Abstract: A laminating device includes two pressure rollers pressed toward each other and together defining a pinch and a first feed mechanism for guiding to the pinch a strip of a flexible first substrate provided with a thermally-activated glue layer. The first feed mechanism includes a first heater for heating the first substrate with the glue layer. The laminating device also includes a second feed mechanism for guiding a flexible second substrate to the pinch such that this second substrate and the glue layer are pressed against each other by the pressure rollers. The laminating device also includes a second heater placed in the zone of the pinch upstream thereof for heating the first substrate with the glue layer heated by the first heater and the second substrate immediately prior to the joining together thereof in the pinch, such that a laminate is formed including two substrates mutually connected by the glue layer.