Method of bonding spaced sheets by molding resin therebetween
AssigneeMary Frances Theresa Langlands
InventorJames W. Langlands
Life of this patent
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Abstract
A method of producing a bonded laminate by sealing round the edges of a pair of face-to-face spaced sheets of frangible material, introducing into the envelope so formed a liquid resin composition and solidifying the liquid, the seal around the sheets being formed by gas-permeable, resin-impermeable material so that when the resin is introduced the sheets can be sealed completely and trapped air can escape through the seal. This permits very precise control of the amount of resin in the laminate and avoids difficulties involved in the removal of air bubbles.
Claims10
A method of producing a laminate comprising placing a pair of sheets of frangible material in face-to-face relationship, introducing between the sheets a liquid which on solidifying forms a polymer of greater resistance to fracture than the sheets and adheres to the sheets, forming around the periphery of the sheets a continuous tape-like barrier to passage of the liquid thereby to retain the liquid between the sheets, wherein at least part of the barrier is gas-permeable, expelling air from the intersheet space through the barrier so as to cause the liquid to fill the intersheet space, and solidifying the liquid to form a bonded laminate.
A method of producing a laminate comprising placing a pair of sheets of frangible material in spaced face-to-face relationship, sealing the sheets together around pair of their periphery to form an envelope, tilting the envelope so that the unsealed portion of the sheets is uppermost, introducing into the envelope through the unsealed portion a measured quantity of a liquid which on solidifying forms a polymer of greater resistance to fracture than the sheets and adheres to the sheets, sealing the unsealed portion to form around the periphery of the sheets a continuous tape-like barrier to passage of the liquid, at least an upper portion of the barrier being permeable to air, allowing air to escape from the envelope through the barrier so as to cause the liquid to fill the intersheet space and solidifying the liquid to form a bonded laminate.
Dependencies are inferred from the claim text.