US4478688A
Expired / Lapsed
US
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Process of manufacturing screen material
Assignee: Stork Veco BV
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Filing: 1983-08-08
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Granted: 1984-10-23
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Expires: 2003-08-08
Abstract
Abstract In a process of manufacturing screen material a metal matrix is subjected to an electrolytic metal deposition by using an electrolytic bath containing a brightener, the liquid of the bath being forced to flow through apertures in the anode toward the cathode. The metal deposits grow substantially perpendicular to the lands of the matrix and thus a screen is formed having apertures of approximately the same size as the apertures of the original matrix. The screen can be removed from the matrix by previously coating the latter with a separating agent such as beeswax.
Inventors
- 👤 Johan A. de Hek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:56
CPC Classifications
C; C25; C25D; C25D1/00; C25D1/08; B; B41; B41N; B41N1/00; B41N1/24; B41N1/247; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/934; Y10S428/935; Y10T; Y10T428/00; Y10T428/12; Y10T428/12361; Y10T428/12479
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
77 words
Process of electrolytically manufacturing screen material by depositing a metal upon a sieve-like porous matrix having apertures therethrough, the process comprising: placing the matrix in an electrolytic bath, the bath containing at least one brightener, connecting the matrix as a cathode, spacing an anode from the cathode, flowing the bath liquid at least during part of the electrolytic deposition, through the apertures in the matrix connected as the cathode and only from the anode toward the cathode.
Claim 2
Dependent Claim
77 words
Process of electrolytically manufacturing screen material by depositing a metal upon a sieve-like porous matrix having apertures therethrough, the process comprising: placing the matrix in an electrolytic bath, the bath containing at least one brightener, connecting the matrix as a cathode, spacing an anode from the cathode, flowing the bath liquid at least during part of the electrolytic deposition, through the apertures in the matrix connected as the cathode and only from the anode toward the cathode.
Claim 3
Dependent Claim
21 words
The process of claim 1, wherein the bath liquid is made to flow at a speed of at least 0.005 m/sec.
Claim 4
Dependent Claim
24 words
The process of claim 1, wherein the bath liquid is made to flow at a speed in a range of 0.05 to 1 m/sec.
Claim 5
Dependent Claim
20 words
The process of claim 1, wherein the forced flow of bath liquid is applied at the start of the electrolysis.
Claim 6
Dependent Claim
31 words
The process of claim 1, wherein the bath liquid is made to flow through the apertures in the cathode for a period of less than 10% of the total electrolysis time.
Claim 7
Dependent Claim
19 words
The process of claim 1, wherein the cathode current density is adjusted to and maintained at a predetermined value.
Claim 8
Dependent Claim
25 words
The process of claim 1, wherein the electrolytic bath contains an organic compound having at least one unsaturated bond not belonging to a ##STR2## group.
Claim 9
Dependent Claim
17 words
The process of claim 1, wherein the electrolytic bath contains a compound presenting second class brightener properties.
Claim 10
Dependent Claim
20 words
The process of claim 1, wherein said compound is chosen from the group consisting of a butyne and ethylene cyanohydrin.
Claim 11
Dependent Claim
25 words
The process of claim 1, wherein the matrix is given a surface treatment for enabling the electrolytically deposited material to be removed as a screen.
Claim 12
Dependent Claim
74 words
The process of claim 1, wherein the matrix is subjected to electrolysis in an electrolytic bath containing an organic compound having at least one double bond not belonging to a ##STR3## group while a forced flow of liquid takes place through the cathode apertures and perpendicular to the cathode, whereafter, with the cathode current density adjusted to a predetermined value the electrolysis is continued, and thereafter the resulting screen is removed from the matrix.
Claim 13
Dependent Claim
74 words
The process of claim 1, wherein the matrix is subjected to electrolysis in an electrolytic bath containing an organic compound having at least one triple bond not belonging to a ##STR4## group while a forced flow of liquid takes place through the cathode apertures and perpendicular to the cathode, whereafter, with the cathode current density adjusted to a predetermined value the electrolysis is continued, and thereafter the resulting screen is removed from the matrix.
Claim 14
Dependent Claim
12 words
The process of claim 1, wherein the matrix is a cylindrical matrix.
Claim 15
Dependent Claim
61 words
Screen material produced by the process of depositing metal from an electrolytic bath upon a sievelike matrix using at least one brightener is the electrolytic bath, wherein the screen material is produced by flowing the bath liquid through the apertures in the cathode-connected matrix, only from the anode toward the cathode during at least a part of the electrolytic metal depositon.
Claim 16
Dependent Claim
61 words
Screen material produced by the process of depositing metal from an electrolytic bath upon a sievelike matrix using at least one brightener is the electrolytic bath, wherein the screen material is produced by flowing the bath liquid through the apertures in the cathode-connected matrix, only from the anode toward the cathode during at least a part of the electrolytic metal depositon.
Claim 17
Dependent Claim
31 words
The screen material of claim 14, wherein said screen material is obtained by using electrolytic bath a brightener which contains at least one unsaturated bond not belonging to a ##STR5## group.
Claim 18
Dependent Claim
18 words
The screen material of claim 14, wherein the electrolytic bath contains a compound presenting second class brightener properties.
Claim 19
Dependent Claim
22 words
The screen material of claim 14, wherein the bath liquid is made to flow at a speed of at least 0.005 m/sec.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-23 | 1988-04-23 | 1988-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-23 | 1992-04-23 | 1992-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-23 | 1996-04-23 | 1996-10-23 | $7700.00 | Window Closed / Lapsed |