US3878016A - Process for producing sliced veneer - Google Patents

Process for producing sliced veneer Download PDF

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Publication number
US3878016A
US3878016A US379962A US37996273A US3878016A US 3878016 A US3878016 A US 3878016A US 379962 A US379962 A US 379962A US 37996273 A US37996273 A US 37996273A US 3878016 A US3878016 A US 3878016A
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United States
Prior art keywords
flitches
process according
veneer
adhesive
sheet
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Expired - Lifetime
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US379962A
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English (en)
Inventor
Takeshi Sadashige
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.)
Dantani Plywood Co Ltd
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Dantani Plywood Co Ltd
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Publication date
Application filed by Dantani Plywood Co Ltd filed Critical Dantani Plywood Co Ltd
Priority to GB3425373A priority Critical patent/GB1412903A/en
Priority to US05/452,267 priority patent/US3977449A/en
Priority to US05/508,366 priority patent/US3969558A/en
Application granted granted Critical
Publication of US3878016A publication Critical patent/US3878016A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L5/00—Manufacture of veneer ; Preparatory processing therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/28—Uniting ornamental elements on a support, e.g. mosaics
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1062—Prior to assembly
    • Y10T156/1075—Prior to assembly of plural laminae from single stock and assembling to each other or to additional lamina
    • Y10T156/1077—Applying plural cut laminae to single face of additional lamina

Definitions

  • ABSTRACT In producing a sheet of wood veneer having a large area adaptable for mass-production and adaptable to be made with various wood patterns, a log is divided into a plurality of individual flitches which are subsequently joined by adhesive to form a composite flitch. The composite flitch is subsequently sliced to form a sheet of wood veneer which may be joined to a substrate by adhesive. The sheet of veneer is formed while the wood is maintained with a moisture content more than the fiber saturation point of the wood.
  • FIG. 16 FIG. 21.
  • a log is longitudinally divided into various-sized small flitches and they are subsequently each sliced by means of a slicer or a rotary lather into sheets of thin veneer.
  • the sheets of thinly sliced veneer are cut to have a suitable width by a guillotine or the like.
  • a new process has been devised in the form of an improved veneer with consideration being given to the fact that with a moisture content at or more than the f.s.p. lumber does not undergo the aforementioned phenomena of swelling or shrinking due to changes in the amount of the contained moisture.
  • the flitches have no difficulties as mentioned above as regards to whether they are dry or moist.
  • no inner stress is generated or produced at the joined parts between the flitches, so that no distortion, warp, or cleavage will occur in the veneers sliced from the laminated flitch according to the present invention.
  • any sheets of veneer of wide or large area can be overlaid over a substrate by a single operational step to form a fancy board having desirable patterns of wood grain and inconspicuous joint lines.
  • veneers of narrow area may also be produced as desired.
  • An object of the present invention is to provide a process for industrially mass-producing sliced veneer sheets having desirable patterns and inconspicuous joint-lines in large quantities and in which the veneer sheets have a wide area large enough to cover over an entire substrate in a single operational step without troublesome mending or patching as was required in gluing conventional sliced veneers.
  • Another object of the present invention is to provide a process for industrially mass-producing sliced veneers to be glued over an entire substrate in large quantities and in which the veneer is provided with desirable technological and esthetic patterns, for example checker patterns, mosaic patterns and so on formed by a combination of arrangements of the grain pattern of the wood.
  • desirable technological and esthetic patterns for example checker patterns, mosaic patterns and so on formed by a combination of arrangements of the grain pattern of the wood.
  • a further object of the present invention is to provide a process for industrially mass-producing sliced veneers to be glued over an entire substrate in one operational step thereby reducing the amount of labor required.
  • Still another object of the present invention is to provide a process for industrially mass-producing a fancy board in a single operational step by gluing a sheet of sliced veneer of wide area onto a substrate, and without having to place in order a plurality of small sliced veneers on the substrate one by one as was required heretofore.
  • a process for producing a sheet of wood veneer having a large area adaptable for mass-production and adaptable to be made with various wood patterns includes dividing a log into a plurality of flitches, smoothing the surfaces of the flitches which are subsequently to be joined, applying an adhesive to the smoothed surfaces to be joined, joining the flitches at the adhesivebearing surfaces to form a composite flitch, slicing the composite flitch to the desired thickness to produce a sheet of veneer, and carrying out the above production of the sheet of veneer while maintaining the moisture content of the wood above the fiber saturation point.
  • FIG. 1 is an end view showing the dividing arrangement of a log as related to a first embodiment of the present invention.
  • FIG. 2 is a perspective view of a laminated or composite flitch consisting of divided smaller flitches as related to the same embodiment.
  • FIG. 3 is a perspective view of a sheet of veneer sliced horizontally from the laminated flitch in FIG. 2.
  • FIG. 4 is a perspective view of a sheet of veneer sliced vertically from the laminated flitch in FIG. 2.
  • FIG. 5 is a perspective view of a laminated flitch as related to a second embodiment.
  • FIG. 6 is a perspective view of a sheet of veneer sliced horizontally from the laminated flitch in FIG. 5.
  • FIG. 7 is a perspective view of a sheet of veneer sliced vertically from the laminated flitch in FIG. 5.
  • FIG. 8 is a perspective view of a log as related to a third embodiment.
  • FIG. 9 is a perspective view of a flitch divided from the log shown in FIG. 8.
  • FIG. 10 is a perspective view of a laminated flitch consisting of a plurality of flitches of the type shown in FIG. 9.
  • FIG. 11 is a perspective view showing the slicing step in slicing the laminated flitch in FIG. 10.
  • FIG. 12 is a perspective view of a flitch as related to a fourth embodiment.
  • FIG. 13 is a perspective view of a laminated flitch consisting of a combination of flitches of the type shown in FIG. 12.
  • FIG. 14 is a plan view of a sheet of veneer sliced from the laminated flitch in FIG. 13.
  • FIG. 15 is a plan view of a sheet of sliced veneer as related to a fifth embodiment.
  • FIG. 16 is a plan view of a sheet of sliced veneer as related to the sixth embodiment.
  • FIGS. l7, l8, 19, 20 and 21 are respectively plan views of various examples of sliced veneers as related to a seventh embodiment.
  • FIG. 22 is a plan view of a sheet of sliced veneer overlaid onto a substrate 5 set on a working table 6 for making a fancy board according to an eighth embodiment.
  • FIGS. 23 and 24 are each perspective views showing a finished fancy board overlaid with a sliced veneer.
  • an original log is first divided vertically into small flitches. All of the surfaces of the flitches are then smoothed so that such surfaces may correspond to mating surfaces to be closely joined with each other.
  • the smoothed flitches are arranged to form a large laminated or composite flitch of the required size taking into account the desired pattern for the sliced veneer to be overlaid on a substrate.
  • a laminated flitch formed according to the aforementioned three steps is sliced into a sheet of veneer of desired thickness comprising patterns created by the grain of the wood.
  • the moisture content is more than the f.s.p.
  • the sliced veneer provided according to the aforementioned four steps is finally overlaid and glued onto a substrate by means of hydrophilic adhesive spread all over the surface of the substrate.
  • a hydrophilic adhesive as used herein means a type of adhesive which can be miscible with water, whereby the adhesive is suitable for use preferably in the range of 50-150 g/m".
  • examples of such adhesive include epoxy resin, phenolic resin, resorcinol resin, and the like. These adhesives may be mixed for use so long as they are compatible with each other.
  • dyestuffs there may be added to the hydrophilic adhesives, suitable dyestuffs, pigments or mixtures thereof for the purpose of shading and/or lining.
  • dyestuff thus added diffuses in the direction of the axis of the flitch along the fiber texture and amorphous region due to the capillary phenomena or ionic absorption to provide shading to the cutting ends and the part adjacent thereto of the flitch.
  • the dyestuff does not diffuse to the same extent in the radial and tangential direction.
  • Pigment may be added to the adhesive. However, since the pigment does not diffuse in any direction of the flitch, clear color remains at the lines of the joint.
  • water soluble stain such as alizarine red S and methylene blue or water insoluble stain such as Sudan ll
  • azo type dyestuff and cyanine type dyestuff are used as a dyestuff to be added to the adhesive in the range of 0.1 to 10% by weight.
  • water insoluble dyestuffs the latter is added to the adhesive after dissolving in a solvent miscible with water, for example, alcohol, acetone, or the like.
  • pigment such as titanium white, red iron oxide, chrome yellow, or the like is mixed with the adhesive, and even metallic powder such as gold dust may be used.
  • the sliced veneer thus produced can be glued onto a substrate successively just after slicing, but it is usual to glue it onto a substrate after preserving in storage for a period of time while maintaining the moisture content therein.
  • wood, plywood, particle board, hard board, paper, plastic sheet, cement board, ceramic board, metallic board and so on are all usable.
  • the adhesive a hydrophilic type can be used as described above, it is preferable that it should be an adhesive belonging to the group of thermoplastic resins such as vinyl acetate emulsion, ethylene vinyl-acetate copolymer emulsion or mixtures of the same and belonging to the group of thermosetting resins, such as mixtures of vinyl-acetate emulsion and urea resin, of vinyl-acetate emulsion and phenolic resin, and of ethylene vinyl-acetate copolymer emulsion and phenolic resin.
  • thermoplastic resins such as vinyl acetate emulsion, ethylene vinyl-acetate copolymer emulsion or mixtures of the same
  • thermosetting resins such as mixtures of vinyl-acetate emulsion and urea resin, of vinyl-acetate emulsion and phenolic resin, and of ethylene vinyl-acetate copolymer emulsion and phenolic resin.
  • a sheet of sliced veneer is glued on to the substrate in one operational step through a hot gluing process, and optionally, a plurality of sheets of sliced veneer may be used to obtain a large quantity of fancy board having artistic patterns.
  • the First Embodiment F litches are sawed off from a log (80% moisture content) as shown in FIG. 1 and are joined with eposy resin adhesive as shown in FIG. 2.
  • Slices or sheets of veneer 0.2 mm thick as shown in FIGS. 3 and 4 are obtained by slicing the thus obtained laminated flitch perpendicularly to the joined surface. All of the aforementioned processes are carried out with the moisture content more than f.s.p. and the thus obtained veneer is maintained with the same moisture content condition.
  • FIG. 1 The Second Embodiment (FIGS. 1, 5, 6 and 7)
  • the log in FIG. 1 80% moisture content) was sawed to make the following flitches as illustrated in FIG. 1;
  • the laminated flitch may be sliced along a horizontal plane as viewed in FIG. 5 into a 0.1 to 0.8mm thick sheet to obtain veneer sheet as shown in FIG. 7 in response to required pattern. These operations are carried out while the wood has moisture content more than the f.s.p. and the moisture content in the original lumber is maintained also in the finished veneers under the same moisture conditions.
  • the Third Embodiment (FIGS. 8ll) Flitches as shown in FIG. 9 are sawed off from a log with a 60% moisture content as is shown in FIG. 8 and are smoothed at all the surfaces and combined together as in FIG. 10 by means of resorcinol resin adhesive to form a checker pattern.
  • the laminated flitch is sliced in the manner shown in FIG. 11. All of the aforementioned steps are carried out with a moisture content of 60% and the sheet of veneer is maintained with the same moisture content.
  • the Fourth Embodiment (FIGS. 12-14) Flitches as shown in FIG. 12 are sawed from a log with a l% moisture content and are arranged and combined with each other to obtain a laminated flitch as shown in FIG. 13 by using urea resin adhesive in which 1% of Alizarine red S is added as a dyestuff.
  • the top surface of the laminated flitch as seen in FIG. 13 consists of a combination of ranks or rows in which radial or tangential sections and cross sections of the sawed flitches are arranged alternately in an orderly manner, to obtain a pattern which looks like a kind of wickerwork pattern.
  • curved flitches which are sawed from a log with a 35% moisture content are joined together by means of epoxy resin adhesive with 3% titanium deoxide.
  • the joined flitch is sliced to make 0.3mm thick veneer sheets having a curved groove pattern. The same percentage of moisture content is maintained during the processing steps.
  • a sliced veneer may be provided with a groove in the form of a picture-frame pattern.
  • the Seventh Embodiment (FIGS. 17-21)
  • Various patterns or combination of patterns may be provided on the flitches as indicated in the prior embodiments and many different kinds of sliced veneers with different patterns can be formed.
  • the arrangement may include the grain pattern shown in FIG. 17 or FIG. 18, the V pattern shown in FIG. 19, the striped pattern shown in FIG. 20 and the laid-bricks pattern in FIG. 21.
  • Sliced veneer 3 having a striped pattern such as shown in FIG. 20 or in the other embodiments is overlaid onto a sheet of plywood using vinyl-acetate emulsion as the adhesive and then grooves are made in the surface of the sliced veneer along the joint lines 4, thereby producing a fancy plywood.
  • reference numeral 5 indicates a sheet of plywood
  • 6 indicates a working table
  • 7 and 8 indicate stopper mark means.
  • FIG. 23 shows one of the sliced sheets of veneer as produced in the aforementioned embodiments glued onto a substrate of desirable size, for example plywood in this case, with vinyl-acetate emulsion being used as the adhesive employing the hot gluing process.
  • FIG. 24 shows the sheet of veneer on the substrate. After slicing and during storage the moisture content of the veneer sheet is maintained.
  • the aforementioned process may be used for producing fancy board. Wood, plywood, particle board, cement board, paper, plastic sheet, ceramic board or metallic-board are examples of materials which may be used as a substrate.
  • For the adhesive ethylene vinyl-acetate copolymer emulsion, a mixture of the aforementioned emulsion and urea resin, or a mixture of vinyl-acetate emulsion and urea resin may be used.
  • the f.s.p. or fiber saturation point is a point representing the condition in which lumber contains a certain quantity of moisture therein.
  • Moisture in lumber consists of free water which is contained in the cells and bound water which is contained in the cell walls. When moisture in the lumber evaporates during drying, the bound water starts to evaporate after the free water has evaporated.
  • the f.s.p. indicates the condition wherein the cell walls of the lumber is saturated with bound water after all the free water has evaporated. When further evaporation of moisture occurs beyond this point, the lumber starts to shrink and change physically.
  • the moisture content at the f.s.p. is about within the range of 25 to 35% depending on the type of wood.
  • a process for producing wood veneer comprising the steps of dividing a log into a plurality of individual flitches, smoothing the surfaces of the flitches which are subsequently to be joined, applying an adhesive to the smoothed surfaces of the flitches, joining said flitches at said adhesive-bearing surfaces to form a composite flitch, slicing said composite flitch to the desired thickness to produce a veneer, and carrying out the above mentioned steps while maintaining the moisture content of said wood flitches at or above the fiber saturation point.
  • hydrophilic adhesive is one or more substances selected from the group consisting of expoxy resin, phenolic resin, resorcinol resin, ureathan resin, urea resin, melanine resin, and alkyd resin.
  • hydrophilic adhesive is colored by one or more dyestuffs selected from the group consisting of alizarine red S, methylene blue, Sudan ll, azo type dyestuff and cyanine type dyestuff.
  • said hydrophilic adhesive contains a mixture of one or more dyestuffs selected from the group consisting of alizarine red S, methylene blue, and Sudan ll, azo type dyestuff and cyanine type dyestuff and one or more pigments selected from the group consisting of titanium white, red iron oxide, and chrome yellow.
  • said flitches include longitudinal side faces and transverse end faces, and joining said flitches side face-to-side face.
  • said flitches include longitudinal faces and transverse end faces, and joining said flitches at least partly side faceto-end face.
  • said flitches include longitudinal faces and transverse end faces, and joining said flitches at least partly end faceto-end face.
  • a process according to claim 1 including gluing said sheet of sliced veneer to a substrate.
  • a process according to claim 10 wherein said gluing of said sheet of sliced veneer to said substrate is effected utilizing a hydrophilic adhesive with a hot-gluing application.
  • hydrophilic adhesive is a mixture of thermoplastic and thermosetting adhesive.
  • a process according to claim 12 wherein said substrate is made from a material selected from the group consisting of wood, plywood, particle board, hard board, paper, plastic sheet, cement board, ceramic board, and metallic board 16.
  • a process according to claim 1 including providing grooves in said sheet of veneer.
  • a process according to claim 1 including joining said flitches so that the grain of some flitches is generally perpendicular to the grain of other flitches in said composite flitch.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Finished Plywoods (AREA)
  • Manufacture Of Wood Veneers (AREA)
US379962A 1972-07-18 1973-07-17 Process for producing sliced veneer Expired - Lifetime US3878016A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB3425373A GB1412903A (en) 1972-07-18 1973-07-18 Process for producing sliced veneer and fancy plywood therefrom
US05/452,267 US3977449A (en) 1972-07-18 1974-03-18 Process for producing sliced veneer
US05/508,366 US3969558A (en) 1972-07-18 1974-09-23 Veneer sheet of a plurality of thin flat sections of wood

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JP7223072A JPS5443048B2 (US06272168-20010807-M00014.png) 1972-07-18 1972-07-18

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US05/452,267 Continuation-In-Part US3977449A (en) 1972-07-18 1974-03-18 Process for producing sliced veneer
US05/508,366 Division US3969558A (en) 1972-07-18 1974-09-23 Veneer sheet of a plurality of thin flat sections of wood

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5725929A (en) * 1996-08-20 1998-03-10 Fiber Technologies, Inc. Reinforced wood
US6358352B1 (en) * 1999-06-25 2002-03-19 Wyoming Sawmills, Inc. Method for creating higher grade wood products from lower grade lumber
WO2010086051A1 (de) * 2009-01-30 2010-08-05 Fritz Egger Gmbh & Co. Og Verfahren zur herstellung eines bsh-lamellenträgers
US20100324160A1 (en) * 2006-03-06 2010-12-23 Valtion Teknillinen Tutkimuskeskus Composite Containing Modified Hybride Resin Based on Natural Fatty Acids
WO2011098302A1 (en) 2010-02-15 2011-08-18 Hd Wood Technologies Limited Method for producing a veneer
EP2574436A1 (en) * 2011-09-29 2013-04-03 Ludwik Olczyk Method for manufacturing a multilayer blockboard from solid coniferous wood lamella for an increased hardness and abrassion resistance
CN104540652A (zh) * 2012-06-20 2015-04-22 日泉化学株式会社 树脂膜和使用了该树脂膜的平切薄镶板片材以及汽车内装部件
JP2017024301A (ja) * 2015-07-23 2017-02-02 展章 中村 突板の製造方法、突板片、突板、及び突板化粧材

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JPS5414642B2 (US06272168-20010807-M00014.png) * 1974-04-30 1979-06-08
JPS5171371A (ja) * 1974-12-18 1976-06-21 Hitachi Chemical Co Ltd Hatsuhohorisuchirenseikeihinno hyomenhifukuho
JPS51139603A (en) * 1975-05-23 1976-12-02 Tonan Sangyo Kk Method of producing decorated veneers joined by varied grooves
JPS5211275A (en) * 1975-07-17 1977-01-28 Nippon Synthetic Chem Ind Coating of expanded polystyrene
JPS59192600A (ja) * 1983-04-15 1984-10-31 ハマナカ株式会社 発泡ポリスチレン製手芸用芯材の着色法
JPS60219003A (ja) * 1984-04-16 1985-11-01 藤本　照信 松寄せ木柄特厚ツキ板の製造方法
JP6573227B2 (ja) * 2013-12-09 2019-09-11 パナソニックＩｐマネジメント株式会社 化粧単板の製造方法及びこれを用いて製造された化粧単板を備えた木質板状建材の製造方法

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US2772197A (en) * 1954-07-02 1956-11-27 Monsanto Chemicals Plywood process
US3076738A (en) * 1959-01-30 1963-02-05 Uschmann Curt Method of treating and laminating green wood veneer
US3322872A (en) * 1961-10-04 1967-05-30 Bonafide Mills Inc Plastic floor covering
US3580760A (en) * 1969-05-29 1971-05-25 Us Agriculture Process of making laminated wood product utilizing modulus of elasticity measurement
US3669789A (en) * 1969-03-22 1972-06-13 Fuji Photo Film Co Ltd Method of making plastic fiber-optical plates
US3684641A (en) * 1970-11-10 1972-08-15 Int Paper Co Laminated product bonded with colored adhesive
US3730797A (en) * 1970-03-11 1973-05-01 Gutzeitin Laatikkotehdas Ab Oy Method for manufacturing building boards with chequer-square pattern

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Publication number Priority date Publication date Assignee Title
US2772197A (en) * 1954-07-02 1956-11-27 Monsanto Chemicals Plywood process
US3076738A (en) * 1959-01-30 1963-02-05 Uschmann Curt Method of treating and laminating green wood veneer
US3322872A (en) * 1961-10-04 1967-05-30 Bonafide Mills Inc Plastic floor covering
US3669789A (en) * 1969-03-22 1972-06-13 Fuji Photo Film Co Ltd Method of making plastic fiber-optical plates
US3580760A (en) * 1969-05-29 1971-05-25 Us Agriculture Process of making laminated wood product utilizing modulus of elasticity measurement
US3730797A (en) * 1970-03-11 1973-05-01 Gutzeitin Laatikkotehdas Ab Oy Method for manufacturing building boards with chequer-square pattern
US3684641A (en) * 1970-11-10 1972-08-15 Int Paper Co Laminated product bonded with colored adhesive

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5725929A (en) * 1996-08-20 1998-03-10 Fiber Technologies, Inc. Reinforced wood
US6358352B1 (en) * 1999-06-25 2002-03-19 Wyoming Sawmills, Inc. Method for creating higher grade wood products from lower grade lumber
US20100324160A1 (en) * 2006-03-06 2010-12-23 Valtion Teknillinen Tutkimuskeskus Composite Containing Modified Hybride Resin Based on Natural Fatty Acids
WO2010086051A1 (de) * 2009-01-30 2010-08-05 Fritz Egger Gmbh & Co. Og Verfahren zur herstellung eines bsh-lamellenträgers
WO2011098302A1 (en) 2010-02-15 2011-08-18 Hd Wood Technologies Limited Method for producing a veneer
EP2359996A1 (en) 2010-02-15 2011-08-24 HD Wood Technologies Limited Method for producing a veneer
US9855673B2 (en) 2010-02-15 2018-01-02 Hd Wood Technologies Limited Method for producing a veneer
EP2574436A1 (en) * 2011-09-29 2013-04-03 Ludwik Olczyk Method for manufacturing a multilayer blockboard from solid coniferous wood lamella for an increased hardness and abrassion resistance
CN104540652A (zh) * 2012-06-20 2015-04-22 日泉化学株式会社 树脂膜和使用了该树脂膜的平切薄镶板片材以及汽车内装部件
JP2017024301A (ja) * 2015-07-23 2017-02-02 展章 中村 突板の製造方法、突板片、突板、及び突板化粧材

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JPS5443048B2 (US06272168-20010807-M00014.png) 1979-12-18

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