EP1399310A1 - Verfahren und vorrichtung zum formen einer längsgewellten bahn - Google Patents
Verfahren und vorrichtung zum formen einer längsgewellten bahnInfo
- Publication number
- EP1399310A1 EP1399310A1 EP02745125A EP02745125A EP1399310A1 EP 1399310 A1 EP1399310 A1 EP 1399310A1 EP 02745125 A EP02745125 A EP 02745125A EP 02745125 A EP02745125 A EP 02745125A EP 1399310 A1 EP1399310 A1 EP 1399310A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- web
- forming
- path
- lines
- cross
- 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
Links
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
- B31F1/22—Making webs in which the channel of each corrugation is longitudinal with the web feed
Definitions
- the invention relates to a method and an apparatus for producing longitudinally corrugated webs.
- Longitudinally corrugated webs can be used to produce web structures in which a gathering of the web at right angles to the direction of transport plays a role. This is the case both in the production of a final shape, for example in the case of corrugated cardboard, and for intermediate shaping steps, for example in the production of honeycomb structures.
- Webs with a wavy cross-section are known in the packaging industry and other branches. These cross sections are characterized by periodically recurring shapes. Such forms can be: sinusoidal lines, lines composed of semicircles, lines composed of circular segments and straight lines, only lines composed of straight lines or other lines.
- Wavy-shaped sheets are used, for example, in the production of corrugated cardboard.
- the corrugated sheet is at least glued with a smooth sheet.
- the resulting composite has high rigidity and strength in relation to the low mass of the material used. Due to the structure, the rigidity of the overall structure is higher in the direction of the wavefront than transversely to it, that is, in the direction of the wave normal.
- corrugation of the web is formed according to the prior art by means of a pair of corrugated rollers.
- the wavefront is always transverse to the direction of web travel.
- corrugated paper has up to 30% better material values in the web running direction than at right angles to it. This is due to the fact that, due to the previous production stages, the fibers are aligned in the direction of the web.
- the track lines on the edges of the track cover a 1% longer distance than those in the middle of the track .
- the usual paper webs cannot compensate for this stretching or compression. They tear or wrinkle.
- the expansion of the forming device becomes too large to be integrated in a technically feasible device, for example in a corrugated cardboard system.
- Level forming that is, forming in which all imaginary path lines running in the direction of the bale are of equal length in the forming area, are theoretically realized using shaped shoulders. Shaped shoulders are used, for example, in tubular bag machines for the production of tubes from flat webs. However, no form shoulder for producing longitudinally corrugated webs has become known.
- DE 20 11 802 B2 discloses a machine for producing a longitudinally corrugated web from sheet material by flat forming.
- the document describes the waveforming in a guide bed for the web, which is alternately designed convex or concave between the inlet and outlet ends in such a way that the imaginary longitudinal lines and the imaginary transverse lines of the web are each of the same length.
- the path is deflected in regions perpendicular to the path in the z direction.
- honeycomb structures are usually produced from webs by cutting and folding (e.g. US Pat. No. 5,894,044)
- the invention DE 197 16 637 provides that a continuously conveyed paper web is gathered laterally in the web running direction in order to produce a longitudinally corrugated web as a preliminary step to the actual honeycomb formation, whereby the longitudinal waves are trapezoidal. Because this too, like Described above, an uneven deformation of the web, the same problems as high web pulling forces, tears and folds will arise.
- the invention has for its object to find a method and devices by means of which a flat, longitudinally conveyed web can be continuously transformed from a straight web cross-section to a web with a wavy cross-section within a relatively short forming area, without the web being closed claim that cracks or folds occur in the web.
- the object is achieved by a method for the continuous shaping of a flat to a longitudinally corrugated web while avoiding wrinkles and
- the method according to the invention is carried out in such a way that the web is continuously spatially guided and deformed in the form of each line in the middle of the web that is intended to run in the direction of transport during the shaping in the shaping region, covering almost the same way that the progressing shaping does not cover the railway lines lying at the edge experience a deflection perpendicular to the railway plane, the maximum value of which is greater the further the respective railway line is from the edge of the railway.
- the length of the track becomes a smaller deflection in one direction by a stronger one
- a global Cartesian coordinate system is defined, the x-direction of which, when the web is undeformed, lies in the direction of the greatest extent of the web and therefore coincides with the direction of transport of the web.
- the y-axis of this coordinate system runs in the width direction of the web, i. H. transverse to the direction of transport, and the z-axis in the thickness direction of the web.
- the origin of the global coordinate system lies in the x direction at the beginning of the forming area, in the y direction at half the width and in the z direction at half the thickness of the web.
- the width of the web is b, the thickness of the web is d.
- the basic idea of the method according to the invention is that all imaginary lines of the web have to travel the same path in the direction of web travel during the forming process in order to prevent compression of the material and the resulting negative effects.
- the decisive factor for the path length involved in the reshaping is or are the path line or path lines most affected by the narrowing of the path from the width of the undeformed path to the width of the corrugated path. This path or lines must travel the furthest distance from the inlet to the forming device to the forming tool. In the case of symmetrical forming, these are the two outermost path lines (path edges). With asymmetrical forming, this only affects one of the two web edges. The length this path line or path lines is referred to as the forming length.
- the forming length is kept constant in that these path lines experience a deflection in the z direction.
- the deflection becomes greater the further the railway line is in the middle of the railway.
- the differences in the lengths of the web lines, which are to be compensated during the shaping by deflection in the z direction, are reduced by a curvature of the web before the web shaping described above.
- the curvature of the web means that the web is deformed by bending about the x-axis in such a way that the cross-sectional area limited by thickness and width is converted from the originally rectangular shape into an arc shape.
- the edge web lines then lie further in the middle of the web and the constriction of the web in the forming area necessary for wave shaping is reduced.
- the curved path may have a semi-circular curvature of the cross-section, i.e. H.
- H the intersection of the ball center surface and the inlet cross-sectional plane of the forming area is an arc.
- Other arch shapes can also be used. Such a curvature can be created, for example, by a shape shoulder.
- the forming is preferably designed so that there is a smooth transition from the non-corrugated to the corrugated structure and the web is stressed as uniformly as possible and not punctually by the forming. This avoids the formation of cracks and folds in the web.
- the web is deformed in such a way that the initially flat central surface of the web becomes a double-curved surface with the properties described below.
- This area is called the forming area in the following.
- the forming area At the end of the process, there is a longitudinally corrugated web.
- the most important property of the forming surface is that each track line has the same length.
- the forming surface can be described as follows: The forming surface is enclosed by four boundary lines, which intersect in pairs at one point. Two opposite boundary lines of this forming surface are of equal length, so that a point of the opposite boundary line can be assigned to each point of the one boundary line.
- boundary lines of the one pair of opposite boundary lines, the web edges can be mapped to one another in the case of symmetrical shaping by mirroring on a plane.
- the boundary lines of the other pair of opposing boundary lines each represent a connection at least approximately in one plane (inlet cross-sectional plane or outlet cross-sectional plane) of two points lying in the respective plane (inlet cross-sectional line or outlet cross-sectional line).
- the inlet cross-sectional plane and the outlet cross-sectional plane are advantageously arranged approximately parallel to one another in space.
- the forming surface extends between them.
- the inlet cross-section line can be straight or curved.
- the outlet cross-section line consists of a plurality of joined, in-plane, straight or curved part lines.
- Each path line lying in the double-curved forming surface which represents the shortest connection of a point of the inlet cross-section line with the corresponding point of the outlet cross-section line in the forming surface, is at least approximately as long as the two web edges.
- each of these railway lines meets the inlet cross-sectional plane and the outlet cross-sectional plane at least approximately perpendicularly.
- a device is used to carry out the method according to the invention, which contains one or more shaped elements for guiding the web to be reshaped, which deflect the web in different directions in the z direction in such a way that the shaping path of all the web lines defined by the shaped elements at least is approximately the same length.
- the web is stored on a supply roll.
- the web is drawn off via a pair of pre-take-off rollers attached between the supply roll and the forming shoulder.
- the balm is fed to the shaping part of the device in the flat state.
- the shaping part of the device can consist of two shaped elements with a flat or curvilinearly delimited entry cross-section line, into which the web enters flat or arched.
- a device for arching the web e.g. B. a form shoulder upstream of the shaped element. If shape elements with a curvilinearly limited entry cross-section line are to be used, a shape shoulder in front of the shape elements can be used to reshape the web from a flat to a curved state.
- the web runs between the form shoulder and a cylinder segment.
- the curved part of the web is supported by the cylinder segment.
- the arch of the web can be dispensed with and the web is conveyed into the forming area in the flat state.
- the web is then felt through a forming gap formed by two shaped elements.
- the areas of the shaped elements that are in contact with the web are designed so that the web conveyed through the gap between them is given a positive guidance in which each web line lying in the web center area and intended in the longitudinal direction of the web in the forming area of the shaped elements is at least approximately the same length , As a result, the web is transported through the gap between the shaped elements with almost no compression or expansion of the material.
- the distortions of the material in the outer layers (z ⁇ O) caused by the non-zero material thickness are negligible.
- the web leaves the shaped element in the corrugated state.
- the web is driven by a pair of main draw-off rollers, the surface of which is already worked into the shape of the corrugated web.
- the forming is carried out by means of form elements attached to both sides of the web.
- these shaped elements are designed as solid bodies, on which the intended forming contour is stamped on the side facing the web in such a way that they form a positive guide for the web to be formed in the installed state.
- the shaped elements are attached in the forming path of the device according to the invention in such a way that the two sides face one another, into which the forming contour is embossed. There is a gap between the mutually facing sides of the shaped elements which is so large that the web can pass through it without obstructions, the web having an undulating cross section Disabilities can happen, the web is given a wavy cross-section.
- the shaped element of the preferred embodiment is a solid body with at least one double-curved functional surface.
- the concrete shape of the functional surfaces inevitably results from the desired shape of the forming surface, i. H. the shape into which the center surface of the web is to be brought during forming.
- the functional surfaces are surfaces that envelop the forming surface from one side in such a way that the vertical distance from the forming surface to the respective functional surface is constant at every point. The minimum dimension for this distance is half the thickness d of the web, if necessary plus an addition for an air gap to reduce friction.
- the friction between the shaped elements and the web can be reduced by friction-reducing measures on the surface of the shaped elements or by constructive measures.
- Friction-reducing measures on the surface can be: use of low-friction molded element materials, use of low-friction surface coatings, use of friction-reducing lubricants such as air, and the incorporation of friction-reducing surface structures.
- Constructive friction-reducing measures can be: sliding elements, such as balls, incorporated in the forming contour, or belts that move with the web.
- the shaped elements can also be designed so that the forming contour itself is formed by the balls or the belts that move along.
- the curvature of the web is always flat when using a shape shoulder - all areas of the web lay at least approximately the same during the forming process
- the shape shoulder of the device according to the invention has in the above an example in the direction of web travel an extent of less than half a meter.
- An essential advantage of the invention is that the forming length remains relatively short.
- the longitudinal corrugating device according to the invention can thus be integrated, for example, into existing corrugated cardboard systems. Furthermore, in the production of corrugated webs using the method according to the invention or with a device according to the invention, both folds due to material compression and cracks due to overstretching are avoided. Sheets manufactured according to the invention have a strength that is optimal in terms of material and structure.
- the method according to the invention and the device according to the invention can also advantageously be used to produce trapezoidal longitudinally corrugated webs as an intermediate stage in the formation of honeycombs.
- FIG. 1 definitions of important parameters
- Fig. 2 examples of possible wave profiles that can be generated with the method according to the invention
- Fig. 3 examples of possible path lines in the forming area
- 7 is a cross section through shaped elements and a web, the surface of the shaped elements in contact with the web being formed by balls embedded in the shaped element
- 8 shows a cross section through shaped elements and a web, the surface of the shaped elements in contact with the web being formed by belts embedded in the shaped element
- FIG. 9 a web forming device according to the invention with shaped elements for shaping a flat web into a web a corrugated cross-section
- FIG. 10 shows a web forming device according to the invention with shaped elements and a shape shoulder for arching a flat web and for subsequent forming into a web with a corrugated web cross section.
- Representation (a) shows a wave profile that consists of a periodically recurring
- Representation (b) shows a profile that resembles the course of a rectangular function.
- Representation (c) shows a profile that resembles the course of a triangular function.
- Representation (d) shows a profile consisting of straight lines and in any order
- Arcs were put together. Such orders can be continued randomly or periodically.
- Fig. 3 shows an example of possible path lines in the forming area.
- Advantageous for an unobstructed material flow and thus for the uncomplicated implementation of the method according to the invention are path line courses whose rise in the area of the inlet cross-sectional plane and the outlet cross-sectional plane is zero, so that the web intersects these planes vertically over their entire width.
- Many specific configurations are possible for this.
- the use of polynomials that are placed in the forming area in such a way that their rise increases has proven to be particularly advantageous the penetration points through the inlet cross-sectional plane and outlet cross-sectional plane is zero.
- the web to be formed is fed into the forming area.
- the web runs flat and perpendicular to the inlet cross-sectional plane (1) into the forming area.
- the inlet cross-sectional plane is parallel to the y-z plane of the global coordinate system.
- the central path surface runs parallel to the x-y plane of the global coordinate system.
- the intersection line between the inlet cross-sectional plane and the web center surface is a straight line. It is called the inlet cross-section line (2).
- the web traverses the cross-sectional planes (7) with the cross-sectional lines (8) and experiences increasing shaping.
- the completely formed web emerges from the forming area vertically through the outlet cross-sectional plane (3) lying parallel to the inlet cross-sectional plane (3).
- the line of intersection between the outlet cross-sectional plane (3) and the middle surface of the web corresponds to the wave profile that was to be impressed on the web. It is called the outlet cross-section line (4).
- the outlet cross-section line (4) is a sinusoidal line.
- the path lines (5) shown in the figure are those lines in the path which lie in the zero crossings (on the antimetric axis) of the sinusoidal outlet cross-section line (4), i. H. which, in the advantageous embodiment of the invention, penetrate the inlet cross-sectional plane 1 and the outlet cross-sectional plane (3) with the same z-coordinate. In this way, a particularly trouble-free flow of material can be achieved.
- the inlet cross-section line and the antimetric axis of the outlet cross-section line (4) have different z coordinates. This allows the horizontal length of the forming area to be reduced.
- the outermost railway lines are the railway edges (6). They are most affected by the reduction in the y-dimension (necking 92) of the web in the forming area.
- all path lines (5) are deflected according to a fifth-order polynomial, which is set so that its rise at the intersection points through the inlet cross-sectional plane and the outlet cross-sectional plane is zero and its amplitude depends on the y-coordinate of the respective gene path line in the inlet cross-sectional plane is dependent, so that the z-deflection of the web edges over the entire length of the forming area is zero, while the web line lying in the middle of the web experiences the greatest deflection in each case.
- a fifth-order polynomial which is set so that its rise at the intersection points through the inlet cross-sectional plane and the outlet cross-sectional plane is zero and its amplitude depends on the y-coordinate of the respective gene path line in the inlet cross-sectional plane is dependent, so that the z-deflection of the web edges over the entire length of the forming area is zero, while the web line lying in the middle of the web experiences the greatest deflection in each case.
- FIG. 5 shows the perspective view of a web in the forming area, which is formed from a straight inlet cross-section line (2) into a curved and then into a wave-shaped outlet cross-section line (4).
- the web runs into a form shoulder and passes through the cross-sectional lines (81).
- the cross-sectional lines (82) further taper the web and shape the wavy cross-section.
- the finished formed web then leaves the forming area with a corrugated outlet cross-section line (4) and constriction (92).
- the shaping in the forming area is effected by shaped elements which are located on both sides of the web and on the side facing the web the shaping surfaces described above are worked out.
- 6 shows a cross section through shaped elements and a web, the surface of the shaped elements in contact with the web being a solid.
- the form elements consist of lower (12) and upper (13). In between is the web (14).
- the surfaces of the lower (12) and upper (13) surfaces facing the web are preferably designed with low friction. This can be achieved by choosing suitable surface materials, but also by adding lubricants, for example air.
- FIG. 7 shows a cross section through shaped elements and a web, the surface of the shaped elements in contact with the web being formed by balls (17) embedded in the shaped element.
- the balls are stored in a lower (15) and upper (16) bowl.
- the track (14) is not in contact with the bearing shells (15, 16), but only with the balls (17). This can reduce the frictional forces.
- FIG. 8 shows a cross section through shaped elements and a web (14), the surface of the shaped elements in contact with the web (14) being formed by belts (18). These in turn are stored in a correspondingly shaped lower (15) and upper (16) bearing shell. In this variant, a relative movement between the web (14) and the deforming belt (18) is largely avoided.
- the friction pairing of belts (18) to bearing shells (15, 16) can be designed to be frictional and wear-resistant with the means generally used in technology. If a withdrawal force is embossed on the belts (18) by suitable means, the web (14) can thus be transported through the forming device without further withdrawal devices.
- FIG. 9 shows a web forming device according to the invention with shaped elements for shaping a straight to a corrugated web cross section.
- the web (14) is stored on a supply roll (19) which it leaves in the flat state (9).
- the flat track (14) is guided into a shaped element formed from a lower (15) and an upper (16) bearing shell and belt (18).
- the areas of the shaped element or the belt (18) which are in contact with the web (14) are designed such that a web surface (20) as shown in FIG. 4 is formed.
- the endless straps (18) are over the back of the lower (15) and upper (16) bearing shell through a front (21) and a rear (22) deflection roller.
- the rear deflecting roller (22) is driven so that both the belts (18) and the web (14) are pulled through the shaped element.
- the web is in the longitudinally corrugated state (36) at the outlet of the shaped element and the rear deflecting roller (22).
- FIG. 10 shows a web-forming device according to the invention with shaped elements and a shape shoulder for shaping a straight web shape into a curved web cross-section and for shaping the curved web cross-section into a corrugated one.
- the web (14) is stored on a supply roll (19) which it leaves in the flat state (9).
- the web is driven by a pair of pre-draw rollers (23).
- the balm is transformed from straight (9) into a curved (10) cross section by means of a shaped shoulder hidden by the curved path in FIG. 8.
- the curved part of the web is supported by means of a cylinder segment (25).
- the web runs through between the form shoulder and the cylinder segment (25).
- the curved path (10, 14) is passed through a shaped element consisting of the lower (12) and upper (13) mold.
- the areas of the shaped element which are in contact with the balm (14) are designed such that a web surface (20) as shown in FIG. 5 is formed.
- the web (14) leaves the shaped element (12, 13) in the corrugated state (11).
- the web (14) is drawn off via a pair of main draw-off rollers (26), in the lateral surfaces of which the shape of the corrugated web (11, 14) is already incorporated.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
- Making Paper Articles (AREA)
- Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10129018A DE10129018B4 (de) | 2001-06-08 | 2001-06-08 | Verfahren, Vorrichtung und Formelement zum Formen einer längsgewellten Bahn |
DE10129018 | 2001-06-08 | ||
PCT/DE2002/002048 WO2003000486A1 (de) | 2001-06-08 | 2002-06-06 | Verfahren und vorrichtung zum formen einer längsgewellten bahn |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1399310A1 true EP1399310A1 (de) | 2004-03-24 |
EP1399310B1 EP1399310B1 (de) | 2008-07-02 |
Family
ID=7688371
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02745125A Expired - Lifetime EP1399310B1 (de) | 2001-06-08 | 2002-06-06 | Verfahren und vorrichtung zum formen einer längsgewellten bahn |
Country Status (7)
Country | Link |
---|---|
US (1) | US20050006816A1 (de) |
EP (1) | EP1399310B1 (de) |
JP (1) | JP2004530581A (de) |
CN (1) | CN1514771A (de) |
AT (1) | ATE399636T1 (de) |
DE (2) | DE10129018B4 (de) |
WO (1) | WO2003000486A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PL2100998T3 (pl) * | 2008-03-11 | 2012-11-30 | Jaervinen Jari | Sposób wytwarzania wyrobu profilowego z materiału włóknistego |
EP3508339B1 (de) | 2008-03-21 | 2023-11-15 | International Paper Company | Verfahren zur herstellung von wellpappe |
US20100028621A1 (en) * | 2008-08-04 | 2010-02-04 | Thomas Timothy Byrne | Embossed fibrous structures and methods for making same |
US20100297395A1 (en) * | 2009-05-19 | 2010-11-25 | Andre Mellin | Fibrous structures comprising design elements and methods for making same |
US8753737B2 (en) | 2009-05-19 | 2014-06-17 | The Procter & Gamble Company | Multi-ply fibrous structures and methods for making same |
US9243368B2 (en) * | 2009-05-19 | 2016-01-26 | The Procter & Gamble Company | Embossed fibrous structures and methods for making same |
ES2819856T3 (es) | 2012-11-01 | 2021-04-19 | Hbk Family Llc | Procedimiento para acanalar una banda en la dirección de la máquina |
GB2515559A (en) * | 2013-06-28 | 2014-12-31 | British American Tobacco Co | Apparatus and method for corrugating sheet material |
US9643812B2 (en) * | 2014-03-06 | 2017-05-09 | The Procter & Gamble Company | Method for pleating or shaping a web |
CN108260852B (zh) * | 2016-12-30 | 2020-12-11 | 中烟机械技术中心有限责任公司 | 皱纹纸预折叠装置 |
IT202000015811A1 (it) | 2020-06-30 | 2021-12-30 | Giorgio Trani | Procedimento per produrre in continuo nastri di materiale fibroso ondulati in direzione macchina. |
CN116552057A (zh) * | 2023-04-05 | 2023-08-08 | 广州市佰仕纸制品有限公司 | 一种双向波纹形包装纸及其制造方法 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1859354A (en) * | 1930-01-15 | 1932-05-24 | F And B Holding Company | Means for forming facing sheets for fabricated laths |
US2182720A (en) * | 1936-10-20 | 1939-12-05 | William H Cannard | Creping method and apparatus |
US2257428A (en) * | 1937-08-04 | 1941-09-30 | Ruegenberg Gottfried | All-around extensible paper |
DE920705C (de) * | 1951-06-28 | 1954-11-29 | Der Maschinenfabrik Von Theodo | Einrichtung zum Herstellen von laengs gewellter Wellpappe |
US2901951A (en) * | 1958-04-15 | 1959-09-01 | Hochfeld Henry | Process and machine for pleating pliable materials |
GB890856A (en) * | 1958-07-08 | 1962-03-07 | Gottfried Ruegenberg | Method of and apparatus for manufacturing longitudinally corrugated webs of paper, carton, cardboard, plastics or the like |
US2960145A (en) * | 1958-07-14 | 1960-11-15 | Ruegenberg Gottfried | Method of and apparatus for manufacturing longitudinally folded or longitudinally arched, particularly longitudinally corrugated webs of paper, carton, cardboard, plastics or the like |
JPS4821676B1 (de) * | 1969-03-12 | 1973-06-30 | ||
US4410316A (en) * | 1982-03-18 | 1983-10-18 | Yoke James H | Method for production of corrugated paper |
US5508083A (en) * | 1993-05-19 | 1996-04-16 | Chapman, Jr.; Francis L. | Machine direction fluted combined corrugated containerboard |
DE19716637A1 (de) * | 1997-04-21 | 1998-10-22 | Pflug Jochen Dipl Ing Fh | Faltwabe und Verfahren zu deren Herstellung |
US5894044A (en) * | 1997-04-21 | 1999-04-13 | The Procter & Gamble Company | Honeycomb structure and method of making |
AU2989899A (en) * | 1998-03-18 | 1999-10-11 | United Container Machinery, Inc. | Lengthwise web corrugator |
-
2001
- 2001-06-08 DE DE10129018A patent/DE10129018B4/de not_active Expired - Fee Related
-
2002
- 2002-06-06 DE DE50212443T patent/DE50212443D1/de not_active Expired - Fee Related
- 2002-06-06 EP EP02745125A patent/EP1399310B1/de not_active Expired - Lifetime
- 2002-06-06 US US10/479,795 patent/US20050006816A1/en not_active Abandoned
- 2002-06-06 AT AT02745125T patent/ATE399636T1/de not_active IP Right Cessation
- 2002-06-06 JP JP2003506706A patent/JP2004530581A/ja not_active Withdrawn
- 2002-06-06 WO PCT/DE2002/002048 patent/WO2003000486A1/de active IP Right Grant
- 2002-06-06 CN CNA028115007A patent/CN1514771A/zh active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO03000486A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2003000486A1 (de) | 2003-01-03 |
DE10129018B4 (de) | 2005-05-25 |
DE50212443D1 (de) | 2008-08-14 |
EP1399310B1 (de) | 2008-07-02 |
JP2004530581A (ja) | 2004-10-07 |
CN1514771A (zh) | 2004-07-21 |
US20050006816A1 (en) | 2005-01-13 |
ATE399636T1 (de) | 2008-07-15 |
DE10129018A1 (de) | 2003-01-02 |
WO2003000486A8 (de) | 2004-01-15 |
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