Bonding sheet materials together

B - Operations – Transporting – 29 – C

Patent

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154/29, 154/39,

B29C 65/02 (2006.01) B29C 65/14 (2006.01) B29C 65/34 (2006.01) B32B 38/00 (2006.01) C09J 5/06 (2006.01) B29C 35/02 (2006.01) B29C 35/08 (2006.01) B29C 59/14 (2006.01) B29C 65/48 (2006.01)

Patent

CA 2011249

Sheets of materials (12,13,27,28) are bonded together by placing them into intimate contact, bringing them into a single composite assembly, such as a roll (14,30) and heating the assembly until at least one of the sheets reaches a temperature at which it will adhere to the adjacent sheet. If required, a powdered bonding agent may be applied to one sheet surface from a fluidised bed (20) of the bonding agent. Where one sheet is metal, the heat can be generated by passing an electric current through the metal. The electrical resistance of the metal sheet can be used as a measure of the sheet temperature.

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