Claims
- 1. Dampening-unit roller for a dampening unit of a printing machine, the roller comprising a roller body having an outer cylindrical surface, and a coating on said outer cylindrical surface, said coating consisting of zirconium dioxide and a stabilizer for said coating selected from the group consisting of CaO, CeO.sub.2, MgO, HfO.sub.2, CaF.sub.2, and Y.sub.2 O.sub.3.
- 2. Dampening-unit roller according to claim 1, wherein said coating consists of a zirconium dioxide fraction and said stabilizer is an yttrium oxide fraction, wherein the zirconium dioxide fraction is greater than the yttrium oxide fraction.
- 3. Dampening-unit roller according to claim 2, wherein said coating consists of approximately 80 percent by weight of zirconium dioxide and approximately 20 percent by weight of yttrium oxide.
- 4. Dampening-unit roller according to claim 2, wherein said coating consists of approximately 90 to 95 percent by weight of zirconium dioxide and approximately 10 to 5 percent by weight of yttrium oxide.
- 5. Dampening-unit roller according to claim 1, wherein said coating has a surface roughness R.sub.z smaller than 5 .mu.m.
- 6. Dampening-unit roller according to claim 5, wherein the surface roughness is smaller than 1 .mu.m.
- 7. Dampening unit roller according to claim 1, wherein said roller body is formed of metal or plastic material.
- 8. Dampening unit roller according to claim 7, wherein said roller body formed of plastic material is reinforced by fibers.
- 9. Dampening-unit roller for a dampening unit of a printing machine, the roller comprising a roller body having an outer cylindrical surface, and a coating on said outer cylindrical surface consisting of ZrSiO.sub.4.
- 10. In a method of producing a dampening-unit roller for a dampening unit of a printing machine, wherein the roller has a roller body with an outer cylindrical surface and a coating is applied on the outer cylindrical surface, the improved method which comprises forming a coating consisting of zirconium dioxide and a stabilizer stabilizing said coating.
- 11. The method according to claim 10, which further comprises forming the coating as a layer formed by thermal spraying.
- 12. The method according to claim 10, which further comprises forming the coating as a layer formed by plasma spraying or flame spraying.
- 13. The method according to claim 10, which further comprises forming the coating as a layer formed by a process selected from the group consisting of physical vapor deposition, chemical vapor deposition, plasma chemical vapor deposition, sintering, hot isostatic pressing, galvanizing, electron beam physical vapor deposition, diffusion, and laser-caused melting.
- 14. The method according to claim 10, which further comprises forming the coating as a sintered layer.
- 15. The method according to claim 10, which further comprises forming the coating as a galvanically formed layer.
- 16. The method according to claim 10, which further comprises forming the coating as a layer of enamel to which the zirconium dioxide has been added.
- 17. The method according to claim 10, which further comprises forming the coating as an explosively plated layer.
- 18. Dampening-unit roller for a dampening unit of a printing machine, the roller comprising a roller body having an outer cylindrical surface, and a coating on said outer cylindrical surface, said coating consisting of an oxide of zirconium and a stabilizer stabilizing said coating.
- 19. The dampening-unit roller according to claim 18, wherein said stabilizer is selected from the group consisting of CaO, CeO.sub.2, MgO, HfO.sub.2, CaF.sub.2 and an oxide of yttrium.
- 20. The dampening-unit roller according to claim 19, wherein said stabilizer is Y.sub.2 O.sub.3.
Priority Claims (2)
Number |
Date |
Country |
Kind |
42 22 515 |
Jul 1992 |
DEX |
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43 21 183 |
Jun 1993 |
DEX |
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Parent Case Info
This application is a continuation of application Ser. No. 08/518,574, filed on Aug. 23, 1995, now abandoned, which was a continuation of application Ser. No. 08/089,802, filed Jul. 9, 1993, now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (4)
Number |
Date |
Country |
0412219 |
Feb 1991 |
EPX |
60248397 |
Dec 1985 |
JPX |
3297647 |
Dec 1991 |
JPX |
1524323 |
Jan 1976 |
GBX |
Non-Patent Literature Citations (3)
Entry |
"Thermal Barrier coating for Jet Engine Improvement", Johner et al., Thin Solid Films, 1984, pp. 301-315. |
"Experimental and Theoretical Aspects of Thick . . . ", Johner et al., NTSC '87:Thermal Spray, pp. 155-166. |
"Flame rig testing of thermal barrier coatings and . . . " Johner et al., J. Vc.Sci.Tech. 1985, pp. 2516-2524. |
Continuations (2)
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Number |
Date |
Country |
Parent |
518574 |
Aug 1995 |
|
Parent |
089802 |
Jul 1993 |
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