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Патент USA US3068796

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Dec. 18, 1962
H. P. KEIL
3,068,786
SHEET MOISTENING MEANS FOR DUPLICATING MACHINES?
Filed Jan. 18, 1960
9 Sheets-Sheet 1
INVENTOR.
H6727 ' 1'3. Kai!
any.
Dec. 18, 1962
H. P. KElL
3,068,786
SHEET MOISTENING MEANS FOR DUPLICATING MACHINES
Filed Jan. 18, 1960
9 Sheets-Sheet 2
25'
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INVENTOR.
BY Hang R Kez'l
(21-1,. -
Dec. 18, 1962
H, P. KElL
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3,068,786
SHEET MOISTENING MEANS FOR DUPLICATING MACHINES
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INVENTOR.
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Dec. 18, 1962
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SHEET MOISTENING MEANS FOR DUPLICATING MACHINES
Filed Jan. 18, 1960
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H. P. KEIL
3,068,786
SHEET MOISTENING MEANS FOR DUPLICATING MACHINES
Filed Jan. 18, 1960
9 Sheets-Sheet 5
339.5
INVENTOR.
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Dec. 18, 1962
3,068,786
H. P. KEIL
SHEET MOISTENING MEANS FOR DUPLICATING MACHINES
Filed Jan. 18, 1960
9 Sheets-Sheet 6
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' INVENTOR.
BY??
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Dec. 18, 1962
H. P. KEIL
3,068,786
SHEET MOISTENING MEANS FOR DUPLICATING MACHINES
Filed Jan. 18, 196.0
9 Sheets-Sheet 7
INVENTOR.
BY Henzy P Kai!
MM
my.
Dec. 18, 1962
H. P. KElL
3,068,786
SHEET MOISTENING MEANS FOR DUPLICATING MACHINES
Filed Jan. 18, 1960
9 Sheets-Sheet 8
INVENTOR.
Henry R Kei/
BYMJ/ZZJ
Dec. 18, 1962
H. P. KEIL
3,068,786
SHEET MOISTENING MEANS FOR DUPLICATING MACHINES
Filed Jan. 18, 1960
9 Sheets-Sheet 9
_INVENTOR.
BYHenZy ,0. K61?!
MM
my.
Uited States atent O?lice
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SHEET MOISTENING MEANS FUR EUPIJICATEYG
MAEHINES
Henry F. Keil, Chicago, Ill., assignor to Fixture Hardware
Corporation, (Ihicago, IiL, a corporation of Illinois
Filed Jan. 18, 196i), Ser. No. 3,112
5 Claims. (Cl. 161-1325)
Patented Dec. 18, 1962
2
FIGURE 8 is a fragmentary sectional view taken along
line 8?8 in FIGURE 6;
FIGURE 9 is a fragmentary sectional view taken along
line 9?9 in FIGURE 6 with a portion of the wick broken
away;
FIGURE 10 is a perspective view of the wick assembly,
with portions broken away to better show its construction;
FIGURE 11 is an enlarged fragmentary sectional view
taken substantially along line 11-11 in FIGURE 5 show
This invention relates to a novel moistening apparatus
10 ing the wick assembly in its relaxed position;
for a duplicating machine.
FIGURE 12 is a view similar to FIGURE 11 showing
The invention is particularly adapted for use in liquid
the wick assembly in its compressed position;
process duplicating machines wherein copy sheets are
FIGURE 13 is a fragmentary top view of the moistening
moistened on one face with a solvent liquid and then
area of the same machine with a roller moistening assem
pressed against a master sheet which has the material
to be copied printed thereon in reverse with hectographic 15 bly substituted in place of the wick assembly;
FIGURE 14 is a fragmentary sectional view taken along
ink. In machines of this type it is customary to mount
line 1ⅶ?l4 in FIGURE 13 showing the roller moistening
the master sheet on the drum by means of a suitable grip
assembly in its relaxed position;
ping device and to press the copy sheet against the master
sheet on the drum by means of a small resilient pressure
roller. The copy sheets are fed between two adjacent
rollers which are pressed together and are intermittently
FIGURE 15 is a fragmentary sectional view similar
to FIGURE 14 showing the roller moistening assembly
in its compressed position; and
FIGURE 16 is a fragmentary sectional view taken sub
rotated from the drum. One of these rollers is moistened
stantially along line i6?l6 in FIGURE 13 showing the
with the solvent liquid. In the present invention the moist
ening of the roller may be accomplished by either wick 25 roller moistening assembly in its compressed position.
In order to fully grasp the nature of this invention, as
or roller moistening assemblies which transfer moisture
complete understanding of the duplicating machine must
from a trough whose liquid level is maintained by an
be obtained. This is established in the following descrip
automatic liquid source on the machine.
tion by a referral to the pertinent parts of a liquid process
It is an object of this invention to provide an efficient
moistening apparatus which is adapted to interchangeably 30 type duplicating machine as they affect the moistening of
the copy sheets. The overall machine is shown in FIG
utilize wick or roller moistening assemblies, dependent
URES 1-6. These ?gures plus FIGURES 7-12 show the
upon the choice of the operator and the type of printing
use of a novel wick moistening assembly. FIGURES
to be done.
13-16 show the adaptation of a roller moistening assembly
It is another object of the invention to provide a novel
wick mechanism wherein the pressure of the wick upon 35 to this same duplicating machine.
Referring now to the drawings, and to FIGURES 1-5
the moistening roller is positively controlled independent
in particular, I have shown my invention as embodied in
of the rotation of the roller. The pressure of the wick
a duplicating machine comprising a pair of spaced apart
is also variable by known mechanisms not previously
side frames ill and 2.1 tied together by a plurality of cross
applied to wick-type moistening agents.
It is another object of the invention to feed the wick 40 rods 22, 23, 25, and 26. The master sheet drum shaft
27 is journalled between the side frames 2il-21, and car
by direct insertion of one end into the trough or fountain
and to control the amount of liquid transferred to the
copy sheet by the moistening roller by means of an inter
ries thereon a master sheet drum 28. A copy sheet feed
tray ?29 is supported between the side frames 2% and 21
at one end of the machine, and the copy sheet receiving
mediate wiper wick. This wick serves to establish a con
tray
3%} is supported between the side frames 20 and 21
HA
Ct
stant degree of moistening on the moistening roller. It
at the other end of the machine. A copy sheet feeder,
also obviates any necessity for priming the machine to wet
generally indicated at 31 in the drawings, is provided above
the transfer wick.
the feed tray 29 to feed copy sheets one at a time into
These and further objects will present themselves from
printing engagement with the drum 2%. As illustrated
a study of the following description and the accompanying
50 best in FIGURE 2, the copy sheets, shown at 32, are
drawings which show the invention utilizing both wick
ed along an inclined ramp 29a of the feed tray 29, and
and roller type moistening assemblies. This description
into engagement with a pair of rollers 33 and 34-. The
is exemplary of the invention, but is not intended to limit
roller 33 is a feed roller, and the roller 34 is a counter
the scope of the invention, which is de?ned in the claims
feed and moistening roller. The roller 33 is driven, by
which follow it.
55 means hereinafter described, to advance the sheet 32 to
In the drawings:
the drum 28. A platen roller 35 is provided beneath the
' FIGURE 1 is a fragmentary top plan view of a machine
drum 28 and is engaged therewith. The copy sheets 32 are
embodying my invention;
fed by the roller 33 and the moistening roller 34 into
FIGURE 2 is a fragmentary sectional view taken along
the bight between the platen roller 35 and the drum 28.
line 2 2 in FIGURE 1;
The drum 2%, of course, has a master sheet wrapped there
FIGURE 3 is a fragmentary sectional View taken along
around and secured thereto by a master sheet clamp 28a
line 3?3 in FIGURE 1;
on the drum, and the copy sheet 32 is pressed into intimate
FIGURE 4 is a fragmentary sectional view taken along
contact with the master sheet as it is advanced between
line 4-?4. in FIGURE 1 with the front side plate and the
the drum 28 and the platen roller 35. The copy sheet
side guides left off;
32 is propelled from the drum 28 into the receiving tray
FIGURE 5 is a fragmentary sectional view taken along
30 after having left the drum 28 and having received
line 5-5 in FIGURE 2 with the cover in raised position;
indicia thereon from the master sheet.
FIGURE 6 is a fragmentary sectional view taken sub
As illustrated in the drawings, the feed roller 33 and
stantially along line 6--6 in FIGURE 5 with portions of
the platen roller 35 are carried between spaced apart lever
the wick assembly broken away;
arms 36 which are pivoted to the side frames 20 and 21
FIGURE 7 is a fragmentary sectional view taken along
by stub shafts 37. The lever arms 36 are pivotable about
line 7-7 in FIGURE 6;
3
3,068,786
the stub shafts 37 so that the feed roller 33 and the platen
roller 35 may be raised and lowered into and out of
engagement with the moistening roller 34 and the drum
28 respectively. The mechanism for raising and lowering
the feed roller 33 and the platen roller 35 is old and well
known, and is described in detail in my prior Patent No.
2,856,847, issued October 21, 1958. Basically the raising
a
drum 28. This control mechanism 59 includes means to ?
change the timing of the rotation of the feed roller 33
with respect to the rotation of the drum 28 when desired,
to control placement of the indicia on the copy sheets
with respect to their leading edges and thus adjust the
margin on the copy sheets. The mechanism 59 is not
described in detail herein for it is identical to that dis~
and lowering mechanism for the lever arms 36 comprises
closed in detail in my prior Patent No. 2,813,483 issued
stop members 38 on the arms 36 which engage trip levers
on November 19, 1957, for Margin Control Mechanism
39 ?xed to a shaft 49 which extends between the side 10 for Duplicating Machines.
,
frames 29 and 21. By rotating the shaft lit} to move the
Duplicating machines of the character described herein
trip levers 39 from the position shown in FIGURE 2 up
depend upon a liquid of a well known type to cause a .
wardly, they may be disengaged from the stops 38 to
transfer of the indicia on the master sheet to the copy
permit the lever arms 36 to pivot downwardly and lower
sheet. The faces of the copy sheets to be imprinted are
the feed roller 33 and platen roller 35. The mechanism 15 coated with the liquid before they are brought into en
for rotating the shaft 41} comprises an operating handle
gagement with master sheet. In the duplicating machine
described herein, the liquid is spread upon one face of
each copy sheet 32 by means of the moistening roller
34. As illustrated in the drawings, the moistening roller
34 is supplied with liquid from a fountain 60 supported
between the side frames 29 and 21. The manner in which
shaft 43 to pivot the trip levers 35'?. The trip levers 39
liquid is supplied from fountain 6h constitutes the sub
are held in either their horizontal position, or their up
stance of this invention and is shown in detail in FIG
wardly pivoted position ?by an over center block mecha
URES 6-12 inclusive. The fountain 60' comprises a
nism generally indicated at 45 in the drawings.
?Driving power for the duplicating machine is supplied 25 generally rectangular frame 120. A shield 121 separates
the frame 12% from drum 28 to prevent splashing on the
from a motor 46 supported beneath the feed tray 29.
41 journalled on the tie rod 26 which is connected by a
lever 42, a link 43, andla lever 4.11, to the shaft 40 in such
a way that movement of the control handle 41 is trans
mitted through the levers 42 and 44 and the link 43 to the 20
Motor 46 drives a worm 48 which is journalled in bracket
member 49 supported between the side frames 20, 21 on
?the tie rods 22 and 23. A drive gear 51} is mounted
above the worm 48 in driving engagement therewith and
is ?xed on a shaft 51 journalled between side frame 29
and bracket member 49. Shaft 51 drives a clutch 47
which is controlled by a lever 47a and a solenoid 47b to
master sheet.
The frame 120 is divided into two com
partments by a vertical wall 122 which slopes toward
the front of the machine to form the bottom 123 of
fountain 69. A ledge 124 protrudes rearwardly from the
bottom of vertical wall 122. The frame 120 is supported
by brackets 125 which are mounted on rod 24 adjacent
to walls 21; and 21 and is also connected to shield 121.
The end of fountain 6% adjacent to wall 21) has formed
provide intermittent operation of the machine. Clutch
47 drives a pulley 52 which in turn drives a belt 53. Belt 35 therein a liquid well 80 through which liquid is fed from
a container 71 in the same manner as previously dis
53 is trained around a pulley 54 that is ?xed to one end
closed in my prior Patent No. 2,856,847, referred to
of the platen roller 35 between the side frame 20 and
above. Each end of fountain 60 has a forward vertical
the adjacent lever arm 36. Driving power is transmitted
groove 123 and a rear vertical groove 13% in which the
through the clutch 47 from motor 46 and thereby to the
moistening apparatus is mounted.
pulley 52, belt 53 and pulley 54- to rotate the platen
The wick moistening apparatus comprises three units,
roller 35. The platen roller 35 drives drum 28 by fric
the moistening roller 34, a wick assembly 131 and a
tional engagement.
backing plate 132. The moistening roller 34 is rotatably
It is to be noted that a more complete description of
supported by two elongated bars 156 which are slidably
the driving and operational controls is not deemed neces
seated in the grooves 13% of fountain 60. Roller 34
sary, since they do not directly affect the operation of the
usually rests on the ledge 124-. Roller 34 is mounted
moistening means which is the? subject of this invention.
directly above the operating position of feed roller 33.
Various drive systems, mechanical or electrical, may be
It is formed of resilient uniform material (such as rubber.
used with this means, and may either drive drum 28
The wick assembly consists of a metal wick locater
directly or indirectly, as may be desired.
As hereinbefore described, the copy sheets 32 are ad 50 plate 133 made of non-corrosive metal. Plate 133 has
a top surface 134 which has two projections 135 bent
vanced into the bight between the platen roller 35 and
downwardly in square form to provide guides which are
the drum 28 by the feed roller 33. The feed roller 33
slidably engaged in the forward vertical grooves 128 of
is driven intermittently during each revolution of the
fountain 60. A forward wall 136 which is bent down
drum 28. The means for driving the feed roller 33 are
wardly from surface 134 supports a wick container 137
shown in dashed lines in FIGURE 3 of the drawings. As
at either end. The wick container 137 is shown sus
illustrated in FIGURE 3, the platen roller 35 and the
which has a lower pocket 138 formed on it and is closed
feed roller 33 have knurled wheels 5d and 55 ?xed at
pended from two pins 140, but may also be formed
their ends between the side frame 21 and the adjacent
integrally with plate 133 if desired. The upper surface
lever arm 36. VA rubber idler roller 57 is positioned
between the knurled wheels 55 and 56, and is journalled 60 134 of plate 133 has attached to it two vertical handles
141 which are used in lifting the wick apparatus into and
on a frame 58 which is pivoted to the stub shaft 37 of
out of the machine.
the lever arm 35. The frame 58 is movable up and
Mounted across the top surface 134 of plate 133 are
down to move the idler roller 57 into and out of en
three wick locator pins 142 which have cylindrical shanks
gagement with the knurled wheels 55 and 56. When
the ?framework 53 is pivoted upwardly to bring the roller
of a height equal to the thickness of the transfer, wick
143 and an enlarged top portion. The transfer wick
57 into engagement with the wheels 55 and 56, power
143 is formed from a rectangular section of absorbent
is transmitted from the wheel 55 on the platen roller 35
material, such as Dacron felt, which has low friction
through the idler roller 57 and to the knurled wheel 56
characteristics and a high capacity for transferring liquid.
to drive the feed roller 33. The driving control mech
The wick 143 extends at one end rearward of plate 133
anism, indicated generally by the numeral 52 is provided
and rests on surface 134 secured by pins 142 which
at the end of the drum 28 adjacent the side frame 21
extend through three holes cut in wick 143 having a
and is operable to raise and lower the frame 58 to move
diameter equal to that of the pin shanks. The remain
the-idler roller 57 into and out of engagement with the
ing end of wick 143 is bent over the wick container 137
knurled wheels 55 and 56 during each revolution of the 75 and ?ts into the pocket 138. The bottom of pocket 138
3,068,788
5
6
thereby to wick 143 to urge the wick into engagement
along its width with the moistening roller 34.
In order for the transfer wick 14-3 to supply moisture
has two apertures 344 cut through it and opening into
pocket 138. These are quite small holes, of the order
of 5/54 inch. The wick is formed with two notches 14S
to the roller 34 in the proper amounts, a certain amount
cut into its end in pocket 138 directly above apertures
of downward pressure must be exerted upon the backing
144. These notches allow a pool to form in pocket 138
plate 132. This pressure is supplied by means of pres
directly above each aperture 144. In assembly, pocket
sure arms 63 which are pivoted on pins 64 secured to the
138 rests in the liquid in fountain 68. Only liquid
fountain
60 as best shown in FIGURE 3. The pressure
which has passed through apertures 144 is carried by
arm 63 have portions 6311 which overlie the stepped ledges
wick 143 by capillary action. Apertures 144 therefore
163 on plate 132. Plate 132 when it is pressed down
limit the rate of flow of liquid in wick 143. Notches 145 10
by
downward movement of portions 63a against the
greatly increase the initial flow of liquid and thereby
ledges 163 in turn engages the top surface of bars 155
remove the need for a waiting period while wick 143
which rotatably support the roller 34. Thus when the
initially soaks up liquid.
rollers 33 and 34 are in sheet moistening position the
The plate 133 also supports a wiper wick locater 146
spacing between the plate 132 and the roller 34 is a
which is formed in a channel. The upper portion of the
?xed amount and the pressure of the channel member
channel has attached to it two pins 147 which extend
138 against the transfer wick is the same regardless of
through slots 14?: in upper surface 134 and. which are
the thickness of paper being fed between the rollers 33
capped by washers 15%. These pins 147 slidably support
and 34:. The pressure arms 63 have at their lower end
the wick locater 146. The rearward leg 151 of the
horizontal
pins 56 which are engaged by lever arms 67
20
channel is bent outward at 152. A wiper wick 153 of
pivoted on pins 67a mounted on the lever arms 36
absorptive felt is held between the leg 151, portion 152
which carry the feed roller 33 and platen roller 35. The
and a depending ledge 154 formed on the plate 133.
levers 67 have blocks as ?xed thereon, and similar blocks
The forward leg 157 of the channel on locater 146 is
69 are ?xed to the lever arms as adjacent to the levers
abutted by a spring 3.55 which is riveted at its center to
67. Springs 73 are interposed between the blocks 68
the forward wall 136 of plate 133. Spring 155 serves 25 and 69 and urge the arms 67 upwardly against the pins
to urge the wiper wick locater 146 in a rearward direc
66 on the pressure arms 63. This force is communicated
tion and holds wiper wick 153 in place. The wiper wick
through the pressure arms 63 to the ledges 163 to bring
153 is not otherwise gripped, so as to be readily replace
the plate 132 against the bars 156 when the rollers 33
able when necessary.
As stated before, the wick assembly is located in the 30 and 34 are brought together. The lever arms 36 are
pivoted downwardly by actuation of the trip levers 39 to
fountain of} by slidably engaging the projections 135 in
lower the platen roller 35 and the feed roller 33 away
the forward grooves 123. The transfer wick 143 rests
from the drum 28 and moistening roller 34 respectively.
at its rearward end on the top portion of moistening
When the arms 36 are lowered the arm 67 is also low
roller 34 and has its forward end supported in pocket
ered away from the pressure arm 63 whereby to remove
138 which is in the fountain liquid. The rear leg T51
the downward pressure from the backing plate 132 to
of the wiper wick locater is positioned adjacent wall 122
prevent wick 143 and roller 34 from developing a ?at
between wall 122 and roller 34. Spring 155 therefore
spot or imperfections in their surfaces when the machine
urges the wiper wick 133 against roller 34. The spring
is left idle.
155 and leg 157 of the channel on the wiper wick locater
The fountain 64? ?is supplied with liquid from a con
are positioned forward of wall 122. The surface 134 of
tainer 71 which is mounted thereover between the side
the plate 133 rests flush with the top surface of the foun
frames 22'} and 21. The container 71 has a ?lling open
tain frame 120, and is rigidly positioned by the projec
ing 72 in the top thereof which is closed by an air and
tions 135.
liquid tight closure 73. The container 71 is supported
The transfer wick backing plate 132 is formed of a
metal sheet which has a flat top portion 163 that is cut 45 at its end adjacent to the side frame 23 upon a depend
ing foot member 74 which rests upon a pedestal mem
at 167. and 162 so as to clear the handles 141 on plate
ber 75 supported at the adjacent end of the fountain 60.
133 in assembly. The outer edges of portion 160 have
As illustrated best in FIGURE 6 the foot 74 has a slot
formed thereon stepped ledges 163 whose function will
76 therein which receives a pin 77 that projects upwardly
be fully explained below. These ledges 163 are spaced
from the pedestal 75' to maintain the container 71 in
beyond the width of the fountain oil.
proper position. At the opposite end of the container
The forward portion of the plate 132 is bent down
71 a valve unit 73 is provided. The valve unit 78 in
wardly at rat to form a cover that fits into frame 123
cludes a downwardly extending outlet 79 which is re
inside the forward wall ?165 of fountain 6t}. Projections
ceived in a well 33 formed in the adjacent end of the
156 which are bent outwardly from portion 164 serve
fountain
6%. A valve actuating stem 81 projects down
55
to vertically position the forward end of plate 132 by
wardly through the bottom of the outlet 79 and rests
resting on the top of frame 12!}. A handle 167 is pro
in the bottom of the well 3%. The stem 81 is connected
vided for lifting plate 132.
A transfer wick engaging and compressing member
to a valve within the unit 78 in such a way that when it
is moved upwardly with respect to the outlet ?7? it opens
163 is positioned directly above the roller 34 so as to
press the transfer wick against the roller 34. This mem 60 the valve that permits the flow from the container 71
through the outlet 79. The stem 31 is spring pressed
ber, as shown, is of channel shape in cross section. This
channel
is suspended from the rear portion of plate
132 by means of two pins 173 riveted rigidly to channel
168. The pins 179 project through apertures cut into
plate 132 and are capped by enlarged washers 171. A
transfer wick spring 172 is riveted at its central section
downwardly to project below the lower end of the out
let 79 and to maintain the valve closed. The construc
tion of the valve unit 7 8 and the connection of the stem
31 thereto is not shown in detail herein since it is identi
cal to the valve mechanism disclosed in my prior Patent
No. 2,856,847 cited above. Suf?ce it to say that the
valve may be opened to permit liquid to ?ow from the
to the top of channel 163 and abuts the lower surface
of the flat portion tea on plate 132. The channel ex
container 71 through the outlet 79 and into the fountain
tends substantially across the width of the transfer wick 70
63 by forcing the valve unit 78 downwardly to bring the
143 and must have a smooth ?at lower surface. In
bottom end of the outlet 79 into engagement with the
assembly, the channel 163 rests on wick 143 directly
bottom of the well 3%, thereby moving the stem 81 up
above and slightly rearward of the adjacent surfaces of
wardly with respect to the valve unit 78. The valve
roller 34 and wick 143. The spring 172 evenly dis
may be closed by removing the downward Pressure
75
tributes pressure from plate 132 to the channel 168 and
8,068,786
7
8
against the valve unit 78 whereby to permit the stem 81
to be spring pressed downwardly to close the valve.
The mechanism for applying downward force on the
provided on shaft 94 for manual operation and loading
valve unit 78 to open the valve and allow liquid to flow
into the fountain so is shown best in FIGURE 3. As
shown in this ?gure lever 82 is pivoted to the side frame
arms 63 and roller 35 are shown in FIGURES 3 and 4.
purposes.
Means for adjustingthe pressure exerted by pressure
A slightly eccentric earn 176 is mounted at each end
of rotatable shaft 24 mounted between plates 20' and
21 on the stub shaft 83. The lever 82 has an offset por
2f. Shaft
extends beyond side plate 21 and has at
tion 82a at its rearward end which carries a valve unit
tached to it a handle 173 to facilitate manual adjustment.
engaging head 34 which is adapted to engage with and
Cams 176 move slidable links 180 which in turn vary the
exert a downward pressure upon the valve unit 78. 10 position of rod 4% to increase or decrease the roller
The opposite end of the lever 83 is pivoted to a vertical
pressure. The adjustable device is fully explained in
link 85 which in turn is pivoted to a crank 86 piv
my prior Patent No. 2,722,885, issued on November 8,
oted intermediate its end on a stub shaft 87 supported
1955 for Pressure Control for Duplicating Machines.
on the side frame 21. The lower end of the crank
The operational controls for the motor 46 and clutch
86 is pivotally connected to a rearwardly extending
4.37 may be of any desired design for automatic, inter-g
link 38 that is connected to the feed roller and platen
mittent or manual operation of the machine. .Such con
roller supporting lever 35 adjacent the side frame 21.
trols are not shown, and do not directly affect the subject
It will be understood from examination of FIGURE
matter of this invention. Therefore they will not be de- 3 that when the lever as is pivoted about its stub
scribed more fully herein.
shaft 37 to bring the platen roller 35 and the feed 20
The operation of this machine is as follows: When
roller 33 into engagement with the drum 28 and the
' the machine is at rest, handle 41 is left in its upper posi
moistening roller 34 respectively, the link 88 pivots the
tion. This releases pressure roller 35 from contact with
crank 86 about its pivot point 87 to cause the link 85
drum 28 and feed roller 33 from contact with moistening
to be moved upwardly. The upward movement of the
roller 34. See FIGURE ll. _t also removes lever arms
link 85 pivots the lever 32 about its pivot point 33 to
67 from contact with pins es on pressure arms 63 there
exert the necessary downward force on the valve unit
by relieving downward pressure on the stepped ledges 163
78 to open the valve therein and permit liquid flow from
on the transfer wick backing plate 132. Only the weight
the container 71. to the fountain 649. When the feed
of the plate 132 remains on the wick 143, thereby pre
roller and platen roller supporting lever arm 36 is pivoted
venting any undue compression or hardening of the wick
downwardly to lower the feed roller 33 and the platen
or roller 34. The valve unit 78 will be released by lever
roller 35, the link 88 pivots the crank 36 in the opposite
32 and will prevent any transfer of additional liquid to
direction to lower the link 85 and pivot the lever 82 up
the fountain 60.
wardly to remove the force from the valve unit 78
When the machine is to be operated,- handle 411 is pushed
whereby to permit the valve to be closed. With this
downward and roller 35 is brought into pressurized con
construction a constant liquid supply is maintained to the
tact with drum 28. As shown best in FIGURE 12, this
fountain 60 at all times when the platen roller 35 and
also urges reed roller 33 into pressing engagement with
the feed roller 33 are in operative position but is not
moistening roller 34. Roller 34 is pushed upward in
supplied to the fountain 6%} when the feed roller 33 and
grooves 138 by the contact of roller 33. The top of bars
plated roller 35 are lowered to inoperative position.
156 supporting roller 34 likewise slide upward as shown
As described later herein, the copy sheets 32 stacked
in FiGURE 3. Bars 156 urge the transfer wick backing
on the feed tray 29 are fed into the bight between the
plate 132 upward. This upward movement is resisted by
feed roller 33 and the moistening roller 34 by the copy
the downward pressure exerted by springs 75} against arms
sheet feeder 31. As shown best in FIGURES 2 and
67, pins 66 and pressure arms d3 which act on stepped
4 the feeder 31 comprises a housing unit 89 pivoted at
ledges 163 to urge the backing plate 132 downward against
one end to a shaft 945 which is journalled between the
the top ends of the bars 156. The distance between the
side frames 26 and 21 in front of the fountain 6d. The
plate 132 and the roller 34 is thus ?xed. However sheets
housing 89 extends forwardly from the shaft 96 and
passing between rollers 33 and 34 may raise roller 34
carries at its forward end a cross shaft 91 which has ,
two sheet feeding rubber wheels 92 ?xed thereon. With
in the housing 89 drive means (not shown) are provided
to rotate the shaft 91 in response to rotation of the shaft
99. Thus, by driving the shaft 90, the copy sheet feed
ing wheels 92 can be driven to slide the top copy sheet
32 from the stack on the feed tray 29 into the bight be
tween the feed roller 33 and the moistening roller 34.
The cross shaft 9i) has a drive roller 93 ?xed thereon
near its end adjacent the side frame 20. The cross shaft
more or less depending on the thickness of the sheets.
The springs 70 absorb this variation and press the arms
67 against the pins 66 to ceep the plate 132 resting on the
bars 156. The transfer wick spring 172 evenly distributes
its ?xed pressure across channel 168 to bear against'the
top surface of the transfer wick 143. This insures a
proper controlled pressure distributed across wick 143 to
contact the moistening roller 34.
s
As previously described, liquid will flow through wick
143 to the moistening roll 34 and will be deposited on
94 journalled between the side frames 23 and 2f behind
roller 34 as it revolves. This liquid is then wiped by the
the shaft 96 carries a quadrantal drive segment 95 there
wiper wick 153, which absorbs any excess liquid and in
on which is aligned to engage with and drive the roller 60 sures the spreading of a uniform liquid film on the moisten
93 for a short period during each revolution of the shaft
ing roller 34. This film is then deposited on the copy sheets
94. The shaft 94% is drivingly connected to the drum a as they are fed between the feed roller 33 and the moisten
shaft 27 by cooperating gears 96 and 97 ?xed to the shaft
ing roller 34. It is to be noted that since the liquid ?lm
94 and the drum shaft 27 respectively adjacent the side
distributed by wiper wick 153 is deposited only while the
roller 34 is rotated, and since roller 34 is rotated only as
frame 20. The gears 96 and 97 rotate the cross shaft 94
a copy sheet is fed into the machine, the moistening of
once for each rotation of the drum 28. Segment 95 is
roller 34 is thereby automatically synchronized with the
so positioned on the shaft 94 that it will drive the roller
input of copy sheets. The wiper wick 153 serves two
93, and consequently the feeder 3i, at the proper time to
purposes. it removes excess liquid from moistening roller
advance a copy sheet to the bight between the rollers 33
and 34 just before the feed roller 33 is driven. As soon 70 34. This liquid is then quickly evaporated or distributed
uniformly along the wick. It also deposits a uniform
as the segment 95 moves past the drive wheel 93, all
?lm
of liquid on the roller 34 if needed, thereby insuring
driving engagement is removed and the shaft 9:?? and the
proper moistening action. Should any liquid fall on feed
feeder wheels 92 are free to rotate as thercopy sheet is
roller 33 it is also quickly evaporated and is of no con
advanced by the roller 33 and 34. A handwheel 174 is
sequence. The absorptive capability of wiper wick 153
3,068,786
-
16
9
substantially parallel to the drum comprising a liquid
removes all need for priming the machine between ?llings.
holding fountain with end extensions directed from the
The transfer wick 143 is immediately ?lled with ?uid when
fountain toward the drum, said extensions having an
lever 82 operates valve
78 to ?ll fountain 60, re
aligned pair of vertical roller guide grooves therein, bear
quiring no initial priming. Every copy sheet is thereby
printed with uniform quality. As the ink on the master 01 ing members rotatably supporting the sheet moistening
roller and seated in said grooves for vertical movement
sheet is Worn off, adjustment of handle 178 will increase
relative to said fountain frame, the fountain frame having
pressure between roller 35 and drum 28 to enable more
stop means thereon adapted to limit the downward move
bright copies to be made.
ment of the moistening roller relative to said fountain
In some applications of duplicating machines it is found
frame, said fountain frame having forward vertical
to be more desirable to employ a roller moistening ap
grooves at the ends of the fountain, a transfer wick sup
paratus in place of the wick assembly just described. Such
porting plate mounted on the fountain frame and having
an apparatus is readily interchangeable in the present
portions removably seated in said forward vertical grooves,
invention and is shown in assembly in FIGURES 13-16.
a wick overlying said plate and secured thereto with one
To make such a conversion, the handle 41 is lifted, thereby
releasing rollers 33, 34 and the pressure arms 63. The 15 end portion of the wick extending into the fountain
and the other end portion extending beyond the plate and
transfer wick backing plate 132 is then lifted and removed
by means of handle 167. The handles 141 are then used
to remove the wick assembly 131 from the fountain 60.
The moistening roller 34 is then lifted out by raising
resting upon the moistening roller.
2. In a duplicating machine having a drum adapted to
mount a master sheet thereon, a platen roller adapted to
the bars 156 out of the grooves 139 in the fountain frame 20 press copy sheets against the drum, a copy sheet feeding
roller and a copy sheet moistening roller adapted to en
120 to complete the disassembly.
gage a copy sheet and advance it to the drum and platen
The three rollers are then set in place. The moistening
roller, the copy sheet feeding roller being movable between
roller 181 is slidably mounted in the rear vertical grooves
an upper position supporting the moistening roller and
130 of fountain ?60 by means of a square bushing 182.
Roller 181 will rest on ledge 124 when not in use. The 25 a lower position spaced from the moistening roller, and
fountain roller 1183 has similar bushing mounts 184 at
each end which are slidably inserted into the forward
grooves 128 of fountain 60. This positions the lower por
tion of fountain roller 183 below the fountain liquid
means adapted to rotate said drum and rollers, the im
186 mounted at both of its ends. These blocks are lo
cated directly below the pressure arms 63 so as to be
_ contacted by the arms 63 when they are lowered. When
roller and seated in said grooves for vertical movement
relative to said fountain frame, the fountain frame having
stop means thereon adapted to limit the downward move
ment of the moistening roller relative to said fountain
provement for supplying liquid to the moistening roller
comprising a generally rectangular fountain frame located
substantially parallel to the drum comprising a liquid
level of the operating machine. A transfer roller 185, 30 holding fountain with end extensions directed from the
fountain toward the drum, said extensions having an
formed of slightly porous resilient material, rests between
aligned pair of vertical roller guide grooves therein, bear
the rollers 181 and 183. The transfer roller 185 is longer
ing members rotatably supporting the sheet moistening
than rollers 181, 183 and has rotatable mounting blocks
handle 41 is lowered, the force of springs 70 will be com
frame, said fountain frame having forward vertical
municated through the pressure arms 63 as a downward
force on the transfer roller 185. Release of the handle
grooves at the ends of the fountain, a transfer wick sup
41 will remove the downward pressure and prevent the 40 porting plate mounted on the fountain frame and having
portions removably seated in said forward vertical grooves,
rollers from developing ?at sections or imperfections in
a wick overlying said plate and secured thereto with one
their surfaces while the machine is idle. Since a roller
end portion of the wick extending into the fountain
moistening apparatus of this general design is shown in
my prior Patent No. 2,856,847 cited above, further de 45 and the other end portion extending beyond the plate and
resting upon the moistening roller, and means overlying
scription of this feature and its operation will not be given.
said wick operable by movement of the copy sheet feed
The use of interchangeable systems of moistening the
ing roller upwardly into position to support the moisten
paper wherein both the wick and the transfer roller are
ing roller to exert a constant pressure upon the portion
pressed by the same mechanical components to provide a
controlled moistening apparatus is the very heart of this 50 of the wick overlying the moistening roller.
3. The invention de?ned in claim 1 wherein the wick
improvement over the prior patents and developments in
supporting plate has an apertured pocket extending into
this ?eld.
the fountain and housing the end portion of the wick that
Various modi?cations may present themselves to one
extends into the fountain.
skilled in the art by use of mechanical equivalents in this
invention. Since the above machine is exemplary of only 55 4. The invention de?ned in claim 1 wherein the wick
supporting plate has a wiper wick suspended therefrom
one application of the invention to a particular duplicating
between the moistening roller and the fountain.
machine, the scope of the invention is not to be limited
5. The invention de?ned in claim 2 wherein said means
to exert a constant pressure on the wick comprises a plate
except as de?ned in the following claims.
Having thus described my invention, I claim:
1. In a duplicating machine having a drum adapted to 60 having a forward portion removably sealed on the foun
tain frame and having a spring mounted bar positioned
mount a master sheet thereon, a platen roller adapted to
rearwardly of the fountain and resting on the wick.
press copy sheets against the drum, a copy sheet feeding
roller and a copy sheet moistening roller adapted to en
References Cited in the ?le of this patent
gage a copy sheet and advance it to the drum and platen
UNITED STATES PATENTS
roller, the copy sheet feeding roller being movable be
65
tween an upper position supporting the moistening roller
and a lower position spaced from the moistening roller,
and means adapted to rotate said drum and rollers, the
improvement for supplying liquid to the moistening roller
comprising a generally rectangular fountain frame located 70
2,262,511
2,722,886
2,754,752
2,830,534
2,867,169
Morrison ____________ .. Nov. 11, 1941
Keil __________________ __ Nov. 8, 1955
Robinson _____________ __ July 17, 1956
Springer et al __________ __ Apr. 15, 1958
Keil __________________ __ Jan. 6, 1959
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