US20060198989A1 - Hydraulic binder-based, tapered-edge boards, production method and production line therefor, and light work construction method - Google Patents

Hydraulic binder-based, tapered-edge boards, production method and production line therefor, and light work construction method Download PDF

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Publication number
US20060198989A1
US20060198989A1 US11/358,028 US35802806A US2006198989A1 US 20060198989 A1 US20060198989 A1 US 20060198989A1 US 35802806 A US35802806 A US 35802806A US 2006198989 A1 US2006198989 A1 US 2006198989A1
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US
United States
Prior art keywords
feathered edges
parallel
board
preform
boards
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.)
Abandoned
Application number
US11/358,028
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English (en)
Inventor
Paul Jallon
Jean-Louis Laurent
Frederic Peronnet
Roger Arese
Lionel Zbinden
Emmanuel Vial
Loic Martin
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.)
Lafarge SA
Original Assignee
Lafarge Platres SA
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
Priority claimed from EP03292089A external-priority patent/EP1510315A1/fr
Application filed by Lafarge Platres SA filed Critical Lafarge Platres SA
Assigned to LAFARGE PLATRES reassignment LAFARGE PLATRES ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: VIAL, EMMANUEL, JALLON, PAUL, LAURENT, JEAN-LOUIS, ARESE, ROGER, ZBINDEN, LIONEL, PERONNET, FREDERIC, MARTIN, LOIC
Publication of US20060198989A1 publication Critical patent/US20060198989A1/en
Priority to US12/538,996 priority Critical patent/US8257525B2/en
Priority to US12/539,005 priority patent/US8372240B2/en
Assigned to LAFARGE SA reassignment LAFARGE SA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LAFARGE PLATRES
Abandoned legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/08—Apparatus or processes for treating or working the shaped or preshaped articles for reshaping the surface, e.g. smoothing, roughening, corrugating, making screw-threads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/08—Apparatus or processes for treating or working the shaped or preshaped articles for reshaping the surface, e.g. smoothing, roughening, corrugating, making screw-threads
    • B28B11/0863—Apparatus or processes for treating or working the shaped or preshaped articles for reshaping the surface, e.g. smoothing, roughening, corrugating, making screw-threads for profiling, e.g. making grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/14—Apparatus or processes for treating or working the shaped or preshaped articles for dividing shaped articles by cutting
    • B28B11/16—Apparatus or processes for treating or working the shaped or preshaped articles for dividing shaped articles by cutting for extrusion or for materials supplied in long webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/14—Apparatus or processes for treating or working the shaped or preshaped articles for dividing shaped articles by cutting
    • B28B11/16—Apparatus or processes for treating or working the shaped or preshaped articles for dividing shaped articles by cutting for extrusion or for materials supplied in long webs
    • B28B11/166—Apparatus or processes for treating or working the shaped or preshaped articles for dividing shaped articles by cutting for extrusion or for materials supplied in long webs with devices for determining the correct cutting moment, e.g. measuring rollers or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
    • B28B19/0092—Machines or methods for applying the material to surfaces to form a permanent layer thereon to webs, sheets or the like, e.g. of paper, cardboard
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
    • E04C2/043—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres of plaster
    • 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
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1039—Surface deformation only of sandwich or lamina [e.g., embossed panels]
    • Y10T156/1041—Subsequent to lamination
    • 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
    • Y10T156/12—Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24488—Differential nonuniformity at margin
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24777—Edge feature

Definitions

  • the invention relates to a process for manufacturing hydraulic-binder-based boards and to a line for producing hydraulic-binder-based boards using this apparatus.
  • the invention also relates to a novel plasterboard having a particular geometry.
  • U.S. Pat. No. 4,781,558 describes an apparatus intended for manufacturing plasterboards with recesses. It therefore proposes the forming, on a preform intended to be cut in order to give plasterboards, of recesses by means of a drum 34 having bosses 36 (see especially FIG. 1 of that patent). The depth of the recesses is therefore determined by the size of the bosses. Thus, to change the depth and/or the shape of these recesses, it would be necessary to replace the drum 34 with another drum having bosses of different size and/or shape.
  • That document is particularly intended for the production of a particular surface finish of the plasterboards; it does not mention the particular application of producing an impression in the form of a feathering, transversely with respect to the axis of the board, on the back of the latter (namely in this case the upper side).
  • impressions 51 A, 51 B are made in a preform that is intended to be cut to give plasterboards, by means (see especially FIG. 1 and column 3 , lines 29 to 43 of that patent) of a band 20 rotating about two rollers 21 and having a protuberance 25 .
  • the preform is then cut in the middle of the impressions so as to produce boards with feathered ends or transverse feathered edges.
  • impressions are made in a preform that is intended to be cut in order to give plasterboards, by means (see especially FIGS. 1 and 7 ) of a band 20 having a plurality of protuberances 23 , 38 .
  • impressions are made on both sides of the board at the same time.
  • the object of the invention is to solve the problem of making impressions in a preform, while still offering the possibility for the size and/or shape of these impressions to be easily and quickly changed.
  • the object of the invention is also to solve the problem of making impressions in a preform using a process generally of the type of that described in U.S. Pat. No. 2,991,824, allowing the production of feathered ends or transverse feathered edges in a satisfactory manner.
  • the invention therefore provides a novel board made of a hydraulic binder with a facing on each of its sides, having, on one side, two first parallel feathered edges ( 10 ) and, on the other side, two other parallel transverse feathered ends or feathered edges ( 25 a ) that are perpendicular to the first ones.
  • the invention also provides a novel board made of a hydraulic binder with a facing on each of its sides, having, on one side, two first parallel feathered edges ( 10 ) and, either on the same side or on the other side, two second parallel feathered edges ( 25 a ) that are perpendicular to the first ones, the said other parallel feathered edges ( 25 a ) having a width of between 100 and 200 mm.
  • the invention also provides a novel board made of a hydraulic binder with a facing on each of its sides, having, on one side, two first parallel feathered edges ( 10 ) and, either on the same side or on the other side, two second parallel feathered edges ( 25 a ) that are perpendicular to the first ones, the said second parallel feathered edges ( 25 a ) having a width such that the ratio of the width of the said second parallel feathered edges ( 25 a ) to the width of the said first parallel feathered edges ( 10 ) is between 1.5 and 5.
  • the invention also provides a method of constructing an interior structure using this board, and also a process and a device for manufacturing this board.
  • the invention also provides a process and devices for manufacturing boards made of a hydraulic binder having four feathered edges on the same side.
  • the invention uses in particular a device for producing an impression or pocket in a preform based on a hydraulic binder.
  • This apparatus therefore comprises at least:
  • the subject of the invention is also a process for manufacturing a hydraulic-binder-based board from a preform intended to be cut up, this process including a step during which an impression is made in the preform by means of an apparatus according to the invention.
  • This process has the advantage in particular of making it possible to obtain boards with feathered edges in which board the transverse feathered edges may be on the same side as the conventional feathered edges or on the opposite side.
  • the subject of the invention is also a line for producing hydraulic-binder-based boards from a preform comprising a facing material covered with a hydraulic binder composition and supported by a conveyor belt (or forming belt).
  • This production line also has the advantage of allowing boards with feathered edges to be produced.
  • FIG. 1 shows schematically and in perspective the apparatus according to the invention
  • FIG. 2 shows schematically and in cross section the assembly of a wire onto a chain link
  • FIG. 3 shows schematically a wire gripper pin
  • FIG. 4 shows schematically and in a view from above a support piece mounted on a chain link
  • FIG. 5 shows schematically the support piece of FIG. 4 , viewed from the front;
  • FIG. 6 shows schematically one step of a process for manufacturing hydraulic-binder-based boards
  • FIG. 7 shows schematically another step of a process for manufacturing hydraulic-binder-based boards
  • FIG. 8 shows a board that can be obtained using the process according to the invention
  • FIG. 9 shows another board that can be obtained using the process according to the invention.
  • FIG. 10 illustrates an optional intermediate step of a process for manufacturing hydraulic-binder-based boards
  • FIG. 11 shows schematically, and in perspective, a part of the line for producing hydraulic-binder-based boards
  • FIG. 12 shows schematically, and in a view from above, a device for introducing laths under a hydraulic-binder-based preform
  • FIG. 13 shows schematically, and in side view, the device of FIG. 12 ;
  • FIG. 14 shows schematically, and in side view, an alternative embodiment of the device of FIG. 12 ;
  • FIG. 15 shows schematically, and in cross section, a detail of the device of FIG. 12 illustrating the introduction of a lath under a hydraulic-binder-based preform
  • FIG. 16 shows schematically a part of a line for producing hydraulic-binder-based boards according to the invention
  • FIG. 17 shows schematically a secondary forming device
  • FIG. 18 shows schematically an alternative embodiment of a secondary forming device
  • FIG. 19 shows schematically a board made of a hydraulic binder according to the invention.
  • FIG. 20 shows schematically the board of FIG. 19 with a change in position of the faces
  • FIG. 21 shows schematically a board made of hydraulic binder according to the invention according to a second embodiment
  • FIG. 22 shows schematically in cross section a feathered edge of a board according to the invention
  • FIGS. 23A and 23B show a diagram of the “reversal” of the feathered edges of a board according to a first embodiment
  • FIGS. 24A, 24B and 24 C show a diagram of how boards with four feathered edges according to the prior art are fitted together.
  • FIGS. 25A, 25B and 25 C show a diagram of how boards with four feathered edges according to the invention are fitted together.
  • FIG. 1 The apparatus according to the invention is shown schematically in FIG. 1 .
  • It comprises a frame 101 in the shape of an H but which can easily be given numerous other shapes by the person skilled in the art.
  • Supported on this frame 101 are, at a first end 104 , two first pulleys 102 and 103 and, at a second end 107 , two second pulleys 105 and 106 .
  • the first pulleys 102 , 103 lie in a first plane, the second pulleys 105 , 106 in a second plane and the first plane is parallel to the second plane.
  • the pulley 102 and the pulley 105 are situated one facing the other and are of identical size.
  • the pulley 103 and the pulley 106 are also situated one facing the other and are of identical size.
  • the pulleys 102 , 103 , 105 and 106 can rotate about themselves.
  • a first transmission belt 108 is wrapped around the first pulleys 102 , 103 and a second transmission belt 109 is wrapped around the second pulleys 105 , 106 .
  • the transmission belts 108 and 109 are identical. They are connected together by at least one wire 111 .
  • This wire 111 is fixed removably to the first and second belts 108 , 109 so that its longitudinal axis is parallel to the axis of rotation of the pulleys.
  • one of the pulleys for example the pulley 102
  • the transmission belt 108 which itself drives the other pulley lying in the same plane as it (the pulley 103 ) and the means of elongate shape 110 .
  • the latter therefore moves along the path defined, on the one hand, by the loop consisting of the belt 108 and, on the other hand, as it is connected to the second belt 109 , also by the loop consisting of the latter.
  • the symmetry of the apparatus according to the invention therefore allows the axis of the wire 111 to move in an elliptical path, its axis remaining constantly parallel to that of the pulleys.
  • the apparatus may also comprise means for driving the rotation of at least one of the pulleys. These means may possibly drive two pulleys by means of the shaft on which they are mounted.
  • the wire 111 generally has a cylindrical shape, but it may adopt a great many shapes among which mention may be made of those that are parallelepipedal, prismatic, board-shaped, etc.
  • It may be fixed for example by screwing to the transmission belts so as to be able to be unscrewed and replaced easily by another means of elongate shape.
  • wires 111 are arranged parallel to one another along the transmission belts 108 and 109 (see FIG. 1 ) and are fixed in a removable manner. They are preferably spaced apart.
  • the pulleys are preferably sprockets and the transmission belts chains able to cooperate with these sprockets.
  • the wires may then be fixed in the way illustrated in FIG. 2 .
  • FIG. 2 shows a wire 111 held on a chain link 112 by means of a support piece 113 and a wire gripper pin 114 .
  • the wire gripper pin 114 is shown in detail in FIG. 3 . It comprises, in order:
  • the support piece 113 is visible in FIGS. 2, 4 and 5 .
  • It comprises the hole 118 able to cooperate with the corresponding part 117 of the wire gripper pin 114 and a bore 121 opening into the hole 118 .
  • This bore 121 is threaded so that a pressure screw 122 can be screwed into it in order to compress the wire 111 present inside the hole 118 with a view to holding it firmly (see FIG. 2 ).
  • the set-up of FIG. 2 is achieved. To do that, all that is required is for the part 117 of the wire gripper pin 114 to be introduced into the support piece 113 , for the normal roller bearing pin of the link 112 to be removed, for the part 116 of the wire gripper pin 114 to be introduced along the axis of the roller, and for the assembly to be tightened by screwing a nut 123 onto the end 115 of the wire gripper pin 114 , for the wire 111 to be introduced into the central bore 120 of the wire gripper pin 114 and for it to be held there firmly by screwing the pressure screw 122 into the threaded bore 121 until it effectively compresses the wire 111 .
  • wire gripper pin 114 is mounted in such a way that its head 119 is on the inside of the chain, that is to say on the side facing towards the other chain.
  • the support piece 113 preferably comprises two pairs (hole 118 , threaded bore 121 ), the spacing between the axes of the holes 118 corresponding to the normal spacing between the axes of the rollers of a chain link 112 , so that two wires 111 can be held on the same link 112 , as can be deduced from FIGS. 4 and 5 .
  • the apparatus according to the invention may be used, in a process for manufacturing hydraulic-binder-based boards, to make an impression in the preform intended to be cut in order to give the hydraulic-binder-based boards.
  • the preform is then preferably cut at the impression or opposite the place where this impression has been made (i.e. on the other side of the preform).
  • the apparatus according to the invention can be used in a process for manufacturing plasterboards with feathered edges.
  • FIGS. 6 to 10 Such a process is illustrated by FIGS. 6 to 10 . It comprises the following steps:
  • transverse edges in this description are intended to mean the edges perpendicular to the direction of travel of the conveyor belt in a production line for producing hydraulic-binder-based boards. Such transverse edges are also known as “board ends”.
  • FIG. 6 shows a line for the production of boards produced by pouring a hydraulic binder composition 2 onto a facing material 1 , which boards are generally covered with a second facing material 3 .
  • the passage of the assembly beneath the forming plate 4 gives a preform 5 .
  • the hydraulic binder composition preferably comprises gypsum plaster.
  • the facing materials 1 and 3 may consist of sheets of paper or card, or may consist of mats of glass or of any material known to those skilled in the art as being able to be used as facing material.
  • a lath 6 is introduced between the preform 5 and the start of the conveyor belt 7 .
  • the distance between the forming plate 4 and the start of the conveyor belt 7 is such that the preform 5 has not yet had time to harden appreciably and is still very plastic. Introduction is performed in such a way that the longitudinal axis of the lath 6 is substantially perpendicular to the direction of travel of the conveyor belt 7 .
  • the lath 6 is then driven by the conveyor belt 7 , like the preform 5 .
  • the gypsum plaster composition 2 then sets hydraulically and hardens throughout the travel of the preform 5 , denoted by the arrows A.
  • the lath 6 is removed before the preform 5 is cut.
  • the hardness of the preform 5 is sufficient that the lath 6 can be removed without deforming the preform 5 and without the gypsum plaster composition 2 filling the space or feathering 8 ( FIG. 7 ) left by the removal of the lath 6 .
  • the lath 6 can be removed in any appropriate way. For example, when the length of the lath 6 exceeds the width of the preform 5 , the lath 6 projects from the preform 5 , and it can then be removed quickly in a direction substantially perpendicular to the direction of travel of the conveyor belt 7 , and away from the latter. This removal action is illustrated by the arrow B in FIG. 6 .
  • the lath 6 may also be removed by causing this lath 6 to drop into the space between two constitutive rollers of the conveyor belt system which, in general, is not continuous along the entire length of the production line but is made up of several belts driven by rollers between which there are gaps.
  • the preform 5 continues to travel, still driven by the conveyor belt 7 , and the gypsum plaster composition 2 continues to harden.
  • the cutting device is set so that the knife 9 cuts the preform 5 approximately in the middle of the feathering 8 .
  • each feathering 8 depends on the size of the lath 6 .
  • the latter is generally a parallelepiped generally of between 0.5 and 4 mm and preferably between 1.5 and 4 mm thick. Its width is generally between 5 and 20 cm and its length is at least approximately equal to the width of the preform 5 (possibly reduced by the width of the longitudinal bands (tapes) that might be present), but generally greater so that it can be grasped for removal from under the preform 5 . Furthermore, it is desirable for the lath 6 to be longer than the width of the preform 5 , so that it projects with respect to the latter, which may make it easier to remove.
  • the material of which the laths 6 are made is of little importance, provided that it allows these laths to withstand the weight of the thickness of the preform 5 lying on top of each lath 6 . It may therefore be made of a plastic, wood, metal, etc., with good resistance to wear and good stability over time.
  • the method which has just been described supplements a known method for manufacturing plasterboards having two feathered longitudinal edges.
  • the latter method generally anticipates the placement of a band, generally made of plastic, and generally known as a tape, along each longitudinal side of the conveyor belt 7 .
  • a band generally made of plastic, and generally known as a tape
  • the length of the plasterboards manufactured depends of course on the rate of travel of the conveyor belt and on the frequency of the cutting operations.
  • the frequency of the cutting operations is generally directly connected to the frequency at which the laths are introduced, because in general the desire is to obtain boards with two feathered transverse edges.
  • This process is very flexible because, in order to change the length of the boards manufactured, it is sufficient simply to alter the frequency at which the laths are introduced.
  • the process that has just been described uses the apparatus according to the invention to make an impression in the preform intended to be cut to give the hydraulic-binder-based boards.
  • an impression 12 is made by means of an apparatus according to the invention in the preform 5 opposite the place where it is intended to insert the lath 6 , or an impression 12 a at the place where it is intended to introduce this lath 6 .
  • a smoother 4 a of conventional type (which can be seen in FIG. 6 ) may also be provided downstream of the place where the lath 6 is introduced.
  • the impression is not used with regard to the introduction of a lath.
  • the device for making the impression is used alone in the manufacturing line.
  • the impression made in the preform will result, after the hydraulic binder has set, to a shape having conventional longitudinal feathered edges, and a depression corresponding to the impression.
  • this depression is located on the opposite face to that bearing the conventional longitudinal feathered edges, or on the same face.
  • this will preferably be the impression 12 , and therefore on the opposite face to that bearing the conventional longitudinal feathered edges.
  • the apparatus according to the invention may be used in a line for producing hydraulic-binder-based boards from a preform 5 comprising a facing material 1 covered with a hydraulic binder composition 2 and supported by a conveyor belt 7 .
  • the distance between the conveyor belts of this apparatus is at least equal to the width of the preform 5 .
  • these belts and the pulleys are located on each longitudinal side of the preform.
  • the apparatus according to the invention is placed in an appropriate manner so that, when its transmission belts turn, its elongate means creates an impression in the preform 5 .
  • the apparatus according to the invention may also be above the preform 5 , and in this case it creates the impression 12 , or beneath the preform 5 , in which case it creates the impression 12 a.
  • the apparatus according to the invention preform 5 .
  • the cutting device may be set to cut the preform at an impression 12 .
  • the cutting device may be set to cut the preform opposite the place where this impression 12 a has been made.
  • the line for producing hydraulic-binder-based boards is a line for producing boards with feathered edges.
  • a line will now be described in detail with reference to FIGS. 6 to 15 . The way in which the apparatus according to the invention is used in this line will then be described afterwards.
  • FIG. 11 shows part of a line for producing hydraulic-binder-based boards.
  • laths magazine 20 formed from a horizontal rectangular surface 21 from the corners of which there rise, vertically and in parallel, four bracket-shaped angular pieces 22 facing towards each other, so as to flank a stack of laths 23 .
  • this lath magazine 20 is such that it can store a great many laths 23 (see also FIGS. 12 and 13 ).
  • the horizontal surface 21 of the lath magazine 20 is supported on legs 24 .
  • first lath 23 that is to say the one at the very bottom of the stack
  • two rams 26 which are oriented in such a way as to extract the first lath 23 from the stack by pushing it and causing it to slide towards an inclined plane 27 consisting of a downwardly inclined surface 28 and of a rim 29 at its lower part to retain the lath which has just been extracted and guide it later.
  • a ram 31 is arranged parallel to the longitudinal axis of the inclined plane 27 so that actuation of this ram 31 can give an impulse to the lath which has just been extracted from the lath magazine 20 .
  • the lath thus propelled can therefore move, sliding parallel to the longitudinal axis of the inclined plane 27 , the rim 29 of which guides it, towards a second inclined plane 32 in the continuation of the first inclined plane 27 , on the opposite transverse side to the side 30 .
  • This second inclined plane 32 also consists of an inclined surface 33 equipped with a rim 34 at its bottom. It further comprises a stop 35 on its opposite end to the ram 31 , this stop generally consisting of a pneumatic damper and being intended to end the movement of the lath propelled by the ram 31 .
  • the rim 34 is equipped with openings 36 facing which there are two rams 37 oriented in such a way as to propel the lath positioned on the second inclined plane 32 towards the top of the inclined surface 33 .
  • the first inclined plane 27 and the second inclined plane 32 are supported on legs 38 and 39 respectively.
  • a flat surface 40 is provided parallel to the surface 23 , between this surface and the first inclined plane 27 , to horizontally support a lath extracted from the lath magazine 20 before it descends along the inclined surface 28 of the first inclined plane 27 .
  • the height of the legs 24 , 35 and 36 is chosen so that a lath positioned on the second inclined plane 32 lies at a lower height than the preform 5 .
  • the length of the second inclined plane 32 is at least equal to that of the lath 23 , that is to say at least equal to, and preferably greater than, the width of the preform 5 .
  • the difference between the length of the lath and the width of the preform 5 allows the lath to be grasped and removed once the gypsum plaster composition has hardened.
  • the production line according to the invention generally comprises electronic means which control its operation and, as necessary, allow the performance of various operations to be slaved to one another.
  • These electronic means may make provision that, after a lath has been introduced under the preform by actuation of the rams 27 , the ram 31 is actuated to introduce another lath onto the second inclined plane 32 , then the rams 26 are actuated to introduce another lath onto the first inclined plane 27 , and so on.
  • the electronic means may vary the frequency of these operations in order to reduce or increase the length of the plasterboards produced with feathered edges.
  • FIG. 16 shows part of a production line according to a preferred embodiment of the invention.
  • This Figure shows that the production line includes one embodiment of the apparatus according to the invention.
  • This apparatus which can be seen in profile in FIG. 16 , comprises four first sprockets 201 , 202 , 203 , 204 supported by a frame 205 and with, wrapped around them, a chain 206 made up of links of which some, the links 207 , each support two wires, in the way indicated in conjunction with FIG. 2 .
  • This apparatus is symmetrical with respect to a vertical plane aligned with the direction of travel of the preform 5 .
  • the wires held by the links 207 extend transversely with respect to the preform 5 as far as a second chain, identical to the chain 206 , and wrapped around second sprockets identical to the first sprockets 201 , 202 , 203 , 204 .
  • the apparatus is equipped with an electric motor 209 driving the rotation, via a belt 211 , of the shaft 210 on which the sprocket 203 and its symmetrical sprocket are mounted.
  • the turning of these sprockets drives the rotation of the chain 206 in the direction indicated by the arrow D.
  • This preform 5 is obtained in a known way by introducing hydraulic binder slurry in the direction of the arrow E between the first facing material 2 and the second facing material 3 and passing the entity between the upper 214 and lower 215 forming plates of the apparatus.
  • the distance between the sprockets 201 , 202 , 203 , 204 and their symmetrical sprockets is at least equal to that of the preform 5 so that these sprockets do not touch this preform 5 .
  • the apparatus according to the invention is fixed at an appropriate height so that when the production line is operating, the movement of the chain 206 driving the movement of the wires connected to the links 207 , these wires pass through the forming plate, that is to say between the plates 214 and 215 , and project downwards with respect to the upper plate 214 .
  • the space occupied by these wires between the upper plate 214 and the second facing material 3 therefore results at this point in a feathering of the thickness of the preform 5 .
  • the frame 205 of the apparatus according to the invention may, as is clear from FIG. 16 , be fastened to the plates 214 and 215 . It follows that the apparatus according to the invention may be used instead of a forming plate or a master roll, as used conventionally.
  • This embodiment corresponds to the case in which the lath is introduced no longer before the first forming tape, but between the first and second forming tapes (or possibly between the second and third forming tapes, as the case may be).
  • the conveyor belt 7 is generally divided into several elements called forming tapes.
  • the forming tape 1 is that at the front.
  • a conventional conveyor belt comprises in general two or three, or even four, forming tapes. These forming tapes, as indicated above, comprise tapes so as to form the longitudinal feathered edges.
  • the other elements remain the same (impressions 12 or 12 a , depending on the case), except that the lath is introduced at a place on the line at the point where the hydration of the hydraulic binder has commenced (see below in the section regarding the third embodiment).
  • the other constituent elements are shifted correspondingly, (for example the smoother 4 a is shifted to or after the first roller for driving the second forming tape; in this case, the smoother takes the form of a roller having a peripheral speed approximately identical to that of the conveyor belt 7 ).
  • FIG. 17 This embodiment is shown in FIG. 17 .
  • the impression 12 made, in particular by the device according to the invention is “pushed-in” upwards by a device 300 located beneath the preform.
  • This system is in fact the reverse of that forming the subject-matter of U.S. Pat. No. 2,991,824.
  • the system serving to push-in the impression is located downstream of the forming device.
  • this inversion device is located between the tapes 1 and 2 (but it is also possible to place it between the tapes 2 and 3 , if appropriate).
  • This device is placed at a point on the line at which the hydration of the hydraulic binder has commenced.
  • this device is located at a point corresponding to 5% to 30% hydration and/or at a place located between 40 and 110 m along the length of the conveyor belt 7 (for example for a line with a speed of about 70 m/min).
  • This device 300 is placed between the tapes 1 and 2 , referenced 301 and 302 respectively. These tapes are driven by rollers 303 and 304 respectively.
  • the device 300 comprises, on the one hand, a secondary forming device 300 a .
  • This comprises, on a frame (not shown), a belt 305 rotating at a linear speed equal to the speed of the tapes 301 and 302 . Thus any slippage of the facing is prevented.
  • Fixed to this belt 305 are one or more forming laths 306 . In the description that follows, reference will be made to only a single lath, but, depending on the dimensions of the devices, the desired boards, etc., it is possible to use several laths.
  • This belt is mounted on rollers 307 and 308 , at least one of which is preferably driven.
  • a flat sliding plate 309 for example made of marble, is placed between the preform and the belt 305 so that these are in contact over a flat surface. Facing this part is a “backing device” 300 c.
  • This comprises, on a frame (not shown), a belt 310 rotating at a linear speed equal to the speed of the tapes 301 and 302 , this belt 310 being mounted on rollers 311 and 312 , at least one of which is preferably driven.
  • a flat sliding plate 313 for example made of marble, is placed so as to be facing between the preform and the belt 310 , in a similar arrangement to that of the plate 309 and the belt 305 .
  • the forming lath 306 comes opposite the upper impression 12 in the preform. Having done this, when the lath 306 passes at the same time as the preform between the two plates 309 and 313 , the impression is “chased” on the other side of the preform. What is therefore obtained is a preform arriving on the forming tape 302 that has a recess corresponding to a transverse feathered edge (on the same side of the board as the longitudinal feathered edges).
  • the preform passes between the two belts 305 and 310 , which are preferably driven at the run speed of the preform.
  • the preform is therefore in contact only with moving elements, so that the preform/belt relative movement is zero. There is therefore no friction.
  • the dimensions of the device are of the order of a few metres (typically there is contact over 5 to 10 m), generally sufficient to ensure that the secondary forming operation is carried out.
  • Means (not shown) for adjusting the pressure exerted by this “backing device” may be provided. These may in particular be rams or counterweights that can exert an adjustable pressure on the assembly.
  • Synchronization means are preferably provided so that the secondary forming lath 306 is substantially opposite the impression 12 . It is possible to use a cutting system composed of a wheel placed over the top of the preform and rotated by the movement of the latter. The wheel is graduated and coupled to a counter, which actuates the desired devices. It is also possible to use a system comprising a step of marking the facing of the preform (for example a point), and the detection of this mark and the consequential actuation of the devices.
  • the device 300 furthermore includes a calibrating device 300 c.
  • the lath 306 is retracted when the belt 305 turns around the roller 308 ; the preform then enters the calibrating device 300 c.
  • This comprises, on a frame (not shown), a belt 314 rotating with a linear speed equal to the speed of the tapes 301 and 302 , this belt 314 being mounted on rollers 315 and 316 , at least one of which is preferably driven.
  • a flat sliding plate 317 for example made of marble, is placed between the preform and the belt 314 in a similar arrangement to that of the plate 309 and the belt 305 .
  • a smoother of the same type as that described in the case of the second embodiment may optionally be provided.
  • This embodiment corresponds to the case in which the device of FIG. 17 or FIG. 18 is reversed, that is to say the forming lath 306 is placed not for embossing the impression and forming the transverse feathered edges on the same side as the longitudinal feathered edges, but on the contrary to “consolidate” the impression and the shaped recess.
  • the forming lath by applying the forming lath at a stage when the hydraulic binder has commenced its hydration it is possible to have, as above, ideal preform consistency at the moment of the secondary forming operation.
  • what is obtained is a board with four feathered edges, the longitudinal and transverse edges being on both sides of the board.
  • the length of the lath 306 is approximately equal to the width of the preform.
  • the lath used in the invention, and especially the lath 306 may be a parallelepipedal section, but also a section in the form of a triangle, in general an isosceles triangle, the base of which is parallel to the belt 7 .
  • the third and sixth embodiments have in common the fact that the impression 12 , alternatively 12 a , is “pushed-in” by a device beneath the preform, or alternatively above the preform.
  • the impression is “pushed-in” in its entirety, that is to say the facing paper is substantially flat once the impression has been “pushed-in”.
  • the depth of the depression on the “pushed-in” side may be 4 mm, while the depression on the original side may be 1.5 mm.
  • the subject of the invention is a method of constructing an interior structure using boards with four feathered edges, two feathered edges of which are on one side, while the other two are on the other side of the board.
  • Such boards may be obtained by the first embodiment (with the impression 12 ), the fourth embodiment and the fifth embodiment, and also the modified third and sixth embodiments.
  • Such a board is shown schematically in FIG. 19 . It may be seen in this figure that the featherings are arranged opposingly on each side of the board (the edge featherings are on the side with the cream facing ( 10 ), whereas the end featherings are on the other side, on the “grey” side ( 25 a )).
  • the dimensions of the featherings 25 a are in general of the same order of magnitude as those of the featherings 25 (these corresponding to the dimensions of the lath in the case of the fourth or fifth embodiment or of the elongate means 110 comprising the wires 111 in the case of the first embodiment for example).
  • the feathering 25 a may therefore have a depth of between 0.5 and 4 mm, preferably between 1.5 and 4 mm.
  • the width of the feathering may be between 2 and 15 cm, preferably between 5 and 10 cm.
  • the longitudinal featherings have the standard dimensions in the art, such as those conventionally given by the tapes.
  • the method of constructing an interior structure comprises the following steps (and which will be described in greater detail below):
  • step b) the transverse feathered edges, which are on that side of the board not visible to the fitter, are “turned up” owing to the effect of the fastening by screws, nails or the like, as this region of the board is clamped onto the support. Having done this, they then reveal a feathering on the same side of the board as the longitudinal feathered edges (or edge featherings). Thus, feathered edges are therefore obtained at each joint between the boards.
  • the transverse feathered edges ( 25 a ), namely those that are on the grey facing side, are identified by the specific marking on the cream facing side in such a way that the user (the plasterer who is fitting the partition) knows that there are feathered edges on the grey facing side. When pairing boards, the user will therefore know that there are such featherings and therefore he will be able to treat the joints accordingly.
  • the marking of these featherings may take any appropriate form, such as a repeated pattern.
  • this marking offers an advantage when two boards according to the invention are butted together along the transverse featherings; this is because, when the transverse feathered edge is butted, for example, against a wall, the marking on the cream facing indicating the presence of this feathering on the grey facing has no appreciable influence on the fitting operation nor on the way in which the joints are treated.
  • This marking is in particular identified in FIG. 20 by the symbols 26 a , 26 b , 26 c and 26 d near the feathered edges ( 25 a ). This marking is present on the cream side and identifies the transverse feathered edge intended to be paired with a transverse edge of the same type of a second board according to the invention.
  • This marking furthermore makes it possible to identify the width of the transverse feathering ( 25 a ) and to adapt the joint treatment accordingly, especially by using a tool or spatula of suitable size.
  • the plasterer may simply apply plaster, in particular the top coat, only at the marks and be guided by them.
  • the marking may comprise repeated marks. If the valley formed by the feathered edges ( 25 a ) is obtained by “inversion” during step b), it is preferable to use a sufficient number of screws to ensure that this inversion operation can be carried out easily. For example, it is possible to use three, preferably five, screws, as is conventionally done, but it is preferred to use from six to ten, advantageously seven, repeated marks. The number of marks will therefore correspond to the number of screws to be used.
  • the boards with the marking are manufactured as described above, except that the face paper is printed before receiving the plaster. This may be printed in situ, or else a reel of already printed paper may be used.
  • the production line then includes suitable printing means.
  • the subject of the invention is also a novel hydraulic-binder-based board with four feathered edges and a method of constructing interior structures using such boards.
  • Plasterboards are known and in general such boards comprise two longitudinal feathered edges. When the boards are butted together along the transverse edges, an additional thickness is necessarily formed along the joint.
  • a first technique consists in offsetting the rail of the framework by about 2 mm so as to create the equivalent of a feathering. However, this technique is difficult to implement owing to the discrepancies that necessarily arise.
  • the tool used to apply the tape bonding cement (when one is used) and the joint cement generally has a width of greater than 120 mm, thereby necessarily creating overthicknesses at the intersection of the joints during application of the cement to the transverse joints, thus reducing the attraction of boards with four feathered edges, which are already penalized by their higher cost.
  • U.S. Pat. No. 4,397,123 discloses a board according to two embodiments.
  • the board ends comprise a removable portion, which, after it has been removed, gives an edge in the form of a notch.
  • This notch once in place, is “inverted” in order to form a valley intended to receive the plaster.
  • This solution is technically very complicated; no industrial manufacturing process is described.
  • the board disclosed has a feathering along the grey side of the board, the width of this feathering being 12 inches, i.e. more than 30 cm. Again, there is no description of any process allowing this second embodiment to be obtained.
  • FIG. 19 shows a board according to a first embodiment.
  • the board conventionally comprises a hydraulic binder, in general gypsum plaster, between two facings.
  • the facing materials may consist of sheets of paper or card, glass mats or mats of any material known to those skilled in the art as being able to be used as facing material.
  • the board has, on one side, two first parallel feathered edges ( 10 ) and, on the other side, two other, second, parallel feathered edges ( 25 a ) that are perpendicular to the first ones.
  • the featherings are opposingly arranged on each side of the board (the edge featherings are on the cream facing side ( 10 ), while the end featherings are on the other side, i.e. the “grey” side ( 25 a ).
  • the depth of the feathering is in general between 0.5 and 4 mm, preferably between 0.5 and 3 mm, more preferably between 0.6 and 2.5 mm, or even between 0.6 and 1.8 mm and advantageously between 0.8 and 1.8 mm or 0.5 and 1.5 mm.
  • the width of the second featherings ( 25 a ) here is specific in the embodiment of the invention and is in general between 100 and 200 mm, preferably between 120 and 180 mm or between 150 and 200 mm or between 100 and 150 mm.
  • the first longitudinal featherings have a depth of approximately the same magnitude, whereas their width is appreciably smaller, for example between 40 and 80 mm.
  • the ratio of the widths of the second transverse featherings to the first longitudinal featherings is in general between 1.5 and 5, preferably between 2 and 4.
  • the ratio may also be inverted, the longitudinal edges then having a width greater than that of the transverse edges.
  • the four edges have large widths.
  • FIG. 21 shows a board according to a second embodiment, in top view.
  • the board has the four feathered edges on the same side of the board.
  • FIG. 22 shows a sectional view of a specific feathered edge according to the invention.
  • the feathering is present on both sides of the board.
  • the board furthermore includes two third feathered edges ( 25 b ) that are parallel to the second feathered edges ( 25 a ), on the other side of the board.
  • X the thickness of the board, conventionally between 6 and 25 mm
  • Y the width of the feathering, between 100 and 200 mm, preferably between 120 and 180 mm or between 150 and 200 mm, as above
  • Z′ for example the depth of the second featherings 25 a
  • Z′′ for example the depth of the third featherings 25 b
  • Z′+Z′′ is between 0.5 and 4 mm, preferably between 0.5 and 3 mm, more preferably between 0.6 and 2.5 mm, or even between 0.6 and 1.8 mm, advantageously between 0.8 and 1.8 mm or 0.5 and 1.5 mm.
  • the ratio of the values of Z′ and Z′′, or Z′/Z′′ is for example between 1 and 10, preferably between 2 and 5.
  • the boards with four feathered edges may be prepared using various processes.
  • the processes are known.
  • the board with the second (transverse) feathered edges on the side opposite that bearing the first (longitudinal) feathered edges it is possible to use:
  • the method of constructing an interior structure comprises the following steps:
  • the present method may or may not use a tape bonding cement; it is possible to use a tape, for example a paper tape, or a tape made of glass-fibre fabric, which may or may not be self-adhesive.
  • the tape bonding cement when it is used, may be identical to or different from the joint cement.
  • this joint cement may be identical to or different from the complementary finish plaster, when such a complementary finish plaster is used.
  • the transverse feathered edges which are on that side of the board not visible to the fitter, are “turned up” owing to the effect of the fixing by screws, nails or the like, since this region of the board is clamped onto the support. Having done this, they then reveal a feathering on the same side of the board as the longitudinal feathered edges (or edge featherings). Feathered edges at each junction of the boards are therefore obtained. This is illustrated in FIGS. 23A and 23B in which the support 430 receives the transverse feathered edges 25 a , which are “turned up” owing to the effect of the fixing by screws, nails or the like (these being identified in the figures by the reference 431 ).
  • step b) is the conventional step during laying.
  • the invention offers one particular advantage over the boards known from the prior art with four feathered edges. This advantage will be more apparent from the figures that follow.
  • FIGS. 24A, 24B and 24 C show a diagram of how conventional boards with four feathered edges fit together.
  • FIG. 24A shows the boards butted together.
  • FIG. 24B shows the boards with one joint (after tape has been placed in both joints) that is treated with a layer of joint cement.
  • the hatched region represents the region in which the cement has been applied. Conventionally, there is an overthickness along the sides of this application region (on the boards bordering the feathering).
  • FIG. 24C shows the boards, of which the second has a joint treated with a layer of joint cement.
  • the hatched region again represents the region in which the cement is applied. Conventionally, there is an overthickness along the sides of this application region (on the boards bordering the feathering).
  • FIGS. 25A, 25B and 25 C show diagrams of the way the boards with four feathered edges according to the invention fit together.
  • FIG. 25A shows the boards butted together with, as the case may be, the edges turned up. Once the boards according to the invention have been fitted together, they present featherings on the visible side, as was explained above.
  • FIG. 25B shows the boards with one joint (after tape has been fitted in both joints) treated with a layer of joint cement. The hatched region shows the region in which the cement is applied. Conventionally, there is also an overthickness along the sides of this application region (on the boards bordering the feathering).
  • FIG. 25C shows the boards in the which the second joint is treated with a layer of joint cement.
  • the hatched region again shows the region in which the cement is applied.
  • the tool having smaller dimensions compared with the size of the feathered edges, the cement is localized in the valley formed by the large feathered edges.
  • a joint intersection with no overthickness is obtained and therefore the surface is consequently perfectly flat.
  • the invention provides yet another advantage.
  • this rail is offset, following a deficient fitting, this offset is visible with the conventional boards.
  • the invention offers yet another advantage. If the first, second or both feathered edges are of larger size, it is possible to use larger amounts of plaster (for a greater thickness), especially joint cement. Thus, during any rubbing-down, there is less risk of the tape becoming visible (by the presence of fluff or by its visible spectrum through the plaster).
  • marking may be used.
  • the marking may also be inserted in the case of a board in which the broad feathered edge is on the same side as the other feathered edges, especially when the depth is small and it makes identification of the said feathered edge difficult.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Producing Shaped Articles From Materials (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Finishing Walls (AREA)
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US11/358,028 2003-08-25 2006-02-22 Hydraulic binder-based, tapered-edge boards, production method and production line therefor, and light work construction method Abandoned US20060198989A1 (en)

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EP03292089A EP1510315A1 (fr) 2003-08-25 2003-08-25 Plaques à base de liant hydraulique, procédé de fabrication et ligne de production de telles plaques
EP03292089.4 2003-08-25
EP04290495.3 2004-02-24
EP04290493.8 2004-02-24
EP04290493 2004-02-24
EP04290495 2004-02-24
PCT/FR2004/001265 WO2005028171A2 (fr) 2003-08-25 2004-05-21 Plaques a base de liant hydraulique a bords amincis, procede de fabrication et ligne de production de telles plaques

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US20050127545A1 (en) * 2002-02-26 2005-06-16 Lafarge Platres Production line for producing sheets based on hydraulic binder and method of manufacturing the same
US20050224154A1 (en) * 2002-04-10 2005-10-13 Lafarge Platres Method for production of plaster plates having 4 trapered edges
US20090301647A1 (en) * 2006-05-10 2009-12-10 Lafarge Platres Production process for hydraulic binder-based boards with four tapered edges, production line of such boards
CN114012884A (zh) * 2021-11-15 2022-02-08 北新集团建材股份有限公司 一种预防石膏板棱边上翘装置

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SI2707185T1 (sl) * 2011-05-13 2016-09-30 Knauf Gips Kg Obrat za proizvodnjo mavčnih plošč in metoda za proizvodnjo mavčnih plošč
WO2014090300A1 (fr) 2012-12-12 2014-06-19 Knauf Gips Kg Régulation cadencée de la quantité de pâte de plâtre
RU2676795C1 (ru) * 2018-03-23 2019-01-11 Дмитрий Евгеньевич Кармалак Светодинамическое демонстративное устройство и способ его изготовления
CN112706332B (zh) * 2020-12-02 2023-05-12 晋城天成科创股份有限公司 一种橡胶轮胎制作毛边刮除机

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US20050127545A1 (en) * 2002-02-26 2005-06-16 Lafarge Platres Production line for producing sheets based on hydraulic binder and method of manufacturing the same
US20050139052A1 (en) * 2002-02-26 2005-06-30 Lafarge Platres Method for production of sheets made from binder, production line for said sheets and device for generation of an impression
US7651327B2 (en) 2002-02-26 2010-01-26 Lafarge Platres Production line for producing sheets based on hydraulic binder and method of manufacturing the same
US7790090B2 (en) 2002-02-26 2010-09-07 Lafarge Platres Method of manufacturing sheets based on hydraulic binder, production line for producing such sheets and apparatus for making an impression
US20050224154A1 (en) * 2002-04-10 2005-10-13 Lafarge Platres Method for production of plaster plates having 4 trapered edges
US7431783B2 (en) 2002-04-10 2008-10-07 Lafarge Platres Method and apparatus for production of plaster plates having 4 tapered edges
US20090301647A1 (en) * 2006-05-10 2009-12-10 Lafarge Platres Production process for hydraulic binder-based boards with four tapered edges, production line of such boards
US8277586B2 (en) 2006-05-10 2012-10-02 Lafarge Platres Production process for hydraulic binder-based boards with four tapered edges, production line of such boards
CN114012884A (zh) * 2021-11-15 2022-02-08 北新集团建材股份有限公司 一种预防石膏板棱边上翘装置

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US20090294067A1 (en) 2009-12-03
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