WO1998048985A1 - Handhobelmaschine - Google Patents
Handhobelmaschine Download PDFInfo
- Publication number
- WO1998048985A1 WO1998048985A1 PCT/DE1998/000869 DE9800869W WO9848985A1 WO 1998048985 A1 WO1998048985 A1 WO 1998048985A1 DE 9800869 W DE9800869 W DE 9800869W WO 9848985 A1 WO9848985 A1 WO 9848985A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- planer
- shaft
- longitudinal slot
- knife
- spacer bar
- Prior art date
Links
- 125000006850 spacer group Chemical group 0.000 claims description 31
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 229910000997 High-speed steel Inorganic materials 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 5
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G13/00—Cutter blocks; Other rotary cutting tools
- B27G13/12—Cutter blocks; Other rotary cutting tools for profile cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G13/00—Cutter blocks; Other rotary cutting tools
- B27G13/02—Cutter blocks; Other rotary cutting tools in the shape of long arbors, i.e. cylinder cutting blocks
- B27G13/04—Securing the cutters by mechanical clamping means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
- B27M1/003—Mechanical surface treatment
Definitions
- the invention relates to a hand planer, a planer shaft, a planer knife and a spacer bar according to the preamble of claim 1 or 11 or 13 or 15.
- a planing machine with a planing shaft is known, the elongated planing knives of which extend over the width of the planing shaft and can be tensioned by centrifugally operated clamping wedges which are carried by the planing shaft.
- the well-known planing machine is only suitable for clamping large-volume planing knives.
- the considerably narrower and thinner tungsten carbide mini-inserts e.g. in the standard size of 1.1 mm thick and 5.5 mm high, cannot be clamped in any defined position in the known planing machine because they are about ten times smaller in volume than the large-volume planing knives and have mass.
- the large-volume planer knife is not economically producible from hard metal because of its large dimensions, because the costs for hard metal are very high, so that for the known planer only less stable, lower-quality planer knives made of high-speed steel come into question.
- a planing machine with a planer shaft consisting of profiled disks is known, in the longitudinal groove of which a centrifugally operated clamping wedge is arranged.
- This plane shaft is also not suitable for holding mini inserts, but only for conventional high-speed steel knives of about 3 mm and 11.5 mm high. These would also be uneconomically expensive to implement as a hard metal knife.
- a clamping device on a planer shaft for large-volume rustic planer knives with a corrugated cutting edge is known, which can alternatively also accommodate double-edged, straight mini indexable inserts.
- a chip protection part is inserted into a longitudinal groove of the planer shaft, which is supported on the groove flank in front of the planer knife in the direction of rotation and clamps the planer knife against the other groove flank.
- the chip deflector has on its radially outward-facing side a corrugated profile that corresponds to the large-volume rustic cutting edge profile.
- a mini indexable insert is to be clamped instead of the rustic planer knife, it is not only possible to clamp using the clamping wedge, but an additional clamping body is required, which - including the mini indexable insert - clamps between the clamping wedge and the outer groove flank.
- the rustic knife clamping wedge must be exchanged for standard clamping wedges with a straight chip protection part because of the wave-shaped chip protection part. This makes the planer knife change cumbersome and also requires separate storage for the different clamping wedges.
- the corrugated chip deflector is necessary to limit the chip thickness, because the maximum chip thickness is much greater with rustic planer knives than with straight planer knives. The reason for this is that even the thinnest chips produced with the troughs in the edge of the cutting edge must still have sufficient strength for a high surface quality. Therefore, the minimum chip thickness for rustic knives matches the minimum chip thickness of straight planer knives, whereby the maximum chip thickness, in order to make the rustic structure appear optically, has to be about one millimeter thicker than the minimum chip thickness.
- planing machine according to the invention the planing shaft, the planing knife and the spacer bar with the features of claims 1, 11, 13 and 15 have the advantage over that in the same way as mini-inserts, rustic planing knives according to the invention can be clamped in their standard clamping devices , so that the effort for the production of special equipment for rustic knives is eliminated.
- a chip deflection part for limiting the chip thickness can be used as a plastic strip in a further longitudinal groove of the planing shaft, which is easy to produce, without increasing the weight.
- the plane shafts according to the invention with centrifugal force are suitable for mini-inserts for the production of rustically structured workpiece surfaces, without producing appreciably higher manufacturing costs than for previous plane shafts for straight double-edged mini-inserts or for other straight planer knives.
- planer knife only carries an effective cutting edge with wave troughs and wave crests, the wave troughs lying on a common first straight line, which has the same parallel spacing with respect to its back groove as normal cutting edges of conventional mini-inserts opposite the back groove and that the wave crests are open lie a common second straight line, which runs 0.5 to 1.5 mm above the first straight line, and that the planer knife on the side opposite the first cutting edge instead of a second cutting edge carries a flattened contact edge for support against the radial stop of the planing shaft, wherein the parallel distance between the contact edge and the back groove is 0.5 to 1.5 mm smaller than the parallel distance between the back groove and the opposite troughs, a rustic knife that is particularly easy to produce from the mini indexable inserts is created, which is also particularly precise compared to the Radially position planer shaft bar, with changes in position due to clamping being excluded.
- the hand planes according to the invention can be produced more efficiently, more easily and more cost-effectively.
- This advantage is too given that the planing knife with a wavy cutting edge is 1.1 mm thick, 5.5 mm high and as wide as the planing shaft and is preferably made of hard metal.
- the planer or the planer shaft is lighter and can be manufactured more easily.
- the spacer bar can be arranged on the planer shaft in such a way that it is secured against loss.
- the plastic spacer bar saves weight because the further longitudinal slot reduces the planer shaft mass more than the spacer bar increases the overall mass of the planer shaft.
- the outer edge of the spacer bar protruding beyond the outer contour of the planer shaft is undulating and has a 1 mm smaller flight circle diameter than the cutting edge of the planer knife, ensures that it functions as a chip thickness limiter. Due to the fact that the edge of the spacer strip opposite the outer edge with the shaft contour is straight contoured, an alternative to the chip thickness limitation adjustable, flush with the outer contour of the planer shaft slot closure is created. In addition, the spacer bar is also secured against axial displacement or loss from the longitudinal slot by the lateral shoulder. drawing
- FIG. 1 shows a side view of the planer according to the invention
- FIG. 2 shows a top view of the back of a rustic planer knife according to the invention
- FIG. 3 shows a spatial view of a planing shaft according to the invention with a rustic planing knife
- FIG. 4 shows a side view of the planing shaft according to FIG. 3
- FIG. 5 shows a spacer bar for chip thickness limitation for insertion into the planer shaft according to the invention.
- FIG. 1 The side view of a hand planer 10 shown in FIG. 1 consists of a machine housing 12 with a motor housing 14 and a handle 16.
- the handle 16 carries an electrical switch 18.
- a planer shaft 20 is rotatably mounted in the machine housing 12 about its axis 19 in the direction of the direction of rotation arrow 11. This carries two planer knives 21, each with a wave-shaped (FIG. 2) cutting edge 22, in front of which 20 flutes 25 are formed in the outer contour 23 of the plane shaft.
- planer knives 21 each with a wave-shaped (FIG. 2) cutting edge 22, in front of which 20 flutes 25 are formed in the outer contour 23 of the plane shaft.
- the knives 21 determine with their cutting edges 22 a flight circle 24 shown in dash-dot lines, which protrudes beyond the sole 26 of the hand planing machine 10, so that the cutting edges 22 can engage in a workpiece 27 that is flush with the sole 26.
- An opening 28 arranged in the sole 26 for the passage of the cutting edges 22 downwards can be closed by a pendulum protective hood 30. This closes the opening 28 automatically as soon as the hand planer 10 is lifted off the workpiece 27 becomes. This reduces the risk of injury to the operator on the rotating blades 22.
- the machine housing 12 has on both sides of the planer shaft 20 in the region of the sole 26 lateral recesses 32 through which the planer knives 21 can be removed from the side of the planer shaft 20 or inserted into the latter for tensioning.
- the hollow knives 21 are automatically tensioned in a reliable manner when the hand plane 10 is started up.
- a back view of the planer knife 21 shown in detail in FIG. 2 shows its wavy contoured cutting edge 22 with wave crests 38 and wave troughs 39.
- the wave crests 38 lie on a common straight line 0 and the wave troughs 39 run on a common straight line U.
- In the middle of the back 34 runs over the length of a back groove 35, which serves to overlap a longitudinal rib 37 (Fig. 4) of the plane shaft 20.
- a center line C of the back groove 35 is the reference line for the distance dimensions a, b to the common
- the plane shaft 20 shown spatially in FIG. 3 has an essentially circular outer contour 23.
- the plane shaft 20 forms a hollow profile with two symmetrical, opposite, axially parallel recesses 42, 43, 44, 45 to reduce the weight.
- the recesses 44, 45 form through their special contour that opens at one point radially outwards in a longitudinal slot 46, each a part of the planer shaft 20 passing over a leaf spring 54 into a centrifugal wedge 56.
- the planing knives 21 sit on two radially opposite sides thin mini-inserts are designed, the cutting edge 22, the back groove 35 and the contact edge 36 are clearly recognizable.
- planer knives 21 are stretched in the longitudinal slot 46 of the planer shaft 20 between groove flanks, not specified.
- the longitudinal slot 46 extends radially from the outer contour 23 inwards via a longitudinal rib 37 (FIG. 4) engaging in the back groove 35 of the planing knife 21 into a straight projecting, right-angled transverse step 50.
- the longitudinal slot 46 then widens to the recess 44. This is contoured in such a way that a region of the plane shaft 20 which is thin relative to the outer contour 23 forms a leaf spring 54 which thickens to form a centrifugal wedge 56.
- the centrifugal wedge 56 engages around the projection 50 with a catch groove 58 and, with its straight side leading radially outwards, forms the left flank of the longitudinal slot 46, which merges radially on the outside into the chip groove 25.
- This flank is arranged at such an angle that there is no self-locking between the centrifugal wedge 56 and the planer knife 21 in the tensioned position, when the centrifugal wedge 56 is in contact with the flat side of the planing knife 21.
- the centrifugal wedge 56 always returns to it Release position back, because no centrifugal force acts as soon as the plane shaft 20 stops. This makes it easier to change the planing knife.
- the catch groove 58 encompassing the transverse step 50 limits the radial stroke of the centrifugal wedge 56 both inwards and outwards in order to avoid overextension of the leaf spring 54.
- the bias of the leaf spring 54 is selected such that the planer knife 21 cannot change its axial position in relation to the longitudinal slot 46 or get lost even when the plane shaft 20 is at a standstill.
- a side view of the plane shaft 20 shows the axis 19 of the plane shaft 20, which carries the plane shaft body.
- planing shaft 20 carries the planing knife 21 with the corrugated cutting edge 22.
- This planing knife 21 also known as a rustic planing knife, has the same external dimensions as mini indexable inserts with straight cutting edges and can be exchanged for one without further ado.
- FIGS. 3 and 4 show how the planing knife 21 with its flattened contact edge 36 is supported radially on the inside on the transverse step 50 projecting perpendicularly to the planing knife 21. This enables a particularly secure radial positioning of the cutting edge 22 and thus an exact adjustment of the flight circle 24.
- the longitudinal rib 37 only serves to engage the back of the planing knife 21, as is customary with mini-indexable inserts, in order to prevent it from unintentionally escaping from the longitudinal slot 46.
- a further longitudinal slot 48 with a cross-shaped cross-section open to the outside is arranged in the viewing direction to the left of the planer knife 21, into which a spacer bar 60 can be securely inserted to prevent loss.
- the spacer bar 60 is wave-shaped on its radially outer edge 62, and has a straight contour on its radially inner edge 64.
- the spacer bar 60 On the right and left, the spacer bar 60 carries a shoulder 61 for positive engagement in the cross-shaped longitudinal slot 48.
- the spacer bar 60 can be turned over by its previously external, corrugated side coming to lie radially inward, and the straight edge 64 being flush with the Outer contour 23 of the plane shaft 20 closes.
- Figure 5 shows the spacer bar 60 as a detail with a view of the long side.
- the corrugated edge 62 which is located radially on the outside when operated with the rustic planer knife 21, and the shoulders 61 are clearly recognizable
- Another longitudinal slot 48 prevents a further axial displacement of the spacer bar 60 and thus defines its axial position with respect to the plane shaft 20.
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)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54646498A JP2002508716A (ja) | 1997-04-26 | 1998-03-25 | 手持ち式かんな削り機械 |
DE59803341T DE59803341D1 (en) | 1997-04-26 | 1998-03-25 | Handhobelmaschine |
US09/403,816 US6249982B1 (en) | 1997-04-26 | 1998-03-25 | Hand planer |
EP98928065A EP0977654B1 (de) | 1997-04-26 | 1998-03-25 | Handhobelmaschine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19717706.9 | 1997-04-26 | ||
DE19717706A DE19717706A1 (de) | 1997-04-26 | 1997-04-26 | Handhobelmaschine |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998048985A1 true WO1998048985A1 (de) | 1998-11-05 |
Family
ID=7827856
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1998/000869 WO1998048985A1 (de) | 1997-04-26 | 1998-03-25 | Handhobelmaschine |
Country Status (6)
Country | Link |
---|---|
US (1) | US6249982B1 (de) |
EP (1) | EP0977654B1 (de) |
JP (1) | JP2002508716A (de) |
CN (1) | CN1089053C (de) |
DE (2) | DE19717706A1 (de) |
WO (1) | WO1998048985A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2347381A (en) * | 1999-02-18 | 2000-09-06 | Machell & Sons Ltd W | A method of producing a wood board section with a smooth surface undulation |
GB2352207A (en) * | 1998-12-07 | 2001-01-24 | Bosch Gmbh Robert | A plane knife with a cutting edge formed on an arc-shaped recess |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD508833S1 (en) | 2004-09-24 | 2005-08-30 | One World Technologies Limited | Planer |
EP1927444B1 (de) * | 2006-12-01 | 2012-08-15 | Kälin & Co. AG | Hobelmesser |
GB0722107D0 (en) * | 2007-11-10 | 2007-12-19 | Exakt Prec Tools Ltd | Improvements in adn relating to power tools |
US8230607B2 (en) | 2008-05-09 | 2012-07-31 | Milwaukee Electric Tool Corporation | Keyless blade clamp for a power tool |
JP2012228842A (ja) * | 2011-04-27 | 2012-11-22 | Kanefusa Corp | 切削用刃物及び回転切削工具 |
WO2014148947A1 (ru) * | 2013-03-21 | 2014-09-25 | Filimonov Boris Nikolaevich | Электрорубанок и нож электрорубанка |
EP3064369B1 (de) * | 2013-11-01 | 2020-04-15 | Kanefusa Kabushiki Kaisha | Verarbeitungsverfahren für die oberfläche eines werkstückes mit einem rotierenden schneidwerkzeug |
DE102014212160A1 (de) * | 2014-06-25 | 2015-12-31 | Robert Bosch Gmbh | Tragbare Werkzeugmaschine |
DE102014212158A1 (de) * | 2014-06-25 | 2015-12-31 | Robert Bosch Gmbh | Tragbare Werkzeugmaschine |
JP6504440B2 (ja) * | 2015-02-06 | 2019-04-24 | 舛田 高吉 | 塗膜剥離工具用替え刃の使用方法 |
CN104589436B (zh) * | 2015-02-09 | 2016-10-12 | 金湖县唐港秦庄木材加工厂 | 托盘底脚开槽机专用平齿圆角刀具 |
CN107639704B (zh) * | 2017-10-24 | 2023-07-21 | 杭州一楠五金工具有限公司 | 复合木板切割机刀片及切割方法 |
KR102158104B1 (ko) * | 2019-02-21 | 2020-09-21 | 신성델타테크 주식회사 | 합성수지 제품의 후처리공구 |
KR102158107B1 (ko) * | 2019-02-21 | 2020-09-21 | 신성델타테크 주식회사 | 사출물의 후처리장치 |
USD959949S1 (en) * | 2021-07-14 | 2022-08-09 | Jiangsu Oubo Information Technology Co., Ltd. | Chamfer plane |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1190634B (de) * | 1959-06-15 | 1965-04-08 | Ludwin Oppold | Fraeskopf |
DE2115226B1 (de) * | 1971-03-30 | 1972-11-16 | ||
DE2502514A1 (de) * | 1975-01-22 | 1976-07-29 | Ludwin Oppold | Messerkopf zum bearbeiten von holz und kunststoff |
DE3102065A1 (de) * | 1980-03-08 | 1982-03-25 | Eugen Lutz GmbH u. Co Maschinenfabrik, 7130 Mühlacker | Messerhalterung fuer messerwellen oder messerkoepfe |
DE3043146A1 (de) * | 1980-11-15 | 1982-07-08 | Thomas-Werkzeuge, 5600 Wuppertal | Messerkopf |
DE3327026A1 (de) * | 1983-07-27 | 1985-02-07 | Heinrich 6127 Breuberg Wascheroh | Fraesmesserkopf fuer die holzbearbeitung |
DE3438341A1 (de) * | 1984-10-19 | 1986-04-30 | Hartwig 3538 Marsberg Heine | Klemmsystem fuer umlaufende schneidwerkzeuge |
FR2686819A1 (fr) * | 1992-02-03 | 1993-08-06 | Sicerm | Dispositif de securite pour fraise a couteaux rapportes. |
DE29608603U1 (de) * | 1996-05-11 | 1996-08-01 | Romi-Technik Werkzeug- und Maschinenhandels GmbH, 77933 Lahr | Messerkopf |
DE19536559A1 (de) * | 1995-10-02 | 1997-04-03 | Bosch Gmbh Robert | Hobelmaschine, insbesondere Handhobelmaschine |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE915265C (de) | 1951-09-29 | 1954-07-19 | Paul Kirsten Dr Ing | Messerwelle fuer Holzbearbeitungsmaschinen mit keilartig wirkenden Druckleisten |
CH650431A5 (fr) | 1983-02-09 | 1985-07-31 | Samvaz Sa | Outil de coupe a couteaux amovibles. |
-
1997
- 1997-04-26 DE DE19717706A patent/DE19717706A1/de not_active Withdrawn
-
1998
- 1998-03-25 JP JP54646498A patent/JP2002508716A/ja active Pending
- 1998-03-25 EP EP98928065A patent/EP0977654B1/de not_active Expired - Lifetime
- 1998-03-25 WO PCT/DE1998/000869 patent/WO1998048985A1/de active IP Right Grant
- 1998-03-25 CN CN98804490A patent/CN1089053C/zh not_active Expired - Fee Related
- 1998-03-25 DE DE59803341T patent/DE59803341D1/de not_active Expired - Fee Related
- 1998-03-25 US US09/403,816 patent/US6249982B1/en not_active Expired - Fee Related
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1190634B (de) * | 1959-06-15 | 1965-04-08 | Ludwin Oppold | Fraeskopf |
DE2115226B1 (de) * | 1971-03-30 | 1972-11-16 | ||
DE2502514A1 (de) * | 1975-01-22 | 1976-07-29 | Ludwin Oppold | Messerkopf zum bearbeiten von holz und kunststoff |
DE3102065A1 (de) * | 1980-03-08 | 1982-03-25 | Eugen Lutz GmbH u. Co Maschinenfabrik, 7130 Mühlacker | Messerhalterung fuer messerwellen oder messerkoepfe |
DE3043146A1 (de) * | 1980-11-15 | 1982-07-08 | Thomas-Werkzeuge, 5600 Wuppertal | Messerkopf |
DE3327026A1 (de) * | 1983-07-27 | 1985-02-07 | Heinrich 6127 Breuberg Wascheroh | Fraesmesserkopf fuer die holzbearbeitung |
DE3438341A1 (de) * | 1984-10-19 | 1986-04-30 | Hartwig 3538 Marsberg Heine | Klemmsystem fuer umlaufende schneidwerkzeuge |
FR2686819A1 (fr) * | 1992-02-03 | 1993-08-06 | Sicerm | Dispositif de securite pour fraise a couteaux rapportes. |
DE19536559A1 (de) * | 1995-10-02 | 1997-04-03 | Bosch Gmbh Robert | Hobelmaschine, insbesondere Handhobelmaschine |
DE29608603U1 (de) * | 1996-05-11 | 1996-08-01 | Romi-Technik Werkzeug- und Maschinenhandels GmbH, 77933 Lahr | Messerkopf |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2352207A (en) * | 1998-12-07 | 2001-01-24 | Bosch Gmbh Robert | A plane knife with a cutting edge formed on an arc-shaped recess |
GB2352207B (en) * | 1998-12-07 | 2001-07-11 | Bosch Gmbh Robert | Plane knife for planing machines, in particular hand-held planing machines for machining wood |
GB2347381A (en) * | 1999-02-18 | 2000-09-06 | Machell & Sons Ltd W | A method of producing a wood board section with a smooth surface undulation |
Also Published As
Publication number | Publication date |
---|---|
DE59803341D1 (en) | 2002-04-18 |
DE19717706A1 (de) | 1998-10-29 |
EP0977654B1 (de) | 2002-03-13 |
CN1089053C (zh) | 2002-08-14 |
CN1253520A (zh) | 2000-05-17 |
JP2002508716A (ja) | 2002-03-19 |
EP0977654A1 (de) | 2000-02-09 |
US6249982B1 (en) | 2001-06-26 |
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