JPH0551743U - Buffered envelope - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To prevent an object from being caught between the air-filled buffer sheet and the inner surface of the envelope when the object is inserted. It also prevents the rigid contents from damaging the seal. [Structure] A plastic film 3 is laminated and integrated on a paper base sheet 2, and an air-filled buffer sheet 4 is superposed on the plastic film 3 side. The envelope forming sheet 1 is used to heat-weld required portions to form an envelope. At this time, the buffer sheet is heat-welded to the surface of the plastic film 3 at the opening edge 10 so that the buffer sheet slightly projects from the envelope opening edge 10.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cushioning envelope.

[0002]

[Prior Art]

 Several envelopes have been proposed that have cushioning properties in order to prevent the contents from being damaged by an external impact force. As a means for imparting cushioning properties to an envelope, it is generally known to bond an air-filled cushioning sheet to the inner surface of the envelope. The air-filled cushioning sheet is a sheet that has a cushioning function by forming a number of independent air-filled portions between two plastic sheets. As a method of joining the sheets to the inner surface of the envelope, an adhesive is used. It is used to attach or heat-bond the peripheral edge portion.

[0003]

[Problems to be solved by the device]

 Since the air-filled cushioning sheet has a certain thickness due to its nature, if the cushioning sheet is present in the opening of the envelope, the sealing condition at the time of bending will be poor and it will be difficult to clip it. A joining method is also considered in which the cushioning sheet is retracted inward from the opening of the envelope by a required width. However, in this case, since the cushioning sheet bulges out from the inner surface of the envelope at the position below the required width of the envelope opening, when the product is caught by the cushioning sheet when the product is inserted and this is repeated, There is a problem in that the cushioning sheet is peeled off, and as a result, the article is easily inserted between the cushioning sheet and the inner surface of the envelope when the article is inserted.

In order to improve this point, a structure having a structure in which the upper edge of a cushioning sheet located below the required width of the opening of the envelope is heat-welded to the inner surface of the envelope (Japanese Utility Model Publication No. 64-1241) has also been proposed. However, it is not perfect, and in the case of insufficient welding, the insert is caught between the cushioning sheet and the inner surface of the envelope, and if this is repeated, the cushioning sheet peels off. could not.

Further, in general, when the envelope content is a hard material such as metal, the content hits the sealed portion during handling after sealing the opening of the envelope, and a part of the sealed portion is damaged. This is also one of the technical problems in this type of envelope, but none of the conventional envelopes provided a solution to this problem.

The present invention has been made in view of the above points, and there is no risk of the article being caught by the cushioning sheet when the article is inserted, and it is possible to prevent the sealing portion from being damaged by the rigid content such as metal. An object is to provide an envelope having a cushioning property.

[0007]

[Means for Solving the Problems]

 The cushioning envelope of the present invention is an envelope forming sheet in which a plastic film is laminated and integrated on a paper base sheet and an air-filled cushioning sheet is superposed on the plastic film side, with one side being continuous or discontinuous. The air-filled buffer sheets are stacked so that they face each other, and the peripheral open edges other than the edges that form the opening of the envelope are joined and integrated by heat welding. At the edge of the envelope opening, the air-filled buffer sheet is attached. Is heat-welded to the surface of the plastic film while slightly protruding from the edge of the opening.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

The envelope of the present invention shown in FIG. 1 is formed in a bag shape using the envelope-forming sheet 1. As shown in FIG. 2, the envelope forming sheet 1 is formed by laminating and integrating a plastic film 3 on a paper base material sheet 2 and superposing an air-filled buffer sheet 4 on the plastic film 3 side. The air-filled cushioning sheet 4 is formed by forming a large number of independent air-filled portions 7 between two plastic sheets 5 and 6, and the cushioning action is exerted by the formed air chambers. The bumper sheet 4 is arranged so that the uneven surface 8 faces the plastic film 3 side so that the uneven surface 8 does not appear on the inner surface of the envelope. It is also possible to further laminate a plastic sheet 9 on the uneven surface 8 side of the cushioning sheet 4 and use a cushioning sheet having both smooth surfaces as shown in FIG.

As the paper base material sheet 2, ordinary paper is used, but synthetic paper or processed paper can also be used. The plastic film 3 may be made of any material as long as it is a thermoplastic resin, and usually a polyolefin resin film, particularly a polyethylene film is used. The material of the buffer sheet 4 may be the same thermoplastic resin as the plastic film 3.

The envelope-forming sheet 1 configured as described above is stacked so that one side is continuous or discontinuous so that the cushioning sheets 4 and 4 face each other. Here, stacking with one side continuous means that one sheet for envelope formation having a length twice the length of the envelope is folded in half so that the cushioning sheets 4 and 4 face each other. And the overlapping with one side being discontinuous means that two envelope forming sheets each having a length corresponding to the length of the envelope face each other with the cushioning sheets 4 and 4 facing each other. It means to superimpose. That is, one sheet may be used and bent to form an envelope, or two sheets may be used and stacked to form an envelope.

After stacking the envelope-forming sheets as described above, the peripheral open edges other than the edge 10 which becomes the opening of the envelope are joined and integrated by heat welding. In the figure, 11 indicates the above-mentioned peripheral open end welded portion. 12 is the opening of the envelope.

At the edge 10 of the envelope opening 12, the cushioning sheet 4 is heat-welded to the surface of the plastic film 3 in a state of slightly protruding from the edge 10. In the figure, 13 indicates a welded portion of the buffer sheet. At the time of heat welding, the welded portion 13 of the cushioning sheet is crushed by the air-filled portion 7, so that the thickness thereof becomes thin. The projecting length of the buffer sheet 4 projecting from the edge 10 of the opening of the envelope is preferably 1 to 25 mm, particularly preferably 2 to 10 mm. Reference numeral 14 denotes a protruding portion of the buffer sheet.

Reference numeral 15 denotes a sealing lid portion provided integrally with the envelope body, and an adhesive coating portion 16 is formed on the lid portion, and a release paper 17 is attached to the adhesive coating portion 16. Has been. The release paper 17 is peeled off, the lid portion 15 is bent and attached to the main body of the envelope for sealing. The present invention is not limited to the structure having the lid 15 for sealing, and an envelope having a structure without the lid 15 may be used.

[0015]

[Action]

 In the envelope of the present invention, since the air-filled cushioning sheet 4 slightly projects at the edge 10 of the envelope opening, the bonding boundary portion of the cushioning sheet 4 (that is, the welding of the cushioning sheet 4 heat-welded to the plastic film 3). That is, the end part does not exist on the inner surface of the envelope. Conventionally, the joint boundary of the cushioning sheet has been a cause of catching when an object is inserted (because even that portion slightly forms a stepped portion), therefore, as in the present invention, the joint boundary of the cushioning sheet is an envelope. If it does not exist on the inner surface, the object is not caught at the time of insertion of the object, and as a result, the situation in which the cushioning sheet 4 is peeled off can be surely prevented.

Further, even if the inserted object is a rigid object such as metal, the sealing sheet 18 is not damaged by the cushioning sheet projecting portion 14 existing at the edge of the envelope opening. That is, when the rigid envelope content 19 is located near the upper end of the opening 12, the sealing portion 18 is pressed against the upper end of the rigid content 19 and may be scratched or torn. Yes, and even if the rigid contents are not located near the above-mentioned upper end, the contents may move in the envelope due to vibration during handling, and the sealing portion 18 may be damaged or damaged in the same manner. is there.

In the envelope of the present invention, since the cushioning sheet protrusion 14 covers and protects the inner surface of the sealing portion 18 in such a case, it is possible to prevent the rigid content 19 from damaging the sealing portion 18. (In FIG. 2, the state in which the lid portion 15 is closed and sealed is drawn by a chain double-dashed line. However, in reality, the lid portion 15 is not folded and sealed in two steps like this, and a cushioning sheet is used. (The lid 15 is bent and sealed as it is only near the upper end position of the protruding portion 14. The figure in the sealed state shown in the figure is merely a schematic diagram.)

[0018]

[Effect of the device]

 Since the envelope of the present invention has a structure in which the air-filled cushioning sheet is heat-welded to the plastic film surface in a state of slightly protruding from the edge of the envelope opening, the cushioning sheet is inserted at the time of insertion of an object. The object can be smoothly inserted without being caught between the plastic film surface and the surface. In addition, the above-mentioned protruding portion of the buffer sheet covers the inner surface of the sealed portion after the envelope is sealed to perform a protective function, damage to the sealed portion can be prevented, and the strength of the sealed portion can be improved.

Further, by providing the cushioning sheet protrusion, even if the envelope opening is sharp, it is not necessary to touch the hand and cut the hand, and at the time of sealing, the protrusion is a kind of The packing function can be exerted to make the inside of the envelope airtight. In the present invention, when the colors of the paper-based substrate sheet and the cushioning sheet are made different, the external appearance of the cushioning-sheet protruding portion is grasped as a color different from that of the paper-based substrate sheet, and that portion is conspicuous. The design effect is exhibited. As a result, the envelope opening, which is generally inconspicuous, can be seen at a glance and the usability can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of an envelope of the present invention.

FIG. 2 is a vertical sectional view taken along the line II-II of FIG.

[Explanation of symbols]

 1 Envelope Forming Sheet 2 Paper Base Sheet 3 Plastic Film 4 Air-filled Buffer Sheet 10 Edge of Opening 12 Opening of Envelope

Claims (1)

[Scope of utility model registration request] 1. An envelope-forming sheet obtained by laminating and integrating a plastic film on a paper base material sheet and superposing an air-filled buffer sheet on the plastic film side, wherein one side is continuous or discontinuous with each other. They are stacked so as to face each other, and peripheral open edges other than the edge that becomes the opening of the envelope are joined and integrated by heat welding, and at the edge of the envelope opening, the air-filled buffer sheet is more An envelope having a cushioning property, which is heat-welded to a plastic film surface in a slightly protruding state.