US4470434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single-ply wire for paper machines
Assignee: Siebtuchfabrik AG
•
Filing: 1982-11-15
•
Granted: 1984-09-11
•
Expires: 2002-11-15
Abstract
Abstract A single-ply paper machine wire having a top side and a bottom side and including longitudinal machine direction threads and cross-threads, comprising a first group of cross-threads having at least one pattern repeat comprising differential lacing interwoven with a maximum of five longitudinal threads for forming said top side of said wire; a second group of cross-threads, each thread of said second group of cross-threads disposed between a pair of threads of said first group of cross-threads; said second group of cross-threads having at least one pattern repeat interwoven with at least six longitudinal threads; said second group of cross-threads pattern repeat floating under at least five of said longitudinal threads on said bottom side; and, said longitudinal and said cross-threads being synthetic is disclosed.
Inventors
- 👤 Tauno A. Vuorio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:57
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/0027; B; B01; B01D; B01D39/00; B01D39/08; B01D39/083; B01D2239/00; B01D2239/06; B01D2239/0604; B01D2239/0613; Y; Y10; Y10S; Y10S162/00; Y10S162/903; Y10T; Y10T442/00; Y10T442/30; Y10T442/3179
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
135 words
A single-ply paper-machine wire having a top side and a bottom side and including longitudinal machine direction threads and cross threads, comprising: (a) a first group of cross threads having at least one pattern repeat comprising differential lacing interwoven with a maximum of five longitudinal threads for forming said top side of said wire; (b) a second group of cross threads, each thread of said second group of cross threads disposed between a pair of threads of said first group of cross threads; (c) said second group of cross threads having at least one pattern repeat interwoven with at least six longitudinal threads; (d) said second group of cross threads pattern repeat floating under at least five of said longitudinal threads on said bottom side; and, (e) said longitudinal and said cross threads being synthetic.
Claim 2
Dependent Claim
135 words
A single-ply paper-machine wire having a top side and a bottom side and including longitudinal machine direction threads and cross threads, comprising: (a) a first group of cross threads having at least one pattern repeat comprising differential lacing interwoven with a maximum of five longitudinal threads for forming said top side of said wire; (b) a second group of cross threads, each thread of said second group of cross threads disposed between a pair of threads of said first group of cross threads; (c) said second group of cross threads having at least one pattern repeat interwoven with at least six longitudinal threads; (d) said second group of cross threads pattern repeat floating under at least five of said longitudinal threads on said bottom side; and, (e) said longitudinal and said cross threads being synthetic.
Claim 3
Dependent Claim
30 words
A paper machine wire as defined in claim 1, wherein: (a) said cross threads of said second group have a pattern repeat extending over a total of 12 longitudinal threads.
Claim 4
Dependent Claim
28 words
Paper-machine wire per claim 1, characterized in that the cross threads of the second group only cross one longitudinal thread at its top side within one pattern repeat.
Claim 5
Dependent Claim
30 words
Paper-machine wire per claim 1, characterized in that the cross threads of the second group consecutively cross at least five longitudinal threads at the bottom side within one pattern repeat.
Claim 6
Dependent Claim
28 words
Paper-machine wire per claim 1, characterized in that the cross threads of the first group have a pattern repeat extending only over a total of two longitudinal threads.
Claim 7
Dependent Claim
29 words
Paper-machine wire per claim 1, characterized in that the cross threads of the second group have a pattern repeat extending over a total of at least eight longitudinal threads.
Claim 8
Dependent Claim
64 words
Paper-machine wire per claim 1, characterized in that at those sites where a cross thread of the second group crosses a longitudinal thread at the top side, at least one adjacent cross thread from the first group which in accordance with the pattern repeat should per se also cross this longitudinal thread at the top side is made to pass underneath this longitudinal thread.
Claim 9
Dependent Claim
39 words
Paper-machine wire per claim 1, characterized in that, when seen in the direction of the longitudinal thread, a given number of cross threads from the first group alternate with a given number of cross threads from the second group.
Claim 10
Dependent Claim
37 words
Paper-machine wire per claim 8, characterized in that as seen in the direction of the longitudinal threads, at most two cross threads from the first group alternate with at most two cross threads from the second group.
Claim 11
Dependent Claim
25 words
Paper-machine wire per claim 1, characterized in that the cross threads from the second group evince a larger cross-section than those from the first group.
Claim 12
Dependent Claim
72 words
Paper-machine wire per claim 1, characterized in that the cross threads from the second group form together with the longitudinal threads a twill or Atlas weave when abstraction is made of the remaining cross threads every second cross thread of this group being offsettable in the direction of the cross threads at the top side of the longitudinal threads with respect to the crossing sites resulting from the twill or Atlas weave.
Claim 13
Dependent Claim
25 words
Paper-machine wire per claim 1, characterized in that the free internal volume of the paper-machine wire amounts to at least 50% of the wire-body volume.
Claim 14
Dependent Claim
33 words
Paper-machine wire per claim 1, characterized in that the first group of the cross threads together with the longitudinal threads form a plain weave when abstraction is made of the remaining cross threads.
Claim 15
Dependent Claim
35 words
Paper-machine wire per claim 1, characterized in that the first group of the cross threads forms together with the longitudinal threads a twill or Atlas weave when abstraction is made of the remaining cross threads.
Claim 16
Dependent Claim
61 words
Paper-machine wire per claim 1, characterized in that every second cross thread from the first group of cross threads is woven together with the longitudinal threads into a plain weave and in that the in-between cross threads from this group are woven together with the longitudinal threads into twill or Atlas weaves, when abstraction is made of all remaining cross threads.
Claim 17
Dependent Claim
70 words
Paper-machine wire per claim 1, characterized in that the cross threads from the second group are made of a synthetic of which the shrinkage during thermosetting is so much more pronounced than that of the synthetic of the cross threads from the first group that the cross threads from the second group following the thermosetting step will lie flat and under tension against the bottom side of the paper-machine wire.
References Cited (Backward Citations)
DE94069C
Cited
US2903021A
Cited
US4157276A
Cited
US4157276B1
Cited
US4239065A
Cited
US4376455A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-11 | 1988-03-12 | 1988-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-11 | 1992-03-12 | 1992-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-11 | 1996-03-12 | 1996-09-11 | $7700.00 | Window Closed / Lapsed |