JP5223139B1 - Easy-open envelope - Google Patents

Abstract

An easily openable envelope is provided which includes an easily openable means by perforations, a sealing means by a peelable adhesive having no re-adhesiveness, and a means for preventing movement of documents in the envelope.
The easy-opening means in an easy-opening envelope crosses the top part, the side part, and the lower part of the glue in a straight line with a certain distance in the opening-side flap direction from the sealing side bottom end folding line of the envelope. In addition to providing perforations, opening opening holes are provided at the positions where the perforations and perforations at the boundary between the top and the side and the boundary between the top and the bottom of the glue and the perforation intersect. The prevention means comprises a peelable adhesive application region that linearly crosses the top and bottom portions, the side portions, and the adhesive lower portion with a blank region having a constant width in the opening side flap direction from the position where the perforation is provided, The opening of the envelope is made easy by breaking the perforation, and the peelable adhesive application area is provided to ensure the sealing of the area in which the document in the envelope is stored, and the sewing machine for the document in the envelope Take the means for limiting the movement to the side.
[Selection] Figure 1

Description

  The present invention relates to an envelope provided with easy-opening means using perforations, sealing means using a peelable adhesive having no re-adhesion, and means for preventing movement of documents in the envelope.

  Conventionally, as a method of opening a received envelope, a method of opening using a tool such as scissors or a paper knife, and a method of cutting the end of the envelope with a finger are generally used.

  The method of opening with the above tools is troublesome because tools such as scissors and paper knives must be prepared each time the envelope is opened. On the other hand, the method of opening with a finger is to open the envelope opening. Can not be opened with cleanly arranged, and the document enclosed in the envelope moves in the direction of the opening and cuts or tears the edge of the document at the time of opening There was a problem.

  Conventionally, proposals have been made to solve the above problems. For example, a “envelope provided with a perforation” (Patent Document 1) is proposed in which a perforation is provided in an opening on the sealing side of the envelope to facilitate opening.

  However, the proposal of the above-mentioned “envelope provided with a perforation” is that a notch-like continuous hole that forms the perforation is formed by providing a perforation in the opening on the sealing side of the envelope. As the perforation is opened in the envelope, there is a problem that the enclosed document gets wet due to rain or water droplets, and the enclosed document is on the perforation side in the envelope. Because it moves, there is a problem that the edge of the document is damaged when opening the perforation, and the sealing means by the peelable adhesive that does not have re-adhesion and the movement prevention means of the document in the envelope It was not an envelope with.

  Conventionally, an “envelope” (Patent Document 2) in which a cutting thread for opening is provided along the folding line of the opening side flap of the envelope has been proposed.

  However, the proposal of the “envelope” described above requires an opening cutting thread to be provided in the folded portion on the opening side of the envelope, leading to an increase in the manufacturing cost of the envelope and a complicated manufacturing process. There is also a problem that the end of the cutting thread protrudes outside the envelope, which is entangled with an automatic sorting device that sorts mail items, causing a failure of the device and also damaging the envelope itself. As described above, the envelope was not provided with a sealing means using a peelable adhesive having no re-adhesiveness and means for preventing movement of documents in the envelope.

  In addition, a “simple opening envelope” (Patent Document 3) that provides a saw blade-like cardboard along the perforation to facilitate the opening action has also been proposed.

  However, the above-mentioned proposal of “easy opening envelope” is one in which a cardboard is provided at the opening of the envelope in order to facilitate the perforation of the perforation. There is a problem that leads to an increase in the shipping cost and a problem that leads to an increase in the cost of manufacturing the envelope. There wasn't.

  Further, conventionally, an “envelope” (Patent Document 4) has been proposed in which a stopper, an adhesive portion is provided on the envelope lid, a perforation, a perforation, the back of the lid, or the envelope body.

  However, the above-mentioned “envelope” proposal is a structure in which the knob is perforated and is cut off by pulling upward with a finger, and the center knob is opened with a finger. It is mechanically difficult to cut the bellows-like perforated perforation while expanding it into a V shape by pulling upwards in the gripped state (it is possible to cut it in the direction of narrowing in a reverse V shape). The bellows-shaped cut-out perforation is difficult and difficult to open unless it is cut one side at a time while inserting a finger into the perforated perforation. There is a problem that the document enclosed by the perforated perforated hole gets wet with rain or water droplets, and it is easy to open and peelable without re-adhesion It was not envelope comprises movement prevention means of the document sealing means and the envelope by.

  Conventionally, there has been proposed a “cut-perforated envelope” (Patent Document 5) in which a bellows-shaped cut perforation is provided at the folded-back portion on the opening side of the envelope to facilitate the opening of the envelope.

  However, the proposal of the above-mentioned “cut-off perforated envelope” is that the end face of the bellows-like cut perforation to be cut is not attached to the back surface of the envelope, so that the end face of the perforation sorts mail items The envelope itself may be damaged by being entangled with it, and at the time of opening, the bellows-like cut perforation may be cut off in the middle to make the opening operation more troublesome. In addition, regarding the sealing performance inside the envelope, the envelope-side flap is simply folded in two, so the enclosed document is not completely sealed with glue or the like, and gets wet with rain or water drops. The problem is that the crease part cut off by the perforation remains slightly, so when taking out the document from the envelope, the crease part of the crease part must be opened with a fingertip and opened, As described above, it was not an envelope provided with a means for sealing with a peelable adhesive having no easy-opening means and re-adhesiveness, and means for preventing movement of documents in the envelope.

  Further, conventionally, an “envelope” (Patent Document 6) has been proposed in which a bellows-shaped cut perforation is provided on the back side of an envelope, and an outer tongue piece for sealing is covered from above to improve the appearance.

  However, the above-mentioned proposal of “envelope” is merely a proposal for improving the appearance of the appearance by simply covering the outer tongue piece for sealing against the bellows-shaped cut perforation. As shown in FIG. 1 of Patent Document 6, there is a problem that sealability cannot be ensured because a part of the bellows-shaped cut perforation protrudes from both ends of the outer tongue piece. As shown in FIG. 2, in order for the outer tongue piece and the bellows-shaped cut perforation to be unsealed, the unsealed state shown in the drawing is not obtained unless the outer perforation line has a perforation line. Further, when taking out the document enclosed in the envelope in the state of FIG. 3 of Patent Document 6, there is a problem that the corner face of the document is caught on both left corners on the opening side of the envelope and is difficult to take out. I, the same was not the envelope comprises movement prevention means of the document in the sealing means and the envelope by peelable means and re-adhesion can not peelable adhesive.

  Furthermore, an “envelope” (Patent Document 7) in which a releasable adhesive means is provided on the overlapping surface of a sealing piece of an envelope and a corresponding portion facing the sealing piece at the time of sealing has also been proposed.

  However, the above-mentioned “envelope” proposal is merely a proposal using a peelable adhesive that does not have re-adhesiveness on the envelope sealing piece, and is open to one side against unauthorized opening by others. Since a special sealing device is required to make a mold, it is difficult to use in a general household, and the peelability of the peelable adhesive that sticks the envelope finds intentional tampering It is impossible to say that it is an absolutely reliable proposal that can be performed without tampering, but as above, a means for sealing with a peelable adhesive that does not have easy-opening means and re-adhesiveness, and It was not an envelope provided with means for preventing movement of documents in the envelope.

  The applicant of the present invention pays attention to the problems of the sealing properties that are contrary to the easy opening by the perforation applied to the envelope as described above, and the problems of the mobility in the envelope of the document. Under the idea of whether it can not be solved by an easy means, by providing an easy-opening means by perforations, a sealing means by a peelable adhesive that does not have re-adhesion, and a means for preventing movement of documents in the envelope, Developed an easy-open envelope that solves the problems of easy-opening due to the perforation and the problem of mobility in the envelope of documents, and proposes the "easy-opening envelope" in the present invention. It leads to.

Utility Model Registration No. 3030310 JP 2009-29488 A Japanese Patent No. 3902693 Japanese Patent Laid-Open No. 2002-19787 Utility Model Registration No. 3089439 Japanese Patent No. 3917886 JP 2001-233346 A

  In view of the above problems, the present invention provides an easy-open envelope provided with an easy-opening means by perforations, a sealing means by a peelable adhesive having no re-adhesiveness, and a means for preventing movement of documents in the envelope. Is an issue.

  The easy-open envelope of the present invention is an easy-open envelope provided with easy-open means by perforation, sealing means by a peelable adhesive having no re-adhesiveness, and means for preventing movement of documents in the envelope. The easy-opening means is provided with a perforation that linearly crosses the top portion, the side portion, and the adhesive bottom portion with a certain interval in the opening side flap direction from the sealing side bottom end folding line of the envelope, An opening start hole is provided at a position where the perforation and the folding line provided on the boundary between the top and bottom portions and the boundary between the top and bottom portions and the lower part of the glue, and the sealing means and the movement preventing means are provided. A peelable adhesive application region that linearly crosses the top portion, the side portion, and the adhesive lower portion with a blank region having a constant width in the opening-side flap direction from the position where the perforation is provided, To break the eyes The opening of the envelope is made easy, and the peelable adhesive application area is provided to ensure the sealing of the area in which the document in the envelope is stored, and to the perforation side of the document in the envelope Take measures to limit movement of

  The easy-open envelope of the present invention employs means in which binding holes are arranged along the perforation in the blank area of the envelope.

  The easy-open envelope of the present invention is provided with a strong adhesive paste layer covered with release paper on the inside of the opening side flap of the envelope, and a strong adhesive paste layer on the inside of the sealing side bottom of the envelope. By providing it, we will adopt the means that can be attached.

  According to the easy-open envelope of the present invention, a perforation that linearly crosses the top portion, the side portion, and the adhesive bottom portion is formed at a certain interval in the opening side flap direction from the sealing side bottom end folding line of the envelope. This makes it possible to tear the perforation easily with both hands, and since the envelope cannot be opened without performing the act of tearing the perforation, it has absolute reliability that prevents unauthorized opening. It has a sealing property and has an excellent effect that it can be used for highly confidential documents, important documents, registered mail, registered mail.

  Further, according to the easy-open envelope of the present invention, the peelable adhesive that linearly crosses the top, side, and lower part of the glue, leaving a blank area of a certain width in the opening side flap direction from the position where the perforation is provided. By providing the agent application area, the area in which the documents in the envelope formed by the adhesion area of the opening side flap and the adhesion area of the peelable adhesive application area are completely isolated is secured to ensure sealing performance. In addition, since the peelable adhesive application region is provided in the envelope, there is an excellent effect that the movement of the document in the envelope toward the perforation can be restricted.

  Further, according to the easily openable envelope of the present invention, by opening a blank area having a certain width in the opening side flap direction from the position where the perforation is provided, the opening opening opened by the perforation is used for both hands using the blank area. It is possible to easily spread and peel off the peelable adhesive application region, and it is possible to easily take out the document in the envelope.

  Further, according to the easy-open envelope of the present invention, the easy-opening means by perforation, the sealing means by the peelable adhesive having no re-adhesion, and the means for preventing the movement of the document in the envelope are greatly improved in the manufacturing process. It is possible to provide not only the center-bonded envelope but also the inner-barrel-bonded envelope, the outer-barrel-bonded envelope, the diamond-bonded envelope and the like with the excellent effect that it can be provided without increasing the cost.

  Further, according to the easy-open envelope of the present invention, by adopting a mode in which binding holes are arranged along the perforation in the blank area of the envelope, the easy-open envelope that has been used or the easy-open for storage is used. This has an excellent effect that the adhesive envelope can be stored in a ring-type binding binder.

It is explanatory drawing which shows embodiment of the easily openable envelope of Claim 1 in this invention. Example 1 It is explanatory drawing which shows embodiment of the easily openable envelope of Claim 2 in this invention. (Example 2) It is explanatory drawing which shows embodiment of the easily openable envelope of Claim 3 in this invention. (Example 3)

  The easy-open envelope of the present invention is an easy-open envelope provided with easy-open means by perforation, sealing means by a peelable adhesive having no re-adhesiveness, and means for preventing movement of documents in the envelope. The easy-opening means is provided with a perforation that linearly crosses the top portion, the side portion, and the adhesive bottom portion with a certain interval in the opening side flap direction from the sealing side bottom end folding line of the envelope, An opening start hole is provided at a position where the perforation and the folding line provided on the boundary between the top and bottom portions and the boundary between the top and bottom portions and the lower part of the glue, and the sealing means and the movement preventing means are provided. A peelable adhesive application region that linearly crosses the top portion, the side portion, and the adhesive lower portion with a blank region having a constant width in the opening-side flap direction from the position where the perforation is provided, To break the eyes The opening of the envelope is made easy, and the peelable adhesive application area is provided to ensure the sealing of the area in which the document in the envelope is stored, and to the perforation side of the document in the envelope The greatest feature is that a means for restricting movement is taken. Hereinafter, an embodiment of an easy-open envelope according to the present invention will be described based on the drawings.

  In addition, the easy-open envelope in the present invention is not particularly limited to the configuration of the embodiment described below, and can be arbitrarily changed without departing from the gist of the present invention.

FIG. 1 is an explanatory view showing an embodiment of an easily openable envelope 10 according to claim 1 of the present invention.
The easy-open envelope 10 in this embodiment includes an easy-open means by the perforation 20, a sealing means by the peelable adhesive application region 31, and a means for preventing the document S from moving in the envelope 11.

  The envelope 11 is a long envelope that is attached to the center. The envelope 11 has a side portion 13 and a lower glue portion 14 on both sides of the top and bottom portion 12, an opening side flap 15 is arranged on the upper side, and a sealing side is provided on the lower side. The bottom 16 is arranged and connected to each other, and the side portion 13 and the lower glue portion 14 are folded inward with a streak 17 and the overlapped glue margin is pasted with glue. is there. For example, the long No. 3 envelope has a size of 120 mm wide × 235 mm long, and is used as a standard mail for documents S and DM by folding the A4 size into three long sides.

  The perforation 20 is formed by linearly crossing the top portion 12, the side portion 13, and the adhesive lower portion 14 from the sealing side bottom end folding line 18 of the envelope 11 in a direction toward the opening side flap 15. Is. The perforation 20 has a tooth length of 2 mm or less and a stop length of 1 mm or less, and is formed in a shape that does not have a step that stresses the perforation 20.

  By the way, with respect to the position of the perforation 20 from the sealing-side bottom end folding line 18, as shown in FIG. Since the stop portion of the perforation 20 must be torn, it is preferable to avoid the width of the sealing side bottom 16 as shown in FIGS. According to such an embodiment, the stop portion of the perforation 20 is only required for the thickness of the top portion 12 and the side portion 13 or the adhesive lower portion 14, so that the tearability is improved. However, if it is necessary to provide easy-opening means and sealing means and movement prevention means for the document S in the envelope 11 in a shape that can be accommodated in a standard mail, the perforation 20 as shown in FIG. It is also possible to have a mode in which the hose is provided on the sealing side bottom 16.

  Thus, according to the easy-open envelope 10 according to the present invention, the envelope 11 cannot be opened and the document S in the envelope 11 cannot be taken out unless the perforation 20 is torn. It has absolute reliability and sealability that is not tampered with, and can be used for highly confidential documents, important documents, registered mail, registered mail.

  The opening start hole 21 is provided at a position where the perforation 20 and the folding line 17 provided at the boundary between the top and bottom portions 12 and 13 and the boundary between the top and bottom portions 12 and the adhesive lower portion 14 intersect each other. . By providing a substantially rhombic opening opening opening hole, the tearability at the start of tearing of the perforation 20 is facilitated.

  The peelable adhesive application region 31 linearly crosses the top portion 12, the side portion 13, and the adhesive lower portion 14 with a blank region 30 having a certain width from the position where the perforation 20 is provided toward the opening side flap 15. It is provided as follows. As an adhesive applied to the peelable adhesive application region 31, for example, a peelable adhesive CFW-250 (trade name) having re-adhesiveness mainly composed of acrylic, silica, or the like can be considered.

By sticking the peelable adhesive application area 31 coated with the adhesive as described above, it is formed between the sticking area of the opening side flap 15 and the sticking area of the peelable adhesive application area 31. The region 32 in which the document S is stored in the envelope 11 is completely isolated to ensure sealing performance.
Further, by providing the peelable adhesive application region 31 at the above position, it becomes a movement preventing means for restricting the movement of the document S in the envelope 11 toward the perforation 20 side.

  The blank region 30 is provided with a certain width in the direction of the opening side flap 15 from the position where the perforation 20 is provided. By providing such a blank area 30, the opening 19 formed by the top part 12, the side part 13, and the lower glue part 14 can be easily pushed out with both hands, and is enclosed in the envelope 11. The document S can be easily taken out.

FIG. 1A is an explanatory view showing a developed state of the center-open easy-open envelope 10.
The easy-open envelope 10 has a side part 13 and a glue lower part 14 arranged on both sides of the top and bottom part 12, an opening side flap 15 arranged at the upper part, and a sealing side bottom 16 arranged at the lower part, respectively. Are connected to each other, and the side portion 13 and the adhesive lower portion 14 are folded at the inner side with a streak 17 to be formed into a center-attached long envelope 11 from the sealing side bottom end folding line 18 to the opening side flap. A perforation 20 is formed that crosses the top and bottom portions 12, 13, and the lower glue portion 14 in a straight line with a certain interval in 15 directions, and the boundary between the top and bottom portions 12 and the side portions 13 and the top and bottom portions 12 and glue. An opening start hole 21 is provided at a position where the folding line 17 provided at the boundary with the lower portion 14 and the perforation 20 intersect, and a blank area having a constant width from the position where the perforation 20 is provided toward the opening side flap 15. 30 Only to those that are stamped cut and fold provided peelable adhesive application area 31 across the top and bottom portions 12 and the side portion 13 and glue the lower 14 linearly.

FIG. 1B is an explanatory view showing a state where the center-open easy-open envelope 10 is stuck up.
The easy-open envelope 10 includes a side portion 13 and a paste lower portion 14 which are arranged on both sides of the top and bottom portion 12, folded inside with a streak 17, and pasted the glue margin portion overlapped with glue. The upper opening side flap 15 is opened by folding the sealing side bottom 16 provided on the inner side with the sealing side bottom end folding line 18 and sticking with the glue from above the side part 13 and the adhesive lower part 14. It is affixed to the envelope 11 in the state where it is in contact. In order to accurately overlap the tooth length and the stop length of the perforation 20, it is preferable that the perforation 20 is provided after the envelope 11 is attached, but in the present invention, the cost is considered. The method of processing in the first cutting / folding process is illustrated.

FIG. 1C is an explanatory view showing a state in which the document S is enclosed in the center-open easy-open envelope 10.
The document S is inserted into the envelope 11 with the opening side flap 15 opened, and the opening side flap 15 is closed and adhered with glue to form a sealed letter.

FIG. 1D is an explanatory view showing a state where the sealing side of the center-open easy-open envelope 10 is opened.
An envelope portion 11a in which a document S is stored, and a sealing side by tearing a perforation 20 provided at a predetermined interval from the sealing-side bottom end folding line 18 of the envelope 11 toward the opening-side flap 15 The bottom 16 is separated into the envelope portion 11b. When the perforation 20 is cut, an opening start hole 21 is formed at the opening start end of the perforation 20 where the fold lines 17 provided at the boundary between the top and bottom portions 12 and 13 and the boundary between the top and bottom portions 12 and 14 are intersected. Is provided, the perforation 20 can be easily cut from both directions.

FIG. 1E is an explanatory view showing a state where the document S is taken out by opening the sealing side of the center-open easy-open envelope 10.
By forming a blank area 30 having a certain width in the direction of the opening side flap 15 from the position where the perforation 20 is provided, the blank area 30 is spread with a finger so that the sticking state by the peelable adhesive application area 31 is achieved. The document S in the envelope 11 is taken out from the opening 19 opened by the perforation 20 after being released.

FIG. 1 (f) is an explanatory view showing a position where another perforation 20 of the center-sealed easy-open envelope 10 is provided.
When it is necessary to provide the easy-opening means and the sealing means in the present invention and the means for preventing the movement of the document in the envelope, the perforation by the perforation 20 may be sacrificed to some extent. 20 can also be provided so as to be hung on the sealing-side bottom 16.

  Note that the long (western or horizontal) envelope 11 to which the inner and outer paddings are attached is basically the same in structure as the center-attached envelope, and is used in a horizontally oriented state. . Therefore, the opening side flap 15 and the sealing side bottom 16 are arranged in the lateral direction, the height dimension of the side part 13 located at the upper part is shortened, and the height dimension of the adhesive lower part 14 located at the lower part is lengthened, In any one of the lateral directions, the easy-opening means according to the present invention, the sealing means, and the movement preventing means for the document in the envelope are provided and used.

  Moreover, about the sealing means of the easy-open envelope 10 in this invention, and the movement prevention means of the document S in the envelope 11, the means to stick with releasable adhesive CFW-250 (brand name) etc. without re-adhesiveness However, by finely adjusting the adhesive strength of the peelable adhesive at the manufacturing stage, it can be bound and stored as a storage envelope 11 after use.

FIG. 2 is an explanatory view showing an embodiment of the easy-open envelope 10 according to the second aspect of the present invention, and FIG. 2A is an explanatory view showing an embodiment in which a binding hole 33 is provided in the blank area 30 of the envelope 11. FIG.
In addition to the first embodiment described above, the easy-open envelope 10 of the present embodiment is formed by arranging the binding holes 33 in the blank area 30 of the envelope 11 along the perforation 20.

  The binding holes 33 are arranged along the perforations 20 in the blank area 30 of the envelope 11 in accordance with the ring pitch of the ring-type binding binder 34. The binding hole 33 is provided in the blank area 30 and is sealed with the peelable adhesive application area 31, whereby the area 32 where the document is stored is completely sealed to protect the document S enclosed in the envelope 11. Is.

FIG. 2B is an explanatory diagram showing a use state of the envelope 11 in which the binding hole 33 is provided in the blank area 30.
The easy-open envelope 10 that has been used and the easy-open envelope 10 for storage can be bound and stored in a ring-type binding binder 34.

FIG. 3 is an explanatory view showing an embodiment of the easy-open envelope 10 according to claim 3 of the present invention.
The easy-open envelope 10 of this embodiment is provided with a strong adhesive paste layer 35 covered with a release paper 36 inside the opening-side flap 15 of the envelope 11 in addition to the above-described embodiments, and sealing the envelope 11 By providing and sticking a strong adhesive paste layer 35 on the inner side of the side bottom 16, the sealing operation of the envelope 11 is simplified and the adhesiveness is further strengthened.

Thus, by using a strong adhesive glue layer 35 which is Kutsugaekomu with release paper 36 on the opening side flap 15 of the envelope 11, the opening-side flap 15 and the sealing side bottom 16 is strongly adhesive glue layer of the envelope 11 35 Therefore Since it is completely sealed from both sides, it can be used for sending highly secure documents as well as highly confidential documents and important documents, registered mail, registered mail.

  The easy-open envelope 10 according to the present invention is mainly used as a standard mail for sending documents and DMs. As other utilization methods, it is used as a paper pack for courier service or for office use. It can be used in various ways as a bag body, and it is understood that the industrial applicability of the “easy-open envelope” in the present invention is extremely large.

DESCRIPTION OF SYMBOLS 10 Easy-open envelope 11 Envelope 11a Envelope part 11b in which the document is stored Envelope part 12 in which the sealing side bottom is formed Top part 13 Side part 14 Adhesive lower part 15 Opening side flap 16 Sealing side bottom 17 Folding line 18 Sealing bottom end folding line 19 Opening opening 20 Perforation 21 Opening start hole 30 Blank area 31 Releasable adhesive application area 32 Document storage area 33 Binding hole 34 Ring binding binder 35 Strong adhesive paste layer 36 Release paper S Document

Claims (3)

An easily openable envelope comprising an easily openable means by perforations, a sealing means by a peelable adhesive having no re-adhesion, and a means for preventing movement of documents in the envelope,
The easy-opening means is provided with a perforation that linearly crosses the top part, the side part, and the lower part of the glue at a certain interval in the opening side flap direction from the sealing side bottom end folding line of the envelope, and the top part Each of which is provided with an opening opening hole at a position where the perforation intersects with the folding line provided at the boundary between the side part and the top part and the bottom part of the glue,
The sealing means and the movement preventing means include a peelable adhesive that linearly crosses the top portion, the side portion, and the lower portion of the glue, leaving a blank area having a constant width in the opening side flap direction from the position where the perforation is provided. Provided with a coating area,
Breaking the perforation facilitates the opening of the envelope, and providing the peelable adhesive application area ensures the sealing of the area in which the document in the envelope is stored, and the document in the envelope An easily openable envelope characterized by restricting the movement of the to the perforated side.   The easy-open envelope according to claim 1, wherein a binding hole is arranged in a blank area of the envelope along a perforation. While providing a strong adhesive paste layer covered with release paper on the inside of the opening side flap of the envelope, and providing a strong adhesive paste layer on the inside of the sealing side bottom of the envelope, each can be attached The easily openable envelope according to claim 1 or 2, wherein the envelope is easily opened.