Method of applying heat insulating material to sheet metal
AssigneeHeatshield Research and Development Pty., Ltd.
InventorJohn Ian Menzies
Life of this patent
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Abstract
Metal foil is applied to sheet metal by a film of polythene adhering to both and separating the two from direct contact, for improving the heat-insulating qualities of the sheet metal, by superimposing the film on the sheet metal, superimposing the foil on said film, and drawing the laminated assembly under tension along a convex curved surface, said foil next to said surface, and simultaneously heating said sheet metal to heat, by conduction, said film, heat and pressure on said foil causing it to bond to said foil and said film.
Claims8
A method of bonding metal foil to sheet metal by an interposed film of polythene which is adhered to both and which separates the sheet metal and metal foil from direct contact, comprising the steps of:
- a. drawing said sheet metal from a roll,
- b. separately drawing said film and superimposing said film on said moving sheet metal,
- c. separately drawing said foil and superimposing said foil on said film,
- d. suspending said laminate between longitudinally spaced rollers,
- e. applying weight and pressure to the laminated assembly of foil, film and sheet metal while in tension and so suspended by contacting and covering said laminate with a plurality of spaced weights which apply pressure by virtue of such weight to said laminate, and
- f. applying heat to the underside of said sheet metal at least in the area below said weights, such heat melting said film and causing bonding of said film to said foil and said sheet metal due to the pressure applied to the laminate by said weights and the tension on the laminate.
Dependencies are inferred from the claim text.