Window envelope

Abstract

The present invention aims to provide a windowed envelope in which the sender's name is printed on the contents enclosed, such as a delivery slip, and the recipient of the envelope can visually identify the sender's address, name, etc., without having to print them on the back of the envelope, as long as the contents are enclosed. [Solution] The present invention comprises an envelope body formed in a rectangular shape, with three sides of the rectangle closed and one side open for inserting an item, a translucent address window provided at a predetermined position on the front surface of the envelope body and sized to be sufficient for displaying the recipient's address, and a translucent sender window provided at a predetermined position on the back surface of the envelope body and sized to be sufficient for displaying the sender's address.

Description

Technical Field

[0001] The present invention relates to an envelope, and particularly to an envelope with a window that can透视 a part of the enclosed item.

Background Art

[0002] Generally, envelopes of various shapes and structures are used. For example, an envelope with a window provided on the front surface (outer surface) of the envelope, through which a part of the interior can be透视, is also used. According to this envelope with a window, the name and address of the recipient can be透视, which is extremely convenient.

[0003] As a conventional envelope with a window, for example, Patent Document 1 is known. As described in Patent Document 1, a window is provided on the front surface (outer surface) of the envelope. When using the conventional example described in Patent Document 1, the name printed on the enclosed item such as a delivery note enclosed in the envelope can be visually recognized through the transparent part, so there is an advantage that there is no need to write the name on the envelope.

[0004] However, in the envelope of Patent Document 1, since the address and name of the sender cannot be透视, it is necessary to handwrite or print the address and name of the sender on the back of the envelope.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In the envelope with a window of Patent Document 1, it is necessary to print or handwrite the address, name, etc. of the sender on the back of the envelope, and this printing work and handwriting work are complicated, and there is a problem that this complexity needs to be eliminated.

[0007] It should be noted that the term "透视" in the original text seems to be an incorrect or unclear expression. I have translated it as "透视" for the purpose of maintaining the integrity of the text, but it may need to be further clarified or corrected in the original context. The present invention aims to provide a windowed envelope that eliminates the need to print or handwrite the sender's address, name, etc., on the back of the envelope. [Means for solving the problem]

[0008] The present invention relates to a windowed envelope comprising: an envelope body formed in a rectangular shape, with three sides of the rectangular shape closed and one side open for inserting an item; a translucent address window provided at a predetermined position on the front surface of the envelope body, which is large enough to display the recipient's address; and a translucent sender window provided at a predetermined position on the back surface of the envelope body, which is large enough to display the sender's address.

[0009] In the present invention, it is preferable that the open-side flap provided on one of the open sides of the envelope body is located on the back side of the envelope body, allowing the recipient to insert the contents into the windowed envelope while visually checking the recipient's address on the contents, using the flap as a guide.

[0010] In the present invention, it is preferable that a stopper is provided to position the insertion point of the contents when inserting the contents from the open side of the windowed envelope, by contacting the insertion end of the contents.

[0011] In the present invention, it is preferable that a perforation is provided at the inner end position of the windowed envelope where the stopper is located, or slightly inside the windowed envelope from this inner end position, allowing the side of the windowed envelope on which the stopper is provided to be cut.

[0012] In the present invention, it is preferable that the front surface of the windowed envelope is provided with at least one of the following: a postage-related display frame, a postal code entry frame, the front surface of the windowed envelope, the address, the front surface of the envelope, the sender, the back surface of the front surface of the windowed envelope, and the back surface of the windowed envelope, the sender, etc.

[0013] In the present invention, it is preferable to have different external designs, such as shape and color, for the outer frame-shaped printed portion provided on the front surface of the envelope body and the outer frame-shaped printed portion provided on the back surface. [Effects of the Invention]

[0014] According to the present invention, if the sender's information is printed on the enclosed item, such as a quotation, to be enclosed in a windowed envelope, the sender's address, name, etc. can be displayed on the back of the envelope without having to print or handwrite it on the back of the envelope. This has the effect of freeing the sender from the cumbersome task of writing the sender's address, name, etc. on the back. [Brief explanation of the drawing]

[0015] [Figure 1] This is an unfolded view of the outer surface of an envelope showing one embodiment of the windowed envelope according to the present invention. [Figure 2] Figure 1 is an unfolded view of the inner surface of a windowed envelope in one embodiment. [Figure 3] Figure 1 is a front view of a windowed envelope in one embodiment, showing a portion of the envelope-shaped envelope with glue applied, except for one side on the side where the contents are inserted. [Figure 4] (A), (B), and (C) are cross-sectional views along lines AA, BB, and CC in Figure 3, respectively, with the inclusion inserted. [Figure 5] Figure 1 is a front view showing an example of an insert to be inserted into one embodiment. [Figure 6] This is a front view showing the front surface of a windowed envelope when the contents shown in Figure 5 are inserted into one embodiment of Figure 1. [Figure 7] This is a front view showing the back of a windowed envelope when the contents shown in Figure 5 are inserted into one embodiment of Figure 1. [Figure 8] This is a front view showing another embodiment of the windowed envelope according to the present invention. [Figure 9] This is a diagram showing the inner surface of an envelope, illustrating yet another embodiment of the windowed envelope according to the present invention, in which a camouflage pattern is printed on the inner surface of the envelope to prevent it from being see-through.

Best Mode for Carrying Out the Invention

[0016] An embodiment of the windowed envelope according to the present invention will be described based on FIGS. 1 to 7.

[0017] FIG. 1 shows a developed view of the outer surface of an envelope showing an embodiment of the windowed envelope according to the present invention, and FIG. 2 shows a developed view of the inner surface of the windowed envelope in the embodiment of FIG. 1. In the developed view showing the outer surface of the envelope in FIG. 1, the windowed envelope 10 according to the present embodiment includes an envelope body 20. The envelope body 20 includes a front surface 30 on the right side in the drawing where the addressee of the envelope is displayed, a back surface 40 on the left side in the drawing where the sender is displayed, a trapezoidal one-end sealing side folding piece 21 integrally provided above the front surface 30 in the drawing, a trapezoidal side sealing side folding piece 22 integrally provided on the right side of the front surface 30 in the drawing, and a trapezoidal other-end open side folding piece 23 integrally provided below the back surface 40 in the drawing.

[0018] In FIG. 1, between the front surface 30 and the back surface 40, between the one-end sealing side folding piece 21 and the front surface 30, between the side sealing side folding piece 22 and the front surface 30, and between the back surface 40 and the other-end open side folding piece 23, valley fold lines 24, 25, 26, 27 are provided respectively.

[0019] Among the folding pieces 21 to 23, the one-end sealing side folding piece 21 and the side sealing side folding piece 22 are used as margins for pasting when folding the envelope paper in the unfolded state and assembling it into an envelope. For example, an adhesive 55 such as glue is applied to the ranges 21A, 22A indicated by the chain lines in FIG. 2. Therefore, after the envelope body 20 is valley-folded along the fold line 24 in FIG. 1 and the front surface 30 and the back surface 40 of the envelope body 20 are opposed to each other, the one-end sealing side folding piece 21 and the side sealing side folding piece 22 are bonded to the back surface 40 to form the envelope body 20 into a tubular envelope. The folded flap 23 on the open end is a flap (tab) used when sealing the tubular envelope body 20 after inserting a predetermined item 70, which will be described later. The folded flap 23 on the open end may be provided with a sealing tape 23A, such as double-sided adhesive tape, as needed. When inserting the contents 70 into the envelope body 20, the recipient's address, name, etc., on the contents 70 can be visually confirmed, and the folded flap 23 on the open end can be used as a guide for insertion, thereby reliably preventing errors in inserting the contents 70.

[0020] In Figures 1 and 2, two trapezoidal notches 51 are provided at a predetermined interval from the upper end of the back surface 40, and these two notches 51 provide three protrusions 52 at the upper end of the back surface 40. These notches 51 and protrusions 52 are formed when the unfolded envelope paper is folded into an envelope along the fold line 24, as shown in Figure 1. When the front surface 30 and back surface 40 are overlapped and joined together, the folded-over piece 21 on one end that seals the envelope is then overlapped and glued to the outer surface, causing the notch 51 portion of the back surface 40 to be directly adhered to the inner surface of the front surface 30. As a result, the contents 70 cannot be inserted into the windowed envelope 10 through the adhesive surface via the notch 51. Therefore, the adhesive surface via the notch 51 functions as a stopper 50 that restricts the insertion position of the contents 70 when they are inserted, as described later.

[0021] A translucent address window 31 is provided slightly above the front surface 30, and an outer frame-shaped printed section 32 is provided around this address window 31 to cover the outer frame line of the address window 31 and to shape the outer form of the address window 31. The outer frame-shaped printed section 32 is printed with opaque ink. The address display window 31 is a window that displays the address written on the enclosed item 70, such as a delivery slip described later, when the enclosed item 70 is inserted into the envelope body 20.

[0022] The front side 30 is provided with, if necessary, a frame for displaying postage information 61, a frame for entering a postal code 62, and a text entry area 63. The text entry area 63 is provided to prevent the front and back of the envelope from becoming difficult to distinguish and the direction in which the contents 70 should be inserted, in cases where the frame for displaying postage information 61, the frame for entering a postal code 62, etc., are not provided. For example, text such as "front side" and "address" can be written on it. In this case, the text entry section 63 may be provided in addition to the fee-related display frame 61, postal code entry frame 62, etc., or conversely, only one of them may be provided. Additionally, the postage-related display frame 61 may be used as a stamp affixing frame, or it may be used with text such as "postage paid in advance" or "postage due later" printed on it.

[0023] On the reverse side 40, a translucent sender information window 41 is provided at a position that approximately overlaps with the address information window 31 on the front side 30 when the front side 30 and the reverse side 40 are folded together. Around this sender information window 41, an outer frame-shaped printed section 42 is provided to cover the outer frame line of the sender information window 41 and to shape the outer form of the sender information window 41. The outer frame-shaped printed section 42 is printed with opaque ink. In this case, the outer frame-shaped printed section 32 of the front surface 30 and the outer frame-shaped printed section 42 of the back surface 40 are not limited to single-color printing of the same shape, but may also have intermittent patterns or other patterns. In this case, by changing the appearance design such as the shape and color of the outer frame-shaped printed sections 32 and 42 of the front surface 30 and the back surface 40, the front and back of the windowed envelope 10 can be easily distinguished by these outer frame-shaped printed sections 32 and 42. In this embodiment, as shown in Figures 1 and 2, the outer frame-shaped printed section 32 of the front surface 30 is shown with a thick colored solid line, and the outer frame-shaped printed section 42 of the back surface 40 is shown with a thick colored dashed line. Furthermore, if the external design, such as the shape and color of the outer frame-shaped printed sections 32 and 42 on the front side 30 and the back side 40 is changed, it is not necessary to provide markings to distinguish the front side from the back side, such as the text entry section 63 on the front side 30 and the text entry section 64 on the back side 40. Even without these markings, the front and back sides of the windowed envelope 10 can be easily identified. In this embodiment, the sizes of the address window 31 and the sender window 41 are approximately the same. However, the sizes of the address window 31 and the sender window 41 may differ depending on the application, such as the size of the enclosed item 70 or the size of the windowed envelope 10, and the sizes are arbitrary. The sender information window 41 is a window that displays the sender's information written on the enclosed item 70, such as a quotation (described later), when the enclosed item 70 is inserted into the envelope body 20. To make the address window 31 and sender window 41 translucent, a so-called wax window, commonly used in windowed envelopes, can be used. The translucent address window 31 and sender window 41 are not limited to wax windows; cellophane or glassine paper may also be used. In this case, it is best to use plant-derived resins to impregnate the wax used in wax windows. Unlike petroleum-derived resins, plant-derived resins can be recycled as waste paper after use, or they decompose in the soil if buried, making them environmentally friendly. Furthermore, if the address window 31 and the sender's address window 41 are made of wax, unlike when cellophane or glassine paper is used, the insertion tip of the enclosed item 70 will not get caught on the address window 31 or the sender's address window 41, which has the advantage of allowing for smooth insertion. Furthermore, the size and placement of the address window 31 and the sender's address window 41 must conform to the guidelines for creating standard mail and postcards issued by Japan Post Co., Ltd.

[0024] Furthermore, the reverse side 40 is provided with a writing area 64, etc., as needed. The writing area 64 is provided to prevent it from becoming difficult to distinguish the front and back of the envelope and to prevent it from becoming difficult to determine the direction in which the enclosed item 70 should be inserted. For example, words such as "Reverse side" and "Sender" are written there. In this case, the words "back side" and "sender" may be printed in the text entry area 63 of the folded flap 21 on one end sealing side of the front side 30, as shown in Figure 1, and the words "sender" may be printed in the text entry area 63 of the folded flap 22 on the side sealing side. The position where the words "sender" are placed in the text entry area 63 of the folded flap 22 on the side sealing side should correspond to the sender display window 41 on the back side 40. Furthermore, the words "front side," "address," "back side," and "sender" should be printed in advance in the designated positions on the windowed envelope 10. Furthermore, the characters provided on the folded-over flap 22 on the side sealing side of the front surface 30 are not limited to "Sender," but may be other characters such as "Back," however, "Sender" is preferred in relation to the sender display window 41.

[0025] As described above, the address window 31 and the sender window 41 are positioned so that they almost overlap. Therefore, the length from the bottom edge of the envelope body 20 to the bottom edge of the sender window 41 is approximately the same as the length from the bottom edge of the envelope body 20 to the bottom edge of the address window 31. Also, since the size of the address window 31 and the sender window 41 are approximately the same, the length from the bottom edge of the sender window 41 to the top edge of the sender window 41 is approximately the same as the length from the bottom edge of the address window 31 to the top edge of the address window 31. In this case, if the contents 70 enclosed in the envelope body 20 are translucent, the contents of the contents 70 may be visible through both the address window 31 and the sender window 41, making it difficult to read the written characters. In this case, the position of the sender window 41 may be shifted downwards in the diagram, as shown by the dashed line in Figure 1, from the position opposite the address window 31.

[0026] In Figure 1, perforations 81 are provided continuously on the back surface 40, the front surface 30, and the folded flap 22 on the side sealing side, either at the bottom of the notch 51 on the back surface 40, that is, at a position that exactly coincides with the inner end position 50A of the stopper 50, or slightly inside the envelope body 20, that is, on the inside of the windowed envelope 10, from this inner end position 50A. Perforations 82 are also provided near the upper end of the folded flap 21 on the one-end sealing side. These perforations 82 are set to be symmetrical to perforations 81 with respect to the fold line 25 of the folded flap 21. Therefore, when the folded piece 21 is folded back around the fold line 25, the perforations 81 and 82 coincide perfectly. These perforations 81 and 82 allow the side of the windowed envelope 10 with the stopper 50 to be easily cut along the perforations 81 and 82. At this time, since the insert position of the enclosed item 70 is held in place by the stopper 50, the tip of the enclosed item 70 will not be cut when cutting along the perforations 81 and 82. In addition, when the perforation 81 is located slightly inside the windowed envelope 10 from the inner edge position 50A, "slightly" means less than 1 mm.

[0027] In the unfolded view of the inside of the envelope shown in Figure 2, the inner surface of the front surface 30 (the surface that becomes the inside of the envelope) is provided with the address display window 31, and the inner surface of the back surface 40 (the surface that becomes the inside of the envelope) is provided with the sender display window 41.

[0028] Figure 3 is a front view showing a portion of the front surface 30 of the completed envelope, created by folding the unfolded envelope body 20. Figures 4(A), (B), and (C) are cross-sectional views along lines AA, BB, and CC in Figure 3, respectively, with the contents 70 inserted. The shapes are slightly exaggerated to make the cross-sectional shapes easier to understand.

[0029] To complete the unfolded envelope body 20 into the envelope shown in Figure 3, first, the envelope body 20 is valley-folded along the fold line 24 in the center of Figure 2 in the direction of arrow (1), and then the folded flap 22 on the open end is valley-folded along the fold line 26 in the direction of arrow (2), and the folded flap 22 and the outer surface of the back surface 40 are bonded together with an adhesive such as glue 55 applied to area 22A. Next, the folded-over piece 21 on one end that is sealed is folded in the direction of arrow (3) along the fold line 25, and the folded-over piece 21 and the outer surface of the back surface 40 are bonded together with the adhesive 55 such as glue applied to the area 21A.

[0030] When the envelope body 20 is completed as an envelope, the portion of the back surface 40 with a notch 51 located at the top of the back surface 40 is partially removed. Therefore, the adhesive 55 applied to the area 21A of the folded flap 21 does not adhere to the back surface 40, but directly adheres to the inner surface of the front surface 30. This state is shown by cutting out a portion of Figure 3, which is shown in Figures 4(A) and (C). In Figure 4(A), the leading end of the enclosed item 70 that is inserted into the envelope body 20 cannot be inserted any further once a portion of the folded flap 21 is directly adhered to the inner surface of the front surface 30 via the notch 51. In other words, the inner end of the adhesive portion of the notch 51 functions as a stopper 50. Figure 4(B) is a cross-sectional view of the portion of the back surface 40 where the notch 51 is absent. In this state, the adhesive 55 of the folded flap 21 is not adhered to the inner surface of the front surface 30, but rather to the outer surface of the back surface 40, forming the sealing end of the envelope body 20.

[0031] Figure 5 shows the contents 70, such as delivery slips and quotations, to be inserted into the envelope body 20. In this case, the delivery slip is often made by folding an A5-sized sheet of paper in half horizontally, with the recipient's address usually written on the left side of the fold and the sender's address on the right side. In other words, as shown in Figure 5, the enclosed document 70 has a section for writing the document name 71, a section for writing the recipient's address 72, a section for writing the sender's information 73, and a section for writing the main text 74 printed on it. In this case, the postal code is also written in the recipient's address section 72 and the sender's information section 73 as needed. The main text section 74 is a communication document to be sent to the recipient regarding the enclosed item 70. Furthermore, if the enclosed item 70 is A5 size, the window envelope 10 can also be made smaller, for example, 113 x 175 mm, which saves resources and makes the product more environmentally friendly.

[0032] The vertical position of the address writing section 72 of the enclosed item 70 is adjusted in length so that when the enclosed item 70 is folded in half lengthwise and inserted into the envelope body 20, it aligns perfectly with the vertical position of the address display window 31 of the envelope body 20. Therefore, when the enclosed item 70, folded in half lengthwise, is inserted into the envelope body 20, which is already completed by gluing the top edge, the address writing section 72 is positioned at the location of the address display window 31. Consequently, the recipient can visually confirm through the address display window 31 that the address written in the address writing section 72 is their own. Furthermore, the vertical position of the sender's information section 73 of the enclosed item 70 is adjusted in length so that when the enclosed item 70 is folded in half and inserted into the envelope body 20, it aligns perfectly with the vertical position of the sender's information window 41 of the envelope body 20. Therefore, when the enclosed item 70, folded in half, is inserted into the envelope body 20, which is already glued at the top, the sender's information section 73 is positioned at the location of the sender's information window 41. Consequently, when the recipient turns the windowed envelope 10 over, they can see the sender's information written in the sender's information section 73 through the sender's information window 41.

[0033] Here, we will explain the function of the stopper 50, which ensures that the vertical position of the address display window 31 and the vertical position of the address writing area 72 align when inserting the contents 70 into the completed envelope body 20.

[0034] In Figure 3, when the one-sided sealing flap 21, which is located at the top of the front surface 30 of the envelope body 20, is folded back towards the back surface 40, the flap 21 is glued to the outer surface of the back surface 40. In this case, since a notch 51 and a projection 52 are formed on the upper part of the back surface 40, the upper part of the back surface 40 and the folded-over piece 21 are glued together in the portion where the projection 52 of the back surface 40 is interposed, while in the portion with the notch 51, the folded-over piece 21 is directly glued to the inner surface of the front surface 30.

[0035] In this state, when the enclosed item 70, which has been folded in half from the center, is inserted from below into the envelope body 20 shown in Figure 3, the tip of the enclosed item 70 will hit the lower end of the notch 51, that is, the lower end of the part where the inner surface of the front surface 30 and the inner surface of the folded flap 21 are glued together with adhesive 55, or in other words, the inner end position 50A of the stopper 50, and will be prevented from entering above the enclosed item 70. In other words, the lower end of the notch 51 prevents the entry of the sealed object 70, thus providing a stopper function that prevents the entry of the sealed object 70. As mentioned above, when inserting the enclosed item 70 into the envelope body 20, if the recipient's address and name written in the address writing section 72 of the enclosed item 70 are visually confirmed, and the folded flap 23 on the open end is used as a guide to insert the enclosed item 70 until it contacts the stopper 50, not only is insertion easy, but errors in inserting the enclosed item 70 can be reliably prevented.

[0036] Figure 6 shows a front view of the front surface 30 of the windowed envelope 10 when an item 70 is inserted into it. According to Figure 6, when an item 70 is inserted into the windowed envelope 10, the address writing area 72 of the item 70 can be properly viewed on the front surface 30 through the address display window 31. Furthermore, if the length from the lower end of the notch 51, i.e., the inner end position 50A of the stopper 50, to the lower edge of the address display window 31 is made approximately the same as the length from the upper edge of the enclosed item 70 to the lower edge of the address writing area 72, then when the enclosed item 70 is inserted into the windowed envelope 10, the address writing area 72 will automatically be visible through the address display window 31 without shifting.

[0037] Figure 7 shows a front view of the back side 40 of the windowed envelope 10 when an item 70 is inserted into it. According to Figure 7, on the back side 40, the sender's information section 73 can be properly viewed through the sender's information window 41. Furthermore, if the length from the lower end of the notch 51, i.e., the inner end position 50A of the stopper 50, to the lower edge of the sender's information window 41 is made approximately the same as the length from the upper edge of the enclosed item 70 to the lower edge of the sender's information section 73, then when the enclosed item 70 is inserted into the windowed envelope 10, the sender's information section 73 will automatically be visible through the sender's information window 41 without shifting.

[0038] In this way, after inserting the contents 70 into the windowed envelope 10, the release paper of the sealing tape 23A is peeled off from the folded flap 23 on the open end, and as shown in Figure 3, the fold line 27 is valley-folded and folded back to the front side, thereby gluing the folded flap 23 to the outer surface of the front 30 and sealing the windowed envelope 10. The sealed window envelope 10 will be mailed to the address displayed in the address window 31 after being dropped into a postbox.

[0039] When a windowed envelope 10 is mailed to an addressee, the recipient can see the address section 72 through the address display window 31, and the sender's information section 73 through the sender's information display window 41. After this, the recipient will tear open the upper end of the windowed envelope 10 by tearing it along the perforations 81 and 82 provided at the top of the windowed envelope 10. In this case, the perforations 81 and 82 are located either at the bottom of the notch 51 on the back surface 40, that is, exactly at the inner end position 50A of the stopper 50, or slightly inside the envelope body 20, that is, inside the windowed envelope 10, while the upper end of the enclosed item 70 is restricted from being inserted by the inner end position 50A of the stopper 50. Therefore, even if the upper end of the windowed envelope 10 is torn from the perforations 81 and 82, the upper end of the enclosed item 70 will not be torn.

[0040] According to the embodiment described above, the following effects are obtained. In this embodiment, the windowed envelope 10 has a translucent sender information window 41 on the back surface 40 in addition to the address window 31 on the front surface 30 of the envelope body 20, so that the sender information section 73 written on the enclosed item 70 can be seen through the sender information window 41. Therefore, if the sender's information is printed on the enclosed items 70, such as delivery slips or quotations, to be placed inside the envelope body 20, the sender's address, name, etc. can be displayed on the back of the envelope body 20 40 without having to print or handwrite it on the back of the envelope body 20. This eliminates the conventional complexity, namely the need to print or handwrite the sender's address, name, etc., on the outside of the window envelope 10. Furthermore, there is no need to display the sender's address, name, etc., on both the enclosed item 70 and the envelope itself 20; it only needs to be printed on the enclosed item 70, thus reducing printing costs.

[0041] Furthermore, by turning the windowed envelope 10 over and looking at the sender's information window 41 on the back 40, the sender's information section 73 can be seen, so the recipient of the windowed envelope 10 can confirm the sender without opening the envelope.

[0042] Since the windowed envelope 10 of this embodiment is provided with a stopper 50, when inserting an item 70 into the windowed envelope 10, the insertion position of the item 70 can be uniquely set simply by touching the tip of the item 70 to the stopper 50, and the address, name, etc. of the recipient and the sender written on the item 70 can be reliably displayed in the address display window 31 and the sender display window 41.

[0043] In this embodiment, the stopper 50 in the windowed envelope 10 can be easily formed by providing a notch 51 in a part of the back surface 40, which has the effect of allowing the stopper 50 to be manufactured at low cost.

[0044] The windowed envelope 10 of this embodiment is provided with perforations 81 and 82, which makes it easy to open the windowed envelope 10. Furthermore, since the perforations 81 and 82 are located at or near the inner end position 50A of the stopper 50, they do not tear any part of the enclosed contents 70. In addition, the opening portion of the windowed envelope 10 can be cut cleanly, resulting in a good appearance at the opening. Furthermore, since the cut-out pieces are somewhat thick, they can be recycled as waste paper instead of being discarded as garbage, making it an environmentally friendly product.

[0045] In this embodiment, the windowed envelope 10 is provided with writing areas 63 and 64 on the front surface 30 and back surface 40 as needed. This has the effect of making it easy to distinguish between the front and back of the windowed envelope 10, even if the windowed envelope 10 is not provided with a postage-related display frame 61 or a postal code entry frame 62. Furthermore, if the external design of the outer frame-shaped printed section 32 on the front surface 30 and the outer frame-shaped printed section 42 on the back surface 40 of the windowed envelope 10 in this embodiment is changed, it has the effect that the front and back of the windowed envelope 10 can be easily distinguished even if the front surface 30 and back surface 40 of the windowed envelope 10 do not have text entry sections 63, 64, postage-related display frames 61, postal code entry frames 62, etc.

[0046] Figure 8 shows another embodiment of the windowed envelope 10 according to the present invention. This embodiment shows the front surface 30 of the unfolded envelope body 20 in an envelope shape. In the other embodiments of Figure 8 described below, the same or equivalent components as in the above embodiments are denoted by the same or related reference numerals, and their descriptions are simplified or omitted. In this embodiment, the notches 51 and projections 52 that constitute the stopper 50 of the envelope body 20 in the above embodiment are set in the opposite orientation (up and down). Accordingly, the positions of the perforations 81 and 82 are also set in the opposite orientation.

[0047] In Figure 8, the windowed envelope 10 comprises an envelope body 20 formed in the shape of an envelope. An opening flap 123 is integrally provided at the top of the front surface 30 of the envelope body 20, and below (inside) the fold line 127 of this flap 123, a postage-related display frame 61 and a postal code entry frame 62 are provided. Below (inside) the postal code entry frame 62, there is an address display window 31, and around the periphery of this address display window 31, there is an outer frame-shaped printing section 32. Furthermore, a text entry area 63 is provided in the lower right corner of the front surface 30.

[0048] A stopper 150 is provided inside the envelope body 20 via perforations 181 at the bottom of the front surface 30 of the envelope body 20. The stopper 150 is composed of a sealing-side folded-back piece 121 that is folded back and glued to the back side of the paper in the figure, a notch 151 provided at the bottom of the back surface 40 of the envelope body 20 and formed between three protruding pieces 152, and an adhesive (not shown) that adheres the inner surface of the folded-back piece 121 to the inner surface of the front surface 30 within the notch 151. On the left side of the envelope body 20, the fold-over flap 122 for the side sealing is glued to the outer surface of the back side (not shown).

[0049] Other embodiments configured as described above can also achieve the same effects as those of the embodiments described above. Furthermore, in this other embodiment, a perforation 181 is provided on the side opposite to the upper end where the postage-related display frame 61 is located, so that when opening the window envelope 10, the stamp is not torn, and the effect of eliminating the resistance of tearing the stamp when opening the envelope is added.

[0050] In addition, in the embodiment shown in Figure 8, the fold-over flap 123 on the opening side, which is provided on the upper part of the front surface 30, can also be provided on the back surface 40, as in the embodiment shown in Figure 1 and the like. If it is provided on the back surface 40, it can guide the insertion of the enclosed item 70 into the windowed envelope 10, similar to the embodiment described above. In this case, if the fare-related display frame 61, etc., is provided on the front surface 30, the fare-related display frame 61, etc., will be hidden by the folded-over piece 123. Therefore, the fare-related display frame 61, etc., is provided on the back side of the folded-over piece 123.

[0051] Furthermore, in the windowed envelope 10 shown in Figure 1, etc., a camouflage pattern 91 may be provided on the inner surface of the envelope body 20, as shown in Figure 9, excluding the portions of the address window 31, the sender's address window 41, and the upper and lower folded flaps 21 and 23. The camouflage pattern 91 makes it difficult to read the contents of the enclosed item 70 from the outside of the windowed envelope 10. In Figure 9, the area forming the camouflage pattern 91 is the area 92 enclosed by the dashed-dot line. However, in Figure 9, the camouflage pattern 91 is not shown in its entirety within this area 92, but only in a portion. Furthermore, the dashed-dot line where the outline or window frame of the envelope body 20 overlaps with area 92 is drawn slightly away from the outline or window frame for easier identification.

[0052] Although embodiments of the present invention have been described in detail above with reference to the drawings, the specific configuration of the present invention is not limited to these embodiments, and any design changes, etc., that do not depart from the spirit of the present invention are also included in the present invention.

[0053] For example, although the three embodiments described above described a vertically oriented long envelope, the envelope may take on other forms, such as a horizontal Western-style envelope, a square envelope, or other types of envelopes. In the case of a horizontal Western-style envelope, the flap on the opening side can be provided on the longitudinal side, and the flap on the opening side may be provided on either the front or back side. Furthermore, various modifications of the stopper 50 are conceivable. For example, at the position where the folded-back pieces 21 and 121 on one end sealing side are folded back and glued, some intervening material may be sandwiched between the inner surface of the front surface 30 and the inner surface of the back surface 40 before gluing. However, as in the above embodiment, providing the stoppers 50 and 150 with notches 51 and 151 has the advantage of simplifying the structure.

[0054] In the embodiment shown in Figure 2, areas 21A and 22A for applying adhesive 55 are provided on the inner surfaces of the folded-back piece 21 on one end sealing side and the folded-back piece 22 on the side sealing side. However, this can be modified as appropriate, such as by providing areas for applying adhesive 55 on the outer surfaces of each folded-back piece 21 and 22, or by reversing the adhesive surfaces of the front surface 30 and the back surface 40.

[0055] Furthermore, in the windowed envelope 10, it is not necessary to provide the postage information display area 61 and the postal code entry area 62. Also, it is not necessary to provide the writing area 63 where the words "front side" are written and the writing area 64 where the words "back side" are written. Furthermore, while it is not necessary to provide perforations 81 and 82, providing them has the advantage of making it easier to open the window envelope 10, ensuring a stable cut edge, and preventing damage to the enclosed contents 70. [Explanation of symbols]

[0056] 10… Windowed envelope 20…Envelope body 21,121...Folded-back piece on one end of sealing 22,122…Folded-back piece on the lateral sealing side 23, 123... Folded-back piece on the open end of the other end 24…Fold line 25…Fold line 26…Fold line 27,127…fold lines 30... Front side 31... Window for displaying the recipient's name 32…Outer frame-shaped printing section 40…Back side 41...Window for displaying the sender's information 42…Outer frame-shaped printing section 50,150... Stopper 50A,150A…Inner end position 51,151… trigger 52,152...projection piece 55…Adhesive 61...Price-related display area 62...Postal code entry box 63...Writing area 64…Writing area 70…Contents 71... Section for entering document name 72... Addressing section 73... Sender's Information Section 74…Text entry section 81,181... perforations 82... Perforation 91...Camouflage pattern 92... Range

Claims

1. An envelope with a window, characterized by comprising: an envelope body formed in a rectangular shape, with three sides of the rectangle closed and one side open for inserting an item; a translucent address window provided at a predetermined position on the front surface of the envelope body, which is large enough to display the recipient's address; and a translucent sender window provided at a predetermined position on the back surface of the envelope body, which is large enough to display the sender's address.

2. A windowed envelope according to claim 1, wherein the open-side fold-over piece provided on the open side of the envelope body is provided on the back side of the envelope body, and when inserting an item, the item can be inserted into the windowed envelope using the fold-over piece as a guide while visually checking the address of the item.

3. A windowed envelope according to claim 1 or claim 2, characterized in that a stopper is provided which, when inserting the contents from the open side of the windowed envelope, the insertion-side tip of the contents abuts against the stopper to position the contents in the windowed envelope.

4. A windowed envelope according to claim 3, characterized in that a perforation is provided at the inner end position of the stopper on the windowed envelope, or slightly inside the inner end position of the windowed envelope, which allows the side of the windowed envelope on which the stopper is provided to be cut.

5. A windowed envelope according to claim 1 or claim 2, characterized in that at least one of the following is provided on the front surface of the windowed envelope: a postage-related display frame provided above the address display window, a postal code entry frame, the address and front surface provided on the front surface of the windowed envelope to indicate that it is the front surface of the envelope body, the sender and other characters provided on the side sealing flap on the front surface of the windowed envelope, and the back surface provided on the back surface of the windowed envelope to indicate that it is the back surface of the envelope body.

6. A windowed envelope according to claim 4, characterized in that at least one of the following is provided on the front surface of the windowed envelope: a postage-related display frame provided above the address display window, a postal code entry frame, the address and front surface provided on the front surface of the windowed envelope to indicate that it is the front surface of the envelope body, the sender and other characters provided on the side sealing flap on the front surface of the windowed envelope, and the back surface provided on the back surface of the windowed envelope to indicate that it is the back surface of the envelope body.

7. A windowed envelope according to claim 1 or claim 2, characterized in that the external design, such as the shape and color, of the external frame-shaped printed portion provided on the front surface of the envelope body and the external frame-shaped printed portion provided on the back surface are different.

8. A windowed envelope according to claim 3, characterized in that the external design, such as the shape and color, of the external frame-shaped printed portion provided on the front surface of the envelope body and the external frame-shaped printed portion provided on the back surface are different.

9. A windowed envelope according to claim 4, wherein the folded flap on the open end of the envelope body is provided on the back side of the envelope body, and when inserting an item, the recipient can see the address of the item and use the folded flap as a guide to insert the item into the windowed envelope. A windowed envelope characterized in that the external design, such as the shape and color, of the external frame-shaped printed portion provided on the front side of the envelope body and the external frame-shaped printed portion provided on the back side are different.

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