US 12,225,997 B2
Process for producing lipsticks with special tridimensional surface effects and lipsticks obtained by such process
Giuseppe Lattanzi, Misinto (IT); and Fabio Leone, Casirate D'Adda (IT)
Assigned to INTERCOS S.p.A., Milan (IT)
Appl. No. 17/259,295
Filed by INTERCOS S.p.A., Milan (IT)
PCT Filed Jan. 31, 2019, PCT No. PCT/IB2019/050793
§ 371(c)(1), (2) Date Jan. 11, 2021,
PCT Pub. No. WO2020/012250, PCT Pub. Date Jan. 16, 2020.
Claims priority of application No. 102018000007184 (IT), filed on Jul. 13, 2018.
Prior Publication US 2021/0251367 A1, Aug. 19, 2021
Int. Cl. A45D 40/16 (2006.01); B29C 33/38 (2006.01); A45D 40/00 (2006.01); B29C 33/76 (2006.01)
CPC A45D 40/16 (2013.01) [B29C 33/3842 (2013.01); A45D 2040/0012 (2013.01); A45D 2040/0025 (2013.01); B29C 33/76 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A process for production of a lipstick having a tridimensional surface effect, comprising the following succession of steps:
a) providing a metallic tap (1) with a head part (2) that is in a shape of a lipstick, the head part (2) having an external lateral surface;
b) mirror-like polishing the external lateral surface of the head part (2) of the metallic tap (1) to obtain a head part with a polished external lateral surface (5);
c) laser working the polished external lateral surface (5) of the head part (2) to obtain a tap with laser-worked head part (6) worked according to the tridimensional surface effect;
d) introducing the metallic tap (1) with laser-worked head part (6) into an internal cavity (7) of a molding machine (8) to form a molding space (11) between the metallic tap (1) and the internal cavity (7);
e) forming by molding, inside the molding space (11), a hollow ogive (9) of a malleable plastic material with an internal cavity (10) shaped in a complementary way with respect to the tridimensional surface effect;
f) introducing the hollow ogive (9) with the internal cavity (10) looking upwards into a pouring space formed by a U-shaped internal cavity of the same or a further molding machine, the U-shaped internal cavity having a shape complementary with an external shape of the hollow ogive (9);
g) pouring a fluid material (12) adapted for a lipstick into the internal cavity (10) of the hollow ogive (9);
h) cooling the poured fluid material (12) to obtain a solidified lipstick (13) with a lateral surface having the tridimensional surface effect;
i) drawing the solidified lipstick (13) from the internal cavity (10) of the hollow ogive (11); and
j) covering the solidified lipstick (13) with pearls by means of a cyclone system.