Claims
- 1. A damping system for an offset press comprising:
- a plate cylinder, a water-applicator roller for applying water, means for supplying water to said water-applicator roller, said water-applicator roller being in contact with said plate cylinder;
- a motor driving said water-applicator roller;
- motor speed detecting means for detecting a rotational speed of said motor;
- peripheral speed detecting means for detecting a peripheral speed of said plate cylinder;
- slip input means for setting a desired difference between the peripheral speed of said plate cylinder and a peripheral speed of said water-applicator roller; and
- control means connected to said motor speed detecting means, said peripheral speed detecting means and said slip input means for controlling the rotational speed of said motor with said peripheral speed of said plate cylinder, said rotational speed being modified by said desired difference set by said slip input means.
- 2. A damping system as claimed in claim 1, further comprising:
- clutch means including a clutch engageably connected between said motor and said water-applicator roller, responsive to a control signal, for transmitting a rotational force of said motor to said water-applicator roller when said clutch is in an engaged state;
- range detecting means, responsive to the rotational speed of said motor and said peripheral speed of said plate cylinder, for detecting whether said difference therebetween is within a predetermined range;
- clutch control means, responsive to said range detecting means, for producing said control signal such that said control signal causes said clutch means into said engaged state only when said difference is within said range.
- 3. A damping system as claimed in claim 1, wherein said means for supplying water comprises a water-fountain roller and a motor for driving said water-fountain roller.
Parent Case Info
This application is a continuation of application Ser. No. 248,442 filed Sept. 23, 1988, now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4686901 |
Arndt et al. |
Aug 1987 |
|
Continuations (1)
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Number |
Date |
Country |
Parent |
248442 |
Sep 1988 |
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