Patent ID: 8627868

Claim:
Apparatus for making pre-shaped insulating sheets comprising: shaping elements adapted for producing, starting from a continuous strip made of electrically insulating material having a flat or substantially flat cross section, a strip portion having a cross section comprising a central septum and two lateral portions joined to a respective end portion of the central septum, each of the lateral portions comprising a first section joined to the central septum, a second section joined and perpendicular, or essentially perpendicular, to the first section, a third section joined to the second section and inclined with respect to the latter towards the central septum; a pair of opposite rollers each having a transverse shaping profile comprising a projecting appendage adapted to be interfaced with a respective portion of the strip facing the central septum and adapted to be operatively interposed between the central septum and the third inclined section when the strip passes between the pair of opposite rollers in a configuration of said strip in which said third section joined to the second section is inclined with respect to the latter towards the central septum.