Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Reexamination Certificate
2001-08-10
2004-01-06
Crispino, Richard (Department: 1734)
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
C156S250000, C156S543000, C428S137000, C428S138000, C206S815000
Reexamination Certificate
active
06673188
ABSTRACT:
FIELD OF ART
The present invention relates to a dust sealing label strip having a plurality of dust sealing labels for sealing handle openings provided in a corrugated box for handling, and a system using the dust sealing label strip for applying the dust sealing labels over the handle openings of a corrugated box.
BACKGROUND ART
Corrugated boxes are known having a pair of handle openings in its opposed side walls for handling. Such handle openings are convenient for handling, but allow contaminants to enter the interior of the corrugated box. Such entrance of contaminants may, for example, cause deterioration of quality or failure of the packaged goods when the goods packaged in the corrugated box are pharmaceutical products, precision machinery, or the like.
In this regard, corrugated boxes with no handle opening are often used for packaging pharmaceutical products and the like, which results in inconvenience in handling. Alternatively, it is proposed to wrap the goods in a film before packaging in a corrugated box with handle openings. In this case, however, quite onerous operations are required in wrapping the goods in a film.
In order to overcome these troubles, for example, JP-A-62-168850 and JP-A-58-188646 propose dust protective pieces that block handle openings of a corrugated box yet allow fingers to be inserted through the openings. Such conventional dust protective pieces are discussed with reference to
FIG. 8
below.
FIG.
8
(
a
) is a plan view of a strip
80
consisting of a plurality of contiguous dust protective pieces
80
a
connected in series, and FIG.
8
(
b
) is a cross sectional view taken along lines B—B in FIG.
8
(
a
).
The strip
80
is provided with perforated lines
81
along the opposed ends of each dust protective piece
80
a
for facilitating splitting of the strip into each dust protective piece
80
a
. Each dust protective piece
80
a
includes a cardboard
82
having an aperture
82
a
provided corresponding to a handle opening of a corrugated box, a film
83
laminated to the front surface of the cardboard
82
to seal the aperture
82
a
, and an adhesive layer
84
applied over the rear surface of the cardboard
82
. The film
83
is made of a highly stretchable material such as polyurethane or latex, so that fingers may be inserted through the handle opening while the opening is blocked with the film. It is also proposed to provide a release liner over the adhesive layer
84
on the strip
80
for protecting the adhesive layer.
Before applying this dust protective piece
80
a
over a handle opening of a corrugated box, it is necessary to cut the strip
80
along the perforated lines
81
into pieces, apply water over the adhesive layer to give adhesiveness, and manually apply each piece to the desired location on the corrugated box. When a release liner is provided over the adhesive layer, it is also necessary before use to cut the strip
80
along the perforated lines
81
into pieces as the strip
80
is peeled from the release liner, and manually apply each piece to the desired location on the corrugated box.
In the prior art discussed above, it is required to cut the strip and, after the strip is split into single pieces, to pick and apply each single piece to the desired location on a corrugated box. Thus, in order to mechanize the process from the cutting of the strip of contiguous dust protective pieces into pieces to the application of each cut-off dust protective piece to a desired location on a corrugated box, mechanization is particularly required of the series of operations including picking up of each separated single dust protective piece and applying the same to a desired location on a corrugated box, which is quite difficult. Accordingly, such series of operations are in practice performed manually.
In spite of such difficulties, demand for corrugated boxes with such dust seals has recently been increasing, in particular in the medical industries. Development of a system is thus demanded for applying more rapidly dust protective pieces that seal handle openings of corrugated boxes and yet provide grips on the boxes, to realize mass production of corrugated boxes having dust protective pieces attached thereto in a short time.
In order to ensure sufficient strength of the handle openings of a corrugated box, the dust protective piece of the art is made of cardboard acting as a substrate to which the film is attached, as discussed above. When such dust protective pieces are attached to the outer surface of a corrugated box, the pieces may be damaged or peeled off due to abrasion between the boxes during transportation, which may also cause problems in appearance. Thus conventional dust protective pieces are usually applied to the inner surface of a corrugated box. Application of the dust protective pieces to the inner surface of a box may be easily performed manually, but cannot be mechanized readily.
DISCLOSURE OF THE INVENTION
It is an object of the present invention to provide a dust sealing label strip having dust sealing labels that seal a corrugated box against dust and provide grips on the box, and usable in rapid application of the sealing labels over handle openings of corrugated boxes.
It is another object of the present invention to provide a dust sealing label strip having dust sealing labels that may be applied on the outer surface of a corrugated box to seal its handle openings without being damaged or peeled off due to abrasion of the corrugated boxes during transportation, and usable in rapid application of the sealing labels over the handle openings of corrugated boxes.
It is yet another object of the present invention to provide a system for applying dust sealing labels that enables rapid application of dust sealing labels over handle openings of corrugated boxes, and realizes mass production of the corrugated boxes with the dust sealing labels in a short time.
According to the present invention, there is provided a dust sealing label strip comprising a plurality of dust sealing labels arranged on a release liner strip for application over a handle opening of a corrugated box to seal the opening, each of said dust sealing labels comprising:
a substrate having an aperture provided corresponding to a handle opening of a corrugated box,
a stretchable film laminated to said substrate to block said aperture, and
an adhesive layer,
wherein said plurality of dust sealing labels are arranged peelably via said adhesive layer on said release liner strip in at least one line at predetermined intervals.
The dust sealing label strip according to the present invention (sometimes referred to as a “strip of the present invention” hereinbelow) is characterized particularly by the peelable and adhesive arrangement of the plurality of dust sealing labels on a release liner strip in at least one line at predetermined intervals. The present strip is not a strip of a plurality of contiguous dust sealing labels that are to be cut into pieces, nor a strip of a plurality of contiguous dust sealing labels.
The present strip has the characteristic features mentioned above, so that the conventional strip-cutting step may be eliminated. Further, when the present strip is used in a system for applying dust sealing labels to be discussed later, the conventional series of manual operations including picking up of each separated single dust protective piece and applying the same to a desired location on the corrugated box, may be mechanized. Thus, the present strip enables rapid application of the dust sealing labels to handle openings of corrugated boxes and thus mass production in a short time of the corrugated boxes with the dust sealing labels applied thereon.
In the present strip, if a plurality of dust sealing labels are arranged contiguously on a release liner strip without predetermined intervals, it will be difficult, for example, to ensure peeling of a predetermined number of dust sealing labels in a suction sticker to be discussed later. Such arrangement may also cause failure to accurately position the dust sealing label on a c
Asahi Kakoshi Co., Ltd.
Crispino Richard
Darby & Darby
Purvis Sue A.
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