GB1051822A - - Google Patents

Abstract

1,051,822. Extruding composite strips. MILANI RESINE S.p.A. Nov. 26, 1964 [Dec. 2, 1963], No. 48041/64. Heading B5A. [Also in Divisions E1 and E2] The panels of a collapsible folding leaf of a door or partition &c. are formed of side-by-side joined flexible strip and rigid strip of preferably the same plastics material plasticized to different degrees, by extruding the materials from respective sources to a composite extruder head comprising an inlet head 27 for what will be the rigid plastics material and having an orifice of the required cross-section 28, a part 29 made in two pieces 30, 31, each of which has extension to form a baffle 32 which separates an orifice 34 from the orifice 33. The orifice 34 feeds from the part 29, that material which will be the flexible portion of the panel and the orifice 33 is a continuation of the orifice 28. Orifices 34, 33 feed to corresponding orifices in part 35 which has a semi-circular orifice 37 for the flexible material and two flat portions 36, 38 for the rigid material, a hole for the core 40 surrounded by holes 39 to produce a tubular rigid portion and a hole 41. The materials proceed to part 42, 43 which is in two pieces having cavities to sandwich between them pieces 46 and 53 forming a cavity 48, 49, 50, cavities 48, 50 merging into cavity 49, to join the materials from cavities 36, 38 and that from cavity 37, the cavity 50 terminating in a hole 51 from which issues the tubular member which is integral with the rigid member and formed by the core 40. Cavity 48 terminates in a hole 55 which accommodates the piece 53 to form a forked portion in the end of the rigid member.