EP2353811A1 - Method and apparatus for dividing a log into pieces of lumber - Google Patents

Method and apparatus for dividing a log into pieces of lumber Download PDF

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Publication number
EP2353811A1
EP2353811A1 EP11152961A EP11152961A EP2353811A1 EP 2353811 A1 EP2353811 A1 EP 2353811A1 EP 11152961 A EP11152961 A EP 11152961A EP 11152961 A EP11152961 A EP 11152961A EP 2353811 A1 EP2353811 A1 EP 2353811A1
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EP
European Patent Office
Prior art keywords
balk
log
grooves
sides
vertical
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.)
Withdrawn
Application number
EP11152961A
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German (de)
English (en)
French (fr)
Inventor
Lauri Miettinen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heinolan Sahakoneet Oy
Original Assignee
Heinolan Sahakoneet Oy
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Filing date
Publication date
Application filed by Heinolan Sahakoneet Oy filed Critical Heinolan Sahakoneet Oy
Publication of EP2353811A1 publication Critical patent/EP2353811A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B1/00—Methods for subdividing trunks or logs essentially involving sawing
    • B27B1/007—Methods for subdividing trunks or logs essentially involving sawing taking into account geometric properties of the trunks or logs to be sawn, e.g. curvature

Definitions

  • the invention relates to a method as set forth in the preamble of claim 1 for working a log and dividing the same into pieces of lumber.
  • the invention relates also to an apparatus as set forth in the preamble of claim 5 for working a log and dividing the same into pieces of lumber.
  • the conventional sawmill line used for working a log and dividing the same into pieces of lumber operates as follows.
  • the first step comprises measuring a debarked log three-dimensionally, e.g. with an optical 3D measuring instrument, to find out precisely its geometrical shape.
  • data is collected regarding e.g. the diameter, conicity, ellipticity, and skewness of the log.
  • the log measurement data is stored in a control unit or the like and utilized in working the log and dividing it into pieces of lumber. If necessary, this is followed by rolling the log with an appropriate rotating device to an optimal position for a saw machine or the like woodworking tool of a sawmill line.
  • the first woodworking tool is generally a chipping canter, to which the log is delivered in a centered manner and by which two opposite sides of the log are trimmed, and at the same time the removed side surface material of the log is chipped.
  • the log becomes a balk.
  • the balk is turned over such that its trimmed flat surface faces downward against a conveyor.
  • This is followed by centering the balk to a second chipping canter, in which its two opposite untreated surfaces are trimmed basically the same way as in the treatment of the preceding first chipping canter.
  • the balk becomes a spar with four trimmed sides.
  • the spar is at least partly wane-edged, meaning that at least some of its lengthwise corners are constituted by a curving surface of the original log.
  • the spar is measured, after which the trimming of spar side slabs and the slicing of side slabs are optimized with a control unit.
  • the optimization comprises determining the dimensions of side slabs obtained from a spar, particularly the width of the slabs, the required elevation and direction for profiling work.
  • the spar is worked with an appropriate profiling machine, whereby the wane edges are dressed in an optimized manner off the side of the spar.
  • a suitable saw machine preferably a circular saw, for sawing first side slabs off the profiled spar.
  • the saw machine is preceded by a first pair of servo controlled side rolls for directing the spar in a correct position to the saw machine.
  • the remaining segment of the spar is turned over through 90 degrees by means of a rotating device and the spar is fed again to the profiling machine, which dresses the spar edges in an optimized manner for second side slabs.
  • the rest of the spar is chopped with an appropriate saw, such as a board saw, into pieces of lumber.
  • the board saw is preceded by a second pair of servo controlled side rolls for directing the spar in a correct position to the saw machine.
  • a problem with sawmill lines as described above is being structurally long lines.
  • various operations require a specified unit whose length is basically equal to the maximum length of a log being processed.
  • a drawback here is that such a long sawmill line occupies plenty of space which is expensive to build.
  • Finnish patent FI-73905 discloses a method and apparatus for shaving tree trunks or logs into a wood product processed from all sides, such as boards and beams.
  • the wane edges of four-way trimmed tree trunks are milled in a rectangular manner, followed by removing at least two side slabs by sawing.
  • the milling heads for wane edges are fitted not only with a chopping blade but also with a circular saw blade, the latter providing a smooth sawn surface on the narrow sides of the side slabs and providing dimensionally precise side slabs.
  • the four-side trimming of a tree trunk is imple-mentable e.g. as described in Patent specification US-3742993 .
  • Finnish patent FI-104316 discloses a method and apparatus for processing a tree trunk or log by shaving, which comprises measuring the tree trunk with a log measuring instrument three-dimensionally, transferring data to a control unit, and determining a processing center line for the tree trunk and processing center lines as well as widths for side slabs, after which the work on the tree trunk begins.
  • the tree trunk has its sides trimmed with a chipping canter so as to have four trimmed sides, i.e. it has been worked into a quadrangular spar.
  • the spar has side cuts milled on its opposite sides by specifically operating milling tool heads, thus also removing possible wane edges of the spar and side slabs being sawn off the spar.
  • the sawing-off of side slabs is performed prior to the edging of side cuts, the latter being implemented with milling tool heads.
  • An objective of the method and apparatus according to the invention is to eliminate problems relating to prior known sawmill lines and/or chipping canter lines. Another objective is to provide a new method and apparatus, which enable reducing physically the length of a sawmill line or the like log processing line and improving the yield of sawn timber or sawn pieces of lumber.
  • a method of the invention is characterized by what is presented in claim 1.
  • An apparatus of the invention is characterized by what is presented in claim 5.
  • the method according to the invention for working a log and dividing the same into pieces of lumber comprises feeding the log onto a processing line and advancing the same through process steps as follows:
  • the method further comprises
  • step e is followed by
  • the above-mentioned sequential process steps are conducted along the processing line in such a way that a part of the log is in one process step while another part thereof is in the immediately preceding process step.
  • at least two successive process steps are provided within a range whose length does not exceed that of the log, the maximum length being preferably 6 m.
  • said apparatus comprises a processing line, along which the log is advanced forward on one or more conveyors and treated in treatment units included in the processing line principally by means of treatment programs stored in an appropriate data processing unit, said treatment units including:
  • the apparatus further comprises:
  • the apparatus further comprises:
  • the apparatus has at least some of its sequential treatment units, particularly the first chipping canter, the first profiling machine, and the first saw machine, or, alternatively, said treatment units and the second profiling machine and the saw machine assembly relevant thereto, disposed on the processing line close to each other in such a way that at least two successive log treatment units are provided within a range whose length does not exceed that of the log.
  • An advantage of the invention is its capability of implementing the processing line in the configuration of a short and efficient line. This provides savings in manufacturing and installation costs and, moreover, it is economically more favorable to cover a short line than a long line.
  • Another specific advantage of the invention is that some of the essential and important process steps and treatment units are most preferably disposed close to each other, especially the successive process steps/treatment units, within a range whose length does not surpass that of the log, being 6 m at a maximum.
  • the method according to the invention for working a log and dividing the same into pieces of lumber is illustrated sequentially in a flow chart in fig. 1 .
  • the method comprises feeding 101 a log onto a processing line 201 and advancing the same through process steps to follow.
  • a first step a comprises measuring 102 a log T three-dimensionally with a log measuring instrument, such as a 3D scanner (cf. fig. 3a ).
  • a log measuring instrument such as a 3D scanner (cf. fig. 3a ).
  • the log's geometrical shape such as conicity, ellipticity and skewness, and at the same time - if necessary - its position on a conveyor, is thereby found out.
  • a second step b comprises storing 103 measurement data relevant to the log T.
  • a third step c comprises checking the position of a log on a conveyor and rolling 104 the log over with a rotating device, such that a possible skewness L (i.e. a curved section) faces upward ( fig. 3b ).
  • a fourth step d comprises feeding a log to an appropriate first working machine, wherein the first two vertical and most preferably substantially flat sides, i.e. a first side and a second side s1, s2, are trimmed 105 on the log at its opposite sides and thereby the log is turned into a first balk P1 ( fig. 3c ).
  • the method further comprises at least a fifth e, a sixth f, and a seventh g step as follows.
  • the fifth step e comprises milling first and second grooves u11, u21; u12, u22 in top and bottom parts of each vertical side s1, s2 of the first balk P1 ( fig. 3d ).
  • Each groove u11, u21; u12, u22 has one of its groove flanks us1, us2; us3, us4 adjacent to the vertical side s1, s2 of the balk P1.
  • the groove u11, u21; u12, u22 has its groove flank us1, us2; us3, us4 at a right angle relative to the side s1, s2 of the balk P1.
  • the grooves u11, u21; u12, u22 serve to define on the trimmed side s1, s2 of the balk P1 in an appropriate direction at least first and second straight side slabs L1, L2. This is performed in an optimized manner according to the log measurement data and the data processing unit's program.
  • the sixth step f comprises removing the side slabs L1, L2, most preferably by sawing 107, from the vertical sides s1, s2 of the first balk P1 ( fig. 3e ).
  • a remaining segment of the first balk P1, i.e. a second balk P2, and the removed side slabs L1, L2 are separated 108 from each other.
  • the side slabs L1, L2 are dropped onto a suitable crosswise conveyor and carried to a further treatment of side slabs.
  • the second balk P2 is conveyed to a further treatment 109 along the processing line 201.
  • the fifth step e is followed by an additional step e1, wherein third and fourth grooves u31, u41; u32, u42 are milled 106a in top and bottom parts of each vertical side s1, s2 of the first balk P1 alongside the first and second grooves u11, u21; u12, u22 ( fig. 3f ).
  • the third and fourth grooves u31, u41; u32, u42 are milled with appropriate milling heads most preferably on the side of the balk P1 which is till untreated.
  • the third and fourth grooves u31, u41; u32, u42 have one of their groove flanks us5, us6, us7, us8 adjacent to the first and second grooves u11, u21; u12, u22, respectively, and have it preferably at a right angle relative to the vertical side s1, s2 of the balk.
  • the third and fourth grooves u31, u41; u32, u42 serve to define third and fourth substantially straight side slabs L3, L4 on the trimmed sides s1, s2 of the balk P1. This is conducted in an optimized manner according to the log measurement data and the data processing unit's program.
  • the sixth and seventh steps f and g which are to be performed subsequent to the additional step e1, are supplemented with additional steps f1 and g1.
  • the sixth step f has its additional step f1 adapted to removing all side slabs L1, L2, L3, L4 by sawing 107a from the vertical sides of the first balk P1 with an appropriate saw machine ( fig. 3g ).
  • the seventh step g has its additional step g1 adapted to separating 108 a remaining segment of the first balk P1, i.e. a second balk P2, and all the removed side slabs L1, L2, L3, L4 from each other and particularly to advancing the second balk P2 to a further treatment 109.
  • the successive process steps are conducted along the processing line 201 in such a way that a part of the log T is in one process step while at the same time another part thereof is in the preceding process step.
  • the log T has its leading end in one process step, such as in the fifth step e, in which the grooves u11, u21; u12, u22 are being milled on the balk P1, while the log T has its middle section (or at least its trailing end) in the preceding process step, such as in the fourth step d, in which the log is being trimmed along its vertical sides.
  • the log lies simultaneously in three successive process steps.
  • the log T has its leading end for example in the sixth step f, in which the side slabs L1, L2 (L3, L4) are being removed by sawing from the vertical sides s1, s2 of the first balk P1, the log T has its middle section in the fifth step e, in which the grooves u11, u21; u12, u22 (u31, u41; u32, u42) are being milled on the balk P1, and the log T has its trailing end in the fourth step d, in which the log's vertical sides are being trimmed.
  • What is essential in this embodiment of the invention is that at least two successive log processing steps are fitted within a range A, the length of which does not exceed that of the log, being preferably between 5 and 7 m, most preferably 6 m.
  • the further treatment 109 of the second balk P2 comprises at least four successive steps as follows: steps from eighth to eleventh.
  • An eighth step h comprises measuring and overturning 110 the second balk P2 on one of its trimmed sides s10 (or s20), i.e. the second balk P2 is rotated over 90 degrees ( fig. 3h ). Measurements of the second balk P2 serve to check the balk dimensions, and particularly with regard to the trimmed sides s1, s2.
  • a ninth step i comprises feeding the second balk P2 to an appropriate second working machine and trimming 111 the untreated opposite sides of the second balk P2 for substantially vertical third and fourth sides s3, s4 ( fig. 3i ).
  • the second balk P2 is turned into a substantially quadrangular spar P3, the edges of which are generally at least partially wane.
  • the spar P3 has the marginal areas of its four sides, i.e. the edges thereof, milled 112 with suitable profiling machines for grooves u8, u9, u10, u11, which are used for defining side slabs on the vertical trimmed third and fourth sides ( fig. 3j ).
  • An eleventh step comprises removing side slabs L5, L6 from the spar's vertical side by sawing and, most preferably, the remaining spar is sawn 113 at the same time into appropriate pieces of lumber with a suitable saw machine ( fig. 3k ).
  • FIG. 2 An apparatus of the invention for working and sawing a log is specifically illustrated in fig. 2 .
  • the apparatus according to the invention for working a log and dividing the same into pieces of lumber comprises a processing line 201, wherein a log is advanced (in the direction indicated by an arrow B) on one or more conveyors 2011.
  • a log T is treated at treatment units, included in the processing line 201, principally in accordance with treatment programs stored in an appropriate data processing unit 202, such as a computer, with a primary target of optimizing the log treatment in order to maximize the yield of pieces of lumber obtained from the log.
  • the treatment units of this apparatus comprise at least units as follows: a log measuring instrument 203, a log rotating device 204, and a first chipping canter 205.
  • the apparatus further comprises at least treatment units as follows: a first profiling machine 206, a first saw machine assembly 207, and a separating unit 208.
  • the treatment units are arranged along the processing line successively, most preferably in the presented sequence.
  • the log measuring instrument 203 such as an optical 3D scanner, is a device conducting a measurement of the log T three-dimensionally (cf. fig. 3a ).
  • the log measuring instrument is used e.g. for measuring cross-sections of the log in a lengthwise direction of the log at conveniently small intervals. This enables finding out the geometrical shape of a log, such as conicity, ellipticity, and skewness. Revealed at the same time are location and position of the log T on top of the conveyor 2011.
  • Measurement data of the log T is stored in a suitable memory unit 2021, which is most preferably associated with the data processing unit 202.
  • the log rotating device 204 is a device, by means of which a log is to be rolled over for bringing a possible skewness L to point upward ( fig. 3b ). This is the position, in which the log T will be treated in the next treatment unit.
  • the first chipping canter 205 comprises preferably two chipping discs 205a, 205b and/or the like chipping tools.
  • the first chipping canter 205 is used for making first two vertical, substantially straight sides, i.e. a first side and a second side s1, s2, on the log T at its opposite sides, thus turning the log into a first balk P1 ( fig. 3c ).
  • the first profiling machine 206 comprises most preferably four milling heads.
  • the profiling machine's 206 milling heads are used for milling first and second grooves u11, u21; u12, u22 lengthwise of the first balk P1 in top and bottom parts of each vertical side s1, s2 of the balk ( fig. 3d ).
  • Each groove u11, u21; u12, u22 has one of its groove flanks us1, us2, us3, us4 arranged to lie adjacent to a vertical side of the balk P1 and in such a way that said flank is at a right angle relative to this side.
  • the first and second grooves are used for defining at least first and second substantially straight side slab L1, L2 on the trimmed sides s1, s2 of the balk P1.
  • the location and dimensions of the side slab L1, L2 are determined most preferably in an optimized manner in accordance with data obtained from the log measuring instrument 203 and a treatment program stored in the data processing unit 202.
  • the first saw machine 207 comprises suitable blade units 207a, 207b, by means of which the side slabs L1, L2 are cut off the vertical sides s1, s2 of the first balk P1 by sawing ( fig. 3e ).
  • the separating unit 208 comprises e.g. an open-side conveyor 208a, such as a conveyor chain, which is co-directional with the processing line 201.
  • the side slabs L1, L2 are adapted to fall by gravity on top of a crosswise conveyor 208b set for side slabs underneath the conveyor 208a while at the same time advancing the second balk P2 to a further treatment on the conveyor 208a and the processing line 201.
  • the apparatus further comprises a second profiling machine 2061 and a second saw assembly 2071.
  • the second profiling machine 2061 comprises most preferably four milling heads.
  • the second profiling machine 2061 is positioned downstream of the first profiling machine 206 in the log T conveying direction B.
  • the second profiling machine 2061 has its four milling heads adapted to mill third and fourth grooves u31, u41; u32, u42 in top and bottom parts of each vertical side s1, s2 of the first balk P2 alongside the first and second grooves u11, u21; u12, u22, particularly on the untreated surface side of the balk P1 ( fig. 3f ).
  • the third and fourth grooves u31, u41; u32, u42 have one of their groove flanks us5, us6, us7, us8 to lie adjacent to the first and second grooves u11, u21; u12, u22, respectively, and to lie preferably at a right angle relative to the vertical side s1, s2 of the balk.
  • the third and fourth grooves u31, u41; u32, u42 are used for defining third and fourth straight side slabs L3, L4 on the trimmed sides s1, s2 of the balk. In this case as well, the location and dimensions of the side slab L1, L2 are determined most preferably in an optimized manner in accordance with data obtained from the log measuring instrument 203 and a treatment program stored in the data processing unit 202.
  • the second saw assembly 2071 comprises appropriate blade units 2071 a, 2071 b. It is positioned downstream of the first saw machine assembly 207 in the log T conveying direction B. Alternatively, the first and second saw assemblies 207, 2071 are integrated for a single saw machine assembly, comprising blade units 207a, 2071 a, 207b, 2071 b.
  • the blade units 2071 a, 2071 b of the second saw assembly 2071 are used for cutting the third and fourth side slabs L3, L4 by sawing off the first balk's P1 vertical sides, most preferably immediately after cutting off the first and second side slabs L1, L2 ( fig. 3g ).
  • the saw assembly 207, 2071 is followed by the separating unit 208, 208a in the log T conveying direction B.
  • This treatment unit enables separating a remaining segment of the first balk, i.e. a second balk P2, and the removed side slabs L1, L2, L3, L4 from each other, and particularly advancing the second balk P2 to a further treatment along the processing line 201.
  • At least some of the successive treatment units of the apparatus are arranged on the processing line 201 close to each other in such a way that at least two successive log treatment units are positioned within a range which is not more than equal to the log in length, at a maximum 6 m.
  • a part of the log T is on the processing line 201 subjected to a treatment by one treatment unit while a part of it is subjected to a treatment by the preceding treatment unit.
  • the log T has its leading end in one treatment unit, such as subjected to a treatment by the first profiling machine 206 with the grooves u11, u21; u21, u22 being milled on the balk P1, while the log T has its middle section (or at least its trailing end) in the preceding treatment unit, such as subjected to a treatment by the first chipping canter 205 with the log's T vertical sides s1, s2 being trimmed.
  • the log T lies simultaneously in three successive treatment units.
  • the log T has its leading end for example in the first saw assembly 207, in which the side slabs L1, L2 are being removed by sawing from the first balk's P1 vertical sides, the log T has its middle section in the first profiling machine 206, in which the grooves u11, u21; u21, u22 are being milled on the balk P1, and the log T has its trailing end in the first chipping canter 205, in which the log's vertical sides are being trimmed.
  • the apparatus comprises treatment units on the processing line 201 which are suitable for a further treatment of the second balk P2.
  • the further treatment of the second balk P2 is conducted with at least treatment units as follows: a measuring device 209a, a rotating device 209b, a second chipping canter 210, a spar profiling machine 211, and a spar saw machine assembly 212.
  • the second balk P2 comprises two opposite trimmed sides s10, s20, which remain along the balk's sides after the side slabs L1, L2; L3, L4 have been removed.
  • the measuring device 209a is used for checking dimensions of the second balk P2 after the removal and separation of the side slabs L1, L2 (and possibly L3, L4), and the measurement data is (most preferably stored and) handed over to the data processing unit 202 for checking the optimization relevant to dividing the balk P2 into pieces of lumber.
  • the second balk P2 is turned over by the rotating device 209 first through 90 degrees, i.e. sideways to lie on its trimmed side s10 (or s20) and on a conveyor 2011 ( fig. 3h ). This is followed by feeding the second balk P2 to the second chipping canter 210, which is provided with two chipping discs 210a, 210b and/or the like chipping elements.
  • the second chipping canter 210 is used for trimming and dressing the untreated opposite sides of the turned-over second balk P2 for substantially vertical third and fourth sides s3, s4, and thereby the second balk P2 is turned into a basically four-edged spar P3 ( fig. 3i ).
  • the spar P3 is delivered to the spar profiling machine 211, which most preferably comprises four milling heads.
  • the fringe area or edges of the spar's four sides are milled for appropriate grooves u8, u9, u10, u11, which are used for defining fifth and sixth side slabs L5, L6 on the vertical third and fourth sides, respectively ( fig. 3j ). Thereby is obtained a profiled spar P3.
  • the location and dimensions of the side slab L5, L6 are determined (like most preferably also the entire division of the spar P3 into pieces of lumber) most preferably in an optimized manner on the basis of data obtained from the log measuring instrument 203 and a treatment program stored in the data processing unit 202.
  • the profiled spar is fed to the spar saw machine assembly 212 used for sawing the side slabs L5, L6 off the spar's vertical sides and, preferably, the remaining spar is also cut with the same saw machine assembly into suitable pieces of lumber ( fig. 3k ).
  • the spar saw machine assembly 212 comprises e.g. a ring saw, a bandsaw or the like.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
EP11152961A 2010-02-02 2011-02-01 Method and apparatus for dividing a log into pieces of lumber Withdrawn EP2353811A1 (en)

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Application Number Priority Date Filing Date Title
FI20105090A FI20105090A7 (fi) 2010-02-02 2010-02-02 Menetelmä ja laitteisto tukin työstämiseksi ja jakamiseksi puukappaleisiin

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EP2353811A1 true EP2353811A1 (en) 2011-08-10

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FI (1) FI20105090A7 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2439030A1 (en) * 2010-10-11 2012-04-11 Heinolan Sahakoneet OY Method and apparatus for machining and dividing a cant into pieces of timber
RU2492042C1 (ru) * 2012-06-18 2013-09-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Тихоокеанский государственный университет" Способ продольного раскроя круглых лесоматериалов

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3742993A (en) 1969-04-15 1973-07-03 A Landers Machine for cutting peeler cores on logs into studs and chips
US4327789A (en) * 1979-07-18 1982-05-04 Gebruder Linck, Maschinenfabrik Und Eisengiesserei "Gatterlinck" Method and apparatus for the chipping dissection of tree logs into all-round machined lumber products
FI73905B (fi) 1979-05-09 1987-08-31 Linck Maschf & Eisen Foerfarande och anordning foer spaonskaerande soenderdelning av stockar i allsidigt bearbetade traeprodukter.
US4879659A (en) * 1987-11-24 1989-11-07 Bowlin William P Log processing systems
US5421386A (en) * 1991-06-17 1995-06-06 Ari Ab Breakdown of logs
EP0785052A1 (en) * 1996-01-19 1997-07-23 RAUTIO, Kauko Procedure and apparatus for working a tree trunk by chipping
WO2005087459A1 (en) * 2004-03-17 2005-09-22 Anssi Partanen Method and plant for sawing a log

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3742993A (en) 1969-04-15 1973-07-03 A Landers Machine for cutting peeler cores on logs into studs and chips
FI73905B (fi) 1979-05-09 1987-08-31 Linck Maschf & Eisen Foerfarande och anordning foer spaonskaerande soenderdelning av stockar i allsidigt bearbetade traeprodukter.
US4327789A (en) * 1979-07-18 1982-05-04 Gebruder Linck, Maschinenfabrik Und Eisengiesserei "Gatterlinck" Method and apparatus for the chipping dissection of tree logs into all-round machined lumber products
US4879659A (en) * 1987-11-24 1989-11-07 Bowlin William P Log processing systems
US5421386A (en) * 1991-06-17 1995-06-06 Ari Ab Breakdown of logs
EP0785052A1 (en) * 1996-01-19 1997-07-23 RAUTIO, Kauko Procedure and apparatus for working a tree trunk by chipping
FI104316B (fi) 1996-01-19 1999-12-31 Rautio Kauko Johannes Menetelmä ja laitteisto puunrunkojen käsittelemiseksi lastuamalla
WO2005087459A1 (en) * 2004-03-17 2005-09-22 Anssi Partanen Method and plant for sawing a log

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2439030A1 (en) * 2010-10-11 2012-04-11 Heinolan Sahakoneet OY Method and apparatus for machining and dividing a cant into pieces of timber
RU2492042C1 (ru) * 2012-06-18 2013-09-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Тихоокеанский государственный университет" Способ продольного раскроя круглых лесоматериалов

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FI20105090A0 (fi) 2010-02-02
FI123149B (enrdf_load_stackoverflow) 2012-11-30
FI20105090A7 (fi) 2011-08-03

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