Package making – Methods – Closing package or filled receptacle
Reexamination Certificate
1999-10-19
2001-07-17
Kim, Eugene (Department: 3721)
Package making
Methods
Closing package or filled receptacle
C053S374200
Reexamination Certificate
active
06260333
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to a new and improved container bottom sealing device, such as a pressure pad, for securely sealing a multi-layer folded container bottom of a thermoplastic coated paperboard container to prevent leakage of the contents, contained within the formed container, as well as to prevent contamination of contents by any external source or the surrounding environment.
BACKGROUND OF THE INVENTION
Thermoplastic coated paperboard containers are commonly utilized for storage and retention of different materials, including liquids such as milk, juice and creams, as well as solids, gels and other known materials which can be effectively stored for a period of time, e.g. a few days to a few weeks or so, in this type of container. Such thermoplastic coated cartons are generally formed in the manner of a gabled container and have been used for several decades to contain all types of fluids, solids, powders, and other materials with reasonable success. One drawback, however, with the use of such cartons is the quality and adequacy of the seams and seals along which the paperboard is cut and folded to form the resulting container. In particular, it is the bottom surface of such containers where the contents of the container are in almost continuous and constant contact with the formed seams, folds and exposed edges of the paperboard which causes failure in the integrity of the container bottom.
A gable carton is typically formed from a single blank of paperboard material with an array of score lines about which the paperboard material is folded to form the resulting carton. With reference to
FIG. 1
, a typical blank for a prior art half gallon gable carton is identified generally by the numeral
10
. The prior art blank
10
includes first through fourth rectangular side wall panels
12
,
14
,
16
, and
18
and a side glue panel
20
which are consecutively articulated to one another along parallel fold lines
13
,
15
,
17
and
19
, respectively. The first side wall panel
12
is further defined by a raw edge
11
of paperboard material which extends parallel to the fold line
13
. A first bottom fold line
21
and a first top fold line
22
extend between the raw edge
11
and fold line
13
.
A first bottom panel
23
is articulated to the first side panel
12
, of the prior art blank
10
, along the first bottom fold line
21
. The first bottom panel
23
is further defined by a side raw edge
24
which extends generally collinearly from the raw edge
11
. The first bottom panel
23
is further defined by a fold line
25
which extends collinearly from the fold line
13
and by a bottom raw edge
26
which extends between the side raw edge
24
and the fold line
25
. The bottom raw edge
26
typically will be disposed at an interior most location on the gable carton formed from the prior art blank
10
.
A first top panel
28
is articulated to the first side panel
12
along the first top fold line
22
. The first top panel
28
is further defined by a side raw edge
29
which extends collinearly from the raw edge
11
and by a fold line
30
which extends collinearly from the fold line
13
. A fold line
31
extends between the side raw edge
29
and the fold line
30
to define the first top panel
28
. A first top seal panel
33
is articulated to the rectangular first top panel
28
along fold line
31
. A diagonal fold line extends from the intersection of fold lines
30
and
22
to a central region of fold line
31
.
The second side panel
14
is further defined by a second bottom fold line
41
and a second top fold line
42
. A second bottom panel
43
is articulated to the second side panel
14
along the second bottom fold line
41
. The second bottom panel
43
is further defined by two converging fold lines
44
,
45
. A first triangular web panel
46
is articulated to the second bottom panel
43
, along the fold line
44
, and is articulated to the first bottom panel
23
along the fold line
25
. The first triangular web panel
46
is further defined by a raw edge
47
which extends between the fold lines
25
,
44
. A second triangular web panel
48
is similarly articulated to the second bottom panel
43
along fold line
45
. The second triangular web panel
48
is defined further by a fold line
49
which extends collinearly from the fold line
15
and by fold line
45
and raw edge
50
.
A second top panel
51
is articulated to the second side panel
14
along the second top fold line
42
. The second top panel
51
is defined further by converging fold lines
52
and
53
. First and second triangular web panels
54
,
55
are articulated to the second top panel
51
along fold lines
52
and
53
, respectively. The first triangular web panel
54
is further articulated to the first top panel
28
, along fold line
30
, and is defined further by fold line
56
. The triangular web panel
55
is similarly defined further by fold line
57
which extends collinearly from the fold line
15
and by fold line
58
which extends collinearly from the fold line
56
. Top seal panels
59
and
60
are articulated to the web panels
54
and
55
, respectively, along the fold lines
56
and
58
.
The third side panel
16
of the prior art blank
10
is further defined by a third bottom fold line
61
and a third top fold line
62
. A third bottom panel
63
is articulated to the third side panel
16
along the third bottom fold line
61
. The third bottom panel
63
is articulated to the second triangular bottom web panel
48
along fold line
49
and is defined further by side raw edge
65
which extends collinearly from the fold line
49
and generally orthogonal to the raw edge
50
of the bottom web panel
48
; a transverse raw edge
66
which extends orthogonally from the side raw edge
65
a major distance across the third bottom panel
63
; and, a diagonal raw edge
67
which extends between the bottom raw edge
66
and a fold line
64
. As will be explained below in further detail, the third bottom panel
63
defines an external wall of the gable carton erected from the prior art blank
10
, and the raw edges
65
,
66
and
67
of the third bottom panel
63
are substantially exposed on exterior regions of the carton.
A generally rectangular third top panel
68
is articulated to the third side panel
16
along fold line
62
. The third top panel
68
is articulated to the top second triangular web panel
55
along fold line
57
and is defined further by fold line
69
which extends collinearly from the fold line
17
and by fold line
70
which extends parallel to fold line
62
, between the fold lines
57
and
69
. A second top seal panel
72
is articulated to the third top panel
68
along fold line
70
. A diagonal fold line extends from the intersection of fold lines
57
and
62
to a central region of fold line
70
.
The fourth side panel
18
of the prior art blank
10
is defined further by a fourth bottom fold line
73
and a fourth top fold line
74
which extend orthogonally between the fold lines
17
and
19
. A fourth bottom panel
75
is articulated to the fourth side panel
18
along fold line
73
. The fourth bottom panel
75
is further defined by converging fold lines
76
and
77
. A first triangular bottom web panel
78
is articulated to the third bottom panel
63
, along fold line
64
, and is further articulated to the fourth bottom panel
75
along fold line
76
. The first triangular web panel
78
is further defined by a raw edge
79
which extends from the diagonal raw edge
67
generally orthogonal to the fold line
64
. A second triangular web panel
80
is similarly articulated to the fourth bottom panel
75
along fold line
77
. The second triangular web panel
80
is defined further by a raw edge
81
and by fold line
82
which extends collinearly from the fold line
19
.
A fourth top panel
83
is articulated to the fourth side panel
18
along fold line
74
. The fourth top panel
83
is defined further by converging fold lines
84
and
85
. A first triangular web panel
86
is arti
Davis & Bujold P.L.L.C.
Kim Eugene
Sharon Manufacturing Co., Inc.
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