EP0672784A1 - Papermakers marking felt - Google Patents
Papermakers marking felt Download PDFInfo
- Publication number
- EP0672784A1 EP0672784A1 EP95300727A EP95300727A EP0672784A1 EP 0672784 A1 EP0672784 A1 EP 0672784A1 EP 95300727 A EP95300727 A EP 95300727A EP 95300727 A EP95300727 A EP 95300727A EP 0672784 A1 EP0672784 A1 EP 0672784A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- felt
- marking
- papermakers
- base cloths
- marking felt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F7/00—Other details of machines for making continuous webs of paper
- D21F7/08—Felts
- D21F7/083—Multi-layer felts
Definitions
- the present invention relates to a papermakers marking felt.
- Marking felts are used in the manufacture of various grades of paper which require a distinctive pattern embossed thereon.
- the most common area of application is in the manufacture of writing paper, envelopes, and other such stationery.
- the most commonly used form of marking felt is made entirely from wool.
- a papermakers marking felt comprising two woven base cloths and one or more additional layers, needled to the base cloths so as to bond the two base cloths together.
- the marking felts of the present invention have a far greater working life than conventional woollen felts.
- the quality and intensity of the marking by the felt remains more regular over long periods of usage than known felts.
- a further advantage is the consistent reproducibility of marking of similar felts which have only minor dimensional variation unlike woollen felts which exhibit significant dimensional variation.
- the marking felts of the invention allow for water drainage for a paper web, whereas woollen felts do not.
- the two woven base cloths have different weave patterns.
- the non-correspondence of the weave patterns i.e. the fact that the two weave patterns are out of phase creates an irregular array of bumps distributed over a sufficiently wide area such that no repetitive pattern can be distinguished by the naked eye.
- the woven base cloths preferably comprise synthetic fibres, for example monofilaments, cabled monofilaments, multi-filaments or any spun fibres in general.
- the needled layer or layers may be provided on one or both faces of the marking felt.
- a papermakers marking felt 10 comprises an upper base cloth 11, a lower base cloth 12 and a further layer 13 needled to the two base layers 11,12.
- Felt 10 comprises upper and lower base cloths woven from cabled PA 6.6 yarn, needled on both sides with 22dtex PA6 staple, giving a unit weight of 1320 g/m2 ⁇ 8% and a permeability of 64 cfm ⁇ 10%.
- Figs.2 and 3 show the impression left on paper during the manufacture thereof using solely the base cloths 11 and 12 respectively.
- Fig.4 shows the impression left on paper during the manufacture thereof using the felt 10.
- Fig.5 shows a seamed papermakers marking felt 20 of similar construction to that shown in Fig.1.
- Felt 20 comprises a lower base cloth woven from monofilament yarns and an upper base cloth woven from multifilament warp and monofilament weft yarns.
- the base cloths are needled on both sides with 22 dtex PA6 staple giving a unit weight of 1380g/m2 ⁇ 8% and a permeability of 60cfm ⁇ 10%.
- Figs. 6 and 7 show the impression left on paper during manufacture thereof using solely the upper and lower base cloths of the felt respectively.
- Fig.8 shows the impression left on paper during the manufacture thereof using the felt 20.
Landscapes
- Paper (AREA)
Abstract
Description
- The present invention relates to a papermakers marking felt.
- Marking felts are used in the manufacture of various grades of paper which require a distinctive pattern embossed thereon. The most common area of application is in the manufacture of writing paper, envelopes, and other such stationery. The most commonly used form of marking felt is made entirely from wool.
- It is an object of the present invention to provide superior marking felts to conventional woollen felts.
- According to the present invention there is provided a papermakers marking felt comprising two woven base cloths and one or more additional layers, needled to the base cloths so as to bond the two base cloths together.
- The marking felts of the present invention have a far greater working life than conventional woollen felts. The quality and intensity of the marking by the felt remains more regular over long periods of usage than known felts. A further advantage is the consistent reproducibility of marking of similar felts which have only minor dimensional variation unlike woollen felts which exhibit significant dimensional variation. Furthermore, the marking felts of the invention allow for water drainage for a paper web, whereas woollen felts do not.
- Ideally the two woven base cloths have different weave patterns. In such circumstances the non-correspondence of the weave patterns, i.e. the fact that the two weave patterns are out of phase creates an irregular array of bumps distributed over a sufficiently wide area such that no repetitive pattern can be distinguished by the naked eye.
- The woven base cloths preferably comprise synthetic fibres, for example monofilaments, cabled monofilaments, multi-filaments or any spun fibres in general.
- The needled layer or layers may be provided on one or both faces of the marking felt.
- In order that the present invention may be more readily understood specific embodiments thereof will now be described by way of example only with reference to the accompanying drawings in which:-
- Fig.1 shows side elevations of the two base cloths of a marking felt in accordance with the invention and a plan view of the needled layer;
- Fig.2 shows a pattern provided in paper made by using the upper base cloth alone of the felt shown in Fig.1;
- Fig.3 shows a pattern provided in paper made by using the lower base cloth alone of the felt shown in Fig. 1;
- Fig.4 shows a pattern provided in paper made by using the marking felt of Fig.1;
- Fig.5 shows side elevations of the two base cloths of a second marking felt in accordance with the invention and a plan view of the needled layer;
- Fig.6 shows a pattern provided in paper made by using the upper base cloth alone of the felt shown in Fig.5;
- Fig.7 shows a pattern provided in paper made by using the lower base cloth alone of the felt shown in Fig.5; and
- Fig.8 shows a pattern provided in paper made by using the marking felt of Fig.5.
- Referring to Fig.1 a papermakers marking felt 10 comprises an
upper base cloth 11, alower base cloth 12 and afurther layer 13 needled to the twobase layers Felt 10 comprises upper and lower base cloths woven from cabled PA 6.6 yarn, needled on both sides with 22dtex PA6 staple, giving a unit weight of 1320 g/m² ± 8% and a permeability of 64 cfm ± 10%. - Figs.2 and 3 show the impression left on paper during the manufacture thereof using solely the
base cloths felt 10. - Fig.5 shows a seamed papermakers marking felt 20 of similar construction to that shown in Fig.1. Felt 20 comprises a lower base cloth woven from monofilament yarns and an upper base cloth woven from multifilament warp and monofilament weft yarns. The base cloths are needled on both sides with 22 dtex PA6 staple giving a unit weight of 1380g/m² ± 8% and a permeability of 60cfm ± 10%.
- Figs. 6 and 7 show the impression left on paper during manufacture thereof using solely the upper and lower base cloths of the felt respectively. Fig.8 shows the impression left on paper during the manufacture thereof using the felt 20.
- It is to be understood that the above described embodiments are by way of illustration only. Many modifications and variations are possible.
Claims (5)
- A papermakers marking felt comprising two woven base cloths and one or more additional layers, needled to the base cloths so as to bond the two base cloths together.
- A papermakers marking felt as claimed in claim 1, characterised in that the two base cloths have different weave patterns.
- A papermakers marking felt as claimed in claim 1 or claim 2, characterised in that an additional layer is needled to one face of the marking felt.
- A papermakers marking felt as claimed in claim 1 or claim 2, characterised in that additional layers are needled to both faces of the marking felt.
- A papermakers marking felt as claimed in any preceding claim, characterised in that the woven base cloth comprises any of the following: monofilaments, cabled monofilaments, multi-filaments or spun fibres.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9405187 | 1994-03-10 | ||
GB9405187A GB2287257A (en) | 1994-03-10 | 1994-03-10 | Papermakers marking felt |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0672784A1 true EP0672784A1 (en) | 1995-09-20 |
EP0672784B1 EP0672784B1 (en) | 2000-09-13 |
Family
ID=10751980
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19950300727 Expired - Lifetime EP0672784B1 (en) | 1994-03-10 | 1995-02-06 | Papermakers marking felt |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0672784B1 (en) |
DE (1) | DE69518776T2 (en) |
GB (1) | GB2287257A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022037832A1 (en) | 2020-08-18 | 2022-02-24 | Voith Patent Gmbh | Press felt |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6610173B1 (en) | 2000-11-03 | 2003-08-26 | Kimberly-Clark Worldwide, Inc. | Three-dimensional tissue and methods for making the same |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4283454A (en) * | 1980-02-08 | 1981-08-11 | Porritts & Spencer Inc. | Papermakers wet felt with ribbed and smooth surface textures |
US4425392A (en) * | 1981-04-23 | 1984-01-10 | Ichikawa Woolen Textile Co., Ltd. | Needle punched papermaking felt and method of manufacturing the same |
US4564985A (en) * | 1981-10-08 | 1986-01-21 | Nippon Felt Co., Ltd. | Felt for paper manufacture and method for producing the same |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2437303A1 (en) * | 1974-08-02 | 1976-02-12 | Marx Gmbh J J | Paper making wet felt - made of several superposed woven mesh fabrics coated with matted fibre layers |
US4503113A (en) * | 1982-03-12 | 1985-03-05 | Huyck Corporation | Papermaker felt with a three-layered base fabric |
FI72767B (en) * | 1985-11-01 | 1987-03-31 | Tamfelt Oy Ab | FOERFARANDE FOER TILLVERKNING AV EN PRESSFILT OCH EN PRESSFILT. |
DE3915909A1 (en) * | 1989-05-16 | 1990-11-22 | Marx Gmbh J J | FELT CLOTH FOR PAPER MACHINES |
BR9206799A (en) * | 1991-11-21 | 1995-05-02 | Weavexx Corp | Multi-layer felts |
-
1994
- 1994-03-10 GB GB9405187A patent/GB2287257A/en not_active Withdrawn
-
1995
- 1995-02-06 DE DE1995618776 patent/DE69518776T2/en not_active Expired - Fee Related
- 1995-02-06 EP EP19950300727 patent/EP0672784B1/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4283454A (en) * | 1980-02-08 | 1981-08-11 | Porritts & Spencer Inc. | Papermakers wet felt with ribbed and smooth surface textures |
US4425392A (en) * | 1981-04-23 | 1984-01-10 | Ichikawa Woolen Textile Co., Ltd. | Needle punched papermaking felt and method of manufacturing the same |
US4564985A (en) * | 1981-10-08 | 1986-01-21 | Nippon Felt Co., Ltd. | Felt for paper manufacture and method for producing the same |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022037832A1 (en) | 2020-08-18 | 2022-02-24 | Voith Patent Gmbh | Press felt |
Also Published As
Publication number | Publication date |
---|---|
GB2287257A (en) | 1995-09-13 |
DE69518776D1 (en) | 2000-10-19 |
DE69518776T2 (en) | 2001-04-12 |
EP0672784B1 (en) | 2000-09-13 |
GB9405187D0 (en) | 1994-04-27 |
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