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EP0194238A2 - A process for forming floor boards on a plywood base and a board thus realized - Google Patents

A process for forming floor boards on a plywood base and a board thus realized Download PDF

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Publication number
EP0194238A2
EP0194238A2 EP86830050A EP86830050A EP0194238A2 EP 0194238 A2 EP0194238 A2 EP 0194238A2 EP 86830050 A EP86830050 A EP 86830050A EP 86830050 A EP86830050 A EP 86830050A EP 0194238 A2 EP0194238 A2 EP 0194238A2
Authority
EP
European Patent Office
Prior art keywords
layer
fibres
board
valuable
plywood
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.)
Granted
Application number
EP86830050A
Other languages
German (de)
French (fr)
Other versions
EP0194238B1 (en
EP0194238A3 (en
Inventor
Guglielmo Giordano
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.)
VIAROM Srl
Original Assignee
VIAROM Srl
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by VIAROM Srl filed Critical VIAROM Srl
Priority to AT86830050T priority Critical patent/ATE64169T1/en
Publication of EP0194238A2 publication Critical patent/EP0194238A2/en
Publication of EP0194238A3 publication Critical patent/EP0194238A3/en
Application granted granted Critical
Publication of EP0194238B1 publication Critical patent/EP0194238B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E04F15/04—Flooring or floor layers composed of a number of similar elements only of wood or with a top layer of wood, e.g. with wooden or metal connecting members
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F2201/00—Joining sheets or plates or panels
    • E04F2201/04—Other details of tongues or grooves
    • E04F2201/043—Other details of tongues or grooves with tongues and grooves being formed by projecting or recessed parts of the panel layers

Definitions

  • the invention refers to a development of the prior patent No. 9456 A/84 filed by the same inventor on 11 July 1984.
  • a board for wooden floors is made up of an upper layer with viewable face, mostly of valuable wood, matched with a lower layer having a plywood construction and thus with sheets having the fibres pattern both orthogonal and parallel to that of the valuable layer; the valuable layer - intended to form the viewable face - has a longitudinal fibres pattern and the lower plywood layer has transverse grooves being thus orthogonal to the fibres pattern of the upper layer.
  • the lower layer has the fibres patterns of the external sheets or thicknesses perpendicular to those of the upper valuable layer and, therefore, parallel to the grooves.
  • the lower plywood layer has five sheets or thicknesses, the intermediate thickness and the two external ones of said lower plywood layer having fibres being transverse in respect to those of the upper valuable layer.
  • the lower plywood layer has the two outer thicknesses or sheets with a fibres pattern transverse in respect to that of the upper valuable layer, and the intermediate sheet - single or double with a fibres pattern parallel to that of the upper valuable layer.
  • the proposed solution is particularly suitable for boards being relatively wide in respect to their length.
  • the above mentioned transverse grooves may be deeply cut to involve at least most of the thickness of the lower layer. More particularly, the grooves may have a width of the order of at least 3 mm and such a depth as never to penetrate the upper layer and not to indent the adhesive veil which unites the valuable- wood board to the lower plywood layer.
  • the side cogs and slots for the installation joint are formed in the lower plywood layer.
  • the prior patent relates also to a process for realizing the above mentioned wood boards for floors, having advantages as for rapidity and economy in the production.
  • the process for realizing the above described boards for floors and, especially, relatively short and wide boards comprises: making a multi-layer panel to form a structure of plywood type; matching said panel with a plurality of elements made of a material - mostly valuable - intended to form the upper layers of the boards, said elements being spaced between them and with the fibres patterns orthogonal to those of the outer layers of the plywood panel; making grooves - mostly by a milling operation - in the lower layer, parallel to the fibres patterns of the outer plywood layers and, therefore, perpendicular to the fibres pattern of said elements; and the separating operation to create the boards and the operation to form the joint cogs and slots.
  • a floor board is made up of an upper layer 21 of valuable wood and a lower layer 23 consisting of two external plywood sheets 23A, 23B, and two intermediate sheets 23C.
  • the fibres pattern of the layer 21 and of sheets 23C is longitudinal, that is, lying in the direction fL of the board length; the fibres pattern of sheets 23A and 23B is orientated in the transverse direction fT.
  • the cross sections taken on planes perpendicular to the fibres are conventionally squared and the cross-sections parallel to the fibres pattern show a wide, wavy hatching.
  • transverse grooves 25 are cut out parallel to the direction fT and suitably spaced apart for the function already pointed out.
  • the depth of the grooves does not go beyond the glueing surface 27 between 21 and 23B, and may also not go beyond the glueing surface 29 between 23B and 23C.
  • the boards have rib projections 30 and channel recesses 32 - shown only in Fig.2 - to form the joints. Both the projections and the channels are formed from the layer 23.
  • Fig.2 shows a five-layer plywood, a central layer 23E bezng interposed between the thicknesses or sheets 23C; the sheet or thickness 23E has the fibres pattern parallel to that of thicknesses 23A and 23B.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Floor Finish (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Finished Plywoods (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
  • Telephonic Communication Services (AREA)
  • Collating Specific Patterns (AREA)
  • Television Systems (AREA)

Abstract

The board for wooden floors consists of an upper layer (21) with viewable face, mostly of valuable wood, matched with a lower layer (23) having plywood construction; the valuable layer making up the viewable face, has a longitudinal fibres pattern and the lower plywood layer has transverse grooves (25) being thus at right angles to the fibres pattern of the upper layer (21); the external sheets (23A, 23B) of this lower plywood layer have their fibres at right angles to those of the valuable layer (21) and therefore, parallel to the grooves (25).

Description

  • The invention refers to a development of the prior patent No. 9456 A/84 filed by the same inventor on 11 July 1984.
  • According to this prior patent, a board for wooden floors is made up of an upper layer with viewable face, mostly of valuable wood, matched with a lower layer having a plywood construction and thus with sheets having the fibres pattern both orthogonal and parallel to that of the valuable layer; the valuable layer - intended to form the viewable face - has a longitudinal fibres pattern and the lower plywood layer has transverse grooves being thus orthogonal to the fibres pattern of the upper layer.
  • According to the present invention, the lower layer has the fibres patterns of the external sheets or thicknesses perpendicular to those of the upper valuable layer and, therefore, parallel to the grooves.
  • In a possible embodiment, the lower plywood layer has five sheets or thicknesses, the intermediate thickness and the two external ones of said lower plywood layer having fibres being transverse in respect to those of the upper valuable layer.
  • According to another feasible embodiment, the lower plywood layer has the two outer thicknesses or sheets with a fibres pattern transverse in respect to that of the upper valuable layer, and the intermediate sheet - single or double with a fibres pattern parallel to that of the upper valuable layer.
  • The proposed solution is particularly suitable for boards being relatively wide in respect to their length.
  • The above mentioned transverse grooves may be deeply cut to involve at least most of the thickness of the lower layer. More particularly, the grooves may have a width of the order of at least 3 mm and such a depth as never to penetrate the upper layer and not to indent the adhesive veil which unites the valuable- wood board to the lower plywood layer.
  • In case of boards having mounting Joints, the side cogs and slots for the installation joint are formed in the lower plywood layer.
  • The prior patent relates also to a process for realizing the above mentioned wood boards for floors, having advantages as for rapidity and economy in the production.
  • According to the present invention, the process for realizing the above described boards for floors and, especially, relatively short and wide boards, comprises: making a multi-layer panel to form a structure of plywood type; matching said panel with a plurality of elements made of a material - mostly valuable - intended to form the upper layers of the boards, said elements being spaced between them and with the fibres patterns orthogonal to those of the outer layers of the plywood panel; making grooves - mostly by a milling operation - in the lower layer, parallel to the fibres patterns of the outer plywood layers and, therefore, perpendicular to the fibres pattern of said elements; and the separating operation to create the boards and the operation to form the joint cogs and slots.
  • The invention will b-e better understood by following the description and the attached drawing which shows a practical non-limitative exemplification of the same invention. In the drawing:
    • Fig.1 shows a perspective view of a board according to a first modified embodiment, with cutaway parts and without joints; and
    • Fig.2 shows a much enlarged and fragmentary cross section of a board according to a second embodiment, with five-layer plywood.
  • According to the drawing, a floor board is made up of an upper layer 21 of valuable wood and a lower layer 23 consisting of two external plywood sheets 23A, 23B, and two intermediate sheets 23C. The fibres pattern of the layer 21 and of sheets 23C is longitudinal, that is, lying in the direction fL of the board length; the fibres pattern of sheets 23A and 23B is orientated in the transverse direction fT. In the drawing, the cross sections taken on planes perpendicular to the fibres are conventionally squared and the cross-sections parallel to the fibres pattern show a wide, wavy hatching. In the plywood layer 23 (23A, 23B, 23C, 23C), transverse grooves 25 are cut out parallel to the direction fT and suitably spaced apart for the function already pointed out. The depth of the grooves does not go beyond the glueing surface 27 between 21 and 23B, and may also not go beyond the glueing surface 29 between 23B and 23C.
  • The boards have rib projections 30 and channel recesses 32 - shown only in Fig.2 - to form the joints. Both the projections and the channels are formed from the layer 23.
  • Fig.2 shows a five-layer plywood, a central layer 23E bezng interposed between the thicknesses or sheets 23C; the sheet or thickness 23E has the fibres pattern parallel to that of thicknesses 23A and 23B.
  • The preparation of the above described material is similar to that pointed out in the above mentioned prior patent.
  • - It is understood that the drawing shows an exemplification-given only as a practical demonstration of the invention, as this may vary in the forms and dispositions without nevertheless coming out from the scope of the idea on which the same invention is based.

Claims (9)

1. A board for wooden floors, consisting of an upper layer with viewable face, mostly of valuable wood, matched with a lower layer having a plywood construction and thus with sheets having the fibres pattern both orthogonal and parallel to that of the valuable layer, the valuable layer intended to form the viewable face having a longitudinal fibres pattern and the lower plywood layer having transverse grooves being therefore orthogonal to the fibres pattern of the upper layer, characterized in that the lower layer has external sheets or thicknesses with fibres patterns perpendicular to those of the upper valuable layer and thereby parallel to the grooves.
2. Board for floors according to the preceding claim, characterized in _that the lower plywood layer has five sheets or thicknesses, the intermediate thickness and the two external ones of said lower plywood layer having fibres pattern transverse in respect to that of the upper valuable layer.
3. Board for floors according to claim 1, characterized in that the lower plywood layer has the two external sheets or thicknesses with fibres pattern being transverse to that of the upper valuable layer, and the intermediate sheet or thickness - single or double - with a fibres pattern being parailel to that of the upper valuable layer.
4. Board for floors according to claims 1 to 3, characterized in that the grooves have such a depth as to involve most of the thickness of the lower plywood layer.
5. Board for floors according to claims 1 to 4, characterized in that the grooves have a depth of the order of at least 3 mm and such a depth as never to penetrate the upper layer and so as not to indent the adhesive veil which unites the board to the lower plywood layer.
6. Board according to claims 1 to 5, characterized in that the side clogs and slots for the installation joint are formed in the lower layer.
7. Board for wooden floors, as described and illustrated and for the specified purposes.
8. A process for producing wood boards for floors according to claims 1 to 7, especially relatively short and wide boards, characterized in that it comprises: making a multi-layer panel to form a structure of plywood type; matching said panel with a plurality of elements made of a material - mostly valuable - intended to form the upper layers of the boards, said elements being disposed spaced apart from each other and with the fibres patterns orthogonal to those of the external layers of the plywood panel; making grooves - mostly by a milling operation - in the lower layer, parallel to the fibres pattern of the external layer of the plywood panel and hence perpendicular to the fibres patterns of said elements; and the separating operation to create the boards and the operation to form the joint cogs and slots.
9. Process as described and illustrated, and for the specified purposes.
EP86830050A 1985-03-05 1986-03-04 A process for forming floor boards on a plywood base and a board thus realized Expired - Lifetime EP0194238B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86830050T ATE64169T1 (en) 1985-03-05 1986-03-04 METHOD OF MANUFACTURE OF PLYWOOD BASED FLOORBOARDS AND BOARD THUS MANUFACTURED.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT09353/85A IT1201246B (en) 1985-03-05 1985-03-05 PROCEDURE FOR THE FORMATION OF FLOOR LISTS ON A PLYWOOD BASIS, AND LIST SO MADE
IT935385 1985-03-05

Publications (3)

Publication Number Publication Date
EP0194238A2 true EP0194238A2 (en) 1986-09-10
EP0194238A3 EP0194238A3 (en) 1987-09-16
EP0194238B1 EP0194238B1 (en) 1991-06-05

Family

ID=11128873

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86830050A Expired - Lifetime EP0194238B1 (en) 1985-03-05 1986-03-04 A process for forming floor boards on a plywood base and a board thus realized

Country Status (4)

Country Link
EP (1) EP0194238B1 (en)
AT (1) ATE64169T1 (en)
DE (1) DE3679574D1 (en)
IT (1) IT1201246B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0236283A3 (en) * 1986-03-07 1990-07-11 VIAROM s.r.l. A manufactured product for flooring, made up of wood elements having fibre pattern orthogonal to the viewable face and assembled with a plywood support
EP0849416A3 (en) * 1996-12-19 2000-04-19 Margaritelli Italia S.p.A. Flooring strip consisting of a high quality wooden strip and a special multilayer support whose orthogonal fibres prevail with respect to those of the high quality wooden strip
US6534143B1 (en) 1998-07-13 2003-03-18 Erwin Thoma Prefabricated laminated wood member
US7225591B2 (en) * 2000-10-08 2007-06-05 Hangzhou Dazhuang Floor Co., Ltd. Flexible two-ply flooring system
EP1944158A3 (en) * 2003-12-04 2008-10-15 AWI Licensing Company Plywood laminate having improved dimensional stability and resistance to warping and delamination
WO2012149634A1 (en) * 2011-05-02 2012-11-08 D Abbadie D Arrast Michel-Arnaud Cross-laminated timber panel
CN103978535A (en) * 2014-05-16 2014-08-13 徐斌 Technology for processing floor with special patterns

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4131640A1 (en) * 1991-09-23 1993-04-01 Hamberger Industriewerke Gmbh Laminated floor panels which resist dampness distortion - comprises minimum of three layers of laminates, middle one being plywood with low swelling property when damp and one that resumes original shape when dry

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR659803A (en) * 1928-08-31 1929-07-03 Improvements to wooden panels for walls and floors
FR706274A (en) * 1930-02-19 1931-06-20 New elements of plywood parquet floors and device facilitating manufacture
CH154091A (en) * 1931-04-20 1932-04-30 Maury Alois Element of parquet.
FR890194A (en) * 1943-01-18 1944-01-31 construction element for parquet floors
GB628559A (en) * 1946-07-01 1949-08-31 Gustaf Kahr Improved laminated floor boards and method of manufacturing same
DE841633C (en) * 1949-11-17 1952-06-16 Kulmbacher Spinnerei Process for the production of a floor covering
CH328341A (en) * 1954-07-05 1958-03-15 Kristian Staerk A S Profiled plywood sheet
FR1480365A (en) * 1966-03-31 1967-05-12 Duchesne Ets Parquet
AT379845B (en) * 1980-08-27 1986-03-10 Tarkett Ab PLATE OR ROD, IN PARTICULAR FOR FLOORS

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0236283A3 (en) * 1986-03-07 1990-07-11 VIAROM s.r.l. A manufactured product for flooring, made up of wood elements having fibre pattern orthogonal to the viewable face and assembled with a plywood support
EP0849416A3 (en) * 1996-12-19 2000-04-19 Margaritelli Italia S.p.A. Flooring strip consisting of a high quality wooden strip and a special multilayer support whose orthogonal fibres prevail with respect to those of the high quality wooden strip
US6534143B1 (en) 1998-07-13 2003-03-18 Erwin Thoma Prefabricated laminated wood member
US7225591B2 (en) * 2000-10-08 2007-06-05 Hangzhou Dazhuang Floor Co., Ltd. Flexible two-ply flooring system
EP1944158A3 (en) * 2003-12-04 2008-10-15 AWI Licensing Company Plywood laminate having improved dimensional stability and resistance to warping and delamination
WO2012149634A1 (en) * 2011-05-02 2012-11-08 D Abbadie D Arrast Michel-Arnaud Cross-laminated timber panel
CN103978535A (en) * 2014-05-16 2014-08-13 徐斌 Technology for processing floor with special patterns
CN103978535B (en) * 2014-05-16 2016-01-20 徐斌 Processing has the technique of annual ring graphic pattern floor

Also Published As

Publication number Publication date
IT1201246B (en) 1989-01-27
DE3679574D1 (en) 1991-07-11
IT8509353A0 (en) 1985-03-05
ATE64169T1 (en) 1991-06-15
EP0194238B1 (en) 1991-06-05
EP0194238A3 (en) 1987-09-16

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