Method of fabricating crosslinked thermoplastics articles
AssigneeShaw Pipe Industries Ltd.
InventorHarold F. Jarvis
Life of this patent
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Abstract
Cross-linked thermoplastics articles are fabricated by providing a radiant energy-crosslinkable thermoplastics sheet, masking areas of the sheet, exposing the masked sheet to appropriate radiant energy, fusing the masked and relatively uncrosslinked areas together under heat and pressure, and locally applying crosslink inducing energy to the fused portions.
Claims7
A method of fabricating crosslinked synthetic plastics articles comprising providing crosslinkable synthetic thermoplastics material in sheet form, crosslinking areas of the sheets to a controlled degree of crosslinking by exposing them to crosslink-inducing radiant energy while providing relatively uncrosslinked portions thereon by masking selected areas of the sheets with masking material relatively opaque to the radient energy, shaping the crosslinked sheets into a more complex configuration and bringing relatively uncrosslinked portions of the sheets into contact, fusing the contacted portions together under heat and pressure, and locally applying crosslink-inducing energy to the fused portions.
Dependencies are inferred from the claim text.