FI935781A - A method and apparatus for continuously determining the formation and / or fiber orientation of a moving paper web - Google Patents

A method and apparatus for continuously determining the formation and / or fiber orientation of a moving paper web Download PDF

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Publication number
FI935781A
FI935781A FI935781A FI935781A FI935781A FI 935781 A FI935781 A FI 935781A FI 935781 A FI935781 A FI 935781A FI 935781 A FI935781 A FI 935781A FI 935781 A FI935781 A FI 935781A
Authority
FI
Finland
Prior art keywords
web
formation
electron beam
sweep
detector
Prior art date
Application number
FI935781A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI935781A0 (en
FI96139B (en
FI96139C (en
Inventor
Ari Visa
Olli Ventae
Pekka Kohola
Juhani Hirvonen
Mikko Laakso
Original Assignee
Valtion Teknillinen
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 Valtion Teknillinen filed Critical Valtion Teknillinen
Priority to FI935781A priority Critical patent/FI96139C/en
Publication of FI935781A0 publication Critical patent/FI935781A0/en
Publication of FI935781A publication Critical patent/FI935781A/en
Publication of FI96139B publication Critical patent/FI96139B/en
Application granted granted Critical
Publication of FI96139C publication Critical patent/FI96139C/en

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  • Analysing Materials By The Use Of Radiation (AREA)

Abstract

The invention relates to a process for continuous determination of the formation and/or fibre orientation of a movable paper web, in which an electron beam is created in an electron beam source, the beam is swept continuously, repeatedly to and fro, over the movable web transversely to its motional direction, the beam which has penetrated the web is detected by means of an essentially uniform detector, which is placed in the sweep zone and detects the total radiation reaching the whole of the sweep zone, and the formation and/or fibre orientation of the web is determined as a function of the sweep position of the beam on the web. The invention further relates to a device for continuous determination of the formation and/or fibre orientation of a movable paper web P, which device incorporates an electron beam source 1, which is placed on the leading side of the web to create and direct the electron beam through the web to its other side, a detector 2, which is placed on the other side of the web, a signal processing device 3, guide members 4, 5 for the electron beam, which are arranged to sweep the electron beam continuously again and again over the movable web P transversely to its motional direction, the detector essentially extending uniformly over the sweep zone of the beam transversely to the web and incorporating a measuring member 6, which is arranged to measure the radiation arriving at the detector and create a signal which characterizes the formation and/or fibre orientation of the paper as a function of the sweep position of the beam on the web. <IMAGE>
FI935781A 1993-12-21 1993-12-21 Method and apparatus for continuous determination of formation and / or fiber orientation of a moving paper web FI96139C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FI935781A FI96139C (en) 1993-12-21 1993-12-21 Method and apparatus for continuous determination of formation and / or fiber orientation of a moving paper web

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI935781A FI96139C (en) 1993-12-21 1993-12-21 Method and apparatus for continuous determination of formation and / or fiber orientation of a moving paper web

Publications (4)

Publication Number Publication Date
FI935781A0 FI935781A0 (en) 1993-12-21
FI935781A true FI935781A (en) 1995-06-22
FI96139B FI96139B (en) 1996-01-31
FI96139C FI96139C (en) 1996-05-10

Family

ID=8539160

Family Applications (1)

Application Number Title Priority Date Filing Date
FI935781A FI96139C (en) 1993-12-21 1993-12-21 Method and apparatus for continuous determination of formation and / or fiber orientation of a moving paper web

Country Status (1)

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FI (1) FI96139C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE525320C2 (en) * 2003-06-06 2005-02-01 More Res Oernskoeldsvik Ab Method and apparatus for assessing / measuring surface weight variation of sheet material

Also Published As

Publication number Publication date
FI935781A0 (en) 1993-12-21
FI96139B (en) 1996-01-31
FI96139C (en) 1996-05-10

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