JPS5718255A - Controller for amount of wetting water in lithographic printer - Google Patents
Controller for amount of wetting water in lithographic printerInfo
- Publication number
- JPS5718255A JPS5718255A JP9223880A JP9223880A JPS5718255A JP S5718255 A JPS5718255 A JP S5718255A JP 9223880 A JP9223880 A JP 9223880A JP 9223880 A JP9223880 A JP 9223880A JP S5718255 A JPS5718255 A JP S5718255A
- Authority
- JP
- Japan
- Prior art keywords
- water
- amount
- roller
- wetting
- retaining layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract 10
- 238000009736 wetting Methods 0.000 title abstract 7
- 229920001971 elastomer Polymers 0.000 abstract 3
- 239000005060 rubber Substances 0.000 abstract 3
- 230000000717 retained effect Effects 0.000 abstract 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract 1
Abstract
PURPOSE: To easily control the amount of wetting water and to make the quality of a printed matter uniform, by controlling the amount of the wetting water on the basis of the electric resistance value of a water-retaining layer on a water-feed roller provided with the water-retaining layer on its surface.
CONSTITUTION: Among a water-source roller 1, a water-transferring roller 2, a water-squeezing roller 3 acting as a wetting water leveler and a water-applying roller 4 to feed wetting water to a printing surface 6, the retained water amount in the water-transferring roller 2 or the water-applying roller 4, whose surface is covered with a water-retaining layer, is proportional to the amount of the wetting water to be applied to the printring surface 6. The both ends of an insulating rubber roller 7 inside the water-retaining layer 5 of one of these rollers are stripped, and electric conductive rubbers 8 are attached instead. A lead wire 9 and an electrode 10 are connected to each electric conductive rubber 8. A resistance value between the two electrodes 10 is measured, and the rotation speed of the water-source roller 1 is changed so as to keep the wetting water amount at the most suitable level, using the phenomenon that the resistance value is in inverse proportion to the retained water amount. Thus, the water feed amount is controlled.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9223880A JPS5718255A (en) | 1980-07-08 | 1980-07-08 | Controller for amount of wetting water in lithographic printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9223880A JPS5718255A (en) | 1980-07-08 | 1980-07-08 | Controller for amount of wetting water in lithographic printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5718255A true JPS5718255A (en) | 1982-01-30 |
Family
ID=14048850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9223880A Pending JPS5718255A (en) | 1980-07-08 | 1980-07-08 | Controller for amount of wetting water in lithographic printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5718255A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0736383A1 (en) | 1995-04-03 | 1996-10-09 | Tokyo Kikai Seisakusho Ltd. | Dampening systems in offset printers |
| US6778206B2 (en) * | 2000-01-12 | 2004-08-17 | Fuji Photo Film Co., Ltd. | Recording apparatus |
-
1980
- 1980-07-08 JP JP9223880A patent/JPS5718255A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0736383A1 (en) | 1995-04-03 | 1996-10-09 | Tokyo Kikai Seisakusho Ltd. | Dampening systems in offset printers |
| US5644981A (en) * | 1995-04-03 | 1997-07-08 | Tokyo Kikai Seisakusho, Ltd. | Abnormality detector for nozzle type dampening systems |
| US6778206B2 (en) * | 2000-01-12 | 2004-08-17 | Fuji Photo Film Co., Ltd. | Recording apparatus |
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