Source: https://patents.google.com/patent/GB2226538A/en
Timestamp: 2018-04-23 08:09:20
Document Index: 230603768

Matched Legal Cases: ['arts 16', 'art 18', 'art 16', 'arts 16', 'art 16', 'art 18', 'art 18', 'arts 16', 'arts 16', 'arts 68', 'art 70', 'art 68', 'art 68', 'art 70', 'art 68', 'art 50']

GB2226538A - Pneumatic web feeding - Google Patents
Pneumatic web feeding Download PDF
GB2226538A
GB2226538A GB8922761A GB8922761A GB2226538A GB 2226538 A GB2226538 A GB 2226538A GB 8922761 A GB8922761 A GB 8922761A GB 8922761 A GB8922761 A GB 8922761A GB 2226538 A GB2226538 A GB 2226538A
GB8922761A
GB2226538B (en )
GB8922761D0 (en )
1 Pneumatic Web Feeding This invention relates to feeding web or sheet
material pneumatically.
According to one aspect of the invention there is provided an air mover for producing a stream of air along a guide surface for conveying web or other sheet material along a path adjacent the guide surface, comprising a body having first and second parts, and means for conveying pressure air, said guide surface including adjacent first faces of said parts, each of said parts having a second face which adjoins said first face, said second faces having complementary portions which are sealingly in engagement, at least one of said second faces having a recess which defines with the other of said faces a slot, said slot extending from said pressure air conveying means to said guide surface.
The first and second faces of at least one of said parts may be substantially flat. The first and.second faces of said at least one part may be angularly disposed relative to one another or may be substantially coplanar. The first faces of said first and second parts may be substantially flat and coplanar, or may include portions which are angularly disposed relative to one another. In the latter case the first faces may be substantially flat and define an angular transition in the region of said slot, and/or one of said first faces may include an arcuate portion.
The air pressure conveying means preferably includes a chamber in said body. The chamber may be defined by adjoining sur faces of the first and second parts.
The first and second parts may respectively have further first faces defining a further guide surface and further second faces defining with said further first faces afurther slot, saidfu'rther slot extending from said further guide surface to said air pressure conveying means. The guide surface and said further guide surface may be angularly disposed relative to one another. Thus the air mover f 1 2 JCW/3573 may, in effect, be a composite member incorporating two slots from which air is exhausted from a common chamber.
An air mover according to the invention may be disposed adjacent an arcuate guide path for a web, the guide surface of said body including a portion shaped so as at least partly to conform with the shape of the arcuate guide path. Thus, where the arcuate guide path is defined for example by a roller round which the web passes, the guide surface may have a curvature corresponding with that of the rol 1 er.
According to another aspect of the invention a method of producing a tension in a web of material conveyed along a guide path includes producing air streams having a cumulative tensioning effect on the web by means of a plurality of air movers arranged in series along the path. The air movers may be provided to generate air streams on opposides of a web on the path.
Figure 1 is a side view of a web conveying system incorporating a pluality of air movers, Figure 2 is an enlarged sectional side view of an air mover, Figure 3 is a side view of a part forming an air mover, Figure 4 is a view in a direction of arrow IV in Figure 3, Figure 5 is a side view of another part for forming an air mover.
Figure 6 is a side view in the direction of arrow V1 in Figure 5, Figure 7 is a side view of an air mover incorporating the parts of Figure 3 and 5, Figure 8 is a view in the direction of arrow VIII in Figure 7, Figure 9 is a plan view of the air mover of Figure 7, Figure 10 is a plan view of a guide incorporating air movers in series, 3 JCW/3573 Figure 11 is a side view of the guide of Figure 10, and Figure 12 is a side view of a web conveying system which includes a composite air mover.
Figure 1 shows a web 10 being drawn from a reel 12 with the aid of three pairs of air movers 14 ganged together so that their effect on the web is cumulative.
As shown in Figure 2, each air mover 14 comprises first and second mating parts 16,18, between which is defined an air pressure chamber 20. The part 18 has a recess 22 in an inclinedface 23, the recess extending for part only of the width (i.e. in the direction normal to the plane of the drawing) of the inclined face, so as to define with a similar inclined face 24 of the-part 16 a slot 26 which extends from the chamber 20 to the junction between cop] anar faces 28,30 respectively of the parts 16,18.
Airexhausting through the slot 26 forms a relatively high velocity stream which tends to follow the ace 30, as indicated by the arrow, due to Coanda effect, and to entrain relatively large quantities of ambient air. The combined result is that a substantial conveying force may be applied to a web adjac ent the faces 28,30 by reason of the moving air stream.
As shown by Figure 1, air movers 14 can be disposed opposite each other, acting on opposite sides'of the web 10, and in series.
Figures 3 - 9 show the construction of an air mover 14 in more detail. Figures 3 and 4 show the part 16. The angle between the faces 24 and 28 is 100. Figures 5 and 6 show the part 18 and the extent of the recess 22 in the inclined face 23. The part 18 also includes a threaded bore 32 by use of which the air mover 14 may be mounted on a support structure (not shown). Figures 7,8 and 9 show the completed air mover 14. The parts 16 and 18, which are typically of machined brass or aluminium, are assembled together using a suitable adhesive (e.g. Loctite 495). The bore forming chamber 20 is drilled and reamed with the parts 16,18 clamped together and any burrs which may be formed removed before the parts are finally assembled. Shoulder recesses 34 are formed in the faces 28,30: this to allow mounting of the air mover with the faces 28,30 extending in an aperture in an appropriate guide plate having a thickness corresponding to the depth of the recesses 34 (i.e. so that the faces 4 JCW/3573 28,30 will be flush with the surface of the guide plate).
Typical dimensions of the air mover 14 as shown in Figures 3 - 9 ar e:
Overall length wi dth depth Diameter of bores 20,32 Depth of recess 22 Width of recess 22 43 22 8 4 0.2 mm is I@ II II 23 of Depth of recess forming shoulders 34 0.9 el Figures 10 and 11 show a composite guide plate 40 including two air movers 42 in series. Construction and operation of the air movers 42 are similar to those of the air mover 14. Slots 44 are provided for adjustably mounting the guide plate 40 relative to a web path. One or several plates 40 could be positioned on each side of a web path to provide a web tensioning arrangement similar to that shown in the system of Figure 1. Composite guide plates containing more than two air movers may be provided.
Figure 12 shows a different form of composite air mover 50, in which a cigarette paper web 52 is required to taverse a tortuous path through printing apparatus in a cigarette making machine. The apparatus includes a first drag roller 54 around which the web 52 passes with the aid of an air stream issuingfrom a first slot 56 of the air mover 50. Subsequently, after passing around at least one further roller (not shown) the web 52 returns to pass around a second drag roller 58 with the aid of an air stream issuing from a second slot 60 of the air mover 50. Guide plates 62, 64 are respectively positioned for guiding the web around the rollers 54, 58 downstream of the air mover 50. The slots 56,60 communicate with a common pressure chamber 66.
The construction of the air mover 50 is substantially analogous to that of the air mover 14 but there are two guide surfaces for the two web paths and these surfaces are shaped or angled to correspond with the arcuate path of the web 52. Thus, the air mover 50 has two parts 68,70 and the part 70 has an arcuate guide surface 72 having a radius corresponding to that of the roller 58, which surface 72 tapers towards a flat surface 74 of the part 68. The slot 60 is 1 JCW/3573 formed by a recess in the surface 74. The construction in the region of the roller 54 is slightly different, the part 68 having a flat surface 76 inclined at 100 to a flat surface 78 of the part 70. The sl ot 56 is formed by a recess in the surf ace 78. The part 68 has a further curved surface 80, which allows positioning of the air mover 50 without interference with a pinch roller 82 which may cooperate with the first drag roller 54. Finally, the part 50 is truncated at 84.
6 Cl aims:
JCW/3573 1. An air mover for producing a stream of air along a guide surface for conveying web or other sheet material along a path adjacent the guide surface, comprising a body having first and second parts, and means for conveying pressure air, said guide surface including adjacent first faces of said parts, each of said parts having a second face which adjoins said first face, said second faces having complementary portions which are sealingly in engagement, at least one of said second faces having a recess which defines with the other of said faces a slot, said slot extending from said pressure air conveying means to said guide surface.
3. An ai r m over as cl ai med i n cl ai m 2, wherei n sai d f i rst and second faces of said at least one part are angularly disposed relative to one another.
5. An air mover as claimed in any preceding claim, wherein said first faces of said first and second parts are substantially flat and coplanar.
6. An air mover as claimed in any of claims 1 - 4, wherein said first faces of said first and second parts include portions which are angularly disposed relative to one another.
1 z 1 1 7 JCW/3573 9. An air mover as claimed in any preceding claim, wherein said air pressure conveying means includes a chamber in said body.
10. An air mover as claimed in claim 9, wherein said chamber i defined by adjoining surfaces of said first and second parts.
11. An air mover as claimed in any preceding claim, wherein said first and second parts respectively have further first faces defining a further guide surface andfurther secondfaces defining with said further first faces a further slot, said further slot extending from said further guide surface to said air pressure conveying means.
13. An air mover as claimed in any preceding claim, and means defining an arcuate guide path for a web adjacent said guide surface, said guide surface including a portion shaped so.as at least partly to conform with the shape of said guide path defining means.
14. An air mover as claimed in claim 13, wherein said portion of said guide surface has a curvature corresponding with that of said guide path defining means.
15. Apparatus including a plurality of air movers as claimed in any preceding claim, said air movers being arranged in series so that the respective guide surfaces define a common path for a run of a web and such that each air mover may impart cumulative tension to the run of a web on said path.
17. A method of producing tension in a web of material conveyed i 1 8 JCW/3573 j 9 along a guide path, in which a plurality of air movers are arranged in series along said path so as to produce air streams having a cumulative tensioning effect on said web.
18. A method as claimed in claim 17, wherein air movers are provided to generate air streams on opposite sides of a web on said guide path.
19. An air mover substantially as herein described with particular reference to Figures 2 - 9, Figures 10 - 11, or Figure 12 of the accompanying drawings.
20. Apparatus for conveying a web, substantially as herein described with particular reference to Figure 1 or Figure 12 of the accompanying drawings.
21. A method of tensioning a web, substantially as herein described with particular reference to Figure 1 of the accompanying drawings.
pubUshed 1990 atThe patent office, State House.68171 High HoIoorn. London WC1R 4TP.Purther ooplesmaybe obtainedfrom Patent Office. Was Branch, St Mary Cray, Orpington, Rent BR5 3RD. Printed by Multlirlex techniques Itd, St Mary Cray, Nent. Con, 1/87
GB8922761A 1988-10-11 1989-10-10 Pneumatic web feeding Expired - Fee Related GB2226538B (en)
GB8823815A GB8823815D0 (en) 1988-10-11 1988-10-11 Pneumatic web feeding
GB8922761D0 GB8922761D0 (en) 1989-11-22
GB2226538A true true GB2226538A (en) 1990-07-04
GB2226538B GB2226538B (en) 1992-12-23
ID=10645018
GB8823815A Pending GB8823815D0 (en) 1988-10-11 1988-10-11 Pneumatic web feeding
GB8922761A Expired - Fee Related GB2226538B (en) 1988-10-11 1989-10-10 Pneumatic web feeding
US (1) US5203485A (en)
GB (2) GB8823815D0 (en)
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WO2010139857A1 (en) * 2009-06-04 2010-12-09 Metso Paper, Inc. Device for transferring a web-like material in a fiber web machine and a fiber web machine
GB9318194D0 (en) * 1993-09-02 1993-10-20 Molins Plc Pneumatic web feeding
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GB8922761D0 (en) 1989-11-22 grant
US5203485A (en) 1993-04-20 grant
GB8823815D0 (en) 1988-11-16 grant
US4106767A (en) 1978-08-15 Conveyor system for flat articles
DE3001531A1 (en) 1981-07-23 Suction conveyor belt for thin sheets - has pattern of raised hollow cylinders projecting from conveying surface, enclosing suction holes
US3976237A (en) 1976-08-24 Web guide systems
US4889269A (en) 1989-12-26 Web center-guiding apparatus
US6186501B1 (en) 2001-02-13 Signature diverter
2000-05-31 PCNP Patent ceased through non-payment of renewal fee