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Патент USA US2114321

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2,Í14,321
STENCILING APPARATUS
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Filed Aug. 20, 1936
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April 19, 1938.
H. R. SCHUTZ
2,114,321
sTENc1L._ING APPARATUS ,
Filed All@ 20, 1955
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Patented Apr. >19, 1938
2,114,321
UNITED STATES PATENT OFFICE
2,114,321
STENCILING APPARATUS
` Harold R. Schutz, Toledo, Ohio, assignor to Libbey
Glass Company, a corporation of Ohio
Application August 20, 1936, Serial No. 96,993
4 Claims. (Cl. .10b-124)
The present invention relates to stenciling ap
paratus designed for use in applying a vitreous
enamel composition or paint to articles of glass
ware such as tumblers, jars, bottles and the like,
of a portion of the apparatus shown in Fig. 1 and
showing an automatic trip mechanism employed
for elevating the squeegee;
mentary showing made in Fig. 3;
5 and to other articles of a vitreous or ceramic na
ture in the lettering or decorating thereof by a
Fig. 5 is a side elevational view similar to Fig. 4
stenciling process.Y
While the invention may well be employed
showing the various parts thereof in another
where either the screen or squeegee is moved posi
Fig. 6 is a transverse sectional view taken sub
stantially along the line 6-6 of Fig. l; and
"
position;
10 tively’it relates to stenciling apparatus of the
type employing a reciprocable stencil screen ca
pable of movement relative to the article under
going decoration and having permeable portions
through which the decorating material is trans
15 ferred to the article by the spreading action of
a squeegee which is maintained in contact with
the screen along the line of contact between the
screen and surface of the article undergoing deco
ration.
20
'
Fig. 4 is a side elevational view of the frag
In apparatus of this type, it is necessary that,
upon completion of each stenciling operation and
prior to movement of the screen to either of its ex
treme positions, the squeegee be elevated momen
tarily from the screen to clear the enamel com
position thereon in order that a quantity there
of may be passed under the squeegee and occupy
a position on the screen in advance of the squeegee
_immediately prior to return movement of the
screen in the performance of the next succeeding
:
Heretofore in apparatus of this type, this clear
ing operation has been dependent upon the skill
and judgment of the operator who has been
obliged to approximatel the proper moment in
35 each stroke of the reciprocable stencil screen for
elevating the squeegee to clear the enamel com
' position on the screen. When this relatively im
portant clearing operation is left entirely to the
skill of the operator, neither uniformity of de
40 sign nor maximum output can be attained. Ac
cordingly, the principal object of the invention
is to provide an automatic means for momen
tarily elevating the squeegee from the stencil
screen at the completion of each individual _deco-
45 rating >operation but prior to movement of the
stencil screen to either of its extreme positions.
Cther objects and advantages of the invention
-will appear hereinafter.
.
Fig. 7 is an enlarged fragmentary sectional
view, diagrammatic in its representation, taken
transversely through the article undergoing deco
ration,- the stencil screen, and a portion of the
squeegee, showing the manner in which the ele 15
vated squeegee clears the enamel composition on
the stencil screen.
The apparatus involves in its general organiza
tion a base I0 in the form of an elongated, sub
`
30 decorating operation.
'
i
In the accompanying drawings:
Fig. 1 is a top plan view of a stenciling appa
ratus manufactured in accordance with the prin
ciples of the present invention;
Fig. 2 is a side elevational view of the apparatus
shown in Fig. 1;
Fig. 3 is an enlarged fragmentary top plan view
55
stantially rectangular casting provided with a re
9 o.
cess II in the forward side thereof medially of d
its'ends. Bolted or otherwise secured to the base
Il) on opposite sides of the recess II, and extend
ing vertically upward therefrom, are a pair of
standards or supports I2A (Fig. 2) having inte
grally formed aligned bearings I3 medially of
their ends which serve to support therebetween
a horizontal rock-shaft I4 (Fig. 6).
An article supporting assembly I5 (Figs. 2 and
6) is pivotally mounted on the rock-shaft Hand
'is designed to rotatably support thereon a tum
bler T or like ‘article to be decorated. The lower
portion ofthe article supporting assembly I5 ex
tends into the recess Hand the> entire assembly
is adapted by an automatic mechanism, not
shown, and which forms no part of the present
invention, to be swung about the axis of the rock
shaft I4 to a lowered position to facilitate inser
tion of an undecorated article in the apparatus
or the removal of a decorated article therefrom.
A pair of supporting members I6 (Figs. 1 and 2)
each having a forwardly and upwardly extend
`ing supporting `arm I1, and a vertically extend
' ing supporting arm I8, are bolted or otherwise
secured to the base IB at opposite ends thereof. 45
A pair of front and rear, transversely extend
ing, horizontal tracks I9 and 20 respectively, are
carried by the Supporting arms I'I and I8 and
are substantially coextensive with the base I0.
Supported tractionally upon the tracks I9 and 50
20 and movable therealong in either direction
transversely of the apparatus, is a stencil screen
carriage 2l having associated therewith a stencil
screen S adapted to occupy a, position in the ap
paratus in tangential rolling line contact with 55
2
2,114,321
the article T supported in the assembly I5 there
i. e., after the completed design has been applied
beneath. The stencil screen carriage includes
supporting wheels 22 which ride'upon the tracks
to the tumbler T, as the carriage approaches the
end of its stroke at either end of the track I9. the
-|9 and 20 and which are mounted on the parallel
forward end of one or the other of the shafts
23, as the case may be, passes completely over its
side bars 23 of the carriage 2 I.
The upper ends of the standards I2 are pro
10
vided with integral guides 24 (Fig. 1) having ax
ially aligned bores“ 25 which serve to support
therebetween a horizontal rock-shaft 26. A
squeegee arm 21 is rockably mounted on the rock
shaft 2B by means of an integral sleeve 28 formed
on the rear end of the arm 21 and through which
the shaft 26 extends. The squeegee arm 21 ex
tends over the tracks I9 and 20 and the forward
15 end thereof is supported on the front track I9
by means of an adjusting screw 29 which bears
on the track I9 and by means of which a squee
gee S' carried by the arm 21 may be adjusted
to the screen S. The extreme forward end of the
20 arm 21 is turned downwardly as at 21’ in close
proximity to the track I9.
Upon movement of the carriage 2| from the
extreme position shown in Fig. 1 to a correspond
ing position on the opposite side of the appara25 tus, or vice versa, _the squeegee S' which bears
lightly against the screen S along the line of con
tact between the tumbler T and the screen S,
forces coloring material, which is placed on the
screen S, through the screen and onto the tum
30 bler T with which it makes tangential rolling line
contact.
Referring now to Figs. 2, 3, 4, and 5, an auto
matic trip mechanism for momentarily elevating
the squeegee arm 21 and squeegee S’ carried
35 thereby, from the stencil screen S is shown. The
trip mechanism is adapted to function after the
complete design has been applied'ßto the tumbler
T_ but prior to movement of the carriage 2| to
either of its extreme positions. Such momentary
40 ,elevation of thesqueegee S' permits the enamel
composition on the screen to pass under the
squeegee and occupy a position ahead of the
squeegee during the return stroke of the carriage
in order that proper application of the design
45 may be made to the next succeeding tumbler un
dergoing decoration.
Pivoted to the stationary front track I9 in the
vicinity of the squeegee arm 21 and on opposite
sides thereof, are a pair of ñngers 3|l> which nor
50 mally extend upwardly into the path of the car
riage 2| and which are- adapted to be engaged by
the extreme ends of the respective side bars 23
upon approach of the carriage 2| to one or the
other of its extreme positions. Each of the ñn
gers 30 is connected through links 3| to one arm
of a bell crank lever 32. The other arm of the
bell crank lever 32 is conveniently curved for
engagement with the Vunderneath side of the
downwardly turned end 21' of the squeegee
60
lc5
arm 21.-
,
_
It will be seen that inward swinging movement
of either of the fingers 30 toward the squeegee
Varm 21 will transmit motion through the respec
tive links 3| and bell crank levers 32 in such a
manner as to elevate the forward end of the arm
21 to permit the squeegee S' to clear the enamel
composition on the screen S.
Each of the ñn
gers 30 is maintained in -its upwardly projecting
position by means of a coil spring 35 connected
70 at one end to some stationary point on the track
respective finger 30 and in so doing, tilts thev
finger inwardly as shown in Fig. 5 toward the arm
21 to momentarily raise the arm in the manner
justl described.
,
Upon passing beyond the radial limits of the
finger 30, the end ofthe shaft 23 releases the
finger 30 which is immediately returned to its
upright position as shown in Fig. 4, thus permit
ting the squeegee S’ to return by gravity to screen
.engaging position. Upon commencement of the 15
next succeeding decorating operation, as the car
riage 2| is moved in the reverse direction, the end
of the shaft 23 trips lightly over the finger 30
with no signiiicant effect other than to permit
the carriage to continue its unobstructed move 20
ment on the» tracks I9 and 2|).
In Fig. 7, the squeegee S’ is shown in the ele
vated position which it momentarily assumes
upon tripping of the mechanism liust described.
A portion of the enamel composition on the screen
S has passed with the screen underneath the
squeegee and, upon lowering of the squeegee into
contact with the screen, this enamel composition
will occupy a position ahead of the squeegee for
proper application to the tumbler T during the next operative decorating movement of the screen
carriage 2|.
Modiñcatìons and variations may be resorted
to within the spirit and scope of the appended
claims.
I claim:
~
.
1. The combination with a stenciling apparatus
including a horizontally disposed track,-a stencil
screen carriage mounted on said track for vrecip
rocation from one end thereof to the other, a 40
stencil screen on the carriage, means for posi
tioning an article having a curved surface to be
decorated in tangential rolling line contact with
said screen, and a squeegee normally in contact
with said screen for forcing decorating material 45
through the same onto said article, said squeegee
being adapted to be lifted out of contact -with said
screen, of an vautomatic trip mechanism includ
ing a ñnger projecting into the path of movement
of said carriage and adapted to be engaged by if)
said carriage as the same approaches the end of
its stroke in one direction, a lifting ñnger for lift
ing said squeegee, and a link connecting said
ñngers.
2. The combination with a stenciling appara- -i
tus ’including a horizontally disposed track, a
stencil screen carriage mounted on said track
for recipocation from one end thereof to the other,
a stencil screen‘on the carriage, means Afor posi
tioning an article having a curved surface to be 60
decorated in Atangential rolling line contact with
said screen, and a squeegee normally in contact
with said screen for forcing decorating material
through the same onto said article, said squeegee
being adapted to be lifted‘?gut of contact with said 65
screen„of an automatic trip mechanism including
a finger pivoted to said track and projecting into
the path of movement of said carriage, a bell
crank lever pivoted to said track, one arm of said
lever being in the form of a lifting linger adapted
I9 and at the other end to a medial point on one
to engage said squeegee to lift the same out of
contact with said screen, and a link connecting
is insuillcient to raise the squeegee arm 21 from - the other arm of said nell crank lever and said
its supported position on the front track I9.
first mentioned linger.
of the fingers 39. The tension of the springs 35
75
Upon completion of the decorating operation,
3. In a stenciling apparatus, a reciprocable
2,1 14.321
stencil screen movable in its own plane from an tilt the squeegee about said axis,4 and a. link con->
`extreme position on one side'of the apparatus to necting said fingers.
a corresponding extreme position on the other , . 4. In a stenciling apparatus, a horizontally dis
side of the apparatus, means for positioning an posed track, a stencil screen carriage mounted on
article having a curved surface to be decorated said track for reciprocation from one end thereof
in tangential rolling line contact with said screen, to the other, a. stencil screen mounted yon said
a squeegee mounted for tilting movement about carriage, means for positioning an article having
a horizontal axis, said squeegee being normally a curved surface to be decorated in tangential
in contact with said screen and being adapted rolling line contact with said screen,°a squeegee
upon reciprocation of the latter to force coloring normally in contact with said screen for forcing 30
10 material through the screen and onto the article decorating material through the same onto said
undergoing decoration, said squeegee being article, said squeegee being adapted to be lifted
adapted upon tilting movement thereof to move out of contact with said screen, a squeegee lifting
element pivoted to a stationary part of the appa
out of contact with said screen, a ñnger project
ing into the path of movement of said carriage tus adjacent said track and adapted to be moved
15 and adapted to be engaged by said carriage as into lifting engagement with said squeegee, and
the same approaches the end of its stroke in one a finger connected to said element and projecting
direction, a lifting ñnger adapted to engage the into the path of movement of said carriage.
HAROLD R. SCHUTZ.
free end of said squeegee to elevate the same and
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