US4384945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of rotary screen printing cylinders and other fine-apertured sheet materials
Assignee: Schablonentechnik Kufstein GmbH
•
Filing: 1979-09-21
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Granted: 1983-05-24
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Expires: 1999-09-21
Abstract
Abstract A method of producing a rotary screen printing cylinder or other fine-apertured sheet material which comprises electro-deposition of a plastic material onto an electrically conductive fine-apertured cylinder or other sheet substrate. When applied to wire mesh cylinders, the method is a fast and effective way of reducing the aperture size. The method can also be operated so that plastic is deposited on one side only of the substrate to increase the substrate strength with little or no aperture size reduction.
Inventors
- 👤 Wallace W. Sword
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:27
CPC Classifications
B; B41; B41C; B41C1/00; B41C1/14
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
89 words
A method of coating a rotary screen printing cylinder with a plastic material, said cylinder being electrically conductive and having apertures in its surface of a size ranging from 35 to 500 μm, which method comprises engraving the cylinder photographically with a film of the design to be printed to produce engraved areas and non-engraved areas on the cylinder, electrodepositing the plastic material uniformally over at least one surface of the cylinder to strengthen the cylinder and to close the apertures completely in the non-engraved areas of the cylinder.
Claim 2
Independent Claim
89 words
A method of coating a rotary screen printing cylinder with a plastic material, said cylinder being electrically conductive and having apertures in its surface of a size ranging from 35 to 500 μm, which method comprises engraving the cylinder photographically with a film of the design to be printed to produce engraved areas and non-engraved areas on the cylinder, electrodepositing the plastic material uniformally over at least one surface of the cylinder to strengthen the cylinder and to close the apertures completely in the non-engraved areas of the cylinder.
Claim 3
Independent Claim
62 words
A method of coating a rotary screen printing cylinder with a plastic material, said cylinder being electrically conductive and having apertures in its surface of a size ranging from 35 to 500 μm, which method comprises the electrodeposition of the plastic material uniformally over at least one surface of the cylinder to strengthen the cylinder and to reduce the aperture size uniformally.
Claim 4
Independent Claim
62 words
A method of coating a rotary screen printing cylinder with a plastic material, said cylinder being electrically conductive and having apertures in its surface of a size ranging from 35 to 500 μm, which method comprises the electrodeposition of the plastic material uniformally over at least one surface of the cylinder to strengthen the cylinder and to reduce the aperture size uniformally.
Claim 5
Dependent Claim
38 words
The method of claim 2 wherein the initial aperture sizes are from 100 to 500 μm in a wire mesh rotary screen printing cylinder and are reduced to 40 to 200 μm by the electrodeposition for plastic material.
Claim 6
Independent Claim
59 words
A method of coating a rotary screen printing cylinder with a plastic material, said cylinder being electrically conductive and having apertures in its surface of a size ranging from 35 to 500 μm, which method comprises the electrodeposition of the plastic material uniformally over at least one surface of the cylinder to strengthen the cylinder without aperture size reduction.
Claim 7
Independent Claim
59 words
A method of coating a rotary screen printing cylinder with a plastic material, said cylinder being electrically conductive and having apertures in its surface of a size ranging from 35 to 500 μm, which method comprises the electrodeposition of the plastic material uniformally over at least one surface of the cylinder to strengthen the cylinder without aperture size reduction.
Claim 8
Dependent Claim
19 words
The method of claim 1, 2 or 4 wherein the cylinder is a wire mesh rotary screen printing cylinder.
Claim 9
Dependent Claim
20 words
The method of claim 1, 2 or 4 wherein the plastic material is deposited on one surface of the cylinder.
Claim 10
Dependent Claim
15 words
The method of claim 6 wherein the cylinder is an electroformed rotary screen printing cylinder.
Claim 11
Dependent Claim
45 words
The method of claim 7 wherein said electroformed rotary screen printing cylinder is formed by electrodeposition of a metal on a mandrel and wherein the surface of the cylinder which is not to be coated is protected during the electrodeposition process by the mandrel itself.
Claim 12
Dependent Claim
23 words
The method of claim 6 wherein the surface of the cylinder which is not to be coated is protected during the electrodeposition process.
Claim 13
Dependent Claim
19 words
The method of claim 9 wherein the surface is protected by a coating or film of a non-conductive material.
Claim 14
Dependent Claim
19 words
The method of claim 9 wherein the surface is protected by inflating a bag or tube inside the cylinder.
Claim 15
Dependent Claim
20 words
The method of claim 1, 2 or 4 wherein the plastic material is deposited on two surfaces of the cylinder.
Claim 16
Dependent Claim
28 words
The method of claim 1, 2 or 4 wherein the plastic material is selected from the group consisting of epoxies, acrylics, polyesters, polyurethanes, alkyds and cross-linkable vinyl polymers.
Claim 17
Dependent Claim
81 words
The method of claim 1, 2 or 4 wherein the electrodeposition is effected by immersing the cylinder in a tank containing the plastic material in the form selected from the group consisting of aqueous dispersions, emulsions or solutions and then depositing said plastic using a current density of 2:20 mA/cm 2 at 50 to 150 volts at a temperature of 20° to 45° C. for 0.25 to 3 minutes, wherein said cylinder is connected as either the anode or the cathode.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-23 | 1986-11-22 | 1987-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-23 | 1990-11-22 | 1991-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-23 | 1994-11-22 | 1995-05-24 | $7700.00 | Window Closed / Lapsed |