AU3564302A - Procedure and device for flame-cutting a slab - Google Patents
Procedure and device for flame-cutting a slab Download PDFInfo
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- AU3564302A AU3564302A AU35643/02A AU3564302A AU3564302A AU 3564302 A AU3564302 A AU 3564302A AU 35643/02 A AU35643/02 A AU 35643/02A AU 3564302 A AU3564302 A AU 3564302A AU 3564302 A AU3564302 A AU 3564302A
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- slab
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Description
P/00/011 Regulation 3.2
AUSTRALIA
Patents Act 1990 COMPLETE SPECIFICATION Invention Title: Procedure and Device for Flame-Cutting a Slab The following statement is a full description of this invention, including the best method of performing it known to me: The invention involves a procedure for flame-cutting a parallelepiped slab using one or several oxyacetylene cutting torches and a device for implementing this procedure.
Various oxyacetylene cutting procedures are known to the trade, including, for example, the procedure described in the French patent application whose publication number is 2 746 686. In this procedure, the slab is placed edgewise on a series of feed rollers that carry it forward past an oxyacetylene cutting torch between pairs of loosemounted vertical rollers.
The European patent application number 00202767.0 dated August 4, 2000, describes a procedure for flame-cutting slabs and a device for implementing this procedure. The slabs are slit or cut while lying horizontally or on edge and suspended by means of electromagnets located below the feed rollers.
These procedures and systems present certain drawbacks, such as the treatment of slabs having extreme dimensions (affecting stability when placed on edge) or slabs at high temperatures.
The purpose of the invention is to provide a procedure for flame-cutting slabs and a device for implementing this procedure that do not present these drawbacks.
According to the invention, this objective is met by means of a procedure for flame-cutting a slab using at least one oxyacetylene cutting torch at a workstation, including a step in which the slab and the oxyacetylene cutting torch are moved in relation to each other with the slab lying in cutting position in such a way that its primary plane lies at an angle of-10 to -20' from the vertical plane.
For continuous operation, two workstations are envisioned on the line. At each workstation, the slab is in cutting position and arranged in such a way that its primary plane lies at an angle of-10 to -200 with respect to the vertical plane; each of the workstations is used for loading, flame-cutting and unloading a slab to be cut, and the two workstations are each used to flame-cut slabs in alternating order. Therefore, one of the workstations can be used to load the slab and the other can be used to unload the cut slab, and an additional workstation can be included on the line between these two workstations in order to flame-cut the slab in its position at -10' to -20' from the vertical plane; the slab to be cut is loaded onto the loading workstation and carried from there to 300444AU Patent Specification.doc/iv the aforementioned additional workstation, where it is subjected to the oxyacetylene cutting procedure as it passes, and then to the unloading workstation where the cut slab is unloaded.
The slab can be slit or cut during oxyacetylene cutting as the slab and the oxyacetylene cutting torch are moved relative to each other.
The slabs can be loaded continuously in order to be carried past the oxyacetylene cutting torch and then slit or cut depending on the direction of each slab's movement with respect to the oxyacetylene cutting torch.
According to the invention, the device for implementing the procedure incorporates at least one oxyacetylene cutting torch for flame-cutting a slab by moving the slab and the oxyacetylene cutting torch relative to each other, and a mechanism for holding a slab to be cut such that its primary plane lies at an angle of -10' to -20' with respect to the vertical plane.
The aforementioned mechanism for holding a slab may include rollers placed in bracketed pairs so as to receive and hold the slab to be cut on its edge at an angle of -1 0 to -20' and to form an oblique base plane.
At least one pair of guides, capable of moving in unison along and atop this mechanism's oblique base plane in order to hold a slab, can be included for the purpose of holding an oxyacetylene cutting torch and its associated deburring device and placing them in a desired cutting location along the lengthwise extension of a slab held by the mechanism, in order to hold the slab in place so that it can be flame-cut at the aforementioned desired cutting location.
For continuous oxyacetylene cutting of slabs, the production line can also include a second mechanism for holding a slab so that its primary plane forms this same angle of to -20' with respect to the vertical plane; this second mechanism for holding a slab also includes rollers placed in bracketed pairs so as to receive and hold the slab to be cut on its edge at an angle of-10 to -20' and to form a second oblique base plane. The aforementioned pair(s) of guides, which are capable of moving in unison along and atop the mechanism's oblique base plane in order to hold a slab for the purpose of receiving one of the aforementioned oxyacetylene cutting torch(es) and the deburring device associated with it in a desired cutting position along the lengthwise extension of a slab 300444AU Patent Specification.doc/iv -3held by this mechanism so that it can be flame-cut at the aforementioned desired cutting location, can be moved so as to be mounted on the second oblique base plane for the purpose of flame-cutting a slab loaded onto this second mechanism, so that the slab can be held in place at the desired cutting location.
A workstation can be placed on the line between these two mechanisms used to hold a slab, said workstation incorporating a series of rollers placed in bracketed pairs so as to receive a slab on its edge at an angle of-10 to -20' with respect to the vertical plane on a third oblique base plane formed by this series of rollers placed in bracketed pairs; the pair of guides can be moved in unison along and atop the aforementioned third oblique base plane. The rollers in the aforementioned pairs of rollers that receive the slab on its edge are motorized so as to carry the slab from the aforementioned mechanism for holding a slab to the oxyacetylene cutting workstation and then to the second mechanism for holding a slab, where the cut slab is unloaded.
These mechanisms for holding a slab can be tipped in such a way that their oblique base plane is in a horizontal position, for the purpose of loading a slab or unloading a cut slab, respectively.
According to the invention, a device for flame-cutting slabs by means of at least one oxyacetylene cutting torch can also include a feed area; an oxyacetylene cutting area equipped with the aforementioned oxyacetylene cutting torch(es) and an associated deburring device placed opposite to each, with the slab lying in this oxyacetylene cutting area with its primary plane in horizontal position between the aforementioned cutting torch(es) and the deburring device for each; and a slab unloading area. The device could include mechanisms for transporting the slab from the feed area to the oxyacetylene cutting area and then to the unloading area, and the oxyacetylene cutting torch can be moved along a line that is perpendicular to the slab's lengthwise extension, from one lengthwise edge of the slab to the opposite lengthwise edge, so that the slabs can be cut; moreover, the oxyacetylene cutting torch can be stopped at any point along this perpendicular line so that a slab to be flame-cut can be slit during the oxyacetylene cutting procedure as it is moved in the direction of its lengthwise extension.
The feed area and/or the unloading area may include an elevating table that can be adjusted so that its base plane is even with the oxyacetylene cutting area.
300444AU Patent Specification.doc/iv -4- The oxyacetylene cutting area can be made up of an adequate number of base rollers whose axis is perpendicular to the direction in which the slabs move from the feed area to the unloading area, so that they form a base plane; the aforementioned cutting torch(es) and the deburring device associated with each are arranged in the space between two neighboring base rollers and on either side of the base plane formed by the base rollers.
The mechanisms to be used to transport the slabs may include equipment to push the slabs in the feed area as well as motorized base rollers.
The device may include additional motorized base rollers on either side of the oxyacetylene cutting area in order to form a set of transfer rollers, and the feed area and unloading area may be arranged laterally to this set of transfer rollers, while equipment for pushing the cut or slit slabs can be included in the unloading area.
The invention will now be described by way of non-restrictive examples with reference to the attached drawings, in which: Figure 1 is a front view and side view of one method of producing the invention, comprising two workstations that can be used in alternating order to flame-cut slabs using an oxyacetylene cutting torch/deburrer assembly that can be moved from one workstation to the other and vice versa; Figure 2 depicts the method of producing the invention shown in Figure 1, with each of the workstations loaded with a slab to be cut, and the oxyacetylene cutting torch/deburrer assembly in operation at the left workstation; Figure 3 depicts the method of producing the invention shown in Figure 1, at the point when the slab at the left workstation has been cut and is ready for unloading, while the oxyacetylene cutting torch/deburrer assembly is in operation at the right workstation; Figure 4 is a schematic view of the invention shown in Figure 1 with a workstation inserted between the left and right workstations, and the oxyacetylene cutting torch/deburrer assembly is in operation at the central workstation; Figure 5 depicts another method of producing the invention; and Figure 6 depicts a variant method of producing the invention shown in Figure Note that in the Figures the term "poste" is translated as "workstation".
300444AU Patent Specification.doc/iv Figures 1 through 3 depict a method of producing a device with two workstations for flame-cutting slabs using at least one oxyacetylene cutting torch (3) in accordance with the invention, in front view and side view in various states of operation: at rest without a slab; in operation for the purpose of flame-cutting a slab on the left workstation, while the right workstation has already been loaded with another slab to be cut; and in operation for the purpose of flame-cutting a slab on the right workstation, while a slab that has been cut at the left workstation is ready to be removed.
Each workstation includes a base frame that can be adjusted between a horizontal'position (not shown) and an inclined position that is offset from the vertical by an angle of-10' to -20' and preferably -15' as shown in Figures 1 through 3.
The base frame includes several pairs of bracket-mounted rollers 6) used to insert a slab edgewise on the lower rollers these rollers form an oblique base plane for a slab to be cut. These pairs of rollers 6) at each workstation can each be moved along the lengthwise extension of the relevant base frame by using appropriate methods familiar to those in the trade. Each pair of rollers 6) can thereby be placed at the appropriate location where they will not interfere with the operation of the oxyacetylene cutting torch as it cuts the slab lying edgewise on the lower rollers and on the rollers that form the oblique base plane.
At least one pair of guides mounted by appropriate means atop the base frame so that, at each workstation for flame-cutting slabs, the guides can be moved along the extension of the base frame in the direction of the double arrow accommodates the aforementioned oxyacetylene cutting torch(es) and the deburring device (not shown) for each.,The oxyacetylene cutting torch and its associated deburring device are positioned so that they face each other on either side of the rollers during operation, the slab to be cut is between them.
The oxyacetylene cutting torch and its related deburring device can be moved along the length of their respective guide 8) in the direction indicated by the double arrow When in use on a slab to be cut, the cutting torch cuts across the slab (2) at its lengthwise extension, and the slab is cut.
300444AU Patent Specification.doc/iv -6- The slabs are cut as follows: One of the base frames is placed in horizontal position. A slab to be cut is loaded onto the rollers using an appropriate handling mechanism, such as a lifting or pushing mechanism, until it touches the rollers The base frame is tipped into the cutting position at an angle of -10" to preferably from the vertical. The oxyacetylene cutting torch is moved along the frame's lengthwise extension to the place on the slab where it is to be cut. The oxyacetylene cutting torch and its associated deburring device must then be moved to the empty space between two pairs of rollers Otherwise, the pair(s) of rollers 6) that are interfering with the operation of the cutting torch must be adjusted along the base frame so that they no longer interfere with the oxyacetylene cutting process. The oxyacetylene cutting torch and its deburring device are moved along the guides 8) to the upper or lower edge of the slab and the oxyacetylene cutting process begins.
Then the cutting torch and its deburring device are moved in the direction of the double arrow (10) toward the opposite lower or upper edge of the slab and the oxyacetylene cutting process is completed when the opposite edge is reached.
While this slab is being cut, another slab is loaded onto the second workstation in accordance with the procedure described above. Once the oxyacetylene cutting of the first slab is complete, the guides 8) are moved along with the oxyacetylene cutting torch and the deburring device to the other workstation, where the base frame is offset from the vertical at an angle identical to that of the base frame (4) on the first workstation where the oxyacetylene cutting process has just been completed.
These guides 8) can then be moved onto the base frame at the other workstation at the spot where the loaded slab must be cut, and the same control, adjustment and cutting operations described above are repeated on the slab that was loaded onto this second workstation.
Meanwhile, the base frame on the first workstation has been lowered into horizontal position and the cut slab has been removed by the aforementioned handling mechanism. Another slab to be cut is loaded onto the base frame The oxyacetylene cutting device described above can be used to cut the slabs in a continuous process. If a noncontinuous process is sufficient, it is possible to have only 300444AU Patent Specification.doc/iv one workstation with an area where the pair(s) of guides 8) can be placed out of the way while the slabs are loaded onto and unloaded from the single base frame If needed (for example, if the user wishes to cut a slab in more than one location), it is possible to have more than one pair of movable guides 8) mounted atop the base frame along with the necessary oxyacetylene cutting torch(es) and associated deburring devices; thus, an additional pair 8) is shown in Figures 1, 2 and 3.
It is difficult to slit a slab by means of flame-cutting using the device as it has been described above. For this purpose, a third workstation can be included, between and aligned with the workstations described above, having a base frame that can be adjusted within an operating range of -10' to -20' from the vertical but cannot necessarily be set to a horizontal position, although it is otherwise identical to the other workstations described above. Such a device is depicted schematically in Figure 4.
In the method of producing the invention shown in Figure 4, the guides 8) together with the oxyacetylene cutting torch and its associated deburring device can in principle be moved along the base frame at the third workstation, and yet can still be moved to the two other workstations for specific projects. In addition, in this method of producing the invention, the lower rollers or at least a portion of these rollers can be motorized in order to transport the slab to the third workstation to be flame-cut, once it has been loaded onto the workstation being used for loading, and then to transport the slab to the next workstation where the cut slabs are being unloaded. As in the method of producing the invention depicted in Figures 1 through 3, the base frames for the workstations on either end can be placed in horizontal position so that a slab can be loaded onto the rollers and a cut slab can be unloaded from the rollers The number of pairs of guides 8) will depend on the number of slab segments to be created from a single slab to be slit. It is also possible to cut a slab before slitting it. The method of producing the invention shown in the figure can be used either to cut slabs or to slit them or to cut and slit them in a continuous process.
An additional method of producing the device for flame-cutting slabs is shown in Figures 5 and 6. The oxyacetylene cutting device includes a slab loading area a work area (13) where the slabs are flame-cut by means of an oxyacetylene cutting torch (15) opposite a deburring device and an unloading area (14) for unloading the 300444AU Patent Specification.doc/iv cut slab During the oxyacetylene cutting process, the slab moves in horizontal position between the oxyacetylene cutting torch (15) and the deburring device (16) on the base rollers The assembly consisting of the cutting torch (15) and the deburring device (16) is located between two base rollers (17) and can be moved in the axial direction of the rollers (17) across the slab from one lengthwise edge to the other lengthwise edge in order to cut the slab at rest during oxyacetylene cutting, or in order to move the oxyacetylene cutting torch to a precise location between two lengthwise edges of the slab so that the slab is slit by moving it in a lengthwise direction on the rollers (17) during the oxyacetylene cutting procedure.
An elevating table (18 or 19), adjustable so that its surface or the upper surface of a slab or stack of slabs is level with the plane formed by the rollers can be incorporated into the loading area as well as the unloading area. A hydraulic or mechanical pushing mechanism (20) is included to push the slab or the top slab on a stack of slabs, on the elevating table (18) into and through the work area. In addition, some of the rollers (17) can be motorized in order to transport the slab into the work area (13) and then from the work area to the unloading area (14) where some other pushing or handling mechanism, not shown, removes the slab or a stack of slabs. The height of the elevating table (19) can be adjusted so that its surface or the upper surface of a slab (2) lying on the table (19) is level with the plane formed by the base rollers (17) and ready to receive the cut or slit slab Figure 6 is a schematic depiction of a variant of the device for flame-cutting slabs in accordance with Figure 5. The set of base rollers (17) is extended on either end of the work area into the loading areas (12 and 14), and the elevating tables (18, 19) are placed alongside the base rollers (17) in the loading and unloading areas. These tables, or the top surface of the slabs placed on the tables, are level with the base plane formed by the base rollers (17).
Using the variant shown in Figure 6 of the method of producing the invention depicted in Figure 5, a slab can be quickly and easily slit, while, in order to cut a slab, the oxyacetylene cutting torch (15) can be moved across a slab from one lengthwise edge to the other-a movement that is also required in order to adjust the width of each piece of the slit slab.
300444AU Patent Specification.doc/iv The slit slab is pushed from the table (18) in the loading area (12) onto the rollers by a pushing mechanism (20) in the direction of the arrow The rollers transport the slab towards and through the work area where, for example, the slab is slit into three pieces of equal or varying width using the oxyacetylene cutting torch The slab continues to be carried in the direction of the arrow (22) onto the rollers (17) in the unloading area where the pieces of the slit slab are pushed by the pushing mechanism (21) in the direction of the arrow (24) onto the table (19) in the unloading area (14).
300444AU Patent Specification.doc/iv
Claims (15)
1. Procedure for flame-cutting a slab using at least one oxyacetylene cutting torch at a workstation, including a step in which the slab and the oxyacetylene cutting torch are moved in relation to each other with the slab lying in cutting position, characterized in that, when in cutting position, the slab is arranged so that its primary plane lies at an angle of -10' to -200 from the vertical plane.
2. Oxyacetylene cutting procedure in accordance with Claim 1, characterized in that two workstations are available on the line for continuous operation; the slab is arranged at each workstation so that its primary plane lies at an angle of -10' to with respect to the vertical plane; each of the workstations is used for loading, flame- cutting and unloading a slab to be cut; and the two workstations are each used to flame-cut slabs in alternating order.
3. Oxyacetylene cutting procedure in accordance with Claim 2, characterized in that one of the workstations is used to load the slab to be cut and the other workstation is used to unload the cut slab an additional workstation is included on the line between these two workstations in order to flame-cut the slab in its cutting position of to -20' from the vertical plane, and the slab to be cut is loaded onto the loading workstation and carried from there to the aforementioned additional workstation, where it is subjected to the oxyacetylene cutting process as it passes, and then to the unloading workstation, where the cut slab is unloaded.
4. Oxyacetylene cutting procedure in accordance with any of Claims 1 through 3, characterized in that the slab is slit during the oxyacetylene cutting. Oxyacetylene cutting procedure in accordance with either of Claims 1 or 2, characterized in that the slab is slit during the relative movement between the slab and the oxyacetylene cutting torch
6. Oxyacetylene cutting procedure in accordance with Claim 3, characterized in that the slab is stopped at the additional workstation so that the relative movement between the slab and the oxyacetylene cutting torch can be used to slit the slab.
7. Oxyacetylene cutting procedure in accordance with Claim 1, characterized in that the slabs are loaded in a continuous sequence in order to be carried past the 300444AU Patent Specification.doc/iv -11- oxyacetylene cutting torch and are then slit or cut based on the direction of the relative movement between the slab and the oxyacetylene cutting torch
8. Device for the implementation of the procedure in accordance with any of Claims 1 through 7, incorporating at least one oxyacetylene cutting torch for flame- cutting a slab by moving the slab and the oxyacetylene cutting torch relative to each other, characterized by a mechanism for holding a slab to be cut such that the slab's primary plane lies at an angle of-10" to -20" with respect to a vertical plane.
9. Device in accordance with Claim 8, characterized in that the aforementioned mechanism for holding a slab includes rollers 6) placed in bracketed pairs so as to accommodate and hold the slab to be cut on its edge at an angle of -100 to -20' and to form an oblique base plane. Device in accordance with Claim 9, characterized by at least one pair of guides 8) that are capable of moving in unison along and atop this mechanism's oblique base plane in order to hold a slab each pair accommodating at least one oxyacetylene cutting torch and the deburring device for each, so that said oxyacetylene cutting torch and its associated deburring device can be placed at a desired cutting location along the lengthwise extension of a slab held by this mechanism in order to flame-cut the slab at this desired cutting location.
11. Device in accordance with Claim 9, characterized in that, for continuous oxyacetylene cutting of slabs, the following are included in the line: a second mechanism for holding a slab such that its primary plane lies at this same angle of-10' to with respect to the vertical plane, said second mechanism for holding a slab (2) also including rollers 6) placed in bracketed pairs so as to receive and hold the slab (2) to be cut on its edge at an angle of-10" to -200 and to form a second oblique base plane; the aforementioned pair(s) of guides 8) that are capable of moving in unison along and atop the mechanism's oblique base plane in order to hold a slab each pair accommodating at least one oxyacetylene cutting torch and the deburring device for each, so that said oxyacetylene cutting torch and its associated deburring device can be placed at a desired cutting location along the lengthwise extension of a slab held by this mechanism in order to flame-cut the slab at this desired cutting location, said pair(s) of guides being movable along the oblique base plane so as to be mounted atop the 300444AU Patent Specification.doc/iv -12- second oblique base plane in order to flame-cut a slab that has been loaded onto the second mechanism used to hold a slab at the desired cutting point.
12. Device in accordance with Claim 11, characterized by a workstation placed on the production line between these two mechanisms for holding a slab, said workstation incorporating a series of rollers 6) placed in bracketed pairs so as to receive a slab on its edge at an angle of-100 to -20' with respect to the vertical plane on a third oblique base plane formed by this series of rollers 6) placed in bracketed pairs, said pair of guides being capable of moving in unison along and atop this third oblique base plane, while the rollers among the rollers 6) that receive the slab on its edge are motorized so as to transport the slab in this mechanism for holding a slab to the workstation for flame-cutting the slab and then to transport the cut slab (2) from this workstation to the second mechanism for holding a slab in order to unload the cut slab.
13. Device in accordance with any of Claims 1 through 12, characterized in that the aforementioned mechanisms for holding a slab can be adjusted so that their oblique base plane is in a horizontal position for loading a slab or unloading a cut slab respectively.
14. Device for flame-cutting slabs by means of at least one oxyacetylene cutting torch characterized by a feed area an oxyacetylene cutting area (13) equipped with at least one oxyacetylene cutting torch (15) opposite to which is placed its associated deburring device, the slab lying in said oxyacetylene cutting area (13) with its primary plane in horizontal position between the oxyacetylene cutting torch(es) and the deburring device for each; and a slab unloading area and including mechanisms (20) for transporting the slab from the feed area (12) to the oxyacetylene cutting area (13) and then to the unloading area while the oxyacetylene cutting torch can be moved along a line that is perpendicular to the slab's lengthwise extension from one of its lengthwise edges to the opposite edge for the purpose of cutting the slabs that are being flame-cut and can also be stopped at any point along said perpendicular line for the purpose of slitting the slabs to be flame-cut, which, during the oxyacetylene cutting process, are transported in the direction of the slab's lengthwise extension. 300444AU Patent Specification.doc/iv 13- Device for flame-cutting slabs in accordance with Claim 14, characterized in that the feed area (12) and/or the unloading area (14) includes an elevating table (18, 19) that can be adjusted so that its base plane is level with the oxyacetylene cutting area (13).
16. Device for flame-cutting slabs in accordance with Claim 15, characterized in that the oxyacetylene cutting area (13) is made up of an appropriate number of base rollers (17) whose axis is perpendicular to the direction (22) in which the slabs are transported from the feed area (12) to the unloading area (14) to form a base plane, said oxyacetylene cutting torch(es) (15) and the deburring device associated with each being arranged in the space between two neighboring base rollers (17) and on either side of the base plane formed by the base rollers (17).
17. Device for flame-cutting slabs in accordance with Claim 16, characterized in that the mechanisms (20) for transporting the slabs include equipment for pushing the slabs in the feed area (12) and motorized base rollers (17).
18. Device in accordance with Claim 16, characterized by motorized base rollers (17) on either side of the oxyacetylene cutting area (13) forming a set of transfer rollers, characterized in that the feed area (12) and the unloading area (14) are arranged laterally to this set of transfer rollers, and characterized by equipment (21) for pushing the slabs, said equipment being used to unload the cut or slit slabs in the unloading area. DATED this 2 3 rd day of April 2002 EON HOLDINGS S.A. By their Attorneys PIPERS 300444AU Patent Specification.doc/iv
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU35643/02A AU785473B2 (en) | 2002-04-24 | 2002-04-24 | Procedure and device for flame-cutting a slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU35643/02A AU785473B2 (en) | 2002-04-24 | 2002-04-24 | Procedure and device for flame-cutting a slab |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU3564302A true AU3564302A (en) | 2003-10-30 |
| AU785473B2 AU785473B2 (en) | 2007-08-09 |
Family
ID=34069663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU35643/02A Ceased AU785473B2 (en) | 2002-04-24 | 2002-04-24 | Procedure and device for flame-cutting a slab |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU785473B2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2334250A (en) * | 1941-08-29 | 1943-11-16 | American Car & Foundry Co | Metal cutting or notching machine |
| FR2308458A1 (en) * | 1975-04-24 | 1976-11-19 | Socerma Sarl | Clad steel slabs welded together on their periphery - in large scale plant, prior to rolling into clad sheet |
| DE3742175C1 (en) * | 1987-12-12 | 1989-01-19 | Oxytechnik Ges Systemtech | Device and method for cutting U, T, L, I, flat or bead profiles |
-
2002
- 2002-04-24 AU AU35643/02A patent/AU785473B2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| AU785473B2 (en) | 2007-08-09 |
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| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |