EP0368392A2 - Hochgeschwindigkeitsfaltmaschine für elastisches Bandmaterial - Google Patents

Hochgeschwindigkeitsfaltmaschine für elastisches Bandmaterial Download PDF

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Publication number
EP0368392A2
EP0368392A2 EP89202744A EP89202744A EP0368392A2 EP 0368392 A2 EP0368392 A2 EP 0368392A2 EP 89202744 A EP89202744 A EP 89202744A EP 89202744 A EP89202744 A EP 89202744A EP 0368392 A2 EP0368392 A2 EP 0368392A2
Authority
EP
European Patent Office
Prior art keywords
band
roller
folding machine
rollers
sheet
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.)
Granted
Application number
EP89202744A
Other languages
English (en)
French (fr)
Other versions
EP0368392A3 (en
EP0368392B1 (de
Inventor
Luciano Meschi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Industria Grafica Meschi SRL
Original Assignee
Industria Grafica Meschi SRL
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Industria Grafica Meschi SRL filed Critical Industria Grafica Meschi SRL
Priority to AT89202744T priority Critical patent/ATE88163T1/de
Publication of EP0368392A2 publication Critical patent/EP0368392A2/de
Publication of EP0368392A3 publication Critical patent/EP0368392A3/en
Application granted granted Critical
Publication of EP0368392B1 publication Critical patent/EP0368392B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/20—Zig-zag folders

Definitions

  • the present invention relates to a machine for accordion-like folding bands of not very rigid elastic materials such as paper, paperboard, plastic laminates, metal sheets etc., in layers having all essentially equal length at a very high rate without using particular means by which the spacing between the folds is measured and controlled.
  • This machine is particularly useful in the preparation of paper for high speed printers as an accordion-like folded band to form packages contain­ing a predetermined number of loops , starting from a virgin band rolled up as a coil, as it normally comes from the manufacturing shop.
  • a number of methods and mechanisms is known to accordion like fold a paper band for high speed printers to form packages having desired size containing a paper band having side advancing holes and weakened areas for the tearing at regular intervals.
  • the mostly known comprise the laying down of band loops folded by periodically acting mechanisms such, as helicoidal spirals rotating along their axis, onto a conveying band onto which the package is formed in inclined manner, with the loops flake-wise superimposed, the package being subsequently redressed either manually or by means of any simple mechanism and lastly separated and prepared for the carrying out.
  • cylinders having sucking zones to drag the band paper and funnel shaped guiding means which, by alternatively moving rightwise and leftwise perpendicularly to the ad­vancement direction of the paper, cause the latter two laid down in a zig-zag manner, thus forming the beginning of an accordion like folding.
  • a first purpose of the present invention is that of providing a high speed polding machine for thin bands of elastic materials, such as paper, permitting said bands to be folded in accordion-like manner at very high rate forming packages which are in the already redressed situation and require a minimum of subsequent processing for their final packaging.
  • Another purpose of the present invention is that of preparing packages of paper band accordion-like folded in which the size, both as lenght and as height , may be changed through simple adjustment of components of the folding machine whithout need of substitution of parts.
  • a further purpose of the present invention is that of preparing packages of paper band the size of which may be predetermined in a precise manner, for example, imposing weaking areas at modular spacings in the band, and which remain precise notwithstanding minor size changes of components of the folding machine.
  • the method of the present invention is essentially based on the fact that a paper sheet or a sheet of whatever laminate of similar consistency if advanced up to an obstacle is contacted, begins to take an arc shape , forming a loop increasingly narroever as the sheet is pushed against the obstacle , whereby , if the said loop near the apex thereof is carried by a roller, the peripheral speed of which is higher than the advancing speed of the sheet, and is made to impinge against the fixed obstacle, being engaged with the roller surface so that it cannot be overcome by the sheet, said loop is definitely pinched whereby the sheet takes a straight fold line and subsequently this sharp folding line, by remaining abutted against said obstacle into engagement with the roller acts as a stop whereby the sheet continuously advancing is formed as an arc in the opposite direction with respect to the preceeding one, the loop of which is more and more narrowed, as the sheet advances, being removed from the obstacle until the loop near its apex is carried by a second roller, the peripheral speed of which is higher than
  • a device by which the method of the present invention is embodied con­sists of a supporting plane, above which guiding means are provided for the sheet or band and alternatively guiding said band when it is in­troduced in order to have it inpinging against a first or a second said obstacle each of one limitates one of the two opposite sides of said sup­porting plane, above said first and second obstacle there being provided roller means rotating at a speed such that their peripheral speed is higher than the advancing rate of the band whereby a loop generated in said band owing to the abutting thereof against that of the two obstacle towards which it is initially guided by said guiding means is dragged by that of the roller means opposite with respect to said obstacle against the opposide obstacle which is engaged with said roller means to prevent the band from passing under the same, forming in the band itself a straight and sharp fold which causes the direction of loop formation of the sheet to be inverted, whereby it is brought towards the opposite of said roller means and the forming of said sharp and streight folds is continuously alternated
  • the two said obstacle opposed to the two side of the said supporting plane consists of two substantially U-shaped frames, pivotally connected to the rotation shafts of said roller means and depending therefrom, by which the lower halves of said roller means are encompassed and interposed between said roller means and said supporting plane.
  • the said two frame shaped side obstacles are provided with means prevent­ing the band from entering between themselves and the plane or the roller means consisting of releaved parts engaging corresponding grooves in the same supporting plane and in the roller means.
  • the said releaved parts on said frames consists of parallelepipedal blocks entering the corresponding groups of the supporting plane and of the roller means.
  • Said parellelipipedal blocks are provided with cross cuts giving them a comb appearence.
  • Said roller means are supported by first lever arms having on second arms means adapted to counterweight the weight of said rollers.
  • said means adapted to oppose the weight of said rollers means consists of counterweight giving to said levers counterbalance moments slightly lower than those resulting from the weight of said roller means.
  • said means, adapted to counterbalance the weight of said roller means consist of springs adjusted so that counterbalance moments applied therefrom to said levers are slightly lower than those resulting from the weight of said roller means.
  • said frame shaped obstacle depending from the shafts of said roller means are provided with compression springs keeping said obstacles against a package of accordion like folded band already accumulated therebetween.
  • said frame shape obstacles are furthermore provided with stops preventing them from being removed bejond a certain distance from each other in order to keep constant the longitudinal size of the band lenghts forming the package.
  • the roller which are lifted by the band package being formed thereunder, when attain a certain height actuate controll means which cause the supporting plane on which said accordion like folded band package is formed to be gradually lowered.
  • said controll means consists of at least a microswitch, ac­ tuated by the position taken by at least one of said rollers, controlling a gradual lowering of said supporting plane.
  • said at least one microswitch is actuated by the position taken by one of the arms of one of said levers supporting said rollers.
  • one of the arms of said levers supports a member of adjustable lenght such as a bolt screwed onto a releaved part, which is brought from the position of the levers into engagement with the ac­tuating element of a microswitch.
  • said microswitch can be secured to one arm of said lever and the member of adjustable lenght can be fastened to a releaved part connected to supporting structures of the device.
  • Said guiding means positioned above said supporting plane consists of an assembly comprising at least a pair of moving rollers, tending to be abutted against each other, followed by two planar plates , parallel and spaced by an interval sufficient for the passing of a band to be guided , which can be oriented as desired towards one of the two side obstacle to have the band loop starting at the desired part.
  • said assembly of rollers and parallel plates is housed within a frame supported by a rotation shaft, actuated by motor means, in order to be orientable towards the selected one of the said obstacles.
  • said motor means for the orientation of said frame con­sists of an electromagnetic actuator.
  • said motor means consist of a pneumatic actuator .
  • said motor means cause said guiding means to be oriented for the time necessary to bring the leading end of the band to be folded against the selected said obstacles and then are switched off to permit said guiding means to remain in a central position permitting alternated foldings of said band.
  • the frame supporting the guiding means assembly at least a pair of rollers mutually abutting against each other and driven by a motor at the same peripheral speed as at least two rollers present in the assembly of guiding means.
  • said bands are provided with weakening lines at regular interval or length permitting the folding of said bands in lenghts in all equal to each other with a good tolerance with respect to the position of said ob­stacles and of the above positioned rollers with respect to the support­ing planes.
  • roller means consists of two cylindrical rollers driven in mutually opposed directions, to bring the band against said obstacles, at essentially equal speeds, provided with groups having shapes mating the shape of the combs provided on the obstacles positioned sidewise with respect to the supporting plane, and with areas coated with material pro­moting the adhesion of said band to said rollers.
  • said material promoting the adhesion of the band to the rollers is an elastomeric material such as natural or synthetic rub­ber or flexible plastic materials.
  • a folding machine consists of a supporting frame 10 composed by posts 12, 14, 15 and by cross bars, such as the cross bar 16 with can be seen in the figures 1 and 2, within which a supporting plane 18, two rotating cylindrical roller 20 and 22, two obstacle means 24 and 26 in form of Ushaped frames pivotted around axes 28 and 30 of said respective cylindrical rollers 20 and 22 and interposed with respective cross bars 25 and 27 between said rollers and said supporting plane 18 , are provided.
  • U shaped frame 24 and 26 are provided with releaved parts such as the releaves 32 , 36, and 38 seen in the figures 1 and 2 , or the relieves 36 (a-e) and 38 (a-e) shown in figure 3, engaging cor­responding groups 40, 42, 44 and 46 or 44 (a-e) and 46 (a-e) shown the first ones in figures 1 and 2 and second ones in figure 3.
  • the said supporting plane 18 is mounted to a column 48 which is driven by whatever positioning means 50 to determine the position of the supporting plane 18 with respect to the cylindrical rollers 20 and 22, and to the U shaped frames 24 and 26.
  • the cylindrical rollers 20 and 22 are suspended with respect to the frame 10 and to the supporting plane 18 by means of two double levers 52 and 54 the first arms of which 56 and 58 support for the rotation said axes 28 and 30 of the cylindrical rollers 20 and 22 and are pivotally connected to the axis 60 and 62, from which the second arms 64 and 66, originate provided with counterweights 68 and 70 adapted to counterbalance, at least partially, the weight the cylindrical rollers 20 and 22.
  • the second arm of the lever 52 comprises an adjustment screw or bolt 72 into engagement with a screw threaded hole of a releaved part 74 rigidly connected to said second arm in order to engage a microswitch 76 secured to the post 12 of the frame 10 for the hereinafter described function.
  • the U shaped frames 24 and 26 are pivotally con­nected to the axes 28 and 30 of the cylindrical rollers 20 and 22 but are independent from the first arms 56 and 58 of the levers 52 and 54 from which are kept spaced, further by their weight tending to keep them in the vertical position, also by springs 78 and 80 compression acting bet­ween said first arms 56 and 58 and said U shaped frames 24 and 26, their displacements movements being moreover limited by stopping pins 82 and 84 connected to said frame 10 of the folding machine.
  • the two cylindrical rollers 20 and 22 are driven into rotation according to mutually opposed direction by means, such as electrical motors, 86 and 88 respectively, which through gears 90 and 92 and the transmission means 94 and 96, such as chains or toothed bellts, drive gears 98 and 100 con­nected rigidly to the axis 28 and 30 of said cylindrical rollers 20 and 22.
  • means such as electrical motors, 86 and 88 respectively, which through gears 90 and 92 and the transmission means 94 and 96, such as chains or toothed bellts, drive gears 98 and 100 con­nected rigidly to the axis 28 and 30 of said cylindrical rollers 20 and 22.
  • said means consists of a case 104 containing at least two flanges 106 and 108, a pair of upper pins 110 and 111 to which there are pivoted two pair of arms 112 and 114 supporting to cylindrical rollers 116 and 118 and maintained close to each other by elastic means, such as the spring 120, two planar guide plate 122 and 124 and a shaft 126 for the orientation of the whole case 104, which can be driven into movement by external motor means 128.
  • elastic means such as the spring 120, two planar guide plate 122 and 124 and a shaft 126 for the orientation of the whole case 104, which can be driven into movement by external motor means 128.
  • the two cylindrical rollers 20 and 22, further to have the groups 40 and 44 illustrated in the figure 1 and 2, or the grooves 44 (a-e) shown for the cylindrical roller 22 in figure 3, are provided with areas of greater adherence 136a, 136b, 138a, 138b, 140a and 140 b (all shown in figure 3) which may consist of suitable rubber or plastic material ribbons fixed in proper groups provided in the periphery of cylindrical rollers 20 and 22.
  • the operation of the invention is as follows: when a package of accordion like folded band is to be started, one end of the paper band 102 is directed from the case 104 towards the side of the supporting plane 18 at which the package must be started, for instance the side defined by the U shaped frame 26, by inclining the case 104 with the planar guide plates 122 and 124 directed towards said U shaped frame 26.
  • the end of the paper band 102 is downwardly advanced until it impinges against the supporting plane 18 and, owing to the pushing action of the pairs of the cylindrical rollers 116, 118 and 130 , 132 continues to slide onto said plane until it comes into contact with the cross bar 27 of the frame 26, which cannot be overcome by insertion under, owing to the releaves 38 (a-e), which are particularly shown in figure 3, prevent­ing said band 102 from passing between the crossbar 27 and the plane 18.
  • the band starts taking an arc shape according to an arc 150 which subsequently, owing to the fact that the case 104 leaves the posi­tion of figure 1 to take that of figure 2 with the planar guide plate 122 and 124 taking the orientation shown as 122a and 124a, becomes the loop 150a which, owing to the next advancing of the band, becomes the loop 150b which comes more and more close to the cylindrical roller 20 rotat­ing in the direction indicated by the harrow 21 at a speed such that the peripheral speed of the roller is definitely higher than the advancing rate of the band 102.
  • the loop 150b as a matter of fact is drawn by the roller 20 until it inp­inges against the relieves 32 of the cross bar 25 of the U-shaped frame 24 providing in the band a sharp well flattened fold which , by the way, causes the curvature of the loop 150b to be inverted , being transformed into the arc 160 shown in figure 2.
  • the lenght said of the package 166 and defined by the distance between the cross bars 25 and 27 of the U shaped frames 24 and 26 are kept essentially constant on the whole package since, allthough the rotation of the level 52 and 54 in order to raise the rollers 20 and 22 should cause the two U shaped frames 24 and 26 to be removed from each other, however the action of the compression springs 78 and 80 compensate said removal and lastly the presence of the stopping pins 82 and 84 finally limits the displacement outwardly of the U shaped frames 24 and 26.
  • the said package 166 grows by occuping the space between the rollers 20 and 22 and the supporting plane 18 and , when said space is fully oc­cupied, owing to the fact that the band is continuously drawn under the two said rollers 20 against the cross bars 25 and 27, the package causes the rollers 20 and 22 to be raised the counterweight 68 and 70 provided on the supporting levers 52 and 54 counterbalancing the rollers 20 and 22.
  • the height of said packaged 166 increases until the screw 72 screwed within a relief 74 rigidly connected to the arm 64 of the lever 52 ac­tuates the microswitch 76 thus controlling positioning means 50 by which the supporting column 48 of the supporting plane 18 is gradually lowered whereby a further growth of the package 166 is permitted.
  • the growth of the package 166 is continued until, in any manner, it is completed and consequently the band 102 is cut whereby its folding to form said packages is stopped.
  • the packaged 166 once completed, is removed from the supporting plane 18 and delivered to further packaging processing, for the storage or delivery.
EP89202744A 1988-11-07 1989-10-31 Hochgeschwindigkeitsfaltmaschine für elastisches Bandmaterial Expired - Lifetime EP0368392B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89202744T ATE88163T1 (de) 1988-11-07 1989-10-31 Hochgeschwindigkeitsfaltmaschine fuer elastisches bandmaterial.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2253688 1988-11-07
IT8822536A IT1227467B (it) 1988-11-07 1988-11-07 Piegatrice ad alta velocita' di nastri di materiali elastici.

Publications (3)

Publication Number Publication Date
EP0368392A2 true EP0368392A2 (de) 1990-05-16
EP0368392A3 EP0368392A3 (en) 1990-06-06
EP0368392B1 EP0368392B1 (de) 1993-04-14

Family

ID=11197559

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89202744A Expired - Lifetime EP0368392B1 (de) 1988-11-07 1989-10-31 Hochgeschwindigkeitsfaltmaschine für elastisches Bandmaterial

Country Status (5)

Country Link
EP (1) EP0368392B1 (de)
JP (1) JP2669508B2 (de)
AT (1) ATE88163T1 (de)
DE (1) DE68905996T2 (de)
IT (1) IT1227467B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992006032A1 (en) * 1990-10-03 1992-04-16 Industria Grafica Meschi S.R.L. Improved sheet stop system in a high speed folding machine for continuous paper band
RU2586906C1 (ru) * 2012-08-03 2016-06-10 Рот + Вебер Гмбх Способ складывания бумаги

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2704502A1 (de) * 1977-02-03 1978-08-10 Walter Wuersch Falz-vorrichtung
GB2177686A (en) * 1985-07-18 1987-01-28 Womako Masch Konstr Apparatus for zig-zag folding of paper webs
DE3708016A1 (de) * 1987-03-12 1988-09-22 Womako Masch Konstr Vorrichtung zum zick-zack-falten einer materialbahn

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2704502A1 (de) * 1977-02-03 1978-08-10 Walter Wuersch Falz-vorrichtung
GB2177686A (en) * 1985-07-18 1987-01-28 Womako Masch Konstr Apparatus for zig-zag folding of paper webs
DE3708016A1 (de) * 1987-03-12 1988-09-22 Womako Masch Konstr Vorrichtung zum zick-zack-falten einer materialbahn

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992006032A1 (en) * 1990-10-03 1992-04-16 Industria Grafica Meschi S.R.L. Improved sheet stop system in a high speed folding machine for continuous paper band
US5284467A (en) * 1990-10-03 1994-02-08 Industria Grafica Meschi Srl Sheet stopping system for a high speed folding machine for a continuous paper bond
RU2586906C1 (ru) * 2012-08-03 2016-06-10 Рот + Вебер Гмбх Способ складывания бумаги

Also Published As

Publication number Publication date
IT1227467B (it) 1991-04-11
JPH02182667A (ja) 1990-07-17
EP0368392A3 (en) 1990-06-06
ATE88163T1 (de) 1993-04-15
DE68905996D1 (de) 1993-05-19
DE68905996T2 (de) 1993-11-04
IT8822536A0 (it) 1988-11-07
EP0368392B1 (de) 1993-04-14
JP2669508B2 (ja) 1997-10-29

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