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Publication numberUS3844189 A
Publication typeGrant
Publication dateOct 29, 1974
Filing dateMay 15, 1973
Priority dateMay 3, 1973
Also published asCA983063A1, DE2322822A1, DE2322822B2
Publication numberUS 3844189 A, US 3844189A, US-A-3844189, US3844189 A, US3844189A
InventorsR Jardine
Original AssigneeReed International Ltd
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Web feeding apparatus
US 3844189 A
Abstract
Web feeding apparatus including a web diverting device which is controllable to cause a free leading end of a web to take a selected one of two alternative paths. The web diverting device comprises a pair of facing surfaces which diverge from each other in the web feeding direction whereby each defines a respective one of the two alternative paths. Air feed devices are arranged to direct a flow of air over either one of said surfaces as selected in the direction of web feed, to draw the web to that surface.
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Description  (OCR text may contain errors)

United States Patent [191 Jardine Oct. 29, 1974 WEB FEEDING APPARATUS 3,236,517 2/1966 Lyman ..271/19sx 75 Inventor: Robert W.Jardine, Stockport, 533;"

England I [73] Assignee: Reed International Limited, Primary Examiner-Willie G. Abercrombie London, England Filed: May 15, 1973 Appl. No.: 360,494

U.S. Cl 83/98, 83/102, 83/402, 226/97, 271/195 Int. Cl B26d 7/06, B65h 17/32 Field of Search 83/98, 99, 102, 402; 226/97; 271/195 References Cited UNITED STATES PATENTS 6/1964 Lyman 271/195 X 8/ 1964 Obenshain 226/97 X CONTROL BOX AIR SUPPLY l l l I l 1 I 54 1 Attorney, Agent, or Firm-Elliott l. Pollock [57] ABSTRACT Web feeding apparatus including a web diverting device which is controllable to cause a free leading end of a web to take a selected one of two alternative paths. The web diverting device comprises a pair of facing surfaces which diverge from each other in the web feeding direction whereby each defines a respective one of the two alternative paths. Air feed devices are arranged to direct a flow of air over either one of said surfaces as selected in the direction of web feed, to draw the web to that surface.

4 Claims, 1 Drawing Figure WEB FEEDING APPARATUS This invention relates to web feeding apparatus and has particular, but not exclusive, application to the feeding of paper webs to winding devices for winding the webs into rolls.

One intended application of the invention is in winding machines for winding wallpaper into standard length rolls for supply to the retail trade. The wallpaper is usually fed as a continuous web to such machines from a large reel and in its feed is severed to form the tail end of one roll and the'leading free end of the next roll. Where the winding machine has a single winding head it is necessary to provide a hold" system for the leading end of the next roll until the winding head is ready to receive it following completion and removal of the preceding roll. This results in a build up of web in the hold" system which has to be eliminated by high acceleration of the winding head at the start of the next winding operation. The high acceleration can lead to damage or breaking of heavy embossed wallpaper and webs of low tensile strength.

As an alternative to the use of a single winding head and a hold system, two winding heads can be used so that at the end of a winding operation on one head the leading free end for the nextroll is diverted to the other winding headto provide in effect an uninterrupted winding operation. in attempting to design a machine to operate in this way considerable difficulties have been encountered in diverting the leading end of the web for the next roll after the severing operation. Attempts have been made to use mechanical fingers and suction rollers for changing the direction of the web. Problems arise in the use of fingers because there is no gap between the severed ends of the web through which fingers can be inserted and it is undesirable to create a gap by removing a transverse strip from the web. The use of suction rollers leads to difficulties in removing the web from the'rollers after it has been diverted and problems arise from windage created by the suction rollers having to rotate at high speeds.

The object of this invention is to provide web feeding apparatus including a web diverting device which does not suffer from the aforesaid disadvantages.

According to this invention there is provided web feeding apparatus including a web diverting device which is controllable to cause a free leading end of a web to take a selected one of two alternative paths, the web diverting device comprising a pair of facing surfaces which diverge from each other in the web feeding direction whereby each defines a respective one of the two alternative paths, and means for directing a flow of air over either one of said surfaces as selected whereby the free leading end of a web passing between the facing surfaces is drawn to the one over which the flow of air is directed.

In accordance with the so-called Coanda effect the air flow will tend to follow the surface over which it is directed and in accordance with well-known fluid flow boundary layer theory (Bernouille Law) the web will be drawn towards the surface over which the air flow is directed because of the drop in pressure between the web and said surface caused by the air flow.

The flow of air provides lubrication between the surfaces and the web and constrains the web to follow the contour-of the plate surfaces.

ln application of the invention to a winding machine having two winding heads and web severing means, the web severing means may operate by passing through the diverting device or the latter may be positioned between severing means and the winding heads.

One embodiment of the invention as applied to a winding machine for wallpaper rolls will now be described by way of example with reference to the accompanying diagrammatic drawing.

The winding machine has two winding heads 1 and 2 of well known construction. The web 40 is fed into the machine overa guide plate 3, then over guide rollers 4 and 5, through nip rollers 6 and 7 and thence through the diverting device 9 to one or other of the winding heads 1 and 2 as will be described.

The diverting device 9 comprises two facing plates 10 and 11 which extend parallel to each other for a length and are then curved to diverge from each other in the direction of web feed. Thus the plate 10 defines the web feed path to the winding head 1 and the plate 11 defines the web feed path to the winding head 2. Associated with the plates 10 and 11 are respective air feed devices 12 and 13 which are located in gaps in the parallel portions of the plates 10 and 11 and have orifices 14 through which air is fed, the orifices being directed so that the air from device 12 flows downwardly over the surface of plate 10 and the air from device 13 flows downwardly over the surface of plate 11 as shown by the arrows.

. A plate 15 of inverted V form is disposed below the plates 10 and 11. One arm 16 of the V converges towards the plate 10 to define with the plate 10 a narrowing guide throat 17 leading to the winding head 1. The other arm 18 of the V similarly defines with the plate 11 a narrowing guide throat 19 leading to the winding head 2.

Severing means in the form of blades 20 and 21 are disposed to pass through transverse gaps in the plates 10 and 11 respectively, at the position where the plates 10 and 11 commence to diverge, to sever the web 40 transversely. The blades 20 and 21 are pneumatically operated through double acting air cylinders 22 and 23 and in their forward projecting position after severing the web, as shown for the blade 20, form a gate closing the adjacent guide throat.

Control means shown diagrammatically by control box 24 in the drawing are arranged to control the air flow from a pressurized supply to the air feed devices 12 and 13 and the air cylinders 22 and 23. Thus the control means comprises a valve arrangement made up of conventional valves and whose inter-relationship will be readily understood from the following description of the operation of the winding machine.

in the situation shown in the drawing the winding of a roll 41 in winding head 1 is just being completed, the severing blade 20 has just been operated to sever the web 40 to produce free leading web end 42 and to close the throat 17 so that leading web end 42 can not enter the throat 17. Also air is flowing over the surface of plate 11 so that the web 40 is drawn towards plate 11 and is thus directed through throat 19 to winding head 2. Once the leading web end 42 has been taken up by winding head 2 so that it is held thereby a control signal from winding head 2 via line 25 to control box 24 causes, after a predetermined time delay controlled by a timing device in box 24, the air supply to air cylinder 22 via line 27 to be switched to the other side of the pistonto cause it and the blade 20 to be retracted.

Upon completion of the winding of the roll in the winding head 2 to a predetermined diameter a signal is passed to the control box 24 from winding head 2 via line 29, to cause the air supply to be connected to air feed device 12 via line 28 so that there is a flow of air over the surface of plate and to be connected via line 30 to air cylinder 23 to cause operation of severing blade 21. This results in severing of the web 40, closure of throat 19 and drawing of the free leading end of the web thus produced towards plate 10 so that it is guided through throat 17 to winding head 1. Thereafter, in a manner corresponding to that previously described, a signal is passed from winding head 1 via line 32 to the control box to cause the air supply to air feed device 12 and air cylinder 23 to be cut off. Severing blade 21 is then retracted by an air supply on the other side of the piston. This is initiated through a timing device as described for air cylinder 22.

Also in a manner corresponding to that previously described, completion of the winding of the roll in winding head 1 causes a signal to be passed from winding head 1 to control box 24 via line 34 causing air to be fed to air feed device 13 and operation of severing blade 21 by air cylinder 21 resulting once again in the situation shown in the drawing.

The diverting device 9 has been found to work satisfactorily using an air pressure supply at about 10 to pounds per square inch, the rate of air flow over each plate 10, 11 being about 1 cubic foot per minute per inch across the plate surface. Thus if the plates 10 and 11 are 24 inches wide and the air feed devices 12 and 13 extend across their full width, each air device 12, 13 would produce an air flow of 24 cubic feet per minute. To achieve this the orifice 14 which would extend as a strip across the width of its associated plate 10, 11, is of the order of .002 inches wide.

I claim:

1. Web feeding apparatus including a web diverting device which is controllable to cause a free leading end of a web to take a selected one of two alternative paths, the web diverting device comprising a pair of facing surfaces which diverge from each other in the web feeding direction whereby each defines a respective one of the two alternative paths, the facing surfaces of the diverting device extending substantially parallel to each other for a length before they commence to diverge, and means for directing a flow of air over either one of said surfaces as selected in the direction of web feed, whereby the free leading end of a web passing between the facing surfaces is drawn to the one of the surfaces over which the flow of air is directed, the means for directing the flow of air over the facing surfaces comprising air feed devices respectively disposed in each of said facing surfaces part way along their substantially parallel portions, and web severing means positioned to sever the web substantially at the commencement of the divergence of said facing surfaces.

2. Web feeding apparatus according to claim 1, wherein the web severing means comprise a pair of web severing blades, each arranged to be moved from an inoperative position behind a respective one of the facing surfaces to a position in which it projects through the facing surface to sever the web.

3. Web feeding apparatus according to claim 2, wherein the diverging portions of said facing surfaces each define together with a further surface a web guiding throat and each of said blades in its projecting position closes the adjacent throat.

4. Web feeding apparatus according to claim 2, wherein control means are provided for controlling the air feed devices and the web severing blades so that upon movement of one blade so that it projects through one of said facing surfaces to sever the web, the air feed device associated with the other surface is caused to supply a flow of air over said other surface.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3136539 *Dec 3, 1962Jun 9, 1964Brooks LymanSheet handling
US3143016 *Dec 28, 1960Aug 4, 1964West Virginia Pulp & Paper CoWebcutting mechanism with forced air work and product transfer means
US3236517 *Mar 23, 1965Feb 22, 1966Lyman BrooksSheet handling apparatus
US3243181 *Dec 23, 1963Mar 29, 1966Pitney Bowes IncSheet handling device
US3648912 *Sep 29, 1970Mar 14, 1972Telex Computer ProductsPneumatic apparatus for incrementally advancing tape
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3986455 *Oct 31, 1974Oct 19, 1976Heidelberger Druckmaschinen AktiengesellschaftSheet guiding drum for printing presses
US4147287 *Jan 5, 1978Apr 3, 1979Crown Zellerbach CorporationReel threading system
US4389868 *Aug 10, 1981Jun 28, 1983The Gillette CompanyApparatus for shearing and coiling strip material
US4508279 *Feb 24, 1983Apr 2, 1985Rengo Co., Ltd.Surface winder
US4736942 *Sep 17, 1986Apr 12, 1988Tex-Nology Systems, Inc.Apparatus for separating moving superposed fabric layers
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US5328136 *Apr 25, 1991Jul 12, 1994Jagenberg AktiengesellschaftMethod and device for positioning the beginning of a web of material, especially a web of paper, against the roll of a winder from below
US6039283 *May 19, 1998Mar 21, 2000Hylsa S.A. De C.V.Thin strip coiling system
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CN101693491BOct 27, 2009Nov 28, 2012天津市天塑科技集团有限公司第二塑料制品厂Full-automatic rolling-up device in production line of plastic sheeting for farm use
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Classifications
U.S. Classification83/98, 83/402, 242/542.2, 242/615.1, 226/97.1, 83/102, 242/532.7, 271/195, 242/526, 242/535, 242/531
International ClassificationB65H19/22, B65H23/24, B65H19/26, B21C47/34
Cooperative ClassificationB65H19/26, B21C47/3475, B65H23/24, B65H2301/448, B21C47/34, B65H19/2238, B21C47/3441
European ClassificationB21C47/34H2, B21C47/34D2, B65H19/22B, B65H19/26, B65H23/24, B21C47/34