US4793041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transfer roll with ceramic-fluorocarbon coating containing cylindrical ink holes with round, beveled entrances
Assignee: Individual
•
Filing: 1987-12-11
•
Granted: 1988-12-27
•
Expires: 2007-12-11
Abstract
Abstract An ink transfer roll composed of a steel base covered by a ceramic-fluorocarbon outer layer into which are formed generally cylindrically shaped ink holes having a hemispherical bottom, a generally cylindrical intermediate portion and a rounded, beveled entryway. The ink holes are produced using a pulsed high energy source, such as a pulsed laser. An intermediate layer of corrosion resistant metal and fluorocarbon may be deposited between the steel base and the outer layer of ceramic-fluorocarbon material. Adhesion of the ceramic-fluorocarbon layer to the transfer roll is improved if corrosion resistant metal-fluorocarbon material is contained in the ceramic-fluorocarbon layer such that the quantity of corrosion resistant metal-fluorocarbon material in the ceramic-fluorocarbon layer gradually decreases in the direction away from the intermediate layer-outer layer interface, the quantity of corrosion resistant metal-fluorocarbon material in said outer layer being greatest at said interface.
Inventors
- 👤 Jerome D. Jenkins
- 👤 Neal G. Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:22
CPC Classifications
B; B41; B41F; B41F31/00; B41F31/26; B41N; B41N7/00; B41N7/06; C; C23; C23C; C23C4/00; C23C4/18; B41N2207/00; B41N2207/02; B41N2207/10
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
94 words
A transfer roll for transferring ink or like mediums from ink holes formed therein to a print roll or material comprising: (a) a metal substrate; and (b) an outer coating of a ceramic-fluorocarbon mixture covering said substrate, said ceramic-fluorocarbon mixture coating containing a fluorocarbon homogeneously dispersed throughout the entire thickness of the outer coating, thereby lowering the dyne level to greatly enhance ink transfer from the transfer roll to the print roll by providing a precise distribution of ink to the print roll and improving the durability, and corrosion resistance of the transfer roll.
Claim 2
Dependent Claim
94 words
A transfer roll for transferring ink or like mediums from ink holes formed therein to a print roll or material comprising: (a) a metal substrate; and (b) an outer coating of a ceramic-fluorocarbon mixture covering said substrate, said ceramic-fluorocarbon mixture coating containing a fluorocarbon homogeneously dispersed throughout the entire thickness of the outer coating, thereby lowering the dyne level to greatly enhance ink transfer from the transfer roll to the print roll by providing a precise distribution of ink to the print roll and improving the durability, and corrosion resistance of the transfer roll.
Claim 3
Dependent Claim
68 words
The transfer roll of claim 1 further comprising an intermediate layer of corrosion resistant metal-fluorocarbon mixture in which the fluorocarbon is homogenously mixed with the corrosion resistant metal coating said metal substrate, said outer ceramic-fluorocarbon mixture coating overlying said corrosion resistant metal-fluorocarbon mixture coating, whereby said intermediate layer of corrosion resistant metal homogeneously mixed with a fluorocarbon improves the bonding of the ceramic-fluorocarbon mixture to said metal substrate.
Claim 4
Dependent Claim
25 words
The transfer roll of claim 2 wherein at least a portion of said outer coating of ceramic-fluorocarbon mixture material also includes said corrosion resistant metal.
Claim 5
Dependent Claim
48 words
The transfer roll of claim 3 wherein the quantity of corrosion resistant metal in said outer coating gradually decreases in a direction away from the interface between said intermediate layer and outer coating, the quantity of corrosion resistant metal in said outer layer being greatest at said interface.
Claim 6
Dependent Claim
20 words
The transfer roll of claim 4 further including a sealing material impregnated within the voids of said ceramic-fluorocarbon mixture coating.
Claim 7
Dependent Claim
35 words
The transfer roll of claim 5 wherein said metal base is steel and the corrosion resistant metal material of said intermediate layer is selected from a group consisting of stainless steel, nickel, titanium and aluminum-titanium.
Claim 8
Dependent Claim
32 words
The transfer roll of claim 6 wherein the ceramic of said ceramic-fluorocarbon mixture coating is selected from a group consisting of aluminum oxide, titanium oxide, chromium oxide, nickel oxide, and manganese oxide.
Claim 9
Dependent Claim
28 words
The transfer roll of claim 6 wherein the ceramic of said ceramic-fluorocarbon mixture coating is slected from a group consisting of tungsten carbide, chromium carbide and boron carbide.
Claim 10
Dependent Claim
14 words
The transfer roll of claims 7 or 8 wherein said sealing material is polytetrafluoroethylene.
Claim 11
Dependent Claim
148 words
A transfer roll for transferring ink or like mediums from ink holes formed therein to a print roll or material comprising: (a) a metal substrate; (b) an outer coating of a ceramic-fluorocarbon mixture covering said substrate, said ceramic-fluorocarbon mixture coating containing a fluorocarbon polymer homogeneously dispersed throughout the entire thickness of the outer coating, thereby lowering the dyne level to greatly enhance ink transfer from the transfer roll to the print hole by providing a precise distribution of ink to the print roll and improving the durability, and corrosion resistance of the transfer roll; and (c) micron-sized pulsed laser beam ink holes formed radially in the outer surface of said outer coating, each of said ink holes having a hemispherical bottom, a generally cylindrical intermediate portion and a rounded, beveled entryway, the thickness of the ceramic-fluorocarbon mixture coating being substantially greater than the depth of the ink holes.
Claim 12
Dependent Claim
148 words
A transfer roll for transferring ink or like mediums from ink holes formed therein to a print roll or material comprising: (a) a metal substrate; (b) an outer coating of a ceramic-fluorocarbon mixture covering said substrate, said ceramic-fluorocarbon mixture coating containing a fluorocarbon polymer homogeneously dispersed throughout the entire thickness of the outer coating, thereby lowering the dyne level to greatly enhance ink transfer from the transfer roll to the print hole by providing a precise distribution of ink to the print roll and improving the durability, and corrosion resistance of the transfer roll; and (c) micron-sized pulsed laser beam ink holes formed radially in the outer surface of said outer coating, each of said ink holes having a hemispherical bottom, a generally cylindrical intermediate portion and a rounded, beveled entryway, the thickness of the ceramic-fluorocarbon mixture coating being substantially greater than the depth of the ink holes.
Claim 13
Dependent Claim
23 words
The transfer roll of claim 10 wherein said generally cylindrical ink holes are non-uniformly spaced about the periphery of said ceramic-fluorocarbon mixture coating.
Claim 14
Dependent Claim
43 words
The transfer roll of claim 11 wherein the spacing between ink holes along a line about the circumference of the transfer roll varies and wherein the relative phase of ink holes on adjacent lines about the circumference of said transfer roll also varies.
Claim 15
Dependent Claim
128 words
A transfer roll for transferring ink or like medium from ink holes formed therein to a print roll or material comprising: (a) a metal base cylinder, (b) said cylinder having a ceramic-fluorocarbon mixture coating about the periphery thereof with a fluorocarbon polymer dispersed homogeneously throughout the entire thickness of the coating, thereby lowering the dyne level to greatly enhance ink transfer from the transfer roll to the print roll by providing a precise distribution of ink to the print roll and improving the durability and corrosion resistance of the transfer roll; and (c) a plurality of pulsed laser drilled, micron-sized ink holes radially formed in the outer coating, each of said ink holes having a hemispherical bottom, a generally cylindrical intermediate portion and a rounded, beveled entry way.
Claim 16
Dependent Claim
128 words
A transfer roll for transferring ink or like medium from ink holes formed therein to a print roll or material comprising: (a) a metal base cylinder, (b) said cylinder having a ceramic-fluorocarbon mixture coating about the periphery thereof with a fluorocarbon polymer dispersed homogeneously throughout the entire thickness of the coating, thereby lowering the dyne level to greatly enhance ink transfer from the transfer roll to the print roll by providing a precise distribution of ink to the print roll and improving the durability and corrosion resistance of the transfer roll; and (c) a plurality of pulsed laser drilled, micron-sized ink holes radially formed in the outer coating, each of said ink holes having a hemispherical bottom, a generally cylindrical intermediate portion and a rounded, beveled entry way.
Claim 17
Dependent Claim
23 words
The transfer roll of claim 13 wherein said generally cylindrical ink holes are non-uniformly spaced about the periphery of said ceramic-fluorocarbon mixture coating.
Claim 18
Dependent Claim
44 words
The transfer roll of claim 14 wherein the spacing between ink holes along a line about the circumference of the transfer roll varies and wherein the relative phase of the ink holes on adjacent lines about the circumference of said transfer roll also varies.
References Cited (Backward Citations)
US3177558A
Cited
US3655426A
Cited
US3613578A
Cited
CA1009507A
Cited
US3942230A
Cited
US4101686A
Cited
US4264181A
Cited
US4272179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-12-27 | 1992-06-27 | 1992-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-27 | 1996-06-27 | 1996-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-27 | 2000-06-27 | 2000-12-27 | $7700.00 | Window Closed / Lapsed |