U.S. patent number 3,696,743 [Application Number 05/017,094] was granted by the patent office on 1972-10-10 for apparatus for regulating a color dosing device in relation to a color doctor roller.
This patent grant is currently assigned to Veb Druckmaschinenwerk Planeta. Invention is credited to Hans Johne, Kurt Reichenberger, Gunter Schumann.
United States Patent |
3,696,743 |
Johne , et al. |
October 10, 1972 |
APPARATUS FOR REGULATING A COLOR DOSING DEVICE IN RELATION TO A
COLOR DOCTOR ROLLER
Abstract
Apparatus for controlling a color dosing device in relation to a
color doctor roller wherein the entire color dosing device, under
retention of the support line between the color knife and the color
profile lever is pivotable about a fulcrum point for the purpose of
setting the color slot, characterized in that for the purpose of
changing the blade angle or clearance the entire color dosing
device is pivoted about the fulcrum point without changing the
color slot and the fulcrum point is shifted a distance
corresponding to the change in the color slot whereby the
individual color profile levers which act on the edge of a color
knife are separately pivoted for setting the color profile and all
of the color profile levers are jointing pivoted for parallel
setting of the color knife and color profile storage.
Inventors: |
Johne; Hans (Radebeul,
DT), Schumann; Gunter (Radebeul, DT),
Reichenberger; Kurt (Radebeul, DT) |
Assignee: |
Veb Druckmaschinenwerk Planeta
(Badebeul, DT)
|
Family
ID: |
11276527 |
Appl.
No.: |
05/017,094 |
Filed: |
March 6, 1970 |
Foreign Application Priority Data
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Jun 11, 1969 [IT] |
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52198 A/69 |
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Current U.S.
Class: |
101/365 |
Current CPC
Class: |
B41F
31/04 (20130101) |
Current International
Class: |
B41F
31/04 (20060101); B41f 031/04 () |
Field of
Search: |
;101/365,350,363,157,169,208,207 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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863,346 |
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Jan 1953 |
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DT |
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116,596 |
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Nov 1924 |
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CH |
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Primary Examiner: Fisher; J. Reed
Claims
What is claimed is:
1. In a sheet fed printing press, an automatic control device for
controlling color dosing means in relation to a color doctor roller
wherein for setting of the color slot the entire color device is
mounted for pivoting movement about a fulcrum under retention of
the support line between the color knife and color profile levers,
said color dosing means being pivotally mounted for pivoting of
said entire color dosing means on pivotable eccentrics, said
eccentrics being mounted on a traverse, the eccentricity of said
eccentrics being proportional in direction and amount to the change
of the color slot resulting from any change in operational setting
angle, color profile levers being operatively associated with the
edge of said color knife, said color profile levers being provided
with first impact surfaces, color zone screws adapted for striking
said first impact surfaces of said color profile levers, said color
profile levers having second impact surfaces, storage bar means
mounted for movement perpendicular to said second impact surfaces
and storage screws for said storage bar, said storage bar being
adapted for movement by said storage screws for striking said
second impact surfaces of said color profile levers.
2. Apparatus according to claim 1, wherein said control dosing
means are arranged abutting a stop firmly mounted in said control
dosing device, said control means comprising a bushing mounted for
rotation in said control dosing device, said bushing including
internal thread means and a knurled collar, spacing bolt means
provided with precision thread means and graduated indicator means
being additionally provided in said bushing, said spacing bolt
means having a flattened portion, wedge means for inhibiting
rotational movement of said spacing bolt being securely mounted for
pressing contact with said flattened portion of said spacing bolt
in said control dosing means.
3. Apparatus according to claim 1, wherein the center of gravity of
said color dosing device is located between said traverse and said
color doctor roller, spring means, means for displaceable movement
in said color dosing means, said spring means being mounted on
spring rod means, insertable wedge means and stop means, said
spring means being adapted for abutting contact with said stop
means via said insertable wedge means.
4. Apparatus according to claim 1, wherein said color dosing means
is pivotally mounted for pivoting of said entire color dosing means
on displaceable rocker arm means means for controlling the
displacement of said rocker arm means operatively associated with
said rocker arm means and being arranged substantially
perpendicular to said rocker arm means.
5. Apparatus according to claim 1, wherein means are provided on
said color dosing device for carrying said color knife, said means
being arranged for lateral movement on means pivotally mounted on a
shaft provided in said color dosing device.
6. Apparatus according to claim 5, wherein said control dosing
means are arranged abutting a stop firmly mounted in said control
dosing device, said control means comprising a bushing mounted for
rotation in said control dosing device, said bushing including
internal thread means and a knurled collar, spacing bolt means
provided with precision thread means and graduated indicator means
being additionally provided in said bushing, said spacing bolt
means having a flattened portion, wedge means for inhibiting
rotational movement of said spacing bolt being securely mounted for
pressing contact with said flattened portion of said spacing bolt
in said control dosing means.
7. Apparatus according to claim 5, wherein the center of gravity of
said color dosing device is located between said traverse and said
color doctor roller, spring means, means for displaceable movement
in said color dosing means, said spring means being mounted on
spring rod means, insertable wedge means and stop means, said
spring means being adapted for abutting contact with said stop
means via said insertable wedge means.
Description
This invention relates to an apparatus for regulating a color
dosing device in relation to a color doctor roller wherein the
positioning of the flexible color knife with respect to the doctor
roller and the color profile setting are brought about through
interconnecting color zone screws and levers.
A color dosing device is known in which the color profile setting
is brought about through zone screws and/or through zone screws and
interconnecting levers operating on the color knife. The setting of
the color slot takes place in that through a bolting of the color
dosing installation about a fulcrum, i.e. through the pivoting
thereby made possible the operational angle can also be
changed.
In order to set the color slot without any appreciable change of
the operational angle, the color knife by means of a color knife
carrying adjustment device without any pivoting is displaced with
respect to the color doctor roller.
In order to set the operational angle, i.e. bring about a change to
a different angular degree, the color dosing device is first tilted
or inclined and thereafter the necessary readjustment of the color
slot is brought about through a displacement of the color
knife.
The disadvantage of the foregoing known construction is that in
operating the same, the free end of the color knife is removed from
the point of application of the color zone screws, respectively the
color profile levers and consequently in the actual printing
operation the color knife is forced away from the color doctor
roller when the printing involves the use of highly concentrated,
viscous colors. As a result a change in the conduction of color by
the color dosing device occurs at varying printing speeds.
The color dosing is generally carried out at relatively low machine
speeds and consequently the printer, that is the machine operator
must adjust, i.e., correct the color dosing to the predetermined
actual printing machine speeds. This has to be done by adjusting
the color profile by means of the color zone screws and also by
adjusting the amount of color for instance by changing in the
conventional manner the hub of the doctor roller to correspond to
the continuous printing speed. As a result, the setting of the
color dosing device is associated with the in connection therewith
and with the fact that the operational layout design of the modern
color printing machine which operate with doctor lifts of up to
90.degree. cannot be utilized. Similarly, the setting possibility
of adjusting the lever strips to their maximal length for forming a
film in the color roller arrangement can also not be utilized.
Lastly, there is the disadvantage associated with the known color
dosing devices in that they have no facilities for storage of the
set color profile. The storage of the set color profile is,
however, advantageous in those instances, for example, in which for
the control of a new cylinder setting it becomes necessary to print
sheets and then the actual production must be completed with the
thusly set color profile.
The object of the invention is to improve the setting of color
dosing devices to achieve a higher quality printing result and at
the same time, to reduce the cost associated with the setting
itself.
It is another object of the invention to provide an arrangement for
setting the color profile, color slot and the operational angle of
a color dosing device under maintenance of the support line between
the color knife and color profile levers and at the same time, to
provide an arrangement for storage of the color profile.
In accordance with the invention, these and other objects are
achieved in that for setting of the color slot, the entire color
dosing installation is pivoted around a fulcrum with maintenance of
the support line between the color knife and the color profile
levers.
For changing the operational angles without changing the color
slot, the complete installation is pivoted about a fulcrum point
and this point, or the part of the color dosing device carrying the
color knife, is shifted a distance corresponding to the change of
the color slot. For setting the color profile the individual color
profile levers which operate the color knife edge are separately
moved and for parallel setting of the color knife -- color profile
storate setting -- all of the color profile levers are jointly
moved.
In accordance with the invention, the entire color dosing device is
pivotally arranged on eccentrics which are movably disposed on a
traverse bar and the eccentricity of which in direction and amount
is proportional to the change of the color slot when the
operational angle is changed.
Furthermore, the color profile levers which act on the color knife
edge are provided with stop faces for color zone screws and with
stop faces for a movable parallel storage bar which is movable in
the color dosing device perpendicular to the stop faces by the
storage screws.
In accordance with another embodiment of the invention, the total
color dosing installation is pivotable on an adjustable rocker arm
and the device for setting the rocker arm is arranged to act in a
direction perpendicular to the rocker arm.
In the embodiment of the invention, hereinafter illustrated in FIG.
6, the part of the color dosing device carrying the color knife is
displaceably positioned on a part of the color dosing device which
in turn is pivotally attached on a shaft.
The color dosing device is provided with a control device abutting
with a stop arranged securely in the stand or support of the
device, said control device consisting of a rotatable bushing
provided in the color dosing device having an inner thread and a
knurled collar in which bushing there is disposed a spacing bolt
having a fine, that is, a precision thread and a graduated
measuring indicator. An angle for preventing the rotational
movement of this spacing bolt is pressed against the flattened part
of the spacing bolt.
In order to create the contact pressure between the control device
of the color dosing device and the stop securely mounted in the
support, the center of gravity of the color dosing device is
located between the traverse bar and the color doctor roller. In
order to increase the contact pressure, a pressure spring is
provided on a movably disposed spring rod contained in the color
dosing device which spring presses over a removable, i.e.,
insertable wedge against a stop securely mounted in the
structure.
The invention will be further illustrated by actual embodiments
thereof described in detail with reference to the drawings in
which:
FIG. 1 is a side elevational view of the color dosing device in
section, showing setting through rotatably arranged eccentrics;
FIG. 2 is a section along line 2--2 of FIG. 1;
FIG. 3 is a setting device in accordance with the invention shown
in section;
FIG. 4 is a schematic representation of principle of the setting of
the color dosing device showing setting via the movable rocker
arm;
FIG. 5 is a schematic representation of the principle for setting
the color dosing device showing setting over an alignable fulcrum
point;
FIG. 6 is a schematic showing of the reverse solution of the
principle as shown in FIG. 5; and
FIG. 7 is a view of the whole of the printing machine in side
elevation.
Each of the setting arrangements, and namely color slot, operating
angle, and color profile setting refer to a changing in the
position of the color knife of the color dosing device 2 with
respect to the color doctor roller 3 under retention of the support
line between the color knife 1 and the color profile levers 4.
In the embodiment shown in FIGS. 1-3, the color dosing device 2 is
rotatably disposed on eccentrics 5 for carrying out the changes in
the color slot and the operational angle. These eccentrics 5 are
interconnected and rotatably disposed on a traverse bar 6. The
interconnected eccentrics 5 are provided with a setting lever 7 and
a setting screw 8 for coupling, that is connecting the eccentrics
with the traverse bar.
In order to set the color slot a, the color dosing device 2 is
pivoted on eccentrics 5 while the eccentrics 5 are connected with
the traverse bar 6. The changes in color slot are made in fractions
of 1 mm so that the resultant change of the operational angle is
negligible.
In order to set the operational angle of the color dosing device,
the eccentrics 5 are locked together with the setting screw 8 on
the traverse bar 6. The change in the operational angle which takes
place with the change of the color slot is compensated for by the
turning of the eccentrics 5 following release of the setting screw
8. The eccentricity e of the eccentrics corresponds in direction
and amount to the change of the color slot which occurs with the
change in the operational angle.
The setting movements required for the color slot change and the
operational angle change are initiated through a control device
which is provided in the color dosing device 2.
The control device consists of a bushing 10 which is mounted for
rotation in the color dosing device 2 which bushing is provided
with an internal thread and a knurled collar 9. The bushing is also
provided with a spacing bolt 11 which in turn is provided with a
precision thread and a graduated measuring indicator. The spacing
bolt 11 has a flat portion 12 against which an angle 13 is pressed,
the latter being firmly secured to the color dosing device 2 so
that any rotation of the spacing bolt 11 is prevented. There is,
thusly provided means whereby a rotation of the bushing 10 results
in a shifting of the spacing bolt 11. The spacing bolt of the
setting device presses against a stop 14 which is securely mounted
in the structure. The point of gravity of the color dosing device
is located between the traverse bar 6 and the color doctor roller 3
and, therefore, the spacing bolt 11 is in every possible situation
pressed against the stop 14. For supporting the contact force, the
color dosing device is provided with a spring 16 which is disposed
on a spring rod 15 which is displaceably mounted in the color
dosing device. This spring 16 presses via a removably insertable
wedge 17 against a stop 18 which is securely arranged in the
structure.
In case the complete color dosing device is to be pivoted, as for
example, as required for cleaning purposes, the spring 16 must be
released by shifting the spring bar 15 and removing the insertable
wedge 17.
The setting of the color profile is carried out through a setting
of the color knife 1 which takes place via color profile levers 4
operating the color knife edge 19. The color profile levers 4 are
mounted for rotation in the color dosing device and have stop faces
20 for the individual color zone screws 21 and also stop faces 22
for a parallel storage bar 23 which is movable perpendicularly to
the stop faces in the color dosing device. The movement of the
parallel storage bar 23 is controlled through storage screws
24.
The operation of the storage device takes place in the following
manner. The color profile required in connection with the
individual printing is set by the color zone screws 21, i.e. the
color profile levers 4 which are arranged one next to the other
over the entire width of the color dosing device exhibit different
positions.
For complying with the technical requirements of printing, for
instance, controlling of the adjustment, the printer frequently is
forced to print individual sheets. In this case, the storage bar 23
is shifted by means of storage screw 24, in other words, all of the
color profile levers are brought into the same position and the
color knife 1 is set parallel by this action. The color zone screws
21 in this case retain their settings. After withdrawing the
storage screws 24, the color profile levers 4 are pressed against
the color zone screws 21 through the resilient nature of the color
knife 1, which means that the color profile levers 4 are pressed in
their original position.
FIGS. 4-6, there are shown in the form of schematic
representations, the principles of different possibilities for
changing the color slot and the operational angle.
In the embodiment of FIG. 4, the entire color dosing device 2 is
pivotable on an adjustable rocker arm 25. The setting of the rocker
arm takes place by means of a setting device 26 which acts on the
arm in a substantially perpendicular direction.
In the embodiment shown in FIG. 5, the entire color dosing device 2
is pivotally disposed on a movable slide 27 (movable from left to
right and vice versa).
In the embodiment shown in FIG. 6, the part 30 of the color dosing
device 2 carrying the color knife 1 is slidably positioned on part
29 which in turn is pivotally attached on a shaft 28.
The operation of the printing device incorporating the teachings of
the invention is shown in FIG. 7. The sheet fed from feeder drum 31
to printing cylinder 32 is printed in the contact zone between
printing cylinder 32 and rubber cylinder 33. Thereafter, the sheet
is passed, via a transfer drum 34, to the next printer or the sheet
is passed via a delivery drum 35 to the exit point. The color to be
transferred to the sheet is contained in a color dosing device 2
and is transferred by means of various color rollers 36 to the
plate cylinder 37 carrying the printing form. According to the
manner of the making up of the printing form, there then takes
place a color transfer onto the rubber cylinder 33. In order that
satisfactory printing results be obtained, it is necessary that the
color dosing device 2 be provided with a number of possibilities
for adjusting the same.
* * * * *