Technical Field
[0001] The present invention relates to a heat-shrinkable film package of a vessel for groceries,
etc., and more specifically to a heat-shrinkable film package capable of newly re-utilizing
a vessel after consuming a grocery, etc., contained therein as a vessel for reserving
for a long period of time and/or a cooking vessel.
Background of the Invention
[0002] Hitherto, as means for storing groceries such as jams, honeys, coffees, etc., for
along period of time without changing the qualities, there are vessels for containing
them in tightly sealed state, such as bottled goods, etc. However, because in a sealed
vessel of prior art, when the vessel is once opened, the quality of the grocery contained
is quickly changed, after opening, the grocery must be consumed fast and when this
is neglected, the grocery must be wasted, and the increase of the wasted amount deteriorates
the environment. Also, because in sealed vessels of prior art, when the groceries
contained are consumed, the vessels are wasted as empty bottles or empty cans, they
also cause the increase of the environmental pollution.
[0003] Self-governing bodies are compelled to bear the large expense for the disposals of
the wasted groceries, etc., and empty vessels as described above, and thus, the countermeasure
for reducing the amounts of the wastes has been taken up as national problems.
Disclosure of the Invention
[0004] An object of the invention is to provide a heat-shrinkable film package capable of
storing contained groceries for a long period of time not only before opening the
seal of the packed vessel but also after opening the seal of the vessel.
[0005] Other object of the invention is to provide a heat-shrinkable film package, which
reduces the wasted amounts of groceries, etc., by capable of storing the groceries
contained thereon for a long period of time after opening the seal of the packed vessel,
and also, contributes to reduce the amounts of waste materials by making it possible
to utilize the empty vessel after consuming the groceries, etc., contained therein
as a new vessel for storing for a long period of time and/or a cooking vessel without
wasting the empty vessels.
[0006] That is, the present invention has been made for attaining the above-described objects
and the invention provides a heat-shrinkable package wherein opening(s) is or are
formed to a lid equipped to the open portion of a vessel main body for sealing the
inside of the vessel, a gas non-permeable sheet having formed air vents at the off
set positions from the openings is disposed on the surface of the outer side of the
lid and closely stuck thereto such that the seat covers the above-described opening
to construct a vessel for containing groceries, etc., and at least the above-described
whole lid is covered with a heat-shrinkable film.
[0007] As described above, by covering at least the whole lid with a heat-shrinkable film
before opening the seal of the vessel, the groceries, etc., contained therein can
be stored for a long period of time. The above-described situation is same as the
case of a vessel of prior art.
[0008] However, because in the structure of the vessel in the invention, an opening is formed
in the lid, and, a gas non-permeable sheet having formed air vents at the off set
positions from the opening is disposed on the surface of the outer side of the lid
by closely adhering thereto such that the seat covers the above-described opening,
when a suction means is applied to the outer side of the gas non-permeable sheet and
sucking, the inside air is sucked from the opening through the air vents of the gas
non-permeable sheet, the amount of active oxygen in the inside of the vessel is reduced,
and the reduced-pressure state is maintained. Accordingly, rotting by oxidation of
the groceries, etc., contained is delayed and also, the growth, etc., of bacteria
is restrained, whereby the stable storage for a long period of time becomes possible.
[0009] Also, in the vessel that can be maintained at the reduced-pressure state as described
above, for example, vegetables lightly preserved in salt of rice brain in the reduced-pressure
state can be formed as pickled vegetables of a mild taste in a very short time, and
thus, the vessel can be used as a specific cooking vessel. Also, similarly, about
a jam or liquors (sake, shochu, whisky, etc.), by storing them in the reduced-pressure
state, the quality thereof can be changed to a mild taste in a short time.
[0010] Also, because the above-described vessel in the invention can store groceries, etc.,
for a long period of time even after opening the seal of the vessel, the waste amount
of the groceries, etc., by rotting is reduced, and also because the empty vessel after
consuming the groceries contained can be re-utilized as a vessel for storing for a
long period of time, the amounts of the wastes can be wholly reduced, whereby the
disposal cost of the self-governing bodies can be reduced.
[0011] Also, because the heat-shrinkable film covers at least the whole lid of the vessel,
the film can prevent the occurrences of the movement and slipping of the gas non-permeable
sheet disposed on the outer side of the lid by the contact with outside obstacles,
whereby the leakage, etc., of the groceries contained can be prevented.
Brief Description of the Drawings
[0012]
Fig. 1 (A) and (B) show an embodiment of the heat-shrinkable film package of the invention,
wherein (A) is a cross-sectional view and (B) is a plain view,
Fig. 2 (A) and (B) show the state of the heat-shrinkable film package of Fig. 1 after
opening the seal, wherein (A) is a cross-sectional view and (B) is a plain view,
Fig. 3 (A) and (B) show the views explaining the pressure-reduction operation of a
vessel packed to the heat-shrinkable film package of the invention, wherein (A) is
a cross-sectional view of a gas non-permeable sheet at sucking operation, and (B)
is a cross-sectional view of the gas non-permeable sheet after sucking operation,
Fig. 4 is a cross-sectional view of other embodiment of the heat-shrinkable film package
of the invention,
Fig. 5 is a cross-sectional view of still other embodiment of the heat-shrinkable
film package of the invention,
Fig. 6 is a cross-sectional view of still other embodiment of the heat-shrinkable
film package of the invention,
Fig. 7 is a cross-sectional view of still other embodiment of the heat-shrinkable
film package of the invention,
Fig. 8 is a cross-sectional view of still other embodiment of the heat-shrinkable
film package of the invention,
Fig. 9 is a cross-sectional view of still other embodiment of the heat-shrinkable
film package of the invention,
Fig. 10 is a cross-sectional view of still other embodiment of the heat-shrinkable
film package of the invention, and
Fig. 11 is a cross-sectional view of still other embodiment of the heat-shrinkable
film package of the invention.
Best Mode for Carrying out the Invention
[0013] The heat-shrinkable film package of the invention is constructed of a vessel composed
of a main body containing a grocery and a lid, and a heat-shrinkable film covering
the outer side of the vessel such that tightly sealing at least the portion of the
lid. Also, an opening penetrating the lid from the inside to the outside is formed
in the lid of the vessel, and a gas non-permeable sheet is disposed on the outer surface
of the lid such that the sheet closely adhered to the sheet by covering the above-described
opening. Also, the gas non-permeable sheet is constructed such that the sheet has
air vents at the off set positions from the position corresponding to the opening
of the lid.
[0014] It is better to install the above-described lid to an opening portion of the vessel
main body via packing. The packing not only improve the adhesion of the opening portion
of the vessel main body and the lid but also prevents entering of air and various
bacteria in the case of reduce the pressure of the inside of the vessel, whereby the
keeping quality of the inside grocery for a long period time is more improved. The
packing may be simply placed between the vessel main body and the lid, may be adhered
to the lid side, or may be adhered to the vessel main body side, but preferably, it
is better to adhere the packing to the lid side from the convenience of handling property.
[0015] Furthermore, in addition to the above-described packing a tightly sealing sheet may
be directly adhered to the opening portion of the vessel main body to seal the vessel.
By directly adhering such a tightly sealing sheet to the opening portion of the vessel
main body, the keeping quality for a long period of time of the grocery contained
in the vessel before opening the seal of the vessel can be more improved. As the tightly
sealing sheet, an aluminum vapor deposited resin film, a laminate sheet of a resin
film and a resin film, a laminated sheet of a paper and a resin sheet, etc., can be
used.
[0016] In the invention, the heat-shrinkable film of covering the outer side of the vessel
has a function of tightly sealing the inside of the vessel before opening the seal
to obtain the keeping quality of the grocery contained in the inside for a long period
of time. Accordingly, it is necessary that the heat-shrinkable film covers at least
the whole outer side of the lid of the vessel, and because the inside of the vessel
is made a closely sealed state by covering at least the whole lid as described above,
the contained grocery, etc., can be stored for a long period of time.
[0017] Preferably, in the case of containing a grocery, etc., in the vessel before covering
with the heat-shrinkable film as described above, by making the inside of the vessel
substantially a sterile state by heating or by reducing the amount of active oxygen
by a pressure-reducing treatment, the preservation of a longer period of time becomes
possible.
[0018] By heat-treating the heat-shrinkable film in the case of covering the vessel, the
heat-shrinkable film is shrunk by itself to fast-stuck to the outer surface of the
vessel, whereby a high sealing property is obtained. Particularly, by covering the
outer side of the gas non-permeable sheet disposed on the outer surface of the lid
with the heat-shrinkable film, the sheet is not brought into contact with other materials,
whereby the sheet is not simply released or does not fall off.
[0019] As the material of the heat-shrinkable film used in the invention, any stretched
synthetic resin films can be used. Stretching may be uniaxial or biaxial, and, for
example, there are uniaxially or biaxially stretched polyethylene film, polypropylene
film, polyester film, polyvinyl chloride film, polyvinyldene film, etc. The thickness
of the film differs according to the size, the weight, the form, etc., of the vessel,
but is preferably from about 10 to 20 µm.
[0020] As the heat-shrinkable film before packing, it is better to use the heat-shrinkable
film of a tube form and being stretched to at least the tube peripheral direction.
As a method of obtained such a heat-shrinkable film tube, there are a method of connecting
a synthetic resin film to a tube by a fusing seal method, a ultrasonic sealing method,
or a solvent connecting method, and a method of jetting a molten resin in a film form
from slit holes formed by intermittently circularly disposing circular arc-form slits
and while introducing air from the space between the adjacent slit holes, welding
the films formed from the slid holes to form a tube-form film.
[0021] When the vessel containing groceries, etc., is packed with the above-described film
tube, the vessel is inserted into the film tube from one opening of the film tube,
the outer side thereof is heated to thermally shrinking the film tube to fast-stuck
the film tube to the outer side surface of the vessel, and further both the end portions
of the film tube can be sealed by welding to form a package.
[0022] Opening of the seal of the heat-shrinkable film package is carried out by cut-opening
the heat-shrinkable film and removing, and thereafter, the lid is detached. For making
easy the cut-opening and removal of the heat-shrinkable film as described above, if
necessary, sewing machine stitches may be formed in a line form at the heat-shrinkable
film or a short cut may be formed at the end portion of the heat-shrinkable film.
In this case, it is necessary to form such a sewing machine stitches or a short cut
for cut opening as described above so that the tight sealing property of the vessel
is not hindered. For the purpose, the sewing machine stitches or the short cut must
not be formed at the portion of covering the gas non-permeable sheet and must be formed
at other portion than the covered portion of the gas non-permeable sheet.
[0023] In the invention, there is no particular restriction on the size of the vessel covered
by the heat-shrinkable film and the heat-shrinkable film can be applied to from a
small-sized vessel for domestic use to a large-sized vessel for business use. For
example, the film can be applied to from a small-sized vessel of sample bottle to
a large-sized vessel of a hotel pan. Also, as the constituting material of the vessel
main body and the lid, a glass, a metal, a resin, a pottery, etc., can be used.
[0024] Also, in the vessel used in the invention, in order to make it possible to store
the groceries, etc., contained therein for a long period of time after opening by
cutting and removing the heat-shrinkable film and opening the seal, and further to
reutilize the vessel as a vessel for storing for a long period of time after it becomes
an empty vessel, an opening penetrating from the inside to outside is formed to the
lid, and further, a gas non-permeable sheet is disposed on the outer surface of the
lid such that the sheet is fast stuck thereto to cover the opening, and also, air
vents are formed to the gas non-permeable sheet at the positions off set from the
opening of the lid.
[0025] As the opening formed at the lid, there are no particular restrictions on the form,
the number, and the size thereof when the opening(s) are covered by the gas non-permeable
sheet, the sheet can be kept thereon as sucked state by a reduced pressure (negative
pressure) of the inside of the vessel. As the form of the opening, a circle is preferred
but an ellipse, polygons such as a triangle, a square, etc., a star form, a slit form,
etc., can be employed.
[0026] The number of the opening may be one or plural. When the number of the opening is
one, the productivity of the lids can be improved, and when the number of the opening
is plural, between the adjacent openings, the tensile force of pulling the gas non-permeable
sheet is acted. Also, in the case of forming plural openings, the sizes and the forms
thereof may be same or different.
[0027] As to the size of the opening, it is better that the maximum distance of crossing
the opening (diameter in the case of a circle) is from 3 mm to 15 mm. When the maximum
distance is shorter than 3 mm, bending and deformation of the gas non-permeable sheet
is small and the adsorptivity becomes weak. Also, when the maxim distance is larger
than 15 mm, the necessary area of the gas non-permeable sheet becomes excessively
large, which is undesirable from the point of cost. Also, in this case, the gas non-permeable
sheet becomes too large and as the result thereof, it is required to use a large suction
means, which is hard to handle.
[0028] The place of forming the opening to the lid is preferably the upper surface in the
point of insuring the holding property of the gas non-permeable sheet. Also, in the
portion of forming the opening, it is preferred to form a concaved portion depressed
to the inside. When such a concaved portion is formed and the gas non-permeable sheet
is kept in the concaved portion, the gas non-permeable sheet is not released by a
strong contact with other outside material, whereby the adsorptivity of the gas non-permeable
sheet can be improved.
[0029] As the gas non-permeable sheet, a material, which is gas non-permeable and has flexibility,
is used. Also, because the gas non-permeable sheet alternately repeats a flat state
and bent state in the state of disposed on the upper surface of the lid, it is preferred
to use an elastic material excellent in the elastic recovering property as the gas
non-permeable sheet. The material having a heat resistance enduring high temperature
in addition to the above-described properties is more preferred.
[0030] The material for such a sheet includes, for example, a silicone rubber, a thermoplastic
polymer elastomer, and synthetic or natural rubbers. In these materials, a silicone
rubber is particularly preferred.
[0031] The thermoplastic polymer elastomer includes a polyamide-base elastomer, a polyurethane-base
elastomer, a polyester-base elastomer, a polyolefin-base elastomer, a styrene black-base
elastomer, etc. In these materials, a silicone rubber is particularly preferred.
[0032] There is no particular restriction on the form of the gas non-permeable sheet when
the sheet can cover the opening formed to the lid and air vents are formed at the
positions thereof off set from the place corresponding to the opening. For example,
as the form thereof, a circle, an ellipse, polygons, etc., can be employed, and a
circle is particularly preferred. Also, the area of the gas non-permeable sheet is
larger than the size of the opening formed to the lid and must cover the whole opening.
When plural openings are formed to the lid, the gas non-permeable sheet must simultaneously
cover all of these openings.
[0033] Also, in the gas non-permeable sheet, air vents are formed thereto at the positions
off set from the place corresponding to the opening formed to the lid in the case
of being placed on the lid. The air vents are used as the exhaust gas passages of
air in the inside in the case of carrying out the pressure-reducing operation of the
inside of the vessel by applying the suction hole of the suction means on the upper
surface of the gas non-permeable sheet as will be described below. There are no particular
restrictions on the form and the size of the air vents, but as the form, a circle
is preferred and as the size, a sufficiently smaller size than the size of the opening
of the lid is preferred. For example, the diameter of the air vent may be from about
0.3 to 2.0 mm. Also, the thickness of the gas non-permeable sheet is from about 0.5
to 3 mm.
[0034] It is preferred that the surface of the gas non-permeable sheet and the surface of
the lid at the portion that the gas non-permeable sheet is closely stuck to the upper
surface the lid are mirror planes to improve the sealing property. More practically,
it is preferred that the upper surface of the lid and the surface of the gas non-permeable
sheet are mirror planes having a surface roughness of 0.2 S or lower. Also, it is
preferred that beveling of curve surface is applied to the edge of the opening of
the lid. By applying such a beveling of the curved surface, when the gas non-permeable
sheet is brought into contact with the edge of the opening of the lid and is bent
and deformed, the gas non-permeable sheet cannot be injured by the edge.
[0035] In the case of making the inside of the vessel a reduced pressure state (negative
pressure state), first the suction hole of a suction means is placed on the outer
surface of the gas non-permeable sheet disposed on the outer side surface of the lid.
In this case, the suction hole is placed on the gas non-permeable sheet such that
the opening of the lid and the air vents of the gas non-permeable sheet are located
at the inside of the suction hole, and in the state, sucking operation is carried
out. By the sucking operation, the gas non-permeable sheet becomes the state of being
inflated to the inner side of the suction hole of the suction means, air in the vessel
is sucked out to the outside from the opening of the lid through the air vents of
the gas non-permeable sheet, and the inside of the vessel becomes a reduced pressure
state. When the inside pressure reaches a definite reduced pressure, the sucking operation
is stopped, the gas non-permeable sheet is closely stuck to the outer surface of the
lid and also the portion of the sheet corresponding to the opening of the lid becomes
the state of being bent to the inner side.
[0036] Because by the gas non-permeable sheet, the inside of the vessel is brought into
a reduced pressure state and the vessel is sealed, the entrance of various bacteria
into the inside of the vessel is prevented and also the growth, etc., of bacteria
are prevented. Also, because active oxygen remaining in the inside of the vessel becomes
rare, the occurrence of the oxidation reaction of the contained groceries is delayed
and even after opening the vessel, the groceries contained therein can be preserved
for a long period of time. Also, even after consuming the contained groceries, the
vessel can be re-utilized as a vessel for reserving groceries for a long period of
time.
[0037] Then, the present invention is practically explained by the embodiments shown in
the accompanying drawings.
[0038] Fig. 1 (A) and (B) show an embodiment of the heat-shrinkable film package of the
invention.
[0039] A vessel 1 is constructed of a cylindrical heat-resisting glass-made vessel main
body 2 and a heat-resisting glass-made lid 3 of closing the open portion of the vessel
via a sealing packing 4. A heat-shrinkable film F covers the whole outer side of the
vessel 1 such that the vessel is tightly sealed, and the inside of the vessel is sealed.
[0040] The packing 4 is formed such that the packing is stuck to the outer periphery of
the inner surface of the lid 3. Also, a tightly sealing sheet 6 is stuck to the upper
edge 5 of the open portion of the vessel main body 2, the groceries (goods) S in the
inside of the vessel are also sealed by the tightly sealing sheet 6, and protected
such that the groceries are not deteriorated and leaked.
[0041] In the above-described vessel 1, an opening 7 is formed at the center portion of
the lid 3 and a concaved portion 10 is formed at the upper surface region including
the opening 7 in a concentric circle form with the opening 7. On the concaved portion
10 is placed a gas non-permeable sheet 8 such that the sheet covers the opening 7
and to the gas non-permeable sheet 8 are formed plural (four in the figure) air vents
12 at the places gas non-permeable sheet 8 off set from the position corresponding
to the opening 7.
[0042] In the case of opening the seal of the vessel from the package covered by the heat-shrinkable
film F as described above, first the heat-shrinkable film F is open by cutting and
removed, the vessel 1 is taken out, then the lid 3 is detached and the sealing sheet
6 may be released and removed. When the vessel 1 is once opened, by simply placing
the lid 3 thereafter, the deterioration of the groceries S in the inside proceed faster
than before opening the vessel.
[0043] Fig 2 (A) and (B) show the state that the lid 3 is placed on the vessel 1 after opening
as described above, and then the inside thereof is evacuated (negative pressure).
In the gas non-permeable sheet 8 disposed on the upper surface of the lid 3, because
the inside of the vessel is in a negative pressure, the portion of the gas non-permeable
sheet corresponding to the opening 7 is bent or deformed in a concaved form to the
inner side, and also, the gas non-permeable sheet is tightly stuck to the upper surface
of the lid 3 not corresponding to the opening 7 and seals, whereby the inside of the
vessel is maintained at a negative pressure state.
[0044] By sealing the vessel 1 and maintaining the inside pressure thereof in a reduced
pressure state, the entrance of various bacteria, etc., into the inside of the vessel
and the growth of bacteria are prevented, and also active oxygen in the inside of
the vessel becomes rare, whereby the deterioration of the contained groceries S is
delayed and even after opening, the storage for a long period of time becomes possible.
Also, the empty vessel 1 after consuming all the contained groceries S can be re-utilized
as the vessel for storing for a long period of time by the use as described above.
[0045] Also, when the vessel 1,which can maintain a reduced pressure state as described
above, contains therein pickles, jams, or liquors, etc., and is stored, the tastes
thereof can be changed to mild tastes in a short time. Accordingly, the vessel can
be also re-utilized as a special cooking vessel.
[0046] Also the gas non-permeable sheet 8 is in the state of being disposed in the concaved
portion 10 of the lid 3, the area of the concaved portion 10 is larger than the area
of the sheet 8, and the depth is same as the thickness of the sheet 8 or thicker than
the thickness thereof. Accordingly, the sheet 8 is not projected over the opening
of the concaved portion 10 and cannot become unstable in the case of piling the vessels
1.
[0047] Also, the state that the gas non-permeable sheet 8 is bent to the inner side at the
portion of the opening 7 of the lid 3 and kept by adsorbing as described above is
maintained until the vessel 1 is opened and the reduced pressure is released, and
when the reduced pressure is released, the bent state of the sheet 8 is returned to
a flat state by the elastic force thereof. Accordingly, by confirming the presence
or absence of the bent state of the sheet 8, whether or not the vessel 1 is opened
on the way can be easily confirmed. That is, whether or not a poison, etc., is admixed
in the vessel by a mischief, etc., can be checked beforehand.
[0048] Because when the inside of the vessel is in a reduced pressure state, by the action
of the atmospheric pressure, the lid 3 is hard to open by a weak force, and thus,
by the easiness or not of opening the lid 3, whether or not the vessel is opened on
the way can be confirmed. That is, whether or not a poison, etc., is admixed in the
vessel can be checked beforehand.
[0049] The operation of making the inside of the vessel 1 described above a reduced pressure
state can be practiced as shown in Fig. 3 (A) and (B).
[0050] First, the opening 7 of the lid 3 is covered by a flexible gas non-permeable sheet
8 at the upper surface of the lid, and the sheet 8 is placed on the lid 3 such that
the air vents 12 of the sheet 8 is off set from the opening 7, and then, the sucking
hole Km of a sucking means K is pushed to the outer surface of the sheet 8. In this
case, the sucking hole Km is set such that the opening 7 and the air vents 12 are
all positioned in the inside of the sucking hole.
[0051] Then, when sucking is carried out by the sucking means K, the sheet 8 is bent as
rising to the sucking side as shown in Fig. 3 (A), and a gas such as air in the inside
of the vessel is sucked out from the opening 7 through the air vents 12 as indicated
by arrow, and the pressure of the inside of the vessel is reduced to a negative pressure.
[0052] When the inside of the vessel becomes a definite negative pressure and then the sucking
operation is stopped, the sheet 8 is sucked back to the vessel side by the negative
pressure of the inside of the vessel, the sheet is closely stuck onto the upper surface
of the lid 2 and also the portion of the sheet corresponding to the opening 7 is bent
in a concaved form to the inner side of vessel as shown in Fig. 3 (B).
[0053] Fig. 4 to Fig. 11 show other embodiments of the heat-shrinkable film package of the
invention.
[0054] The heat-shrinkable film package shown in Fig. 4 is almost same as the embodiment
of Fig. 1 but in this case, the heat-shrinkable film F does not cover the whole body
of the vessel 1 but covers the whole body of the lid 3 and the portion near the open
portion of the vessel main body 1. Because the heat-shrinkable film F in the heat-shrinkable
film package covers at least the whole lid body, the sealing property of the inside
of the vessel is maintained, and the storing property for a long period of time before
opening the vessel is maintained.
[0055] In the heat-shrinkable film package shown in Fig. 5, the heat-shrinkable film F covers
the whole lid as the embodiment of Fig. 4. However, different from the embodiments
shown in Fig. 1 and Fig. 4, the sealing sheet 6 is not stuck to the open portion of
the vessel main body 2, the inside of the vessel is made a negative pressure state
by a pressure reducing treatment. For the purpose, the gas non-permeable sheet 8 is
in the state of bending the inner side in the opening 7 of the lid 3. In the heat-shrinkable
film package, before releasing the sheet 8, the lid 3 is adsorbed by the action of
the reduced pressure action of the inside of the vessel, the vessel cannot be open.
[0056] In a heat-shrinkable film package shown in Fig. 6, the form and the material of a
vessel 1 are different from those of the embodiments of Fig. 1, Fig. 4, Fig. 5, etc.
That is, a lid 3 is made of a heat-resisting glass but the vessel main body 2 is made
of a metal such as stainless steel, etc. Also, a difference in level is formed at
the peripheral portion of the inner surface of the lid 3 to prevent the occurrence
of gap of packing 4. The heat-shrinkable film F does not cover the whole vessel main
body and covers the lid 3, the sheet 8, and the open portion region of the vessel
main body 2. Even by partial covering, because the sheet covers at least the whole
body of the lid 3, the inside of the vessel can be sealed.
[0057] In a heat-shrinkable film package shown in Fig. 7. a vessel main body 2 and a lid
3 are made of a heat-resisting glass but the form of the vessel main body 2 is a truncated
cone form and the lid 3 is a bowl form. Also, a heat-shrinkable film F covers the
whole body of the vessel 1.
[0058] In a heat-shrinkable film package shown in Fig. 8, a vessel main body 2 and a lid
3 are made of a metal such as a stainless steel, etc., and the form of the vessel
main body 2 is truncated cone form. A heat-shrinkable film F covers the whole body
of the vessel 1.
[0059] In a heat-shrinkable film package shown in Fig. 9, a male screw 13 is formed at the
open portion of a cylindrical heat-resisting glass-made vessel main body 2 and a vessel
1 is constructed such that a metal-made lid 3 having formed a female screw 14 screwing
with the male screw 13 is mounted on the vessel via a sealing packing 4 and a sealing
sheet 6. A heat-shrinkable film F covers the whole body of the vessel 1.
[0060] In a heat-shrinkable film package shown in Fig. 10, the vessel main body 2 is composed
of a glass jar, and as the case of the embodiment of Fig. 9, a male screw 13 is formed
at the open portion of the vessel and the vessel is constructed such that a lid 3
having formed a female screw 14 screwing with the male screw 13 is mounted on the
vessel via a packing 4. A tightly sealing sheet 6 is not used, and also the pressure
of the inside of the vessel is not reduced, and a heat-shrinkable film F covers the
whole body of the vessel 1.
[0061] In a heat-shrinkable film package shown in Fig. 11, parallel linear sewing machine
stitches 15, 15 are formed lengthwise and breadthwise to a heat-shrinkable film F
covering the outer side of the vessel, and by breaking the heat-shrinkable film F
via the sewing machine stitches 15, 15, the package can be easily opened. These sewing
machine stitches 15, 15 are formed avoiding the portion of covering a gas non-permeable
sheet 8 with the heat-shrinkable film F so that the sealing property of the vessel
1 is not hindered by the heat-shrinkable film F. It is preferable that the sewing
machine stitches 15, 15, are formed avoiding all the portion of covering the lid 3.
[0062] The heat-shrinkable film package of the invention described above is for containing
groceries but the package can be effectively used for, in addition to groceries, powders,
chemicals, etc., which are liable to be deteriorated by humidity and the occurrence
of quality change after opening the seal is delayed and they can be also stored for
a long period of time.
[0063] As described above, according to the invention, by covering at least the whole lid
with the heat-shrinkable film before opening the seal of the vessel, contained groceries,
etc., can be stored for a long period of time. Furthermore, because, as the structure
of the vessel, opening(s) are formed to the lid and a gas non-permeable sheet having
formed air vents at the places of off set from the opening(s) is placed on the outer
surface of the lid closely stuck thereto such that the sheet covers the above-described
opening(s), when a sucking means is placed on the outer side of the gas non-permeable
sheet and sucking is carried out, air in the inside of the vessel is sucked out from
the opening(s) of the lid through the air vents of the gas non-permeable sheet, active
oxygen in the inside is reduced and a reduced pressure state of the vessel is maintained,
whereby rotting by oxidation of the contained groceries, etc., is delayed, also the
growth, etc., of bacteria are restrained, and the contained groceries, etc., can be
stably stored for a long period of time.
[0064] Also, because in the invention, after opening the seal, the contained groceries,
etc., can be stored for a long period of time, the amount of wastes such as groceries,
etc., by rotting is reduced and the empty vessel after consuming the contained groceries,
etc., can be re-utilized as a vessel for storing for a long period of time. Also,
the empty vessel can be re-utilized as a specific cooking vessel. Accordingly, in
the invention, the amount of waste materials is wholly reduced and the disposal cost
by self-governing bodies can be reduced.
Industrial Applicability
[0065] The vessel of the heat-shrinkable film package of the invention can be utilized as
a vessel for storing groceries, medical supplies, etc., for a long period of time
and/or as a cooking vessel for foods. Also, the invention can reduce the amount of
waste materials and can contribute to the environmental preservation of the earth.