EP0739710A1 - Glatte Pressplatte für eine Vorrichtung zur Herstellung von Wellepappe - Google Patents

Glatte Pressplatte für eine Vorrichtung zur Herstellung von Wellepappe Download PDF

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Publication number
EP0739710A1
EP0739710A1 EP96105178A EP96105178A EP0739710A1 EP 0739710 A1 EP0739710 A1 EP 0739710A1 EP 96105178 A EP96105178 A EP 96105178A EP 96105178 A EP96105178 A EP 96105178A EP 0739710 A1 EP0739710 A1 EP 0739710A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
machine
shoe
paper
hinge
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
EP96105178A
Other languages
English (en)
French (fr)
Other versions
EP0739710B1 (de
Inventor
Jens Schulz
Nicolaus Goerrissen
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.)
Peters Maschinenfabrik GmbH
Original Assignee
Peters Maschinenfabrik GmbH
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 Peters Maschinenfabrik GmbH filed Critical Peters Maschinenfabrik GmbH
Publication of EP0739710A1 publication Critical patent/EP0739710A1/de
Application granted granted Critical
Publication of EP0739710B1 publication Critical patent/EP0739710B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/2845—Details, e.g. provisions for drying, moistening, pressing
    • B31F1/2877—Pressing means for bringing facer sheet and corrugated webs into contact or keeping them in contact, e.g. rolls, belts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1007—Running or continuous length work
    • Y10T156/1016—Transverse corrugating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1025—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina to form undulated to corrugated sheet and securing to base with parts of shaped areas out of contact

Definitions

  • the present invention relates to a heald press in a so-called single-sided manufacturing machine of corrugated cardboard consisting of a sheet of fluting paper, the crests of which are glued to a first cover sheet.
  • This intermediate carton is also called single-sided.
  • this first cardboard is either directly assembled to a second sheet of outer cover paper to give a cardboard called double-sided, or previously assembled to a second single-sided cardboard to obtain a final cardboard called double-double.
  • the fluting paper is preheated and moistened before passing between two fluted cylinders which are heated with steam.
  • the groove thus formed is held against the lower grooved cylinder by means of combs, or a system for boosting the external environment, or a vacuum system from inside the lower grooved cylinder, the surface of which has communication slots.
  • a glue roller bathed in a glue tank deposits a predetermined amount of glue on the ridges of the grooves.
  • the also preheated cover paper and the flute paper are finally assembled by pressure between the lower fluted cylinder and a support device called a heald press.
  • the most commonly used heald press consists of a smooth cylinder parallel to the lower grooved cylinder against which it is supported.
  • the heald press consists of a cross member held at its ends by lower branches of levers, and the face of which active vis-à-vis the lower grooved cylinder is arcuate in a portion of cylinder of radius equal, or even slightly greater, than that of the grooved cylinder.
  • the edges of the active face can be folded outwards or be completed with deflection rollers to better guide the cover sheet.
  • This cross member can also be hollow for the passage of heating steam. However, less balanced and less rigid than a cylinder, such a cross member can twist and / or warp so that the application pressure is no longer uniform over the entire length of the grooved cylinder. The quality of the gluing is then greatly altered.
  • the heald press consists of an endless band passing between upper and lower rollers situated parallel and close to the lower grooved cylinder, respectively at mid-height and below. This strip is thus in contact with the grooved cylinder on a quarter of the lower periphery.
  • This endless strip can be a thin strip of steel or a carpet of copper, cotton or synthetic fibers.
  • the pressure applied to the sheets by this baler depends on the tension applied to the endless belt. It is then necessary to provide a complex mechanical spacing device for one of the rollers of the endless belt with respect to the other, and this with the possibility of adjusting this high tension to a precise value. Again, it is impossible to guarantee the maintenance of a constant tension throughout the width of the endless belt, therefore of a uniform application pressure of the cover sheet against the flute sheet.
  • the object of the present invention is a baler in a single-sided corrugated cardboard making machine which is more efficient, that is to say which constantly applies over time a uniform pressure over the entire width d a cover sheet joined to a flute sheet passing around the lower fluted cylinder.
  • the healer must allow adjustment to a precise value of the application pressure in order to obtain an effective setting of the adhesive without damaging the sheets.
  • the design of this baler must be relatively simple to ensure reliability of operation over time as well as ease of production and maintenance at reasonable costs.
  • each device since each device includes its shoe with an arcuate surface covering a plurality of grooves and its individual actuator for applying pressure, each of these support devices can effectively trigger the adhesive and correctly assemble the papers by exercising longer in its allocated area a lower but very precise pressure, therefore less damaging to the grooved cylinder and to the carton.
  • the use of a transverse series of separately adjustable devices makes it possible to reliably ensure the application of a uniform common pressure over the entire width of the carton.
  • Each device comprising a lighter force application structure than in the case of a single cylinder or cross member, can carry out faster and better controlled corrections in order to obtain the application of an exactly predetermined pressure.
  • such a series of small support devices reacts more quickly exactly to possible transverse or longitudinal variations in thickness of one or both sheets.
  • the bearing surface of the pads is covered or is made of a smooth and wear-resistant material such as a strip of polished metal: copper or stainless steel, or such as a synthetic material, for example that sold. under the name Teflon.
  • the support device comprises a plate carrying a shoe, this plate being pivotally mounted along its edge lower or higher than the frame of the machine, the other opposite edge being connected by a first hinge to a linear actuator, such as a jack, itself connected to the frame of the machine by a second hinge, this actuator pushing the plate and the pad against the grooved cylinder or withdrawing it. If the shoe is mounted on the plate close to its pivot, then this plate acts as a lever amplifying the force exerted by the actuator which can then safely be undersized for reasons of economy.
  • a linear actuator such as a jack
  • the shoe is an elastomer block whose arcuate bearing surface is covered with a smooth and wear-resistant material.
  • the periphery of the pad and its bearing surface can be square or rectangular oriented in the direction of movement of the papers, these forms being easily achievable. If one wishes to avoid any risk of smearing on the assembled cardboard, one can envisage a diamond shape, the pads being nested thanks to an arrangement according to two superimposed lines; or an alternately oval and thinned shape along the series.
  • the support device comprises a shoe in the form of a strip held at one of its ends by a cross member parallel to the cylinder and fixed to the frame of the machine, and at its other end by a movable cross member secured to a first end of a lever pivoting in its middle and the other opposite end of which is connected by a first hinge to a linear actuator, such as a jack, itself connected to the frame of the machine by a second hinge, this actuator raising or lowering the first end of the lever, which stiffens or releases the strip.
  • a linear actuator such as a jack
  • the strip may be metallic in copper or in polished stainless steel, or woven in metallic fibers, natural or synthetic, such as a mixture of carbon fibers and Teflon.
  • This strip may have a slight longitudinal elasticity. The structure of this device is particularly simple and therefore reliable.
  • the support device comprises a pad with prominent lower and upper edges on which are fixed the two ends of a curved strip, this pad being pivotally mounted along its upper or lower edge on a first half of one arm, the other edge resting on this same half of the arm through an elastic means, such as a spring or a block of elastomer, the end of the other half of the arm being pivotally fixed to the frame of the machine, the first half of the arm being connected by a first hinge to an underlying linear actuator, such as a jack, itself connected to the frame of the machine by a second hinge, this actuator pushing this first half of the arm, therefore the shoe, against the grooved cylinder or withdrawing it.
  • an elastic means such as a spring or a block of elastomer
  • the braking force of the cardboard induced by the friction forces generated at the level of the smoothing press according to the invention is compensated for by the fact that the cardboard is pulled downstream of the grooved cylinder and of the smoothing press by a device tractor, in particular by a grille composed of a tractor cylinder around which the cardboard is wound by contact with its cover paper over at least a third of the circumference, and a radially flexible backing roller in contact with the paper groove.
  • the cover paper is brought to the heald press by an upstream preheating and guide cylinder defining, with the downstream tractor cylinder, a tethering angle (e) of the cover paper, i.e. the angle at the top of the portion of grooved cylinder with which this cover paper is in contact, greater than 30 °. So the tension in the cover paper creates additional application pressure.
  • the bearing surface of the pads is arched at an apex angle corresponding to the angle of tying of the cover paper.
  • the width of the bearing surface is preferably between 100 and 200 mm.
  • the heald press according to the invention can be placed in the downstream part of the contact surface to have at the start up this surface a flexible roller for the first application of the cover paper.
  • the guide cylinder and the flexible roller are replaced by a single smooth cylinder, identical to that used according to the state of the art, but brought close to the grooved cylinder with a clearance just sufficient to ensure a first application of the paper. cover against the groove paper, but with pressure practically negligible.
  • Figure 1 is schematically illustrated in perspective a so-called single-sided manufacturing machine intended for the manufacture of a carton 6 also called single-sided consisting of the assembly of a fluting paper 2 and a cover paper 4. More precisely, the fluting paper 2 arrives from above and travels a first half-turn around an upper fluted cylinder 10. This paper 2 is fluted at the meshing of the upper cylinder 10 with a second fluted cylinder lower 12. The flute paper 2 ′ thus formed is held against this lower cylinder 12 during a second downward half-turn by a device not illustrated which may be combs, an external overpressure created in a coating box or an internal depression in the lower grooved cylinder having radial openings allowing the suction of the paper.
  • a device not illustrated which may be combs, an external overpressure created in a coating box or an internal depression in the lower grooved cylinder having radial openings allowing the suction of the paper.
  • a glue roller 13 illustrated in FIGS. 2 to 4 deposits a line of glue on each groove crest.
  • a cover paper 4 is preheated during its rotation around a cylinder 14 then guided towards the lower part of the lower grooved cylinder 12 so as to arrive well parallel to the groove paper 2 'against which it (4') is finally pressed.
  • a heald press formed, according to the invention, of a lateral series of support groups 30 applies a predetermined pressure necessary and sufficient to on the one hand burst the glue cells and on the other hand maintain firmly the two papers against each other while taking the threads of glue attaching the papers to each other.
  • the outgoing cardboard 6 is pulled downstream by a calender consisting of a traction cylinder 16 surmounted by a flexible support roller 18.
  • the cardboard 6 is thus wound up by its cover paper 4 more solid around the upper half of the traction cylinder 16.
  • This support roller comprises an elastomer periphery connected in its central shaft by a series of longitudinal radial fins also in elastomer, the cross section of which is oblique, or even curved.
  • the heddle press is composed of a series of support groups 30 arranged side by side along the lower downstream part of the grooved cylinder 12.
  • Each group of support 30 first comprises a plate 36 whose lower edge is rotatably mounted by a pivot 38 on the same first cross member secured to the frame of the machine.
  • the upper edges of the plates 36 are each connected to a second common cross member secured to the frame of the machine by means of an associated individual jack 40.
  • Each jack is connected to the bottom cross member by a hinge 44 and to the upper edge of its associated board by a second hinge 42.
  • each tray 36 carries a shoe 32 whose base fixed against the tray has a rectangular shape, the length of which is parallel to the direction of travel of the carton 6.
  • the face 34 located vis-à-vis the grooved cylinder 12 is curved into a portion of cylinder of radius substantially equal to, or even slightly greater than that of this cylinder 12.
  • the active bearing surface 34 pressing the cover paper 4 'against the paper groove 2 ' is preferably a surface having a low coefficient of friction and also a high resistance to wear.
  • this surface can be metallic, polished or a layer of synthetic material such as Teflon.
  • the body of the pad can be metallic, an elastomer block having a relative elasticity is preferred, making it possible to damp any residual vibration due to the speed or to accidental variations in thickness of one or the other of the papers.
  • the rectangular active surfaces 34 side by side together define a support zone in which the pressure can be strong enough to trigger the glue but moderate enough to damage neither the cardboard nor the flutes of the lower cylinder 12. If we fear the formation of possible streaks on the cardboard cover sheet due to possible momentary pressure differences from one support group to another, then we can consider pads whose shape has oblique lateral sides so that the transition from one skate to another is spread over a certain width.
  • pads 35 in the form of diamonds and arranged along two nested lines, or pads 33 side by side with curved lateral edges: these pads alternately having a convex oval and concave thinned shape.
  • pads 33 in the form of diamonds and arranged along two nested lines, or pads 33 side by side with curved lateral edges: these pads alternately having a convex oval and concave thinned shape.
  • We can also consider an S-shaped skate edge.
  • FIG. 2 a second embodiment of support groups 50 is illustrated from the side.
  • This embodiment is based on a shoe taking the form of a curved rectangular strip 58 oriented in the direction of scrolling papers.
  • the lower end of the strip 58 is attached to a first fixed cross member 56 of width equal to that of the strip.
  • the upper end of the strip is fixed to a movable cross member 54 because it is fixed to the end of a first branch of a lever 52 pivoting about an axis located at the end of an upright 51.
  • the opposite end of the second branch of the lever is connected to the frame of the machine by a jack 40 articulated on two hinges: a lower 44 fixed to the ground and an upper 42 fixed to the lever.
  • the lever branch carrying the cross member may have a length of between half and a quarter, preferably one third of the total length of the lever so as to obtain an effect of amplification of force applied by the jack 40 to the strip 58 to stiffen it against the lower grooved cylinder 12.
  • the crosspieces 54 and 56 have rounded upper surfaces so that the ends of the strip 58 are curved towards the 'outside.
  • the length of the strip 58 is substantially equal to the tying arc (e) of the contact surface of the cover paper 4 against the cylinder 12, as defined by the respective positions of the preheating cylinder and guide 14 and of the traction cylinder 16 relative to the lower grooved cylinder 12.
  • FIG. 3 is illustrated a third embodiment of a support group 60 based on an arm 64 movable in rotation around an upper base pivot 66.
  • the lower half of this arm 64 carries a shoe 61 mounted in pivoting around a hinge 65 close to its upper edge, while its lower edge rests on the arm 64 through an elastic means 63 such as a row of springs or a rubber stop.
  • the upper and lower edges of the shoe 61 are formed by transverse protrusions with rounded ends on which the rounded edges are fixed in correspondence with a strip 62 constituting the application surface of the cover paper 4 against the flute paper.
  • the arm 64 is also connected to a cross member of the frame of the machine by a jack 40 articulated on two hinges: a lower 44 and an upper 42.
  • the hinge 42 therefore the point of action of the jack 40, is located substantially in the middle of the pad 61 to push the latter in a balanced manner against the lower grooved cylinder 12.
  • the application strip 62 of this embodiment, as well as the strip 58 of the previous embodiment, are preferably metallic such as copper or polished steel.
  • these bands can also be woven from metallic or carbon-reinforced Teflon or metallic fibers or any other synthetic fiber having a low coefficient of friction and a high resistance to wear.
  • the length of the action of the strip 62 is only a fraction comprised between two thirds and three quarters downstream (e ') of the lashing angle ( e) cover paper 4 against the cylinder 12 as defined by the relative position of the upstream guide roller 15 and downstream traction cylinder 16 relative to this lower fluted cylinder 12.
  • the bursting of the glue cells is performed at this level by a flexible application roller 11, similar to the roller 18, and situated vertically under the grooved cylinder 12.
  • the pressure applied by the support groups 60 is then established at a value just sufficient to ensure the good hold of the cover paper 4 against the groove paper 2 during the setting of the glue.
  • the guide cylinder 15 is smaller than the guide cylinder 14 of the previous embodiment because the preheating is provided by a heating table 17 located upstream.
  • FIG. 4 is illustrated a variant of the embodiment according to FIG. 3 also using a series of supports 60 and in which the guide roller 15 and the heating table 17 are replaced by a smooth cylinder 72 according to the state of the technical.
  • this smooth cylinder is mounted on bearings 72 movable vertically according to a servo (subject to a co-patent application by the holder), this servo-control making it possible to bring this cylinder 70 close to the lower grooved cylinder 12 at a distance (h) exactly predetermined and regulated.
  • This clearance (h) is established so that the smooth cylinder only brings the preheated cover paper 4 into contact with the flute paper 2 and applies a force just necessary to cause the glue cells to burst, but in any case sufficiently low so as not to risk damaging the carton 6 or the splines.
  • an output deflection roller 19 located downstream of the calender made up of the tractor cylinders 16 and 18 increases the angle of attachment of the carton around this tractor cylinder 16 so as to induce in this carton a high tension T generating, at the level of the code take-up contact surface against the lower cylinder 12, a resultant of additional pressure P.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
EP96105178A 1995-04-24 1996-04-01 Pressplatte für eine Vorrichtung zur Herstellung von Wellepappe Expired - Lifetime EP0739710B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1158/95 1995-04-24
CH115895 1995-04-24

Publications (2)

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EP0739710A1 true EP0739710A1 (de) 1996-10-30
EP0739710B1 EP0739710B1 (de) 1998-11-25

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EP96105178A Expired - Lifetime EP0739710B1 (de) 1995-04-24 1996-04-01 Pressplatte für eine Vorrichtung zur Herstellung von Wellepappe

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US (1) US5728256A (de)
EP (1) EP0739710B1 (de)
DE (1) DE69601010T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20120435A1 (it) * 2012-03-20 2013-09-21 Bp Agnati S R L Dispositivo di ondulazione per fogli in materiale cartaceo

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5951816A (en) * 1996-03-26 1999-09-14 Marquip, Inc. Single facer with small intermediate corrugating roll
US6012501A (en) * 1996-03-26 2000-01-11 Marquip, Inc. Single facer with small intermediate corrugating roll and variable wrap arm device
US6149751A (en) * 1996-11-01 2000-11-21 Marquip, Inc. Low pressure single facer
JPH10305498A (ja) * 1997-05-07 1998-11-17 Mitsubishi Heavy Ind Ltd シート張力調整方法
EP2465674B1 (de) * 2010-12-20 2013-09-25 BHS Corrugated Maschinen- und Anlagenbau GmbH Riffel-Walze für die Herstellung von Well-Pappe

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2108378A1 (de) * 1971-02-22 1972-08-31 Eickhoff-Universal Wellpappenmaschinen Gmbh, 4630 Bochum Vorrichtung zum Herstellen von Wellpappe mit doppelseitig glatter Bahn
FR2142591A1 (en) * 1971-06-21 1973-02-02 Roquette Freres Plastics coated press - for surfacing corrugated paper
US4481066A (en) * 1981-05-08 1984-11-06 Mitsubishi Jukogyo Kabushiki Kaisha Single facer
EP0623459A2 (de) * 1993-05-06 1994-11-09 Interfic Developments Incorporated Verfahren und Vorrichtung zur Verbesserung der Gleichmässigkeit der Erwärmung eines Klebestoffes für die Herstellung von Wellepappe
FR2708011A1 (fr) * 1993-07-20 1995-01-27 Otor Sa Machine et procédé de fabrication d'une feuille de carton ondulé simple face.
DE4439875A1 (de) * 1993-11-08 1995-05-11 Isowa Nagoya Kk Einseitenwellpappenmaschine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH563867A5 (de) * 1973-03-01 1975-07-15 Escher Wyss Gmbh
DE2527819A1 (de) * 1975-06-21 1976-12-30 Bhs Bayerische Berg Maschine zur herstellung einseitig beklebter wellpappe
JP2592183B2 (ja) * 1990-12-25 1997-03-19 三菱重工業株式会社 片面段ボール製造機
US5526739A (en) * 1993-09-22 1996-06-18 Corrugated Gear & Services Inc. Apparatus for applying variable pressure to a surface
JPH07308980A (ja) * 1994-05-16 1995-11-28 Isowa Corp 片面段ボール製造装置のベルト蛇行防止装置
DE4420958A1 (de) * 1994-06-16 1995-12-21 Bhs Corr Masch & Anlagenbau Maschine zur Herstellung einer einseitig kaschierten Wellpappebahn

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2108378A1 (de) * 1971-02-22 1972-08-31 Eickhoff-Universal Wellpappenmaschinen Gmbh, 4630 Bochum Vorrichtung zum Herstellen von Wellpappe mit doppelseitig glatter Bahn
FR2142591A1 (en) * 1971-06-21 1973-02-02 Roquette Freres Plastics coated press - for surfacing corrugated paper
US4481066A (en) * 1981-05-08 1984-11-06 Mitsubishi Jukogyo Kabushiki Kaisha Single facer
EP0623459A2 (de) * 1993-05-06 1994-11-09 Interfic Developments Incorporated Verfahren und Vorrichtung zur Verbesserung der Gleichmässigkeit der Erwärmung eines Klebestoffes für die Herstellung von Wellepappe
FR2708011A1 (fr) * 1993-07-20 1995-01-27 Otor Sa Machine et procédé de fabrication d'une feuille de carton ondulé simple face.
DE4439875A1 (de) * 1993-11-08 1995-05-11 Isowa Nagoya Kk Einseitenwellpappenmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20120435A1 (it) * 2012-03-20 2013-09-21 Bp Agnati S R L Dispositivo di ondulazione per fogli in materiale cartaceo

Also Published As

Publication number Publication date
DE69601010D1 (de) 1999-01-07
US5728256A (en) 1998-03-17
EP0739710B1 (de) 1998-11-25
DE69601010T2 (de) 1999-05-27

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