US 12,030,070 B2
Elastic element for a device for dispensing fluids or mixtures and method and mould for making said elastic element
Evans Santagiuliana, Vicenza (IT)
Assigned to TAPLAST S.R.L., (IT)
Filed by TAPLAST S.R.L., Povolaro (IT)
Filed on Nov. 1, 2021, as Appl. No. 17/516,052.
Application 17/516,052 is a continuation of application No. 15/528,324, abandoned, previously published as PCT/IB2015/058915, filed on Nov. 18, 2015.
Claims priority of application No. VI2014A000301 (IT), filed on Nov. 20, 2014.
Prior Publication US 2022/0055053 A1, Feb. 24, 2022
Int. Cl. B05B 11/10 (2023.01); B29C 33/44 (2006.01); B29C 45/26 (2006.01); B29C 45/40 (2006.01); B29C 45/44 (2006.01); B29K 23/00 (2006.01); B29L 23/00 (2006.01)
CPC B05B 11/1077 (2023.01) [B05B 11/1001 (2023.01); B05B 11/1023 (2023.01); B05B 11/1074 (2023.01); B29C 45/2602 (2013.01); B29C 45/262 (2013.01); B29C 45/2681 (2013.01); B29C 45/44 (2013.01); B05B 11/1067 (2023.01); B29C 33/446 (2013.01); B29C 2045/4078 (2013.01); B29K 2023/06 (2013.01); B29K 2023/12 (2013.01); B29K 2995/0046 (2013.01); B29L 2023/00 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A method for an injection molding an elastic element having a resilient, compressible tubular body with a spiral-shaped pattern extending in a longitudinal direction along an axis of the main tubular body, said method comprising the following steps:
providing a mold suitable for injection molding comprising a hollow die having a fixed support and one or more movable dies and inserting a male punch along a longitudinal axis into said die in such a way as to define an interspace in a shape corresponding to that of an elastic element between said hollow die and said male punch, wherein the elastic element includes a plurality of first projections perpendicular to the longitudinal axis at one end of the elastic element and a plurality of second projections parallel to the longitudinal axis at an opposing end of the elastic element;
injecting plastic material in a pasty state into said interspace; and
removing said male punch by rotating the punch about the longitudinal axis,
wherein during rotation of said punch at least one of said first projections and said second projections of said elastic element becomes engaged in a corresponding seat created in the fixed support, so that said elastic element cannot be rotated by said punch.