Patent US5023986A successfully refreshed from Google Patents.
US5023986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a wave screen plate
Assignee: Beloit Technologies Inc
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Filing: 1990-04-17
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Granted: 1991-06-18
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Expires: 2010-04-17
Abstract
Abstract A paper pulp screening apparatus wherein a modular cylindrically-shaped screen plate is formed of a thin material of uniform thickness bent to form an undulating shape to increase the screening area, and the screen plate is supported by cylindrical-backing members to give the plate strength, with the plate being formed into various complex shapes. Manufacturing methods for forming the undulating shapes are disclosed.
Inventors
- 👤 William Gero
- 👤 Frank Paskowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:56
CPC Classifications
D; D21; D21D; D21D5/00; D21D5/02; D21D5/16; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/496; Y10T29/49604
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
74 words
A method for making a modular screen plate for use in a pulp pressure screening apparatus, said method comprising: forming undulations in relatively thin sheet material by bending; shaping said formed sheet material into a generally cylindrical shape; creating openings through said material; placing rigid support members at opposite ends of said cylindrically shaped material; and securing the position of said rigid support members relative to each other by fastening therebetween releasable tieing members.
Claim 2
Independent Claim
74 words
A method for making a modular screen plate for use in a pulp pressure screening apparatus, said method comprising: forming undulations in relatively thin sheet material by bending; shaping said formed sheet material into a generally cylindrical shape; creating openings through said material; placing rigid support members at opposite ends of said cylindrically shaped material; and securing the position of said rigid support members relative to each other by fastening therebetween releasable tieing members.
Claim 3
Dependent Claim
24 words
The method for making a screen plate as defined in claim 1, in which said step of creating openings is performed by a punch.
Claim 4
Dependent Claim
24 words
The method for making a screen plate as defined in claim 1, in which said step of creating openings is performed by laser burning.
Claim 5
Dependent Claim
47 words
The method for making a screen plate as defined in claim 1, in which said step of forming undulations is performed by complimentary forming members operated on opposite sides of said sheet-like material, bending and forming said sheet-like material into desired undulations without stretching the sheet-like material.
Claim 6
Dependent Claim
27 words
A method for making a screen plate as defined in claim 1, in which said step of creating openings is performed before said step of forming undulations.
Claim 7
Dependent Claim
27 words
The method for making a screen plate as defined in claim 1, in which said step of creating openings is performed after said step of forming undulations.
Claim 8
Dependent Claim
35 words
The method for making a screen plate as defined in claim 1, in which said step of creating openings through said material is performed by punching holes therein, while forming undulations in the sheet material.
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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) | 1994-06-17 | 1994-12-17 | 1995-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-17 | 1998-12-17 | 1999-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-17 | 2002-12-17 | 2003-06-18 | $7700.00 | Window Closed / Lapsed |