Self-opening can

Details Self-opening can Self-opening can

2000-11-07

2002-08-06

Newhouse, Nathan J. (Department: 3727)

Receptacles

Closures

With closure opening arrangements for means

C220S359200, C220S359400, C220S254100

Reexamination Certificate

active

06427862

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a self-opening can, more particularly to a self-opening can with an enhanced sealing effect.
2. Description of the Related Art
Referring to
FIG. 1
, a conventional self-opening can is shown to include a container
1
which has a longitudinal wall
10
with an edge
101
confining an opening
11
. A rim member
12
has an outer peripheral portion
121
which is sealingly joined to the edge
101
, and an inner peripheral portion
122
which extends inwardly of the outer peripheral portion
121
. A plastic cover member
2
includes a peripheral wall with a groove
21
which extends therein and in which the inner peripheral portion
122
is inserted securely, and a cover panel
22
which closes the opening
11
. A separable weakened seam
221
is formed between the peripheral wall and the cover panel
22
. An opening tab
222
is connected to the cover panel
22
adjacent to the seam
221
such that the cover panel
22
can be broken from the seam
221
by pulling the opening tab
222
. However, when the formation of the groove
21
and the inner peripheral portion
122
is not precise, the sealing effect between the rim member
12
and the cover member
2
will be adversely affected.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a self-opening can which has an enhanced sealing effect.
According to this invention, the self-opening can includes a container which has a receiving space and a longitudinal wall surrounding the receiving space. The longitudinal wall has an edge which extends around one end of the receiving space. A rim member has an outer peripheral portion which is sealingly joined to the edge, and an inner peripheral portion which extends inwardly of the outer peripheral portion and which confines an opening for access to the receiving space. The inner peripheral portion has a groove which extends around the opening. A filler of non-metallic plastic material fills the groove and is exposed from the groove. A cover panel closes the opening and extends to the inner peripheral portion of the rim member. The cover panel has a layer of non-metallic plastic material which is connected sealingly to the filler.


REFERENCES:
patent: 4363582 (1982-12-01), Bloeck et al.
patent: 4756443 (1988-07-01), Murayama
patent: 4988013 (1991-01-01), Kobayashi et al.
patent: 5069355 (1991-12-01), Matuszak
patent: 5353943 (1994-10-01), Hayward
patent: 5395005 (1995-03-01), Yoshida
patent: 5725120 (1998-03-01), Ramsey et al.
patent: 6036043 (2000-03-01), Erfgen et al.
patent: 6145689 (2000-11-01), Kobayashi et al.

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