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.
Claims7
A double container comprising:
- an outer layer body that includes a tubular outer mouth portion and a bottomed tubular barrel portion connected to the outer mouth portion via a shoulder portion and in which a thin wall portion extending in a vertical direction is provided in the shoulder portion;
- and
- an inner layer body that includes a tubular inner mouth portion and a volume-reduction deformable containing portion connected to the inner mouth portion and separably laminated on an inner surface of each of the shoulder portion and the barrel portion,
- wherein an outside air introduction port communicating with a part between the outer layer body and the inner layer body 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, and
- wherein the thin wall portion is formed by a depression provided on the inner surface of the shoulder portion as a recess so as to reduce a thickness of the shoulder portion and having, in a top view, an approximately triangular shape that increases in circumferential width in a radially outward direction.
Dependencies are inferred from the claim text.