US 11,865,742 B2
Preform and mold stack
Christophe Simon Pierre Beck, Terville (FR); and Sebastian Rasche, Trier (DE)
Assigned to HUSKY INJECTION MOLDING SYSTEMS LTD., Bolton (CA)
Appl. No. 17/059,035
Filed by HUSKY INJECTION MOLDING SYSTEMS LTD., Bolton (CA)
PCT Filed Jun. 14, 2019, PCT No. PCT/CA2019/050842
§ 371(c)(1), (2) Date Nov. 25, 2020,
PCT Pub. No. WO2020/006624, PCT Pub. Date Jan. 9, 2020.
Claims priority of provisional application 62/693,491, filed on Jul. 3, 2018.
Prior Publication US 2021/0213659 A1, Jul. 15, 2021
Int. Cl. B29C 45/26 (2006.01); B29C 45/27 (2006.01); B29C 49/06 (2006.01); B29L 31/00 (2006.01)
CPC B29C 45/261 (2013.01) [B29C 45/2711 (2013.01); B29C 49/06 (2013.01); B29C 2949/0724 (2022.05); B29C 2949/0856 (2022.05); B29L 2031/7158 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A preform suitable for subsequent blow molding, the preform comprising:
a neck, a base and a body extending therebetween, the neck, the body and the base each having inner and outer faces defining a wall thickness therebetween,
the base having an elliptical inner face with a first flat circular bottom portion, and an elliptical outer face with a second flat circular bottom portion, and
the first and second flat circular bottom portions each having a center on a vertical center axis of the preform and a radius R of equal size.