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Патент USA US2127128

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Aug. 16,1938.
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R.‘ G. MARTIN
STENCILING
APPARATUS
Filed May 10', 1937
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2,127,128
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2 Sheets-Sheet 1'
1322-1
27
35
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IQN VENTOR
R. G.Martz'n,
Aug. 16, 1938.
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‘
R. G. MARTIN
.
2,127,123
-STENCILING APPARATUS
_
Filed May 10-, 1957
2 Sheets-Sheet 2
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11v VENTOR
R. G.Mart_z'n,
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KW‘? ’
ATT I NEKS
Patented ' ‘Aug. 16, 1938
' 2,127,128
UNITED STATES "PATEN
OFFICE ‘
2,127,128
STENCILING APPARATUS
>
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Raymond G. Martin, -Washingto_n, Pa., assignor
to Solar Laboratories, a corporation oi’ Penn
sylvania
Application May 10, 19318611311“). 141,672
11 Claims.
The present invention relates to improvements
(Cl. 101-414)v
_
.
rock-shaft I4 which is journalled at its ends in
in stenciling apparatus and more particularly to
an apparatus which is primarily designed for
bearings l5.
commercial use in stencillng circular or substan
of the table in, is substantially coextensive there
with, and rockably supports the inner or rear
tially circular designs of vitreous enamel on the
'
The rock shaft l4 extends across the rear edge
peripheral areas or regions of vitreous or ceramic
end of a stencil screen assembly l6.
articles such, for example, as plates, dishes,
A forwardly extending squeegee assembly I‘! is
similarly supported upon the rock-shaft H. The
assemblies I6 and I1 overlie the table ID.
The stencil screen assembly (Figs. 1 and 3) Ill 0
consists of a triangular plate l8 having integral
saucers and the like.
The apparatus may, how
ever, be employed in applying a circular design
10 by a stenciling process to any article capable
_
of receiving the same. The invention is con
cerned with stenciling apparatus of the type em- - aligned sleeves l9 formed thereon through which
ploylng a mesh screen,.portions of ‘which are left
open to form the design to be imparted to the
15 articles, and in which a vitreous enamel prepara
tion is poured upon the screen and uniformly
spread over and forced through the open portions
of the screen and onto the articles by a rubber
squeegee.
20
,
-
pin 22, the lower endof which serves to support
‘The principal object of the invention is to pro- - thereon, by means of anti-friction bearings 29, a
vide an apparatus for stenciling which will e?’ec- - central hub member 39 in the form of a circular
tively apply to the articles being treated a con
tinuous closed design in such a manner as to
leave no trace of overlap in the design, yet which
25 will insure a closed design having no gap ap
' parent therein.
It is another object of the invention to provide
a stenciling machine of the type set forth above
which is designed for stenciling the peripheral
30 areas of plates, dishes, saucers and the like, in‘
which there is incorporated a novel means for
supporting the articles to be decorated in rolling
line contact with the stencil screen.
Other objects of the invention will become more
35
the rock-shaft l4 extends. The plate is centered
upon the rock-shaft M by means of collars 20
mounted on the rock-shaft outside of and abutting 15
the sleeves IS. The plate I8 is provided with a
forwardly extending supporting arm 2! from
which there depends adjacent its free end a pivot
readily apparent hereinafter.
In the accompanying drawings:
Fig. l is a longitudinal vertical sectional view
taken substantially centrally through an ap
- paratus manufactured in accordance with the
.
40 present invention;
Fig. 2 is a fragmentary vertical sectional view
taken through a portion of the apparatus show
ing a modi?ed form of article support;
'
Fig. 3 is a top plan view of the apparatus;
Fig. 4 is a sectional view taken substantially
45
_ along the line 4—4 of Fig. 1; and
Fig. 5 is a sectional view taken substantially
along the line 5-5 of Fig. 3.
The stenciling apparatus is in the form of a
machine involving in its general organization a
support or table Illv provided with front and rear '
supporting legs II and i2 respectively. Bolted
or otherwise secured to the upper surface of the’
table II! are a pair of standards N which serve to
support between their upper ends a horizontal
ring, and in which ring the bearing 25' is ?tted.
The hub member 39 is nested within an inner ring
68 or collar of a stencil screen unit 24. The hub
member 39 and ring 68 are maintained in posi
tion, one within the other, by means of acircu
lar face plate 69 which is secured to the upper
surfaces of these two members.
The stencil screen unit 24 also includes an outer
ring 25 which is concentric with the inner ring‘ 30
68 and is connected thereto by means of a single
radial arm or spoke 26 integrally formed on the
face plate 69. A ring-like operating wheel .21
encircling and concentric with the stencil screen
unit 24 is maintained in spaced relation to the
screen ring 25 by spokes 28. A silk stencil screen
S or other conventional screen having impervious
portions and pervious portions, the latter rep
resenting the design to be stenciled on the articles,
extends across the opening existing between the
inner ring 68 and outer ring 25 and is'secured to
both of these members in any suitable manner as,
for example, by gluing. The level of the inner
ring 68 is slightly below the level of the outer ring
25. Thus the stencil screen assumes an obtuse
taper or frusto-conical form which is designed to ,
accommodate the tapered or frusto-conical sur
faces of the articles undergoing decoration, as
will presently appear.
Referring now to Figs. 1 and 3, a forwardly ex 50
‘tending bracket 30 is secured to a cross bar 3i
which extends across the standards l3 and is
provided at its forward end with a downwardly
vturned arcuate plate 32 having a slot 33 formed
therein. A pair of limit stops 34 in the form of 55
2
2,127,128
nut and bolt assemblies are adjustably mounted
swing the two assemblies l6 and i1 upwardly
on the plate 32 and are slidable laterally of the
about the axis of the rock-shaft |4 when de
apparatus in the slot 33. A pair of circumferen
tially adjustable abutments 35 in the form of
nut and bolt assemblies are adjustably secured in
slots 36 formed in the operating wheel 21 and
their relative positions on the wheel 21 ‘are de
termined by the character of the articles under
going decoration and in a manner presently to
be described. The limit stops 34 are positioned
in the path of movement of the abutments 35
by the squeegee blade 15 upon the screen S. -
and are designed to be engaged thereby to limit
the amplitude. of the oscillation of the stencil
supporting structures are disclosed, either one
screen unit 24.
being suitable for rotatably supporting an article
In order to adjust the level of the stencil screen
15
pressed by the foot of the operator. In order to
return the squeegee S’ to its normal screen-en
gaging position, a coil spring 52, centered upon a
pin 53 carried by the arm 2| and passing through
the plate 4|), bears against the plate 40 at one
end thereof and against a wing nut 54 at the
other end thereof. Adjustment of the wing nut
54 will lessen or increase the pressure applied
In the present instance, two forms of article
a forward extension 85 of the cross bar 3| and
P (which may be a plate or the like) in such a
manner that its peripheral regions make, tangen
tial rolling line contact with the underneath sur~
engages the underneath side of a limit stop 38
face of the stencil screen S.
unit 24, an adjusting screw 31 extends through
'
mounted on the underneath side of the plate l6.
20 By turning the adjusting screw 31 in one direction
In Fig. 1, the supporting means for the articles
P comprises a plurality of supports 66, 6| and
or the other, the entire screen unit 24 will be
62 which extend through and are horizontally
and vertically adjustable in a plurality of radial
slots 63 formed in the table portion ID of the
apparatus. The upper ends of the supports 60
have yokes 64- formed thereon. The supports 60
and 6|, together with the yokes 64 thereof, are
identical in construction and each yoke serves to
pivotally support a bracket‘ 65 upon which there
is rotatably mounted a grooved wheel or roller
66 adapted to engage the extreme rim of the
elevated or lowered as the case may be.
‘The squeegee assembly |1 consists of a tri
angular plate 40 having integral aligned sleeves
25 4| formed thereon through which sleeves the
rock-shaft |4 extends. The plate 40 overlies the
plate I8 and is centered upon the rock-shaft l4
by means of collars 42 mounted on the rock-shaft
inside of the sleeves 4|. The plate 40 is pro
30 vided with a forwardly extending arm 43 having
a longitudinal slot 44 formed therein. An adjust
ing screw 45 extends through the end of the arm
43 and projects into the slot 44. A squeegee sup
porting rod 46 is provided with a squared end
35 86 that is adjustably mounted in the slot 44 by
means of a clamping nut 41. The end of the
adjusting screw 45 projects into, and is rotatably
secured in, the squared end 86 or’ the rod 46 ad
jacent the top thereof, by means of a pin and,
40 groove connection 48. Thus it will be seen that
,the longitudinal position of the squeegee sup
porting rod 46 may be adjusted by loosening the
nut 41 and turning the adjusting screw 45 in
one direction or the other, while at the same
time turning of the rod 46 in any adjusted posi
tion thereof is prevented.
'
Suspended from a bracket 49 carried by the
. lower end of the squeegee supporting rod 46 is a
support the same. The rollers 66 are normally
urged inwardly of the plate P toward a common
center by means of coil springs 61 which are
anchored at their lower ends to plates 10 which 35
are secured in position on the table In by means
of nuts 81 mounted on the supports 60 and 6|,
and at their upper ends to extensions 1| formed
on the brackets 65. The yoke 64 of the support
62 is in the form of a clamping yoke and serves to 40
adjustably support therein a roller support 12
which carries at its outer end a ?anged roller 13
adapted to adjustably support thereon the pe
riphery or rim of the article undergoing decora
tion. It is to be noted that the elevation of the 45
rollers 66 and 13 in the apparatus is calculated
so that the plates supported therebetween oc
cupy an inclined position with the peripheral
ment in the bracket 49 by means of a clamping
regions or rim portions thereof in tangential
rolling line contact with the underneath surface
nut and bolt assembly 50.
of the screen.
squeegee S’ which is capable of angular adjust
50
‘article P undergoing decoration and rotatably
,
In Fig. 2, the ‘supporting structure for the
"The squeegee S’ is designed to sweep the pe
ripheral regions of the stencil screen S and in
order to adjust the squeegee S’ ‘to the stencil
screen S and obtain the proper degree of pres
55
sure thereon, an‘ adjusting screw 5| passing
through the plate 46 of the squeegee assembly |1
engages the arm 2| of the stencil screen assembly
ed for angular adjustment upon a bracket 18.
The bracket 16 is supported upon the table
|6.
The squeegee assembly I1 is capable of being
portion ill of the apparatus and the position
thereof may be adjusted longitudinally of the
elevated by the operator in a manner subse
quently to be described,‘to cause the squeegee S’
to clear the screen S. Toward this end, a series
of counterweights 55 suspended from a short arm
56 formed on one of the sleeves it! provides a
‘counterbalance for the entire stencil screen as
table ID by means of clamping nut and bolt as
60
sembly l6. A similar series of counterweights 51
article P consists of an article-supporting chuck
15 which is rotatably mounted by means of anti
iriction bearings 16 upon the upper end of a
short chuck supporting stem 11 which is mount
semblies 19 that extend through‘ the bracket
18 and through a slot 80 provided in the table.
The chuck is provided with a plate receiving
recess 8| in the face thereof to accommodate
the base of the plate or other article under-.
goingdecoration. Not only is the inclination of.
suspended from a‘ short arm 58 formed on one the chuck 15 adjustable to adapt the peripheral
of the sleeves 4|, provides a counterbalance for» - regions of the article to the stencil screen in the
the entire squeegee assembly H. A treadle mech
anism (not shown) which projects forwardly of
the machine adjacent the bottom thereof in a
convenient position for the operator of the ma
chine, operates through a link 59 attached to a
75 short arm 66 formed on the other sleeve 4| to
manner previously described, but, in addition,
the chuck 15 is removable from the bracket 18 '
for the purpose of interchangeability to permit
chucks of different sizes 'to be installed in the
apparatus.
In the operation of the apparatus, the proper 1.
i
2,127,128
adjustment of the article supporting assembly
shown in Fig. 1 or of the assembly ‘shown in
Fig. 2, as the case may be, is made so that the
article is brought into register with the stencil
screen S with the peripheral rim portion thereof
in tangential rolling line contact with the under
neath surface of the screen. The screen S is so
designed that the arcuate extent of the pervious
portion thereof which represents the design to
be applied to the articles, is‘ equal to the cir
cumference of the closed design when applied
to the rim portion of the articles. The cir
cumferential positions of the abutments 35 are
calculated so that the amplitude of oscillation
of the stencil screen unit 24 from one extreme
position thereof to the other extreme position
thereof, will carry the pervious portion of the
screen into contact with the rim portion of the
'article throughout its entire length, no more
20 and no less. A small quantity of a suitably
colored, ?nely ground, vitreous enamel ,compo
sition is applied to the stencil screen 8 in the
usual manner, and the screen unit is caused to
move from one extreme position thereof to the
25 other extreme position thereof. The squeegee
. S’, being in contact with the screen S, sweeps
the pervious portion or design of the screen and
forces a portion of the enamel through the
screen and onto the rim portion of the article.
30 After the design has thus been applied to the
article in this manner, the operator depresses
the foot treadle mechanism which, through the
> medium of the link 59,. tilts the entiresqueegee
assembly I‘! about the axis of the rock-shaft
35 i4 and elevates the same. Upon such elevation of
the squeegee assembly H, the coil spring 52 is
compressed and the squeegee is caused to clear
the stencil screen and enamel thereon.
40
Move
ment of the. squeegee assembly upwardly be
yond the limit of compression of the spring 52
serves to carry the stencil screen assembly I6
upwardly in order that the operator may have
access to the decorated article P and substitute
an undecorated article in its stead. Upon release
of pressure upon the foot treadle mechanism, the
stencil screen and squeegee assemblies It and
H are lowered into operative decorating‘ posi
tion with the squeegee in contact with the sten
cil screen S and with the screen in- tangential
55
60
C51 Lil
70
75
' 3
the circumference of the closed design, means
for supporting an article to be decorated for
revolution about its axis, means for supporting
said screen for revolution about its central axis
with the article and screen in rolling line con
tact with each other, and means for forcing
coloring material through said screen upon oscil
lation of the same.
3. In a stenciling apparatus, a stencil screen
provided with a generally arcuate pervious por l0
tion extending around. a portion of the periph
ery thereof and representing a closed design to
be applied to the peripheral rim portion of a
saucer-like article, the mean extent of said
arcuate pervious portion being equal to the mean 15.
circumference of the closed design, said pervious
portion of the screen being con?ned within an
area of the screen which is a frustum of an
obtuse cone of less angularity than the angu»
larity of the obtuse cone within. the surface of 20
which the peripheral rim portion of the article
lies, means for supporting said screen for oscil
lation about its central axis, means for sup
porting said article for revolution about its axis
with the frusto-conical peripheral rim portion 25
thereof in rolling line contact with said screen,
and means for applying decorating material
through said screen and onto said peripheral
rim portion.
'
4. In a stenciling apparatus, a stencil screen 30
provided with a generally arcuate pervious portion
extending around a portion of the periphery
thereof and representing a closed design to be
applied to the peripheral rim portion of a saucer~
like article, the mean extent of said arcuate per 35
vious portion being equal to the mean circumfer- '
ence of the closed design, said pervious portion of
the screen being con?ned within an area of the
screen which is a frustum of an obtuse cone of
less angularity than the angularity of the obtuse 40
cone within the surface of which the peripheral
rim portion of the article lies-means for support
ing said screen for oscillation about its central
axis, means for supporting said article for rev0-_
lution about its axis with the frusto-conical pe 45
ripheral rim portion thereof in rolling line con
tact with said screen, a squeegee in stationary
contact with said screen for applying decorating
material through said screen and onto said pe
rolling line contact with the peripheral regions
of the substituted undecorated article P. The . ripheral rim portion, and means for adjustably
varying the amplitude of oscillation of said screen.
screen unit 24 is oscillated in the reverse direc
v5. In a stenciling apparatus, a stencil screen
tion and the stenciling operation is repeated.
Modi?cations may be resorted to within the provided with a generally arcuate pervious por
tion extending around a portion of the periphery
spirit and scope of the appended claims.
thereof and representing a closed design to be
I claim:
‘
1. In a stenciling apparatus, a stencil screen applied to the peripheral rim portion of a saucer
like article, the mean extent of said arcuate per
provided with a generally arcuate pervious por
vious portion being equal to the main circumfer
tion extending around a portion of the periph
ery thereof and representing a closed design to ence of the closed design, said pervious portion of 60
be applied to the peripheral rim portion of a the screen being con?ned within an area of the
saucer-like article, the extent or length of said screen ‘which is a frustum of an obtuse cone of
less angularity than the angularity of the obtuse
arcuate pervious portion being equal to the cir
cumference of the closed design, a squeegee for cone Within the surface of which the peripheral
said screen, and means for supporting said screen rim portion of the article lies, means for support
and an article to be decorated with the screen ing said screen for oscillation about‘its central
and peripheral rim portion of the article in axis, means for supporting said article for revolu
tion about its axiswith the frusto-conical pe
rolling line contact.
2. In a stenciling apparatus, a stencil screen ripheral rim portion thereof in rolling line con
tact with said screen, a squeegee in stationary 70
provided with a generally arcuate pervious por
contact ‘with said screen for applying decorating
tion extending around a portion of the periph
ery thereof and representing a closed design material through said screen and onto said pe
to be applied to the peripheral rim portion of ripheral‘ rim portion, an actuating member sur
a saucer-like article, the extent or length of rounding said screen and substantially concentric
said arcuate pervious portion being equal to therewith, and a pair of limit stops mounted for 75
4
2,197,128
circumferential adjustment on said actuating
line contact with the rim portion of an article
member and designed to engage a stationary part
to be decorated, and means for forcing coloring
of the apparatus to vary the amplitude of oscilla- - material through ‘said screen andonto the rim
portion of the article from the inside thereof.
9. In an apparatus for stenciling continuous de
of designs to the peripheral rim portions of plates, signs on the frusto-conicai rim portions 0! saucer
saucers and the like by a stenciling process, a like articles, a frusto-conical stencil screen, means
frusto-conical stencil screen having a generally - for mounting said screen in tangential rolling line
arcuate pervious portion extending around the contact with the rim portion of an article to be
ii) side thereof, the mean extent of said arcuate por
decorated, a stationary squeegee in contact with
tion being equal to the mean circumference of said screen along the line of contact between the
said closed band of designs to be applied to the article and screen, and means for limiting the
peripheral rim portion of an article, means for extent to which said screen and article may roll
mounting said screen for oscillation about its axis, upon each other.
means for mounting said article for rotation
10. In an apparatus for stenciling continuous 15
about its axis, means for raising and lowering said designs on the irusto-conical rim portions of sau
screen into and out of tangential rolling line con
oer-like articles, a frusto-conical stencil screen,
tact with said rim portion of the article, and‘ means formounting said screen in tangential roll
tion of said screen.
in
,
6. In an apparatus for applying a closed band
means for applying coloring material through said
ing line contact with the rim portion of an article
pervious portion of the screen upon oscillation of
to be decorated, a stationary squeegee in contact 20
the screen in either direction.
7. In an apparatus for stenciling continuous
designs on plates and like articles, an article sup
port comprising in combination a plurality of
with said screen along the line of contact between
the article and screen, and means for adjustably
regulating the extent to which said screen and
supporting rollers adapted to engage the rim of
a plate to be decorated at spaced points there
around, one of said rollers having a cylindrical
side upon which the margin of said plate is adapt~
ed to be supported and an annular ?ange against
which said rim is adapted to bear, others of said
rollers each being provided with a' peripheral
groove in which said rim is adapted to ride, and
means normally urging said other rollers inwardly
of the plate and against said rim whereby said
35 rim is normally urged into engagement with said
?ange on the ?rst mentioned roller.
8. In an apparatus for stenciling continuous de
signs on the frusto-conical rim portions of saucer-_
article may roll upon each other.
11. In an apparatus for applying arcuate de
signs to saucer-like articles by a stenciling proc
25
ess, a stencil screen having a frusto-conical sur
face provided with a pervious portion represent
ing the design to'be applied to an article, means
for mounting said screen for oscillation about the 30
axis of said frusto-conical portion thereof, means
for mounting an article for rotation about its
axis and in tangential rolling line contact with
said frusto-conical portion of the screen, and.
means disposed within said frusto-conical por 35
tion of the screen for forcing coloring material
through said pervious portion thereof and onto
said article.
like articles, a frusto-conical stencil screen, means
40
for mounting saidscreen in tangential rolling
RAYMOND G. MARTIN.‘
40
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