US4362776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sieve belt with filler material
Assignee: Siteg Siebtechnik GmbH
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Filing: 1981-10-14
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Granted: 1982-12-07
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Expires: 2001-10-14
Abstract
Abstract The sieve belt is comprised of a multiplicity of helices made of thermosettable synthetic resin material which are interlocked with each other by inserting a plurality of pintle wires into the channels defined by the overlapping helices. For controlling the air permeability of the sieve belt, the hollow interiors of the helices are filled with a filler material comprised of crimped synthetic filaments.
Inventors
- 👤 Johannes Lefferts
- 👤 Roelof Roelofs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:47
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/0027; D21F1/0072; Y; Y10; Y10S; Y10S162/00; Y10S162/902; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49838; Y10T29/53; Y10T29/53696; Y10T428/00; Y10T428/249921; Y10T428/249922
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
75 words
A sieve belt comprised of a plurality of helices made from thermoset synthetic resin material with adjacent helices intermeshed so that the windings of one helix enter between the windings of the adjacent helix, a pintle wire disposed in each of the respective channels formed by the intermeshed windings of adjacent helices and a filler material within the hollow interior of each of the helices, said filler material being comprised of crimped or undulating filaments.
Claim 2
Dependent Claim
75 words
A sieve belt comprised of a plurality of helices made from thermoset synthetic resin material with adjacent helices intermeshed so that the windings of one helix enter between the windings of the adjacent helix, a pintle wire disposed in each of the respective channels formed by the intermeshed windings of adjacent helices and a filler material within the hollow interior of each of the helices, said filler material being comprised of crimped or undulating filaments.
Claim 3
Dependent Claim
28 words
A sieve belt according to claim 1, wherein the initial length of the filler material in the hollow interior of the helix exceeds the length of the helix.
Claim 4
Dependent Claim
14 words
A sieve belt according to claims 1 or 2, wherein said helices are unbiased.
Claim 5
Dependent Claim
17 words
A sieve belt according to claim 3, wherein the synthetic resin material is a torsion-free mono-filament wire.
Claim 6
Dependent Claim
20 words
A sieve belt according to claim 3, wherein each helix is comprised of a yarn composed of two individual filaments.
Claim 7
Dependent Claim
14 words
A sieve belt according to claim 3, wherein the crimped filler material is thermoset.
Claim 8
Dependent Claim
22 words
A sieve belt according to claim 3, wherein the filler material is a mono-filament or multi-filament yarn, spun yarn or taped yarn.
Claim 9
Independent Claim
53 words
A method for producing a sieve belt comprising filling the interior of a plurality of helices with a filler material, intermeshing a plurality of helices so that the windings of one helix are disposed between the windings of an adjacent helix to define a channel and inserting a pintle wire through each channel.
Claim 10
Independent Claim
53 words
A method for producing a sieve belt comprising filling the interior of a plurality of helices with a filler material, intermeshing a plurality of helices so that the windings of one helix are disposed between the windings of an adjacent helix to define a channel and inserting a pintle wire through each channel.
Claim 11
Dependent Claim
23 words
A method according to claim 8, wherein during the production of the helices a synthetic resin wire is wound about said filler material.
Claim 12
Dependent Claim
18 words
A method according to claim 9, further comprising thermosetting the filler material in an undulated or crimped condition.
References Cited (Backward Citations)
US4346138A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-06 | 1986-06-07 | 1986-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-06 | 1990-06-07 | 1990-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-06 | 1994-06-07 | 1994-12-07 | $7700.00 | Window Closed / Lapsed |