CA2115352C - Corrugated paperboard production and apparatus therefor - Google Patents
Corrugated paperboard production and apparatus therefor Download PDFInfo
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- CA2115352C CA2115352C CA002115352A CA2115352A CA2115352C CA 2115352 C CA2115352 C CA 2115352C CA 002115352 A CA002115352 A CA 002115352A CA 2115352 A CA2115352 A CA 2115352A CA 2115352 C CA2115352 C CA 2115352C
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- Prior art keywords
- tip
- corrugating rolls
- corrugating
- rolls
- meshing
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- 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
- B31F1/2813—Making corrugated cardboard of composite structure, e.g. comprising two or more corrugated layers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
- Paper (AREA)
- Making Paper Articles (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to an im-proved method arid apparatus for produ-cing paper board structures wherein two corrugated mediums are bonded together at their flute tips. End gears (16a, 16b, 15a, 15b) are provided, at least, on the ends of the corrugating rolls (4, 6) which provide tip tip bonding. The end gears may be abutting or non abutting and may be pro-vided on both ends of the corrugating rolls, which assist tip to tip bonding.
Description
dV0 93!1)595? ~ ~ ~ ~ ~ ~ ~ PCT/A~L192/00486 T D ~P~RDOARD R ~i()N AND APPARATUS TI~EREFQR
This invention relates to improved methods of and apparatus for forming paper board structures in which two corrugated mediums are bonded together at their flute tips. A structure of this kind is disclosed in Australian Patent 567833 which is incorporated herein by reference.
One apparatus for forming such corrugated board structures is disclosed in Australian Patent No. 609089 (17926188) which is also incorporated herein by reference. Additionally there are variations of the basic apparatus as is currently disclosed in Australian Patent No. 615,053 which discloses the 4-roll apparatus i 0 wherein one of the corrugating rolls functions also as a carrier roll which transfers the bonded mediums to the liner bonding zone and also US Patent No. 4,935,082 which replaces the carrier roll with the toothed belt. The invention as described and defined herein is equally applicable to the variations of the basic apparatus; wherein flute tip to flute tip bonding is required.
One of the major difficulties of producing a paper board structure wherein two corrugated mediums are adequately bonded together at their flute tips, is accurately aligning the peak of the flutes of the corrugated medium along the entire width of the corrugated mediums. The problem arises from the fact that pressure between the flute tips along their entire length causes misalignment thereof.
This invention relates to improved methods of and apparatus for forming paper board structures in which two corrugated mediums are bonded together at their flute tips. A structure of this kind is disclosed in Australian Patent 567833 which is incorporated herein by reference.
One apparatus for forming such corrugated board structures is disclosed in Australian Patent No. 609089 (17926188) which is also incorporated herein by reference. Additionally there are variations of the basic apparatus as is currently disclosed in Australian Patent No. 615,053 which discloses the 4-roll apparatus i 0 wherein one of the corrugating rolls functions also as a carrier roll which transfers the bonded mediums to the liner bonding zone and also US Patent No. 4,935,082 which replaces the carrier roll with the toothed belt. The invention as described and defined herein is equally applicable to the variations of the basic apparatus; wherein flute tip to flute tip bonding is required.
One of the major difficulties of producing a paper board structure wherein two corrugated mediums are adequately bonded together at their flute tips, is accurately aligning the peak of the flutes of the corrugated medium along the entire width of the corrugated mediums. The problem arises from the fact that pressure between the flute tips along their entire length causes misalignment thereof.
2 0 The present invention is predicated on the discovery that the problem of maintaining the corrugating rolls flute tip to flute tip arises from the fact that the entire board making apparatus can generally lack rigidity. It is thought that the lack of rigidity is mainly attributable to the lack of rigidity in the support frame and also in the corrugating rolls and shafts which twist during operation. Thus as a result of movement a 5 of the corrugating rolls and the frame the flute tips of the rolls become misaligned.
The prior art has dealt with the problem of aligning intermeshing corrugating rolls as distinct from the problem of maintaining alignment of corrugating rolls which contact flute tip to flute tip. Indicative of the prior art is US Patent No.
4196046 which discusses the .problem of aligning intermeshing corrugating rolls to adjust the clearance
The prior art has dealt with the problem of aligning intermeshing corrugating rolls as distinct from the problem of maintaining alignment of corrugating rolls which contact flute tip to flute tip. Indicative of the prior art is US Patent No.
4196046 which discusses the .problem of aligning intermeshing corrugating rolls to adjust the clearance
3 0 between the flutes. The patent describes the use of a pair of meshing helical gears with an axial adjuster attached to one of the gears in order to adjust the clearances between the flutes of the intermeshing corrugating rolls. Since the clearance between the intermeshing rolls can be adjusted, wear and tear on the machine is reduced as well as fracturing of the paper web due to clearance deterioration.
~V~ 9~/OS9S7 PCI'/AU92/00485 ~1':~~~~
If is an object of this invention to improve and overcome at least same of the problems of the apparatus disclosed in AU 609089 and variations of the same as previously discussed and discussed in Patents AU615,053 and US4,935,082 and thus improve the quality of the paper board product and the efficiency of the process.
This invention provides an improvement in the basic apparatus and also the variations of the same as previously discussed.
The invention therefore provides a ~rrugated board making apparatus capable of forming corrugated boards having two fluted mediums bonded together at the flute tips, comprising two pairs of corrugating rolls synchronised so that the two fluted mediums 1 0 are oriented for precise flute tip to flute tip bonding, wherein cooperating end gears are provided on the corrugating rolls which orientate the fluted mediums for flute tip to flute tip bonding.
In particular, the end gears are provided specifically on the corrugating rolls which co-operate tip to tip and bring the corrugated mediums together for tip to tip bonding.
More preferably, a set of end gears is fitted to each end of the said corrugating rolls.
The provision of the co-operating end gears advantageously aids in maintaining identical surface speed at the tips of the flutes to be bonded, thus resulting in the precise 2 0 alignment of the corrugating rolls to each other. Thus the alignment of the flute tips of the respective corrugated mediums is achieved, which is essential in order to obtain consistent enhancement of board performance and maximum reduction in medium and liner weights. The benefits of providing this type of board structure are set out in Australian Patent No. 567,833.
2 5 ' End gears are preferably but not essentially fitted to each end of each pair of central corrugating rolls and consist of one full face gear and one split face gear to allow adjustment of backlash.
It is apparent that the prior art apparatus does not discuss or even suggest the possibility of using end gears in relation to the bonding together of corrugated mediums 3 D at their flute tips which align and bond. The prior art is only concerned with the actual corrugating process and intermeshing corrugating rolls.
The end gears are preferably abutting end gears and are preferably installed a short distance from the grooved face of each corrugating roll advantageously assisting in reducing the twisting of shafts. The use of abutting end gears allows the use of 3 5 conventional vacuum corrugating rolls with standard sued trunnions and minimises the .
~V~ 9/05957 PCI'lALJ92100~6 ?~~~J.~~
torsional deflection which generally occurs. By providing abutting end gears to both ends of the corrugating rolls the general rigidity of the apparatus and the reduction in the twisting of the shafts is further enhanced.
The end gears may be non-abutting end gears or can be fitted outside the vacuum collectors and also outside the machine frames. Non-abutting gears can be used when the corrugating rolls have larger trunnions and thus the ability to resist the high torsional stresses arising from the point to point pressure occasioned during the tip to tip bonding process.
The end gears are preferahly precision ground so that the intermeshing is precise.
The end gears can be spur gears or helical gears.
The gears may be split. If there are gears provided at each end they are preferably split at each end. The split gear may then mate with a gear of larger face width on the other corrugating roll. This arrangement assists in taking up backlash and 1 5 allows transmission of at least 50% of the applied torque, thus preventing, further the twisting of the corrugating rolls and shafts.
lNhen the helical gears are used as abutting end gears, the fitting of shims between the end faces of the corrugating rolls and the helical gears may be required when the helical gears are adjusted axially.
2 0 If helical gears are fitted to both ends of the roil, the helices on each gear can be opposing to ensure thrust forces cancel each other out. If helical gears are only fitted to one end, additional thrust bearing capacity may be required to counteract the axial thrust created by the helical gears and prevent twisting of the corrugating rolls and shafts out of tip to tip alignment.
~, 5 ~ A preferred embodiment of this invention will now be described with reference to the drawings:
Figure 1 shows a schematic view of a single facer unit of the kind disclosed in Australian Patent No. 609089.
Figure 2,shows a cross-section view of the corrugating rolls with abutting end 3 0 gears attached.
Figure 1 illustrates a single facer unit of the kind disclosed in Australian Patent No. 609089. The corrugating medium, 1 and 2, maintained on mill roll stands (not shown) and generally passed over a preheater (not shown) is fed onto one (items 3 and ~) of a pair of corrugating rolls, 3 and 4 and ~ and 6. The medium, 1 and 2, is 3 5 corrugated and then adhesive is applied to at feast one of the surfaces of 1 or 2, by an CVO 93dQ5957 PCTdAdJ92d0043b ~l~r~~~~ 4 adhesive station 7. The corrugated medium, 1 and 2, is then joined together flute tip to flute tip, when brought together by corrugating rolls 4 and 6. The two combined corrugating mediums are fed onto the carrier roll 12 and after glue is applied to the flute tips, they are transported to the bonding zone wherein the liner 9 is brought into contact with the flute tips and heat applied by heater 11. The carrier rolls 12 then transports the combined liner and mediums to a point where the product is fed into an inclined transport conveyor t 4 for discharge on to the corrugator bridge.
In accordance with variations of the basic apparatus, it is noted that the carrier roll t 2 can be substituted with a toothed belt.
1 0 Figure 2 illustrates an embodiment of the present invention, wherein end gears 15A and 15B and 16A and 16B are fixed to the corrugating rolls 4 and 6 of the single facet unit which are the corrugating rolls which align and bond the corrugated medium in flute tip to flute tip arrangement. This embodiment illustrates the use of the split spur gears t 5A and 15B and 16A and 16B abutting the corrugating rolls 4 and 6. It 1 5 should be noted that in order to maximise the rigidity of the apparatus and the reduction of twisting in the aligning corrugating rolls, end gears should be placed at each end of the aligning corrugating rolls. The end gears 15A and 15B and 16A and 16B in this embodiment fit within the space between the vacuum collector 17 and the corrugating rolls 6 and 4. It should be noted that if repetitive wear patterns on the corrugating rolls 2 0 are not acceptable, space can be allowed so ail four corrugating rolls may be able to move axially relative to each other. The vacuum collectors 17 and connections therefrom to the corrugating rolls 4 and 6 can pass through the end gears 15A, 158, 16A and 16B to communicate with the corrugating rolls 6 and 4. The vacuum collectors 17 are spring loaded by spring arrangement 19 to ensure a secure but resilient contact between the 25 end-gears (15A, 15B, 16A and 16B) and the vacuum collector system 17.
The end gears need not always abut the corrugating rolls and this is dependent on the diameter of the corrugating rolls with larger diameter shafts. In larger diameter rolls, which can be used when flutes of greater height and tower flute pitch are required, the end gears need not abut the rolls and can be even housed outside of the main housing.
3 0 Furthermore, when vacuum is not used to assist in retaining and carrying the cardboard on the corrugating roll and the alternative fingers are used, it is possible to separate the end gears away from the corrugating rolls, since larger rolls can be used.
In order to produce a particular flute, for example Thai disclosed in Australian Patent No. 567$33, the diameter of the corrugating rolls and shafts may be limited in WO 33/05957 PCf'/AtJ32/004t36 ~~.~~~~2 _ order to produce the desired flute pitch and depth. tn these cases ii may be necessary to abut the end gears in order to maximise the rigidity of the apparatus.
Furthermore, the face width of split spur gear 16A is extended to assist in taking up backlash and allow transmission of the applied torque. Generally the face width of the 5 end gears is governed by the braking torque required which as a general rule is at least three (3) times the drive torque created. End gear 16A and 16B is driven by its cooperation with end gears 15A and 15B and drives the carrier roils 12 via a ring gear (not shown) attached to the carrier roll 12. Similarly the end gears can drive a toothed belt if used.
1 0 The end gears 15A and 15B and 16A and 16B may be fixed to the shafts of the corrugating rolls 4 and 6 by any locking assembly, for example mufti-taper lock sleeves, stem 21. The only requirement of the locking assembly is that the gears are precisely retained in position to transmit high peripheral forces without circumferential movement.
To secure the split gears 15A and 15B to each other fixing screws 20 may be used which also allow for adjustment of the gears relative to each other in order to reduce backlash. Similarly fixing screws 20 can also be incorporated on split gears 16A
and 168. The end gears 15A, 15B, 16A and 163 depending on their proximity to the corrugating rolls may have a shroud (not shown) shielding the board being processed and 2 0 preventing entanglement of the board in the rotating end gears.
It is noted that whilst the end gears must be applied to at least the corrugating rolls which are directly involved in flute-tip to flute-tip bonding, end gears can be applied to other rolls such as carrier rolls, or toothed belt mechanisms.
The frame 18 may also be reinforced and/or improved in order to increase frame z 5 rigidity and thus generally greater apparatus rigidity.
The above improvements to existing machinery, aid and assist in providing a better board product, and produces the board product more efficiently resulting in reduced machine wear and raw material use.
~V~ 9~/OS9S7 PCI'/AU92/00485 ~1':~~~~
If is an object of this invention to improve and overcome at least same of the problems of the apparatus disclosed in AU 609089 and variations of the same as previously discussed and discussed in Patents AU615,053 and US4,935,082 and thus improve the quality of the paper board product and the efficiency of the process.
This invention provides an improvement in the basic apparatus and also the variations of the same as previously discussed.
The invention therefore provides a ~rrugated board making apparatus capable of forming corrugated boards having two fluted mediums bonded together at the flute tips, comprising two pairs of corrugating rolls synchronised so that the two fluted mediums 1 0 are oriented for precise flute tip to flute tip bonding, wherein cooperating end gears are provided on the corrugating rolls which orientate the fluted mediums for flute tip to flute tip bonding.
In particular, the end gears are provided specifically on the corrugating rolls which co-operate tip to tip and bring the corrugated mediums together for tip to tip bonding.
More preferably, a set of end gears is fitted to each end of the said corrugating rolls.
The provision of the co-operating end gears advantageously aids in maintaining identical surface speed at the tips of the flutes to be bonded, thus resulting in the precise 2 0 alignment of the corrugating rolls to each other. Thus the alignment of the flute tips of the respective corrugated mediums is achieved, which is essential in order to obtain consistent enhancement of board performance and maximum reduction in medium and liner weights. The benefits of providing this type of board structure are set out in Australian Patent No. 567,833.
2 5 ' End gears are preferably but not essentially fitted to each end of each pair of central corrugating rolls and consist of one full face gear and one split face gear to allow adjustment of backlash.
It is apparent that the prior art apparatus does not discuss or even suggest the possibility of using end gears in relation to the bonding together of corrugated mediums 3 D at their flute tips which align and bond. The prior art is only concerned with the actual corrugating process and intermeshing corrugating rolls.
The end gears are preferably abutting end gears and are preferably installed a short distance from the grooved face of each corrugating roll advantageously assisting in reducing the twisting of shafts. The use of abutting end gears allows the use of 3 5 conventional vacuum corrugating rolls with standard sued trunnions and minimises the .
~V~ 9/05957 PCI'lALJ92100~6 ?~~~J.~~
torsional deflection which generally occurs. By providing abutting end gears to both ends of the corrugating rolls the general rigidity of the apparatus and the reduction in the twisting of the shafts is further enhanced.
The end gears may be non-abutting end gears or can be fitted outside the vacuum collectors and also outside the machine frames. Non-abutting gears can be used when the corrugating rolls have larger trunnions and thus the ability to resist the high torsional stresses arising from the point to point pressure occasioned during the tip to tip bonding process.
The end gears are preferahly precision ground so that the intermeshing is precise.
The end gears can be spur gears or helical gears.
The gears may be split. If there are gears provided at each end they are preferably split at each end. The split gear may then mate with a gear of larger face width on the other corrugating roll. This arrangement assists in taking up backlash and 1 5 allows transmission of at least 50% of the applied torque, thus preventing, further the twisting of the corrugating rolls and shafts.
lNhen the helical gears are used as abutting end gears, the fitting of shims between the end faces of the corrugating rolls and the helical gears may be required when the helical gears are adjusted axially.
2 0 If helical gears are fitted to both ends of the roil, the helices on each gear can be opposing to ensure thrust forces cancel each other out. If helical gears are only fitted to one end, additional thrust bearing capacity may be required to counteract the axial thrust created by the helical gears and prevent twisting of the corrugating rolls and shafts out of tip to tip alignment.
~, 5 ~ A preferred embodiment of this invention will now be described with reference to the drawings:
Figure 1 shows a schematic view of a single facer unit of the kind disclosed in Australian Patent No. 609089.
Figure 2,shows a cross-section view of the corrugating rolls with abutting end 3 0 gears attached.
Figure 1 illustrates a single facer unit of the kind disclosed in Australian Patent No. 609089. The corrugating medium, 1 and 2, maintained on mill roll stands (not shown) and generally passed over a preheater (not shown) is fed onto one (items 3 and ~) of a pair of corrugating rolls, 3 and 4 and ~ and 6. The medium, 1 and 2, is 3 5 corrugated and then adhesive is applied to at feast one of the surfaces of 1 or 2, by an CVO 93dQ5957 PCTdAdJ92d0043b ~l~r~~~~ 4 adhesive station 7. The corrugated medium, 1 and 2, is then joined together flute tip to flute tip, when brought together by corrugating rolls 4 and 6. The two combined corrugating mediums are fed onto the carrier roll 12 and after glue is applied to the flute tips, they are transported to the bonding zone wherein the liner 9 is brought into contact with the flute tips and heat applied by heater 11. The carrier rolls 12 then transports the combined liner and mediums to a point where the product is fed into an inclined transport conveyor t 4 for discharge on to the corrugator bridge.
In accordance with variations of the basic apparatus, it is noted that the carrier roll t 2 can be substituted with a toothed belt.
1 0 Figure 2 illustrates an embodiment of the present invention, wherein end gears 15A and 15B and 16A and 16B are fixed to the corrugating rolls 4 and 6 of the single facet unit which are the corrugating rolls which align and bond the corrugated medium in flute tip to flute tip arrangement. This embodiment illustrates the use of the split spur gears t 5A and 15B and 16A and 16B abutting the corrugating rolls 4 and 6. It 1 5 should be noted that in order to maximise the rigidity of the apparatus and the reduction of twisting in the aligning corrugating rolls, end gears should be placed at each end of the aligning corrugating rolls. The end gears 15A and 15B and 16A and 16B in this embodiment fit within the space between the vacuum collector 17 and the corrugating rolls 6 and 4. It should be noted that if repetitive wear patterns on the corrugating rolls 2 0 are not acceptable, space can be allowed so ail four corrugating rolls may be able to move axially relative to each other. The vacuum collectors 17 and connections therefrom to the corrugating rolls 4 and 6 can pass through the end gears 15A, 158, 16A and 16B to communicate with the corrugating rolls 6 and 4. The vacuum collectors 17 are spring loaded by spring arrangement 19 to ensure a secure but resilient contact between the 25 end-gears (15A, 15B, 16A and 16B) and the vacuum collector system 17.
The end gears need not always abut the corrugating rolls and this is dependent on the diameter of the corrugating rolls with larger diameter shafts. In larger diameter rolls, which can be used when flutes of greater height and tower flute pitch are required, the end gears need not abut the rolls and can be even housed outside of the main housing.
3 0 Furthermore, when vacuum is not used to assist in retaining and carrying the cardboard on the corrugating roll and the alternative fingers are used, it is possible to separate the end gears away from the corrugating rolls, since larger rolls can be used.
In order to produce a particular flute, for example Thai disclosed in Australian Patent No. 567$33, the diameter of the corrugating rolls and shafts may be limited in WO 33/05957 PCf'/AtJ32/004t36 ~~.~~~~2 _ order to produce the desired flute pitch and depth. tn these cases ii may be necessary to abut the end gears in order to maximise the rigidity of the apparatus.
Furthermore, the face width of split spur gear 16A is extended to assist in taking up backlash and allow transmission of the applied torque. Generally the face width of the 5 end gears is governed by the braking torque required which as a general rule is at least three (3) times the drive torque created. End gear 16A and 16B is driven by its cooperation with end gears 15A and 15B and drives the carrier roils 12 via a ring gear (not shown) attached to the carrier roll 12. Similarly the end gears can drive a toothed belt if used.
1 0 The end gears 15A and 15B and 16A and 16B may be fixed to the shafts of the corrugating rolls 4 and 6 by any locking assembly, for example mufti-taper lock sleeves, stem 21. The only requirement of the locking assembly is that the gears are precisely retained in position to transmit high peripheral forces without circumferential movement.
To secure the split gears 15A and 15B to each other fixing screws 20 may be used which also allow for adjustment of the gears relative to each other in order to reduce backlash. Similarly fixing screws 20 can also be incorporated on split gears 16A
and 168. The end gears 15A, 15B, 16A and 163 depending on their proximity to the corrugating rolls may have a shroud (not shown) shielding the board being processed and 2 0 preventing entanglement of the board in the rotating end gears.
It is noted that whilst the end gears must be applied to at least the corrugating rolls which are directly involved in flute-tip to flute-tip bonding, end gears can be applied to other rolls such as carrier rolls, or toothed belt mechanisms.
The frame 18 may also be reinforced and/or improved in order to increase frame z 5 rigidity and thus generally greater apparatus rigidity.
The above improvements to existing machinery, aid and assist in providing a better board product, and produces the board product more efficiently resulting in reduced machine wear and raw material use.
Claims (18)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A corrugated board making apparatus capable of forming corrugated boards having two fluted mediums bonded together at the flute tips, comprising two pairs of corrugating rolls synchronised so that the two fluted mediums are oriented for precise flute tip to flute tip bonding between a central pair of non-meshing corrugating rolls, characterised in that the flute tip to flute tip orientation is maintained by the provision of meshing helical or spur end gears mounted on the corrugating roll trunnions and abutting each end of each of said central pair of non-meshing corrugating rolls.
2. A corrugated board making apparatus capable of forming corrugated boards having two fluted mediums bonded together at the flute tips comprising two pairs of corrugating rolls synchronised so that the two fluted mediums are oriented for precise flute tip to flute tip bonding between a central pair of non-meshing corrugating rolls, characterised in that the flute tip to flute tip orientation is maintained by the provision of large diameter trunnions on each of said non-meshing corrugating rolls with meshing helical or spur end gears adjacent each end of each trunnion of said central pair of non-meshing corrugating rolls.
3. The apparatus according to claim 1 or 2, wherein the surface speeds of the corrugating rolls whose flutes are precisely aligned tip to tip are non-meshing have identical surface speeds.
4. The apparatus according to claim 1, 2 or 3 wherein at least one end gear is split.
5. The apparatus according to claim 4, wherein one gear on one corrugating roll has a wider face and the split end gear co-operates with said wider face gear so as to assist in taking up backlash.
6. The apparatus according to any one of claims 1 to 5, which comprises a vacuum collector, a space is provided between said vacuum collector and two corrugating rolls and said end gears are fitted in said space.
7. The apparatus according to any one of claims 1 to 6 which comprises a carrier roll and end gears are also applied to said carrier roll.
8. The apparatus according to any one of claims 1 to 7, wherein the end gears reduce torsional stress in the shafts of the corrugating rolls.
9. A corrugated board making apparatus capable of forming corrugated boards having two fluted mediums bonded together at the flute tips, comprising at least two pairs of corrugating rolls, each having longitudinally extending flutes spaced apart around the periphery thereof, said rolls being mounted on trunnions and wherein a first corrugating roll of one pair of corrugating rolls is arranged so that the flutes of that roll are precisely aligned tip to tip with, and are thus non-meshing with the flutes of a second corrugating roll of another pair of corrugating rolls enabling bonding of the two fluted mediums precisely tip to tip, said first and second corrugating rolls whose flutes are aligned tip to tip being subject to forces tending to cause misalignment of the flutes thereof through torsional flexure of said first and second corrugating rolls, and meshing end gears mounted on said trunnions at and in abutting relation with opposite ends of said first and second corrugating rolls to interconnect opposite ends of said first and second corrugating rolls for synchronous rotation and to resist torsional flexure thereof to ensure that precise alignment of the flute tips of said first and second corrugating rolls and hence precise bonding of the fluted mediums is obtained under static conditions and maintained during commercial production under dynamic conditions when high displacing forces are present.
10. The apparatus according to claim 9 wherein the surface speeds of the corrugating rolls whose flutes are precisely aligned tip to tip are non-meshing have identical surface speeds.
11. The apparatus according to claim 9 wherein the end gears are spur gears or helical gears.
12. The apparatus according to claim 9 wherein at least one end gear is split.
13. The apparatus according to claim 12 wherein one gear on one corrugating roll has a wider face and the split end gear co-operates with said wider face gear so as to assist in taking up backlash.
14. The apparatus according to claim 9 which comprises a vacuum collector, a space is provided between said vacuum collector and two corrugating rolls and said end gears are fitted in said space.
15. The apparatus according to claim 9 which comprises a carrier roll and end gears are also applied to said carrier roll.
16. A corrugated board making apparatus capable of forming corrugated boards having two fluted mediums bonded together at the flute tips, comprising at least two pairs of corrugating rolls having longitudinally extending flutes spaced apart around the periphery thereof, said rolls being mounted on trunnions and wherein a first corrugating roll of one pair of corrugating rolls is arranged so that the flutes of that roll are precisely aligned tip to tip with, and are thus non-meshing with, the flutes of a second corrugating roll of another pair of corrugating rolls enabling bonding of the two fluted mediums precisely tip to tip, said first and second corrugating rolls being subject to forces tending to cause misalignment of the flutes thereof through torsional flexure of said first and second corrugating rolls, and meshing end gears mounted on said trunnions in spaced relation to opposite ends of said first and second corrugating rolls while being substantially rigidly connected to said first and second corrugating rolls to interconnect opposite ends of said first and second corrugating rolls for synchronous rotation and to resist torsional flexure thereof to ensure that precise alignment of the flute tips of said first and second corrugating rolls and hence precise bonding of the fluted mediums is obtained under static conditions and maintained during commercial production under dynamic conditions when high displacing forces are present.
17. An apparatus according to claim 16, wherein said meshing end gears comprise helical hears.
18. An apparatus according to claim 16, wherein said meshing end gears comprise spur gears.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPK8359 | 1991-09-17 | ||
AUPK835991 | 1991-09-17 | ||
PCT/AU1992/000486 WO1993005957A1 (en) | 1991-09-17 | 1992-09-16 | Corrugated paperboard production and apparatus therefor |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2115352A1 CA2115352A1 (en) | 1993-04-01 |
CA2115352C true CA2115352C (en) | 2002-07-16 |
Family
ID=3775684
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002115352A Expired - Fee Related CA2115352C (en) | 1991-09-17 | 1992-09-16 | Corrugated paperboard production and apparatus therefor |
Country Status (17)
Country | Link |
---|---|
EP (1) | EP0604531B1 (en) |
JP (1) | JP3428985B2 (en) |
CN (1) | CN1040407C (en) |
AT (1) | ATE146399T1 (en) |
AU (1) | AU655076B2 (en) |
BR (1) | BR9206502A (en) |
CA (1) | CA2115352C (en) |
DE (1) | DE69216102T2 (en) |
DK (1) | DK0604531T3 (en) |
FI (1) | FI110676B (en) |
HK (1) | HK1005440A1 (en) |
MY (1) | MY107173A (en) |
NO (1) | NO316214B1 (en) |
NZ (1) | NZ244327A (en) |
SG (1) | SG43910A1 (en) |
WO (1) | WO1993005957A1 (en) |
ZA (1) | ZA927074B (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR0183515B1 (en) * | 1995-04-11 | 1999-04-15 | 김승무 | Method and apparatus for multi-layered corrugated card board |
AUPN367095A0 (en) * | 1995-06-20 | 1995-07-13 | Amcor Limited | Corrugated board manufacture |
AU703704B2 (en) * | 1996-03-14 | 1999-04-01 | Orora Packaging Australia Pty Ltd | Improvements in corrugated paperboard machinery |
AUPN865896A0 (en) * | 1996-03-14 | 1996-04-04 | Amcor Limited | Improvements in corrugated paperboard machinery |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB145854A (en) * | 1919-03-29 | 1920-06-29 | William Grant Fiske | Improvements in or relating to corrugated cardboard, strawboard, fibreboard and the like |
US1802522A (en) * | 1926-05-21 | 1931-04-28 | Moll Jacob | Corrugated cardboard |
US2576281A (en) * | 1950-06-09 | 1951-11-27 | Aloysius J Carr | Corrugating machine |
US4196046A (en) * | 1978-06-12 | 1980-04-01 | Weyerhaeuser Company | Adjuster for corrugating rolls |
AU609089B2 (en) * | 1987-02-18 | 1991-04-26 | Amcor Limited | Manufacturing corrugated board |
BR8800608A (en) * | 1987-02-18 | 1988-09-27 | Amcor Ltd | APPARATUS AND METHOD FOR MANUFACTURING CORRUGATED PAPER WITH FACE SINGLE |
CA1312540C (en) * | 1987-12-18 | 1993-01-12 | Peter Gordon Bennett | Forming corrugated board structures |
AU615053B2 (en) * | 1988-03-31 | 1991-09-19 | Amcor Limited | Manufacturing corrugated board |
-
1992
- 1992-09-12 MY MYPI92001638A patent/MY107173A/en unknown
- 1992-09-14 NZ NZ244327A patent/NZ244327A/en not_active IP Right Cessation
- 1992-09-16 WO PCT/AU1992/000486 patent/WO1993005957A1/en active IP Right Grant
- 1992-09-16 ZA ZA927074A patent/ZA927074B/en unknown
- 1992-09-16 AU AU25768/92A patent/AU655076B2/en not_active Ceased
- 1992-09-16 DK DK92920069.9T patent/DK0604531T3/en active
- 1992-09-16 DE DE69216102T patent/DE69216102T2/en not_active Expired - Fee Related
- 1992-09-16 JP JP50473693A patent/JP3428985B2/en not_active Expired - Fee Related
- 1992-09-16 CA CA002115352A patent/CA2115352C/en not_active Expired - Fee Related
- 1992-09-16 SG SG1996004916A patent/SG43910A1/en unknown
- 1992-09-16 EP EP92920069A patent/EP0604531B1/en not_active Expired - Lifetime
- 1992-09-16 BR BR9206502A patent/BR9206502A/en not_active IP Right Cessation
- 1992-09-16 AT AT92920069T patent/ATE146399T1/en active
- 1992-09-17 CN CN92110749A patent/CN1040407C/en not_active Expired - Fee Related
-
1994
- 1994-03-15 NO NO19940923A patent/NO316214B1/en unknown
- 1994-03-16 FI FI941232A patent/FI110676B/en active
-
1998
- 1998-05-27 HK HK98104577A patent/HK1005440A1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP0604531A4 (en) | 1994-08-17 |
CN1040407C (en) | 1998-10-28 |
BR9206502A (en) | 1995-10-17 |
JPH06510494A (en) | 1994-11-24 |
AU2576892A (en) | 1993-04-27 |
NZ244327A (en) | 1994-03-25 |
DE69216102T2 (en) | 1997-07-03 |
NO316214B1 (en) | 2003-12-29 |
FI941232A (en) | 1994-03-16 |
DK0604531T3 (en) | 1997-06-09 |
HK1005440A1 (en) | 1999-01-08 |
JP3428985B2 (en) | 2003-07-22 |
ZA927074B (en) | 1993-03-30 |
NO940923D0 (en) | 1994-03-15 |
FI110676B (en) | 2003-03-14 |
FI941232A0 (en) | 1994-03-16 |
CN1071621A (en) | 1993-05-05 |
MY107173A (en) | 1995-09-30 |
SG43910A1 (en) | 1997-11-14 |
EP0604531A1 (en) | 1994-07-06 |
DE69216102D1 (en) | 1997-01-30 |
WO1993005957A1 (en) | 1993-04-01 |
ATE146399T1 (en) | 1997-01-15 |
AU655076B2 (en) | 1994-12-01 |
CA2115352A1 (en) | 1993-04-01 |
EP0604531B1 (en) | 1996-12-18 |
NO940923L (en) | 1994-03-15 |
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Legal Events
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EEER | Examination request | ||
MKLA | Lapsed |