JPH1044690A - Envelope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an envelope wherein opening and closing of a flap are easy and contents can be prevented from getting out. SOLUTION: In an envelope wherein a first and a second sheets 12, 14 which are both rectangular and of the same size are superimposed on each other, both sheets are bonded to each other on three sides thereof, and both sheets 12, 14 are not bonded on the other one side to make an opening part, a flap 24 is extended from a side edge of the first sheet 12 over a length of at most one half of its total length. The flap 24 is made bendable on the second sheet 14 side via a hinge part 32 extending parallel to the side edge at its base part, and an adhesive is arranged on a surface to the second sheet side in the flap 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an envelope, and more particularly to an improvement in an envelope flap.

[0002]

2. Description of the Related Art An envelope shown in FIG. 7 is conventionally known. This envelope 1 has a rectangular first sheet 2 and a second sheet 3 of the same size, which are made of a flexible plastic film.
The two sheets 2, 3 are connected at 5, 6,
On the other side, the two sheets are not connected and are configured as an opening of an envelope. In this envelope, on the other side, that is, the opening 7,
A flap 8 having a length slightly longer than the side edge of the first sheet 2 extends over the entire length on one side. An adhesive layer 9 is formed on the surface of the flap in an appropriate manner. Since the flap 8 is formed of a flexible material, a linear portion extending along the side edge of the flap 8 is used as a hinge portion, and the flap 8 is folded on the second sheet 3 via the hinge portion. By stacking and pressing the flap 8 onto the second sheet 3, the flap 8
Is fixed with respect to the second sheet 3 via the adhesive layer 9. In this way, the envelope closes. When opening and taking out the contents, place the flap 8 over its entire length.
The sheet is pulled away from the surface of the second sheet 3 against the adhesive force of the adhesive, and the flap 8 is brought into a developed state as shown in the figure.

In such a conventional envelope, it is necessary to adhere the flap to the entire length of the side edge of the envelope or to peel it off from the adhered state every time the contents are put in or taken out. It is difficult to insert and remove.

[0004]

In order to solve the above-mentioned problems, in the present invention, first and second sheets, both of which are rectangular and of the same size, are overlapped with each other, and the two sheets are joined together. Side, and the other side of the envelope is opened without connecting the two sheets, and on the other side, one half of the entire length
A flap is extended from a side edge of the first sheet over the following length, and the flap can be bent toward a side of the second sheet via a hinge portion extending parallel to the side edge at a base thereof. In addition, an envelope is provided in which an adhesive is disposed on the surface of the flap on the side of the second sheet.

In the envelope of the present invention, the flap is
One half of the total length of the side edge of the envelope provided with this flap
It is provided in the following lengths. Therefore, there is no need to bond the flap over the entire length of the side edge of the envelope or to peel off the flap from the bonded state, so that the opening and closing of the flap is extremely easy, and the contents can be smoothly inserted and taken out. Moreover, escape of the contents can be effectively prevented.

[0006]

1 to 5 show an embodiment of the present invention.

Reference numeral 10 denotes a rectangular envelope. The envelope 10 is entirely formed of a flexible plastic film. The envelope 10 has a rectangular first sheet (back side in the figure) 12 and a second sheet (front side in the figure) 12 of the same size, and the sheets 12 and 14 are placed on the upper side 16 and the left side. 18 and the lower side 20 are connected on three sides. On the other side 22, both sheets 12,
14 is not connected, and an opening is formed at this location.

The front and back sheets 12, 14 may be glued or welded to each other on the three sides 16, 18, 20 of rectangular sheet pieces separated from each other. Further, a material formed in a tube shape extending in the lateral direction in FIG. 1 may be used. In this case, the upper part 16 and the lower part 20 are obtained as continuous parts at the time of tube molding. And
1 is obtained by cutting the tube elongated in the horizontal direction in the vertical direction in FIG. 1 at the left 18 and right 22 locations, and then bonding the left 18 to the bag material. Alternatively, heat welding may be performed. In addition, a flat sheet extending in a laterally long shape in FIG. 1 is folded at, for example, a portion corresponding to the upper side 16 to form two sheets of front and back surfaces. After cutting at the point, 18
May be formed by heat welding. In short, any method for producing the envelope may be used as long as the envelope has the basic form described in the claims.

On the other side 22 of the bag 10, a flap 24 having a length of about one third of the one side 22 extends from a side edge 26 of the first sheet 12. It is preferable that the upper and lower side edges 28 and 30 of the flap 24 be cut obliquely as shown to form a trapezoidal shape.

Since the flap 24 is also formed of a flexible plastic sheet material, the side edge 2 is formed at the base (left end in FIG. 3) of the flap 24.
The flap 24 is folded so as to rise from the state shown in FIG. 3 to the front of the drawing sheet at the hinge portion, and this is placed on the surface of the second sheet 14. Fold it. At this time, since an adhesive is interposed between the flap 24 and the second sheet 14 as described later, the flap 24 is
4 and held in a folded state.

The hinge may have a groove shape such as a V-shape as shown by 32a in FIG.

The flap 24 is provided with a plurality of small rectangular windows 34 arranged in series at appropriate intervals.
A single-sided adhesive tape 38 is provided on the outer surface 36 (the front surface side in FIG. 1) of the flap 24. Single-sided adhesive tape 38
Consists of a base material 40 and an adhesive layer 42 provided thereon. The single-sided adhesive tape 38 is adhered to the outer surface 36 of the flap 24 via an adhesive layer 42. At this time, a part of the adhesive layer 42 is desired to be outward from the small window 34 (on the front side in FIG. 3). Therefore, in the state of FIG. 1, the adhesive layer 42 faces the front side of the second sheet 14 constituting the envelope 10, and the adhesive layer 42 is
1 is pressed from above in FIG. 1 to bond the adhesive layer 42 to the surface of the second sheet 14. The flap 24 is adhered to the second sheet 14 via such an adhesive layer 42.

Thus, since the adhesive layer 42 is desired to be outward from the small window 34 (shown briefly in FIG. 4),
The surface of the adhesive layer 42 is recessed inward from the inner surface (upper surface in FIG. 4) 37 of the flap 24 by the thickness of the flap 24. In this way, the adhesive strength of the adhesive layer 42 is slightly controlled. That is, the flap 2 in FIG.
Even if another object comes into contact with the upper surface of the adhesive layer 4, it does not come into strong contact with the adhesive layer 42. In this manner, as described later, the contents are not adhered to the adhesive layer, and the smooth insertion and withdrawal of the contents is not hindered. However, the surface of the adhesive layer 42 has a very small distance by the thickness of the flap 24,
4 is drawn inward from the surface of FIG. 4 (FIG. 4 emphasizes the thickness of each sheet for convenience of explanation), so that the upper surface of the flap 24 constitutes the envelope 10 in the state of FIG. By pressing strongly against the second sheet 14, the surface of the adhesive layer 42 comes into contact with the second sheet 14 to be bonded.

As shown in FIG. 5, when the contents A are inserted into the envelope 10, the flap 24 is folded down to the right and deployed. In this state, the contents A are inserted into the envelope 10 from the opening 22. After the content A is inserted to the far end of the envelope 10, that is, the left end portion 18, the flap 24 is folded back to the near side of the paper surface, and the flap 24 is further formed into the second envelope 10 as shown in FIG. Folded on the upper surface of the sheet 14 and pressed. Thereby, the flap 24 is closed via the adhesive layer 42.

Although not shown, when the envelope 10 is transported or stored, a long release paper is disposed on the inner surface 37 side of the flap 24 in FIG. May be attached to the flap 24.

Although the single-sided adhesive tape 38 is used in the above-described embodiment, a double-sided adhesive tape may be attached to the inner surface 37 of the flap 24, that is, the upper surface in FIG. Further, the adhesive may be directly applied to the inner surface 37 of the flap 24.

In the above embodiment, one long side 22 of the envelope 10 is formed as an opening, and a flap 24 is provided at this position. Alternatively, as shown in FIG. 6, the side 22 which is the short side of the rectangular envelope 10 may be an opening, and the flap 24 may be provided at this position.

In each of the above embodiments, the flap 24 is provided at one end in the longitudinal direction of the side edge with the opening 22 (the lower side 20 in FIG. 1).
Alternatively, the flap 24 may be provided slightly closer to the center than in FIG. 1 or completely at the center.

The length of the flap 24 must be less than half the length of the side 22 of the envelope 10 in which the flap 24 is provided. Exceeding this, it is difficult to smoothly open and close the flap 24 and eventually insert and remove the contents. When the flap 24 is too short, it is difficult to completely prevent the small contents from coming out of the envelope. It is most preferable that the flap 24 be about one third of the total length of the side edge 22 of the envelope provided with the flap 24, from the viewpoint of opening and closing convenience and from the viewpoint of preventing the contents from escaping.

[0020]

In the envelope of the present invention, the flap is provided partially with respect to the entire length of the side edge of the envelope on which the flap is provided, particularly, at a length of not more than half of the entire length. Since there is an adhesive layer on the inner surface of the flap, it is easy to adhere the flap to the envelope main body and to peel off the flap from the envelope main body, so that the contents can be easily inserted and withdrawn. Moreover, escape of the contents can be effectively prevented.

[Brief description of the drawings]

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

FIG. 2 is an enlarged view of a main part of the previous figure.

FIG. 3 is an enlarged view showing a state in which a flap is expanded in the previous figure.

FIG. 4 is a sectional view taken along the line IV-IV of the preceding figure.

FIG. 5 is a perspective view showing a state where contents are inserted into the envelope.

FIG. 6 is a perspective view showing another embodiment.

FIG. 7 is a perspective view showing an example of a conventional envelope.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Envelope 12 1st sheet 14 2nd sheet 16, 18, 20 Three sides 22 The other side 24 Flap 32 Hinge part 42 Adhesive layer

Claims (1)

[Claims] 1. A first and a second sheet which are both rectangular and of the same size are superimposed on each other, and the two sheets are connected on three sides thereof, and the other sheets are not connected on the other side. In the envelope formed as an opening, on the other side, over a length equal to or less than half of the entire length,
A flap is extended from a side edge of the first sheet, and the flap can be bent toward a side of the second sheet at a base portion thereof via a hinge portion extending parallel to the side edge. An envelope in which an adhesive is disposed on the surface on the side of the second sheet.