Novel window and patio door frame members are formed by an extrusion process that provide these members with at least one channel and with an outer weather resistant surface and an internal imitation wood surface together with integrated sealing strips formed in the channels for the doors, these components...http://www.google.es/patents/US6893594?utm_source=gb-gplus-sharePatente US6893594 - Extruded window and door composite frames
