Functional laminate warp elimination method
AssigneeAssa Abloy AB
InventorJohn Weber
Life of this patent
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Abstract
The present invention relates to a method and a device for rapidly stress relieving laminated RFID cards sheets (1) or individually cut cards (2) so that the effect of card wrap, bending and distortion is reduced. A freezer tunnel (5) is located down-stream of a laminator machine. The freezer tunnel (5) uses nozzles (8) to supply a cryogenic liquid in vaporized form. Laminated RFID card sheets (1) are transported through the freezer tunnel (5), where they are exposed to an ambient temperature between −40° C. to −100° C. during two minutes or less.
Claims20
A method for manufacturing a functional laminate formed by a plurality of layers which are laminated together by use of heat and pressure and by at least one partially embedded functional element, characterized in that following a lamination step, the functional laminate is flash frozen by freezing means.
A method for manufacturing a functional laminate, wherein the functional laminate is formed by a plurality of layers laminated together by use of heat and pressure and by at least one partially embedded functional element, comprising, following a lamination step, subjecting the functional laminate to flash freezing in a freezer tunnel for about a couple of minutes.
Dependencies are inferred from the claim text.