GB1447933A - Manufacture of watermarked paper - Google Patents

Manufacture of watermarked paper

Info

Publication number
GB1447933A
GB1447933A GB2364574A GB2364574A GB1447933A GB 1447933 A GB1447933 A GB 1447933A GB 2364574 A GB2364574 A GB 2364574A GB 2364574 A GB2364574 A GB 2364574A GB 1447933 A GB1447933 A GB 1447933A
Authority
GB
United Kingdom
Prior art keywords
belt
carrier
paper
watermarking
another
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.)
Expired
Application number
GB2364574A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Portals Ltd
Original Assignee
Portals Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Portals Ltd filed Critical Portals Ltd
Priority to GB2364574A priority Critical patent/GB1447933A/en
Publication of GB1447933A publication Critical patent/GB1447933A/en
Application status is Expired legal-status Critical

Links

Classifications

    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00Wet end of machines for making continuous webs of paper
    • D21F1/44Watermarking devices

Abstract

1447933 Watermarking paper PORTALS Ltd and A J TOOTH 26 June 1975 [28 May 1974] 23645/74 Heading D2A Paper is watermarked during or after formation using an endless flexible carrier 7, 32 or 51 moving in a non-circular path around spaced axes and carrying embossing and/or shaped projecting attachments, for producing a watermark in paper, the carrier being replaceable by another of different length by adjusting the spacing of the axes. The carrier may be a foraminous bronze wire belt, alone or supported, as in Fig. 6, by another belt, e.g. of plastic mesh in which case the support belt 53 may be correspondingly embossed to prevent the embossing of the belt 51 from being crushed. In a Fourdrinier machine (Fig. 1) the belt 7 may be guided around a driven dandy roll 6, which may contain vacuum and/or over-pressure chambers, and an adjustable roll 8. Alternatively (as in Fig. 5 not shown) the Fourdrinier wire may itself constitute the watermarking carrier. When applied to a cylinder machine (Fig. 4), the belt 32 passes around the surface of the cylinder mould 35 and at least one adjustable roll 33, 34.
GB2364574A 1974-05-28 1974-05-28 Manufacture of watermarked paper Expired GB1447933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2364574A GB1447933A (en) 1974-05-28 1974-05-28 Manufacture of watermarked paper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2364574A GB1447933A (en) 1974-05-28 1974-05-28 Manufacture of watermarked paper

Publications (1)

Publication Number Publication Date
GB1447933A true GB1447933A (en) 1976-09-02

Family

ID=10198988

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2364574A Expired GB1447933A (en) 1974-05-28 1974-05-28 Manufacture of watermarked paper

Country Status (1)

Country Link
GB (1) GB1447933A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2402033A1 (en) * 1977-09-06 1979-03-30 Beloit Walmsley Ltd Longitudinally and vertically adjustable unit for upwards extraction - produces high quality thin papers without reverse side effect
US4462866A (en) * 1981-02-19 1984-07-31 Portals Limited Sheet materials
US4462867A (en) * 1981-07-13 1984-07-31 Portals Limited Paper incorporating a partially embedded strip
EP0367520A2 (en) * 1988-11-03 1990-05-09 The Wiggins Teape Group Limited Improvements in apparatus for forming watermarks in paper
US5100512A (en) * 1990-09-11 1992-03-31 The Mead Corporation Dandy roll having a twill weave wiremark and related method for papermaking
GB2260772A (en) * 1991-10-25 1993-04-28 Portals Ltd Method for making sheet materials such as security paper
US5766416A (en) * 1989-12-14 1998-06-16 Tokushu Paper Manufacturing Co., Ltd. Method of producing watermark paper
US5871615A (en) * 1994-06-14 1999-02-16 The Wiggins Teape Group Limited Method for the manufacture of security paper

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2402033A1 (en) * 1977-09-06 1979-03-30 Beloit Walmsley Ltd Longitudinally and vertically adjustable unit for upwards extraction - produces high quality thin papers without reverse side effect
US4462866A (en) * 1981-02-19 1984-07-31 Portals Limited Sheet materials
US4462867A (en) * 1981-07-13 1984-07-31 Portals Limited Paper incorporating a partially embedded strip
EP0367520A2 (en) * 1988-11-03 1990-05-09 The Wiggins Teape Group Limited Improvements in apparatus for forming watermarks in paper
EP0367520A3 (en) * 1988-11-03 1991-08-14 The Wiggins Teape Group Limited Improvements in apparatus for forming watermarks in paper
US5766416A (en) * 1989-12-14 1998-06-16 Tokushu Paper Manufacturing Co., Ltd. Method of producing watermark paper
US5100512A (en) * 1990-09-11 1992-03-31 The Mead Corporation Dandy roll having a twill weave wiremark and related method for papermaking
GB2260772A (en) * 1991-10-25 1993-04-28 Portals Ltd Method for making sheet materials such as security paper
US5405500A (en) * 1991-10-25 1995-04-11 Portals Limited Method for making sheet materials and security paper
GB2260772B (en) * 1991-10-25 1995-05-10 Portals Ltd Method for making sheet materials and security paper
US5871615A (en) * 1994-06-14 1999-02-16 The Wiggins Teape Group Limited Method for the manufacture of security paper

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19950625