EP0007373B1 - Apparatus for establishing measuring values corresponding to the material cross-section area of fibre slivers processed in spinning preparation - Google Patents

Apparatus for establishing measuring values corresponding to the material cross-section area of fibre slivers processed in spinning preparation Download PDF

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Publication number
EP0007373B1
EP0007373B1 EP78900223A EP78900223A EP0007373B1 EP 0007373 B1 EP0007373 B1 EP 0007373B1 EP 78900223 A EP78900223 A EP 78900223A EP 78900223 A EP78900223 A EP 78900223A EP 0007373 B1 EP0007373 B1 EP 0007373B1
Authority
EP
European Patent Office
Prior art keywords
measuring
section
fibre
cross
section area
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
EP78900223A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0007373A1 (en
Inventor
Robert Moser
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.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
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 Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0007373A1 publication Critical patent/EP0007373A1/en
Application granted granted Critical
Publication of EP0007373B1 publication Critical patent/EP0007373B1/en
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G23/00—Feeding fibres to machines; Conveying fibres between machines
    • D01G23/06—Arrangements in which a machine or apparatus is regulated in response to changes in the volume or weight of fibres fed, e.g. piano motions

Definitions

  • the present invention concerns an apparatus for establishing measuring values corresponding to the material cross-section area of fibre slivers processed in spinning preparation, with a funnel section having a converging cross-section as seen in the direction of travel of a fibre sliver passing therethrough.
  • the throughput measuring duct between consecutively arranged planes extending at right angles with respect to the duct axis contains a hollow room, to which a manometer is connected.
  • the pressure measured by the manometer forms a measuring valve corresponding to the material cross-section area of the fibre sliver transported through the duct.
  • the device described shows the serious disadvantage that the measuring value does not solely depend on the material cross-section area of the fibre sliver, but also depends on the fibre sliver throughput speed, the fibre shape and the fibre fineness and thus yields a biased measure of the material cross-section area of the fibre sliver.
  • an apparatus for establishing measuring values corresponding to the material cross-section area of fibre slivers processed in spinning preparation with a funnel section having a converging cross-section as seen in the direction of travel of a fibre sliver passing therethrough, characterised in that two pneumatic pressure tapping ducts are connected on one hand to two measuring points at which the funnel section is of different cross-section area and are connected on the other hand to a division circuit arrangement to receive and divide one measured pressure into the other to obtain an output signal corresponding thereto, said output signal forming a measuring value of the material cross-sectional area of the travelling fibre sliver.
  • a fibre sliver 1 for measuring is transported through a funnel 2 which in principle consists of two combined step-funnels, one of the funnels being of the lengths, 1 1 , 1 2 and of the cross-section areas A 1' A 2 and the other funnel being of the lengths 1 2 , 1 3 and of the cross-section areas A 2 , A3, the length 1 2 and the cross-section area A 2 thus being common to both funnels.
  • two measuring points 3 and 4 for measuring the pressure are provided, each being connected via the pneumatic ducts 5 and 6 respectively, with pneumatic-electric transducers 7 and 8 by which the pressure measured by a pressure measuring instrument is transformed into a proportional voltage.
  • the transducers 7 and 8 via electrical circuits 9 and 10 are connected with an electronic division circuit device 11 which yields an output signal 12.
  • the pneumatic pressure p scanned at the measuring points 3 and 4 is transformed by the transducers 7 and 8 into proportional voltage U. Both voltages subsequently are transmitted to the division circuit device 11 where their quotient is formed.
  • the output signal 12 is a voltage U(t) depending on the momentaneous titer (or linear density) of the fibre sliver, which is proportional to the quotient of the two pressures p and thus forms a measuring value of the material cross-section area of the fibre sliver 1.
  • This measuring value now is not influenced by the throughput speed of the fibre sliver nor by the fibre shape, nor by the fibre fineness, and thus is suitable for controlling purposes, or easily can be transformed by suitable transformation into a measure normally used for the material cross-section of the fibre sliver.
  • Advantageous funnel shapes do not contain, if possible, abrupt changes in cross-section area, in such manner that the position of the fibres in the fibre array remains as undisturbed as possible. It also it possible to provide the throughput measuring duct in two separate funnels arranged consecutively, each funnel being provided with a measuring point.
  • funnels 2 of suitable cross-section shape are shown, one of the funnels comprising a conical fibre throughput duct section between two cylindrical sections, and the other funnel comprising a curved convergence of the fibre throughput duct.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Preliminary Treatment Of Fibers (AREA)
EP78900223A 1977-12-22 1979-07-16 Apparatus for establishing measuring values corresponding to the material cross-section area of fibre slivers processed in spinning preparation Expired EP0007373B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1586577A CH624759A5 (it) 1977-12-22 1977-12-22
CH15865/77 1977-12-22

Publications (2)

Publication Number Publication Date
EP0007373A1 EP0007373A1 (en) 1980-02-06
EP0007373B1 true EP0007373B1 (en) 1983-03-23

Family

ID=4412618

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78900223A Expired EP0007373B1 (en) 1977-12-22 1979-07-16 Apparatus for establishing measuring values corresponding to the material cross-section area of fibre slivers processed in spinning preparation

Country Status (11)

Country Link
EP (1) EP0007373B1 (it)
JP (1) JPS55500020A (it)
AR (1) AR216966A1 (it)
AT (1) AT379241B (it)
BE (1) BE873049A (it)
CH (1) CH624759A5 (it)
DE (1) DE2857279C2 (it)
ES (1) ES476694A1 (it)
IT (1) IT1099431B (it)
NL (1) NL7810847A (it)
WO (1) WO1979000419A1 (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19528484A1 (de) * 1995-08-03 1997-02-06 Truetzschler Gmbh & Co Kg Vorrichtung an einer Strecke zur Messung der Stärke eines Faserverbandes

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3244619C2 (de) * 1982-04-01 1994-07-07 Truetzschler Gmbh & Co Kg Vorrichtung zur Regelung einer aus mehreren Teilbereichen bestehenden Spinnereivorbereitungsanlage
DE3834110A1 (de) * 1988-10-07 1990-04-12 Truetzschler & Co Verfahren und vorrichtung zur bewegungserfassung von textilfaserbaendern, z. b. kardenbaendern
US6516551B2 (en) * 2000-12-27 2003-02-11 American Technologies Network Corporation Optical sight with switchable reticle
ITUB20154753A1 (it) 2015-10-30 2017-04-30 Mesdan Spa Dispositivo di misurazione per la misurazione della finezza e della maturita? di fibre di cotone.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465818A (en) * 1943-06-26 1949-03-29 Gen Electric Device for measuring fiber density of a sliver
CH436779A (de) * 1966-05-06 1967-05-31 Zellweger Uster Ag Verfahren und Vorrichtung zur Gewinnung von Messwerten, die dem Substanzquerschnitt von Textilmaterial, insbesondere von Faserbändern, entsprechen
CH488996A (de) * 1968-12-02 1970-04-15 Honegger & Co Vorm Emil Honegg Messelement zur kontinuierlichen Überwachung der Mächtigkeit eines Faserstoffstranges

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19528484A1 (de) * 1995-08-03 1997-02-06 Truetzschler Gmbh & Co Kg Vorrichtung an einer Strecke zur Messung der Stärke eines Faserverbandes

Also Published As

Publication number Publication date
AT379241B (de) 1985-12-10
EP0007373A1 (en) 1980-02-06
NL7810847A (nl) 1979-06-26
DE2857279T1 (de) 1980-12-04
ATA748478A (de) 1985-04-15
BE873049A (fr) 1979-06-22
ES476694A1 (es) 1979-11-16
AR216966A1 (es) 1980-02-15
JPS55500020A (it) 1980-01-24
WO1979000419A1 (en) 1979-07-12
IT1099431B (it) 1985-09-18
CH624759A5 (it) 1981-08-14
DE2857279C2 (de) 1986-02-06
IT7829047A0 (it) 1978-10-24

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