Envelopes – wrappers – and paperboard boxes – Paperboard box – Cylindrical or conical body – or wall structure
Reexamination Certificate
1999-06-15
2001-08-07
Shoap, Allan N. (Department: 3727)
Envelopes, wrappers, and paperboard boxes
Paperboard box
Cylindrical or conical body, or wall structure
C229S005500, C229S406000, C229S400000, C426S115000, C206S815000
Reexamination Certificate
active
06270003
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a cake container, and more specifically, to a cake container for forming and maintaining cake batter that is heated to expand in a predetermined configuration.
Conventional cup-like containers formed by bending sheet material such as paper are known for holding poundcake and the like. For example, as shown in
FIG. 12
, a container body
20
comprises a bottom
21
corresponding to the bottom of a cake and a sidewall
22
protruding from the periphery of the bottom
21
. The container body
20
consists of a sheet of material, which is shaped like a cup by press working. A fold
23
is defined on the surface of the material. The bottom
21
and the sidewall
22
are separated by the fold
23
. Inner folds
24
and outer folds
25
are defined in the sidewall
22
. The sidewall
22
is divided into a plurality of panels
26
a
-
26
c
by the folds
24
,
25
.
Typically, aluminum foil is used as material for such a container. In this case, once the material is bent at the inner folds
24
and the outer folds
25
, the folds are easy to form. Thus, the folds
24
,
25
do not easily unfold, and the configuration of the sidewall
22
in the container body
20
is maintained.
If the material is made of synthetic resin, paper or the like, a restoring force that restores the material to its original flat shape is applied to the inner folds
24
and the outer folds
25
when the material is bent by press working. This leads to a problem in that the sidewall
22
loses its shape, and the intended configuration of the sidewall
22
cannot be properly maintained.
The bottom
21
and the side wall
22
form a relatively sharp corner. When manufacturing cakes, a cake in the container body
20
is moved from one step to a subsequent step by conveyers. When the container body
20
is passed from one conveyer to another, the side wall
22
and the bottom
21
are likely to be dented. The resultant cake may therefore be deformed. Further, the sharp corner about the bottom
21
causes the cooked cake to have overcooked or burnt portion about its bottom, which degrades the taste of the cake.
Accordingly, it is an object of the present invention to provide a container in which the configuration of the sidewall in the container body is maintained by making the folds defined on the sidewall resist unfolding.
SUMMARY OF THE INVENTION
To achieve these objects, an improvement of a cup-like container for holding a cake is provided. The container is formed by bending a sheet material and has a bottom and a sidewall, which are associated with the bottom surface and the side surface of the cake, respectively. The sidewall has folds and panels, which are defined by the folds, to form the container into a cup shape. Each panel has a step portion, which is transverse to the fold to hold the sidewall substantially upright.
More specifically, in a cake container according to the present invention, a bottom fold is defined on the surface of a sheet of material to be press-worked. The surface of the material is divided by the first fold into a bottom panel, which corresponds to the bottom of cake, and a sidewall. Second folds are formed in the sidewall. The sidewall is divided into a plurality of panels by these second folds. Furthermore, a step intersecting the second folds is formed in the sidewall to maintain the configuration of the sidewall. The folds are prevented from unfolding by the step. Further, the cake container according to the present invention has a curved transitional wall defined between the bottom panel and the sidewall. The transitional wall has a predetermined radius of curvature in a vertical cross sectional plane.
Other aspects and advantages of the invention will become apparent from the following description, taken in conjunction with the accompanying drawings, illustrating by way of example the principles of the invention.
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Hirano Shiki Co., Ltd.
Mai Tri M.
Sheridan Ross PC
Shoap Allan N.
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