Patent ID: 6591942
Filing Date: 2003-07-15
Classification: B29C,B29D,B29K,B29L,E06C

Abstract:
A process for manufacturing ladders comprising the following steps:arranging a plurality of rungs (2) fully made of a predetermined plastic material and each having at least one coupling portion (2c); arranging at least one primary upright length (3) made of a material comprising a plurality of reinforcing fibers (3a) associated with a binding resin (3b); mechanically linking the coupling portions (2c) of the rungs (2) to corresponding engagement regions (3c) provided on the primary upright length (3) by bringing said binding resin (3b) to a fluid phase at least close to said corresponding engagement regions (3c), said linking step comprising a sub-step of melting by heating and mixing the predetermined plastic material of the rung (2) with the binding resin (3b) of the primary upright length (3), the binding resin (3b) forming the upright length (3) and the predetermined plastic material forming the rungs (2) being directly employed as cohesive agents and cooperatively defining, during said linking step, a randomly-shaped agglomerate directly connecting the rung (2) and the upright length (3).