Envelope manufacturing device

Abstract

To provide an envelope 1 in which a first zipper breaking line 6 formed on a folding line 3 has a low risk of being torn before opening and the first zipper breaking line 6 and a second zipper breaking line 7 are smoothly cut when opening, and to provide a manufacturing device for such an envelope.SOLUTION: An envelope 1 includes: a main body 2; a sealing piece 4; a double-sided tape having a release sheet 5 attached to the sealing piece 4; a first zipper breaking line 6 formed on a folding line 3; a second zipper breaking line 7 formed on a line parallel to the folding line 3; and a tear-off tape 8 attached to the sealing piece 4 along the folding line 3, in which the first zipper breaking line 6 has short cuts at first intervals and the second zipper breaking line 7 has long cuts at second intervals, and the length of the short cuts is 0.2 to 1.2 mm, the first intervals are 1 to 2 mm, the length of the long cuts is 1.5n to 2.5 mm, and the second intervals are 0.5 to 1.5 mm.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention forms two zipper breaking lines on the folding line of the sealing piece formed at the opening of the envelope and on a line parallel to the folding line, and attaches an opening tape to the sealing piece along the folding line. Manufacturing an envelope sealing Tube manufacturing manufacturing device.

Background Art

[0002] Patent Document 1 (Japanese Patent No. 4039573) forms a cutting hole (2a) such as a perforation at the fold of the sealing piece (2) of the envelope (1), stretches a wire material (3) such as a thread or a tape along the inside of the fold, and forms a cut piece (4) at the corner of the envelope (1). Thus, after separating the cut piece (4) from the envelope (1), it is cut along the fold where the cutting hole (2a) is formed by the wire material (3) so that it can be easily opened (see FIGS. 1 to 5, etc.). Patent Document 2 (Japanese Unexamined Patent Application Publication No. 2018-1426) describes an envelope processing device for manufacturing such an envelope.

[0003] Further, Patent Document 3 (Japanese Unexamined Patent Application Publication No. 2021-11317) forms an opening zipper (8) consisting of two separation lines (9) parallel to the sealing piece (5), provides one separation line (9) on the folding line (4) at the upper part of the cover (1), and by pinching the knob part (10) of the opening zipper (8) and pulling it up along the separation line (9), an envelope with an opening zipper that can be easily opened is described.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

SUMMARY OF THE INVENTION

PROBLEMS TO BE SOLVED BY THE INVENTION

[0005] However, since the envelopes described in Patent Documents 1 and 2 are cut along the fold line formed with the cutting hole (2a) by the wire (3), it is necessary to use a thread or a tape with a very narrow width for the wire (3). If the length and width of the cutting hole (2a) formed in the fold line are large, there is a risk that the fold line will tear before opening when the documents or the like accommodated in the envelope (1) are thick. In addition, for the envelope with an opening zipper described in Patent Document 3, since it is necessary to make the strengths of the two parallel separation lines (9) the same, if the strength is too low, similar to the envelopes described in Patent Documents 1 and 2, there is a risk that the fold line (4) will tear before opening when the documents or the like accommodated in the envelope are thick. If the strength is too high, the two separation lines (9) may not be smoothly cut during opening.

[0006] The present invention solves these problems, has a low risk of tearing the fold zipper breaking line formed on the fold line before opening, and a smooth cutting of the two separation lines during opening. Of the tube It is an object of the present invention to provide a manufacturing apparatus.

MEANS FOR SOLVING THE PROBLEMS

[0012] The invention according to claim 1 is A bent portion zipper break line formed on the bending line of the sealing piece provided at the opening of the envelope, and A sealing portion zipper break line formed on a line parallel to the bending line of the sealing piece, and An opening tape attached to the sealing piece along the bending line, The bent portion zipper break line is formed with short cuts at a first interval, The sealing portion zipper break line is formed with long cuts at a second interval, The length of the short cut is 0.2 to 1.2 mm, the first interval is 1 to 2 mm, the length of the long cut is 1.5 to 2.5 mm, and the second interval is 0.5 to 1.5 mm An envelope manufacturing apparatus for manufacturing an envelope, envelope conveying means for conveying envelopes one by one in the longitudinal direction of the sealing piece with the back side of the envelope facing up, a zipper processing means for forming a zipper break line of a folding portion on the fold line of the sealing piece being conveyed by the envelope conveying means, and forming a zipper break line of a sealing portion on a line parallel to the fold line; a tape attaching means for attaching a tape for opening to the envelope conveyed by the envelope conveying means along the folding line and cutting the left and right ends of the envelope, the tape attaching means being disposed downstream of the zipper processing means; The zipper processing means includes a cylindrical magnet cylinder whose peripheral surface rotates in the conveying direction while contacting the front side of the envelope seal being conveyed by the envelope conveying means, and a cylindrical anvil roll which contacts the upper surface of the magnet cylinder; The magnetic cylinder has a circumferential surface including a cutter section for a zipper break line at a folding portion, the cutter section having short straight blades formed at a first interval, and a cutter section for a zipper break line at a sealing portion, the cutter section having long straight blades formed at a second interval, The length of the short straight blade is 0.2 to 1.2 mm, the first interval is 1 to 2 mm, the length of the long straight blade is 1.5 to 2.5 mm, and the second interval is 0.5 to 1.5 mm. Effect of the Invention

[0018] Claim 1 According to the invention, A bent portion zipper break line formed on the bending line of the sealing piece provided at the opening of the envelope, a sealing portion zipper break line formed on a line parallel to the bending line of the sealing piece, and an opening tape attached to the sealing piece along the bending line, The bent portion zipper break line is formed with short cuts at a first interval, the sealing portion zipper break line is formed with long cuts at a second interval, the length of the short cut is 0.2 to 1.2 mm, the first interval is 1 to 2 mm, the length of the long cut is 1.5 to 2.5 mm, and the second interval is 0.5 to 1.5 mm The production efficiency of envelopes can be improved. In particular, the zipper processing means has a cylindrical magnet cylinder whose peripheral surface rotates in the conveying direction while contacting the front side of the seal piece conveyed by the envelope conveying means, and a cylindrical anvil roll in contact with the upper surface of the magnet cylinder, and the peripheral surface of the magnet cylinder has a cutter section for the zipper break line of the folded portion having short straight blades formed at a first interval, and a cutter section for the zipper break line of the sealing portion having long straight blades formed at a second interval, so that the zipper break line of the folded portion and the zipper break line of the sealing portion can be formed in a single process and the positioning of both zipper break lines is also easy. And, the envelope manufactured by the envelope manufacturing apparatus according to claim 1 has a short cut length of the bent portion zipper break line formed on the bending line of 0.2 to 1.2 mm and a first interval of 1 to 2 mm, and since the bent portion zipper break line is difficult to be cut, the risk of the bent portion zipper break line tearing before opening is low. Also, since the length of the long cut of the sealing portion zipper break line formed on the line parallel to the bending line is 1.5 to 2.5 mm and the second interval is 0.5 to 1.5 mm, the sealing portion zipper break line is easy to be cut. Furthermore, since the opening tape is attached to the sealing piece along the bending line, when the opening tape is pulled up during opening, the bent portion zipper break line is surely cut, and along with the cutting of the bent portion zipper break line, the sealing portion zipper break line which is easy to be cut is also smoothly cut.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Modes for Carrying Out the Invention

[0020] Hereinafter, embodiments of the present invention will be described by way of examples.

Examples

[0021] FIG. 1 is a perspective view of the envelope 1 of Example 1, and FIG. 2 is a plan view of the sealing piece 4 side in the state where the envelope 1 of Example 1 is sealed. The envelope 1 of Example 1 includes a main body 2 having a front surface portion (the lower side in FIG. 1) and a back surface portion (the upper side in FIG. 1) and being closed at the lower part, and a sealing piece 4 that extends upward from the main body 2 and closes and seals the opening of the main body 2 by being bent along the bending line 3. On the back side of the sealing piece 4, a double-sided tape is attached along the upper side. After putting the stored items through the opening of the main body 2, the release sheet 5 of the double-sided tape is peeled off to expose the adhesive layer, and the sealing piece 4 is bent along the folding line 3, and the adhesive layer is attached to the back surface portion of the main body 2, so that the envelope 1 can be easily sealed. Also, a first zipper breaking line 6 is formed on the folding line 3 of the sealing piece 4, a second zipper breaking line 7 is formed on a line parallel to the folding line 3, and an opening tape 8 is adhered to the back side of the sealing piece 4 along the folding line 3 between the first zipper breaking line 6 and the second zipper breaking line 7.

[0022] As shown in FIG. 2, the first zipper breaking line 6 and the second zipper breaking line 7 have tape gripping cuts 9 and 10 for gripping the opening tape 8 at both ends. And, on the first zipper breaking line 6, short cuts 11 are formed at a first interval 12 from the tape gripping cut 9 at one end (the left end in FIG. 2) toward the tape gripping cut 10 at the other end (the right end in FIG. 2). Similarly, on the second zipper breaking line 7, long cuts 13 are formed at a second interval 14 from the tape gripping cut 9 at one end toward the tape gripping cut 10 at the other end. In Example 1, the tape gripping cuts 9 and 10 are 5 mm, the short cuts 11 are 1 mm, the first interval 12 is 1 mm, the long cuts 13 are 2 mm, and the second interval 14 is 1 mm. However, the lengths of the tape gripping cuts 9 and 10 are 2 to 7 mm, the lengths of the short cuts 11 are 0.2 to 1.2 mm, the first interval 12 is 1 to 2 mm, the lengths of the long cuts 13 are 1.5 to 2.5 mm, and the second interval 14 is 0.5 to 1.5 mm. They can be appropriately selected and determined while considering the material, thickness, user requirements, etc. of the envelope 1. For example, when the envelope 1 is thin or the user desires the tear resistance of the first zipper breaking line 6, the length of the short cut 11 is selected from the range of 0.2 to 0.5 mm, the first interval 12 is 1.5 to 2 mm, the length of the long cut 13 is 1.5 to 2 mm, and the second interval 14 is 1 to 1.5 mm. When the envelope 1 is thick or the user desires easy opening of the envelope 1, the length of the short cut 11 is selected from the range of 0.5 to 1.2 mm, the first interval 12 is 1 to 1.5 mm, the length of the long cut 13 is 2 to 2.5 mm, and the second interval 14 is 0.5 to 1 mm.

[0023] A method of using the envelope 1 of Example 1 having the above configuration will be described. When enclosing items such as documents in the envelope 1, after putting the items into the opening of the main body 2, peel off the release sheet 5 of the sealing piece 4 to expose the adhesive layer, fold the sealing piece 4 along the folding line 3 to the back side, and adhere the adhesive layer to the back surface portion of the main body 2 to seal. When opening the envelope 1 with the items enclosed, place the thumb of the right hand between the first zipper breaking line 6 and the second zipper breaking line 7 at the left end of the sealing piece 4 and lift the sealing piece 4. Then, the portion sandwiched between the two tape gripping cuts 9 will bend. By pinching this portion, the opening tape 8 adhered to the back side of the sealing piece 4 can be gripped. After that, when pulling the opening tape 8 upward and to the upper right, since the opening tape 8 is adhered to the sealing piece along the folding line 3, the first zipper breaking line 6 will be surely cut. Along with the cutting of the first zipper breaking line 6, the second zipper breaking line 7 will also be smoothly cut, and the envelope 1 can be easily opened. Also, place the thumb of the left hand between the first zipper breaking line 6 and the second zipper breaking line 7 at the right end of the sealing piece 4 and lift the sealing piece 4. Then, the portion sandwiched between the two tape gripping cuts 10 will bend. So, the opening tape 8 can be gripped in the same way as when lifting it with the right hand. After that, when pulling the opening tape 8 upward and to the upper left, the first zipper breaking line 6 will be surely cut in the same way as when pulling the opening tape 8 upward and to the upper right with the right hand, and the second zipper breaking line 7 will also be smoothly cut. Therefore, the envelope 1 can be easily opened with the left hand as well.

Example

[0024] Figure 3 is a plan view of the sealing piece 4 side in the state where the envelope 15 of Example 2 is sealed. The envelope 15 of Example 2 has a third zipper breaking line 18 with tape gripping inclined cuts 16 and 17 in which the tape gripping cuts 9 and 10 are inclined downward instead of the second zipper breaking line 7 in the envelope 1 (Figure 2) of Example 1, and has triangular notches 19 between the left and right ends of the sealing piece 4 and both ends of the third zipper breaking line 18, which is different from the envelope 1 of Example 1. And since the other configurations and usage methods are the same as those of Example 1, detailed descriptions are omitted, and the same numbers as in Figures 1 and 2 are used for the numbers other than the envelope 15, the tape gripping inclined cuts 16 and 17, the third zipper breaking line 18, and the notch 19.

Example

[0025] Figure 4 is a plan view of the sealing piece 4 side in the state where the envelope 20 of Example 3 is sealed. The envelope 20 of Example 3 has no tape gripping cuts 9 and 10, but instead has a fourth zipper breaking line 21 with only short cuts 11 and a first interval 12 and a fifth zipper breaking line 22 with only long cuts 13 and a second interval 14, instead of the first zipper breaking line 6 and the second zipper breaking line 7 in the envelope 1 (Figure 2) of Example 1, and is different from the envelope 1 of Example 1 in that the unsealing tape 8 protrudes from the left and right ends of the sealing piece 4. And since the other configurations and the usage method when enclosing storage items such as documents in the envelope 20 are the same as those of Example 1, detailed descriptions are omitted, and the same numbers as in Figures 1 and 2 are used for the numbers other than the envelope 20, the fourth zipper breaking line 21, and the fifth zipper breaking line 22.

[0026] When opening the envelope 20 containing the item to be stored, when the thumb of the right hand is placed on the left end of the unsealing tape 8 protruding from the left and right ends of the sealing piece 4 and pinched, the unsealing tape 8 adhered to the back side of the sealing piece 4 can be grasped. Then, when the unsealing tape 8 is pulled upward to the upper right, since the unsealing tape 8 is adhered to the sealing piece along the folding line 3, the fourth zipper breaking line 21 is surely cut, and along with the cutting of the fourth zipper breaking line 21, the fifth zipper breaking line 22 is also smoothly cut, and the envelope 20 can be easily opened. Also, when the thumb of the left hand is placed on the right end of the unsealing tape 8 and pinched, the unsealing tape 8 can be grasped in the same manner as when pinched with the right hand. Then, when the unsealing tape 8 is pulled upward to the upper left, the fourth zipper breaking line 21 is surely cut in the same manner as when the unsealing tape 8 is pulled upward to the upper right with the right hand, and the fifth zipper breaking line 22 is also smoothly cut, so the left hand can also easily open the envelope 20.

Example

[0027] Figure 5 is a plan view of the sealing piece 4 side in the state where the envelope 23 of Example 4 is sealed. The envelope 23 of Example 4, in addition to the first zipper breaking line 6 and the second zipper breaking line 7 in the envelope 1 (Figure 2) of Example 1, is provided with a first cut 24 extending from the first zipper breaking line 6 toward the second zipper breaking line 7 side, and a second cut 25 extending from the second zipper breaking line 7 toward the first zipper breaking line 6 side. The first cut 24 and the second cut 25 are different from the envelope 1 of Example 1 in that they do not intersect and connect with each other. And since the other configurations and the usage method when enclosing items to be stored such as documents in the envelope 23 are the same as those in Example 1, a detailed description is omitted, and the same numbers as those in Figures 1 and 2 are used for the numbers other than the envelope 23, the first cut 24, and the second cut 25.

[0028] When opening the envelope 23 containing the item to be stored, similar to the envelope 1 of Example 1, when pinching the bent portion at the left end of the sealing piece 4 with the thumb and index finger of the right hand, the opening tape 8 attached to the back side of the sealing piece 4 can be grasped. By pulling up the opening tape 8 diagonally upward to the upper right, the first zipper breaking line 6 and the second zipper breaking line 7 can be smoothly cut, and the envelope 23 can be easily opened. Also, with the left hand, similar to the envelope 1 of Example 1, by pulling up the opening tape 8 diagonally upward to the upper left, the first zipper breaking line 6 and the second zipper breaking line 7 can be smoothly cut, and the envelope 23 can be easily opened. Furthermore, since the envelope 23 of Example 4 has the first cut 24 and the second cut 25, when pulling up the opening tape 8 diagonally upward to the upper right or left, a breaking sound with a pitch corresponding to the horizontal interval between the first cut 24 and the second cut 25 can be generated. The pitch of the breaking sound also varies depending on the material and thickness of the envelope 23. However, if the horizontal interval between the first cut 24 and the second cut 25 is reduced, a high-pitched breaking sound is generated, and if the interval is increased, a low-pitched breaking sound is generated. Therefore, the breaking sound can be controlled.

Example

[0029] FIG. 6 is a plan view of the sealing piece 4 side in a state where the envelope 26 of Example 5 is sealed. The envelope 26 of Example 5 is the same as the envelope 20 (Fig. 4) of Example 3. Instead of the first zipper break line 6 and the second zipper break line 7 in the envelope 1 of Example 1, it is provided with a tape gripping cut 9 and 10, but instead has a short cut 11 and a fourth zipper break line 21 having only the first interval 12, and a long cut 13 and a fifth zipper break line 22 having only the second interval 14. Further, it is different from the envelope 1 of Example 1 in that a dividing line 27 is provided at both corner portions on the opening side of the envelope 26 to form a cut piece 28, and a Braille portion 29 is provided in the vicinity of the cut piece 28. And since the other configurations and the usage method when enclosing storage items such as documents in the envelope 26 are the same as those in Example 1, a detailed description is omitted. The fourth zipper break line 21 and the fifth zipper break line 22 have the same numbers as in Fig. 4, and the same numbers as in Figs. 1 and 2 are used for the numbers other than the envelope 26, the dividing line 27, the cut piece 28, and the Braille portion 29.

[0030] When opening the envelope 26 with the storage items enclosed, if either the left or right cut piece 28 is pinched with the thumb and index finger and broken from the envelope 26 along the dividing line 27, the opening tape 8 will be in a gripped state. So, by simply pulling up the cut piece 28 diagonally upward to the upper right or upper left, the fourth zipper break line 21 and the fifth zipper break line 22 can be smoothly cut, and the envelope 26 can be easily opened. Also, since the Braille portion 29 is formed in the vicinity of the cut piece 28, even visually impaired persons can immediately recognize the position of the cut piece 28, and the envelope 26 can be easily opened without using tools such as cutters.

[0031] Fig. 7 is a perspective view of an envelope manufacturing apparatus 30 for manufacturing the envelope 26 of Example 5, Fig. 8 is a plan view of the envelope manufacturing apparatus 30, and Fig. 9 is a side view of the envelope manufacturing apparatus 30. As shown in Figs. 7 to 9, the envelope manufacturing apparatus 30 is provided with the following means (1) to (8). (1) A double-sided tape composed of a body 2 and a sealing piece 4, having a release sheet 5, and the application of an unsealing tape 8, and a plurality of envelopes without the formation of a fourth zipper breaking line 21, a fifth zipper breaking line 22, a dividing line 27, a cut piece 28, and a braille portion 29 are set, and an envelope feeding means 31 for feeding the set envelopes one by one with the back side up from one side edge. (2) An envelope conveying means 32 for conveying the envelopes fed from the envelope feeding means 31 one by one in the longitudinal direction of the sealing piece 4 (the left-right direction of the envelope). (3) A sealing piece opening means 33 for forcibly opening the sealing piece 4 of the conveyed envelope.

[0032] (4) With the sealing piece 4 opened, while conveying the envelope in the longitudinal direction of the sealing piece 4 (the left-right direction of the envelope), a fourth zipper breaking line 21 is formed on the folding line 3, and at the same time, a fifth zipper breaking line 22 is formed on a line parallel to the folding line 3 with respect to the sealing piece 4, and an arc-shaped dividing line 27 is formed across the folding line 3 with respect to the side edge portions of the sealing piece 4 and the body 2, a zipper processing means 34. Note that the zipper processing means 34 has a cylindrical magnet cylinder 35 extending in the width direction of the envelope manufacturing apparatus 30 at the lower part, a cylindrical anvil roll 36 in contact with the upper surface of the magnet cylinder 35, and a pressure adjusting portion 37 for adjusting the contact pressure between the magnet cylinder 35 and the anvil roll 36. And on the cylindrical surface of the magnet cylinder 35, a fourth zipper breaking line cutter portion composed of blades for forming the fourth zipper breaking line 21 (blades having a length corresponding to the short cut 11 are arranged at intervals of the first interval 12), and a fifth zipper breaking line cutter portion composed of blades for forming the fifth zipper breaking line 22 (blades having a length corresponding to the long cut 13 are arranged at intervals of the second interval 14) are provided in parallel at a predetermined interval (about 4 times the tape width when the unsealing tape 8 is a thin nylon tape, about 2 times the tape width when the unsealing tape 8 is a thick paper tape), and further, two dividing line cutter portions composed of blades for forming the dividing line 27 (blades corresponding to the dividing line 27 are arranged in an arc shape) are provided. Therefore, the circumference of the magnet cylinder 35 is set to be slightly larger than the width of the envelope 26.

[0033] (5) Sealing tape attaching means 38 for attaching the opening tape 8 to the sealing piece 4 of the envelope after zipper processing along the folding line 3 and cutting at the left and right ends of the sealing piece 4. (6) Double-sided tape attaching means 39 for attaching a double-sided tape having a release sheet 5 along the upper side between the fifth zipper breaking line 22 and the upper side of the sealing piece 4 to the sealing piece 4 to which the opening tape 8 is attached and cutting slightly inside both ends of the sealing piece 4. (7) Braille portion forming means 40 for forming a braille portion 29 (the braille character "Aku" in FIG. 6) indicating the presence of the cut piece 28 in the vicinity of the dividing line 27 (the region surrounded by the fourth zipper breaking line 21, the fifth zipper breaking line 22, and the dividing line 27 in FIG. 6) on the sealing piece 4 to which the double-sided tape is attached. (8) Envelope sending means 41 for sending out the completed envelope 26 with the braille portion 29 formed in a state of standing horizontally.

[0034] List modification examples regarding the envelopes of Examples 1 to 5. (Modification Example 1) In Examples 1 to 5, a double-sided tape having a release sheet 5 was attached to the back side of the sealing piece 4, but after forming an adhesive layer on the back side of the sealing piece 4, the release sheet 5 may be attached to the surface of the adhesive layer. (Modification Example 2) The first zipper breaking line 6 and the second zipper breaking line 7 in the envelope 1 of Example 1 (FIG. 2) and the envelope 23 of Example 4 (FIG. 5) have tape gripping cuts 9 and 10 for gripping the opening tape 8 at both ends. The first zipper breaking line 6 and the third zipper breaking line 18 in the envelope 15 of Example 2 (FIG. 3) have tape gripping cuts 9, 10, 16, and 17 for gripping the opening tape 8 at both ends. However, since the opening tape 8 can also be gripped with fingertips to lift the sealing piece 4, the tape gripping cuts 9, 10 or 9, 10, 16, 17 may not be provided. Also, it may have tape gripping cuts 9 and 16 only at one end, or tape gripping cuts 10 and 17 only at the other end. (Modification Example 3) In the envelope 15 (Fig. 3) of Example 2, the third zipper breaking line 18 having the tape gripping inclined cuts 16 and 17 was used, but the second zipper breaking line 7 having the tape gripping cuts 9 and 10 in the envelope 1 of Example 1 may also be used. However, since the envelope 15 has the notch 19, the tape gripping cuts 9 and 10 do not have to reach the left and right end portions (the tip portions of the notch 19) of the sealing piece 4. As can be understood from the descriptions of Examples 1 to 5 and Modification Examples 2 and 3, in Examples 1, 2, 4, and Modification Example 3, the first zipper breaking line 6 is formed on the folding line 3, and in Examples 3, 5, and Modification Example 2, the fourth zipper breaking line 21 is formed on the folding line 3. In Examples 1, 4, and Modification Example 3, the second zipper breaking line 7 is formed on a line parallel to the folding line 3. In Example 2, the third zipper breaking line 18 is formed on a line parallel to the folding line 3. In Examples 3, 5, and Modification Example 2, the fifth zipper breaking line 22 is formed on a line parallel to the folding line 3. Therefore, in the claims, the zipper breaking line formed on the folding line 3 shall be collectively referred to as the "folding part zipper breaking line", and the zipper breaking line formed on the line parallel to the folding line 3 of the sealing piece 4 shall be collectively referred to as the "sealing part zipper breaking line".

[0035] (Modification Example 4) The envelope manufacturing apparatus 30 (Figs. 7 to 9) according to Example 5 was provided with the envelope feeding means 31. However, if the envelope can be directly fed by hand to the envelope conveying means 32, the envelope feeding means 31 becomes unnecessary. Further, if an envelope with the sealing piece 4 opened is set in the envelope feeding means 31, or an envelope with the sealing piece 4 opened is fed to the envelope conveying means 32, the envelope can be conveyed with the sealing piece 4 opened and the back side facing up, so the sealing piece opening means 33 does not have to be provided. (Modification Example 5) The magnet cylinder 35 of the envelope manufacturing apparatus 30 according to Example 5 had a fourth zipper breaking line cutter part consisting of a blade for forming the fourth zipper breaking line 21 on its cylindrical surface and a fifth zipper breaking line cutter part consisting of a blade for forming the fifth zipper breaking line 22. However, when manufacturing the envelope 1 of Example 1, the envelope 15 of Example 2, and the envelope 23 of Example 4, it is necessary to change the fourth zipper breaking line cutter part and the fifth zipper breaking line cutter part as follows. <When manufacturing the envelope 1 (Fig. 2) of Example 1> The blades near both ends of the blade for forming the fourth zipper breaking line 21 and the blade for forming the fifth zipper breaking line 22 were changed to a first zipper breaking line cutter part and a second zipper breaking line cutter part with blades having lengths corresponding to the tape gripping cuts 9 and 10. <When manufacturing the envelope 15 (Fig. 3) of Example 2> The blades near both ends of the blade for forming the fourth zipper breaking line 21 were changed to a first zipper breaking line cutter part with blades having lengths corresponding to the tape gripping cuts 9 and 10, and the blades near both ends of the blade for forming the fifth zipper breaking line 22 were changed to a third zipper breaking line cutter part with inclined blades having lengths corresponding to the tape gripping inclined cuts 16 and 17. <When manufacturing the envelope 23 (Fig. 5) of Example 4> The blade with a length corresponding to the first cut 24 was changed to a first zipper breaking line and first cut cutter part added so as to be orthogonal to the blade forming the first zipper breaking line 6, and the blade with a length corresponding to the second cut 25 was changed to a second zipper breaking line and second cut cutter part added so as to be orthogonal to the blade forming the second zipper breaking line 7.

[0036] (Modification Example 6) The envelope manufacturing apparatus 30 according to Example 5 was equipped with double-sided tape sticking means 39. However, the double-sided tape having the release sheet 5 facilitates the adhesion of the sealing piece 4 to the back surface part of the main body 2 when folding along the folding line 3 when enclosing items such as documents in the envelope 1, and is not related to the opening of the envelope 26. Therefore, the double-sided tape sticking means 39 may not be provided. (7) The envelope manufacturing apparatus 30 according to Example 5 was provided with a Braille portion forming means 40. However, since the envelopes 2, 3, 20, 23 (Figs. 2 to 5) of Examples 1 to 4 do not have Braille portions formed thereon, when manufacturing these envelopes, the Braille portion forming means 40 may not be provided. (8) The envelope manufacturing apparatus 30 according to Example 5 was provided with an envelope sending-out means 41. However, when it is not necessary to send out the envelope 26 in a state where it stands sideways and it is only necessary to stack it flat, a stocker for dropping and accommodating the envelope 26 sent out from the envelope conveying means 32 may be provided. When manually packing the envelopes into boxes as they are, nothing needs to be provided.

Explanation of Reference Numerals

[0037] 1: Envelope of Example 1 2: Main body 3: Fold line 4: Sealing piece 5: Release sheet 6: First zipper breaking line 7: Second zipper breaking line 8: Opening tape 9, 10: Cuts for tape gripping 11: Short cut 12: First interval 13: Long cut 14: Second interval 15: Envelope of Example 2 16, 17: Tilted cuts for tape gripping 18: Third zipper breaking line 19: Notch 20: Envelope of Example 3 21: Fourth zipper breaking line 22: Fifth zipper breaking line 23: Envelope of Example 4 24: First cut 25: Second cut 26: Envelope of Example 5 27: Separation line 28: Cut-off piece 29: Braille portion 30: Envelope manufacturing apparatus 31: Envelope feeding means 32: Envelope conveying means 33: Sealing piece opening means 34: Zipper processing means 35: Magnet cylinder 36: Anvil roll 37: Pressure adjustment unit 38: Opening tape attaching means 39: Double-sided tape attaching means 40: Braille portion forming means 41: Envelope sending-out means

Claims

Claim 1: A folding portion zipper break line formed on a folding line of a sealing piece provided at an opening of an envelope, A sealing portion zipper break line formed on a line parallel to the folding line of the sealing piece, An opening tape attached to the sealing piece along the folding line, The folding portion zipper break line has short cuts formed at a first interval, The sealing portion zipper break line has long cuts formed at a second interval, An envelope manufacturing apparatus for manufacturing an envelope, wherein the length of the short cut is 0.2 to 1.2 mm, the first interval is 1 to 2 mm, the length of the long cut is 1.5 to 2.5 mm, and the second interval is 0.5 to 1.5 mm, An envelope conveying means for conveying envelopes one by one with the back side of the envelope facing up in the longitudinal direction of the sealing piece, Zipper processing means for forming a folding portion zipper break line on the folding line and a sealing portion zipper break line on a line parallel to the folding line with respect to the sealing piece conveyed by the envelope conveying means, An opening tape attaching means installed downstream of the zipper processing means for attaching an opening tape along the folding line to the sealing piece conveyed by the envelope conveying means and cutting the opening tape at the left and right ends of the sealing piece, The zipper processing means has a cylindrical magnet cylinder whose peripheral surface rotates in the conveying direction while contacting the front surface side of the sealing piece conveyed by the envelope conveying means, and a cylindrical anvil roll contacting the upper surface of the magnet cylinder, On the peripheral surface of the magnet cylinder, there are a cutter portion for the folding portion zipper break line in which short straight blades are formed at a first interval and a cutter portion for the sealing portion zipper break line in which long straight blades are formed at a second interval, The length of the short straight blade is 0.2 to 1.2 mm, the first interval is 1 to 2 mm, the length of the long straight blade is 1.5 to 2.5 mm, and the second interval is 0.5 to 1.5 mm Characterized by the above envelope manufacturing apparatus.

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