EP2155959A1 - Breitstrecken eines bandes - Google Patents
Breitstrecken eines bandesInfo
- Publication number
- EP2155959A1 EP2155959A1 EP08708526A EP08708526A EP2155959A1 EP 2155959 A1 EP2155959 A1 EP 2155959A1 EP 08708526 A EP08708526 A EP 08708526A EP 08708526 A EP08708526 A EP 08708526A EP 2155959 A1 EP2155959 A1 EP 2155959A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stretching
- elements
- band
- strip
- stretching elements
- 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.)
- Ceased
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/36—Guiding mechanisms
- D21F1/365—Guiding mechanisms for controlling the lateral position of the screen
Definitions
- the invention relates to a method and an apparatus for spreading an endlessly circulating belt in a machine for producing and / or finishing a paper, board, tissue or another fibrous web.
- the object of the invention is therefore to reduce the effort for spreading.
- the object with regard to the method has been achieved in that the band is at least temporarily clamped at both margins at least one stretching point between at least two stretching elements, wherein the stretching elements move with a directional component in the tape running direction and a direction component transverse to the tape running direction to the corresponding edge of the tape.
- the stretching elements stretch the tape transversely to the direction of tape travel without overloading it.
- the draw points should be arranged opposite each other with respect to the band center.
- the pinching of the band ensures a secure frictional engagement between the stretching elements and the band.
- the formation of the stretching elements and the extent of the stretch it may be advantageous if individual or all stretching elements are driven or not driven. In addition, it can facilitate access and save the band, when the stretching elements are arranged wegbewegbar away from the tape.
- the band can be guided and clamped at least in each case at least one stretching point between at least two stretching elements, wherein the stretching elements are movable with a directional component in the band running direction and a direction component transverse to the band running direction to the corresponding band edge.
- the resulting direction of movement of the stretching elements should be inclined between just over 0 ° and 10 °, preferably between 1 ° and 5 ° to the strip running direction.
- the direction of movement of the stretching elements is adjustable, in particular with regard to the angle to the strip running direction.
- At least one stretching element preferably several, in particular all drawing elements are coupled to a drive.
- the stretching elements can be moved away from the band via one lifting element each.
- the stretching elements can be designed as rolls or roll packages with a plurality of rolls arranged one after the other in the direction of strip travel.
- a good adhesion with simultaneous protection of the tape is obtained when the rollers have a preferably air-filled tires, which comes into contact with the tape.
- the stretching elements can be designed in an advantageous manner as endlessly circulating belts or chains.
- stretching elements In order to ensure a minimum friction between stretching element and band, the respectively lying at a draw point stretching elements should preferably via springs, lifting elements o.a. be compressed.
- the contact pressure can additionally or alternatively also start from the tires of the rollers or the lifting elements for moving away the stretching elements.
- a particularly advantageous application of the method and the device results in the spreading of a band in the form of a wire belt, a press felt or a dryer.
- Figure 1 a schematic plan view of the band 1
- Figure 2 a cross section through a draw point with stretching elements 2 and - A -
- FIGS. 3 to 5 show a draw point with other draw elements 2.
- the edges of the endlessly circulating belt 1 are guided at several stretching points of each edge between in each case two compressed stretching elements 2.
- the band 1 can be stretched evenly without the risk of distortion.
- the stretching elements 2 can be designed in various ways, but always extend over only a part of the width of the band 1.
- the stretch elements 2 have a width between 7 and 30 cm.
- the stretching elements 2 are formed only by two rotatable rollers whose axis of rotation 3 is inclined at an angle between 1 ° and 5 ° to the strip running direction 4, so that they have a directional component in the direction of tape 4 and transverse thereto in the direction of have corresponding edge of the belt 1.
- these rollers are compressed by means of pneumatic or hydraulic lifting elements or spring elements, wherein the belt 1 passes through the gap formed thereby. If necessary, the roles of these lifting elements can also be moved away from the band 1, which improves accessibility and makes a band change possible.
- both stretch elements 2 are each formed by an endlessly extending stretch band which wraps around two rolls 5. Again, the tape 2 is passed between the stretch belts, wherein the pressing of the stretch bands is carried out by compressing the respective opposite rollers 5 both stretch bands.
- a stretching element 2 is designed as a rotatable roller and the lower stretch element 2 here as a circumferential stretch band.
- the role dips at least slightly into the barrel of the stretch band.
- both stretch elements 2 are formed by stretch bands, which are arranged offset in the direction of strip 4 to each other. This also means that the rollers 5 of the opposite stretch bands are offset from each other.
Landscapes
- Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200710024386 DE102007024386A1 (de) | 2007-05-25 | 2007-05-25 | Breitstrecken eines Bandes |
| PCT/EP2008/051215 WO2008145412A1 (de) | 2007-05-25 | 2008-01-31 | Breitstrecken eines bandes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2155959A1 true EP2155959A1 (de) | 2010-02-24 |
Family
ID=39223009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08708526A Ceased EP2155959A1 (de) | 2007-05-25 | 2008-01-31 | Breitstrecken eines bandes |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2155959A1 (de) |
| DE (1) | DE102007024386A1 (de) |
| WO (1) | WO2008145412A1 (de) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU5837873A (en) * | 1973-01-11 | 1975-01-23 | Carl Otto Shipclark | Fabric fourdrinier screen tensioning |
| US4140574A (en) * | 1978-03-24 | 1979-02-20 | Beloit Corporation | Web spreader and guide |
| DE4012488C2 (de) * | 1990-04-19 | 1995-02-02 | Erhardt & Leimer Gmbh | Vorrichtung und Verfahren zum Führen und Breithalten einer Warenbahn |
-
2007
- 2007-05-25 DE DE200710024386 patent/DE102007024386A1/de not_active Withdrawn
-
2008
- 2008-01-31 WO PCT/EP2008/051215 patent/WO2008145412A1/de not_active Ceased
- 2008-01-31 EP EP08708526A patent/EP2155959A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008145412A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008145412A1 (de) | 2008-12-04 |
| DE102007024386A1 (de) | 2008-11-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20091228 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR |
|
| AX | Request for extension of the european patent |
Extension state: AL BA MK RS |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: MUELLER, ANSGAR |
|
| 17Q | First examination report despatched |
Effective date: 20100416 |
|
| DAX | Request for extension of the european patent (deleted) | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
|
| 18R | Application refused |
Effective date: 20100917 |