US3503837A - Reinforced bitumen covering with sheet-metal protection - Google Patents

Reinforced bitumen covering with sheet-metal protection Download PDF

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Publication number
US3503837A
US3503837A US354324A US3503837DA US3503837A US 3503837 A US3503837 A US 3503837A US 354324 A US354324 A US 354324A US 3503837D A US3503837D A US 3503837DA US 3503837 A US3503837 A US 3503837A
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US
United States
Prior art keywords
bitumen
covering
sheet
aluminium
portions
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.)
Expired - Lifetime
Application number
US354324A
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English (en)
Inventor
Pierre Louis Cheval
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.)
Siplast SA
Original Assignee
Siplast 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
Application filed by Siplast SA filed Critical Siplast SA
Application granted granted Critical
Publication of US3503837A publication Critical patent/US3503837A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
    • E04D5/10—Roof covering by making use of flexible material, e.g. supplied in roll form by making use of compounded or laminated materials, e.g. metal foils or plastic films coated with bitumen
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
    • E04D13/15—Trimming strips; Edge strips; Fascias; Expansion joints for roofs
    • E04D13/151—Expansion joints for roofs
    • 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.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y10T428/24446—Wrinkled, creased, crinkled or creped
    • 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
    • Y10T428/24612—Composite web or sheet
    • 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
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31652—Of asbestos
    • Y10T428/31663—As siloxane, silicone or silane
    • 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
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
    • Y10T428/31717—Next to bituminous or tarry residue

Definitions

  • a roof-covering material comprising in association an unbroken strip or band of metal of high coeflicient of expansion, e.g. aluminium, and a layer of bitumen, wherein at selected spaced intervals the band or strip of the material is formed with transverse zones or lines of weakness of the metal, or of its connection to the bitumen layer, in order to facilitate the release of stresses of the metal in relation to the bitumen covering when the material expands.
  • a covering of this character consists as a rule of a bitumen sheet having a strength of 0.6 to 1 lb. per sq. ft., reinforced with a support-forming textile fabric such as cloth or fiberglass sheet, and comprises on its top face a plain or crinked aluminium sheet adapted to protect the bitumen against ageing.
  • This covering is characterized by a known draw-back when it is applied to a roof subject to substantial changes in temperature and comprising a strong heat insulation, due to the unequal expansion of the strips of metal lining, especially if these are relatively long, for instance several yards long.
  • the temperature of the aluminium sheet rises to, say, 122 to 149 F. (50 to 65 C.)
  • this temperature increase is transmitted to the underlying layer of bitumen which becomes softer, without any possibility for the heat to be dispersed due to the presence of the heat insulation.
  • the aluminium sheet expands and becomes subject to compressive stress as long the bitumen remains at a low temperature, that is, very rigid, and counteracts the aluminium expansion.
  • the aluminium sheet expands and is elongated, but due to the unequal heating of the different surface zones of the roof wrinkles develop between the hot zones and the colder zones, the elongation occurring in the hot zones to a sub stantial extent which may become permanent, and being prevented, as already explained hereina-bove, in the cold zones.
  • a covering may consist of strips for example 30-feet long assembled along their major sides, each strip comprising a bitumen covering 1 (FIGURE 1) lined on one face with a thin aluminium sheet or layer of metallic foil 2, for example 0.003" thick, creased or not, these strips being for example 3 feet wide and welded by juxtaposition with a 2-inch overlap, according to the conventional technique, the aluminium expansion question arising in the longitudinal direction only, not in the transverse direction.
  • these strips are formed with thinner portions 3 obtained by rolling the aluminium to reduce its thickness from 0.003" to 0.0008", these thinner portions being about 0.08 wide and spaced about 16 inches apart and connected by connecting portions which are not reduced in thickness.
  • FIGURE 2 shows in section a strip 1 provided, on its top face on which the aluminium sheet 2 is to be applied, with transverse portions 5 of a suitable nonadherent or adherence-inhibiting product such as silicone, thereby altering along these portions the adherence of the metal on the bitumen covering.
  • a suitable nonadherent or adherence-inhibiting product such as silicone
  • FIGURE 3 illustrates a metal sheet having formed on its inner face along spaced transverse portions a plurality of strips coated with adherence-inhibiting product such as soft bitumen 4.
  • This bitumen may be petroleum bitumen having a softening temperature of the order of 122 F. (50 (3.).
  • the transverse portions formed on the aluminium sheet transversely to the'direction of expansion thereof break the continuity of the adherence of the aluminium or other metal on the bitumen and permit of reducing to reasonable limits the effects of heat expansion without creating wrinkles or swellings likely to impair the watertightness of the covering.
  • FIGURE 4 illustrates diagrammatically a typical eX- ample of an arrangement for preparing coverings of the type described in Example III hereinabove.
  • a web of fiberglass fabric 6 is delivered continuously at a regular rate from a feed roll 7, and a web or strip 8 of aluminium or any other suitable metal having a high coefiicient of thermal expansion, such as zinc or copper, coloured or not, is paid out from another roll 9 in synchronism with the fiberglass fabric 6 and the two webs are applied against each other as they pass over a cylinder 16; molten bitumen is fed into the vat 10 and adheres to both sides of the fiberglass fabric web to form the composite reinforced bitumen covering 1 of a thickness varying as a function of the bitumen feed and of the peripheral speed of the rolls delivering the fiberglass fabric and the metal.
  • the metal sheet may be wrinkled or corrugated by moving between a pair of rollers 11, 12; its inner face is provided with spaced transverse strips 4 of soft bitumen, the relative spacing of these transverse strips or portions is adjustable in relation to the direction of feed; this deposit is effected by means of blades or doctors 14 mounted on the outer periphery of a cylinder 15 revolving at a speed corresponding to that of said'rolls, these blades or doctors 14 dipping by turns into the container 13 fed with soft bitumen.
  • the adherence of the metal strip on the bitumen covering reinforced by fabric or fiberglass cloth is discontinued along the transverse portions where the metal strip is coated with antiadherent or adherence-inhibiting product.
  • the composite strip thus obtained is subsequently treated in the conventional manner by applying thereto the usual cooling, sandblasting and lateral trimming steps.
  • An improved laminated roofing material comprising, a bitumen layer, a continuous sheet of metallic foil covering one side of said bitumen layer, said sheet of metallic foil comprising a plurality of longitudinally extending, spaced connected portions and a plurality of longitudinally extending intermediate, connecting portions adhesively adhered to said bitumen layer, means comprising structure built into said roofing material coextensive with the first-mentioned portions causing the first-mentioned portions in use to contract and expand relative to said bitumen layer differently than said connecting portions, said means comprises a series of longitudinally extending spaced portions composed of a bitumen composition softer than the coextensive bitumen layer and disposed substantially coextensive with said first-mentioned portions of said foil and between said foil and said bitumen layer and said portions being coextensive with said bitumen layer.
  • said means causing the first-mentioned portions of said foil to contract and expand difierently than said connecting portions comprises a series of longitudinally extending portions of silicone between said foil and said bitumen layer and nonadhered to said foil, said portions of silicone being substantially coextensive with said first-mentioned portions of said foil.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)
US354324A 1963-04-12 1964-03-24 Reinforced bitumen covering with sheet-metal protection Expired - Lifetime US3503837A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR931444A FR1377293A (fr) 1963-04-12 1963-04-12 Perfectionnement apporté aux chapes de bitume armé autoprotégées par feuille de métal à coefficient de dilatation élevé

Publications (1)

Publication Number Publication Date
US3503837A true US3503837A (en) 1970-03-31

Family

ID=8801600

Family Applications (1)

Application Number Title Priority Date Filing Date
US354324A Expired - Lifetime US3503837A (en) 1963-04-12 1964-03-24 Reinforced bitumen covering with sheet-metal protection

Country Status (6)

Country Link
US (1) US3503837A (nl)
BE (1) BE644412A (nl)
DE (1) DE1484048C3 (nl)
ES (1) ES298762A1 (nl)
FR (1) FR1377293A (nl)
GB (1) GB1032532A (nl)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2139882A (en) * 1937-01-07 1938-12-13 Woodall Industries Inc Floor structure
US2286120A (en) * 1940-06-26 1942-06-09 Robertson Co H H Building material
US2289699A (en) * 1941-03-24 1942-07-14 Hans H Doe Roofing
US2373039A (en) * 1942-01-31 1945-04-03 Acme Steel Co Wall covering
US2732886A (en) * 1956-01-31 Method for producing corrugated roofing material
US2975808A (en) * 1956-12-10 1961-03-21 Lynn Corp Inc Conduit and fabricating material therefor
US2985554A (en) * 1957-08-14 1961-05-23 Avery Adhesive Products Inc Method of rendering a web non-adherent to a pressure-sensitive adhesive and article produced thereby
US3095339A (en) * 1958-03-25 1963-06-25 Lubrizol Corp Asphalt roofing element

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2732886A (en) * 1956-01-31 Method for producing corrugated roofing material
US2139882A (en) * 1937-01-07 1938-12-13 Woodall Industries Inc Floor structure
US2286120A (en) * 1940-06-26 1942-06-09 Robertson Co H H Building material
US2289699A (en) * 1941-03-24 1942-07-14 Hans H Doe Roofing
US2373039A (en) * 1942-01-31 1945-04-03 Acme Steel Co Wall covering
US2975808A (en) * 1956-12-10 1961-03-21 Lynn Corp Inc Conduit and fabricating material therefor
US2985554A (en) * 1957-08-14 1961-05-23 Avery Adhesive Products Inc Method of rendering a web non-adherent to a pressure-sensitive adhesive and article produced thereby
US3095339A (en) * 1958-03-25 1963-06-25 Lubrizol Corp Asphalt roofing element

Also Published As

Publication number Publication date
ES298762A1 (es) 1964-06-01
DE1484048C3 (de) 1974-08-01
DE1484048A1 (de) 1968-12-12
FR1377293A (fr) 1964-11-06
BE644412A (nl) 1964-06-15
DE1484048B2 (de) 1974-01-10
GB1032532A (en) 1966-06-08

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