GB848686A - Improvements in or relating to the manufacture of felt bodies from pulp - Google Patents

Improvements in or relating to the manufacture of felt bodies from pulp

Info

Publication number
GB848686A
GB848686A GB2082656A GB2082656A GB848686A GB 848686 A GB848686 A GB 848686A GB 2082656 A GB2082656 A GB 2082656A GB 2082656 A GB2082656 A GB 2082656A GB 848686 A GB848686 A GB 848686A
Authority
GB
United Kingdom
Prior art keywords
pulp
moulding
period
slurry
immersion
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
GB2082656A
Inventor
Thomas Symington Mcleod
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.)
Plessey Co Ltd
Original Assignee
Plessey Co 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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB2082656A priority Critical patent/GB848686A/en
Publication of GB848686A publication Critical patent/GB848686A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J7/00—Manufacture of hollow articles from fibre suspensions or papier-mâché by deposition of fibres in or on a wire-net mould

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

848,686. Moulding loudspeaker cones &c from fibrous pulp. PLESSEY CO. Ltd. Feb. 12 1957 [July 5, 1956], No. 20826/56. Class 87(2). In a repetitive dip-moulding process for fibrous material with the use of hollow, porous formes in which the liquid is removed by suction, each repetition cycle includes the immersion of the forme into a body of slurry constituted by a suspension of the fibres for a predetermined immersion period and reconstitution of the slurry by admitting a predetermined quantity of fibrous pulp, compensation of any weight error of the moulded articles found by periodic sampling being effected by altering both the immersion period and the quantity of pulp admitted. In apparatus for moulding loudspeaker cones, a hollow conical form h connected to a suction pump g is connected to a dipping device f and is of adjustable height relative to its support so that the period in which its active surface remains immersed below the level m of the slurry in tank a can be varied. The pulp withdrawn by each moulding operation is replaced from a tank b via pump c under the control of a cut-off valve d operated by a timing device e. Both the length of time for which the valve d is opened during each moulding cycle by the timing device e and the effective dipping period produced by the dipping device f are controlled electrically by a computer i having an input lever j. The latter co-operates with a scale k graduated in units of weight error.
GB2082656A 1956-07-05 1956-07-05 Improvements in or relating to the manufacture of felt bodies from pulp Expired GB848686A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2082656A GB848686A (en) 1956-07-05 1956-07-05 Improvements in or relating to the manufacture of felt bodies from pulp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2082656A GB848686A (en) 1956-07-05 1956-07-05 Improvements in or relating to the manufacture of felt bodies from pulp

Publications (1)

Publication Number Publication Date
GB848686A true GB848686A (en) 1960-09-21

Family

ID=10152360

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2082656A Expired GB848686A (en) 1956-07-05 1956-07-05 Improvements in or relating to the manufacture of felt bodies from pulp

Country Status (1)

Country Link
GB (1) GB848686A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112553715A (en) * 2020-11-03 2021-03-26 青岛宏大纺织机械有限责任公司 Weighing automatic compensation method and system for fine cotton mixer
EP4108829A1 (en) * 2021-06-21 2022-12-28 Valmet Technologies Oy Arrangement in stock preparation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112553715A (en) * 2020-11-03 2021-03-26 青岛宏大纺织机械有限责任公司 Weighing automatic compensation method and system for fine cotton mixer
EP4108829A1 (en) * 2021-06-21 2022-12-28 Valmet Technologies Oy Arrangement in stock preparation

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