EP2340218A1 - Packing material - Google Patents

Packing material

Info

Publication number
EP2340218A1
EP2340218A1 EP09737478A EP09737478A EP2340218A1 EP 2340218 A1 EP2340218 A1 EP 2340218A1 EP 09737478 A EP09737478 A EP 09737478A EP 09737478 A EP09737478 A EP 09737478A EP 2340218 A1 EP2340218 A1 EP 2340218A1
Authority
EP
European Patent Office
Prior art keywords
cushioning medium
cushioning
packaging material
medium
medium storage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09737478A
Other languages
German (de)
French (fr)
Other versions
EP2340218B1 (en
Inventor
Taiji Watanabe
Takeshi Narita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Publication of EP2340218A1 publication Critical patent/EP2340218A1/en
Application granted granted Critical
Publication of EP2340218B1 publication Critical patent/EP2340218B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/02—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
    • B65D81/05—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents
    • B65D81/051—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents using pillow-like elements filled with cushioning material, e.g. elastic foam, fabric
    • B65D81/052—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents using pillow-like elements filled with cushioning material, e.g. elastic foam, fabric filled with fluid, e.g. inflatable elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/02—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
    • B65D81/03—Wrappers or envelopes with shock-absorbing properties, e.g. bubble films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2581/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D2581/02—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
    • B65D2581/05—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents
    • B65D2581/051—Details of packaging elements for maintaining contents at spaced relation from package walls, or from other contents
    • B65D2581/052—Materials
    • B65D2581/055—Plastic in general, e.g. foamed plastic, molded plastic, extruded plastic

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Buffer Packaging (AREA)

Abstract

A packing member for packing an article, the packing member includes a portion accommodating a fluid medium; a non-return valve for passing the medium toward the medium accommodating portion along a longitudinal direction of the medium accommodating portion and for stopping the medium in the opposite direction; and a flow path, formed by welding the non-return valve to the medium accommodating portion, for passing the medium, the flow path including a reference flow path portion extending in the longitudinal direction and an expanding flow path portion having a width larger than that of the reference flow path portion.

Description

DESCRIPTION PACKING MATERIAL
[TECHNICAL FIELD]
The present invention relates to a packaging material for wrapping an object for shipment. More specifically, it relates to a packaging material having a check valve which allows cushioning medium to flow into the cushioning medium storage portions of the packaging material, but prevents the cushioning medium from flowing backward from the cushioning medium storage portions.
[BACKGROUND ART]
There have been designed various packaging materials, the cushioning medium storage portions of which are formed by welding together two or more flexible sheets. There have also been designed various check valves for these packaging materials. Some of these check valves are designed so that they allow the cushioning medium to flow into the cushioning medium storage portions, but, do not allow the cushioning medium to flow backward from the cushioning medium storage portions. (Japanese Laid-open Patent Application Hll-216784) .
The conventional check valves, such as those described above, are provided with a means for making complicated or narrow the passage, or passages, of the check valve to prevent the cushioning medium from flowing backward from the cushioning medium storage portion. Thus, these check valves are problematic in that they are low in the efficiency with which the cushioning medium is injected into the cushioning medium storage portions. As one of the means for preventing the provision of a check valve from losing the efficiency is to increase a check valve in size, and also, to increase in length. This means is problematic in that the employment of this means results in increase in the amount of the check valve material, which results in increase in the check valve cost.
[DISCLOSURE OF THE INVENTION]
Thus, the primary object of the present invention is to provide a process cartridge packaging material, which is different from conventional process cartridge packaging materials in the pattern in which a check valve is welded to each of its cushioning medium storage portions, and also, is superior to conventional process cartridge packaging materials, in the efficiency with which cushioning medium can be injected into the cushioning medium storage portions.
According to an aspect of the present invention, there is provided a packing member for packing an article, said packing member includes a medium accommodating portion accommodating medium; a nonreturn valve for passing the medium toward said medium accommodating portion along a longitudinal direction of said medium accommodating portion and for stopping the medium in an opposite direction away from said medium accommodating portion/ and a flow path, formed by welding said non-return valve to said medium accommodating portion, for passing the medium, said flow path including a reference flow path portion extending in the longitudinal direction and an expanded flow path portion having a width larger than that of said reference flow path portion.
These and other objects, features, and advantages of the present invention will become more apparent upon consideration of the following description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings.
[BRIEF DESCRIPTION OF THE DRAWINGS]
Figure 1 is a plan of a piece of packaging material in the first preferred embodiments of the present invention.
Figure 2 is a sectional view of one of the cushioning units of the packaging material in the first preferred embodiment.
Figure 3 is a plan of one of the cushioning units of the packaging material in the first preferred embodiment .
Figure 4 is a plan of the cushioning medium passage of one of the cushioning units of the packaging material in the first preferred embodiment.
Figure 5 is a sectional view of one of the cushioning medium storage portions of the packaging material in the first preferred embodiment.
Figure 6 is a sectional view of one of the cushioning medium storage portions of a comparative packaging material.
Figure 7 is a perspective view of a roll of packaging material in the first preferred embodiment, which is on a metallic rod K2. Figure 8 is a perspective view of a folded piece of packaging material in the first preferred embodiment, showing the method for wrapping a cartridge with the packaging material.
Figure 9 is a plan of the folded piece of packaging material in the first preferred embodiment, showing the method for wrapping a cartridge with the packaging material.
Figure 10 is perspective view of the folded piece of packaging material in the first preferred embodiment, showing the method for wrapping a cartridge with the packaging material.
Figure 11 is a plan of one of the cushioning units of the packaging material in the first preferred embodiment .
Figure 12 is a sectional view of one of the cushioning units of the packaging material in the first preferred embodiment.
Figure 13 is a sectional view of one of the cushioning medium storage portions of the packaging material in the first preferred embodiment.
Figure 14 is a sectional view of one of the cushioning medium storage portions of the comparative packaging material.
Figure 15 is a plan of one of the cushioning medium storage portions of the packaging material in the third preferred embodiments. Figure 16 is a plan of the cushioning medium passage of one of the cushioning units of the packaging material in the third preferred embodiment.
Figure 17 is a plan of the packaging portion proper of the packaging material in the fourth preferred embodiment.
Figure 18 is a sectional view of one of the cushioning units of the packaging material in the fourth preferred embodiment.
Figure 19 is a cross-sectional view of the cushioning medium storage portion of one of the cushioning units of the packaging material in the fourth preferred embodiment. Figures 20 (a) - 20 (c) are plans of the cushioning medium passage of the check valve of the cushioning units of the packaging material in the fifth preferred embodiment . Figures 21 (a) and 21 (b) are plans of the cushioning medium passage of the check valve of one of the cushioning units of the packaging material in the fifth preferred embodiment.
Figures 22 (a) and 22 (b) are plans of the cushioning medium passage of the check valve of one of the cushioning units of the packaging material in the fifth embodiment.
Figure 23 is a perspective view of the sealed packaging material in accordance with the present invention, which contains a cartridge.
Figure 24 is a perspective view of the sealed packaging material in accordance with the present invention, which contains a cartridge.
[BEST MODE FOR CARRYING OUT THE INVENTION]
[Embodiment 1] (Packaging Material Structure)
Referring to Figures 1 and 2, a packaging material Sl in this embodiment is made up of two pieces 1 and 2 of flexible plastic film, which are thermally welded in layers. The areas 6, 8, and 9 are the areas of the two films 1 and 2, by which the two films 1 and 2 are welded. The packaging material Sl has multiple cushioning medium storage portions 3, which are placed side by side. Each cushioning medium storage portion 3 is enabled to store cushioning medium, which in this embodiment is air. It is formed by welding the two flexible films 1 and 2 (which hereafter will be referred to simply as films 1 and 2) across the welding areas 8, 6, and 9. It is rectangular, with its longer edges being substantially longer than its shorter edges. Further, each cushioning medium storage portion 3 is separated from the next cushioning medium storage portions by the welding areas 9. One of the lengthwise ends of the packaging material Sl is provided with multiple cushioning medium entrances 5 for guiding the external air into each of the multiple cushioning medium storage portions 3 to inflate the cushioning medium storage portions 3. Further, the outward end of each of the cushioning medium (air) entrance 5 is provided with an air injection opening 11. Each air entrance 5 is separated from the next ones by the welding areas 7. The welding areas 9 are roughly parallel to the lengthwise direction of the cushioning medium storage portion 3, whereas the welding areas 6 and 8 extend in the direction intersectional to the lengthwise direction of the cushioning medium storage portion 3. The welding area 6 is on the opposite lengthwise end of the packaging material Sl from where the abovementioned air entrances 5 are present. The films 1 and 2 in this embodiment are flexible, and have three layers. That is, each film is formed by sandwiching a Nylon layer with polyethylene and polypropylene layers. The Nylon layer is very difficult for the cushioning medium to flow through, whereas the polyethylene and polypropylene layers are easy to thermally weld together. The first lengthwise end of each cushioning medium storage portion 3 is provided with a check valve 4, which is positioned across the border between the cushioning medium storage portion 3 and the corresponding cushioning medium entrance 5. This check valve 4 is for allowing the air to pass only in the direction to enter the cushioning medium storage portion 3. That is, once the air is introduced into the cushioning medium storage portion 3, the check valve 4 utilizes the air pressure in the cushioning medium storage portion 3 to prevent the air in the cushioning medium storage portion 3 from flowing backward, that is, toward the air entrance 5, as shown in Figure 2, which is a sectional view of one of the cushioning units of the packaging material Sl, at Line B-B in Figure 1. Figure 3 is an enlarged sectional view of the combination of the cushioning medium storage portion 3 and corresponding air entrance 5. The details of the structure of the check valve 4 are as shown in Figures 2 and 3. The check valve 4 is manufactured through the following steps. To the film 2, the top and bottom check valves 4a and 4b are thermally welded in advance by the welding areas 12a - 12c. Incidentally, the top and bottom check valves 4a and 4b are also formed of plastic film.
Referring again to Figures 1 and 2, when the films 1 and 2 are welded to each other to form the packaging material Sl, the top check valve 4a is attached to the air entrance portion (5) of the film 1 by the welding area 10, whereas the bottom check valve 4b is attached to the film 2 by the welding area 10. The top check valve 4a is provided with a seal portion 4al, which is coated or printed on the top check valve 4a. The seal portion 4al is formed of a material which does not melt at the temperature level at which the two films 1 and 2 are welded across the welding areas 8 and 10. Therefore, even if heat is applied to the films 1 and 2 across the welding area 10, it does not occur that the top and bottom check valves 4a and 4b become welded to each other. Further, even in the welding areas 8, which is the border area between the air entrance 5 and cushioning medium storage portion 3, the portions of the top and bottom check valves 4a and 4b, across which the sealing portion 4al is present, do not become welded to each other. Therefore, an air passage Pl, which allows the external air to enter the cushioning medium storage portion 3 through the air entrance 5, remains secured. Incidentally, the sealing portion 4al may be coated or printed on the bottom check valve 4b instead of the top check valve 4a. Even if the sealing portion 4al is attached to the bottom check valve 4b, its functions and performance remains the same.
The lengthwise direction of the cushioning medium storage portion 3 is roughly the same as the direction in which the air passes through the check valve 4, enabling therefore the air to be efficiently introduced into the cushioning medium storage portion 3. Next, referring to Figure 1, the width Wl of each of the air injection openings 11 is narrower than the width W2 of the border area (connective area) between the cushioning medium storage portion 3 and air entrance 5. Further, the multiple air injection openings 11 are positioned so that there is virtually no gap between the adjacent two air injection openings 11, making it possible to reduce in size the air injecting portion of an air injecting apparatus (unshown) for injecting the air into all the air injection openings 11 at the same time. Further, the direction in which the cushioning medium passes through the check valve 4 toward the cushioning medium storage portion 3 is made roughly the same as the direction in which the cushioning medium is introduced through the air injection openings. Therefore, the air is efficiently introduced into the cushioning medium storage portion 3. Further, because of the above- described structural arrangement, the welding area 7 between the adjacent two air injection openings 11 is tilted, relative to the lengthwise direction of the cushioning medium storage portion, from the border area between the cushioning medium storage portion 3 and the corresponding air entrance 5 toward the central air injection opening 11. (Detailed Description of Check Valve Structure)
Here, the welding areas 12a - 12c, across which the top and bottom check valves 4a and 4b are thermally welded to the film 2 will be described regarding their shapes.
Referring to Figure 4, a cushioning medium (air) passage 20 for introducing air into the cushioning medium storage portion 3 is formed by thermally welding the top and bottom check valves 4a and 4b to the film 2 across the welding areas 12a - 12c. Obviously, the width of the cushioning medium (air) passage 20 is less than the width of the check valves 4a and 4b. Referring to Figure 5, the cushioning medium (air) passage 20 is formed between the top and bottom check valves 4a and 4b, and it is also obvious that the width of the cushioning medium (air) passage 20 is less than that of the cushioning medium storage portion 3. That is, as air passes through the cushioning medium (air) passage 20, the top check valve 4a becomes shaped as drawn with double-dot chain lines in Figure 5, which is a sectional view of one of the multiple cushioning units, at Plane A-A in Figure 3. Referring to Figure 4, the cushioning medium (air) passage 20 has a primary portion 20c, and wide portions 20a and 20b. The wide portions 20a and 20b extend from the primary portion 20c in the direction perpendicular to the lengthwise direction of the cushioning medium storage portion 3.
The primary portion 20c of the cushioning medium passage 20 is formed in the direction parallel to the lengthwise direction of the cushioning medium storage portion 30. It is the cushioning medium passage for guiding air in the lengthwise direction of the cushioning medium storage portion, and is less in width than the check valves 4a and 4b. It is formed by the welded areas 12al, 12a2, 12aβ, and 12alO, and welding areas 12bl, 12b2, 12b6, and 12blO, respectively. Further, the wide portions 20a are formed of the portions 12a3 - 12a5, and portions 12a7 - 12a9, of the welded portion 12a, which extend in the direction intersectional to the lengthwise direction of the cushioning medium storage portion 3. Further, the wide portions 20b are formed of the portions 12a3 - 12b5, and portions 12b7 - 12b9, of the welded portion 12b, which extend in the direction intersectional to the lengthwise direction of the cushioning medium storage portion 3. The presence of these wide portions 20a and 20b ensures that the check valves 4a and 4b remain airtightly in contact with each other even after the entering of air into the cushioning medium storage portion 3, preventing thereby the air from flowing backward.
Figure 6 is a cross-sectional view of the cushioning medium storage portion 103 of a comparative packaging material, the cushioning medium passage of which does not have the wide portions. As the cushioning medium storage portion 103 is filled with air, the films 101 and 102 become arcuate in such a manner that the films 102 and 101 are smallest and largest, respectively, in curvature, as shown in Figure 6. However, the top and bottom valves 104a and 104b are welded in advance while the film 102 is flat, as described above. Thus, as the cushioning medium storage portion 3 is filled with air, the portions 104al and 104bl of the top and bottom check valves 104a and 104b, respectively, are made loose from the film 102 and bend inward of the cushioning medium storage portion 3. As a result, the state of contact between the top and bottom check valves 104a and 104b becomes less airtight.
Referring to Figure 4, in order to prevent the occurrence of the above-described problem, the packaging material in this embodiment is provided with welded portions 12a3, 12a5, 12a7, 12a9, 12b3, 12b5, 12b7, and 12b9. The provision of the abovementioned welded portions, which extend in the direction intersectional to the lengthwise direction of the cushioning medium storage portion 3 generates such a force that works in the direction intersectional to the lengthwise direction of the cushioning medium storage 3, that is, the direction to extend the top and bottom check valves 4a and 4b in the direction intersectional to the lengthwise direction of the cushioning medium storage 3. Therefore, the top and bottom check valves 4a and 4b are not made loose like the portions 104al and 104bl of the top and bottom check valves 104a and 104b of the comparative packaging material (Figure 6) as shown in Figure 5. Therefore, it is ensured that the top and bottom check valves 4a and 4b remain airtightly in contact with each other. In this embodiment, the cushioning medium passage 20 is provided with two wide portions 20a and 20b on each side of the primary portion 20c. However, the wide portion count on each side may be only one. Further, there is a regulating portion 12c on the downstream side of the outlet 20cl of the primary portion 20c of the cushioning medium passage 20. The regulating portion 12c turns the air low so that the air flows in the widthwise direction of the cushioning medium storage portion 3. It is also formed by welding in advance the top and bottom check valves 4a and 4b to the film 2. The regulating portion 12c, which is formed by welding, also extends in the direction intersectional to the lengthwise direction of the cushioning medium storage portion 3. Therefore, it also functions to ensure that the top and bottom check valves 4a and 4b remain airtightly in contact with each other. With the regulating portion 12c being structured as described above, as the external introduced through the air entrance 5 is smoothly filled into the cushioning medium storage portion 3; the provision of the regulating portion 12c does not interfere with the efficiency with which the external air is introduced into the cushioning medium storage portion 3. Further, since the regulating portion 12c changes the direction of the air flow on the downstream side of the outlet 20cl of the primary portion 20c of the cushioning medium passage 20 so that the air flows in the widthwise direction of the cushioning medium storage portion 30, it improves the check valves 4 in terms of the prevention of the back flow of the air from the cushioning medium storage portion 3. (Method for Wrapping Cartridge with Packaging Material)
Hereafter, referring to Figures 7 - 13, the method for wrapping a process cartridge, which is removably mountable in the main assembly of an electrophotographic image forming apparatus, with the packaging material S will be described. Here, an electrophotographic image forming apparatus is an apparatus for forming an image on recording medium, with the use of an electrophotographic image forming method. The examples of an electrophotographic image forming apparatus include an electrophotographic copying machine, an electrophotographic printer (laser beam printer, LED printer, etc., for example), a facsimile apparatus, a wordprocessor, etc. A process cartridge is a cartridge in which at least one processing means among a charging means, a developing means, and a cleaning means, and an electrophotographic photosensitive member, are integrally disposed, and which is removably mountable in the main assembly of an image forming apparatus. (1) Separation of Packaging Material Sl from Roll of Packaging Material S by Cutting
The packaging material Sl, that is, a piece of packaging material S, which is wide enough to completely wrap (package) a process cartridge 35 (which will be described later) , is cut away from a long roll of packaging material S, which is made up of multiple packaging units having the above described cushioning medium storage portion, check valve 4, and cushioning medium (air) entrance 5. In the case of the packaging material S in this embodiment, a pair of scissors Kl is used to cut the packaging material S to obtain the packaging material Sl with a proper width. However, a cutter, or a cutting apparatus dedicated to the cutting of the packaging material S, may be used to cut the packaging material S. There is a metallic rod K2 in the center of the roll of packaging material S, making it easier to unroll the roll of packaging material S by a necessary length, and also, to cut the packaging material S. Moreover, the presence of the metallic rod K2 makes it easier to set the roll of packaging material S in a preset position of the automatic cutting machine or the like, to cut the packaging material S. (2) Processing of Packaging Material Sl into Pouch (Figures 8 - 10)
After the cutting of the packaging material Sl away from the roll of the packaging material S, the packaging material Sl is folded in half roughly at the center line in terms of the lengthwise direction of the cushioning medium storage portion 3 so that the rear end portion 53 of the cushioning medium storage portion 3, in terms of the lengthwise direction of the cushioning medium storage portion 3, is placed in the position shown in Figure 8.
Then, the top and bottom layers of the folded packaging material Sl are thermally welded together along both edges (welding areas 12 and 13) in terms of the direction perpendicular to the lengthwise direction of the cushioning medium storage portion 3, as shown in Figure 9. As a 'result, the packaging material Sl becomes a pouch, which is open at one of its lengthwise ends. The welding areas 12 and 13 extend in the lengthwise direction of the cushioning medium storage portion 3.
(3) Insertion of Cartridge 35 (Object to be Packaged) into Pouch Made of Packaging Material Sl (Figure 10) Referring to Figure 10, the cartridge 35, which is the object to be packaged, is to be inserted into the pouch through an opening with which one of the lengthwise end of the pouch is provided. That is, the cartridge 35 is inserted so that its lengthwise direction matches the lengthwise direction of the cushioning medium storage portion 3.
Then, the opening 18 is sealed by thermally welding the top and bottom layers of the packaging material Sl across the welding area 14, as shown in Figure 23, to prevent the cartridge 35 from popping out of the pouch during the cartridge shipment. The location of the welding area 14 is to be selected so that its position overlaps with the sealing portion 4al, which was described referring to Figure 2. Welding the top and bottom layers of the packaging material Sl so that the welding seam runs across the sealing portion 4al makes it possible to inject the cushioning medium into the cushioning medium storage portion 3 even after the closing of the opening 18. (4) Injection of Cushioning Medium (Figure 9)
Thereafter, the air, which is the cushioning medium in this embodiment, is to be injected into all the cushioning medium storage portions 3 through the cushioning medium injection openings 11 of the cushioning medium (air) entrances 5; the air is introduced into each of the cushioning medium storage portions 3 through the corresponding check valve 4. The reason why the air is introduced after the placement of the cartridge 35 in the pouch made of the packaging material Sl is that the air introduction into each cushioning medium storage portion 3 inflates the cushioning medium storage portion 3, which in turn reduces the pouch in internal measurements, which in turn makes it virtually impossible to insert the cartridge 35 into the pouch. In other words, by injecting the air into the cushioning medium storage portions 3 after the insertion of the cartridge 35 into the pouch, the cartridge 35 is securely held in the pouch. Incidentally, in this embodiment, it is air that is introduced as the cushioning medium into the cushioning medium storage portions 3. However, the cushioning medium selection does not need to be limited to the air. That is, the cushioning medium may be nitrogen gas, oxygen gas, or the like. Nitrogen gas may be a good choice because nitrogen is large in molecular weight, being therefore unlikely to leak from the cushioning medium storage portion 3, which is made of plastic film or the like. Further, the cushioning medium may be a liquid or a fluid substance other than gaseous substances.
Next, referring to Figure 24, lastly, the cushioning medium (air) entrances 5 and cushioning medium storage portions 3 are to be completely sealed by welding shut the cushioning medium injection opening 11 (Figures 11 and 19) across the welding area
15.
[Embodiment 2]
(Packaging Material Structure) In the first preferred embodiment, the check valve 4 had two portions, that is, the top and bottom check valves 4a and 4b. In this embodiment, however, the check valve 4 has only one valve 4d.
Figure 11 is a plan of one of the multiple cushioning units of packaging material Sl, as seen from the direction perpendicular to the lengthwise direction of the unit. It shows the central cushioning medium entrance 5 and corresponding cushioning medium storage portion 3. Figure 12 is a sectional view of one of the multiple cushioning units of packaging material Sl, shown in Figure 11, at Plane C-C in Figure 11, after the introduction of the air into the unit .
Referring to Figure 11, the film 2 has the check valve 4d, which was welded in advance to the film 2 by thermally melting the film 2 across welding areas 12a - 12c.
More specifically, referring to Figures 11 and 12, when the films 1 and 2 are welded to each other to create the packaging material S, the check valve 4d is welded to the film 2 across the welding area 10, in the cushioning medium entrance 5. The check valve 4d has a sealing portion 4dl made up of a material which does not melt even at the temperature level at which the films 1 and 2 are thermally welded to each other across the welding areas 8 and 9. The sealing portion 4dl is coated or printed on the check valve 4d.
Therefore, even if heat is applied to the films 1 and 2 across the welding area 10, it does not occur that the check valve 4d and film 2 becomes welded to each other. Further, even across the welding area 8, which is the border between the cushioning medium (air) entrance 5 and cushioning medium storage portion 3, it does not occur that the check valve 4d becomes welded to the film 2, making it possible to secure a passage P2 through which the air is allowed to enter the cushioning medium storage portion 3 from the cushioning medium (air) entrance 5. This sealing portion 4dl does not need to be a part of the check valve 4d; it may be coated or printed on the film 2. Even if the sealing portion 4dl is made as a part of the film 2, its functions remain the same. (Detailed Description of Check Valve Structure) The welding areas 12a - 12c, across which the check valve 4d is thermally welded to the film 2 are the same in shape as those in the first preferred embodiment. As the check valve 4d is thermally welded to the film 2 across the welding areas 12a - 12c, a passage 20 for introducing the air into the cushioning medium storage portion 3 is formed between the check valve 4d and film 2. Referring to Figure 13, the width of this passage 20 is obviously less than that of the cushioning medium storage portion 3, and is formed between the check valve 4d and the film 2. That is, when the air passes through the passage 20, the check valve 4d becomes shaped as indicated by a pair of double-dot chain lines as shown in Figure 13, which is a cross-sectional view of the single cushioning unit, at Plane D-D in Figure 11.
Figure 14 is a cross-sectional view of the cushioning medium storage portion 203 of a comparative packaging material, the cushioning medium passage portion of which has no wide portion. As the cushioning medium storage portion 203 is filled with the air, the films 201 and 202 are arcuately bent as shown in Figure 14, in such a manner that the film 202 and check valve 204d become smallest and largest, respectively, in curvature. However, the check valve 204d is welded in advance when the film 202 is flat, as described before. Therefore, as the cushioning medium storage portion 203 is filled with the air, the check valve 204d is made to loosely bent inward of the cushioning medium storage portion 203 across its portion 204dl. As a result, the check valve 204d fails to remain airtightly in contact with the film 202. In order to prevent the occurrence of this problem, the films 1 and 2 in this embodiment are welded to each other across the welding areas 12a3, 12a5, 12a7, 12a9, 12b3, and 12b5, 12b7, and 12b9 of each of the cushioning units of the cushioning material, as the films 1 and 2 in the first preferred embodiment are welded to each other as shown in Figure 4. The provision of the welded portions which extend in the direction intersectional to the lengthwise direction of the cushioning medium storage portion 3 generates such a force that works in the direction to extend the check valve 4 in the direction intersectional to the lengthwise direction of the cushioning medium storage portion 3. Thus, the provision of the welded portions can keep the interface between the check valve 4 and film 2 airtightly sealed as shown in Figure 13; it prevents the formation of loose portions, such as those formed in the case of the comparative example as shown in Figure 14. In other words, it keeps the check valve 4d and film 2 airtightly in contact with each other. The other structural features and effects are the same as those of the packaging material in the first preferred embodiment . [Embodiment 3] (Packaging Material Structure)
In the first preferred embodiment, there was only one cushioning medium passage 20. The third preferred embodiment is characterized in that each cushioning unit is provided with two cushioning medium passages 21 and 22. Referring to Figures 15 and 16, the patterns of the welding areas 24a - 24c across which the check valve 4e is thermally welded to the film 2 are such that each cushioning unit is provided with the two cushioning medium passages 21 and 22, which are positioned side by side. However, the central welding area 24b is integration of the welding areas 12a and 12b in the first preferred embodiment, and is shaped as such.
To describe in more detail, the primary portion 21c of the passage 21 is created by welded portions 24al, 24a2, 24aβ, and 24alO, and welded portions 24bl, 24b2, 24b6, and 24blO. The primary portion 22c of the passage 22 is created by welded portions 24cl, 24c2, 24cβ, and 24clO, and welded portions 24bl, 24b2, 24bβ, and 24blO. Thus, in order to form this wide portion 21b of the passage 21, the welding area 24a is made up of portions 24a3 - 24a5, and portions 24a7 - 24a9, whereas the welding area 24b is made up of portions 24b3 - 24b5, and portions 24b7 - 24b9. Further, in order to form the wide portions 22b of the passage 22, the welding area 24c is made up of portions 24c3 - 24c5, and portions 24c7 - 24c9, and the welding area 24b is provided with portions 24b3 - 24b5, and portions 24b7 - 24b9.
Further, the check valve 4e is welded across the areas 23cl and 23c2, which are on the downstream end sides of the primary portion 21c and 22c, respectively, creating a pair of cushioning medium flow regulating portions 23cl and 23c2. The provision of two cushioning medium passages 21 and 22 improves each cushioning unit in cushioning medium injection efficiency. Incidentally, the number of the cushioning medium passages does not need to be limited to two; it may be three or more.
The other structural features of this embodiment of packaging material in accordance with the present invention are the same as those of the first preferred embodiment . [Embodiment 4]
(Packaging Material Structure) Figure 17 is a plan of one of the multiple cushioning units of the packaging material, as seen from above. Figure 18 is a sectional view of one of the multiple cushioning units of the packaging material, which is inflated with air, at Plane H-H in Figure 17. Figure 19 is a sectional view of one of the multiple cushioning units of the packaging material, which is inflated with air, at Plane G-G in Figure 17. The reason why the check valve in this preferred embodiment is made up of a top check valve 4f and a bottom check valve 4g is the same as the check valve in the first preferred embodiment is made up of the top and bottom check valves 4a and 4b. Further, the manner in which the top and bottom check valves 4f and 4g are thermally welded in advance to the film 2 across the welding areas 12a - 12c of the cushioning medium storage portion 3 is the same as the manner in which the top and bottom check valves 4a and 4b are thermally welded to the film 2 in the first preferred embodiment . The fourth preferred embodiment is different from the first preferred embodiment only in that the packaging material in the fourth embodiment is not provided with a cushioning medium entrance passage, and that the top and bottom check valves 4f and 4g themselves have the function of the cushioning medium entrances. That is, the top and bottom check valves 4f and 4g are welded to the film 2 not only across the welding areas 34a - 34c, but also, across the welding areas 34d - 34e, being thereby provided with a cushioning medium (air) injection opening 34g. Thus, the air is directly injected into the top and bottom check valves 4g and 4g. Therefore, the packaging material in this embodiment is superior in cushioning medium injection efficiency to those in the preceding embodiments .
The shape of the cushioning medium (air) passage 34f is the same as that in the first embodiment. [Embodiment 5]
The fifth preferred embodiment is different from the preceding embodiments in the shape of the cushioning medium passage. The various shapes for the cushioning medium passage in the fifth embodiments are shown in Figures 20 - 22. Basically, each of the primary portions 25d - 32d of cushioning medium passages 25 - 32, respectively, is made parallel to the lengthwise direction of the cushioning medium storage portion 3. It is the passage formed between two check valves, or between a check valve and film 2, to guide the air in the lengthwise direction of the cushioning medium storage portion 3. Each of the cushioning medium passages 25 - 32 in this embodiment is provided with portions wider than the primary portions 25d - 32d. In order to form these wider portions, the check valve is welded to the film 2 across the welding areas, which extend in the directions intersectional to the lengthwise direction of the cushioning medium storage portion 3. Further, cushioning medium flow regulating portions 25c - 32c for causing the air to flow in the widthwise direction of the cushioning medium storage portion 3 are provided on the downstream side of the outlet of the primary portions 25d - 32d. These cushioning medium flow regulating portions 25c - 32c are also formed by welding the check valve, or check valves, to the film 2. They are also provided with the portions which extend in the direction intersectional to the lengthwise direction of the cushioning medium storage portion. When manufacturing the packaging material for a process cartridge by welding two pieces of film together, devising in pattern the area, or areas, of one of the films, across which the check valve, or check valves, are welded, can make it difficult for the cushioning medium to leak from the cushioning medium storage portion, and also, can make it easier for the cushioning medium to be injected into the cushioning medium storage portion. Further, it makes it simpler to form the check valve.
[INDUSTRIAL APPLICABILITY] According to the present invention, it is possible to provide a process cartridge packaging material, which is different from conventional process cartridge packaging materials in the pattern in which a check valve is welded to each of its cushioning medium storage portions, and also, is superior to conventional process cartridge packaging materials, in the efficiency with which cushioning medium can be injected into the cushioning medium storage portions. While the invention has been described with reference to the structures disclosed herein, it is not confined to the details set forth, and this application is intended to cover such modifications or changes as may come within the purposes of the improvements or the scope of the following claims.

Claims

1. A packing member for packing an article, said packing member comprising: a medium accommodating portion accommodating medium; a non-return valve for passing the medium toward said medium accommodating portion along a longitudinal direction of said medium accommodating portion and for stopping the medium in an opposite direction away from said medium accommodating portion; and a flow path, formed by welding said non-return valve to said medium accommodating portion, for passing the medium, said flow path including a reference flow path portion extending in the longitudinal direction and an expanded flow path portion having a width larger than that of said reference flow path portion.
2. A packing member according to Claim 1, further comprising a regulating portion which is provided downstream of said flow path with respect to a flow direction toward said medium accommodating portion and which is formed by welding said non-return valve to said medium accommodating portion, said regulating portion having a width larger than that of said reference flow path portion, said regulating portion being effective to change a flow direction of the medium having passed through said flow path to a widthwise direction of said medium accommodating portion.
3. A packing member according to Claim 1, wherein said non-return valve includes two flexible sheets and welded to said medium accommodating portion, and the medium is flowable between said two sheets.
4. A packing member according to Claim 1, wherein said non-return valve includes one flexible sheet welded to said medium accommodating portion, and the medium is flowable between said flexible sheet and said medium accommodating portion.
5. A packing member according to Claim 1, wherein a plurality of such said expanded flow path portions arranged in a direction crossing with the longitudinal direction in said flow path.
6. A packing member according to Claim 1, wherein a plurality of such said expanded flow path portions arranged in the longitudinal direction in said flow path. 7, A packing member according to Claim 1, wherein a plurality of such flow paths are arranged in a direction crossing with the longitudinal direction.
EP09737478.9A 2008-09-19 2009-09-18 Packing material Not-in-force EP2340218B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008241019A JP2010070232A (en) 2008-09-19 2008-09-19 Packing member
PCT/JP2009/066876 WO2010032883A1 (en) 2008-09-19 2009-09-18 Packing material

Publications (2)

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EP2340218A1 true EP2340218A1 (en) 2011-07-06
EP2340218B1 EP2340218B1 (en) 2015-01-14

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EP09737478.9A Not-in-force EP2340218B1 (en) 2008-09-19 2009-09-18 Packing material

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US (2) US20100072103A1 (en)
EP (1) EP2340218B1 (en)
JP (1) JP2010070232A (en)
CN (1) CN102159470B (en)
WO (1) WO2010032883A1 (en)

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Publication number Publication date
CN102159470B (en) 2013-01-02
CN102159470A (en) 2011-08-17
EP2340218B1 (en) 2015-01-14
US20140326632A1 (en) 2014-11-06
JP2010070232A (en) 2010-04-02
US20100072103A1 (en) 2010-03-25
WO2010032883A1 (en) 2010-03-25

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