Preform assembly, double container, and method of manufacturing double container
AssigneeYoshino Kogyosho Co., Ltd.
InventorsTakanori Suzuki, Osamu Jono
Life of this patent
Estimating the term…
Abstract
A preform assembly includes: an outer preform that includes an outer mouth portion and a stretch portion connected to the outer mouth portion and in which a recess extending in a vertical direction is provided on an inner surface of the stretch portion; and an inner preform that includes an inner mouth portion and a stretch portion connected to the inner mouth portion, wherein an outside air introduction port communicating with a part between the outer preform and the inner preform is provided in a mouth portion composed of the outer mouth portion and the inner mouth portion located on an inner side of the outer mouth portion.
Claims2
A preform assembly comprising:
- an outer preform that includes a tubular outer mouth portion and a stretch portion connected to the outer mouth portion and in which a recess or ridge extending in a vertical direction is provided on an inner surface of the stretch portion;
- and
- an inner preform that includes a tubular inner mouth portion and a stretch portion connected to the inner mouth portion, wherein:
- an outside air introduction port communicating with a part between the outer preform and the inner preform is provided in a mouth portion composed of the outer mouth portion and the inner mouth portion located on an inner side of the outer mouth portion,
- the stretch portion in the outer preform has a diameter decrease portion in which an inner diameter gradually decreases downward from the outer mouth portion, and
- the recess or ridge is provided in the diameter decrease portion.
Dependencies are inferred from the claim text.