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US 5,490,602 AGranted
Composite structure manufacture
AssigneeShort Brothers PLC
InventorsRobert S. Wilson, Mark A. Braniff
Life of this patent
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AssigneeShort Brothers PLC
InventorsRobert S. Wilson, Mark A. Braniff
Estimating the term…
A filament reinforced perforate composite sheet is manufactured by forming a filament assembly which includes reinforcing filament structures and passage forming filament structures and in which the passage forming filament structures extend from the front face to the rear face of the assembly, applying a matrix material to the assembly to form a composite sheet in which the passage forming filament structures extend from the front face to the rear face of the sheet and removing the passage forming filament structures or a part or parts thereof to produce a multiplicity of passages extending through the composite sheet. The passage forming filament structures may be continuous monofilaments which may be hollow, an assembly of continuous filaments in the form of a tow or twisted together or a yarn spun from short fibers and the material from which they are made is so selected that they can be melted or dissolved out of the sheet or withdrawn in their original state or parts of the hollow monofilaments removed to form the passages through the sheet.
A method of manufacturing a multi-ply fabric reinforced perforate composite sheet in which the front face of the composite sheet is presented by one ply of the fabric and the rear face is presented by another ply of the fabric comprising the steps of forming a multi-ply fabric assembly which includes reinforcing filament structures and passage forming filament structures and in which the passage forming filament structures extend from the front face of the assembly to the rear face of the assembly, applying a matrix material to the assembly to form a multi-ply fabric reinforced composite sheet in which the front face of the composite sheet is presented by one ply of the fabric and the rear face is presented by another ply of the fabric and in which the passage forming filament structures extend from the front face of the sheet to the rear face of the sheet and removing the passage forming filament structure or a part or parts thereof thereby to produce a multiplicity of passages extending through the multi-ply fabric reinforced composite sheet from the front face of the sheet to the rear face of the sheet.
A method of manufacturing a yarn reinforced perforate composite sheet comprising the steps of forming a yarn assembly which includes reinforcing yarn structures and passage forming monofilament yarn structures and in which the passage forming monofilament yarn structures extend from the front face of the assembly to the rear face of the assembly, applying a matrix material to the assembly to form a composite sheet in which the passage forming monofilament yarn structures extend from the front face of the sheet to the rear face of the sheet and removing the passage forming monofilament yarn structures or a part or parts thereof thereby to produce a multiplicity of passages which extend through the composite sheet from the front face of the sheet to the rear face of the sheet.
Dependencies are inferred from the claim text.