Claims
- 1. A process for indirect rotogravure printing, consisting essentially of the steps of: providing a rotogravure form cylinder; placing a transfer cylinder against an impression cylinder; adjusting a chambered doctor blade toward the rotogravure form cylinder and inking a printing form on the form cylinder using the chambered doctor blade with an ink having a viscosity in a range of 80 to 1000 mPa s; lifting the ink out of pits in the printing form using a covering of the transfer cylinder, which cover has a closed surface, a surface roughness R.sub.z .ltoreq.6 .mu.m and low wettability, by placing the transfer cylinder in rolling contact with the rotogravure form cylinder; and transferring all the ink by re-adhesion to printing stock as the printing stock passes between the transfer cylinder and the impression cylinder, due to the closed surface, surface roughness and low wettability of the covering.
- 2. A process according to claim 1, including supplying a water-solvent ink to the rotogravure form cylinder using the chambered doctor blade.
- 3. A process according to claim 1, including supplying a radiation-curable ink to the rotogravure form cylinder using the chambered doctor blade.
- 4. A process according to claim 1, including supplying an offset printing ink to the rotogravure form cylinder using the chambered doctor blade.
- 5. A rotary printing machine for indirect rotogravure printing, comprising: a rotogravure form cylinder; a printing form with a print image arranged and adapted to cover the form cylinder; a chambered doctor blade arranged and adapted to be adjustable against the rotogravure form cylinder to ink the printing form with an ink having a viscosity in a range of 80 to 1000 mPa s a transfer cylinder having a resilient surface, the transfer cylinder being arranged adjacent to the form cylinder and adapted to accept the print image from the rotogravure form cylinder, the rotogravure form cylinder and the transfer cylinder having journals and an equal circumference; an impression cylinder adjacent the transfer cylinder; spur gears provided on the journals of the form cylinder and the transfer cylinder whereby the form cylinder and transfer cylinder are in drive connection; eccentric bushes arranged on the journals of the transfer cylinder whereby the transfer cylinder can be adjusted toward and away from the adjacent cylinders; sidewalls which the journals of the cylinders are supported; a covering provided on the transfer cylinder, the covering having a closed surface, a surface roughness R.sub.z .ltoreq.6 .mu.m, low wettability and a radial rebound resiliency greater than 95%; and means for feeding ink to the chambered doctor blade, the ink feeding means including an ink reservoir, an ink pump connected between the ink reservoir and the chambered doctor blade, and an ink return connected between the chambered doctor blade and the ink reservoir.
- 6. A rotary printing machine according to claim 5, wherein the covering of the transfer cylinder is made of a fully cross-linked aliphatic polyurethane.
- 7. A rotary printing machine according to claim 5, wherein the covering of the transfer cylinder is made of silicone.
- 8. A rotary printing machine according to claim 5, wherein the transfer cylinder has a cylindrical body, one of the sidewalls having an opening therein, and further comprising a substrate sleeve removably mounted on the cylindrical body of the transfer cylinder whereby the sleeve can be pushed out of the printing machine axially from the cylindrical body through the opening in the sidewall, the covering of the transfer cylinder being fastened to the substrate sleeve.
- 9. A rotary printing machine according to claim 5, wherein one of the sidewalls has an opening therein, the rotogravure form cylinder having a cylindrical body and the printing form being a sleeve removably mounted on the cylindrical body of the rotogravure form cylinder whereby the printing form can be pushed out of the printing machine axially from the cylindrical body through the opening in the sidewall.
- 10. A rotary printing machine according to claim 5, wherein the impression cylinder is a further transfer cylinder of another printing mechanism, and further comprising a further rotogravure form cylinder with a further chambered doctor blade arranged at the further transfer cylinder.
Priority Claims (1)
Number |
Date |
Country |
Kind |
44 01 362.0 |
Jan 1994 |
DEX |
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Parent Case Info
This is a continuation of application Ser. No. 08/374,030, filed Jan. 18, 1995 now abandoned.
US Referenced Citations (13)
Foreign Referenced Citations (7)
Number |
Date |
Country |
0 294 022 A1 |
Dec 1988 |
EPX |
0 565 416 A1 |
Oct 1993 |
EPX |
1410832 |
Aug 1965 |
FRX |
1531614 |
Jul 1968 |
FRX |
296512 |
Feb 1917 |
DEX |
3843017 |
May 1990 |
DEX |
3908999 |
Sep 1990 |
DEX |
Non-Patent Literature Citations (1)
Entry |
"Ink-Report, Zusammensetzung, Herstellung und Anwendung von Druckfarben", Druckfarbenfabrik Gebr. Schmidt GmbH (1993), p. 39. |
Continuations (1)
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Number |
Date |
Country |
Parent |
374030 |
Jan 1995 |
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