US 12,318,980 B2
Method of manufacturing an outer shell of a dispenser part
Zbigniew Jan Kuczynski, Bialystok (PL); and Helio Marto Jose, Marihna Grande (PT)
Assigned to ESSITY HYGIENE AND HEALTH AKTIEBOLAG, Gothenburg (SE)
Filed by Essity Hygiene and Health Aktiebolag, Gothenburg (SE)
Filed on Oct. 25, 2023, as Appl. No. 18/494,137.
Application 18/494,137 is a division of application No. 16/629,807, granted, now 11,878,450, previously published as PCT/EP2018/067122, filed on Jun. 26, 2018.
Claims priority of application No. 17181157 (EP), filed on Jul. 13, 2017.
Prior Publication US 2024/0140008 A1, May 2, 2024
Int. Cl. B29C 45/16 (2006.01); B65D 83/00 (2006.01); A47K 5/12 (2006.01); A47K 10/32 (2006.01); B29C 45/14 (2006.01); B29K 55/02 (2006.01)
CPC B29C 45/1657 (2013.01) [B65D 83/00 (2013.01); A47K 5/12 (2013.01); A47K 10/32 (2013.01); A47K 2010/3233 (2013.01); B29C 2045/14122 (2013.01); B29C 2045/14131 (2013.01); B29C 2045/1682 (2013.01); B29K 2055/02 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method of manufacturing an outer shell of a dispenser part, the method comprising:
performing a first injection moulding step to produce a first component part of the outer shell in a mould, wherein the first component part comprises an outer surface and an inner surface, wherein the first component part has a first mating surface directed to the outer surface of the first component part, the first mating surface including at least one step extending between the outer surface and the inner surface of the first component part;
performing a second injection moulding step to produce a second component part in the mould, wherein the second component part comprises an outer surface and an inner surface, wherein the second component part has a second mating surface directed to an inner surface of the second component part, wherein the first component part and the second component part are joined to each other along a seam by mating the first mating surface and the second mating surface during the second injection moulding step; and
retaining the first component part in the mould and engaging a plurality of protrusions provided on a surface of the mould via a plurality of recesses formed in the first component part during the second injection moulding step, the plurality of recesses being formed at the inner surface of the first component part along at least a part of an inner end of the first mating surface of the first component part and/or on a gate protrusion extending away from a free end of the first mating surface of the first component part; and
wherein the plurality of protrusions are provided with an undercut.