Patent US3815645A successfully refreshed from Google Patents.
US3815645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine cloth for the paper or cellulose industries
Assignee: Nordiska Maskinfilt AB
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Filing: 1971-12-27
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Granted: 1974-06-11
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Expires: 1991-12-27
Abstract
Abstract A papermaker''s cloth or a cloth for similar purposes having interlacing means at both transverse edges of the cloth in the shape of loops which, when interlocked form a continuous joint in said cloth. The locking loops are formed by weaving the weft yarns in two different layers about one or two temporary threads positioned at the edge or edges of the warp, or alternatively, at the centre thereof, whereby the locking loops will be located entierly between the upper and the lower surfaces of the weave. The loops are thereafter heat treated and the temporary thread removed. The invention also concerns a method of producing said loops.
Inventors
- 👤 F Codorniu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:17
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/0027; D21F1/0054; D21F1/0036; Y; Y10; Y10S; Y10S162/00; Y10S162/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A flat woven double layer cloth having surfaces forming two planes and terminating in two transverse edges, having warp and weft threads, for use in the paper making and cellulose industries, particulary as a cloth for dewatering and filtering and as a forming fabric for cellulose and course paper and as a press felt, said cloth having the weft threads longitudinal in the position of use, each of said layers having first and second planes of weft threads, locking loops formed by joining respective weft threads of said first plane and said second plane in the two transverse edges of said cloth, said locking loops of said respective layers being adapted for interconnection by means of a locking thread for the purpose of making said cloth endless, and said locking loops being positioned in their entirety between the two surfaces of said cloth.
Claim 2
Dependent Claim
143 words
A flat woven double layer cloth having surfaces forming two planes and terminating in two transverse edges, having warp and weft threads, for use in the paper making and cellulose industries, particulary as a cloth for dewatering and filtering and as a forming fabric for cellulose and course paper and as a press felt, said cloth having the weft threads longitudinal in the position of use, each of said layers having first and second planes of weft threads, locking loops formed by joining respective weft threads of said first plane and said second plane in the two transverse edges of said cloth, said locking loops of said respective layers being adapted for interconnection by means of a locking thread for the purpose of making said cloth endless, and said locking loops being positioned in their entirety between the two surfaces of said cloth.
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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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |