Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having voids in a component
Patent
1988-01-13
1988-12-20
Cannon, James C.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Composite having voids in a component
350641, 4283193, 428339, B32B 326
Patent
active
047924829
ABSTRACT:
In a method of bonding a mirror to a rigid backing by means of a solvent-based adhesive, the solvent vapour from the bond line is extracted by interposing a porous layer between the mirror and the backing and extracting the solvent vapour through the porous layer by suction.
Apparatus for this purpose includes first and second work stations 2,4 for supporting a rigid sheet of material 8, and means 39,40,44,46,56 for advancing the sheet from one station to the other through a third station equipped with means 34 for dispensing liquid adhesive on the sheet as it passes through. The support surface 16 of the second station is gas-permeable 18 and this station also includes a flexible and substantially gas-impermeable lid 22 adapted to close over a sheet lying on the support surface and means 21 for sucking gas through the support surface from the space between the lid and the support surface whereby to evacuate the space.
Also provided is a laminate of a mirror and a rigid backing with a porous layer of fibrous material between the mirror and the backing, and a method of bonding a mirror to a rigid backing by means of a foam-forming composition which expands and sets to form a solid foam which bonds the mirror to the backing.
REFERENCES:
patent: 4726860 (1988-02-01), Leach
Cannon James C.
Chelsea Artisans Limited
Collins Bruce M.
Long William C.
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