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Patent US4374687A successfully refreshed from Google Patents.
US4374687A
Expired / Lapsed
US
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Process for making a built-up thermal insulating and bituminous waterproofing assembly
Assignee: Tajima Roofing Inc
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Filing: 1980-11-28
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Granted: 1983-02-22
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Expires: 2000-11-28
Abstract
Abstract A built-up bituminous waterproofing and thermal insulation assembly made by the process of placing onto a substrate a plurality of prefabricated, thermal insulating bituminous waterproofing boards adjacent to one another with the edges of the boards being slightly spaced to provide clearances therebetween, sealing the clearances with sealing material and then forming a continuous waterproofing layer over the entire upper surface of the boards and sealing material.
Inventors
- 👤 Kaname Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:02
CPC Classifications
B; B32; B32B; B32B11/00; B32B11/10; B32B11/02; B32B11/04; B32B11/046; B32B11/12; B32B5/00; B32B5/16; E; E04; E04D; E04D11/00; E04D11/02; E04D3/00; E04D3/35; E04D3/351; E04D3/352; B32B2262/00; B32B2262/10; B32B2262/101; B32B2307/00; B32B2307/30; B32B2307/304; B32B2307/70; B32B2307/726; B32B2307/7265; B32B2315/00; B32B2315/08; B32B2315/085; B32B2395/00; B32B2419/00; B32B2419/06; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10T; Y10T428/00; Y10T428/14; Y10T428/141; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/249921; Y10T428/249953; Y10T428/249967; Y10T428/249969; Y10T428/249987; Y10T428/26; Y10T428/31504; Y10T428/31815; Y10T442/00; Y10T442/30; Y10T442/3325; Y10T442/60; Y10T442/647
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
313 words
A process for making a built-up bituminous waterproofing and thermal insulation assembly, comprising the steps of: (a) placing onto the surface of a substrate a plurality of prefabricated, thermal insulating and bituminous waterproofing boards, each consisting essentially of (i) a thermal insulating layer having an upper surface and a lower surface, said thermal insulating layer being made of thermal insulating material; (ii) a first, flat, fibrous sheet having an upper surface and a lower surface, the lower surface of said first sheet being bonded to the upper surface of said thermal insulating layer in direct, face-to-face, mutually adhering contact; (iii) a modified bitumen layer having a thickness within the range of from 2 to 25 mm and having an upper surface and a lower surface, said modified bitumen layer consisting essentially of a uniform mixture of waterproofing bitumen and 50% to 90% by weight, based on the total weight of the mixture, of pieces of at least one inorganic filler, the lower surface of said modified bitumen layer being bonded to the upper surface of said first sheet in direct, face-to-face, mutually adhering contact; and (iv) a second, flat, fibrous sheet having an upper surface and a lower surface, the lower surface of said second sheet being bonded to the upper surface of said modified bitumen layer in direct, face-to-face, mutually adhering contact, said boards being placed onto the substrate surface adjacent to one another with the edges of said boards being slightly spaced to provide clearances therebetween, said boards forming a layer on said substrate surface with the thermal insulating layer of each of said boards being in close adhering contact with said substrate surface; (b) then sealing the clearances between said boards with sealing material; and (c) then forming a continuous, waterproofing layer over the entire upper surface of said boards and said sealing material, said waterproofing layer being integral therewith.
Claim 2
Dependent Claim
313 words
A process for making a built-up bituminous waterproofing and thermal insulation assembly, comprising the steps of: (a) placing onto the surface of a substrate a plurality of prefabricated, thermal insulating and bituminous waterproofing boards, each consisting essentially of (i) a thermal insulating layer having an upper surface and a lower surface, said thermal insulating layer being made of thermal insulating material; (ii) a first, flat, fibrous sheet having an upper surface and a lower surface, the lower surface of said first sheet being bonded to the upper surface of said thermal insulating layer in direct, face-to-face, mutually adhering contact; (iii) a modified bitumen layer having a thickness within the range of from 2 to 25 mm and having an upper surface and a lower surface, said modified bitumen layer consisting essentially of a uniform mixture of waterproofing bitumen and 50% to 90% by weight, based on the total weight of the mixture, of pieces of at least one inorganic filler, the lower surface of said modified bitumen layer being bonded to the upper surface of said first sheet in direct, face-to-face, mutually adhering contact; and (iv) a second, flat, fibrous sheet having an upper surface and a lower surface, the lower surface of said second sheet being bonded to the upper surface of said modified bitumen layer in direct, face-to-face, mutually adhering contact, said boards being placed onto the substrate surface adjacent to one another with the edges of said boards being slightly spaced to provide clearances therebetween, said boards forming a layer on said substrate surface with the thermal insulating layer of each of said boards being in close adhering contact with said substrate surface; (b) then sealing the clearances between said boards with sealing material; and (c) then forming a continuous, waterproofing layer over the entire upper surface of said boards and said sealing material, said waterproofing layer being integral therewith.
Claim 3
Dependent Claim
20 words
A process as claimed in claim 1, wherein said waterproofing layer is formed by using one or more roofing sheets.
Claim 4
Dependent Claim
47 words
A process as claimed in claim 1, wherein said prefabricated boards are each adhered onto said substrate surface by humidityproof adhesive sheets interposed between said substrate surface and said boards, said adhesive sheets having rubberized bitumen layers having high adhesiveness on the upper and lower faces thereof.
Claim 5
Dependent Claim
64 words
A process as claimed in claim 1, wherein said sealing material is a sealing tape comprising (i) a fibrous base sheet; and (ii) a pair of rubberized bitumen coating layers having high adhesiveness laminated onto the upper and lower surfaces, respectively, of said base sheet, one of said layers (ii) being placed in direct, face-to-face, mutually adhering contact with at least two adjacent boards.
Claim 6
Dependent Claim
103 words
A process as claimed in claim 1, wherein said sealing material is a sealing tape comprising (i) a release sheet having a releasable upper surface and a non-releasable lower surface, said upper surface of said release sheet being releasable relative to said waterproofing layer and not adhered thereto, and (ii) a rubberized bitumen layer having high adhesiveness and having an upper surface and a lower surface, said upper surface of said rubberized bitumen layer being adhesively secured to said lower surface of said release sheet and the lower surface of said rubberized bitumen layer being adhesively secured to at least two adjacent boards.
Claim 7
Dependent Claim
76 words
A process as claimed in claim 1, wherein said continuous and integral waterproofing layer is formed by placing bituminous roofing sheets onto the upper surfaces of said adjacent boards in direct, face-to-face contact therewith, each of said bituminous roofing sheets comprising a thick bitumen layer, and heating said roofing sheets thereby to soften said thick bitumen layers to bond same to said boards whereby to form said continuous waterproofing layer which is integral with said boards.
Claim 8
Dependent Claim
57 words
A process as claimed in claim 6, wherein said bituminous roofing sheets each further comprise a mineral layer made of a material selected from the group consisting of mineral granules, mineral powder and mineral flakes, said mineral layer being applied on top of said thick bitumen layer, said mineral layer being the uppermost layer of said assembly.
Claim 9
Dependent Claim
19 words
A process as claimed in claim 6, wherein said thick bitumen layer is from 1 to 3 mm thick.
Claim 10
Dependent Claim
58 words
A process as claimed in claim 6, wherein said bituminous roofing sheets each further comprise a release sheet in direct, face-to-face contact with said thick bitumen layer, and comprising the further step of removing said release sheet and separating it from said thick bitumen layer before placing said bituminous roofing sheet onto the upper surface of said boards.
Claim 11
Dependent Claim
17 words
A process as claimed in claim 1, wherein said first and second sheets are non-woven glass fabrics.
Claim 12
Dependent Claim
70 words
A process as claimed in claim 1, wherein said first and second sheets are non-woven glass fabrics and said thermal insulating layer consists essentially of rigid polyurethane foam, said first sheet being impregnated with bitumen in such a manner that the bitumen does not exude to the lower surface thereof, whereby said rigid polyurethane foam is bonded through said lower surface of said first sheet to said modified bitumen layer.
Claim 13
Dependent Claim
40 words
A process as claimed in claim 1, wherein a bitumen or rubberized bitumen coating layer is coated onto said upper surface of said second flat sheet, and a release sheet is laminated on the upper surface of said coating layer.
Claim 14
Dependent Claim
42 words
A process as claimed in claim 1, wherein a bitumen or rubberized bitumen coating layer is coated onto said upper surface of said second flat sheet, and mineral granules, powder or flakes are deposited on the upper surface of said coating layer.
Claim 15
Dependent Claim
57 words
A process as claimed in claim 1, in which said modified bitumen layer has a thickness of from 5 to 10 mm and said inorganic filler is selected from the group consisting of calcium carbonate, clay, talc, aluminum hydroxide, mica, silica, graphite, carbon black, sand, fine gravel, crushed stone, asbestos, glass fibers, rock wool and mixtures thereof.
Claim 16
Dependent Claim
60 words
A process as claimed in claim 14, in which said thermal insulating layer is made of a material selected from the group consisting of rock wool, slag wool, asbestos, glass fiber, foamed glass, foamed polystyrene, foamed polyethylene, foamed acrylic resin, foamed phenol resin, foamed urea resin, foamed epoxy resin, foamed diallylphthalate resin, foamed polyurethane resin, foamed rubber and wood chipboard.
Claim 17
Dependent Claim
60 words
A process as claimed in claim 15, wherein each of said boards have been prepared by shaping a composition in which said bitumen is molten to form said modified bitumen layer, laminating said first and second sheets by pressing same against the opposite surfaces of said modified bitumen layer, and then applying said thermal insulating layer onto said first sheet.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-21 | 1986-08-23 | 1987-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-21 | 1990-08-23 | 1991-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-21 | 1994-08-23 | 1995-02-22 | $7700.00 | Window Closed / Lapsed |