# US 6,432,252 B1 · Method and an apparatus for the manufacture of a bituminous coating sheet and such coating sheet > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 6,432,252 B1 - Document ID: US6432252B1 - Status: Granted - Kind: B1 - Application number: 09/622,789 - Filed: 2000-08-23 - Granted: 2002-08-13 - Earliest claimed: 1998-02-24 - Assignees: Icopal A/S - Inventors: John Ejrup Olsen - Web page: https://patentgrep.com/patent/US6432252B1 ## CPC - D06N 5/00: {Roofing materials comprising a fibrous web coated with bitumen or another polymer, e.g. pitch (compositions of bituminous materials C08L95/00, roof covering E04D5/00, roofing underlays E04D12/002)} - B32B 37/26: with at least one layer which influences the bonding during the lamination process, e.g. release layers or pressure equalising layers - E04D 5/10: by making use of compounded or laminated materials, e.g. metal foils or plastic films coated with bitumen - B32B 2395/00: Bituminous material, e.g. tar, asphalt - D06N: WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - E04D: ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS (coverings of outer walls by plaster or other porous material E04F13/00) ## Abstract A method of manufacturing a bituminous coating sheet, wherein a bitumen-impregnated core material provided with a layer of backface bitumen is caused to be in contact with one or more rotating bodies during the manufacture. A slip material dispersed/emulsified or dissolved in a liquid is applied onto the bituminous backface layer on the side that is to be brought into contact with a rotating body; and that the liquid is evaporated prior to contact with the rotating body; and that subsequently a further bituminous layer is applied onto the side which is provided with said slip material. ## Claims ### Claim 1 A method of manufacturing a bituminous coating sheet, wherein a bitumen-impregnated core material is provided with a layer of backface bitumen and wherein a slip material is applied on said backface bitumen in a slip material application station, said bitumen-impregnated core material with said backface bitumen and said slip material being further advanced in contact with one or more rotating bodies during manufacture, said slip material preventing said backface bitumen on said bitumen-impregnated core material from sticking to said rotating bodies during said further advancement, said method including the steps of a) preparing a dispersion of said slip material in a liquid, b) applying said dispersion on said layer of backface bitumen on said bitumen-impregnated core material in said slip material application station, c) evaporating said liquid prior to said contact with said rotating bodies thereby cooling said backface bitumen and leaving said slip material on said backface bitumen, said bitumen-impregnated core material with said layer of backface bitumen having a temperature ranging between 100° C. and 200° C. when applying said dispersion and providing energy for evaporating said liquid, and d) applying a further bituminous layer on said slip material on said layer of backface bitumen following said slip material making contact with said rotating bodies. ### Claim 2 (depends on 1) A method according to claim 1, wherein said dispersion is applied by spraying. ### Claim 3 (depends on 1) A method according to claim 1, wherein said bitumen-impregnated core material with said backface bitumen layer has a temperature ranging between 120° C. and 160° C. when applying said dispersion. ### Claim 4 (depends on 1) A method according to claim 1, wherein said slip material is a polymer material. ### Claim 5 (depends on 1) A method according to claim 1, wherein said slip material is a thermoplastic polymer material. ### Claim 6 (depends on 1) An apparatus for exercising the method according to claim 1 comprising rotating bodies for conveying said coating sheet and a slip material application station for applying said dispersion on said layer of backface bitumen. ### Claim 7 (depends on 6) An apparatus according to claim 6, wherein said slip material application station consists of one or more nozzles to which said dispersion is supplied under pressure. ### Claim 8 (depends on 6) An apparatus according to claim 6, wherein said slip material application station is arranged at a distance from a first of said rotating bodies so that the liquid contents of said dispersion is evaporated prior to said coating sheet contacting said rotating body. ### Claim 9 A method of manufacturing a bituminous coating sheet, wherein a bitumen-impregnated core material is provided with a layer of backface bitumen and wherein a slip material is applied on said backface bitumen in a slip material application station, said bitumen-impregnated core material with said backface bitumen and said slip material being further advanced in contact with one or more rotating bodies during manufacture, said slip material preventing said backface bitumen on said bitumen-impregnated core material from sticking to said rotating bodies during said further advancement, said method including the steps of a) preparing an emulsion of said slip material in a liquid, b) applying said emulsion on said layer of backface bitumen on said bitumen-impregnated core material in said slip material application station, c) evaporating said liquid prior to said contact with said rotating bodies thereby cooling said backface bitumen and leaving said slip material on said backface bitumen, said bitumen-impregnated core material with said layer of backface bitumen having a temperature ranging between 100° C. and 200° C. when applying said emulsion and providing energy for evaporating said liquid, and d) applying a further bituminous layer on said layer of said slip material applied on said layer of backface bitumen following said layer of slip material making contact with said rotating bodies. ### Claim 10 (depends on 9) A method according to claim 9, wherein said emulsion is applied by spraying. ### Claim 11 (depends on 9) A method according to claim 9, wherein said bitumen-impregnated core material with said layer of backface bitumen has a temperature ranging between 120° C. and 160° C. when applying said dispersion. ### Claim 12 (depends on 9) A method according to claim 9, wherein said slip material is a polymer material. ### Claim 13 (depends on 9) A method according to claim 9, wherein said slip material is a thermoplastic polymer material. ### Claim 14 (depends on 9) An apparatus for exercising the method according to claim 9 comprising rotating bodies for conveying said coating sheet and a slip material application station for applying said emulsion on said layer of backface bitumen. ### Claim 15 (depends on 14) An apparatus according to claim 14, wherein said slip material application station consists of one or more nozzles to which said emulsion is supplied under pressure. ### Claim 16 (depends on 14) An apparatus according to claim 14, wherein said slip material application station is arranged at a distance from a first of said rotating bodies so that the liquid contents of said emulsion is evaporated prior to said coating sheet contacting said rotating body. ### Claim 17 A method of manufacturing a bituminous coating sheet, wherein a bitumen-impregnated core material is provided with a layer of backface bitumen and wherein a slip material is applied on said backface bitumen in a slip material application station, said bitumen-impregnated core material with said backface bitumen and said slip material being further advanced in contact with one or more rotating bodies during manufacture, said slip material preventing said backface bitumen on said bitumen-impregnated core material from sticking to said rotating bodies during said further advancement, said method including the steps of a) preparing a solution of said slip material in a liquid, b) applying said solution on said layer of backface bitumen on said bitumen-impregnated core material in said slip material application station, c) evaporating said liquid prior to said contact with said rotating bodies thereby cooling said backface bitumen and leaving said slip material on said backface bitumen, said bitumen-impregnated core material with said layer of backface bitumen having a temperature ranging between 100° C. and 200° C. when applying said solution and providing energy for evaporating said liquid, and d) applying a further bituminous layer on said layer of said slip material applied on said layer of backface bitumen following said layer of slip material making contact with said rotating bodies. ### Claim 18 (depends on 17) A method according to claim 17, wherein said solution is applied by spraying. ### Claim 19 (depends on 17) A method according to claim 17, wherein said bitumen impregnated core material with said backface bitumen layer has a temperature ranging between 120° C. and 160° C. when applying said solution. ### Claim 20 (depends on 17) A method according to claim 17, wherein said slip material is a polymer material. ### Claim 21 (depends on 17) A method according to claim 17, wherein said slip material is a thermoplastic polymer material. ### Claim 22 (depends on 17) An apparatus for exercising the method according to claim 17 comprising rotating bodies for conveying said coating sheet and a slip material application station for applying said solution on said layer of backface bitumen. ### Claim 23 (depends on 22) An apparatus according to claim 22, wherein said slip material application station consists of one or more nozzles to which said solution is supplied under pressure. ### Claim 24 (depends on 22) An apparatus according to claim 22, wherein said slip material application station is arranged at a distance from a first of said rotating bodies so that the liquid contents of said dispersion is evaporated prior to said coating sheet contacting said first rotating body.