Patents Assigned to BPB plc
-
Publication number: 20100203317Abstract: A method of forming a gypsum-based panel product including the steps of: mixing calcined gypsum, water, a foaming agent and a core strengthening agent to form a foamed slurry; depositing the slurry; shaping the slurry to form a board having a core and core surfaces, optionally sandwiched between sheets of liner; and allowing the core to set, and drying the board, wherein the strengthening agent is dextrin, used in an amount not less than 0.1% by weight, based on the amount of calcined gypsum, so that, after drying, there is provided a strengthening dispersion of dextrin throughout the core. Less than 5% dextrin in preferred.Type: ApplicationFiled: March 30, 2010Publication date: August 12, 2010Applicant: BPB plcInventor: Parnika Sahay
-
Patent number: 7708847Abstract: A method of forming a gypsum-based panel product including the steps of: mixing calcined gypsum, water, a foaming agent and a core strengthening agent to form a foamed slurry; depositing the slurry; shaping the slurry to form a board having a core and core surfaces, optionally sandwiched between sheets of liner; and allowing the core to set, and drying the board, wherein the strengthening agent is dextrin, used in an amount not less than 0.1% by weight, based on the amount of calcined gypsum, so that, after drying, there is provided a strengthening dispersion of dextrin throughout the core. Less than 5% dextrin in preferred.Type: GrantFiled: June 12, 2006Date of Patent: May 4, 2010Assignee: BPB plcInventor: Parnika Sahay
-
Publication number: 20090025880Abstract: A multilayer gypsum board forming device, and a gypsum additive delivery system in which additives are delivered to one or more layers of a multi layered gypsum board panels, including engineered polymers, includes at least one additive assembly connected in-line with a first gypsum delivery receptacle for providing an additive fluid feed into the stream of a first gypsum slurry being transported through said first gypsum delivery receptacle for homogenously adding an additive to the first gypsum slurry, and a second gypsum delivery receptacle transporting a second gypsum slurry, in fluid communication with the mixer providing the first gypsum slurry, having a different set of characteristics from those of the first gypsum slurry. At least one outer surface including a polymeric compound or wax emulsion additive entrained therein essentially encases the core gypsum within two facing layers.Type: ApplicationFiled: September 25, 2008Publication date: January 29, 2009Applicant: BPB plcInventors: Mark E. HENNIS, Michael P. FAHEY, Robert J. HAUBER, Matthew J. CHOWNING, Gerald D. BOYDSTON, Troy R. STUART
-
Patent number: 7435369Abstract: A method of manufacture of multilayer gypsum board, and a gypsum additive delivery system, including wet gypsum board passing through a board forming station in which additives are delivered to one or more layers of a multi layered gypsum board panels, such as engineered polymers, providing a better and more water resistance surface. Preferably, the gypsum board has a first layer of a mixture of set gypsum having an outer surface and a polymeric compound or wax emulsion additive entrained therein and impregnated in a thin sheet of randomly aligned inorganic fibers to essentially encase the core gypsum within two facing layers.Type: GrantFiled: October 19, 2004Date of Patent: October 14, 2008Assignee: BPB plcInventors: Mark E. Hennis, Michael P. Fahey, Robert J. Hauber, Matthew J Chowing, Gerald D. Boydston, Troy R. Stuart
-
Patent number: 7421829Abstract: A drywall panel installation tool provides engagement for the trailing edge of a drywall panel that is being installed having an internal or external radius curved surface. The tool may include a first flat plate having apertures therein for insertion of the fasteners, a second surface extending from a longitudinal edge of the flat plate and a flange or lip for engaging an edge of the drywall panel, the flange extending from a second longitudinal edge of the flat plate in a direction opposite to that of the extension of the first surface.Type: GrantFiled: August 27, 2004Date of Patent: September 9, 2008Assignee: BPB plcInventor: William M. Gwynn
-
Patent number: 7387704Abstract: A non-woven mat of inorganic fiber is disclosed having a substance which is lower at the edges of the mat than in the remainder of the mat. Apparatus for making such a mat includes: a source of a slurry of inorganic fiber in a liquid; a forming wire disposed to move past the source, the liquid passing through the forming wire to deposit the inorganic fiber on the forming wire; a mask across a part of the width of the forming wire to hinder passage of the liquid through the forming wire over the part, the effectiveness of the mask varying in the direction of movement of the forming wire past the slurry source.Type: GrantFiled: January 4, 2005Date of Patent: June 17, 2008Assignees: BPB PLC, Moy Isover LimitedInventors: John Walters, Jocelyn Fitzsimons
-
Patent number: 7384514Abstract: A non-woven mat of inorganic fiber is disclosed having a substance which is lower at the edges of the mat than in the remainder of the mat. Apparatus for making such a mat includes: a source of a slurry of inorganic fiber in a liquid; a forming wire disposed to move past the source, the liquid passing through the forming wire to deposit the inorganic fiber on the forming wire; a mask across a part of the width of the forming wire to hinder passage of the liquid through the forming wire over the part, the effectiveness of the mask varying in the direction of movement of the forming wire past the slurry source.Type: GrantFiled: January 4, 2005Date of Patent: June 10, 2008Assignees: BPB PLC, Moy Isover LimitedInventors: John Walters, Jocelyn Fitzsimons
-
Patent number: 7326478Abstract: The invention concerns a plate whereof the body comprises a binder containing Portland cement, a sulphoaluminous clinker and a calcium sulphate source: the binder comprises, by weight 30 to 80% of Portland cement, 20 to 70% of sulphoaluminous binder, 5 to 20% of a calcium sulphate source, and 0.4 to 7% of a water-reducing plasticizer or highly waterreducing superplasticizer admixture; it contains light aggregates in an amount such that the final density is close to 1, of the order of 0.8 to 1.5.Type: GrantFiled: June 6, 2002Date of Patent: February 5, 2008Assignee: BPB PLCInventors: Patrice Bouscal, Frédéric Chantereau, Adrien Colombet, legal representative, Christian Derusco, Bruno Le Rolland, Gilbert Noworyta, Pierre Colombet, deceased
-
Publication number: 20060266265Abstract: A method of manufacturing a multilayered cementitious product comprising the steps of combining a cementitious material with water within a mixing container so as to form an aqueous slurry discharging the slurry from said mixing container through an outlet onto a support and inserting a setting accelerator into said slurry at or close to the outlet of the mixing container.Type: ApplicationFiled: October 15, 2003Publication date: November 30, 2006Applicant: BPB PLCInventors: Samantha O'Keefe, Andreas Wicht, Matthew Wood
-
Patent number: 7060639Abstract: A non-woven mat of inorganic fiber is disclosed having a substance which is lower at the edges of the mat than in the remainder of the mat. Apparatus for making such a mat includes: a source of a slurry of inorganic fiber in a liquid; a forming wire disposed to move past the source, the liquid passing through the forming wire to deposit the inorganic fiber on the forming wire; a mask across a part of the width of the forming wire to hinder passage of the liquid through the forming wire over the part, the effectiveness of the mask varying in the direction of movement of the forming wire past the slurry source.Type: GrantFiled: January 23, 1998Date of Patent: June 13, 2006Assignees: BPB PLC, Moy Isover LimitedInventors: John Walters, Jocelyn Fitzsimons
-
Patent number: 6878321Abstract: Gypsum board having inorganic fiber, preferably glass fiber, preferably glass fiber, includes providing face sheets which have been completely impregnated with a gypsum slurry so as to penetrate through said random interstices between the inorganic fibers and to thereby cover the board surfaces with gypsum slurry. The gypsum board product is formed by passing the wet gypsum board through a board forming station having double forming plates, an upper forming plate having at least a portion thereof being set at a predetermined angle relative to a lower forming plate and having a separation between the forming plates defining a predetermined dimension substantially equal to the desired thickness of the manufactured gypsum board product. The method provides a multilayer gypsum board having a polymeric compound added to unset gypsum so as to provide a gypsum board ready for finishing.Type: GrantFiled: November 30, 2001Date of Patent: April 12, 2005Assignee: BPB plcInventors: Robert J. Hauber, Christopher J. Sanders, Mark E. Hennis, Michael P. Fahey
-
Patent number: 6866492Abstract: A gypsum board forming device having a gypsum forming station including two laterally disposed edger shoes, and at least one laterally disposed edger bar clamping element on the edger bar. In one embodiment a laterally extending forming plate extends over the top surface of the formed gypsum board, the forming plate including a plurality of micropore conduits through which pressurized water is supplied to provide a film of smoothing water over the top surface of the gypsum board. In another embodiment the edger shoes have a flapper mechanism for retaining unset slurry skimmed off the surface of the gypsum board by the edger bar.Type: GrantFiled: June 4, 2002Date of Patent: March 15, 2005Assignee: BPB plcInventors: Robert J. Hauber, Christopher J. Sanders, Mark E. Hennis, Michael P. Fahey
-
Publication number: 20040258901Abstract: An extrudable gypsum plaster paste is disclosed comprising: &agr; gypsum plaster, water in a substantially stoichiometric amount; a binder; and a clay or another rheology modifier functionally equivalent to a clay. Such pastes can have a yield stress sufficient to make the paste self supporting. The invention also provides a method for making an extrudable gypsum plaster paste comprising: mixing &agr; gypsum plaster, water in a substantially stoichiometric amount and a binder; and mixing into that mixture a clay or other rheology modifier functionally equivalent to a clay.Type: ApplicationFiled: April 14, 2004Publication date: December 23, 2004Applicant: BPB PLC.Inventors: Lydia Luckevich, Peter Mayer, Jason Davies
-
Patent number: 6616768Abstract: A method of processing perforated gypsum boards is disclosed. When the gypsum boards have been perforated the following steps are performed while the boards are being moved individually along a path. The moving boards are sprayed with pressurized water which is directed towards the opposite surfaces of the boards so as to enter apertures or slots formed by the perforation of the boards, and then water is removed from the moving boards by blowing pressurized air against the boards and sucking water therefrom, wherein dust on the boards is entrained into the water and removed from the boards together with the water.Type: GrantFiled: June 27, 2001Date of Patent: September 9, 2003Assignee: BPB PLCInventor: Benni Madsen
-
Patent number: 6524679Abstract: A multilayer gypsum board having face sheets comprising inorganic fiber, preferably randomly oriented glass fiber, which have been completely impregnated with a gypsum slurry so as to penetrate through the random interstices between the inorganic fibers and to thereby coat the board surfaces with gypsum slurry. The multilayer gypsum board may have a polymeric compound added to unset gypsum the compound may comprise any of the following: polyacrylamide, polymethylacrylamide, polyvinyidene chloride (PVDC), polyamide, poly (hexamethylene adipamide), polyvinylchloride (PVC), polyethylene, cellulose acetate, polyisobutylene, polycarbonate, polypropylene, polystyrene, polychloroprene, styrene, butadiene, natural rubber, poly (2,6 dimethyl pentene oxide), poly (4-methyl-1-pentene) and polydimethyl siloxane.Type: GrantFiled: June 6, 2001Date of Patent: February 25, 2003Assignee: BPB, plcInventors: Robert J. Hauber, Christopher J. Sanders, Mark E. Hennis, Michael P. Fahey
-
Patent number: 6334280Abstract: A die assembly for providing a gypsum ceiling tile having improved acoustic absorption properties includes a punch plate having punches which form perforations through a plasterboard tile and indentors which form indentations in the tile. The punches and indentors are arranged in elongate strips to produce fissure-like perforations and indentations. A stripper plate having apertures corresponding to the punches and indentors and a die plate having apertures corresponding to the punches sandwich the tile, and the punch plate is applied to the tile.Type: GrantFiled: August 7, 1998Date of Patent: January 1, 2002Assignee: BPB PLCInventors: Etienne Frappart, David Townsend, William John McMillan, Utkarsha Joshi, William Bell Devereux
-
Patent number: 5988881Abstract: Multi-walled paper sacks for powder products, notably plaster, have a porous paper inner wall surrounded by a paper outer wall and a vapour barrier separate from the paper inner wall. The vapour barrier may be a coating on the inside face of the outer paper wall. Perforations through the vapour barrier are substantially confined to either or both of the broad faces of the sack. During filling of the sacks air is able to vent through the inner wall and then through the perforations in the vapour barrier, allowing filling by high speed machinery. Deterioration of the product as a result of moisture perforation is unexpectedly just as good, and sometimes superior, to that encountered with alternative sacks. Consequently the improvement in filling is not encumbered by a reduction in shelf life of the product.Type: GrantFiled: June 17, 1998Date of Patent: November 23, 1999Assignee: BPB PLCInventor: Robert Sutherland
-
Patent number: D520344Type: GrantFiled: March 11, 2004Date of Patent: May 9, 2006Assignee: BPB plcInventor: Bo Vejmarker
-
Patent number: D536240Type: GrantFiled: March 6, 2006Date of Patent: February 6, 2007Assignee: BPB plcInventor: Bo Vejmarker
-
Patent number: D536952Type: GrantFiled: March 6, 2006Date of Patent: February 20, 2007Assignee: BPB plcInventor: Bo Vejmarker