Machine for the manufacture of wood fibre panels in continuous lengths

Claim 2

In a machine for continuously producing from a material, which is in comminuted form and includes a binder which will set when heated, a sheet having a pair of opposed faces providing the sheet with a cross sectional configuration having a straight line at one of said opposed faces and a predetermined profile at the other of said opposed faces, an endless belt, guide rollers supporting said belt, a first feeding device depositing on said belt a continuous layer of said material, a second feeding device depositing ridges of said material on the layer deposited by said first feeding-device, a pressure roller formed with grooves extending around the surface thereof, said belt and said layer with ridges thereon passing around said pressure roller to form said ridges into ribs, and means for applying heat to the ribbed layer to set said binder, said first device being a jet strewing a slab of said material of uniform thickness onto the bearing side of said belt ahead of said pressing roller, and said second device being a further jet strewing individual continuous ridges of said material onto said uniformly thick slab with said ridges being laterally distributed on said layer at spaced intervals corresponding to the spaces between said ribs to be subsequently formed by said pressure roller.

Claim 3

In a machine for continuously producing from a material, which is in comminuted form and includes a binder which will set when heated, a sheet having a pair of opposed faces providing the sheet with a cross sectional configuration having a straight line at one of said opposed faces and a predetermined profile at the other of said opposed faces, an endless belt, guide rollers supporting said belt, a first feeding device depositing on said belt a continuous layer of said material, a second feeding device depositing ridges of said material on the layer deposited by said first-feeding device, a pressure roller formed with grooves extending around the surface thereof, said belt and said layer with ridges thereon passing around said pressure roller to form said ridges into ribs, and means for applying heat to the ribbed layer to set said binder, said heating means being adapted to heat said ribbed layer to a lesser degree between said ribs.

Claim 4

In a machine for continuously producing from a material, which is in comminuted form and includes a binder which will set when heated, a sheet having a pair of opposed faces providing the sheet with a cross sectional configuration having a straight line at one of said opposed faces and a predetermined profile at the other of said opposed faces, an endless belt, guide rollers supporting said belt, a first feeding device depositing on said belt a continuous layer of said material, a second feeding device depositing ridges of said material on the layer deposited by said first-feeding device, a pressure roller formed with grooves extending around the surface thereof, said belt and said layer with ridges thereon passing around said pressure roller to form said ridges into ribs, and means for applying heat to the ribbed layer to set said binder, said heating means being adapted to heat said ribbed layer to a lesser degree between said ribs.

Claim 5

In a machine for continuously producing from a material, which is in comminuted form and includes a binder which will set when heated, a sheet having a pair of opposed faces providing the sheet with a cross sectional configuration having a straight line at one of said opposed faces and a predetermined profile at the other of said opposed faces, an endless belt, guide rollers supporting said belt, a first feeding device depositing on said belt a continuous layer of said material, a second feeding device depositing ridges of said material on the layer deposited by said first-feeding device, a pressure roller formed with grooves extending around the surface thereof, said belt and said layer with ridges thereon passing around said pressure roller to form said ridges into ribs, and means for applying heat to the ribbed layer to set said binder, said conveyor belt being provided in each region between adjacent ribs with an insulating strip transmitting less heat than the portions of said belt below the ribs.

Claim 6

In a machine for continuously producing from a material, which is in comminuted form and includes a binder which will set when heated, a sheet having a pair of opposed faces providing the sheet with a cross sectional configuration having a straight line at one of said opposed faces and a predetermined profile at the other of said opposed faces, an endless belt, guide rollers supporting said belt, a first feeding device depositing on said belt a continuous layer of said material, a second feeding device depositing ridges of said material on the layer deposited by said first-feeding device, a pressure roller formed with grooves extending around the surface thereof, said belt and said layer with ridges thereon passing around said pressure roller to form said ridges into ribs, and means for applying heat to the ribbed layer to set said binder, said conveyor belt being provided in each region between adjacent ribs with an insulating strip transmitting less heat than the portions of said belt below the ribs.

Claim 7

In a machine for continuously producing from a material, which is in comminuted form and includes a binder which will set when heated, a sheet having a pair of opposed faces providing the sheet with a cross sectional configuration having a straight line at one of said opposed faces and a predetermined profile at the other of said opposed faces, an endless belt, guide rollers supporting said belt, a first feeding device depositing on said belt a continuous layer of said material, a second feeding device depositing ridges of said material on the layer deposited by said first-feeding device, a pressure roller formed with grooves extending around the surface thereof, said belt and said layer with ridges thereon passing around said pressure roller to form said ridges into ribs, and means for applying heat to the ribbed layer to set said binder, including a doctor blade contacting said pressing roller in the outlet region of said pressed material sheet, said blade removing said sheet from said pressing roller and extracting said ribs from said roller grooves by engaging in said grooves, said blade having a profile shaped to the profiled surface of said pressing roller.

Claim 8

In a machine for continuously producing from a material, which is in comminuted form and includes a binder which will set when heated, a sheet having a pair of opposed faces providing the sheet with a cross sectional configuration having a straight line at one of said opposed faces and a predetermined profile at the other of said opposed faces, an endless belt, guide rollers supporting said belt, a first feeding device depositing on said belt a continuous layer of said material, a second feeding device depositing ridges of said material on the layer deposited by said first-feeding device, a pressure roller formed with grooves extending around the surface thereof, said belt and said layer with ridges thereon passing around said pressure roller to form said ridges into ribs, and means for applying heat to the ribbed layer to set said binder, including a doctor blade contacting said pressing roller in the outlet region of said pressed material sheet, said blade removing said sheet from said pressing roller and extracting said ribs from said roller grooves by engaging in said grooves, said blade having a profile shaped to the profiled surface of said pressing roller.

Claim 9

In a machine for continuously producing a sheet, from a material, which is in comminuted form and includes a binder, endless belt means, a pair of end roll means cooperating with said endless belt means for guiding an upper run thereof from one to the other of said end roll means and a lower run thereof from said other back to said one end roll means, each of said end roll means including at least one roller engaging and guiding said endless belt means and said rollers having parallel axes, respectively, a rotary forming roll situated in its entirety between said pair of end roll means at an elevation higher than said lower run of said endless belt means and at an elevation lower than the uppermost parts of said pair of end roll means where said endless belt means travels from said one end roll means and is received at said other end roll means, said forming roll having an axis parallel to the axes of said guide rollers, an additional pair of guide rollers having axes parallel to the axis of said forming roll, said additional pair of guide rollers forming a leading and a trailing guide roller, said leading guide roller leading said endless belt means downwardly toward said forming roll to travel around the latter and said trailing guide roller receiving said endless belt means from said forming roll to lead said endless belt means to said other end roll means, said leading guide roller situating part of said upper run of said endless belt means which travels from said one end roll means to said leading guide roller in a horizontal plane and said trailing guide roller situating part of said upper run of said endless belt means also in a horizontal plane traveling from said trailing guide roller to said other end roll means, and said pair of additional guide rollers being situated at an elevation higher than said forming roll and closer to each other than the diameter of said forming roll for providing for said endless belt means at its upper run an intermediate loop portion extending around said forming roll through more than 180*, and at least one feed means situated over the part of said upper run of said endless belt means traveling from said one end roll means toward said leading guide roller at the region of said one end roll means for depositing on said upper run of said endless belt means a layer of said material to be directed between the loop portion of said endless belt means and said forming roll, the latter having an outer surface formed with depressions which will determine the configuration of one face of a sheet issuing from said forming roll and traveling with said endless belt means at said upper run thereof around said trailing guide roller to said other end roll means, each of said end roll means consisting of a single guide roller having a diameter substantially larger than the diameter of said forming roll, and the parts of said upper run of said endless belt means which extend between said end guide rollers and said leading and trailing guide rollers being situateD in a common horizontal plane, a second feed means being situated over said upper run of said endless belt means at the part thereof traveling between said one end roll means and said leading guide roller, subsequent to said first-mentioned feed means, for depositing on a layer previously deposited by said first-mentioned feed means a series of continuous ridges of said material and said depressions of said forming roll being in the form of annular grooves respectively aligned with said ridges.

Claim 10

In a machine for continuously producing a sheet, from a material, which is in comminuted form and includes a binder, endless belt means, a pair of end roll means cooperating with said endless belt means for guiding an upper run thereof from one to the other of said end roll means and a lower run thereof from said other back to said one end roll means, each of said end roll means including at least one roller engaging and guiding said endless belt means and said rollers having parallel axes, respectively, a rotary forming roll situated in its entirety between said pair of end roll means at an elevation higher than said lower run of said endless belt means and at an elevation lower than the uppermost parts of said pair of end roll means where said endless belt means travels from said one end roll means and is received at said other end roll means, said forming roll having an axis parallel to the axes of said guide rollers, an additional pair of guide rollers having axes parallel to the axis of said forming roll, said additional pair of guide rollers forming a leading and a trailing guide roller, said leading guide roller leading said endless belt means downwardly toward said forming roll to travel around the latter and said trailing guide roller receiving said endless belt means from said forming roll to lead said endless belt means to said other end roll means, said leading guide roller situating part of said upper run of said endless belt means which travels from said one end roll means to said leading guide roller in a horizontal plane and said trailing guide roller situating part of said upper run of said endless belt means also in a horizontal plane traveling from said trailing guide roller to said other end roll means, and said pair of additional guide rollers being situated at an elevation higher than said forming roll and closer to each other than the diameter of said forming roll for providing for said endless belt means at its upper run an intermediate loop portion extending around said forming roll through more than 180*, and at least one feed means situated over the part of said upper run of said endless belt means traveling from said one end roll means toward said leading guide roller at the region of said one end roll means for depositing on said upper run of said endless belt means a layer of said material to be directed between the loop portion of said endless belt means and said forming roll, the latter having an outer surface formed with depressions which will determine the configuration of one face of a sheet issuing from said forming roll and traveling with said endless belt means at said upper run thereof around said trailing guide roller to said other end roll means, each of said end roll means consisting of a single guide roller having a diameter substantially larger than the diameter of said forming roll, and the parts of said upper run of said endless belt means which extend between said end guide rollers and said leading and trailing guide rollers being situateD in a common horizontal plane, a second feed means being situated over said upper run of said endless belt means at the part thereof traveling between said one end roll means and said leading guide roller, subsequent to said first-mentioned feed means, for depositing on a layer previously deposited by said first-mentioned feed means a series of continuous ridges of said material and said depressions of said forming roll being in the form of annular grooves respectively aligned with said ridges.

Claim 11

The combination of claim 5 and wherein said forming roll includes in each of said annular grooves thereof a plurality of transverse walls distributed circumferentially in each of said grooves and extending thereacross for providing interruptions distributed longitudinally along each rib which is formed in each groove.

Claim 12

The combination of claim 5 and wherein the end guide rollers and said forming roll respectively have their parallel axes situated at the same elevation.

Claim 13

In a machine for continuously producing a sheet, from a material, which is in comminuted form and includes a binder, a first set of components comprising endless belt means, a pair of end roll means cooperating with said endless belt means for guiding an upper run thereof from one to the other of said end roll means and a lower run thereof from said other back to said one end roll means, each of said end roll means including at least one roller engaging and guiding said endless belt means and said rollers having parallel axes, respectively, a rotary forming roll situated in its entirety between said pair of end roll means at an elevation higher than said lower run of said endless belt means and at an elevation lower than the uppermost parts of said pair of end roll means where said endless belt means travels from said one end roll means and is received at said other end roll means, said forming roll having an axis parallel to the axes of said guide rollers, an additional pair of guide rollers having axes parallel to the axis of said forming roll, said additional pair of guide rollers forming a leading and a trailing guide roller, said leading guide roller leading said endless belt means downwardly toward said forming roll to travel around the latter and said trailing guide roller receiving said endless belt means from said forming roll to lead said endless belt means to said other end roll means, said leading guide roller situating part of said upper run of said endless belt means which travels from said one end roll means to said leading guide roller in a horizontal plane and said trailing guide roller situating part of said upper run of said endless belt means also in a horizontal plane traveling from said trailing guide roller to said other end roll means, and said pair of additional guide rollers being situated at an elevation higher than said forming roll and closer to each other than the diameter of said forming roll for providing for said endless belt means at its upper run an intermediate loop portion extending around said forming roll through more than 180*, and at least one feed means situated over the part of said upper run of said endless belt means traveling from said one end roll means toward said leading guide roller at the region of said one end roll means for depositing on said upper run of said endless belt means a layer of said material to be directed between the loop portion of said endless belt means and said forming roll, the latter having an outer surface formed with depressions which will determine the configuration of one face of a sheet issuing from said forming roll and traveling with said endless belt means at said upper run thereof around said trailing guide roller to said other end roll means, and a second set of components comprising a second endless belt means together with a second pair of end roll means, a second forming roll and a second pair of additional guide rollers all cooperating in the same way with each other as the first mentioneD endless belt means, end roll means, forming roll, and guide rollers, with the second pair of components situated over the first set of components and having a total length shorter than the distance between said first-mentioned trailing guide roller and said first mentioned other end roll means, said second endless belt means having a lower run traveling in the same direction as that part of the upper run of said first-mentioned endless belt means which travels from said trailing guide roller to said first-mentioned other endless roll means, and at least one second feed means feeding a layer of said material to an upper run of said second endless belt means to be formed into a continuous sheet which engages the continuous sheet traveling along the upper run of said first-mentioned endless belt means to said other end roll means, and adhesive-applying means applying adhesive to at least one of said sheets for gluing them to each other as they are pressed together while traveling between the upper run of said first-mentioned endless belt means and the lower run of said second endless belt means.

Claim 14

In a machine for continuously producing a sheet, from a material, which is in comminuted form and includes a binder, a first set of components comprising endless belt means, a pair of end roll means cooperating with said endless belt means for guiding an upper run thereof from one to the other of said end roll means and a lower run thereof from said other back to said one end roll means, each of said end roll means including at least one roller engaging and guiding said endless belt means and said rollers having parallel axes, respectively, a rotary forming roll situated in its entirety between said pair of end roll means at an elevation higher than said lower run of said endless belt means and at an elevation lower than the uppermost parts of said pair of end roll means where said endless belt means travels from said one end roll means and is received at said other end roll means, said forming roll having an axis parallel to the axes of said guide rollers, an additional pair of guide rollers having axes parallel to the axis of said forming roll, said additional pair of guide rollers forming a leading and a trailing guide roller, said leading guide roller leading said endless belt means downwardly toward said forming roll to travel around the latter and said trailing guide roller receiving said endless belt means from said forming roll to lead said endless belt means to said other end roll means, said leading guide roller situating part of said upper run of said endless belt means which travels from said one end roll means to said leading guide roller in a horizontal plane and said trailing guide roller situating part of said upper run of said endless belt means also in a horizontal plane traveling from said trailing guide roller to said other end roll means, and said pair of additional guide rollers being situated at an elevation higher than said forming roll and closer to each other than the diameter of said forming roll for providing for said endless belt means at its upper run an intermediate loop portion extending around said forming roll through more than 180*, and at least one feed means situated over the part of said upper run of said endless belt means traveling from said one end roll means toward said leading guide roller at the region of said one end roll means for depositing on said upper run of said endless belt means a layer of said material to be directed between the loop portion of said endless belt means and said forming roll, the latter having an outer surface formed with depressions which will determine the configuration of one face of a sheet issuing from said forming roll and traveling with said endless belt means at said upper run thereof around said trailing guide roller to said other end roll means, and a second set of components comprising a second endless belt means together with a second pair of end roll means, a second forming roll and a second pair of additional guide rollers all cooperating in the same way with each other as the first mentioneD endless belt means, end roll means, forming roll, and guide rollers, with the second pair of components situated over the first set of components and having a total length shorter than the distance between said first-mentioned trailing guide roller and said first mentioned other end roll means, said second endless belt means having a lower run traveling in the same direction as that part of the upper run of said first-mentioned endless belt means which travels from said trailing guide roller to said first-mentioned other endless roll means, and at least one second feed means feeding a layer of said material to an upper run of said second endless belt means to be formed into a continuous sheet which engages the continuous sheet traveling along the upper run of said first-mentioned endless belt means to said other end roll means, and adhesive-applying means applying adhesive to at least one of said sheets for gluing them to each other as they are pressed together while traveling between the upper run of said first-mentioned endless belt means and the lower run of said second endless belt means.

Claim 15

The combination of claim 8 and wherein a pair of endless pressure belt means respectively engage the lower surface of said upper run of said first-mentioned endless belt means where the latter travels between said trailing guide roller and said first-mentioned other end roll means and the upper surface of the lower run of said second endless belt means for pressing the latter runs toward each other to press the sheets toward each other.

Claim 16

The combination of claim 9 and wherein the plurality of second components situated over the plurality of first-mentioned components are adjustable with respect to said first-mentioned components.