JPH05330521A - Deaerating method for interior of packing bag for film unit with lens - Google Patents

Abstract

PURPOSE:To prevent useless expansion of a packing bag which is packed in a moisture-proofing manner with a film unit with a lens. CONSTITUTION:When the other end side 12c of a packing bag 2 is temporarily sealed by means of a heater 18, a vent hole 22 is formed by mean of a needle 20. The one end side 12b of the packing bag 2 is regularly sealed by means of a heater 28. Further, the other end side 12c is regularly sealed by means of a heater 30. In a process wherein regular sealing is executed by means of the heaters 28 and 30, the air in the packing bag 2 is escaped through the vent hole 22. When regular sealing is executed by means of the heater 30, the air hole 22 is closed and the packing bag 2 is sealed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for degassing the inside of a packaging bag for moisture-proof packaging of a lens-fitted film unit.

[0002]

[Prior Art] In order to enjoy photography easily at a low price, the applicant has provided a film unit with a lens such as "Sharing Run High" and "Sharing Run Panoramic" (both are trade names). It is commercially available. These lens-fitted photo film units are generally widely used because they can be taken immediately on the spot when they are purchased, and they can be taken to a developing shop as they are after shooting.

The film unit with a lens is loaded with the film during the manufacturing process thereof, and therefore it is necessary to protect the film from moisture after the manufacturing process until the film is actually used by the user. For this reason, the lens-fitted film unit is individually packaged in a packaging bag having a moisture-proof function when shipped from the manufacturer, and the user opens the packaging bag at the time of use. As a material for a packaging bag having such an application, for example, an aluminum sheet or a resin sheet laminated with high airtightness is used. I try to keep it airtight.

[0004]

However, when performing the airtight packaging as described above, the final sealing may be performed in a state where air remains in the packaging bag. In such a case, since the packaging bag is sealed in a completely airtight state, the inside of the packaging bag cannot be degassed once it has been packaged. And, if a certain amount of air is kept inside the packaging bag, the packaging bag swells and it is not possible to give a compact impression when it is displayed at the store. Further, when the packaging bag is inflated, there is a drawback that handling such as when accumulating and packaging a large number of products is troublesome, resulting in high transportation cost. Then, when the outside air temperature rises, the packaging bag may further inflate, and in an extreme case, a part of the seal may peel off.

The present invention has been made to solve the above problems, and an object thereof is to provide a method for efficiently degassing the inside of a packaging bag in the process of hermetically packaging a lens-fitted film unit. is there.

[0006]

Means for Solving the Problems To achieve the above object, the present invention seals one end of a tubular packaging bag and then the other end when packaging the lens-fitted film unit in a flexible packaging bag. Put the lens-fitted film unit in the packaging bag from the open side of the side, temporarily seal the other end side and form a ventilation hole in a part of the packaging bag close to the temporary seal part, and A region including a portion having a vent hole is pinched by a heater, and deaeration is performed through the vent hole by this pinching, and after venting, the vent hole is closed by heat sealing. Further, when sealing both ends of the tubular packaging bag, it is also an effective means to depressurize the inside of the packaging bag by pressing the elastic holding member against the lens-fitted film unit from the outside of the packaging bag. ..

[0007]

EXAMPLE FIG. 4 shows a state in which a packaging bag in which a lens-fitted film unit is wrapped is partially broken. The packaging bag 2 is made of a sheet material having excellent moisture resistance, and the lens-fitted film unit 3 packaged therein is housed in an airtight manner. The packaging bag 2 encloses the lens-fitted film unit 3 in the form of a so-called pillow packaging, and one projecting piece 3a is provided with a hole 4 for hanging a hanger. Then, the lens-fitted film unit 3 is displayed in a state of being air-tightly packaged by the packaging bag 2 while being hung at the store.

The sheet material 2a constituting the packaging bag 2 has the layer structure shown in FIG. 5, for example. In the figure, the upper side is the surface side in contact with the outside air, and the lower side is the inner surface side in contact with the lens-fitted film unit 3. The base material 5 is composed of a polyester sheet 7 sandwiching an aluminum foil 6, and an ever film 8 suitable for heat welding is provided on the inner surface side thereof. An anchor coat 9, a printing ink layer 10, and a polyester film 11 are formed on the surface side.

The lens-fitted film unit 3 is packed in a packaging bag 2
Although the work of enclosing in (1) is automated by an automatic packaging machine, the outline of the packaging process will be described with reference to FIGS. 1 to 3. After the sheet material 2 is cut into a rectangle of a predetermined size, first, the inner surfaces of the two facing sides are overlapped with each other and heat-welded. The heat-welded portion 12a is bent along the surface of the packaging bag 2 having a tubular shape as shown in FIG. Then, the one end side 12b of the packaging bag 2 is temporarily sealed. This temporary sealing is performed by pressing the heater 14 against the one end side 12b and heat-sealing this portion. The bottom surface of the heater 14 is formed with irregularities corresponding to the thickness of the overlapping portion of the packaging bag 2.
The portion with a small overlapping thickness is securely welded by the convex portion 14a. A rubber base is used as the heater base 15, and reliable welding is performed by utilizing its elasticity. However, when the heater base 15 has high elasticity, a flat bottom surface is used as the heater 14. Also, it is possible to reliably perform welding at portions having different thicknesses. The other end 12c of the packaging bag 2 is opened, and the lens-fitted film unit 3 is inserted from here as shown in FIG.

FIG. 3 shows a deaeration process inside the packaging bag 2 and a sealing packaging process for the lens-fitted film unit 2. In this step, first, as shown in FIG. 3A, the other end 12c of the packaging bag 2 containing the lens-fitted film unit 3 is temporarily sealed. The heater 18 is used for this temporary seal.
And a rubber heater base 19 are used to heat-weld the other end 12c to seal the open end. When this heat welding is performed, the needle 20 also descends as the heater 18 descends, and a ventilation hole 22 is opened on the other end 12c side of the packaging bag 2. Therefore, the inside of the packaging bag 2 communicates with the outside only through the ventilation hole 22,
The other parts are in a sealed state.

After that, the packaging bag 2 is, as shown in FIG. 3B, a conveyor belt 24 running in a direction perpendicular to the paper surface.
It is supplied above and transferred to the main sealing process. In the main sealing process, the restraining member 25 having elasticity such as sponge is used.
Moves down and holds down the front side of the lens-fitted film unit 3. After that, the pair of stoppers 27 enter into the illustrated position so that the left end of the lens-fitted film unit 3 can be supported from the outside of the packaging bag 2. Then, the wide heaters 28, 28 are pressed against the one end side 12b of the packaging bag 2 from above and below, and thermal welding is performed in a wide range including the range of the temporary sealing described above.

When the heaters 28, 28 are pressed, the lens-fitted film unit 3 tries to move leftward in the drawing in the packaging bag 2, but the stopper 27 prevents the movement. Further, since the holding member 25 holds down the lens-fitted film unit 3 together with the packaging bag, the packaging bag 2
There is no big difference. Further, when the heaters 28 and 28 perform the main sealing, the inner volume of the packaging bag 2 is reduced, and the corresponding amount of air is released to the outside through the ventilation hole 22.

Next, the main seal of the other end side 12c is performed.
When the transport belt 24 is driven to bring the packaging bag 2 to the sealing position, the restraining member 25 having elasticity descends to restrain the lens-fitted film unit 3 together with the packaging bag, as shown in FIG. .. Then, the pair of stoppers 29, 29 are inserted into the one end side 12b where the main sealing has been already performed, and regulate the lens-fitted film unit 3 together with the holding member 25 so as not to move to the right.

Subsequently, the other end 12c is heat-welded by the heaters 30, 30. The heaters 30 and 30 are larger in size than the heater 18 used at the time of temporary sealing, and are sized to cover not only the temporarily sealed heat-welded portion but also the vent hole 22 portion. In the process of pinching the other end 12c by the heaters 30, 30, the air in the packaging bag 2 is further pushed out from the ventilation holes 22. When the other end 12c of the packaging bag 2 is clamped between the heaters 30 and 30, the ventilation holes 22 are closed by the overlapping of the packaging bags 2 and welded as they are. As a result, the inner surface of the packaging bag 2 is almost in close contact with the surface of the lens-fitted film unit 3,
The packaging bag 2 is hermetically sealed with no extra space in the packaging bag 2.

In this way, if the inside of the packaging bag 2 is deaerated when the packaging bag 2 is sealed, the packaging bag 2 will be kept even if the outside air temperature rises during the transportation of the product or the exhibition at the store. Does not swell. Therefore, no trouble occurs during transportation, and the appearance does not become unsightly during the display. Further, even when the bag is left in an automobile in the summer, the moisture does not deteriorate because the packaging bag expands and the seal is partially peeled off. In implementing the present invention, the number of ventilation holes 22 is not limited to one. The holes may be provided at any end side of the packaging bag as long as they can be sealed by the heater 28 or the heater 30 in the main sealing step, or at both ends.

Further, the needle 20 is not necessarily required to form the vent hole. For example, when performing temporary sealing with the heater 14 or the heater 18, it is possible to leave a part that is not sealed and use this incompletely sealed portion as a ventilation hole. It is also possible to omit the temporary sealing step and perform deaeration with the holding member 25 and the heaters 28 and 30. In this case, the open end itself, which is gradually closed during the main sealing with the heaters 28 and 30, acts as a ventilation hole.

[0017]

As described above, according to the method of the present invention, the ventilation holes for deaeration are formed in the packaging bag during the moisture-proof packaging of the lens-fitted film unit, and during the packaging bag sealing step. Since the vent hole is closed, the inside of the packaging bag can be easily degassed without increasing the number of special steps. In addition, when performing the main seal, the lens-fitted film unit is pressed from the outside of the packaging bag with a highly elastic restraining member, and the inner surface of the packaging bag is brought into close contact with the lens-fitted film unit to leave an extra space inside the packaging bag. By avoiding this, reliable degassing can be performed. Therefore, even if a packaging bag that is required to be airtight is used, the packaging bag does not bulge and the appearance when displayed in a store is not unsightly, and the product is efficiently handled during transportation.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a state in which one end side of a packaging bag is temporarily sealed.

FIG. 2 is an explanatory diagram when a lens-fitted film unit is put in a packaging bag.

FIG. 3 is an explanatory diagram showing an outline of a deaeration and sealing process of a packaging bag.

FIG. 4 is a partially cutaway perspective view of a packaging bag accommodating a lens-fitted film unit.

FIG. 5 is an explanatory diagram showing a layer structure of a sheet material of a packaging bag.

[Explanation of symbols]

 2 Packaging bag 3 Film unit with lens 14, 18, 28, 30 Heater 15, 16 Heater stand 20 Needle 22 Vent hole 25 Suppression member 27, 29 Stopper

Claims (2)

[Claims] 1. A packaging process for sealing a lens-fitted film unit in a moisture-proof packaging bag, wherein one end of the tubular packaging bag is sealed and then the lens-fitted film unit is opened from the opening on the other end. Put it in a packaging bag, temporarily seal the other end side and form a ventilation hole in a part of the packaging bag close to this temporary sealing part, A method for deaerating the inside of a packaging bag of a lens-fitted film unit, comprising depressurizing with a heater to degas through the ventilation hole and closing the hole with a heat seal. 2. A lens-fitted film unit is inserted into a tubular packaging bag in a packaging step of hermetically packing a lens-fitted film unit in a moisture-proof packaging bag, and the lens-fitted film unit is mounted by an elastic holding member. A method for deaerating the inside of a packaging bag of a film unit with a lens, which comprises pressing the air from the outside of the packaging bag to push out the air in the packaging bag and then sealing the open end of the packaging bag.