WO2007145394A1

WO2007145394A1 - Packing pack

Info

Publication number: WO2007145394A1
Application number: PCT/KR2006/003099
Authority: WO
Inventors: Sang Hi Kim
Original assignee: Lee, Jin Young; Kim, Mi Jin
Priority date: 2006-06-16
Filing date: 2006-08-07
Publication date: 2007-12-21
Also published as: KR100763641B1

Abstract

Disclosed is a packing pack. It comprises a first secondary material sheet provided on a valve film, a second secondary material sheet provided on the opposite side of the valve film with respect to the first secondary material sheet to face the first secondary material sheet, and being shorter than the first secondary material sheet, a middle air packet formed by a packing film in contact with the valve film on which the second secondary material sheet is provided and charged with air by receiving air through the second secondary material sheet, and an air charging portion formed between the valve films by a third secondary material sheet perpendicular to the first secondary material sheet and disposed between two rows of air pockets. The packing pack can reduce raw material cost by effectively using a middle portion of the packing pack because two outer rows of air pockets and middle air pockets are formed in a single air supply step, and can enhance packing efficiency because three air pockets are formed at one time. Further, it can be formed to have a variety of shapes because the sizes of the outer air pockets and the middle air pockets can be individually adjusted. Thus, the packing pack can be used to pack objects having a variety of shapes. Also, it can reduce air leakage because the middle air pockets clog the air charging portion, in which air leakage is generally caused.

Description

PACKING PACK

Technical Field

[1] The present invention relates to a packing pack serving as a shock absorbing packaging material and having air pockets formed by charging both packing films and valve films of the packing pack with air.

[2]

Background Art

[3] Conventional shock absorbing packaging material used to be Styrofoam because it is elastic and light. However, the use of Styrofoam is decreasing nowadays in order to reduce environmental pollution. As a substitute for Styrofoam, an air bag comprising a packing film and a valve film, which are seamed to form many air pockets charged with air, is used. Such an air bag has a disadvantage in that all of the air pockets consecutively burst when one air pocket bursts because the pressure increases at an air inlet portion.

[4] In order to solve this problem, a conventional packing pack is disclosed in Korean

Patent Application No. 10-0011704, filed on February 12, 2005.

[5] FIG. 1 and FIG. 2 illustrate the conventional packing pack. Referring to FIG. 1 and

FIG. 2, the conventional packing pack has a secondary material sheet 110, made of a material different from the material of the air pockets 103 and having a size smaller than the width of each air pocket 103 in order to reduce the leakage of air charged in the air pockets 103. The secondary material sheet 110 serves as an air inlet and is used to inject air into each of the air pockets 103. Each of the intersections of vertical seamed lines 106 has a semicircular shape.

[6] In order to form the air pockets 103 having the secondary material sheets 110 serving as air inlets and arranged in two corresponding rows, inner lines 112 are formed by seaming the valve films in a heat melting manner. The outer surfaces of the valve films 102 and 102a and the inner surfaces of the packing films 101 and 101a are bonded, respectively, by a bonded line 109. In the middle portion of the air bag, that is, between the two rows of air pockets 103, an air charging portion 111 is defined by the inner lines 112.

[7] As described above, the conventional air bag 200 has an air charging portion 111, which is a space for charging air, and air is introduced into the air charging portion 111 through an air inlet 108 provided at an end of the air charging portion 111. When the air charging portion 111, provided in the middle portion of the air bag 200, is fully charged with air, the air in the air charging portion 111 moves into the respective air pockets 103 provided on both sides of the air charging portion 111, thereby finally filling the air pockets 103. If the input of air is stopped when the air pockets 103 are fully filled with air, air in the air charging portion 111 leaks through the air inlet 108, but, thanks to the valve films 102 and 102a, air in the air pockets 103 does not leak, so that the air pockets 103 remain fully charged with air, and the air bag can serve as a shock absorbing member.

[8] However, in the case in which the air bag 200 is used to pack an object with the front surface, the back surface, the upper surface, the lower surface, and the side surfaces which are different sizes, a plurality of air bags 200 having air pockets 103 in which air pockets 103 of respective air bags 200 have a variety of sizes must be manufactured because the air pockets 103 in one air bag 200 have the same size, and the air bags 200 are bound to each other so as to correspond to the size of each surface of the object. Accordingly, packing efficiency is decreased and the cost of manufacturing packing packs is increased.

[9] Further in the case in which packing material is manufactured by binding a plurality of the air bags 200 in a manner such that the packing material has a size corresponding to the size of an object to be packaged, the air bag 200 may be folded at the air charging portion 111, which is thus not charged with air. In this instance, if corners of cubical or rectangular parallelepiped objects come into contact with the air charging portion 111, which is not filled with air, damage can be caused to the corners of the packed object.

[10] Still further, the air charging portion 111, acting to supply air into the air pockets

103, must have a predetermined size in order to supply air into the air pockets 103. That is, since the conventional air bag 200 has an air charging portion 111 which is not charged with air, raw material of the air bag 200 is wasted.

[H]

Disclosure of Invention Technical Problem

[12] Accordingly, the present invention has been devised in consideration of the aforementioned problems and situations, and it is an object of the present invention to provide a packing pack that can reduce raw material cost because air is supplied into a middle air pocket and both outer air pockets arranged at respective sides of the middle air pocket by a single air supply operation, and that effectively uses a center portion of the packing pack because even the center portion of the packing pack is charged with air, and that enhances packing efficiency because three air pockets are formed at one time.

[13] It is a further object of the present invention to provide a packing pack that can be used to pack objects having a variety of shapes because it can be formed into a variety of shapes by adjusting the sizes of outer air pockets and a middle air pocket according to the size of the object to be packaged, and can reduce air leakage because the middle air pocket clogs an air charging portion from which air typically leaks.

[14]

Technical Solution

[15] In order to achieve the above objects and advantages, according to one aspect of the present invention, there is provided a packing pack, comprising a first secondary material sheet provided on a valve film, a second secondary material sheet, which is provided on the valve film at the opposite side of the first secondary material sheet to face the first secondary material sheet, and which is shorter than the first secondary material sheet, a middle air packet which is formed by a packing film in contact with the valve film on which the second secondary material sheet is provided and which is charged with air by receiving air through the second secondary material sheet, and an air charging portion formed between the valve films by a third secondary material sheet perpendicular to the first secondary material sheet and disposed between two rows of air pockets. Brief Description of the Drawings

[16] Advantages and features of the present invention may be understood more readily with reference to the accompanying drawings, but the present invention should not be construed as being limited to the accompanying drawings. Further, the simple modification and replacement of elements of the present invention may be understood as being included within the scope of the present invention.

[17] FIG. 1 is a front view illustrating a packing pack according to the conventional art;

[ 18] FIG. 2 is an enlarged view illustrating a valve film of the packaging material according to the conventional art; FIG. 3 is a front view illustrating a packing pack according to one embodiment of the present invention;

[19] FIG. 4 is an enlarged view illustrating the packing pack according to the embodiment of the present invention;

[20] FIG. 5 is a sectional view illustrating air flow in air pockets and a middle air pocket of the packing pack according to the embodiment of the present invention;

[21] FIG. 6 is an enlarged view illustrating the part of a secondary material sheet that serves as an air inlet, of the packing pack according to an embodiment of the present invention;

[22] FIG. 7 is an enlarged view illustrating the part of a secondary material sheet that serves as an air inlet for air pockets and a secondary material sheet serving as an air inlet for an air charging portion; [23] FIG. 8 is an enlarged view illustrating a middle air pocket of the packing pack according to the embodiment of the present invention; and

[24] FIG. 9 is a sectional view illustrating the air pockets in a state fully charged with air.

[25]

Best Mode for Carrying Out the Invention

[26] Hereinafter, a packing pack according to the present invention will be described with reference to the accompanying drawings.

[27] FlG. 3 is a front view illustrating a packing pack according to one embodiment of the present invention, FlG. 4 is an enlarged view illustrating the packing pack according to the embodiment of the present invention, FlG. 5 is a sectional view illustrating air flow in air pockets and a middle air pocket of the packing pack according to the embodiment of the present invention, FlG. 6 is an enlarged view illustrating part of a secondary material sheet, serving as an air inlet, of the packing pack according to the embodiment of the present invention, FlG. 7 is an enlarged view illustrating part of a secondary material sheet serving as an air inlet for air pockets and a secondary material sheet serving as an air inlet for an air charging portion, FlG. 8 is an enlarged view illustrating a middle air pocket of the packing pack according to the embodiment of the present invention, and FlG. 9 is a sectional view illustrating the air pockets in a state fully charged with air.

[28] Referring to FIGS. 3 to 9, valve films 2 and 2a are disposed between packing films

1 and Ia in an overlapping manner. Ends of the packing films 1 and Ia are bonded to each other, thereby forming a space therebetween. The space is divided into a plurality of air pockets 3 by a plurality of seamed lines 6.

[29] Outer surfaces of the valve films 2 and 2a are attached to inner surfaces of the packing films 1 and Ia, respectively. First secondary material sheets 10 serving as air inlets for air pockets are arranged at regular intervals on a surface of the valve film 2.

[30] The air pockets 3 are arranged in two rows in a manner such that entrances 1 of the air pockets 3 in a first row face respective entrances 1 of the air pockets 3 in a second row. That is, each air pocket 3 in the first row and each air pocket 3 in the second row form a pair. The first secondary material sheets 10 engaging the entrances of the two air pockets forming a pair are connected to each other, thereby having the appearance of a single band.

[31] A plurality of second secondary material sheets 20 serving as air inlets for air charging portions is arranged on the other side of the valve film 2. The second secondary material sheets 20 have the same shape as the first secondary material sheets 10, but each of the second secondary material sheets 20 is provided to one air pocket 3 of one pair.

[32] The length of the second secondary material sheets 20, serving as air inlets for the air charging portion, is less than that of the first secondary material sheets 10.

[33] Two inner lines 12 are formed to intersect the seamed lines 6 at a right angle around the entrances 4 of the air pockets 3. Respective corners of the air pockets 3, disposed at respective intersections of the seamed lines 6 and the inner lines 12, have a semicircular shape, so that stress is not concentrated thereon.

[34] Further, an air charging portion 40 made of secondary material sheet is formed between the valve films 2 and 2a by the two rows of inner lines 12.

[35] In the zone in which the air charging portion 11 is disposed, a middle air pocket 30 is formed between the valve film 2 and the packing film 1.

[36] The operation of the packing pack according to the present invention will be described below.

[37] First, air is injected through an air injection hole 8 using a general air injection tool

(not shown).

[38] In this instance, air pressure must be controlled so that the air pockets 3 are not ruptured by excessive air pressure.

[39] When air injection through the air injection hole 8 is commenced, air is smoothly introduced into the air charging portion 40, made of secondary material sheets disposed between two side air pockets 3. Here, the sequence by which air is introduced into the air pockets 3 is described in detail. Referring to FIG. 6, the air pockets 3 which are not provided with the second secondary material sheets 20 are sequentially charged with air flowing through the entrances 4 thereof from the air pockets 3 nearest the air injection hole 8. In the air pockets 3 fully filled with air, the valve films 2 and 2a are brought into close contact with the packing film Ia, thereby preventing air from leaking. Accordingly, the air pockets 3 remain in a state of being fully filled with air.

[40] Consequently, the air pockets 3 which are not provided with the second secondary material sheets 20 are charged with air from the air pocket 3 nearest the air injection hole 8.

[41] Referring to FIG. 7, the air pockets 3 provided with the second secondary material sheets 20 and disposed to face the air pockets 3 without the second secondary material sheets 20 are charged with air in the same manner as the air pockets 3 without the second secondary material sheets 20.

[42] At this time, the air introduced into the air pocket 3 with the second secondary material sheet 20 flows into the middle air pocket 30 disposed between the packing film 1 and the valve film 2 thanks to the second secondary material sheet 20.

[43] Referring to FIG 5 through FIG 8, air is introduced into the middle air pocket 30 in the following manner. Air in the air pocket 3 provided with the second secondary material sheet 20 circulates through the air pockets 3, thereby filling all of the air pockets 3 sequentially. At this time, the air circulating in the air pockets 3 provided with the second secondary material sheet 20 is introduced into the middle air pocket 30 formed between the valve film 2 and the packing film 1 thanks to the second secondary material sheet 2.

[44] Here, in the state in which the air pockets 3 provided with the second secondary material sheet 20 and the middle air pocket 30 are not fully charged with air, the air pocket 3 and the middle pocket 30 disposed farthest from the air injection hole 8 are charged with air.

[45] This happens for the following reason. The middle air pocket 30 must be fully charged with air because air is introduced into the middle air pocket 30 through the second secondary material sheet 20 from the air pocket 3 provided with the second secondary material sheet 20. However, since the middle air pocket 30 is formed outside the valve film 2 in which the air charging portion 40 made of the first secondary material sheet 41 is formed, the valve films 2 and 2a are never in contact with each other due to the air flowing from the air injection hole 8. Accordingly, even in the state in which the middle air pocket 30 nearest the air injection hole 8 is not fully charged with air, the middle air pocket 30 farthest from the air injection hole 8 can be charged with air.

[46] As described above, when air charging into the middle air pocket 30 farthest from the air injection hole 8 begins, as shown in FlG 8, the middle air pocket farthest from the air injection hole 8 is first fully charged with air because the air introduced into the middle air pocket through the second secondary material sheet 20 pushes the valve films, in which the air charging portion 40 is formed, toward the packing film Ia.

[47] Then, the air charging portion 40 is sequentially closed, so that the air pockets 3 and the middle air pockets 30 are fully charged with air. As a result, production of the packing pack is completed.

[48] For the above-described reason, the air charging portion 40 connected to the air injection hole 8 is sealed, so that air leaking is prevented.

[49] Generally, if inner pressure is increased, the pressure is increasingly concentrated in the corners, so that the packing pack can easily burst. However, according to the present invention, the corners of the packing pack have semicircular shapes due to the inner lines 12 and the seamed lines 6, therefore, it is possible to prevent the corners from bursting due to inner pressure.

[50] Although the preferred embodiment of the present invention has been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claim. [51]

Industrial Applicability

[52] The packing pack according to the present invention can increase packing efficiency because three air pockets, that is, two outer air pockets and a middle air pocket disposed between the outer air pockets, are formed for a single air supply operation, and can reduce raw material cost by effectively using the middle portion of the packing pack.

[53] Further, the packing pack according to the present invention can be used to pack objects having a variety of shapes because it is possible to adjust the sizes of the air pockets and the middle air pocket, respectively. That is, the packing pack according to the present invention can be formed to have a variety of shapes by adjusting the size of the outer air pockets and the middle air pockets. Still further, since the air charging portion, in which air leakage is typically caused, is clogged by the middle air pockets, air leakage can be reduced.

Claims

[1] A packing pack, comprising: packing films, outer edges of which are seamed, and valve films disposed between the packing films, all of the packing films and the valve films being layered, wherein outer ends of the packing films are bonded to each other to form a space, and the space is divided into a plurality of air pockets by a plurality of seamed lines, and wherein outer surfaces of the valve films are attached to respective inner surfaces of the packing firms, secondary material sheets are arranged at regular intervals on the opposite surfaces of the valve films, and an air charging portion connected to an air injection hole is disposed between outer rows of air pockets; a first secondary material sheet provided to the valve films so that air can be introduced into air pockets arranged in respective outer rows through entrances of respective air pockets; a second secondary material sheet provided to the other side of the valve film, on which the first secondary material sheet is provided, and arranged to face the first secondary material sheet, the second secondary material sheet being shorter than the first secondary material sheet; a middle air pocket formed by the packing film in contact with the valve film on which the second secondary material sheet is provided and charged with air in a manner such that air is introduced through the second secondary material sheet; and an air charging portion formed between the valve films by a third secondary material sheet arranged perpendicular to the first secondary material sheet, and disposed between two outer rows of air pockets.