US 5,511,663 AGranted

Packaging case having improved sidewall structure

AssigneeKureha Kagaku Kogyo Kabushiki Kaisha

InventorsNoboru Shimura, Tamotsu Aiba, Takashi Nakamura, Teruyoshi Sukegawa

Life of this patent

Estimating the term…

Loading patent…

Abstract

A packaging case includes a case body for storing a wrap film and a lid continuously formed with the top edge portion of a rear wall of the case body. Flap pieces extend outward to be pivotal on the top edge portions of side walls of the case body. Stepped portions engaged with the flap pieces to prevent floating of the lid are formed on the inner surfaces of lid side walls covered on the side walls of the main body during closing of the lid. Predetermined portions of the side walls of the main body continuous with the flap pieces are made thinner than remaining portions of the side walls. The inner surfaces of the remaining portions are located inside the inner surfaces of the predetermined portions.

Claims46

Dependent claims

A packaging case comprising:

a case body having a substantially rectangular bottom wall, side walls respectively continuously formed with one pair of opposing edge portions of said bottom wall, and front and rear walls respectively continuously formed with the other pair of opposing edge portions of said bottom wall and extending between said side walls, said case body being adapted to store an object;
and
a lid having a substantially rectangular top wall continuously and pivotally formed with a top edge portion of said rear wall so as to cover and close an opening portion of said case body which is defined by top edge portions of said side walls, said front wall and said rear wall, lid side walls respectively continuously formed with a pair of edge portions adjacent to an edge portion of said top wall serving as a pivot center, and located outside said side walls of said case body upon closing said opening portion with said top wall, and a lid front wall continuously formed with an edge portion of said top wall which opposes said edge portion serving as the pivot center, extending between said lid side walls, and located outside said front wall of said case body upon closing said opening portion with said top wall,
wherein outwardly extending flap pieces are continuously and pivotally formed on the top edge portions of said side walls of said case body, stepped portions are formed on inner surfaces of said lid side walls to engage with said flap pieces upon closing said opening portion with said top wall so as no prevent said lid from floating;
and a thickness of a predetermined portion of each side wall of said case body which faces to a corresponding one of said flap pieces is set smaller than that of a remaining portion of said each side wall such that an inner surface of said remaining portion is located more inside of said case body than an inner surface of said predetermined portion.

2 more elements

A packaging case comprising:

a case body having a substantially rectangular bottom wall, side walls respectively continuously formed with one pair of opposing edge portions of said bottom wall, and front and rear walls respectively continuously formed with the other pair of opposing edge portions of said bottom wall and extending between said side walls, said case body being adapted to store an object;
and
a lid having a substantially rectangular top wall continuously and pivotally formed with a top edge portion of said rear wall so as to cover and close an opening portion of said case body which is defined by top edge portions of said side walls, said front wall and said rear wall, lid side walls respectively continuously formed with a pair of edge portions adjacent to an edge portion of said top wall serving as a pivot center and located outside said side walls of said case body upon closing said opening portion with said top wall, and a lid front wall continuously formed with an edge portion of said top wall which opposes said edge portion serving as the pivot center, extending between said lid side walls, and located outside said front wall of said case body upon closing said opening portion with said top wall,
wherein outwardly extending flap pieces are continuously and pivotally formed on top edge portions of said side walls of said case body, stepped portions are formed on inner surfaces of said lid side walls to engage with said flap pieces upon closing said opening portion with said top wall so as to prevent said lid from floating, and front end portions of said flap pieces located on a front surface side of said case body are spaced apart from an outer surface of said front wall by a predetermined first distance.

1 more element

Dependencies are inferred from the claim text.