WO1993019939B1 - Printing method and apparatus - Google Patents
Printing method and apparatusInfo
- Publication number
- WO1993019939B1 WO1993019939B1 PCT/US1993/002788 US9302788W WO9319939B1 WO 1993019939 B1 WO1993019939 B1 WO 1993019939B1 US 9302788 W US9302788 W US 9302788W WO 9319939 B1 WO9319939 B1 WO 9319939B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- solution
- electromagnetic radiation
- printing
- further characterized
- original
- Prior art date
Links
Abstract
The present invention relates to a method and apparatus for printing in which the fountain solution (37) for a lithographic printing device is treated by the direct injection of electromagnetic radiation. Most preferably, the electromagnetic radiation is within the radio frequency range and is injected through a conductor (30) directly in contact with the fountain solution (37). Such treatment eliminates or substantially reduces the need for chemical treatment of the fountain solution (37), especially the need for isopropyl alcohol or alcohol substitutes.
Claims
1. A printing apparatus of the type including a printing surface, a portion of which is to be rendered ink receptive and a portion of which is to be rendered ink repellant, and wherein an aqueous solution (37) is used for the treatment of the ink receptive area, characterized by: an injection system for injecting electromagnetic radiation into the solution (37) , said injection system including a generator (25) for generating electromagnetic radiation at a preselected frequency and an injector (30) in direct contact with the solution (37) , the generator and injector being coupled by a cable (32) .
2. The apparatus of Claim 1, further characterized in that the solution (37) is contained in a tank (35) and the injector (30) includes a conductor in contact with the solution (37) within the tank (35) .
3. The apparatus of Claim 2, further characterized in that the solution (37) is a fountain solution.
4. The apparatus of Claim 2, further characterized in that the electromagnetic radiation is generated within the range of 1 KHz to 1,000 MHz.
5. The apparatus of Claim 1, further characterized in that the length of the cable (32) is selected depending upon the radiation frequency.
6. The apparatus of Claim 1, further characterized in that the surface is a printing cylinder (46) and wherein the solution (37) is applied to the cylinder from a roller pan (42) .
7. A method for printing an image on a surface using a printing unit, wherein a portion of the surface is rendered ink receptive and another portion of the surface is rendered ink repellant, comprising the steps of: applying an aqueous solution (37) to the area to be rendered ink receptive and applying an ink to the ink-receptive areas; and treating the solution by injecting therein electromagnetic radiation from a signal generator (25) capable of generating electromagnetic radiation through a cable (32) into a conductor in direct contact with the solution (37) .
8. The method of Claim 7, further characterized in that the electromagnetic radiation has a frequency in the range of 1 KHz to 1,000 MHz.
9. The method of Claim 7, further characterized in that the surface is a printing plate and wherein the solution (37) is a fountain solution applied to the plate by a roller, and wherein the treating step comprises treating the liquid in a reservoir (35) and conveying the treated liquid to a roller pan (42) .
10. A system for eliminating alcohol-type additives in fountain solutions in lithographic printing operations, comprising: providing a printing plate, a fountain solution (37) and a roller system for applying the solution to the plate having no alcohol added thereto; injecting into the solution electromagnetic radiation from a generator (25) capable of generating electromagnetic radiation through a cable (32) and to an injector (30) in contact with the solution (37) ; and means (39, 40, 42) for conveying the treated solution to the roller system. - 24 -
STATEMENT UNDER ARTICLE19
Pursuant to Article 19(1) and Rule 46.1, Applicant hereby amends the claims of the above-captioned application and files the following statement in connection with the amendment.
Attached hereto are replacement pages 20-21 for the application. Original claims 1-10 have been changed, and original claim 11 has been deleted.
The amendments to the original claims primarily place the claims into better format for prosecution. In addition, the original language of claim 10 has largely been replaced with the language of original claim 11.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP93908569A EP0632763A4 (en) | 1992-03-27 | 1993-03-25 | Printing method and apparatus. |
| JP51754993A JP3352459B2 (en) | 1992-03-27 | 1993-03-25 | Printing method and apparatus |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US86000292A | 1992-03-27 | 1992-03-27 | |
| US07/860,002 | 1992-03-27 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| WO1993019939A2 WO1993019939A2 (en) | 1993-10-14 |
| WO1993019939A3 WO1993019939A3 (en) | 1993-11-11 |
| WO1993019939B1 true WO1993019939B1 (en) | 1994-01-06 |
Family
ID=25332280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1993/002788 WO1993019939A2 (en) | 1992-03-27 | 1993-03-25 | Printing method and apparatus |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0632763A4 (en) |
| JP (1) | JP3352459B2 (en) |
| CA (1) | CA2132625A1 (en) |
| WO (1) | WO1993019939A2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2305094A (en) * | 1995-08-25 | 1997-03-26 | Steven Lionel Kennett | Treatment of solutions in a printing process |
| JP4400792B2 (en) * | 2005-04-11 | 2010-01-20 | エスティエンジニアリング株式会社 | Dampening water circulation treatment device and dampening water circulation treatment method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4527479A (en) * | 1981-07-31 | 1985-07-09 | Dahlgren Harold P | Ink removal, circulating and distributing system |
| US4548645A (en) * | 1983-12-21 | 1985-10-22 | Inmont Corporation | Lithographic water based fountain solution concentrates |
| DD238945A1 (en) * | 1985-07-04 | 1986-09-10 | Polygraph Leipzig | DEVICE FOR PREPARING WETTING AGENT AT OFFSET PRINTING MACHINES |
| US4888113A (en) * | 1986-11-21 | 1989-12-19 | Holcomb Robert R | Magnetic water treatment device |
| US4865748A (en) * | 1988-04-20 | 1989-09-12 | Aqua-D Corp. | Method and system for variable frequency electromagnetic water treatment |
-
1993
- 1993-03-25 WO PCT/US1993/002788 patent/WO1993019939A2/en not_active Application Discontinuation
- 1993-03-25 EP EP93908569A patent/EP0632763A4/en not_active Withdrawn
- 1993-03-25 CA CA 2132625 patent/CA2132625A1/en not_active Abandoned
- 1993-03-25 JP JP51754993A patent/JP3352459B2/en not_active Expired - Fee Related
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