EP0269619B1 - Timber planing machines - Google Patents
Timber planing machines Download PDFInfo
- Publication number
- EP0269619B1 EP0269619B1 EP86904318A EP86904318A EP0269619B1 EP 0269619 B1 EP0269619 B1 EP 0269619B1 EP 86904318 A EP86904318 A EP 86904318A EP 86904318 A EP86904318 A EP 86904318A EP 0269619 B1 EP0269619 B1 EP 0269619B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bed
- workpiece
- machine
- cutter
- thicknessing
- 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.)
- Expired
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27C—PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
- B27C1/00—Machines for producing flat surfaces, e.g. by rotary cutters; Equipment therefor
- B27C1/08—Machines for working several sides of work simultaneously
Definitions
- the invention relates to machines for planing and straightening lengths of timber.
- rough square-sawn timber is surface planed and cut to a predetermined thickness at an early stage in its use in manufacture.
- Such machines can similarly be used on a limited range of plastics and composite materials.
- Timber planing machines comprise a bed and a fence providing a datum line along which a piece of timber is passed for planing.
- Several cutters are generally provided for removing a large amount of wood from a single face of a piece of timber which is bowed or twisted, and/or for planing mutually perpendicular faces.
- the need to force a workpiece into contact with a cutter makes it very difficult in practice to plane mutually parallel faces of a workpiece on a single pass through the machine.
- At least three passes are generally required for a workpiece to be planed all round on a conventional single purpose planing machine, and this makes it necessary for the workpiece to be carried back to the input end of the machine after the second pass.
- GB 1020571 illustrates in its Figures 5 to 7 a four sided planing and moulding machine.
- Four or five cutter heads operate successively on a workpiece as it passes along a bed or table from right to left starting at driven presser rollers.
- a first cutter trues the bottom of the workpiece and also the lower part of its edge, producing two datum faces by which the workpiece can be properly guided for later facing operations.
- the table and fence are longitudinally divided to allow for adjustment of the depth of cut.
- This machine is expensive to produce, and time-consuming to adjust, but satisfactory for producing large quantities of timber of the same cross section. In practice, it has proved limited to a maximum product cross section of 4 inches by 3 inches (about 100 mm by 75 mm).
- GB 668988 relates to moulding planes which work the four sides of a plank with cutters arranged on crossed shafts, two sides being worked on each of two passes through the machine in opposite directions and at different levels.
- This plane is suitable for profiling or shaping a plank, particularly for cutting tongues and grooves, but cannot be used for straightening because it does not include a bed for supporting a workpiece. It has feed rollers at the side from which the workpiece is fed, and does not include an extractor as is necessary for the large quantity of chips produced in straightening.
- the invention comprises a machine for planing and straightening lengths of timber comprising a bed, an infeed face on the bed, a thicknessing table at a level below the bed, an outfeed face on the thicknessing table, mutually perpendicular spindles for cutter blocks adjacent the bed and the thicknessing table, a first one of the spindles extending below the bed, a second one of the spindles extending across the bed from one side of the first spindle to the other, a feed mechanism for conveying a workpiece along the bed where two mutually perpendicular straight faces of the workpiece are cut by the blocks, the feed mechanism being beyond the first spindle with respect to the passage of the workpiece along the bed, means for conveying the workpiece along the thicknessing table so that the workpiece is thicknessed by the cutting blocks, and an extractor for removing chips produced during the straightening and thicknessing of the workpiece.
- the workpiece In operation, on a first pass through the machine, the workpiece is planed on two mutually perpendicular faces by parts of cutter blocks adjacent to and extending over the bed. On a second pass back through the machine at the lower level, the other two faces are planed by parts of the cutter blocks below the bed and extending to the side of the first cutter block remote from the first pass.
- Two operators one at each end of the machine, can maintain a high level of activity passing workpieces through the machine once in each direction for planing on all four faces.
- the sensor of rotation of the cutters if correct for the first pass, is automatically correct for the second.
- the means for feeding the workpiece past the cutter blocks at the lower level is preferably a conveyor belt. This is suitable for maintaining the necessary pressure to keep the workpiece in contact with the second cutter block which extends across the bed.
- the conveyor belt makes it possible to use idler rollers to maintain the pressure to feed the workpiece, and consequently to do without driven rollers in this part of the machine.
- driven rollers could be used to feed the workpiece over a thicknessing table at the lower level.
- the machine may be provided with spindles for more than one cutter block to plane any face of a workpiece.
- a moulding attachment may be provided at either end of the machine, and is preferably adjustable in all directions in order to mould the workpiece as required. The proximity of the essential two cutter blocks to each other facilitates the extraction from the machine of the chips produced in operation.
- the spindles do not themselves actually each carry two cutter blocks; that is one above and one below the machine bed and one to each side of the other spindle.
- Either or both of the mutually perpendicular spindles drives a cutter block which is offset from the spindle itself. Any combination of such arrangements on either or both of the spindles may be provided according to customer requirements.
- the machine comprises a bed or infeed table 1, and a fence 2 along which a workpiece is passed for planing.
- the workpiece passes to an outfeed table 3 and an outfeed fence 4.
- the workpiece is then placed on a lower or thicknessing table 5 against a fence 6 where it is passed back through the machine and planed on the remaining two sides.
- a main cutter block 7 extends across the infeed table 1 and over the thicknessing table 5.
- a side cutter block 8, perpendicular to the main cutter block 7 and adjacent the infeed table 1, extends below the table 1 for planing the side of the workpiece in the thicknessing or second pass through the machine.
- the workpiece is generally introduced onto the table 1 by an operator to the left of Figure 1, and conveyed through the machine on a first pass by a feed mechanism 11 beyond the main cutter block 7.
- the workpiece planed on the first two sides is then removed from the outfeed table 3, generally by a second operator. standing to the right of Figure 1.
- the second operator then places the workpiece on the thicknessing table 5, which comprises a conveyor belt on which the workpiece is held in contact by the pressure of idler rollers 43 ( Figure 5).
- the workpiece is conveyed along the fence 6 to the left in Figure 1 as it is thicknessed or planed on the remaining two sides by the parts of the cutter block 7 extending across the table 1 beyond the side cutter block 8, and of the block 8 extending below the table 1.
- the cutter blocks 7, 8 are driven respectively through belts 17, 18 from electric motors 27, 28.
- the thicknessing table conveyor 5 is driven by an electric motor 29.
- the machine comprises a structurally rigid plinth 30 mounted on a box base 31.
- the infeed table 1 is mounted on a frame member 32 by swing links 33 for varying the depth of cut taken by the main cutter block 7.
- the fence 2 is adjustable on swing links to vary the depth of cut taken by the side cutter block 8.
- the outfeed table 3 is equipped with a fine adjustment handle 34 for levelling the table to the main cutter block 7, for example on re-setting after changing cutter knives.
- the second sectional view from the thicknessing side in Figure 5 shows how the frame member 32 is supported on the plinth 30 by four screws 38, one at each corner, and only two of which appear in Figure 5, one in section and the other covered by a protective bellows 39.
- the screws 38 are linked by a, chain 40 so that the frame 32 can be raised or lowered at one time by adjustment of the screw 38 through the chain 40 and a handle 41 to give the required finished thickness of the timber.
- the fence 6 is adjusted along a fence bar to give the required finished width.
- FIG. 4a there is no planer side cutter block 8 above the table 1 to the right of the centre of the machine.
- the thicknesser side cutter block 8 can however still be seen below the table 1. More detail is visible in Figure 5a, where it can be seen that the spindle on which the cutter block 8 is mounted extends upward by the side of the extractor 16 and has a pulley wheel 50 keyed thereon.
- the pulley wheel 50 drives a belt 52 to rotate a further spindle 54 which carries a planar side cutter block 9.
- the planer side cutter block 9 is to the outfeed side of the main cutter block 7, while in the former embodiment of Figure 4 the planer side cutter block 8 was to the infeed side of the main cutter block 7.
- a lower face of a workpiece is planed first to provide a flat datum surface.
- the spindle driving the main cutter block 7 may similarly drive a subsidiary spindle parallel to but offset from itself, and the subsidiary spindle may carry a cutter block for planing a part of a surface different from that planed by the block 7.
- the spindles carrying the cutter blocks 7, 8 may be provided with a subsidiary offset spindle.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Milling, Drilling, And Turning Of Wood (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Manufacture Of Wood Veneers (AREA)
Abstract
Description
- The invention relates to machines for planing and straightening lengths of timber. In such a machine, rough square-sawn timber is surface planed and cut to a predetermined thickness at an early stage in its use in manufacture. Such machines can similarly be used on a limited range of plastics and composite materials.
- Timber planing machines comprise a bed and a fence providing a datum line along which a piece of timber is passed for planing. Several cutters are generally provided for removing a large amount of wood from a single face of a piece of timber which is bowed or twisted, and/or for planing mutually perpendicular faces. The need to force a workpiece into contact with a cutter makes it very difficult in practice to plane mutually parallel faces of a workpiece on a single pass through the machine. At least three passes are generally required for a workpiece to be planed all round on a conventional single purpose planing machine, and this makes it necessary for the workpiece to be carried back to the input end of the machine after the second pass.
- GB 1020571 illustrates in its Figures 5 to 7 a four sided planing and moulding machine. Four or five cutter heads operate successively on a workpiece as it passes along a bed or table from right to left starting at driven presser rollers. A first cutter trues the bottom of the workpiece and also the lower part of its edge, producing two datum faces by which the workpiece can be properly guided for later facing operations. The table and fence are longitudinally divided to allow for adjustment of the depth of cut. This machine is expensive to produce, and time-consuming to adjust, but satisfactory for producing large quantities of timber of the same cross section. In practice, it has proved limited to a maximum product cross section of 4 inches by 3 inches (about 100 mm by 75 mm).
- GB 668988 relates to moulding planes which work the four sides of a plank with cutters arranged on crossed shafts, two sides being worked on each of two passes through the machine in opposite directions and at different levels. This plane is suitable for profiling or shaping a plank, particularly for cutting tongues and grooves, but cannot be used for straightening because it does not include a bed for supporting a workpiece. It has feed rollers at the side from which the workpiece is fed, and does not include an extractor as is necessary for the large quantity of chips produced in straightening.
- In summary, the invention comprises a machine for planing and straightening lengths of timber comprising a bed, an infeed face on the bed, a thicknessing table at a level below the bed, an outfeed face on the thicknessing table, mutually perpendicular spindles for cutter blocks adjacent the bed and the thicknessing table, a first one of the spindles extending below the bed, a second one of the spindles extending across the bed from one side of the first spindle to the other, a feed mechanism for conveying a workpiece along the bed where two mutually perpendicular straight faces of the workpiece are cut by the blocks, the feed mechanism being beyond the first spindle with respect to the passage of the workpiece along the bed, means for conveying the workpiece along the thicknessing table so that the workpiece is thicknessed by the cutting blocks, and an extractor for removing chips produced during the straightening and thicknessing of the workpiece.
- In operation, on a first pass through the machine, the workpiece is planed on two mutually perpendicular faces by parts of cutter blocks adjacent to and extending over the bed. On a second pass back through the machine at the lower level, the other two faces are planed by parts of the cutter blocks below the bed and extending to the side of the first cutter block remote from the first pass. Two operators, one at each end of the machine, can maintain a high level of activity passing workpieces through the machine once in each direction for planing on all four faces. The sensor of rotation of the cutters, if correct for the first pass, is automatically correct for the second.
- The means for feeding the workpiece past the cutter blocks at the lower level is preferably a conveyor belt. This is suitable for maintaining the necessary pressure to keep the workpiece in contact with the second cutter block which extends across the bed. The conveyor belt makes it possible to use idler rollers to maintain the pressure to feed the workpiece, and consequently to do without driven rollers in this part of the machine. Alternatively, driven rollers could be used to feed the workpiece over a thicknessing table at the lower level.
- The machine may be provided with spindles for more than one cutter block to plane any face of a workpiece. A moulding attachment may be provided at either end of the machine, and is preferably adjustable in all directions in order to mould the workpiece as required. The proximity of the essential two cutter blocks to each other facilitates the extraction from the machine of the chips produced in operation.
- When planing a piece of timber which is badly bowed or twisted, or of great width, it is advantageous first to plane a lower face to provide a flat datum surface, and then to plane a face perpendicular thereto. Thus, in a modification, the spindles do not themselves actually each carry two cutter blocks; that is one above and one below the machine bed and one to each side of the other spindle. Either or both of the mutually perpendicular spindles drives a cutter block which is offset from the spindle itself. Any combination of such arrangements on either or both of the spindles may be provided according to customer requirements.
-
- Figure 1 is an overall view of a machine according to the invention;
- Figure 2 is a view similar to Figure 1 from the other side of the machine showing the planing of the first two sides of a workpiece;
- Figure 3 is a closer view of the machine of Figures 1 and 2 from yet another stand-point showing the thicknessing or planing of the remaining two sides of the workpiece;
- Figure 4 is a vertical section through the planing side of the machine of the preceding Figures, that is the side of the machine at which the first two sides of the workpiece are planed;
- Figure 5 is a section of the thicknessing or other side of the machine of the preceding Figures;
- Figure 6 is a sectional end view of the same machine;
- Figure 4a is a vertical section corresponding to Figure 4 through the planing side of a modified machine according to the invention, that is through the side of the machine at which the first two sides of the workpiece are planed; and
- Figure 5a is a section of the thicknessing or other side of the machine of Figure 4a.
- With particular reference to Figure 1, the machine comprises a bed or infeed table 1, and a
fence 2 along which a workpiece is passed for planing. The workpiece passes to an outfeed table 3 and an outfeed fence 4. The workpiece is then placed on a lower or thicknessing table 5 against afence 6 where it is passed back through the machine and planed on the remaining two sides. Amain cutter block 7 extends across the infeed table 1 and over the thicknessing table 5. Aside cutter block 8, perpendicular to themain cutter block 7 and adjacent the infeed table 1, extends below the table 1 for planing the side of the workpiece in the thicknessing or second pass through the machine. - The workpiece is generally introduced onto the table 1 by an operator to the left of Figure 1, and conveyed through the machine on a first pass by a
feed mechanism 11 beyond themain cutter block 7. The workpiece planed on the first two sides is then removed from the outfeed table 3, generally by a second operator. standing to the right of Figure 1. The second operator then places the workpiece on the thicknessing table 5, which comprises a conveyor belt on which the workpiece is held in contact by the pressure of idler rollers 43 (Figure 5). The workpiece is conveyed along thefence 6 to the left in Figure 1 as it is thicknessed or planed on the remaining two sides by the parts of thecutter block 7 extending across the table 1 beyond theside cutter block 8, and of theblock 8 extending below the table 1. Thecutter blocks belts electric motors thicknessing table conveyor 5 is driven by anelectric motor 29. - In Figure 2, there appears a piece of timber or workpiece being planed on its first two sides on its first pass through the machine. It can be seen how an
extractor 16 for chippings produced in the planing on both the first and second passes through each machine is conveniently arranged over thecutter blocks - Turning now to the sectional views, and Figure 4 first of all, it can be seen that the machine comprises a structurally
rigid plinth 30 mounted on abox base 31. The infeed table 1 is mounted on aframe member 32 byswing links 33 for varying the depth of cut taken by themain cutter block 7. Thefence 2 is adjustable on swing links to vary the depth of cut taken by theside cutter block 8. The outfeed table 3 is equipped with afine adjustment handle 34 for levelling the table to themain cutter block 7, for example on re-setting after changing cutter knives. - The second sectional view from the thicknessing side in Figure 5 shows how the
frame member 32 is supported on the plinth 30 by fourscrews 38, one at each corner, and only two of which appear in Figure 5, one in section and the other covered by a protective bellows 39. - The
screws 38 are linked by a,chain 40 so that theframe 32 can be raised or lowered at one time by adjustment of thescrew 38 through thechain 40 and ahandle 41 to give the required finished thickness of the timber. Thefence 6 is adjusted along a fence bar to give the required finished width. - Turning now to the modification of Figure 4a, there is no planer
side cutter block 8 above the table 1 to the right of the centre of the machine. The thicknesserside cutter block 8 can however still be seen below the table 1. More detail is visible in Figure 5a, where it can be seen that the spindle on which thecutter block 8 is mounted extends upward by the side of theextractor 16 and has apulley wheel 50 keyed thereon. Thepulley wheel 50 drives abelt 52 to rotate afurther spindle 54 which carries a planarside cutter block 9. It will be noted that the planerside cutter block 9 is to the outfeed side of themain cutter block 7, while in the former embodiment of Figure 4 the planerside cutter block 8 was to the infeed side of themain cutter block 7. Thus according to the present modification a lower face of a workpiece is planed first to provide a flat datum surface. - Other differences between the present modified construction as best shown in Figure 4a, and the former embodiment of Figure 4, although of no particular relevance to the invention, are that the
infeed fence 2 is much deeper, and thefeed mechanism 11 is quite different. - Although not illustrated in the drawings, it will be understood that the spindle driving the
main cutter block 7, may similarly drive a subsidiary spindle parallel to but offset from itself, and the subsidiary spindle may carry a cutter block for planing a part of a surface different from that planed by theblock 7. Either one or both of the spindles carrying the cutter blocks 7, 8 may be provided with a subsidiary offset spindle.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT86904318T ATE65733T1 (en) | 1985-08-16 | 1986-07-22 | PLANING MACHINES FOR WOOD. |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB858520563A GB8520563D0 (en) | 1985-08-16 | 1985-08-16 | Timber planing machines |
GB8520563 | 1985-08-16 | ||
GB868600488A GB8600488D0 (en) | 1986-01-09 | 1986-01-09 | Timber planing machines |
GB8600488 | 1986-01-09 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0269619A1 EP0269619A1 (en) | 1988-06-08 |
EP0269619B1 true EP0269619B1 (en) | 1991-07-31 |
Family
ID=26289670
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86904318A Expired EP0269619B1 (en) | 1985-08-16 | 1986-07-22 | Timber planing machines |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0269619B1 (en) |
AT (1) | ATE65733T1 (en) |
AU (1) | AU593272B2 (en) |
CA (1) | CA1265025A (en) |
DE (1) | DE3680673D1 (en) |
WO (1) | WO1987001067A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5071649A (en) * | 1986-05-15 | 1991-12-10 | Emory University | Method of preventing blockage in catheters |
US5032394A (en) * | 1986-05-15 | 1991-07-16 | Emory University | Method of treating burns |
US5041288A (en) * | 1986-05-15 | 1991-08-20 | Emory University | Method of treating tissue damaged by reperfusion injury |
US5030448A (en) * | 1986-05-15 | 1991-07-09 | Emory University | Method of delivering drugs to damaged or diseased tissue |
FR2659590B1 (en) * | 1990-02-05 | 1993-09-10 | Somafin Cmd Sarl | MACHINE FOR THE CONTINUOUS CUTTING OF CHEVRONS. |
DE102006009421A1 (en) | 2006-02-23 | 2007-09-06 | Michael Weinig Ag | moulder |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE146984C (en) * | ||||
FR570916A (en) * | 1923-09-20 | 1924-05-09 | ||
GB668988A (en) * | 1950-04-28 | 1952-03-26 | Lauri Johannes Aittomaki | Improvements in or relating to moulding planes |
GB809670A (en) * | 1955-08-03 | 1959-02-25 | Stenbergs Maskinbyra Ab | Wood planing machine |
DE1017361B (en) * | 1956-03-14 | 1957-10-10 | Maschb Scholz Komm Ges | Thickness planer with a pressure roller acting against the workpiece in the immediate vicinity of the knife shaft on the same side of the workpiece |
DE1227635B (en) * | 1960-03-23 | 1966-10-27 | Festo Maschf Stoll G | Rod milling machine for woodworking |
GB1020571A (en) * | 1961-01-30 | 1966-02-23 | Wadkin Ltd | Woodworking machinery |
US4440204A (en) * | 1982-08-16 | 1984-04-03 | Shopsmith, Inc. | Planer mounting system |
IT1212927B (en) * | 1983-06-09 | 1989-12-07 | Scm Finanz | PLANER WITH PERFECTED THICKNESS |
-
1986
- 1986-07-22 EP EP86904318A patent/EP0269619B1/en not_active Expired
- 1986-07-22 AT AT86904318T patent/ATE65733T1/en not_active IP Right Cessation
- 1986-07-22 DE DE8686904318T patent/DE3680673D1/en not_active Expired - Fee Related
- 1986-07-22 WO PCT/GB1986/000435 patent/WO1987001067A1/en active IP Right Grant
- 1986-07-22 AU AU61490/86A patent/AU593272B2/en not_active Ceased
- 1986-08-01 CA CA000515204A patent/CA1265025A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
WO1987001067A1 (en) | 1987-02-26 |
ATE65733T1 (en) | 1991-08-15 |
AU593272B2 (en) | 1990-02-08 |
AU6149086A (en) | 1987-03-10 |
EP0269619A1 (en) | 1988-06-08 |
DE3680673D1 (en) | 1991-09-05 |
CA1265025A (en) | 1990-01-30 |
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