JPH08164944A - Packaging paper case - Google Patents

Abstract

PURPOSE: To obtain a packaging paper case which can be smoothly opened after unpacking and rationally produced. CONSTITUTION: A sealing part 5 is extended from a lid flap 4 of an envelope- like paper case main body 1 and has protruding opening tabs 7 on both sides and unsealing guide perforations 8 are provided at positions close to the tabs 7. A reinforcing tape 10 that is made of biaxially oriented synthetic resin film and provided with adhesive layers on both sides is bonded on the back of the sealing part 5. The adhesive layer on the surface of the reinforcing tape 10 is covered with a peelable releasing tape 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper case used for packing books, magazines, etc. for delivery to the home.

[0002]

2. Description of the Related Art Conventionally, as a packaging paper case of this type, an envelope-like case is formed by using a so-called double-sided tape (56) attached to the back surface of the tip sealing portion (55) of the lid piece (54). A case made of packing paper, which is designed to seal the opening of the main body (51), is generally used. In such a case made of packing paper, the grip portion (57) provided at the end of the lid piece (54) in the widthwise middle portion is pinched, and the middle portion of the lid piece (54) is torn to release the detached portion (58). As a result, in most cases, a so-called zipper part is initially provided along the length direction at the intermediate portion so that the band can be opened in a longitudinal direction without using scissors or a cutter. It was
However, if such a zipper part is too densely perforated to make it easy to open, or if the width is too wide, the breaking connection part between the perforations is likely to break, and it is inadvertently in transit. It may be opened. On the contrary, if the perforation is made too rough in order to prevent such unintended breakage of the breaking connection part, the tear free part (58) cannot be torn at once in a desired strip shape, or Alternatively, there has been a problem that the tearing direction is toward the width direction of the lid piece, which makes it difficult to open the lid.

Therefore, as shown in FIG. 5, a reinforcing thread (60) having a higher tensile strength than the paper constituting the paper case body is provided on the back surface of the tear loose portion (58).
A case made of packaging paper, which is attached along the length direction, has come to be used. In such a case made of packing paper, when tearing starts from one end of the tear loose portion (58), the tear loose portion (58) is securely torn to the other end along the reinforcing thread (60) without breaking. In addition to having the advantage that tearing perforations are not necessary and unintentional opening can be prevented, in manufacturing, there is a problem that the cost is increased by the amount of the reinforcing thread (60) attached. Have Also, a device in which a reinforcing tape is attached instead of the reinforcing yarn (60) has been proposed, but it has the same drawbacks.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a packaging paper case which can be smoothly opened after packaging and can be reasonably manufactured.

[0005]

According to the present invention, for the above-mentioned purpose, a reinforcing tape is attached so that the portion to be torn at the time of opening can be torn without interruption in the middle, and the reinforcing tape corresponds to the case body. It has an adhesive layer and has a sealing function.

That is, the present invention is provided with a lid piece for closing the opening of the case body of the packaging paper in the form of an envelope or a box, and a sealing portion extending at the tip of the lid piece. In a case of a packing paper, the opening of which is sealed by adhering to the one wall surface of the paper case body, an opening knob is provided at an end of the sealing part, and the sealing part is provided. On the back surface of, the reinforcing tape having a pressure-sensitive adhesive layer on both front and back surfaces that is prevented from tearing in the width direction of the sealing portion along the length direction of the sealing portion is attached, and the pressure-sensitive adhesive layer on the front surface side is Adopted a structure covered with a release tape that can be peeled off.

The reinforcing tape is preferably made of a synthetic resin film such as polypropylene having a tensile strength higher than that of the paper constituting the case body, particularly a uniaxially stretched or biaxially stretched synthetic resin film.

[0008]

When the opening end is picked up and the sealing part is pulled up in the lengthwise direction, the sticking between the sealing part and the case body is dissociated, and the lid near the sticking position of the reinforcing tape. The piece and the sealing portion are torn and separated.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to illustrated embodiments.

The case (C) made of packing paper according to the embodiment shown in FIGS. 1 to 3 has a case body (1) made of thick paper formed in an envelope shape, and a front wall (2) of the case body (1). )
A trapezoidal lid piece (4) is continuously provided from the upper end of the lid, and a sealing portion (5) to be attached to the rear wall (3) of the case body (1) is provided at the tip of the lid piece (4). Has been done. Reference numeral (6) is a glue margin piece continuously provided from the left and right side edges of the front wall (2).

The sealing portion (5) has opening knobs (7) extending from both ends, and is located close to the opening knobs (7) and at the boundary with the lid piece (4). The opening guide perforations (8) (8) are provided in the portion. A reinforcing tape (10) is attached to the back surface of the sealing portion (5) along the length direction of the sealing portion (5).

The reinforcing tape (10) is a synthetic resin film such as polypropylene having a tensile strength greater than that of the paper constituting the case body (1) and is a uniaxially or biaxially stretched film, It serves as a base material of a so-called double-sided tape having adhesive layers (11) and (12) on both sides. The pressure-sensitive adhesive layer (12) on the front surface side of the pressure-sensitive adhesive layer is covered with a release tape (13), and the user peels off the release tape (13) to arbitrarily change the pressure-sensitive adhesive layer (12).
It is supposed to expose.

Thus, the packaging paper case (C) having the above-mentioned configuration is in the unfolded state in which the paper case body (1), the lid piece (4) and the sealing portion (5) are in one plane. The reinforcing tape (10) is adhered to a predetermined position on the back surface of the sealing portion, and then the adhesive margin piece (6) is applied as in the case of the conventional envelope-shaped paper case.
(6) is attached to the outer surface of the rear wall (3) to form the case body (1) in an envelope shape. It is transported and stored in this state until it is used.

In use, after the object (B) is stored in the paper case body (1), the release tape (13) is peeled off from the reinforcing tape (10) as shown by the chain line in FIG. When the agent layer (12) is exposed, the lid piece (4) is folded back in the direction of the arrow, and the sealing portion (5) is pressed against the rear wall (3) of the case body and the adhesive margin pieces (6) and (6), it becomes adhesive. The sealing portion (5) is provided with the agent layer (12), and the rear wall (3) of the case body and the adhesive margin piece (6).
It is adhered to (6) and the opening of the paper case is sealed.

In order to unseal from the closed state, first, as shown in FIG. 2, the opening knob (7) at one end of the sealing part is picked up and the sealing part (5) is pulled up in the lengthwise direction. While the adhesion between the sealing portion (5) and the rear wall (3) begins to be released, the perforation (8) is broken. When the sealing portion (5) is pulled up as it is, the both start to separate from the perforation (8) continuously at the boundary between the lid piece (4) and the sealing portion (5). Further, when the sealing portion (5) is continuously pulled up in the length direction, the lid piece (4) and the sealing portion (5) are arranged along the reinforcing tape (10) on the back surface of the sealing portion (5).
Are separated from each other, the perforation (8) at the other end can be further broken to cut off the sealing portion (5), and the opening is performed.

FIG. 4 shows another embodiment of the present invention, in which the case body (21) is formed in a box shape, and the case body (21) is continuously connected from the rear wall in the same manner as in the previous embodiment. A sealing portion (5) is further extended at the tip of the covered lid piece (4), and the back surface of the sealing portion (5) extends in the width direction of the sealing portion along the length direction of the sealing portion. A reinforcing tape (10) having a pressure-sensitive adhesive layer on both front and back surfaces is attached to prevent tearing. Since the method of use is the same as that of the previous embodiment, detailed description is omitted.

[0017]

As described above, according to the present invention, the opening knobs (8) and (8) are provided at the end of the sealing portion (5), and the lengthwise direction of the sealing portion (5) is increased. Along the sealing part (5)
Reinforcement tape (10) having pressure-sensitive adhesive layers (11) (12) on both front and back sides is adhered to prevent tearing in the width direction of Tape (1
Since it is covered with 3), not only can sealing be performed easily, but when opening the sealing part (5), pulling the sealing part (5) in the length direction of the sealing part (5) The lid piece (4) and the sealing portion (5) can be reliably separated in the vicinity of the reinforcing tape (10) without being divided, and an extremely smooth opening is possible. Further, since there is no need for perforations for opening between the lid piece (4) and the sealing portion (5), there is no fear of unintentional opening during transportation or transportation after packaging.

In addition, the step of providing the pressure-sensitive adhesive layer in the conventional case made of packing paper is performed by only one step of attaching the reinforcing tape (10) having the pressure-sensitive adhesive layers (11) and (12) on both front and back surfaces,
It is possible to impart the function imparted by two steps including the step of providing the unsealing reinforcing thread, and it is possible to rationalize the production and eventually reduce the production cost.

According to the second aspect of the present invention, since the reinforcing tape (10) is made of a synthetic resin film such as polypropylene having a higher tensile strength than the paper constituting the case body, sealing at the time of opening Further secure the prevention of division of the portion (5).

According to the third aspect of the present invention, since the reinforcing tape (10) is made of a uniaxially stretched or biaxially stretched synthetic resin film, it is possible to further prevent the sealing portion (5) from being divided during opening. I am more certain.

[Brief description of drawings]

FIG. 1 is a perspective view of a packaging paper case according to the present invention.

FIG. 2 is a perspective view at the start of opening the same.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a perspective view of another embodiment of the packaging paper case according to the present invention.

FIG. 5 is a perspective view of a conventional packing paper case.

[Explanation of symbols]

 1 ... Paper case body 4 ... Lid piece 5 ... Sealing part 7 ... Opening tab 10 ... Reinforcing tape 11, 12 ... Adhesive layer 13 ... Release tape

Claims (3)

[Claims] 1. A cover case for closing an opening of an envelope-shaped or box-shaped case body made of packing paper, and a sealing portion extending to a tip of the lid piece, the sealing portion being a paper case body. By sticking to one wall surface of the packaging paper case, the opening of which is to be sealed, with an opening knob at the end of the sealing portion,
A reinforcing tape that prevents tearing of the sealing portion in the width direction along the length direction of the sealing portion and has adhesive layers on both front and back surfaces is attached, and the adhesive layer on the front surface side can be peeled off easily. A case made of packing paper, which is covered with a mold tape. 2. The packaging paper case according to claim 1, wherein the reinforcing tape is made of a synthetic resin film such as polypropylene having a tensile strength higher than that of the paper constituting the case body. 3. The packaging paper case according to claim 2, wherein the reinforcing tape is made of a stretched film.