US20080203131A1 - Film guiding assembly - Google Patents
Film guiding assembly Download PDFInfo
- Publication number
- US20080203131A1 US20080203131A1 US11/907,837 US90783707A US2008203131A1 US 20080203131 A1 US20080203131 A1 US 20080203131A1 US 90783707 A US90783707 A US 90783707A US 2008203131 A1 US2008203131 A1 US 2008203131A1
- Authority
- US
- United States
- Prior art keywords
- film
- turning bars
- guiding assembly
- actuator
- guiding
- 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.)
- Abandoned
Links
- 239000002985 plastic film Substances 0.000 claims abstract description 8
- 229920006255 plastic film Polymers 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
- B65H23/032—Controlling transverse register of web
- B65H23/035—Controlling transverse register of web by guide bars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/24—Registering, tensioning, smoothing or guiding webs longitudinally by fluid action, e.g. to retard the running web
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/10—Handled articles or webs
- B65H2701/17—Nature of material
- B65H2701/175—Plastic
- B65H2701/1752—Polymer film
Definitions
- the present invention relates to film guiding assemblies for guiding plastic film during travel along a desired path.
- Guiding techniques currently used usually comprise a set of rollers which pivot to change the direction of the film.
- this often produces a change in film tension, with resulted tension memory in the film.
- tension memory can cause problems further along the path of travel. For example, if the film is subsequently wound on a roll and the tension of the film during winding is not sufficient, the edge of the roll may follow the film memory so that the roll edges are not straight. Edge guides which utilize such techniques therefore tend to create the same problem which they were designed to eliminate.
- the present invention provides a film guiding assembly for guiding a plastic film during travel along a desired path, the assembly including:
- the film therefore slides over the turning bars.
- the turning bars may be lubricated by a gas such as air for use with sticky films or films with a high coefficient of friction or may have a slippery coating. It has been found that such an arrangement guides a plastic film without causing any substantial additional stress in the film such that, if the film is subsequently wound onto a roll for example, the film in the roll is subsequently without tension memory.
- the actuators may also be operable to move the turning bars to a loading position in which the film can be passed therebetween in a downward direction.
- the guiding assembly may include further actuators operable to permit the turning bars to rotate during a start-up operation.
- FIG. 1 is a diagrammatic side view of a film guiding assembly in accordance with one embodiment of the invention
- FIG. 2 is a diagrammatic front view of the turning bars in a non-angled orientation
- FIG. 3 is a similar view showing the turning bars in a first angled orientation
- FIG. 4 is a similar view showing the turning bars in a second angled orientation
- FIG. 5 is similar to FIG. 1 but shows how the guiding assembly is oriented to initially pass the plastic film therethrough;
- FIG. 6 is a similar view showing the guiding assembly in an intermediate position between the orientation shown in FIG. 5 and the orientation shown in FIG. 1 ;
- FIG. 7 is similar to FIG. 1 but shows how the turning bars can be permitted to rotate during start-up.
- a plastic film 10 passes successively around two non-rotating turning bars 12 , 14 of a film guiding assembly.
- each turning bar 12 , 14 reverses the direction of travel of the film 10 .
- the turning bars 12 , 14 are carried by a pivotable bar carrier 16 .
- the film 10 travels past an edge sensor 18 and then around a pair of guide rollers 20 , 22 .
- the bar carrier 16 is pivotable about an axis 24 by an actuator 26 controlled by an electrical controller 27 which receives an edge position signal from the edge sensor 18 .
- the turning bars 12 , 14 are air lubricated by air blowers 28 , 29 which supply air under pressure through flexible ducts 30 , 32 to the interior of the turning bars 12 , 14 .
- the turning bars 12 , 14 have passages 34 , 35 which feed air from the interior of the turning bars to their surfaces over which the film 10 passes.
- the turning bars 12 , 14 may have low friction surfaces.
- the guiding assembly also includes a pair of actuators 36 , 38 which are operable to permit or prevent rotation of the turning bars 12 , 14 , as will be described in more detail later.
- FIG. 1 shows the guiding assembly in an operative position in which the actuators 36 , 38 are actuated to prevent the turning bars 12 , 14 from rotating, as is the case when film 10 is running through the guiding assembly.
- FIG. 2 shows the turning bars 12 , 14 in a neutral position.
- FIG. 3 shows the turning bars 12 , 14 in a first angled position when it is desired to shift the film 10 laterally by a distance A
- FIG. 4 shows the turning bars 12 , 14 in a further angled position when it is desired to shift the film 10 laterally by a distance B.
- the actuators 36 , 38 are operated to permit the turning bars 12 , 14 to rotate, see FIG. 7 .
- the actuator 26 is operated to cause the carrier 16 to pivot about axis 24 from the position shown in FIG. 1 to the position shown in FIG. 5 .
- the leading end of the film 10 can then easily be pulled downwardly between the turning bars 12 , 14 and passed around rollers 20 , 22 .
- FIG. 6 shows an intermediate position during this operation, during which turning bars 12 , 14 can rotate to facilitate the operation.
- actuators 36 , 38 permit rotation of the turning bars 12 , 14 during start-up, as shown in FIG. 7 .
- actuators 36 , 38 are again actuated to prevent rotation of the turning bars 12 , 14 , as shown in FIG. 1 .
Landscapes
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
Abstract
A film guiding assembly for guiding a plastic film during travel along a desired path includes at least two non-rotating turning bars over which the film passes, and an actuator for pivoting the turning bars to laterally shift the film. A sensor for senses the lateral position of the film downstream of the turning bars and operates to cause the actuator to pivot the turning bars when necessary to maintain the film leaving the guiding assembly in the desired path.
Description
- This application claims priority from U.S. Provisional Patent Application No. 60/903322 filed Feb. 26, 2007.
- The present invention relates to film guiding assemblies for guiding plastic film during travel along a desired path.
- It is frequently necessary to guide plastic film as it travels along a desired path. Guiding techniques currently used usually comprise a set of rollers which pivot to change the direction of the film. However, this often produces a change in film tension, with resulted tension memory in the film. Such tension memory can cause problems further along the path of travel. For example, if the film is subsequently wound on a roll and the tension of the film during winding is not sufficient, the edge of the roll may follow the film memory so that the roll edges are not straight. Edge guides which utilize such techniques therefore tend to create the same problem which they were designed to eliminate.
- The present invention provides a film guiding assembly for guiding a plastic film during travel along a desired path, the assembly including:
-
- at least two non-rotating turning bars over which the film passes;
- an actuator for pivoting the turning bars to laterally shift the film; and
- a sensor for sensing the lateral position of the film downstream of the turning bars and operable to cause the actuator to pivot the turning bars when necessary to maintain the film leaving the guiding assembly in the desired path.
- The film therefore slides over the turning bars. The turning bars may be lubricated by a gas such as air for use with sticky films or films with a high coefficient of friction or may have a slippery coating. It has been found that such an arrangement guides a plastic film without causing any substantial additional stress in the film such that, if the film is subsequently wound onto a roll for example, the film in the roll is subsequently without tension memory.
- The actuators may also be operable to move the turning bars to a loading position in which the film can be passed therebetween in a downward direction. Further, the guiding assembly may include further actuators operable to permit the turning bars to rotate during a start-up operation.
- One embodiment of the invention will now be described, by way of example, with reference to the accompanying drawings, of which:
-
FIG. 1 is a diagrammatic side view of a film guiding assembly in accordance with one embodiment of the invention; -
FIG. 2 is a diagrammatic front view of the turning bars in a non-angled orientation; -
FIG. 3 is a similar view showing the turning bars in a first angled orientation; -
FIG. 4 is a similar view showing the turning bars in a second angled orientation; -
FIG. 5 is similar toFIG. 1 but shows how the guiding assembly is oriented to initially pass the plastic film therethrough; -
FIG. 6 is a similar view showing the guiding assembly in an intermediate position between the orientation shown inFIG. 5 and the orientation shown inFIG. 1 ; and -
FIG. 7 is similar toFIG. 1 but shows how the turning bars can be permitted to rotate during start-up. - Referring to the drawings and as shown in
FIG. 1 , aplastic film 10 passes successively around twonon-rotating turning bars FIG. 1 , eachturning bar film 10. The turningbars pivotable bar carrier 16. After leaving theturning bars film 10 travels past anedge sensor 18 and then around a pair ofguide rollers bar carrier 16 is pivotable about anaxis 24 by anactuator 26 controlled by anelectrical controller 27 which receives an edge position signal from theedge sensor 18. The turningbars air blowers flexible ducts turning bars bars passages film 10 passes. Alternatively, the turningbars actuators 36, 38 which are operable to permit or prevent rotation of theturning bars - The various parts of the guiding assembly referred to above will of course be appropriately secured to a suitable main frame, as will be readily apparent to a person skilled in the art.
-
FIG. 1 shows the guiding assembly in an operative position in which theactuators 36, 38 are actuated to prevent theturning bars film 10 is running through the guiding assembly. -
FIG. 2 shows theturning bars FIG. 3 shows theturning bars film 10 laterally by a distance A, andFIG. 4 shows theturning bars film 10 laterally by a distance B. - When the
film 10 is initially being threaded through the guiding assembly, theactuators 36, 38 are operated to permit theturning bars FIG. 7 . Initially, theactuator 26 is operated to cause thecarrier 16 to pivot aboutaxis 24 from the position shown inFIG. 1 to the position shown inFIG. 5 . As shown inFIG. 5 , the leading end of thefilm 10 can then easily be pulled downwardly between theturning bars rollers - The
actuator 26 is then operated to return thecarrier 16 back to the position showing inFIG. 1 .FIG. 6 shows an intermediate position during this operation, during which turningbars carrier 16 has returned to the position shown inFIG. 1 ,actuators 36, 38 permit rotation of theturning bars FIG. 7 . After start-up,actuators 36, 38 are again actuated to prevent rotation of theturning bars FIG. 1 . - The advantages of the invention and other embodiments thereof will now be readily apparent to a person skilled in the art, the scope of the invention being defined in the appended claims.
Claims (3)
1. A film guiding assembly for guiding a plastic film during travel along a desired path, said assembly including:
at least two non-rotating turning bars over which the film passes;
an actuator for pivoting the turning bars to laterally shift the film; and
a sensor for sensing the lateral position of the film downstream of the turning bars and operable to cause the actuator to pivot the turning bars when necessary to maintain the film leaving the guiding assembly in the desired path.
2. A guiding assembly according to claim 1 wherein the actuator is also operable to move the turning bars to a loading position in which the film can be passed therebetween in a downward direction.
3. A guiding assembly according to claim 1 including further actuators operable to permit the turning bars to rotate during a start-up operation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/907,837 US20080203131A1 (en) | 2007-02-26 | 2007-10-18 | Film guiding assembly |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US90332207P | 2007-02-26 | 2007-02-26 | |
US11/907,837 US20080203131A1 (en) | 2007-02-26 | 2007-10-18 | Film guiding assembly |
Publications (1)
Publication Number | Publication Date |
---|---|
US20080203131A1 true US20080203131A1 (en) | 2008-08-28 |
Family
ID=39714745
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/907,837 Abandoned US20080203131A1 (en) | 2007-02-26 | 2007-10-18 | Film guiding assembly |
Country Status (1)
Country | Link |
---|---|
US (1) | US20080203131A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150232372A1 (en) * | 2012-09-26 | 2015-08-20 | Corning Incorporated | Methods and apparatuses for steering flexible glass webs |
CN107934635A (en) * | 2017-12-13 | 2018-04-20 | 肇庆市宏华电子科技有限公司 | Die Mo mechanisms and folded film machine |
Citations (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3907186A (en) * | 1971-08-03 | 1975-09-23 | Robin Hasler | Film-spreader |
US5108022A (en) * | 1988-05-18 | 1992-04-28 | Man Roland Druckmaschinen Ag | Universal web turning system, particularly for printed webs derived from a rotary web-type printing machine |
US5357859A (en) * | 1992-08-10 | 1994-10-25 | Koenig & Bauer Aktiengesellschaft | Material web turning bar assembly |
US5520317A (en) * | 1993-04-07 | 1996-05-28 | Koenig & Bauer Aktiengesellschaft | Turning bar with selectively openable air discharge openings |
US5823464A (en) * | 1996-05-23 | 1998-10-20 | Bielomatik Leuze Gmbh & Co. | Device for guiding ply webs of paper or the like |
US6013212A (en) * | 1997-06-06 | 2000-01-11 | Macro Engineering & Technology Inc. | Gauge distribution in tubular plastic film with edge control |
US6047922A (en) * | 1996-04-29 | 2000-04-11 | Koenig & Bauer Aktiengesellschaft | Turning-bar arrangement |
US6450382B1 (en) * | 2000-01-05 | 2002-09-17 | Tokyo Kikai Seisakusho, Ltd. | Printing web position adjusting apparatus |
US20030178524A1 (en) * | 2002-03-19 | 2003-09-25 | Newman Lawrence R. | Turning bar assembly for use with a moving web |
US20040021032A1 (en) * | 2002-07-30 | 2004-02-05 | Dominik Berweger | Web expanding device |
US6695250B2 (en) * | 2000-03-22 | 2004-02-24 | Koenig & Bauer Aktiengesellschaft | Device for deflecting a material web |
US20040164477A1 (en) * | 2003-02-25 | 2004-08-26 | Daniel Buri | Device for deflecting a web |
US6902135B2 (en) * | 2002-12-16 | 2005-06-07 | Goss International Americas, Inc. | Device for guiding a web |
US7025303B2 (en) * | 2003-06-17 | 2006-04-11 | Reifenhauser Gmbh & Co. Maschinenfabrik | Turning bar for contactless guidance of a tubular film |
US7143917B2 (en) * | 1999-11-01 | 2006-12-05 | Energy Saving Products And Sales Corporation | Configurable paper transport |
US7311234B2 (en) * | 2005-06-06 | 2007-12-25 | The Procter & Gamble Company | Vectored air web handling apparatus |
-
2007
- 2007-10-18 US US11/907,837 patent/US20080203131A1/en not_active Abandoned
Patent Citations (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3907186A (en) * | 1971-08-03 | 1975-09-23 | Robin Hasler | Film-spreader |
US5108022A (en) * | 1988-05-18 | 1992-04-28 | Man Roland Druckmaschinen Ag | Universal web turning system, particularly for printed webs derived from a rotary web-type printing machine |
US5357859A (en) * | 1992-08-10 | 1994-10-25 | Koenig & Bauer Aktiengesellschaft | Material web turning bar assembly |
US5520317A (en) * | 1993-04-07 | 1996-05-28 | Koenig & Bauer Aktiengesellschaft | Turning bar with selectively openable air discharge openings |
US6047922A (en) * | 1996-04-29 | 2000-04-11 | Koenig & Bauer Aktiengesellschaft | Turning-bar arrangement |
US5823464A (en) * | 1996-05-23 | 1998-10-20 | Bielomatik Leuze Gmbh & Co. | Device for guiding ply webs of paper or the like |
US6013212A (en) * | 1997-06-06 | 2000-01-11 | Macro Engineering & Technology Inc. | Gauge distribution in tubular plastic film with edge control |
US7143917B2 (en) * | 1999-11-01 | 2006-12-05 | Energy Saving Products And Sales Corporation | Configurable paper transport |
US6450382B1 (en) * | 2000-01-05 | 2002-09-17 | Tokyo Kikai Seisakusho, Ltd. | Printing web position adjusting apparatus |
US6820839B2 (en) * | 2000-03-22 | 2004-11-23 | Koenig & Bauer Aktiengesellschaft | Angle bar assembly method for deviating a material web |
US6695250B2 (en) * | 2000-03-22 | 2004-02-24 | Koenig & Bauer Aktiengesellschaft | Device for deflecting a material web |
US20030178524A1 (en) * | 2002-03-19 | 2003-09-25 | Newman Lawrence R. | Turning bar assembly for use with a moving web |
US20040021032A1 (en) * | 2002-07-30 | 2004-02-05 | Dominik Berweger | Web expanding device |
US6902135B2 (en) * | 2002-12-16 | 2005-06-07 | Goss International Americas, Inc. | Device for guiding a web |
US20040164477A1 (en) * | 2003-02-25 | 2004-08-26 | Daniel Buri | Device for deflecting a web |
US7201300B2 (en) * | 2003-02-25 | 2007-04-10 | Wifag Machinenfabrik | Device for deflecting a web |
US7025303B2 (en) * | 2003-06-17 | 2006-04-11 | Reifenhauser Gmbh & Co. Maschinenfabrik | Turning bar for contactless guidance of a tubular film |
US7311234B2 (en) * | 2005-06-06 | 2007-12-25 | The Procter & Gamble Company | Vectored air web handling apparatus |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150232372A1 (en) * | 2012-09-26 | 2015-08-20 | Corning Incorporated | Methods and apparatuses for steering flexible glass webs |
CN107934635A (en) * | 2017-12-13 | 2018-04-20 | 肇庆市宏华电子科技有限公司 | Die Mo mechanisms and folded film machine |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |