Container with double layers made of different materials

Details Container with double layers made of different materials Container with double layers made of different materials

2003-04-30

2004-07-20

Moy, Joseph Man-Fu (Department: 3727)

Receptacles

Receptacle side wall made of two or more layers of material...

Beverage receptacle

C220S062140, C220S062220, C220S663000

Reexamination Certificate

active

06763962

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a container with double layers made of different materials, more particularly one, which is made in such a way that both of the layers can't separate from each other, move relatively to each other or change shape due to significant change of temperature or hit of other objects.
2. Brief Description of the Prior Art
Containers usually have patterns printed or attached on the surface to be attractive. However, patterns on the surface of a container are likely to be damaged or fade if hard objects are rubbed against them or if they are subject to moisture, or after the container has been used for a long period of time.
Referring to
FIG. 5
, a conventional container
10
is comprised of outer and inner layers
11
, and
12
; the outer layer
11
is formed with ornamental through holes
111
with various shapes on the annular portion; the inner layer
12
is disposed in the outer layer
11
so that patterns can be presented by means of the ornamental through holes
111
and the inner layer
12
; the inner layer
12
can be merely closely fitted to the outer layer
11
without use of adhesive or securely joined to the outer layer
11
with adhesive. This container
10
is found to have disadvantages as followings:
1. Adhesive used between the layers
11
,
12
is likely to become loose, causing the layers
11
,
12
to easily separate from each other if the layers are made of different materials to have different coefficients of expansion, and there is significant change of temperature.
2. The layers
11
,
12
are prone to move relatively with respect to each other, and even change shape if the inner layer
12
is merely closely fitted into the outer layer
11
without use of adhesive, and other objects hit the container hard.
3. The through holes
111
of the outer layer
11
make the container uneven on the surface. Consequently, the appearance of the container is badly affected.
Referring to
FIG. 6
, another conventional container
20
is comprised of outer and inner layers
21
, and
22
made of different materials; the outer layer
21
is formed with an injection gate
212
on the bottom, and ornamental through holes
211
with various shapes on the annular portion; the inner layer
22
is made, and the holes
211
are filled with plastic materials for the outer layer
22
by means of positioning the outer layer
21
on a mold, and injecting the plastic materials into the mold via the gate
212
; thus, both the layers
21
,
22
are joined together, and plastics formed in the holes
211
are as high as those portions of the outer layer
21
that surround the through holes
211
, i.e. the container
20
is smooth on the surface thereof. However, this container
20
still has disadvantages as followings:
1. Because the layers
11
,
12
are made of different materials to have different coefficients of expansion, they are prone to separate from each other when there is significant change of temperature.
2. The layers
21
,
22
are prone to move relative to each other, and even change shape when other objects hit the container hard.
3. The injection gate
212
on the bottom of the outer layer
21
will make the whole container take on an unpleasant appearance.
4. The patterns are flat, which are presented by the plastics formed in the through holes
211
in the injection molding for the inner layer
22
.
SUMMARY OF THE INVENTION
It is a main object of the present invention to provide a container with double layers made of different materials, of which both of the layers can't easily separate from each other, move relatively to each other or change shape.
The container of the invention includes a metallic outer layer formed with through holes, and a plastic inner layer formed directly over an inner side of the outer layer by means of injection molding with a mold; the mold is shaped such that three-dimensional projecting portions are formed over corresponding ones of the through holes of the outer layer and project beyond the outer layer in the injection molding, and that edges of the projecting portions mount on those portions of the outer layer that define the through holes.


REFERENCES:
patent: 1715156 (1929-05-01), Witchger
patent: 2236904 (1941-04-01), Hendrickson
patent: 2533578 (1950-12-01), Gomersall
patent: 3217923 (1965-11-01), Price
patent: 3248946 (1966-05-01), Lichtenberg et al.
patent: 4363240 (1982-12-01), Mizusaki
patent: 5275277 (1994-01-01), Gallegos
patent: 3241369 (2001-06-01), Wyzenbeek
patent: 6341712 (2002-01-01), Huang
patent: 6349841 (2002-02-01), Basara

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