Claims
- 1. For use with a printing apparatus that includes at least one ink fountain for dispensing ink to an associated printing roller and an inking blade positioned adjacent to the printing roller such that a gap exists between the inking blade and the roller, the inking blade having a plurality of adjusting keys associated therewith for adjusting the gap at discrete locations along the length of the inking blade such that the printing apparatus imprints a resultant print having a plurality of printing zones, an ink control system comprising:
- (a) a plurality of servo modules connected to the plurality of adjusting keys in 1:1 correspondence such that each servo module actuates its corresponding adjusting key;
- (b) an operator console including a plurality of input switches for generating a plurality of ink intensity commands wherein each ink intensity command relates to the intensity of ink to be applied to the resultant print within an associated printing zone, the plurality of ink intensity commands being equal in number to the plurality of printing zones; and
- (c) a system control unit which receives the ink intensity commands from the operator console and which includes means for interpolating between the plurality of servo modules and the plurality of ink intensity commands to generate interpolated servo signals to the servo modules for driving the servo modules to interpolated activation of the adjusting keys such that the ink intensity in each of the printing zones of the resultant print corresponds to the ink intensity command selected on its associated input switch.
- 2. An ink control system as claimed in claim 1 wherein the plurality of input switches is unequal to the plurality of servo modules.
- 3. For use with a printing apparatus that includes at least one ink fountain for dispensing ink to an associated printing roller and an inking blade positioned adjacent to the printing roller such that a gap exists between the inking blade and the roller, the inking blade having a plurality of adjusting keys associated therewith for adjusting the gap at discrete locations along the length of the inking blade such that the printing apparatus imprints a resultant print having a plurality of printing zones, an ink control system comprising:
- (a) a plurality of servo modules connected to the adjusting keys in 1:1 correspondence such that each servo module activates its corresponding adjusting key;
- (b) an operator console for providing ink intensity command values for controlling the operation of the servo modules;
- (c) a servo power unit responsive to the ink intensity command values received from the operator console to provide signals to the servo modules for adjusting individual adjusting keys an amount corresponding to the corresponding ink intensity command value;
- (d) means for monitoring the adjustment of the adjusting keys to determine whether the individual adjusting keys have been adjusted the amount corresponding to the corresponding ink intensity command value; and
- (e) means for recording the difference between the amount of actual adjustment by individual adjusting keys and the amount corresponding to the corresponding ink intensity command value after each adjustment thereof and for providing update signals to the servo modules such that the differences are compensated for on subsequent adjustments.
- 4. For use with a printing apparatus that includes at least one ink fountain for dispensing ink to an associated printing roller and an inking blade positioned adjacent to the printing roller such that a gap exists between the inking blade and the roller, the inking blade having a plurality of adjusting keys associated therewith for adjusting the gap at discrete locations along the length of the inking blade such that the printing apparatus imprints a resultant print having a plurality of printing zones, an ink control system connected to the adjusting keys for controlling the adjustment of the adjusting keys, the ink control system comprising:
- (a) a system unit for controlling the operation of the ink control system;
- (b) an operator console for providing ink intensity commands to the system unit for controlling the adjustment of the adjusting keys;
- (c) a plurality of servo modules connected to the adjusting keys in 1:1 correspondence such that each servo module actuates a corresponding adjusting key, the servo modules being grouped into a plurality of servo module banks, each of the servo module banks including at least one servo module;
- (d) a servo power unit for controlling the adjustment of the adjusting keys, the servo power unit comprising:
- (i) means for generating a servo select signal for selecting one of the servo module banks for transmission of control signals thereto; and
- (ii) means for receiving the servo select signal and for transmitting a configuration signal to the selected servo module bank whereby the configuration signal assigns a unique identifier to each of the servo modules within the selected servo module bank; and
- (e) means for generating the configuration signal.
- 5. For use with a printing apparatus that includes at least one ink fountain for dispensing ink to an associated printing roller and an inking blade positioned adjacent to the printing roller such that a gap exists between the inking blade and the roller, the inking blade having a plurality of adjusting keys associated therewith for adjusting the gap at discrete locations along the length of the inking blade such that the printing apparatus imprints a resultant print having a plurality of printing zones, an ink control system connected to the adjusting keys for controlling the adjustment of the adjusting keys, the ink control system comprising:
- (a) system control means responsive to ink intensity commands for controlling the adjusting of the adjusting keys;
- (b) a plurality of servo modules connected to the adjusting keys in 1:1 correspondence such that each servo module actuates a corresponding adjusting key, the servo modules being grouped into a plurality of servo module banks, each of the servo module banks including at least one servo module;
- (c) servo control means for controlling the adjustment of the adjusting keys, the servo control means comprising:
- (i) means for generating a servo select signal for selecting one of the servo module banks for transmission of control signals thereto; and
- (ii) means for receiving the servo select signal and for transmitting a configuration signal to the selected servo module bank whereby the configuration signal assigns a unique identifier to each of the servo modules within the selected servo module bank; and
- (d) means for generating the configuration signal.
DISCLOSURE OF THE INVENTION
This is a continuation of co-pending application Ser. No. 371,996 filed on 6/27/89, now abandoned, which is a divisional of application Ser. No. 098,745, filed Sept. 16,1987 (now U.S. Pat. No. 4,864,930), which is a continuation of parent application Ser. No. 733,208, filed May 9, 1985, now abandoned.
1. Technical Field
This invention relates to printing apparatus, and more particularly, to ink control systems.
2. Background Art
Printing apparatus are common in the art. Printing apparatus generally comprises a plurality of printing rollers, at least one ink fountain, and at least one inking blade that is positioned adjacent to one of the inking rollers. The inking blade is a generally longitudinally extending member the longitudinal length of which being generally parallel with the axis of the inking roller. One edge of the inking blade is positioned adjacent to, but not continguous with, the inking roller such that a gap is formed between the inking blade edge and the inking roller. The distance of the gap is varied by adjusting the position of the inking blade in relation to the inking roller. The distance between the inking blade and the inking roller is proportional to the amount of ink that may be adhered to the inking roller, which in turn determines the intensity of the ink that is printed on a medium, generally paper.
Since the intensity of the ink may not be uniform across a single piece of print, the distance of the gap between the inking blade and the inking roller needs to, necessarily, be different at different locations along the entire length of the inking roller. The adjustment of the gap at each discrete location is generally performed by manually-operated adjusting devices which are mounted on the inking blade. Each of these adjusting devices varies the intensity of the ink on a segment of the resultant print, generally referred to as a zone. The adjusting devices in the prior art are generally referred to as keys. Examples of such prior art printing apparatus and ink adjusting devices are illustrated in Crum, U.S. Pat. No. 3,747,524; Murray, et al., U.S. Pat. No. 3,958,509; Crum et al., U.S. Pat. No. 4,008,664; and Schramm, U.S. Pat. No. 4,328,748.
In view of the prior art, it is a major object of the present invention to provide an ink control system that is capable of being readily retrofitted onto any existing printing apparatus, especially the capability to be retrofittable irrespective of the proportionality between the number of keys and the number of zones.
It is another object of the present invention to provide an ink control system that utilizes simple and rapid communications techniques, especially the use of buses to communicate with the adjusting devices.
It is a further object of the present invention to provide an ink control system that does not require the alteration of an existing printing apparatus.
It is another object of the present invention to provide an ink control system that utilizes simple feedback techniques to sense the movement of the adjusting keys.
It is a still further object of the present invention to provide an ink control system that is capable of storing and recalling a job.
It is another object of the present invention to provide an ink control system that is capable of preventing damages to the printing apparatus.
It is a still further object of the present invention to provide an ink control system that is modularly expandable or contractable in order to match the dimension of an existing printing apparatus.
It is another object of the present invention to provide an ink control system that is easy to install and remove from an existing printing apparatus.
In order to accomplish the above and still further objects, the present invention provides an ink control system for use with a printing apparatus that has a plurality of printing rollers, at least one ink fountain, and at least one inking blade that is positioned adjacent one of the inking rollers, the inking blade having a plurality of adjusting keys thereon. The ink control system for controlling the adjustment the adjusting keys comprises a system unit for controlling the overall operation of the ink control system, an operator console for inputting commands which control the adjustment of the adjusting keys, a servo power unit for controlling the adjustment of the adjusting keys, and a plurality of servo modules each of which performs the adjustment of one of the adjusting keys by actuating the one adjusting key.
Other objects, features, and advantages of the present invention will appear from the following detailed description of the best mode of a preferred embodiment, taken together with the accompanying drawings.
US Referenced Citations (52)
Foreign Referenced Citations (5)
| Number |
Date |
Country |
| 0113905 |
Jul 1984 |
EPX |
| 3220360 |
Dec 1983 |
DEX |
| 3220803 |
Dec 1983 |
DEX |
| WO8304219 |
Dec 1983 |
WOX |
| 2024457 |
Jan 1980 |
GBX |
Divisions (1)
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Number |
Date |
Country |
| Parent |
98745 |
Sep 1987 |
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Continuations (2)
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Number |
Date |
Country |
| Parent |
371996 |
Jun 1989 |
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| Parent |
733208 |
May 1985 |
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Patent Grant
5052298
