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Патент USA US3037461

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June 5, 1962
- .
w. F. DAVIS
MACHINERY FOR FLUID TRANSFER ANDv APPORTIONING
Filed Feb. 20, 1959
W“
; 3,037,450
United States Patent @??ce
3,037,450
Patented June 5, 1962
2
1
vided with a ‘fountain and ?uid ?lm thickness regulating
3,037,450
MACHINERY FOR FLUID TRAN§FER
AND APPGRTIGNING
William F. Davis, Windsor, NJ.
blade, said regulating blade being regulated by a series
of screws 4 which are axially disposed along the length
of the blade, and a ?uid taking drum rotating in the
opposite direction as the ?uid supply drum. All these
components are of conventional form. Now, the ?uid
Filed Feb. 20, 1959, Ser. No. 794,738
taking ‘drum 5 is located very close to the ?uid supply
8 Claims. (Cl. 101-—350)
'
drum 1 and a transfer blade 7 is disposed an edge in ‘the
proximity of the line of centers of the supply and ?uid
The present invention relates to new and useful im
provements in machinery for transferring and apportion 10 taking drums with its major axis radiating outward be
, tween the diverging surfaces of the drums. This blade
ing of ?uids. More particularly, the invention 1s con
is actuated to skim ?uid ‘from the ?uid supply drum and
cerned with ?uid transfer and apportioning as applied to
then to traverse the small space separating the drums and
the inking mechanism of printing presses.
thence deposit the ?uid on the ?uid taking drum.
Objects and advantages of the invention will be set
In order to print an image with high ?delity the ink
forth in part hereinafter and in part will be obvious here— 15
feed should be as continuous as possible, to avoid tonal
from, or may be learned by practice with the invention,
variations etc. In practice it has been found necessary
the same being realized and attained by the instrumen
to rotate the ?uid ink supply drum at relatively slow
talities and combination pointed out in the appended
speeds as compared to the high speed rotation of the ?uid
claims.
_
The invention consists in novel parts, constructions, 20 taking drum. This necessitates an oscillatory transfer
(R0. Box 179, Hightstown, NJ.)
arrangements, combinations and improvements herein
described and disclosed.
-
element, which heretofore has been made to traverse a
large space for various reasons. Ductors on high speed
printing equipment are made to cycle 'as fast as possible;
The accompanying drawings, referred to herein and
the limiting factor being the pounding induced by the
constituting a part hereof, illustrate the embodiments of
the invention, and together with the description, serve to 25 oscillatory forces.
In the present invention these forces have been reduced
explain the principle of the invention.
in magnitude, to permit the increase in duct cyclic rates,
The present invention has for its object the provision
by two means. The ?rst was the reduction of the space
of a novel and improved method of transferring and ap
between the two drums, which coact with the transfer
portioning ?uid, such as ink, and the machinery to ac
blade, to a constant value of approximately 25% of that
complish this improved method of ?uid transfer and
The prime object of the present invention is to provide
employed previously thereby reducing the forces, induced
by the transfer element, in direct proportion. The second
a very high speed ?uid transfer means to transfer ?uids
means of improvement was the employment of a driving
apportioning.
such as ink from slowly moving supply drums to high
speed rotating ?uid taking drums.
A second object of the invention is to provide a simple
means to shut off the ?uid ?ow from the ?uid fountain
means, described below, which reduced the polar moment
35 of inertia, comparable to the radius of \gyration in many
ductor con?gurations, to a value 20% of that found in
conventional ductor transfer mechanisms. This reduces
the elastic de?ections as well as the need for massive
drum to the other machine components.
rigid mechanism components since the effect of the polar
A further object of the present invention is to provide
a simple positive means to apportion the ?uid along the 40 moment is a square function.
The discovery of the ink transfer technique of the pres
length of the ?uid handling drums in short independent-1y
ent invention therefore makes it feasible to increase the
controlled increments.
cyclic oscillatory rates of ink transfer by a factor of the
Other objects and advantages of the invention will be
order of 100. This high speed transfer of ink permits
come apparent to those skilled in the art.
the high ?delity reproduction of printed images hereto
Referring to the drawings:
fore not possible. Referring to FIGURE 2, this drawing
FIGURE 1 is a schematic representation of the present
discloses how the ink feed may be shut off in page wide
invention depicting the basic components and their rela
increments as is often necessary when the page capacity,
tionship to each other.
or width being printed, is reduced.
FIGURE 2 is a diagrammatic presentation of the ap
portioning ‘and shut off control components as well as a
form of the driving and supporting mechanism.
While the invention is. susceptible of various modi?ca
Heretofore page wide shut off devices have functioned
on the fountain roll, the fountain, or employed special
reduced covering rollers. In FIGURE 2, a frame 9 sup
ports a plurality of levers 10 across the Width of the
tions and alternate constructions and uses, I have depicted
in the drawings and disclosed in detail herein preferred 55 machine. Levers 10 are positioned on the frame 9 by
two means. The ?rst provides independent control of
embodiments of the invention. It is understood, however,
each lever and therefore each blade 7 across the machine
that the broader aspects of the invention are not limited
width. This ?rst positioning means comprises a plurality
to the speci?c mechanisms shown and described but de
of adjusting screws 14, one for each blade 7, and a ,
partures maybe made therefrom within the spirit and
scope of the accompanying claims without sacrificing its 60 plurality of springs, or resilient means, 12 to oppose the
action of the screws 14, or the cam detent bar 11. The
concomitant bene?ts and advantages. Therefore, I do not
second positioning control is a collective mechanism
intend‘ tolimit the invent-ion by the aforesaid drawings
employing the above parts with the cam bar 11. Cam
and description but intend to cover all modi?cations and
bar
11 is shown with the transfer blades in the operating
alternate constructions falling within the spirit and scope
position, with the screws 14 controlling each blade. When
of the invention as expressed in the appended claims.
65 cam bar 11 is rotated 180 degrees it contacts a page
In the following, the invention will be disclosed as ap
group of blades 7, i.e. their levers 10 and moves them
plied to a publication printing press, to illustrate a par
against the springs 12, pivoting the working edge of the
ticularly well suited application of the invention, and
blades 7 away from the ink supply drum a distance great
therefore the terminology will conform to that employed
enough to preclude pick up of ink, thereby shutting off
in such machinery. In accordance with the illustrative 70 the ink feed along that length of the ink motion.
embodiments shown in FIGURES 1 and 2 the transfer
mechanism comprises a rotating ?uid supply drum pro
The number of blades disposed across the machine is
‘ usually made to conform to .the?number of columns being,
3,037,450
4
a
6
blade in such manner as to cause said blade’s working edge
or capable of, being printed. As can be seen in the phan
tom image in FIGURE 2 the working edge of the blade 7
is presented to the supply drum 1 in a non tangential
relationship. The pivoting of the levers 10 therefore
varies the distance of the blade’s edge to the drum 1 and
therefore the depth of ink intercept, which in turn controls
and side to traverse through an excursion, at high speed,
presenting said transfer blade to said ?uid supply drum
in a non tangential relationship, scooping or skimming
?uid from said supply drum and collecting it on said side
of said transfer blade, and then traversing said space to
the volume of ink skimmed from the ink supply drum.
The transfer blade functions by skimming a volume of
said ?uid taking drum and presenting said blade’s side to
said ?uid taking drum in an approximately tangential rela
tionship permitting the ?uid to be wiped from said transfer
?uid from the supply drum with the blade’s working edge,
collecting this volume of ?uid on the side of the blade, 10 blade by said ?uid taking drum.
2. A ?uid transfer mechanism comprising, in combina
then moving across the gap between the drums l and 5
tion, a rotating ?uid supply drum with fountain, regulat~
and presenting the blade’s side to the ?uid taking drum 5
ing blade and axially disposed ?uid ?lm regulating means;
in a tangential relationship with drum 5 to permit the
When a drum rotates at high speed and a blade is
brought close to its surface in a tangential relationship as
a ?uid taking means initiating with a rotating drum dis
posed parallel to said ?uid supply drum and with a small
space separating said drums; a plurality of axially dis
is required to wipe the ink from the transfer blade 7 there
posed transfer blades with their working edge in the
drum to wipe the ?uid from the blades 7.
occurs a pressure and a velocity head, similar to the
proximity of the line on centers of said drums and
hydrodynamic pressure developed in journal hearings, in
said blades’ major axis radiating outward between the
surfaces of said drums; said ?uid supply drum rotating
the ?uid between the blade 7 and the drum 5. As the
?uid issues past the blade this pressure tends to induce
spraying, or splattering, of the ink ?lm. This effect is
to cause its periphery to move from said regulating blade
to the working edge of said transfer blades and then past
said transfer blade; said ?uid taking drum rotating in the
materially reduced by causing the blade '7 to have its
opposite direction to said ?uid supply drum; a frame on
working surfaces and edges actuated to traverse an excur
sion which conforms closely to the surface of the drum 5
when the ink is being wiped from the blade. The condi~
Y which said transfer blades are positionable in an operat
ing and a nonoperating position, said nonoperating posi
tion facilitating shut off of ?uid transfer along the axial
length of the mechanism controlled by said blade or
tion is particularly improved with the blade moving
through the excursion in the direction which conforms
with the direction of motion of the periphery of drum 5
at the transfer of ?uid. This mode of blade motion
blades, a driving means to displace and support said frame
minimizes the major pressure head which is developed by
edges and sides to traverse through an excursion, at high
speed, presenting said transfer blades’ edges to said ?uid
in such manner as to cause the transfer blades’ working
the difference in velocities of the drum 5 and the blades 7,
and results in a satisfactory ?uid transfer.
In the descriptions above and the claims the word ?uid
has been used to simplify the disclosure. By ?uid I in
supply drum in a nontangential relationship, scooping
or skimming ?uid from said supply drum and collecting
it on the side of said transfer blades, and then traversing
the space to said ?uid taking drum and presenting the
sides of said transfer blades to said ?uid taking drum
in a tangential relationship permitting the ?uid to be
wiped from said transfer blades by said ?uid taking
clude homogeneous ?uids, solutions of homogeneous ?uid,
mixtures of ?uids and solids or other ?uid, and the like
substances.
The driving means mentioned above to ac
tuate the transfer blades 7 through the desired excursions
is depicted in a preferred construction in FIGURE 2. 40 drum.
The driving element is a crank 8 which supports the
3. A ?uid transfer and apportioning mechanism com
prising, in combination, a rotating ?uid supply drum with
fountain or regulating blade restricting the application of
frame 9 at one end and drives it as a drag link of the
four bar linkage. The lever 6 guides and supports the
other end of the frame 9. In the construction shown it
has been found advantageous to have the blades 7 made
of a resilient material. Referring to FIGURE 2, the
phantom line loop 15 depicts the path or excursion of
the working edge of the blade 7. It is clear that there
?uid to said supply drum to a uniform thick ?lm around
the periphery moving past said regulating blade; a ?uid
taking means initiating with a rotating drum disposed
parallel to said ?uid supply drum and with a small space
separating said drums; a plurality of axially disposed
blades with their working edge in the proximity of the
line of centers of said drums and their major axis radiat
ing outward between the diverging surfaces of said drums;
said ?uid supply drum rotating to cause its periphery to
move from said regulating blade to said working edges
of said transfer blades and then past said transfer blades;
are many equivalent mechanisms which can cause the
blade to transverse the required excursion at the preferred
velocities and with the blades actuated to present the
working surfaces and edges to the drums as disclosed
above and the disclosure of the four bar linkage is made
as a preferred con?guration which is not intended to
limit the invention.
said ?uid taking drum rotating in the same direction as
said ?uid supply drum; a frame on which said transfer
blades are positionable individually to vary the minimum
While the above speci?cation and the drawings depict
the drum 5 rotating in the opposite direction to the supply
drum 1 it is clear the rotation may be reversed and all
distance from the working edge of said transfer blades
the bene?ts of the invention realized. When the direc
to the surface of said ?uid supply drum thereby apportion
tion of the drums 1 and 5 is the same it is preferred to
ing individually controllable quantities of ?uid to each of
also reverse the direction of the driving crank’s S rotation. 60 said axially disposed transfer blades in proportion to the
What I claim is:
depth of the ?uid to be skimmed from said ?uid supply
1. A ?uid transfer mechanism comprising, in combina
drum by each blade, and a driving means to displace and
tion, a rotating ?uid supply drum with fountain, regulat
ing blade and axially disposed ?uid ?lm regulating means;
a ?uid taking means initiating with a rotating drum dis
support said frame in such manner as to cause said trans
fer blades’ working edges and sides to traverse through
' an excursion, at high speed, presenting said transfer
blades’ working edges to said ?uid supply drum in a non
posed parallel to said ?uid supply drum and with a small
space separating said drums; a transfer blade with its
working edge in the proximity of the line of centers of
said drums and said blade’s major axis radiating outward
between the diverging surfaces of said drums; said supply 70
drum rotating to cause its periphery to move from said
tangential relationship, and then transversing the space
to said ?uid taking drum and presenting the side of said
transfer blades to said ?uid taking drum in an approxi
mately tangential relationship permitting said ?uid to be
wiped from said transfer blades by said ?uid taking
regulating blade to the working edge of said transfer blade
drum.
and thence past the transfer blade; said ?uid taking drum
4. A ?uid transfer and apportioning mechanism ac
rotating in the opposite direction to said ?uid supply drum;
cording to claim 3 wherein the transfer blades are ar
and a driving means to displace and support said transfer 75 ranged in groups of axially disposed transfer blades, each
3,037,450
5
6
group being individually positionable in an operating and
a nonoperating position on said frame, said nonoperating
position facilitating the shut off of ?uid transfer of the
7. A ?uid transfer mechanism comprising, in combina
tion, a rotating ?uid supply drum; a ?uid taking means
group of transfer blades collectively so positioned.
5. A ?uid transfer mechanism comprising, in combi
nation, a rotating ?uid supply drum; a ?uid taking means
parallel to said ?uid supply drum and with a small space
separating said drums; a ?uid transfer blade with its
initiating with a rotating drum disposed parallel to said
comprising and initiating with a rotating drum disposed
working edge in the proximity of the line o-f'centers of
said drums and its major axis radiating outward between
the surfaces of said drums; a four bar linkage comprising
?uid supply drum with a small space separating said
a movable frame supporting said transfer blade, a driven
drums; a transfer blade with its working edge in the
proximity of the line of centers of said drums and its 10 rotating crank supporting one end of said movable frame
major axis radiating outward between the diverging sur
and also displacing and oscillating said movable frame,
and a lever supporting, guiding and controlling the mo
tion of said movable frame in cooperation with said crank;
said linkage proportioned and constructed to cause said
a rotatable crank supporting one end of said movable
frame and displacing and driving said linkage mechanism 15 transfer blade to be presented to said ?uid supply drum
in a non-tangential relationship to said ‘drum and mov
through a cyclicly recurring excursion, and a lever sup
ing slowly through this portion of its excursion, then to
porting and controlling the motion of said movable frame
traverse said space to said ?uid taking drum and present
in cooperation with said driving crank; said four bar
the transfer blade to the ?uid taking drum in a tangential
linkage proportioned and constructed to cause said trans
relationship to said drum and traverse an excursion which
fer blade to be presented to said ?uid supply drum in a
maintains this tangential relationship for a relatively long
nontangential relationship to said drum, then to traverse
period of time while said transfer blade is moving rapidly
said space between said drums and present said trans
through the tangential portion of the excursion in the
fer blade to said ?uid taking drum in a tangential rela
same direction of motion as said periphery of said coact
tionship to said drum, then to return to said ?uid supply
drum and repeat said excursion.
25 ing fluid taking drum, then to return to said ?uid supply
drum and repeat said cycle; said driven crank rotating at
6. A ?uid transfer mechanism comprising, in combina
a rate of rotation proportional to the rate of the ?uid tak
tion, a rotating ?uid supply drum with fountain, regulat
ing means.
ing blade and axially disposed ?uid ?lm regulating means;
faces of said drums; a four bar linkage mechanism com
prising a movable frame supporting said transfer blade,
a
t
a ?uid taking means initiating with a rotating drum dis
8. A ?uid transfer means as set forth in claim 7 where
posed parallel to said ?uid supply drum and with a
small space separating said drums; a transfer blade with
its working edge in the proximity of the line of centers
of said drums and said blade’s major axis radiating out
ward between the diverging surfaces of said drums; said
?uid supply drum rotating to cause its periphery to move 35
in said four bar linkage mechanism comprises a plurality
of said cranks rotating in synchronism and axially dis
from said regulating blade to the working edge of the
disposed at the lateral ends of said movable frame.
posed at the lateral ends of said movable frame; and a
plurality of said levers supporting said movable frame
and guiding and controlling the motion of said frame in
cooperation with said cranks, said levers being axially
transfer blade and then past said transfer blade; said
?uid taking drum rotating in the same direction as said
References ‘Cited in the ?le of this patent
?uid supply drum; and a driving means to displace and
UNITED STATES PATENTS
support said transfer blade in such manner as to cause
said blade’s working edge and side to traverse through
an excursion, at high speed, presenting said transfer blade
to said ?uid supply drum in a nontangential relationship,
scooping or skimming ?uid from said supply drum and
collecting it on said side of said transfer blade, and then
traversing the space to said ?uid taking drum and pre
senting the side of said transfer blade to said ?uid taking
drum in a tangential relationship permitting the ?uid to
be wiped from said transfer blade by said ?uid taking
50
drum.
1,185,669
1,185,670
1,514,991
Hoe _________________ __ June 6, 1916
Hoe _________________ __ June 6, 1916
Rees ________________ __ Nov. 11, 1924
1,982,830
2,817,293
‘Richter ______________ _._ Dec. 4, 1934
Willard ______________ __ Dec. 24, 1957
1,073,166
lFrance ______________ __ Mar. 17, 1954
FOREIGN PATENTS
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