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Патент USA US3025798

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March 20, 1962
3,025,789
w. c. HUEBNER
PRINTING PRESS PLATE TREATING APPARATUS
Filed F‘eb. 24, 1959
4 Sheets-Sheet l
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ATTORNEYS
March 20, 1962
3,025,789
w. C. HUEBNER
PRINTING PRESS PLATE TREATING APPARATUS
Filed Feb. 24, 1959
4 Sheets-Sheet 2
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ATTORNEYS
March 20, 1962
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w. c. HUEBNER '
3,025,789
PRINTING PRESS PLATE TREATING APPARATUS
Filed Peb. 24, 1959
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ATTORNEYS
March 20, 1962
3,025,789
w. c. HUEBNER
PRINTING PRESS PLATE TREATING APPARATUS
Filed Feb. 24, 1959
4 Sheets-Sheet 4
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BY
ATTORNEYS
il ited States Patent Uiitice
3,ÜZ5,789
Patented Mar. 20, 1962
2
1
are hygroscopic and contain certain mineral salts.
3,025,789
_
PRINTING PRESS PLATE TREATING APPARATUS
William C. Huebner, 100 Mamaroneclr Ave.,
Mamaroneck, N.Y.
Filed Feb. 24, 1959, Ser. No. 795,211
3 Claims. (Cl. 101-14-7)
As
stated in. my aforementioned application for patent, this
composition may comprise 350 grams of water thorough
ly mixed with 5 grams of a composition designated as
“carbopol 932.” Then 10 grams of lithium bromide
powder and 17 grams of glycerine are added and the
resulting solution is neutralized by the addition of 18
grams of caustic soda or other alkaline metal. This mix
'Ihis invention relates to apparatus for moistening and
ture is applied to the printing plate with a carpet pad
mixing air with water vapor, metallic salts and other ma
and rubbed manually over the entire plate.
terials and for directing the air thus treated to the surface
In order to maintain a sufficient quantity of moisture
of a printing plate for offset printing and for direct print
in these ink repellent surfaces, it is desirable to supply
1ng.
water to the non-printing surfaces by means of air which
At the present time offset presses are equipped with
is treated with water, but it is also desirable in order to
Water fountains and dampening rollers which wet the
surface of the printing plate, followed by inking rollers 15 maintain the non-printing areas in the desired condi
tion to include in the air which is projected against the
that apply ink to the images, both sets of rollers contact
printing plate some metal salts and other materials. The
ing the entire plate surface. Each time the printing
metal salt, which has been found to be very satisfactory
starts, it is necessary with this prior apparatus to bring
for use in connection with the liquid which is used to
the water and ink deposit into balance. Too much water
produces gray impressions due to the fact that the ink 20 treat the air, is lithium bromide and a small quantity
of this material is consequently included in the water
becomes water logged or emulsified and thus loses its
which is used to treat the air. It is also desirable to add
body so that the image printed on paper is not in full
glycerine to this solution and some caustic soda or other
color. Too little water causes the plate to scum and dry
alkaline metal salt to neutralize the acidity of the solu
quickly with the result that the ink fills up the dry area.
A good many sheets of good paper are spoiled or wasted 25 tion. A newly developed product known as “carbopol
932” is preferably also added.
while attempting to attain the correct water `and ink
balance.
I have provided a printing plate disclosed in my co
pending application Number 790,586 filed February Z,
1959, in which the non-printing areas of the plate are
formed of a composition which is capable of absorbing
suñicient moisture from humidiñed air to make it ink
repellent, and it is consequently an object of this inven
tion to provide apparatus and a method by means of
which moisture is supplied to the non-printing surfaces
of a printing plate, or to other surfaces.
It has also been found that certain metallic salts have
This solution is contained in any suitable reservoir or
container, that shown including a tube 12 extending
lengthwise above the apparatus and having a plurality of
outlets through which liquid is discharged. In the con
struction shown for this purpose, there are provided at
intervals lengthwise of this tube l2 a series of discharge
ducts 142, all leading to an air and liquid mixing device.
In order to control the amount of liquid discharged from
35 the tube 12, each of the discharge tubes 14 is preferably
provided with a sight glass 1S and a control valve ad
justable by means of a handle 16 so that the operator
can determine the rate of ñow or number of drops per
the property of repelling ink, and a further object of this
unit of time of the liquid through each discharge tube la.
invention is to provide apparatus of this kind by means of
The liquid from the discharge tubes 14 passes into a
which air projected to the printing plate also contains at 40
distributing tube or conduit 19= also extending length
least one of these metallic salts.
wise of the apparatus and receiving air under slight pres
It is also an object of this invention to provide ap
sure from a manifold 20 having a series of air discharge
paratus which confines the treated air mainly in the
ducts 2l terminating in the distributing tube 19.
vicinity of the press so that the air in the room in which
The mixing of the air with the liquid takes place in an
the press is located will not be materially effected by 45
elongated box-like structure or housing 24, the length of
means of my improved apparatus.
which is substantially equal to the length of the printing
In the accompanying drawings:
roll. The upper and lower longitudinally extending por
FIG. l is a face view of apparatus embodying my in
vention for treating air and directing the same to a print
ing plate.
FIG. 2 is an end View thereof as seen from line 2_2,
tions of this housing contain -a porous sponge-like ma
This sponge-like material may be of a syn
50 terial 25.
thetic porous composition which is readily permeable by
moisture and air and the liquid from the tube 19 may be
FIG. 1.
discharged to the sponge-like material 25 in any desired
FIG. 3 is a sectional plan view thereof on line 3_3,
manner. For example the distributing tube may be pro
FIG. 2.
FIG. 4 is a transverse sectional View thereof on line 55 vided at intervals lengthwise thereof with holes 0r open
ings 26 arranged in the lower portion thereof in registra
¿_1-»4, FIG. l.
tion with holes 27 formed in the housing 24 so that the
FIG. 5 is a fragmentary bottom view thereof.
liquid and air contained in the tube 19 will be forced by
FIG. 6 is a fragmentary sectional elevation taken ap
the air in the tube 2l directly into the sponge-like mass
proximately on line 6-6, FIG. 4.
FIG. 7 is an enlarged fragmentary sectional view there 60 25. Preferably the liquid is discharged into the upper
portion of the tube I9 through the liquid discharge tubes
of on line 7-7, FIG. 6.
I4 in spaced relation or lapproximately midway between
My apparatus may be mounted on yany desired part of
a printing press, but preferably is arranged at a side of
the discharge openings 2.6, as shown in FIG. `6, and air
the printing roll in advance of the inking roller. lil
may be discharged adjacent to the discharge openings 26
represents a printing roll ’having a plate lll mounted on 65 through the air discharge tubes 2l so that the air blows
the surface thereof. My apparatus extends completely
the liquid through the registering openings 26 and 27 into
across the press to project treated air to all parts of the
the sponge-like mass. I have shown the liquid discharged
printing roll as it rotates, and my apparatus may be
only into the upper of the two sponge-like masses 25, but
mounted on the frame of the printing press in any desired
if desired similar means may be provided for discharging
manner, not shown.
70 liquid and air into the lower` sponge-like mass.
r[he non-printing portions of the plate forming the
28 represents angle bars which are secured to the
subiect matter of my forementioned application for patent
.22,025,789
3
4
housing 24 and serve to form parts of a wall thereof and
In the operation of the apparatus, when liquid is sup
to conñne the sponge-like material in the housing.
The liquid contained in the sponge-like mass or masses
25 is conducted to an air current or series of air currents
directed into the box-like housing 24 from the rear there
of, this housing being open at the front to direct humidi
fied air against the plate 11 on the printing cylinder 1i).
plied at the correct rate and air under pressure greater
than the air from the blowers 30 to the sponge or sponges
25, and the blowers 30 are in operation and the roll 41
imparts rotation to the belts '40, the air from the blowers
which may be heated if desired, is forced to pass between
these belts, which are wet with liquid contained in the
This air is preferably directed by means of a series of
fans or blowers 30 driven by motors 31 directly connected
sponge or Sponges and crosswise of currents of air from
back of the box-like housing 24. It is, of course, very
liquid.
desirable to provide a substantially uniform ñow of air at
against the printing plate 11 of the roll 1t) and imparts
all portions lengthwise of the box-like housing and for
this purpose the blowers have their discharge outlets alter
nately arranged at different elevations.
To further provide for a uniform discharge of air from
moisture and some of the substances contained in the
liquid to the ink-repellent surfaces of the plate so as to
the air passages 21, which has passed through the upper
to the rotors of the fans or blowers. The blowers shown 10 sponge 25. This air from the blowers 30 in passing cross
wise of the air currents from the sponge 25 and through
by way of example are of the centrifugal type having dis
the small spaces between the belts, picks up moisture from
charge ducts 32, each of which terminates at an opening
the belts as well as other substances contained in the
in the back wall of an air chamber 33 arranged in the
the air chamber 33, a screen or grid 36 is provided which
separates the air chamber from the open faced end of
the box-like housing 24, this screen or grid 36 extending
throughout the length of the housing 24. The opposite or
front face of the housing 24 is open and positioned in
This air is consequently discharged directly
keep these surfaces suñiciently moist to repel ink. Since
these ink-repelling surfaces of the printing plate contain
hygroscopic materials, these materials will assist in the
ready absorption of moisture from the humidiiied air
blown against them, and since some of the hygroscopic
materials are picked up by the paper during printing, they
are replaced by similar substances contained in the liquid
25 which is supplied to the air. The ink-receiving surfaces
the immediate vicinity of the printing cylinder.
of the printing plate have no tendency to pick up moisture
The air from the air chamber 33- is moistened by the
from the air, and since the apparatus described can be
carefully regulated so that no droplets or particles of
moisture will be carried by the air to the printing plate,
ber of small closely spaced belts 40 are provided which
pass over rollers 41 and 42 arranged in contact with the 30 it follows that moisture will only be absorbed from this
air by the non-printing portions of the plate. This over
sponge portions 25. At least one of these grooved roll
comes the possibility of contaminating the ink on the
ers is driven in any suitable manner so that the belts are
liquid from the Sponges 25 in any suitable manner, and
in the construction shown for this purpose a large nurn
carried into contact with a damp sponge or Sponges to
inked surfaces of the plate by water and consequently
overcomes the difliculty heretofore encountered, in that
become coated with liquid and to pass across the path
of air from the air chamber 33. Any desired means may 35 particles of water became deposited on the ink surfaces
and thus interfered with the production of high grade
be provided for driving one or both of these rollers, and
printing.
in the construction shown, see particularly FIGS. 2 and
The apparatus `described is Very reliable in operation
3, only the upper roller 41 is driven from a motor 45, the
»and requires very little attention. When the feed of
shaft of which has a pinion 46 secured thereto which
liquid for one printing plate has been determined by set
drives a gear 47 mounted on a shaft also having a sprocket
ting of the liquid supply valves, little or no adjustment is
gear 448 secured thereto. This sprocket gear drives a
required when the apparatus is used on another printing
sprocket chain 50 which passes over a pair of idler
plate. Consequently there is a reduction in the delay in
'sprocket gears >51 and 52 and over a sprocket 54 mounted
the operation of the press when changing from one print
'on vthe shaft of the upper roller 41. The sprocket gears
ing job to another and little or no paper is wasted in ad
and chain are preferably arranged in a drive housing 49
justing the feed of water as was necessary with this type
secured to the Imain housing 24 and comprising two Walls
of printing ias heretofore carried on.
55 and v56. The drive motor 45 is mounted on the ex
By replenishing on the ink repellent portions of the
terior 'of the drive housing.
printing plate the substances removed therefrom by the
The sprocket wheel 54 is preferably detachably con
nected with the upper roll 41 and for this purpose, FIGS. 50 paper during printing, the effective life of printing plates
is greatly increased by my `improved printing process as
6 and '7, the sprocket wheel 54 has an enlarged hollow
herein described, thus making it possible to print much
hub 57 provided with a central opening into which a
larger editions from a plate than was heretofore possible.
`spring' loaded drive pin 58 extends, the pin having an
enlarged flange or head 59 at one end thereof which has
a driving extension 60 provided with a ñat outer face.
The roll 41 has a bore in the end thereof adjacent to the
sprocket wheel 54 into which the end 60 of the head 59
may enter. This bore has a ilat inner face forming a
It is desirable of course to `avoid as much as possible
the discharge of the treated air from the apparatus de
scribed into the atmosphere in which the printing press
is operating, and for this purpose I provide along the
upper and lower edges of the housing 24 suction tubes 65
which have air-receiving openings 66 on the portions
driving connection with the drive pin 5S. The other end
of the sprocket 54 is bifurcated, thus providing a slot 62 60 thereof facing each other. These tubes Iare connected at
their outer ends with suitable suction ducts 67 which are
and the drive pin 58 has a cross pin 63 extending through
partly shown in FIG. 1, and which may be connected
the same which tits into the slot between the projection
with any suitable air-exhausting system not shown. In
62, thus completing a drive connection between the
this manner the air which has been discharged to the
sprocket wheel 54 and the roll '41. The pin is provided
printing plate and deflected therefrom is drawn by suc
at the outer end thereof with a knurled knob 64. Con
tion into the tubes 65 from which it m-ay be discharged
sequently, when it is desired to disconnect the sprocket
to the exterior of the building in which the press is located,
wheel 54 from the roll 41 it is merely necessary to pull
or returned to the apparatus for further treatment. These
out the pin 58 until the flattened end portion of the
collar 59 is out of the roll 41 and the cross pin is out
suction ducts in the construction shown are secured to
pin 58, the cross pin 63 may be brought to rest on the
able manner, for example, by means of strips or plates 68
secured to the ducts vand held on the housing by means
of the slot in the hub 57, whereupon, by turning the 70 the upper and lower `faces of the housing 24 in any suit
ends of the projections 62 of the bifurcated part of the
hub 57, thus holding the sprocket wheel 54 disconnected
from the roll 41. Any other means may be provided for
detachably connecting the roll 41 ’from its driving means. 75
of screws 69 passing through keyhole slo-ts in strips or
plates which permits them to be readily removed if de
sired.
3,025,789
5
The air which passes to the upper sponge from the air
ducts 21 passes through the upper sponge 25 from which
it picks up liquid contained in the sponge and is dis
charged therefrom for movement ‘crosswise of the air
from the blowers 30. This air consequently picks up
moisture »and other substances both from the air which
has passed through t-he sponge 25 and from the belts 40
6
plate «and having la discharge opening at `a side> thereof
directed toward said plate, and an air chamber in the op
posite side thereof, blowers for delivering air to said air
chamber, a screen separating said lair chamber from the
remainder of said 'housing and for equalizing »the flow of
air through said housing, a plurality of air moistening
members in close proximity to each other in said housing
‘and movable across said housing for contact with the air
and carries it to the type plate 11.
flowing through the same, la porous, llexible body in the
While I have shown my improvements as applied to a
printing plate mounted on ya roll, it will be obvious that 10 upper portion of said housing with which said movable
members contact to receive liquid to be carried across
my apparatus may equally well be -applied to ñat printing
said air, a. liquid distributing tube extending lengthwise of
plates, which may pass back and forth across the dis
said housing and connected with said porous body for sup
plying liquid thereto, means for supplying measured quan
coating paper or other sheets or webs and for applying 15 tities of liquid to said distributing tube, and air supply
ducts connected with said distributing tube for moving
coating to metal sheets. Obviously the liquid supplied to
liquid from said tube into said porous body.
the upper sponge may be varied greatly to suit different
3. Apparatus for treating Ia printing press plate includ
coating requirements.
ing ya housing Iformed to extend lengthwise of a printing
The air which passes through the upper sponge 25 car
charge opening of the housing. It will, of course, be ob
vious that my improved apparatus may be employed for
ries with it suñicient moisture and other ingredients to 20 plate and having 1a discharge opening at a side thereof
directed toward said plate, :and yan air chamber in the op
keep the lower sponge 25 wet. Also some moisture which
posite side thereof, blowers for delivering `air to said air
is not picked up from the belts 40 passes to the lower
chamber, a screen separating said air chamber from the
sponge with the result that this sponge also moistens the
remainder of said housing `and `for equalizing the ilow of
upwardly moving portions of the belts 40 »so that ample
liquid as well as substances contained therein is fed across 25 air through said housing, a plurality of air moistening
members in close proximity to each other in said housing
'and movable across said housing for contact with the air
ñ‘owing through the same, a porous iiexible body in the
tails, materials and arrangements of parts, which have
upper portion of said housing with which said movable
been herein described and illustrated in order to explain
the nature of the invention, may be made by those skilled 30 members contact to receive liquid to be carried across
said air, a liquid distributing tube extending lengthwise
in the ait, within the principle and scope of the invention,
of said housing and connected with said porous body yfor
as expressed in the appended claims.
supplying liquid thereto, means for supplying measured
I claim:
the currents of air yfrom the blowers 30.
It will be understood that various changes in the de
l. Apparatus for treating a printing press plate includ
quantities of liquid to said ldistributing tube, :and air sup;
ing va housing formed to extend lengthwise of a printing 35 ply tubes terminating at said porous member for blow
ing air through said porous member to the discharge open
plate and having a discharge opening at a side thereof
ing of said housing.
directed toward said plate, lair moving means for directing
air through said housing Iand through said discharge open~
References Cited in the file of this patent
ing toward said plate, a plurality of belts arranged in close
proximity to each other and spaced apart to permit air to 40
UNITED STATES PATENTS
pass between them land extending across the path of air
2,101,202
Stevens _______________ __ Dec. 7, 1937
from said air moving means to said discharge opening,
2,108,984
2,288,287
Grembecki _____ ...... __ Feb. 22, 1938
Kokay ____ ___________ _.. .lune 30, 1942
ble body in said housing against which said belts rub for 45 2,569,488
2,681,617
coating said belts with liquid to be transmitted to the air
2,856,848
by evaporation, and means yfor supplying liquid to said
porous body.
2. Apparatus for treating a printing press plate includ
175,956
ing a housing formed to extend lengthwise of a printing 50
Newman ______________ __ Oct. 2, 1951
wormen _________ ---___ Junezz, 1954
rollers over which said belts pass and which are rotated
to move said belts across the path of air, a porous flexi
Pritchard __ ___________ __ Oct. 21, 1958
FOREIGN PATENTS
Austria ______________ __ Feb. 15, 1953
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