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Патент USA US2355930

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Aug. 15, 1944.
w. THORNE
2,355,930
STENCIL PRINTING MECHANISM
Filed April 11, 1941
6 Sheets-Sheet l
/-
I
Aug. 15, 1944.
w. THORNE
STENCIL PRINTING MECHANISM
Filed April 11,
m-HWM
2,355,930
Aug. 15, 1944.
2,355,930
w. THORNE
STENCIL PRINT ING MECHANI SM
6 Sheets-Sheet 3
Filed April 11, 1941
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INVENTOR
\N RRD {Maw E
BY
\WM¢W
‘
ATT
RNEYS
Aug. 15, 1944.
2,355,930
w. THORNE
STENCIL PRINTING MECHANISM
Filed April 11, 1941
6 Sheets-Sheet 4
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INVENTOR
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Aug. 15, 1944.
'
w. THORNE
2,355,930
STENCIL PRINTING MECHANISM
Filed April 11, 1941
6 Sheets-Sheet 5
. INVENTOR
_
WARD “H4 5
BY
'
*'E
xAkTToRNEY
i u‘
Aug. 15, 1944.
w. THORNE
2,355,930
STENCIL PRINTING MECHANISM
Filed April 11, 1941
'
6 Sheeis-Sheet 6
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- INVENTOR
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BY
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H "KTFIfORNEYS +
.
Patented Aug. 15, 1,944
I _-2,355,93oi
UNITED STATES PATENT ~ OFFICE
2,355,930
s'rnncn. PRINTING micnam'sm
assignor, by
Ward Theme, Westport, Conn,
to Linen Guild, Inc., New,
mesne
York. N. Y., a corporation of New York
Application April 11, 1941, Serial No. 388,017
18 Claims- , (Cl. 101-123)
on the line 3-4 of Fig. 1 and looking in the
direction of the arrows.
Fig. 4 is an enlarged detail view, showing a part
The present invention relates to stencil print
ing mechanism and embodies, more specifically,
an improved form of stencil printing device
wherein stationarily located material to be print
of the carriage moving mechanism of Fig. 2.
Fig. ,5 is a view in section, taken on the line
5—5 of Fig. 4 and looking in the direction of the -
ed upon is traversed by a printing mechanism
that is advanced periodically and located auto- I
arrows.
matically in successive printing positions. A de
Fig. 6 is an enlarged view in section, taken on
vice of this character is shown and described in
line 6-‘ of Fig. 1 and looking in the direction
the application of Wierk and Montague Serial
the arrows.
No. 319,856 and the present invention embodies 10 of Fig.
'I is a view in section, taken on the line
certain structural and operating improvements
1-1 0! Fig. 4‘ and looking in the direction of the
upon the foregoing mechanism.
.
arrows.
More speci?call‘ , an object of the present in
Fig. 8 is an enlarged view in section, taken on
vention is to provi e an improved driving mecha
15 the line I--8 of Fig. 1 and looking in the direc
nism by means of which the movements of the
tion of the arrows.
4
stencil mechanism may be effected with precision
Fig. 9 is an enlarged view, taken on the line
and alacrity.
v
'
9-8 of Fig. 1 and looking in the direction of the
A further object'of the invention is to provide
an improved device by means of which the mov
able stencil carriage may be located accurately
vin a series of printing positions.
Yet another object of the invention is to provide
an improved stencil operating mechanism by
'
arrows.
Fig. 10 is a view in section, taken on the line
Ill-ll oi Fig, 1 and looking in the direction of
the arrows.
Fig. 11 is a view in section, showing one of the
valves of the ?uid system utilized by the present
means of which the movements of the stencil 26 invention.
with respect to the material to be printed may
Fig. 12 is an enlarged detail view, in section,
be e?ectively controlled.
,
_
showing the cushioning mechanism provided for
A further object of the invention is to. provide
the carriage drive.
,
an improved mounting mechanism for the car
Fig. 13 is a view in section, taken on the line,
riage upon which the carriage is mounted, by 80 |a-|: of Fig. 12 and looking in the direction of,
means of which the carriage may be located
transversely of its direction of movement. ‘
the arrows.
Fig. 14 is a diagrammatic view of the electrical
A further object of the invention is to provide
an improved color applying mechanism by'means
system used by the present invention.
Fig. 15' is a diagrammatic view of the, ?uid
' of which the application of color to the material’
to be printed is accomplished effectively.
The foregoing objects are attained by means 01
system used by the present invention.
Referring to the above drawings and particu
larly to Figs. 1 and 2, it will be observed that an
elongated table I is provided upon which the
?uid driving mechanism for actuating not only
fabric 2, to be_ printed upon, is secured in a suit
the movement of the carriage along the material
t6 be printed but also the raising and lowering 40 able fashion. At opposite sides of the table i,
rails 3 are secured, these rails being formed of
of the stencil frame and the locating mechanism
inverted V-shape ‘as illustrated in Figs. 5 and 'Z,
by means 01' which the carriage is located in suc
in order that a movable carriage 4 may be suit
cessive printing positions. Further structural
ably positioned and accurately located upon the
improvements are embodied that will be described
in greater detail hereinafter and that attain the 45 tablej The rails are formed with ?anges 3' which
objects hereinabove recited, as well as other ob
are suitably secured to the table and are engaged
by rollers 5, mounted upon brackets 6, mounted
jects that will be apparent to those skilled in the
. upon the bottom of the frame of the carriage l.
art upon reading the following specification in
These brackets 6 are located at the four corners
connection with the accompanying drawings,
50 of the frame and the axes of the rollers prefer
wherein:
ably lie parallel to the angular sides of the track
Fig. i is a plan view of a machine constructed
1 as illustratedin Fig. 7. The foregoing mount
in accordance with the present invention.
ing of the carriage upon the rails provides lateral
Fig. 2 is a view‘in side elevation, partly broken
stability for the carriage and insures proper loca
away and in section, showing the device of Fig. 1.
P18. 3 is a'view in longitudinal section, taken
tion upon the table. .
2,856,980
Within the carriage 4 there is provided a stencil
moving the control rod 33 into supplementary
frame 1 which is pivoted at one end upon a pivot
shaft 8 carried upon a. platform. 3 formed upon '
‘ the carriage 4.
Within the stencil frame 1 (Fig. 3) a stencil
box I0 is secured, the stencil box being provided
with a stencil I I of known form by means of which
the selective application of color may be made
upon the fabric 2. The stencil box may be located ,
cylinder 42 (Fig. 12).. Continued movement or
the piston'in the cylinder 34 advances the control
rod 33 into the cylinder 42 to progressively cut
oil’ ports 43 and thus restrict the escape of ?uid
from the left-hand end of the cylinder 34 into the
?tting 33. This provides a. cushioning effect to
absorb the shock of arresting the movement of the .
carriage.
upon channels 12 carried by the frame 1 and color 10
A ?ow of fluid in the reverse direction, that is,
is may be applied through the stencilby means
entering the cylinder 34 through the ?tting 33 of paddles I4 and II in a manner to be described
hereinafter.
I
'
causes a slow return movement of the piston 33
until the cross-head it strikes a collar 31' on the
In order that the carriage 4 may be advanced
along the table to successive printing positions, 15 control rod 33 to move the control rod to the
right as viewed in Fig. '12. This causes the aper
the'carriage is provided with upper and lower
tures 43 vto be opened and ready for the cushion
guide rods i6, secured to the carriage by means
ing operation on the next return of the cross
of front and rear brackets l1 (Figs. 2 and 4).
head.
.
'
Slidable upon the guides I3 is a cross-head l3
The bracket in cooperates with a scale 401 that
.i'ormed with sleeves is to slide on the guides II.
The cross-head I8 is formed with a boss 20 (Fig. 20 is mounted on the carriage and, by means of an
indicator arm 43’, indicates the movement of the
5) that‘is formed with a vertical channel within
carriage during each cycle of operation. The
which a vertically slidable plate- 2| is received.
travel of the carriage can be adjusted by adjust
.The boss 20 is also formed ‘with a horizontal
ing the position of the bracket 40 as well as the
channel 22 within which a plate 23 is slidable,
..
the plate 23 being formed with slots 24, receiving 25 collar 31.
Upon initial movement of the piston 33 to the
pins 25 that are carried by the boss 23, in order
right in the cylinder 34 as viewed in Fig. 2,
that the plate maybe suitably guided. The plate
the pin 21 will beraised bythe slot 23 and the
‘ 23 is also formed with an angular slot 26 receiv
teeth 28 will be disengaged from the chain 30.
ing a pin 21 formed on the plate 2i. In this
fashion, longitudinal movement of the plate 23 30 Continued movement of the piston will advance '
the cross-head it along the guide rods II to the
will cause vertical movement of the plate 2| be
position illustrated in Fig. 4, at which time the
tween the limits afforded by the extremities of slot
26
carriage will be maintained in such position dur
ing the, printing operation'by means of a locking
The plate 2| is formed, at its lower extremity,
‘ pin illustrated in Fig. 9. This locking pin is shown
with one or more teeth 23 that are adapted to
at 44 and is formed with a piston .43 received:
vengage between the rollers 23 carried by links 33
within a cylinder 48. Fluid may be introduced
of a chain that is secured to the table at the side
into the cylinder by means of ?ttings 41 and 43
of one of the tracks 3. Certain of the links 33 are
formed with ?anges 3| in order that the chain 40 in order that the piston 45 may be moved in
opposite directions. The pin 44 is provided with
may be secured effectively in position.
‘
a tooth 49 that is adapted to engage between
The cross-head i3 is moved slidably along the
the adjacent rollers of the chain 30 so that the
guides It by means of~a connecting rod 32 formed
carriage will be locked in the desired position.
with a piston 33 (Fig. 2) received within an
The chain thus serves as a locating mechanism
elongated cylinder 34. Fluid is introduced into
for the carriage.
.
‘
the cylinder 34 through ' )DZ
ction 35 at one end
In. order that the mechanism may be sealed
of the cylinder and connection 33 at the other end
effectively against the escape of fluid from the
thereof. In this fashion, the piston 33 may be
?uid system, the cylinder 46 is provided with a
moved to the right as viewed in Fig. 2, and with
respect to the carriage, at which time the cross 50 sleeve to threadedly engaged therewith, formed
with a chamber 5i within which multiple seals 62
head i3’ is moved on the guides it. In the next may be received.
phase of operation, the piston and crcssqhead are
locked with respect‘to the track and the cylinder
parent. Beneath the seals 52 there is provided a
moves to the right, advancing. the carriage and
guides with respect to the cross-head. Inasmuch 55 plate 53 having a peripheral groove 54 connected
as movement 01' the cross-head II to the left as
viewed in Fig. 4 will ?rst result in the lowering
of the teeth 23 to engage the chain 30, continued
movement to the left will result in'advancing the
entire carriage to the right in the desired fashion.
Movement of the carriage to the right as above
descrbied is limited by means of a collar 31 (Fig.
4) carried upon a control rod 33,. slidably re
ceived in bosses 33 formed upon the cross-head
it. A bracket 43 is adjustably mounted upon the _
guides l3 and secured
position by means of
clamping bolts 4i. Theinbracket
40 slidably re
ceives the control rod 33 and serves'as a limit
against which the collar
31 engages to arrest the
to a discharge fitting 55 that is connected to a
vsump ‘as hereinafter described. A lower seal 53
is provided beneath the plate 53 to prevent the
The operation of the locking pin ‘44 will be de
scribed in greater ‘detail hereinafter in connec~
tion with the cycle of operation of the machine.
In order that the color l3 may be applied ef
fectively‘io the stencil by means of the paddles
i4 and II, the paddles are mounted upon rods II
that are siidably received in sleeves 59 pivoted at
Oil on a frame 6|. Springs 62 normally urge the
70 paddles downwardly against the stencil I i and the
sleeves "are formed with arms 33 that are pro
as viewed in Figs.
vided with set screws 64 adapted to engage against
2 and 4, by the application of ?uid pressure to
stops 3! in order to limit the angular movement
the connection 33, the control rod 33 advances
along the cross-head l3 and strikes the collar 31, 75 oi’ the sleeves 33 about the pivots 34.
As will be apparent from Figs. 3 and 8, move
3
.
I
_
assaoso
‘ ment of the frame 0| to the right will locate the
paddles in the positions shown/in these ?gures
and the paddle I4 will thus apply the color to the
. associated mechanism thus provide a means for
raising the rear end of the stencil box or frame
‘stencil. After the frame 4| reaches the extreme
In order that the various operations herein
above referred to may be accomplished, the pres
ent invention utilizes a ?uid system which, in
the device shown and described herein, consists
of an oil system illustrated diagrammatically in
during predetermined periods in the cycle of op-'
eration of the mechanism.
right-hand position and its movement is reversed
(as will be described in greater detail hereinafter) ,,
the paddles will pivot about the pivot pins '3 and
the right-hand paddle II will apply the ‘color to
the stencil during the movement of the frame ‘I
_
Fig, 15 and including apressure tank or accumu
to the left as viewed in these ?gures. The paddles 10 lator I03 within which a body of oil I04 is re
thus alternately serve to apply the color to the
ceived, a column of air I05 being maintained above
stencil and remain in parallel relationship during
the oil._ The oil I04 is maintained under pres
all such operations.
'
‘
The frame 0| is provided with upper rollers
34 (Fig. 6) and lower rollers 31. Upper rollers
ride on a track 88 while rollers 31 engage the lower
sure by means of a pump I03 driven by an electric
' motor I01 that is preferably reversible and may
be controlled manually so that the tank may be
surface of a track 80. In this fashion. the ver
tical movement of the frame II is limited.
Through rods 10 (Fig, 8) space the frame ele
ments properly and, in order to mount the frame
OI thereon, the ‘through rods are located by means
From the tank I03 a pressure line I08 supplies
the oil under pressure to a plurality of valves
I03, III, III and H2. These valves are all of
similar design and are illustrated in Fig. 11
wherein valve I09 is shown as being formed with
a casing I I3 and a valve rod I I4. The valve rod is
formed with a central bushing H5 and bushings
H8 and H1. Each of the bushings H6 and H1
may be provided with grooves III! to serve as
seals in a manner which will be readily under
emptied as it becomes oil-bound.
of plates H, the frame 6| being iournalled upon
the lower through rod 10 and secured to the side
through rods by‘means of straps 12.
The paddle frame assembly is moved longitu
dinaliy along the guides 63 and 33 by means of an
endless chain 13 that is connected to the opposite
ends of the plates 1I, passing over the sprockets
14 and 15. The lower stretch of the chain 13 is
- received between the ‘guides 83 and 69. as illus
trated in Fig. 6.
_
stood.
_
‘
A reduced portion II! is thus formed between
30 the bushings H5 and IIS and a reduced portion
' I20 between the bushings H5 and H1. The
valve rod I I4 is normally maintained in one posi
Sprockets '15 are mounted upon a drive shaft
tion by means of a spring I2I that is seated upon
15 that is driven by means of a sprocket 11 which
a disc I22 carried by the rod and within a spring
is driven by a chain 13 (Figs. 1 and 3) that is
seat I23 which is formed in the casing I I3. Move
35
driven by a drive sprocket 13 mountedupon a
ment of the valve into the position shown in Fig.
shaft 80. ‘ The shaft is driven by means of a
11 is caused by the energization of an electro
sprocket 0I that is driven by shafts 32 and 0,3
' magnetic coil II as will be described in' greater
which, in turn, are driven by a worm and'worm
detail hereinafter.
wheel. connection 04 that is driven by an elec
Fluid under pressure is introduced into the
40
tric motor 85.
casing II3 by means of a conduit I24 and is
The forward end 01' the stencil frame (the
adapted to be discharged therefrom through
right-hand end as viewed in Figs, 1, 2.and 3) is
either of‘ the conduits I25. Conduits I26 and I21
raised and lowered by means of mechanism shown
(Fig. 15) establish communication between the
in Fig. 10. This mechanism includes a cylinder
interior of the valve casing and cylinder 90
06 that ispivotally carried by the carriage frame 45 through the ?ttings ‘59 and I00.
4 at 01 and is supplied with ?uid ?ttings 33 and
It will thus be seen that when the electromag
39. A piston 50 is slidably mounted within the
netic coil 11 is energized, the valve rod II4 will be
cylinder 06 and is connected to a connecting rod
moved into the position shown in Fig. 11 and
3| that is pivotally connected at 92 to the stencil
?uid under pressure will ?ow from the conduit ‘
frame 1. A seal and return mechanism may be 00 I24 throughthe reduced portion II9 to the con
provided at the upper end of the cylinder as de
duit I26.‘ This will cause the piston 91 to be
scribed in connection with the structure shown
moved. to the left as viewed in Fig. 15 and to
in Fig. 9 and the details need not be expanded
elevate the rear of the stencil box. When the
at this point. It will‘ be apparent that, depend
valve
rod H4 is in its normal position, the ?uid
ing upon the application of ?uid pressure to 65 pressure is introduced through the conduit I21 to
either of the ?ttings 00 and 00, the piston and
cause a movement of the piston 91 in the reverse
stencil frame will be raised or lowered. The
position to lower the rear of the stencil box. In
manner in which this ?uid pressure'is applied
each such instance, the conduit I26 or I21 which
will be described hereinafter.
‘
‘does not receive ?uid under pressure is connected
The rear end‘ of the stencil frame is provided 00
to either of the discharge conduits I25 in a man
with brackets 93 (Figs. 1 and 2), these brackets
ner which will be readily apparent, thus relieving
being journalled upon the shaft 00 that is sup
ported in eccentrics 94, pivoted at 05 upon brackets
00, carried upon the table 9. The eccentrics 04
' are moved about the pivots 95 by means of a piston
91 that'is received within a cylinder 93 provided
with fittings 93 ‘and I00 which receive ?uid in a
manner to be described hereinafter. By control
the appropriate side of the piston 91 from ?uid
pressure.
1
Connections of the above character are pro
vided for each of the valves IIO, III and II2, the
normal positions of the valve stems of these valves
being such that ?uid under pressure normally
is maintained in conduits I20, I30 and I33, while
ling the application of fluid pressure to opposite
conduits I29, I3I and I32 are connected to ex
may
be
70
sides of the piston 91 the eccentrics 94
haust connections I25. A sump I34 is provided
raised and lowered.
to' collect the ?uid discharged from the several
One of the eccentrics 04 is provided with shoul
valves and pump I05 supplies the fluid from such
ders IIII and I02 to actuate respectively limit
sump to the tank I03 by means of a. pipe I35.
switches A and F as will be described in greater
The electrical connections by means of which
detail hereinafter. The eccentric plates 04 and 13
4
a,sss,oso
the fluid system above described may be con
trolled are lllustrated'ln, Fig. 14 wherein a“ rotary
.the conduit ill so that the rear pivot of the
step switch is shown at I” and provided with a
stencilboxislowered.
rotor'lt having three contact arms'r, r1 and)".
These arms are spaced equi-distantly about the
rotor‘and are adapted to make connection with
"
‘
'
As soon as‘ the rear pivot'ofthe stencil box is.’
lowered, the shoulder Ill closes the limit switch
A toenergise the coil Ill and step the arms of
the switch It into the next position.’ In this po
conducting segments s,‘ ‘s1 ands‘. The segments
sition. arm renga'ges contact bto energize relay
s and s1 are connected together by means of ‘a
wire‘ I" and to a source of current by meansvof
a wire Ill.v The‘ segment s’ is connected, to a
coil 1;
r1 engages dead contact 111; and arm
ra engages contact bI to connect the limit switch
28 with
stepping relay Ill and to a suitable source of
‘coil IIO.‘ Energization of relay‘, coil
I causes the valve I II to supply v?uids under pres
current by means of a wire Ill. For purposes of
simplification, the source of current is assumed to
be grounded in order that the circuits hereinafter
described may be} conveniently completed. The
stepping ‘relay I” is provided with a drive
' ‘ ar- ‘
sure through conduit “I to iitting 89,‘ causing
the front end of the stencil box to .be lowered.
When the box is lowered, limit switch B is closed
again energizing the. coil- lil .and stepping the
rangement by means of which the rotor B. may be
switch R to the next position so
‘ that the con- .
advanced periodicallyto successive positions upon
successive energization of the stepping switch.
tacts engage the series of c contacts. 5 Arm 1'
The stepping switch I" is provided with con-' ,
tacts that are connected in such fashion as to
cause the rotor contactcrs r, 1-1, and, rI to advance
throughaeight successive positions upon corre
' thus causes the relay coil I tomaintain the front
end of the stencil box down while arm r1 engages
contact 1:1 to energize the relay coil V- and close
the “circuit of motor it to‘ advance the paddle
frame steadily over the stencil. ‘Arm 1'? engages
' contact 0' thus connecting the limit switch 0 in
circuit with the coil I39‘ and, when the "paddle ‘
,25
The stepping switch is ‘provided with a plu
frame completes its forward motion,. limit switch
sponding contacts before completing one cycle of
operation.‘
“
‘
I
-
rality 01' contacts, twenty-four in all. spaced cir
cumferentially about the switch and arranged in
three groups insofar as their
functions are con- '
0 is closed, again stepping the‘ contacts of switch
B into the at position. In such position, ‘arm, 1'
engages contact if to continue toenergize the re
cemed. ‘The ?rst group'of eight contacts is il
lay coil I: arm 1'1 engages contact (11 to energize
lustrated as contacts a, b, c, d, e, f, a and h.‘ The 30 the relay coil VI to. reverse the direction of rota
, second group of contacts is indicated at a‘, b‘, c‘,
tion of the motor II,- and arm 1-2 engages contact
d2 to connect limit switch D in circuit, with the‘
d‘, e‘, I‘, g1, and k1‘. The third group of contacts
is shown at 'a‘hb’, c’, ‘d’, c’, f‘, 0' and h’. 1
the motor ll; brings
It will be seen that contacts b, c'and d, and con
tacts I, a and )t'are connected together.
‘
‘
Contacts b,‘ c and d are connected to relay coil I
- by means of a wire ‘Ill; contacts 1. tr and h to
relay coil II by means of a wire I42; contactjcX to '
‘ relay coil V by means of a
wire I“; contacts d! to
relay coil VI by means of a wire I“; and con
tacts c1 and h1 to relay coils III and IV by means
of wires Ill and Ill, respectively.
‘
‘
‘ the coil “Ito step
the arms of the switch R into
‘
thee position. Since contact e is dead, the front
end of the stencil box is elevated by reason of
the normal position of the valve III. Contact e1,
is also dead and contact e’ connects limit switch
' E with the 0011 I".
‘ When the front end'ofv the
stencil box is elevated. the limit switch E is closed.
again stepping the switch Rinto the I position
Contacts a‘, b’, c’, d’, e", 1', a3, and h2 ‘are con
nected to the respective limit switches A) B, C.‘
wherein‘ arm r engages contact I to energize the
D, E, F, G, and H by means of wires I41, I“, I“, 45 relay ‘coil 11; contact r1 engages dead contact]!I .,
"0,. III, III, I" and III. The relay coils V
and contact r’ engages- contact P to connect the ‘
limit, switch l'I to the; relay coil III. ~Relay coil and VI control a reversing switch R.S. to control '
II and valve Ill cause fluid under pressure to be
the direction of operation of the reversible motor
directed to the cylinder II .to cause the pivot con
85 that operates the paddle frame, previously de
nection ‘of the box to be elevated to close the
scribed. I The motor I! is provided with the usual
shunt held winding II‘ and series ?eld winding
limit switch F and step the switch R around to
the 0 Position.
II’. The detailed connections by means of which
In the a position, the arm 1' engages contact a
the connections ‘for the motor 85 and the afore
said ?eld windings may be connected to a source
to
maintain the relay coil II energized; the arm rl
55
of current indicated at I!‘ are illustrated in Fig.
14 and need not be described in detail inasmuch
as they are‘ conventional connections for‘circuit's
oi thischaracter.
'
‘ '
‘
The operation of the mechanism is as follows:
With the‘rotary switch R. in the position illus
trated in Fig. ‘14, switch arm 1' connects limit
switch H to the stepping coil I” while the car
engages contact a1 to energize relay coil IIIrand
arm 1" engages contact a’ to connect the limit
switch G to the coil III. In this position, the a
rear' pivot of the stencil box'gis maintained ele
vated by the continued energization ofthe coil .
II and the coil III causes the locating pin “to
be raised. ‘When the pin is is raised the limit‘
switch (3 is closed
to advance the switch R to the '
riage and stencil mechanism is advancing along
It position. In this position. the contact rcon
the table toward the next printing position. 65 tinues to maintain the coil II energized; them
When it reaches such position. the limit switch
1'1 engages contact h! to energize the relay coil
H is closed, energizing the coil I 39 and stepping
IV, as well as the elongated contact a1 to continue
the switch arms to the next position at which
time arm r is on dead contact 0, arm r1 on ‘dead
. contact a1 and arm r' on contact a‘, so that the
to energize coil III; and the‘ arm r2 engages the ‘
contact 'h' to connect the limit switch H tothe '
coil Ill. In such position,‘ the relay coil ‘IV
. 70, causes the valve III to be actuated to introduce
limit switch A is connected to the coil I".
the relay coil III is de-energized, the locating pin " ?uid under pressure into the cylinder 34 andthus
ll is lowered to its normal position by the ilow
?ance the carriage toward the next printing
on.
of oil through conduit Ill. Moreover. relay coil
It
will
be observed
II is deenerslzed to cause oil to be supplied to 76 reached the
desired that, after the carriage has "
printing. position. vand the
2,355,080
limit switch H closed, the contact arm r1 moves“;
‘of! of the contact h.1 and the coil or relay IV is
de-energized. This permits the valve Ill to‘move
to its normal position and to supply fluid under "
pressure to the left-hand end of the cylinder 34
to advance the cross-head ii to the right in order
that it will be ready for the next operation.
‘
It will thus be apparent that the invention pro
vides a completely automatic mechanism for ad
vancing the stencil along the material to be
printed, locating the stencil, applying. the ink,
raising the stencil and advancing it to the next
5
along said surface, stencil printing means on said
carriage, an assembly comprising‘a piston ele
ment and a cylinder element, means to connect
one element of the assembly ?xedly to the car
riage, a guide on the carriage, means to mount
the other assembly element slidably on the guide,
> a vertically slidable member on the guide to en
' gage the supporting surface, and means to ac
tuate the vertically slidable member by the said
other assembly element.
'1. Stencil printing mechanism comprising a_
work supporting surface, a carriage movable
along said surface, stencil printing means on said
carriage, an assembly comprising a piston ele
While the invention has been described with
and a cylinder element, means to connect
speci?c reference to the structure described in 15 ment
one
element
of the assembly ?xedly to the car
the attached drawings, it is not to be limited,
riage, a guide on the carriage, means to mount
save as de?ned in the appended claims.
the other assembly element slidably on the guide,
I claim:
.
a crosshead slidable on the guide. a member slid
1. Stencil printing mechanism comprising a
able vertically in the crosshead to move into and v
20
work supporting surface, a carriage movable
out of engagement with the supporting surface,
along said surface, stencil printing means on said
and a connection between the vertically slidable
carriage, an assembly comprising a piston ele
memberv and the said other assembly element!
ment and a cylinder element, means to connect
whereby initial‘ movement of the said other as
position. '
the assembly to the carriage, means on the as
sembly to engage the supporting surface, and
sembly element with respect to the guide effects
movement of the vertically slidable element with
respect to the crosshead and continued move
the cylinder to move the carriage with respect to
ment of the said other assembly element 'moves
the supporting surface.
the crosshead with respect to the guide.
2.-- Stencil printing mechanism- comprising a
8. Stencil printing mechanism comprising a I
work supporting surface, -a carriage movable 30 work supporting surface, a carriage movable
along said surface, stencil printing means on said
along said surface, stencil printing means on
carriage. an assembly comprising a piston ele
said carriage. a chain secured to the supporting
ment and a cylinder element, means to connect
surface, means on the carriage for engaging links
the assembly to the carriage, means on the as
of the chain, and means to move the engaging
sembly to engage the supporting surface, and 35 means
with respect to the carriage whereby said
means tointroduce a fluid under pressure into
means to introduce a ‘fluid under pressure into
chain serves as a means for locating the car
one end of the cylinder to move the carriage with
riage in desired position.
respect to the supporting surface and into the
9. Stencil printing mechanism comprising ‘a
other end of the cylinder to move the said engag
ing means with respect to the supporting surface. 40 work supporting surface, a carriage movable
along said surface, stencil printing means on said
3. Stencil printing mechanism comprising a
carriage, a circular pitch chain secured to the
work supporting surface, a carriage movable
supporting surface, means on the carriage for
along said surface, stencil printing means on said
engaging links of the chain, and means to move
carriage, an assembly comprising a piston ele
the engaging means with respect to the carriage
ment and a cylinder element, means to connect 45 whereby said chain serves as a means for locking
the assembly to the carriage, means on the as
the carriage in desired position.
sembly to engage the supporting surface, means
10. Stencil‘ printing mechanism comprising a
to lock the carriage with respect to the support
work supporting surface, a stencil frame adapted
ing surface, and means to introduce a ?uid under
to support a stencil, means to mount the frame
pressure into one end of the cylinder to move the 50
carriage with respect to the supporting surface » on the supporting surface, a squeegee frame
mounted on the stencil frame for movement back
and into the other end-of the cylinder to move
and forth across the stencil, squeegee elements,
the said engaging means with respect to the sup
spaced ?xed pivot means to mount said elements
porting surface while the lock means locks the
the frame, and means to mount the elements
carriage with respect to the supporting surface. 65 on
on the ?rst means with capacity for yielding
4. Stencil printing mechanism'comprising a
movement with respect thereto.
work supporting surface, a carriage movable
11. Stencil printingmechanism comprising a
valong said surface, stencil printing means on said
work supporting ‘surface, a stencil frame adapted
carriage, a cylinder on the carriage, a piston and
connecting rod in the cylinder, ?uid connections 60 to support a stencil, meansL to mount the frame
on the supporting surface. a squeegee} frame
on the cylinder tomove the piston in opposite di
mounted on the stencil frame for movement back
rections, and means on the connecting rod to en
and forth across the stencil, squeegee elements,
gage the supporting surface.
5. Stencil printing. ' mechanism comprising a
work supporting surface, a carriage movable
along said surface, stencil printing means on said
carriage, anassembly comprising a piston ele
spaced ?xed pivot mountings for said elements
on said squeegee frame and means for mount
ing said elements on said pivot mountings yield
-ably with capacity for independent operating
movement.
ment and a cylinder element, means to connect
12. Stencil printing mechanism comprising a
one element of the assembly ?xedly to the car
r’iage, a guide on the carriage, means to mount 70 work supporting surface, a stencil frame adapted
to support a stencil, means to mount the frame
the other assembly element slidably on the guide,
on the supporting surface, a squeegee frame
and means carried by the guide to engage the
mounted on the stencil frame for movement back
supporting surface.
and forth across the stencil, squeegee elements,
6. Stencil printing mechanism comprising a
spaced
?xed pivot mountings for said elements
76
work supporting surface, a carriage movable
6
2,856,980
supporting-surface, a supplementary cylinder on
on said squeegee frame, means for mounting said
elements on said pivot mountings with capacity
for independent operating movement, and means
to limit pivotal movement of said squeegee ‘ele
ments in at least one direction.‘
,
13. Stencil printing mechanism comprising a
work supporting surface, a stencil frame adapted
vto support a‘ stencil, means to mount the frame
on the supporting surface, a squeegee frame
, the. cylinder element
having a plurality of ports
communicating with the cylinder element and a
port communicating with a ‘?uid system, a con
5 ,
trol, rod in the supplementary cylinder, and
means to actuate the control rod by an element
H
mechanismcomprising a
work supporting surface. a ‘carriage movable
along said surface, stencil printing means mov
and forth, across the stencil, squeegee'elements,
able on
carriage, separate ?uid operated
spaced ?xed pivot mountings for'said elements
means ‘to move the carriage and the stencil,‘ a
on said squeegee frame, means for mounting said
source of ?uid under pressure, valve mechanism
element on ‘said pivot mountings withcapacity
for independent'operating movement, means ;to 15 to controlthe ?ow of ?uid from‘ the source to the
separate means, and selective mechanism to ac
limit pivotal movement of said squeegee elements _,
mounted on the stencil frame for movement back
tuate the valve mechanism. ‘
in at least one direction, and means to urge the
squeegee elements toward the stencil.
, a
,
work supporting surface, a carriage movable
' 14. Stencil printing mechanism comprising a
supporting surface, a carriage movable.
along said surface. stencil printing means on said
carriage, an assembly comprising a piston ,ele
ment and a cylinder element, means to connect
the assembly to the carriage, means on the as
sembly to engage the supporting surface, means
to introduce a ?uid underlpressure into the cyl
inder to move the carriage with respect to the
supporting surface, and means to restrict gradu
ally the ?ow of said ?uid at one end of movement
’ work
of
the
carriage.
.
v
v
‘
_
i
-
1'1. Stencil printing mechanism ‘comprising a
i
’ 15. Stencil printing mechanism comprising-a
along said surface, stencil printing means‘mov
,able ‘ on the
carriage, separate ?uid operated
means to move the‘carriage and the stencil, a
source of ?uid under pressure, valve mechanism
to control the ?ow of ?uid from the source to
the separate means, and selective‘ mechanism
controlled by movements of ‘the carriage and
frame to actuate the valve'mechanism.
l8. Stencil printing mechanism comprising a
work supporting surface, a carriage movable
along ‘said surface, stencil printing means mov
able on the carriage," parate ?uid operated
means to move the carriage and the stencil, a ‘
work supporting surface, a carriage movable
along said surface, stencil printing means on said
carriage, an assembly comprising a piston ele
ment and a cylinder element, means to connect
the assembly to the carriage, means on the as-.
sembly to engage the supporting surface, means
to introduce a ?uid under pressure into the cyls
lnder to‘move the carriage with respect, to’ the
sourceof ?uid‘under pressure, valve mechanism
to .control the ?ow of ?uid from the source to
the separate means, electromagnetic mechanism
to actuate the-valve mechanism, and means op
erated by the printing means to control-the elec
tromagnetic mechanism.
,
i
,
-
.
.-
‘
1
.‘WARD‘THOBNE.
‘CERTIFICATE or coRRsci-Iou.
a
Patent No. 2.555.959,
»
.~
~
,
‘
‘
August: 15," ‘19141,.
,.
WARD
THORNE.
It is hereby certified that error ‘appears in the printed ‘specification
of‘ the above numbered‘ patent requiring correction ‘as follows: .Page 5, sec
ond column, line lié, claim 9, forthe word "locking" read “locating-e;
page 6, first column, 'line'lh', claim 13, for "element" read "elements";
and that the said Letters Patent should be‘read with this ‘correction there
in' that ‘the same may conform to the‘ record or the case :in the Patent 01'
i‘ice.
'
'
'
Y‘.
‘
~
.
-
‘Q
- Signed and sealed this 26th day of’ September, A. D. 191-114.
Leslie ‘Frazer
(Seal)
Acting Commissioner of Patents.
6
2,856,980
supportingsurface, a supplementary cylinder on
on said squeegee frame, means for mounting said
elements on said pivot mountings with capacity
for independent operating movement, and means
to limit pivotal movement of said squeegee ‘ele
ments in at least one direction.‘
,
13. Stencil printing mechanism comprising a
work supporting surface, a stencil frame adapted
vto support a‘ stencil, means to mount the frame
on the supporting surface, a squeegee frame
, the. cylinder element
having a plurality of ports
communicating with the cylinder element and a
port communicating with
a ‘?uid system, a con
,trol, rod in the supplementary cylinder, and
means to actuate the control rod by an element
H
mechanismcomprising a
work supporting surface. a ‘carriage movable
along said surface, stencil printing means mov
and forth, across the stencil, squeegee'elements,
able on
carriage, separate ?uid operated
spaced ?xed pivot mountings for'said elements
means ‘to move the carriage and the stencil,‘ a
on said squeegee frame, means for mounting said
source of ?uid under pressure, valve mechanism
element on ‘said pivot mountings withcapacity
for independent'operating movement, means ;to 15 to controlthe ?ow of ?uid from‘ the source to the
separate means, and selective mechanism to ac
limit pivotal movement of said squeegee elements _,
mounted on the stencil frame for movement back
tuate the valve mechanism. ‘
in at least one direction, and means to urge the
squeegee elements toward the stencil.
, a
,
work supporting surface, a carriage movable
' 14. Stencil printing mechanism comprising a
supporting surface, a carriage movable.
along said surface. stencil printing means on said
carriage, an assembly comprising a piston ,ele
ment and a cylinder element, means to connect
the assembly to the carriage, means on the as
sembly to engage the supporting surface, means
to introduce a ?uid underlpressure into ‘the cyl
inder to move the carriage with respect to the
supporting surface, and means to restrict gradu
ally the ?ow of said ?uid at one end of movement
’ work
of
the
carriage.
.
v
v
n
_
i
-
1'1. Stencil printing mechanism ‘comprising a
i
’ 15. Stencil printing mechanism comprising-a
along said surface, stencil printing means‘mov
,able ‘ on the
carriage, separate ?uid operated
means to move the‘carriage and the stencil, a
source of ?uid under pressure, valve mechanism
to control the ?ow of ?uid from the source to
the separate means, and selective‘ mechanism
controlled by movements of ‘the carriage and
frame to actuate the valve'mechanism.
18. Stencil printing mechanism comprising a
work supporting surface, a carriage movable
along ‘said surface, stencil printing means mov
able on the carriage," parate ?uid operated
means to move the carriage and the stencil, a ‘
work supporting surface, a carriage movable
along said surface, stencil printing means on said
carriage, an assembly comprising a piston ele
ment and a cylinder element, means to connect
the assembly to the carriage, means on the as-.
sembly to engage the supporting surface, means
to introduce a ?uid under pressure into the cyls
inder to‘move the carriage with respect, to’ the
sourceof ?uid‘under pressure, valve mechanism
to .control the ?ow of ?uid from the source to
the separate means, electromagnetic mechanism
to actuate the-valve mechanism, and means op
erated by the printing means to control-the elec
tromagnetic mechanism.
i
i
i
-
.
=
a
‘
‘
v
WARD ‘THOBNE.
‘CERTIFICATE or coRRsci-Ior.
‘ Patent No. 2,355,939.
>
..
>.
,
i
‘
'
WARD
_
‘
.
-
I
August1l5," 19141,.
moans.
It is hereby certified that error ‘appears in the printed ‘specification
of‘ the above numbered‘ patent requiring correction as follows: .Page 5, sec
ond column, line lié, claim 9, forthe word "locking" read “locating-e;
page 6, first column, 'line'lli', claim 13, for "element" read "elements";
and that the said Letters Patent should be‘read with this ‘correction there
in' that ‘the same may conform to the‘ record or the case :in the Patent 01'
i‘ice.
'
'
'
Y‘.
‘
~
.
-
‘Q
- Signed and sealed this 26th day of’ September, A. D. 19%.
Leslie ‘Frazer
(Seal)
Acting Commissioner of Patents.
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