet 44 of the passage 48 not only constitute an
its minimum` to its maximum, or any effective _intensiñer for intensifying the ñock laden air
size therebetween, the rate of velocity at which flowing from the tank I I through the passage 48,
the :Hock laden >air is discharged from theltank but also -act; to prevent it from becoming choked
|| to and out 'of the discharge nozzle 63 may be by an. accumulation o1' flock. ,As indicated in
GO varied to meet theexisting operation condition.
Fig. 5 the elbow |82 may be rotated to vary the
When a portion of the air introduced into the direction at which the jet of_ air is discharged (il)
A` y -tank II is- allowed to escape into the atmosphere
through the vent 81 it is desirable to ñlter the
from the oriñce |84. f
In order to prevent the‘ilock collected on the
ñock out of the air before it escapes.
' 'I'he ñock is filtered out of theair escaping from
f screen ’93 or the floor of the ñlter chamber 19 from
_ the tank IL through the vent 81 by a screen 93 -
stir the flock up in the ñlter chamber 19, whirl the
(Figs. 4 and A10) supportedfrom a frame 94 in
terposed between the screen and the heads of
accumulating sumciently to choke the vent 81, to
stirred-up flock into` the' flock concentrating
chamber 41, and thereby intensify the density of
‘ screws 95 which secure the' frame and the screen ' the ñock laden air escaping from the chamber 41
to the bottom `of the cover I2. With this _con
struction that portion of the flock laden air whichenters the passage 48 'from the tank i I and which '
to the nozzle 63, another outlet of the cross 99 '
(Fig. 1) is connected to a branch air line |85
which passes into the tank Il through an in
docs‘not enter 'the flock concentrating chamber i ternally threaded, perforated boss |88 (Figs. 4
41 `and does not pass back.y into the tank I I through »and 6). Within the tank II the branch I85’is
the outlet 45 of .the passageg48, enters the ñlter ` lprovided with an elbow |81 which receives a noz
zle |08 located in the filter chamber 19 adjacent
the junction between the outlet 45 and the verti
cal wall 11, and provided with an oriñce |09 (Fig.
5). With this construction the jet of air dis
Ui charged into the filter chamber 19 through the
the groove |20 is a horizontal passage | 2| formed
in the nozzle head 88.
The passage |2| communicates with a vertical
passage |22 which communicates in turn with a
horizontal passage |28. Air is delivered to the Ul
passage |23 through a short pipe |24 (Fig. 1) cou
pled to the front end of a metallic body |25 which
orifice |09 stirs up the ñock in the chamber, whirls
the flock therein in a clockwise direction, (Fig. 5), ' has integral therewith a handle or grip |26. 'I'he
separates floating particles from- the whirling
flock, and carries the floating flock by the en
air under. pressure is preferably introduced into
the body portion |25 through the grip |26 which
training and centrifugal actions of the air dis
is connected to one end of an air hose |21 through
charged from the orifice |09 along the wall 11, a. coupling |28. The other end of the air hose |21
from the straight portion' 18 of which the ñock
laden air flows towards the flock concentrating is‘connected to >one outlet of a T |29 carried by
main air linelll.
chamber 41. Some of the flock discharged from theThe
passage ofthe air through the body por
the illter chamber 19 passes back into the tank l l ' tion |25 is controlled by a normally closed main
through the outlet 45, but >most of it is carried air valve (not shown) the stem |290 of which is
into the flock concentrating chamber 41 in which arranged to be engaged by a trigger |30, at the
it is whirled and from which it is discharged to will of the operative, to depress the stem |290
the nozzle 63. The filter chamber 19 and the jet
and thus open the main air valve. The upper end
of air discharged from the orifice >|09 not only of the trigger |30 is provided with a yoke |3I
constitute an intensifier for intensifying the flock which embraces the body portion |25 to which
laden air passing out of the chamber 41 to the the yoke is secured in a pivotal manner. '
nozzle 63, but also act to prevent the ventoutlet
The .volume of air discharged through the ori
81 from becoming choked by an accumulation of fices ||1 is controlled by'a spindle |32 (Fig. 2)
flock in the filter chamber 19.
' ‘
the point of which has a valve seat engagement
From an inspection of Fig. 5 it is apparent that with the wall of the vertical passage |22 just be
at least some of the flock in its travel from the
low its point of confluence with the passage |23.
tank | I to the nozzle 63 by way of the chamber 41
The spindle |32 is threaded into the nozzle head
is subjected to three distinct-whirls,-the whirl 58 and is provided with a milled head |33 to fa
30 in' the tank || being the greatest in extent, the
cilitate its adjustment. Colled about the spindle
whirl inthe chamber 41 being the least in ex
|32 and interposed between the nozzle head and
tent, and the whirl in the filter chamber 19 being
intermediate in extent, and that the apparatus is
designed to take advantage of the centrifugal ac
the head |33 is a spring |34 acting to hold the
tion developed during each whirl. The air which
trolled: by the spindle |32. When' the spindle |32
spindle |32 in any desired position of adjustment.
The shape of the discharged material is con
flows to the nozzle 63 by way of the chamber 41
is delivered ~from the orifices 25, 3|, 38, |04 and
|09. The air from the orifices 25, 3| and-38 be
is engaged with its valve seat the target formed
by the discharged material is circular. By ma
nipulating the spindle |32 the shape of the target
formed by the discharged material may be varied 40
from a» circle to an ellipse._ In the showing of
Fig. 2 the orifices are arranged vertically, thus
providing for the flattening of the discharged
material into a horizontally arranged fan. By
loosening the ring65 the nozzle 63 may be angu 45
larly adjusted to obtain the fan in any desired
To operate the apparatus the tank || is filled
tol within not less than six inches from its top
with clean, dry flock, and the cover I2 secured in
place. With the valve ||0 closed andthe valves
||2 and | I5 opened, a main alr valve- |35 (Fig. l)
is opened to admit air under the pressure deter
comes laden with flock in the tank ||. The air
40 from the orifice |04 becomes laden lwith flock in
the passage 40. The air from the orifice |09 be
comes laden with flock in the filter chamber 19.
All the flock laden air from the three different _
sources which pass into the chamber 41 unite
45 therein to produce a discharge of concentrated
flock from the nozzle 63.
In order to vary the pressure of the air intro
duced into the tank, the passage 40 and the ñlter
chamber 19, as may be .desired to meet> the differ
ent operating conditions and to obtain the desired
' volume of flock with the particular type thereof
being handled, the three branch air lines 2|, |00
and |05 are provided >with control valves. The
mined by the pressure reducing valve I9 into the
apparatus from the main air line I8. The valves
air flowing through the branch 2l is controlled by
a valve ||0, (Figs. 1 and 4). The pressure in the
air delivered to the'branch 2| through the valve
||2 and ||5 are adjusted to obtain differential
||0 is registered on a gage ||I connected to the
top outlet in the T 20. The air flowing through
the branch |00 is controlled by a -valve I|2 (Figs
1 and 6). The pressure in the branch |00 is reg
istered on a gage |-|3 fitted into a T | I4. The air
flowing through the branch |05 is controlled and
its pressure is registered by a valve ||5 and a
gage’l I6, respectively, (Fig. 1).
In order that, the flock discharged axially-of t
the nozzle discharge orifice 68 may be ñattened,
the walls of the frusto-conical recess 1| are pro
vided wìth a pair of diametrically opposite ori
fices I I1 (Fig. 2) lthrough which air is discharged
supplementally upon the main discharge. Each
orifice | I1 is formed in the »f-ront end of a passage
||8 which communicates through a passage ||9
with an annular groove |20 formed in the rear
75 end‘face of the nozzle 63. Communicating with
pressures in the branches l|00 and |05, respective
ly, in accordance with the kind of flock with
which the tank || is filled. Assuming that the
main airline pressure is over sixty pounds per
square inch, for instance, the pressure of the air
introduced into the tank through the branch |00
should be varied from fifteen to forty-five pounds '
per square. inch and the pressure of air introduced
into the tank through the branch |05 should be 65
varied from five to forty-uve poundsper square
inch depending upon the type of flock in the tank.“
The gate valve 88 is adjusted to obtain the proper
sized opening for the vent 81 and thus determine
the rate of airflow velocity through the conduit
connecting the dome 49 and the nozzle head 58.
For‘cotton flock the vent 81 should be substan
tially uncovered. For rayon ñock the vent 81
should be substantially closed. , The effective size
of the vent'81 should be varied to accommodate 7n
the apparatus to the particular type of flock
> ployed. Then the valve ||0 which controls 'the~
volume of the flock laden air discharged is opened
gradually until a pressure substantially less than
ñve pounds per square inch is indicated on the
gage i l l, whereupon the flock is discharged from
' the nozzle 63 in a turbid condition.
As the tank
empties, the va1ves'88, |10, ||2 and H5 may- be
.l re-adjusted to maintain the desired character of
10 flock discharge.
_ v
To apply the Hock, the work is coated :with `a
suitable adhesive. The' handle |26 of the appa
ratus is engaged in the palm of the operative’s
- hand with the index and adjacent fingers thereof
engagedwith the trigger |30. .. By manipulating
duit 56 the oppositefends of a wire |36 are con
nected to the goose-necks v55 and 51,'the tank ||
being grounded by a wire |31 (Fig.- 6) .` -
Nothing herein explained is to be interpreted
as limiting the various features of the presentin 5
ventlon in the scope of its application to use'in
connection with the particular'apparatus or the
`particular mode of operation or both selected for
purposes of illustration _and explanation. -While
the particulars of construction herein set forth 10
Vare well suited toone mechanical form of the
invention and to the use to which it is put, it is
not limited to this use. nor to these details of
construction, norto the conjoint use of all its
features, nor is it to be understood that these par
the gun body |25y the ñock ñowing out of the ' ticulars are essential since they may be modified 15
nozzle 631s applied to the surface of the coated
work, care being taken to drive the ñock into 'the
adhesive of the previously coated Work. In order
20 to prevent `the formation of ñock mounds on the
lwork the operative, after each ñock applying op
eration, directs the i'lock slantwise at the work-
within the skill of the artisan without departing -
from the true .scope of the actual invention, char
acterizing features of which are set forth in the
following claim by the intentional use of generic
terms and expressions inclusive of various modi
with the result that the `excess ñock is blown
What is claimed as new, is:
therefrom and subsequently recovered for re-use.
An apparatus for applying flock having, in com
25 Usually it is necessary to apply successive coats of
bination, a nozzle, a. vcontainer for the flock, an
flock to the adhesively coated work in outlet from the container in communication withl 25
obtain an even surface having a velvety or cloth V the nozzle, means _for introducing air under pres
like appearance. Whenthe flock applying opera
sure into the container and discharging the air
tion has been completed the main valve |35 may against the iiock to impart movement thereto,
be closed and the trigger |30 may be operated to Y mieans for varying the air pressure, and separate
utilize the supplemental air jets issuing from the meansfor varying the velocity _of the air `flow 30
orifices ‘I I1 for dusting oiï the excess flock.
through the outlet.
In order to dissipate the statica] electricity gen
erated bythe passage of flock through the con- '
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