US4392902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing a sieve belt of thermosettable synthetic resin helices for a papermaking machine
Assignee: TEXTIEL TECHNIEK HAAKSBERGEN BV PO BOX 36 7480 AA HAAKSBERGEN HOLLAND
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Filing: 1982-03-25
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Granted: 1983-07-12
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Expires: 2002-03-25
Abstract
Abstract A sieve belt formed of a multiplicity of helices of thermosettable synthetic resin monofilament. Adjacent helices are meshed together so that overlapping windings form a channel through which a pintle-filament is passed. The helices are free of bias and torsion both before and after being assembled in the belt. After assembly the belt is stretched longitudinally and thermoset, causing the helix windings to penetrate slightly into the pintle-filament to tightly surround it with line contact, and to flatten the long legs of the oval windings between pintle-filaments.
Inventors
- 👤 Johannes Lefferts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:54
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/02; B29C53/12; D; D21; D21F; D21F1/00; D21F1/0027; D21F1/0072; B29L; B29L2031/00; B29L2031/733; Y; Y10; Y10S; Y10S162/00; Y10S162/903; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249922
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
77 words
A method for producing a sieve belt characterized by the following method steps: (a) meshing helices of thermosettable synthetic resin filament by inserting the windings of one helix between the windings of an adjacent helix so that the overlapping windings form a channel, the meshed helices being free of bias, (b) passing a pintle-filament into said channel, (c) extending the thus-formed sieve belt by applying longitudinal tension, and (d) thermosetting the sieve belt in said extended condition.
Claim 2
Independent Claim
77 words
A method for producing a sieve belt characterized by the following method steps: (a) meshing helices of thermosettable synthetic resin filament by inserting the windings of one helix between the windings of an adjacent helix so that the overlapping windings form a channel, the meshed helices being free of bias, (b) passing a pintle-filament into said channel, (c) extending the thus-formed sieve belt by applying longitudinal tension, and (d) thermosetting the sieve belt in said extended condition.
Claim 3
Dependent Claim
18 words
Method according to claim 1, wherein pressure is exerted on the area of the sieve belt during thermosetting.
Claim 4
Dependent Claim
47 words
Method according to any one of claims 1 or 2, wherein the temperature, tension and pressure on the sieve belt are selected such that said winding arcs of said helices penetrate into the pintle-filament (6) during thermosetting so as to cause it to assume a wavy configuration.
Claim 5
Dependent Claim
17 words
Method according to claim 1, wherein the thermosetting heat is supplied by a stream of hot air.
Claim 6
Dependent Claim
14 words
Method according to claim 1 wherein the meshed helices are also free of torsion.
References Cited (Backward Citations)
GB1018419A
Cited
US3717530A
Cited
US4071647A
Cited
DE2419751A1
Cited
US4345730A
Cited
US4345730C1
Cited
US4362776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-11 | 1987-01-10 | 1987-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-11 | 1991-01-10 | 1991-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-11 | 1995-01-10 | 1995-07-12 | $7700.00 | Window Closed / Lapsed |