WO1979000419A1 - 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 PDFInfo
- Publication number
- WO1979000419A1 WO1979000419A1 PCT/EP1978/000018 EP7800018W WO7900419A1 WO 1979000419 A1 WO1979000419 A1 WO 1979000419A1 EP 7800018 W EP7800018 W EP 7800018W WO 7900419 A1 WO7900419 A1 WO 7900419A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- measuring
- section area
- duct
- throughput
- material cross
- Prior art date
Links
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 fiber slivers processed in spinning preparation, with a pneumatic throughput measuring duct tapering off as seen in the direction of move ent of the fiber sliver.
- 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 anometer is connected.
- the pressure measured by the manometer forms a measuring value corresponding to the material cross-section area of the fiber 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 fiber sliver, but also depends on the fiber sliver throughput speed, the fiber shape and the fiber fineness and thus yields a biased measure of the material cross-section area of the fiber sliver.
- an apparatus for establishing measuring values corresponding to the material cross-section area of fiber slivers processed in spinning preparation with a pneumatic throughput measuring duct converging as seen in the direction of movement of the fiber sliver, characterized in that two pneumatic pressure measuring ducts are connected on one hand to two measuring points at which the duct is of different cross-section area and are connected on the other hand to a division circuit arrangement.
- Fig. 1 an apparatus provided with a step-funnel as a throu put measuring duct, and in
- FIG. 2 for suitable funnel shapes of the throughput and 3 measuring duct applicable in the apparatus accordin to Fig. 1.
- a fiber sliver 1 for measuring is transported through a funnel which in principle consists of two combined step-funnels, one of the funnels being of the lengths 1 .., 1 and of the cross-section areas A, A_ and the other funnel being of the length 1, 1 and of the cross-section areas A_, A-, the and the cross-section area A_ thus being com on to both
- 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 instru- ment 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 proportio- nal 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 current titer (or linear density) of the fiber 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 fiber sliver 1.
- This measuring value now is not influenced by the throughput speed of the fiber sliver nor by the fiber shape, nor by the fiber fineness, and thus is suitable for Controlling purposes, or easily can be trans-formed by suitable transformation into a measure normally used for the material cross-section of the fiber sliver.
- inventive apparatus is not limited to the step-funnel according to Fig. 1, as the eli ination of the biasing influences owing to the quotient formation does not depend on the funnel shape.
- a converging funnel of any desired shape can be used, into which the two measuring ducts 5 and 6 merge at points of differing duct cross-section area.
- Advantageous funnel shapes do not contain, if possible, abrup changes in cross-section area, in such manner that the positi of the fibers in the fiber array remains as undisturbed as possible. It also is possible to provide the throughput measu ring duct in two separate funnels arranged consecutivel, eac 100 funnel being provided with a measuring point.
- funnels 2 of 105 suitable cross-section shape are shown, one of the funnels comprising a conical fiber • throughput duct section between two cylindrical sections, and the other funnel comprising a curved convergence of the fiber throughput duct.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Preliminary Treatment Of Fibers (AREA)
Description
Apparatus for establishing measuring values corresponding to the material cross-section area of fibre slivers processed in spinning preparation
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 pneumatic throughput measuring duct tapering off as seen in the direction of move ent of the fibre sliver.
In a device of the above mentioned type (Swiss Patent No. 436.779) 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 anometer is connected. The pressure measured by the manometer forms a measuring value corresponding to the material cross-section area of the fibre sliver transported through the duct. The device described, however, 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.
It thus is the objective of the present invention to avoid this disadvantage and to create an apparatus yielding measuring values depending solely on the material cross-section area of the fibre sliver.
This objective is achieved by an apparatus for establishing measuring values corresponding to the material cross-section area of fibre slivers processed in spinning preparation, with a pneumatic throughput measuring duct converging as seen in the direction of movement of the fibre sliver, characterised in that two pneumatic pressure measuring ducts are connected on one hand to two measuring points at which the duct is of different cross-section area and are connected on the other hand to a division circuit arrangement.
The invention is described in more detail in the following with reference to illustrated design examples of the inventiv apparatus. It is shown in:
Fig. 1 an apparatus provided with a step-funnel as a throu put measuring duct, and in
Figs. 2 f rther suitable funnel shapes of the throughput and 3 measuring duct applicable in the apparatus accordin to Fig. 1.
Surprisingly, it was found that, if a fibre sliver is trans¬ ported through two pneumatic measuring ducts, the pressure in each duct is measured, and the two measuring Signals are di- vided, a signal corresponding to the material cross-section area of the fibre sliver results, which is independent of the throughput speed of the fibre sliver, of the fibre shape and of the fibre fineness.
The apparatus shown in Fig. 1 makes use of these findings. A fibre sliver 1 for measuring is transported through a funnel which in principle consists of two combined step-funnels, one of the funnels being of the lengths 1.. , 1 and of the cross- section areas A , A_ and the other funnel being of the length 1 , 1 and of the cross-section areas A_, A-, the
and the cross-section area A_ thus being com on to both
2 funnels.
At each narrowing point between the straight funnel sections 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 instru- ent is transforπted into a proportional voltage. The trans¬ ducers 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 proportio- nal 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 mo- entaneous 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 trans- formed by suitable transformation into a measure normally used for the material cross-section of the fibre sliver.
Application of the inventive apparatus described above is not limited to the step-funnel according to Fig. 1, as the eli ination of the biasing influences owing to the quotient formation does not depend on the funnel shape. As a through¬ put duct for the fibre sliver thus a converging funnel of any desired shape can be used, into which the two measuring ducts 5 and 6 merge at points of differing duct cross-section area.
Furthermore, it proves advantageous to connect the measuring ducts 5 and 6 at locations in the funnel which differ widely in duct cross-section area. In Figs. 2 and 3 funnels 2 of 105 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.
OΛ.
Claims
1. Apparatus for establishing measuring values corresponding to the material cross-section area of fibre slivers pro- cessed in spinning preparation, with a pneumatic through¬ put measuring duct converging as seen in the direction of movement of the fibre sliver, characterised in that two pneumatic pressure measuring ducts (5,6) are connected on one hand to two measuring points (3,4) at which the duct is of different cross-section area and on the other hand are connected to a division circuit arrange ent (11) .
2. Apparatus according to claim 1, characterised in that the pressure measuring ducts (5,6) are connected via two pneumatic/electric transducers (7,8) with an electro¬ nic division circuit arrangement (11) .
3. . Apparatus according to claim 1, characterised in that the throughput measuring duct is part of a hollow body (2) .
4. Apparatus according to claim 1, characterised in that the throughput measuring duct is part of two consecutively arranged hollow bodies.
5. Apparatus according to claim 3, characterised in that the throughput measuring duct contains a conical section bet- ween two cylindrical sections.
6. , Apparatus according to claim 3, characterised in that the throughput measuring duct cross-section area decreases continuously.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2857279T DE2857279C2 (de) | 1977-12-22 | 1978-10-14 | Vorrichtung zur Gewinnung von Meßgrößen, die dem Substanzquerschnitt von in der Spinnereivorbereitung anfallenden Faserbändern entsprechen |
| JP50005778A JPS55500020A (de) | 1977-12-22 | 1978-10-14 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1586577A CH624759A5 (de) | 1977-12-22 | 1977-12-22 | |
| CH15865/77 | 1977-12-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1979000419A1 true WO1979000419A1 (en) | 1979-07-12 |
Family
ID=4412618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1978/000018 WO1979000419A1 (en) | 1977-12-22 | 1978-10-14 | 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 (de) |
| JP (1) | JPS55500020A (de) |
| AR (1) | AR216966A1 (de) |
| AT (1) | AT379241B (de) |
| BE (1) | BE873049A (de) |
| CH (1) | CH624759A5 (de) |
| DE (1) | DE2857279C2 (de) |
| ES (1) | ES476694A1 (de) |
| IT (1) | IT1099431B (de) |
| NL (1) | NL7810847A (de) |
| WO (1) | WO1979000419A1 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3244619A1 (de) * | 1982-04-01 | 1983-10-06 | Truetzschler & Co | Verfahren und vorrichtung zur steuerung und regelung der maschinen einer spinnereivorbereitungsanlage |
| US6516551B2 (en) * | 2000-12-27 | 2003-02-11 | American Technologies Network Corporation | Optical sight with switchable reticle |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3834110A1 (de) * | 1988-10-07 | 1990-04-12 | Truetzschler & Co | Verfahren und vorrichtung zur bewegungserfassung von textilfaserbaendern, z. b. kardenbaendern |
| DE19528484A1 (de) * | 1995-08-03 | 1997-02-06 | Truetzschler Gmbh & Co Kg | Vorrichtung an einer Strecke zur Messung der Stärke eines Faserverbandes |
| 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. |
Citations (2)
| 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 |
| CH488996A (de) * | 1968-12-02 | 1970-04-15 | Honegger & Co Vorm Emil Honegg | Messelement zur kontinuierlichen Überwachung der Mächtigkeit eines Faserstoffstranges |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
1977
- 1977-12-22 CH CH1586577A patent/CH624759A5/de not_active IP Right Cessation
-
1978
- 1978-10-14 JP JP50005778A patent/JPS55500020A/ja active Pending
- 1978-10-14 WO PCT/EP1978/000018 patent/WO1979000419A1/de unknown
- 1978-10-14 DE DE2857279T patent/DE2857279C2/de not_active Expired
- 1978-10-18 AT AT0748478A patent/AT379241B/de not_active IP Right Cessation
- 1978-10-24 IT IT29047/78A patent/IT1099431B/it active
- 1978-10-31 NL NL7810847A patent/NL7810847A/xx not_active Application Discontinuation
- 1978-12-13 AR AR274792A patent/AR216966A1/es active
- 1978-12-15 ES ES476694A patent/ES476694A1/es not_active Expired
- 1978-12-22 BE BE192546A patent/BE873049A/xx not_active IP Right Cessation
-
1979
- 1979-07-16 EP EP78900223A patent/EP0007373B1/de not_active Expired
Patent Citations (2)
| 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 |
| CH488996A (de) * | 1968-12-02 | 1970-04-15 | Honegger & Co Vorm Emil Honegg | Messelement zur kontinuierlichen Überwachung der Mächtigkeit eines Faserstoffstranges |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3244619A1 (de) * | 1982-04-01 | 1983-10-06 | Truetzschler & Co | Verfahren und vorrichtung zur steuerung und regelung der maschinen einer spinnereivorbereitungsanlage |
| US6516551B2 (en) * | 2000-12-27 | 2003-02-11 | American Technologies Network Corporation | Optical sight with switchable reticle |
Also Published As
| Publication number | Publication date |
|---|---|
| AT379241B (de) | 1985-12-10 |
| EP0007373A1 (de) | 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 (de) | 1980-01-24 |
| IT1099431B (it) | 1985-09-18 |
| EP0007373B1 (de) | 1983-03-23 |
| CH624759A5 (de) | 1981-08-14 |
| DE2857279C2 (de) | 1986-02-06 |
| IT7829047A0 (it) | 1978-10-24 |
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