JPS63232147A - Letter paper - Google Patents

Abstract

This invention relates to the formation of a number of envelopes (20) from a continuous length of paper. Each envelope, except the end envelope, partly overlaps and is attached to an adjacent envelope, substantially the whole of the face of each envelope not being overlapped by an adjacent envelope.

Description

[Detailed description of the invention] The present invention relates to letter paper, and more particularly to envelopes.

In a particularly preferred embodiment, the present invention provides a letter paper of a length of paper or other material having a structure folded into a plurality of envelopes, each envelope comprising a length of paper or other material. Envelopes that partially overlap and are connected to other envelopes that are adjacent to each other except for one end in the longitudinal direction, and each envelope partially overlaps and is adjacent to the other envelopes that are connected to each other except for the other end in the longitudinal direction. It is made up of letter paper that is strung together.

In another embodiment of the invention, there is provided a letter paper of a length of paper or other material having a structure folded into a number of envelopes, each envelope comprising a letter paper or other material. They partially overlap except for one end in the longitudinal direction of the paper, and
The envelopes are connected to a first consecutively adjacent envelope in the longitudinal direction, and the envelope is partially overlapped and connected to a second consecutively adjacent envelope in the longitudinal direction. Each envelope has a front side part and a back pJ part, and at least the entire front side part of each envelope does not overlap with other adjacent envelopes.

Preferably, the letter paper overlaps each of the envelopes at least on the inner side of one end thereof, but the paper or other material suitable for forming the envelope does not have a thickness of three or more layers. Not yet.

Preferably, the letter paper is such that the paper or other material suitable for forming the envelope is not more than four layers thick, despite the overlapping portions of adjacent side pieces of each envelope. Not yet.

Preferably, the letter paper generally inward of the side edges of each envelope has no more than three layers along its length of paper or other material suitable for forming the envelope; The dimension is 50 mm or less, more preferably the dimension is 4
The dimension is 0 mm or less, more preferably 30 mm or less.

Preferably, the letter paper in adjacent side pieces of each envelope has a thickness of not more than four layers in the longitudinal direction of the paper or other material suitable for forming the envelope; This region has a size of 30 mm or less, preferably a size of 10 mm or less, and more preferably a size of 5 cities or less.

Preferably, the letter paper in the inner portion of each envelope side piece has a substantially constant thickness in the longitudinal direction of the three layers of paper or other material suitable for forming the envelope.

Further, the portion of letter paper on the inside side of each of said envelopes is made of three or more sheets of paper or other material suitable for forming the envelope.
]- is constant over at least 70% of the length.

Preferably, the letter paper in adjacent side pieces of each envelope has a constant thickness of four longitudinal layers of paper or other material suitable for forming the envelope.

The letter paper in adjacent side pieces of each envelope is such that four layers of paper or other material suitable for forming the envelope are constant over at least 90% of its length. There is.

Preferably, a first glue section is provided continuously in the longitudinal direction on the back side of each envelope, and the first glue section is folded over the back side of the envelope when sealing the envelope.

Preferably, a second glue section is provided continuously in the longitudinal direction on the back side of each envelope, and the first glue section is folded into the second glue section when sealing the envelope. Therefore, adjacent envelopes are connected to each other in a continuous state in the longitudinal direction via the first glue margin of one envelope, and this first glue margin is connected to the first glue margin of the adjacent envelopes. 2 Adjacent to the glue margin.

Preferably, one or both of the first glue margin and the second glue margin is provided with an adhesive.

As this adhesive, an adhesive that adheres when wet is used, but an anger pressure type is preferably used.

The second glue margin of one envelope is preferably connected to the first glue margin of an adjacent envelope, so that the front side of said one envelope overlaps the front side of another adjacent envelope. It turns out. The aforementioned connection is preferably made via a perforation along which the respective envelopes are separated.

Preferably, the dimensions of the first glue margin and the second glue margin are such that at least substantially the entire front side of each envelope is
Adjacent envelopes have dimensions that do not overlap.

More preferably, the dimensions of the 11111th margin and the dimensions of the second adhesive margin are such that the entire front side of each envelope does not overlap with an adjacent envelope.

Preferably, a dimension twice the sum of the dimensions of the first glue margin and the second glue margin is not shorter than the dimension of the front side of the envelope.

Preferably, a dimension that is twice the sum of the dimensions of the first adhesive margin and the second adhesive margin is 1 times the dimension of the front side of the envelope.
It is set so that it does not become larger than the dimension obtained by adding a value of 0 mm or less.

Preferably, the dimensions of the first glue margin and the second glue margin are such that when the first glue margin is folded to seal an envelope, the first glue margin is larger than the second glue margin. The dimensions are such that it covers the entire area.

Preferably, the second glue margin is folded so as to overlap the back side of the envelope.

Preferably, the second glue margin is not bent from the state where it is continuous with the back side, and when sealing the envelope, the first glue margin is folded over the second glue margin. It will be bent towards.

Preferably, the second glue margin is joined to the back side of the envelope so as to overlap the back side of the envelope when the envelope is formed.

In one example, the second adhesive section is releasably bonded to the front side of the envelope, and the second adhesive section is attached to the back side of the envelope with adhesive so that it can be peeled off. It has become.

In another example, the second glue margin is joined to the back side of the envelope, and when the second glue margin overlaps the back side of the envelope formed by the adhesive, it is suitable for forming an envelope. such that it cannot be removed without substantially tearing the paper or other material.

Preferably, the dimensions of the first gA margin and the dimensions of the second adhesive margin are such that when the first adhesive margin is folded to seal an envelope, the first adhesive margin is equal to the second adhesive margin. It covers the entire area.

Preferably, the first adhesive portion is connected to the front side through a sharp or loose section fold line, and at least an adjacent side piece of the back side extends from the fold line. There is.

Preferably, the first adhesive portion is connected to the front side through a sharp or loose section fold line, and at least an adjacent side piece of the back side extends from the front fold line. The second adhesive portion is bent along another fold line so as to overlap the back side, and this fold line is closer to the bottom of the envelope than the back side adjacent to the side piece, and The portion is close to the folding line between the first adhesive portion and the front side portion.

In other examples, the second glue margin or the protrusion thereof may include side pieces of the respective envelopes when the second glue margin is unfolded as described above. When folded, it overlaps the back side. Such bending of the side pieces is facilitated by a dividing bending line provided at a predetermined distance from the side end in the second glue margin or the protrusion.

In order to maintain the side edges in the folded condition described above, adhesive is provided on these side pieces or back sides.

A hole for a sprocket used for feeding the printing machine is provided in the side piece.

Preferably, a portion of the perforation or section fold line that crosses the side piece does not pass through a portion of the sprocket hole or approximately through the center of the sprocket hole.

The front and back sides of the envelope are joined together along the side pieces, or not completely joined together.

In one example, the side pieces are attached to the envelope via compartment perforations, and the side edges are band-shaped with respect to the envelope.

Preferably, the side pieces are continuous over the entire length of the letter paper.

Preferably, said side pieces have overlapping household length portions.

Preferably, the side pieces are provided with adhesive areas to bring the molded parts into close contact with each other.

Preferably, the adhesive area is positioned so as to adhere to the overlapping bottom portion of the envelope.

In one example, the front and back sides of each envelope are
The side pieces are joined to each other at inner surface portions.

Preferably, the front and back sides of each envelope are not joined to each other in the region of said side pieces, such that air trapped within each envelope as it passes through the machine escapes to the outside. There is.

Preferably, the envelope has side pieces extending from either the front side or the back side, and the side pieces are joined to either the front side or the back side so that the envelope Both ends are closed.

More preferably, the envelope has side pieces extending from both ends of the back side, the side pieces being folded inwardly;
Joined to the inside of the front side to close the envelope.

Preferably, said side pieces extending from both ends of the back side and folded inwardly are provided with sprocket holes to facilitate longitudinal movement prior to folding them.

In one example, the front side has a side piece projecting laterally to the outside of the envelope and having a sprocket hole in the feed lick of a sprocket-based printer. There is.

Two or more pieces of letter paper are arranged side by side to produce a composite article having two or more envelopes that intersect in the width direction.

The letter paper of the present invention may be formed from a single sheet or from a series of sheets.

In one example, the letter paper is fanfold.

Preferably, the envelope is provided with lines or compartment fold lines to facilitate fanfolding.

To facilitate fan-folding, compartment fold lines are provided only on the front side of each envelope and not on the back side of each envelope.

Preferably, the dividing line is provided on the front side between the first glue margin and the back side in order to facilitate the fan hold.

Preferably, the first adhesive portion is connected to the front side portion at a section fold line, and the letter paper is fan-held at this line.

Preferably, the second glue margin or its protrusion is connected to a side piece of each envelope, and when the second glue margin is not bent as described above, these side pieces are bent. This will overlap the back side.

Preferably, the dividing bending line is provided at a predetermined distance on the side piece in order to facilitate bending of the side piece at the second adhesive margin and the protrusion.

Preferably, one of the back side and the side pieces is provided with an adhesive, which is used to maintain the side pieces in a folded state.

Preferably, there are no portions of the letter paper where the paper or other material suitable for forming the envelope is more than three layers thick.

In one example, a second sprocket hole is provided in the side piece, located outside the first sprocket.

Preferably, the second sprocket hole has a predetermined spacing with respect to the first sprocket hole by an area having a partitioning perforation, and the second sprocket hole has a predetermined spacing from the first sprocket hole, and The envelope part is band-shaped.

Preferably, in those portions of letter paper where portions of one envelope overlap portions of other adjacent envelopes, the portions of the envelopes that overlap by the sprocket holes or the portions of the overlapped envelopes are folded over each other. It protrudes more laterally from the side of an envelope or folded envelope so that, in use, the sprocket feed mechanism engages a sprocket hole in the laterally protruding side, but it does not It does not engage the side pieces of overlapping envelopes.

Preferably, adjacent envelopes are joined together via compartment perforations, so that the letter paper forms a single envelope separated from other envelopes.

Preferably, the first glue margin is continuously connected to the back side of an adjacent envelope in the longitudinal direction.

Further, the first adhesive portion of the envelope is continuously connected to the back side of an adjacent envelope in the longitudinal direction via the disposable portion.

Further, a second glue margin is connected to the back side continuously in the longitudinal direction, and the first glue margin is folded into the second glue margin to seal the envelope, and the first glue margin is adjacent to the second glue margin. Envelopes are connected to other envelopes in a continuous manner in the longitudinal direction via the first glue margin, and the envelopes are connected to other envelopes in a state in which the first glue margin and the second glue margin of adjacent envelopes are continuous in the longitudinal direction. In this state, it is connected to the disposable part in the middle.

In such an example, the disposable part is divided by a section perforation that crosses the first glue margin and the second glue margin.

In one example, the letter paper has a backing sheet.

In one example, the letter paper has a decorative sheet.

The decorative sheet is provided with holes through which printing or other indicia can be added to the front side of the envelope.

In another example, the decorative sheet is provided with printing or other indicia, such that the printing or other indicia appears on the decorative sheet of the envelope.

The structure of an embodiment of the invention is shown in the drawings.

The following legends are used to facilitate understanding of the accompanying drawings, particularly FIGS. 1 and 2.

a) Dashed-two dotted line. This indicates a perforation.

b) Tankan line. This shows the fold lines of the letter paper.

C) Dot-dashed line. This indicates a polyline when used.

d) Long dashed line. This is shown on the letter paper, but the fold line of the letter paper is opened when used.

e) Sandfish. This represents Adhesive A.

f) Crosshatch. This represents adhesive B or adhesive C.

g) Diagonal dotted hatch. This shows Adhesive B.

The letter paper shown in FIGS. 3 and 4 consists of a number of envelopes 20 that are folded like a fan, and each envelope has a first glue margin 21 at the top of the envelope. The first glue margin 21 is connected to the second glue margin 22 at the bottom of each envelope via a perforation 23.

Each envelope is provided with sprocket holes 24 on each side to allow the printing machine's feed sprocket to pass through the letter paper.

The shape of each envelope 20 is more clearly understood from FIGS. 5, 1 and 2.

As shown in Figure 5, Figure 1 and Figure 2, each envelope 2
0 is formed by folding sheet material.

As shown in FIG. 1, this sheet material has a front side in which the front side 3 and back side 32 of each letter paper are shown facing up, and as shown in FIG. Paper front side 3]
and a back surface where the back side of the back side portion 32 is shown.

The sheet has folding lines 33 for the first glue margin 21 and lines 34 and 35 along which the sheet will actually be folded when forming each single envelope. This line 35 is not bent when the second adhesive portion 22 is assembled to the first adhesive portion 21 and sealed, and the sheet is provided with perforations. 23 are provided.

Furthermore, the sheet material has perforation lines 37.3 on both sides thereof.
It has side pieces 135 and 36 separated by 8. It is also possible to use the respective lines 37 and 38 as folding lines for division instead of perforations.

The side piece portions 36 on both sides and the second glue margin portion 22 are arranged along the folding line 4 for division]. It has 42.

Adhesive A is provided in region A (portion defined by line 35, side edge 44, and line 4) in the side bending portions 36 on both sides.

Area Bl (second glue margin 22), area B2 (first glue margin 2)
1), adhesive B is applied to region B3 (portion adjacent to side edge 45) and region B4 (portion adjacent to side piece portion 135).

Another example is one in which adhesive C is applied to one of areas B1 and 82, and no adhesive is applied to areas other than these areas B1 and B2.

Adhesive A is for bonding the envelope portions together after they have been folded to form the letter paper shown in FIG. By being bent at the portion shown in FIG.

Adhesives B and C are for adhering the parts of the envelope after printing and separation from the letter paper when they are sealed and sent to the recipient.

Adhesives A, B, and C may be of the same type or of the same type if desired, but different types of adhesives are selected.

The sheets of material shown in FIGS. 1 and 2 are folded and combined to form the letter paper of FIG. 3 described above.

In order to obtain letter paper as shown in FIG. 3, each of which is folded like a fan, the nth envelope is provided with a fold line 61 for division, and this "n" ′ is a pair of envelopes that are folded like a fan. The practical value of n is 5.

The letter paper in the state shown in Fig. 3 can be passed through a printing machine for printing an address, and after printing, it is separated into individual envelopes by tearing at the line 23, and as a result, the letter paper is separated into individual envelopes. Individual envelopes are formed as shown in FIG.

After separating into individual envelopes, the second glue margin 22 is
If not folded as shown in Figure 8, but as shown, the side pieces 135 on both sides would lie on the side edges 45, and although they are not joined, the adhesive areas B3 and B4 would be contact and be combined. Thereafter, the first glue margin 21 is folded over the second glue margin 22, and the adhesive areas B1° and B2 are joined together.

Another example using the letter paper shown in FIG.
At points 7 and 38, the two side pieces 135 and 36 may be removed from the letter paper. However, in this case the adhesive areas B3 and B4 should be provided at the positions shown in FIG.

The adhesive in areas B3 and 84 shown in FIGS. 1, 2, and 10 is used to release air that would otherwise be trapped when the letter paper passes through the pinch rollers of a printing machine or the like. It is not provided to extend to the line 34.

In the modification shown in FIG. 9, a sprocket hole is additionally formed in the side piece 235 separated at the perforation 237. Adding such sprocket holes is also useful when manufacturing actual sheet material, as shown in FIG.

The letter paper shown in Figures 13 to 17 and the sheet paper shown in Figures 11 and 12 are similar to those shown in Figures 1 to 4, and have common parts. are given the same reference numerals.

However, the following variations should be noted.

Adhesive areas B1, B3, and B4 are omitted.

An adhesive area B5 is provided, which may be of the rewettable type or of the heat-sensitive type. The purpose of this is to securely fasten the second glue section 22 against the back side 32 to provide additional force against the envelope, particularly in the area of the fold line 35, after the envelope is completed, and to secure the letter inside the envelope. It can be possible to be used by a machine for arranging and other things. In this embodiment, the adhesive area B2 is of a type that can be bonded by moistening (FIGS. 14 and 16) or of a heat-sensitive type (FIGS. 13 and 17). , as shown in FIG.
12 to the surface of the second adhesive portion 22 shown in FIG. 12, the area A2 where this contacts the six side piece area 36 used for sealing the envelope is omitted. .

The back side 32 is provided with a side piece 235 which is provided with a 3 to adhesive area. In forming the envelope, the side pieces 235 are folded along fold lines 145, as shown in FIG. As shown in the side piece 23
5 is fixed to the surface of the front part 3, as shown in FIG. This state is shown in FIG. The envelope in this state (see FIG. 15) is separated from the side piece 135 and the sprocket hole 24, and if the line 37, which is the line of the side piece 135, is a perforation, this side piece By tearing away the 135, it becomes like a normal envelope.

Adhesive is used in the area A4 of the side piece 135, and when in use, the 11th area of other adjacent envelopes
Adjacent side piece 13 by joining the upper end (in FIG. 11) of the portion of side piece 135 shown in the figure.
5 will be fixed securely. This condition is illustrated in FIGS. 22 and 23 for the letter paper shown in FIGS. 18 and 19.

The lengths of the first glue margin section 21, second glue margin section 22, front surface section 3], and back side section 32 are changed to facilitate drilling, as shown in FIG. 11. These lengths also apply to the letter paper shown in FIGS. 18 and 19.

The envelope shown in Figure 21 is similar to that shown in Figure 15, and is made from the sheets shown in Figures 18 and 19, as well as the sheets shown in Figures 11 and 12. ing.

In FIGS. 18 and 19, adhesive areas are not shown and some lines are not shown for convenience of description.

Other important variations should be noted compared to FIGS. 18, 19 and 15.

The side pieces 235 in FIGS. 11 and 12 are similar to those in FIGS. 18 and 1.
In FIG. 9, it is indicated by the reference numeral 335, which is of a slightly different type.

The back side 32 of the envelope has an extension 132 extending beyond the fold line 35 and reaching the protrusion of the line 23. This extension 132 will provide additional force on the envelope.

As shown in FIG. 11 and FIG. It is different from Sato. These lengths are varied so that line 33 is shown in FIGS.
This is used as the folding line shown in FIG. 3, and the envelopes before folding only overlap part of the first glue margin 21 of adjacent envelopes, but do not overlap the front side portions of adjacent envelopes.

The claims reflect what is disclosed in this specification.

[Brief explanation of drawings]

FIG. 1 is a plan view showing one side of a sheet of paper used to form the letter paper of the present invention, which letter paper is shown in FIG. FIG. 2 is a plan view showing the opposite side of the sheet shown in FIG. 1, and FIG. 3 is a plan view of the letter paper formed by folding the sheet shown in FIGS. FIG. 4 is a cross-sectional view taken along line 4-4 in FIG. 3, and FIG. 5 is a perspective view of a single envelope separated from the letter paper shown in FIG. FIG. 6 is a perspective view of an envelope similar to the one shown in FIG. 5 with a part thereof folded;
The figure is a perspective view showing an envelope similar to the one shown in Fig. 5, partially folded, and Fig. 8 is a perspective view showing an envelope similar to the envelope shown in Fig. 5, completely folded. FIG. 9 is a plan view showing a modified example of the seat shown in FIG. 1, and FIG. 10 shows a modified example of the seat shown in FIG. 2. FIG. 11 is a plan view showing the surface of a sheet of paper used to form the letter paper of the present invention, and envelopes made from this are shown in FIGS. 13 to 17. There is. Figure 12 is the first
Fig. 13 is a plan view showing the opposite side of Fig. 1;
FIG. 14 is a schematic perspective view showing the process of forming an envelope using the sheets shown in FIGS. 1 and 12, and FIG. 14 is a schematic perspective view showing the process of forming an envelope using the sheets shown in FIGS. FIG. 15 is a schematic perspective view showing the middle part, and FIG.
16 is a perspective view showing an envelope formed by folding the sheet shown in FIG.
17 is a partially omitted perspective view showing an envelope formed by folding the sheet shown in FIG.
FIG. 13 is a partially omitted perspective view showing an envelope formed by folding the sheets shown in FIGS. 1 and 12;
FIG. 8 is a plan view showing the surface of a sheet of paper used to form the letter paper of the present invention, and envelopes made therefrom are shown in FIGS. 20 to 23. FIG. 19 is a plan view showing the opposite side of FIG. 18, and FIG. 20 is a schematic perspective view showing the process of forming an envelope using the sheets shown in FIGS. 18 and 19. , Figure 21 is the first
A perspective view showing an envelope made by folding the sheets shown in Figures 8 and 19, and Figure 22 is one of the letter papers shown in Figures 18 and 19 in the state of fanfold paper. FIG. 23 is a perspective view showing the other side of the tumor monitor shown in FIGS. 18 and 19 in a fanfold state; FIG. 20... Envelope, 21... First glue margin, 22... Second glue margin, 23... Perforation, 3]... Front side part, 3
2 is the back side. Patent applicant Lawrence John Bell Agent Patent attorney 8 1) Mikio (one idiot) -de r-
SL/''1 ~ 0) ■ '' Exposure 4 to J (-)-riFIG 13 \J Cfu engineering Q Tsuba) ■ C 鵠■ One! 11 He=

Claims (1)

[Scope of Claims] [1] Letter paper made of paper or other material suitable for envelopes that is folded to form a plurality of envelopes for a certain length, excluding one longitudinal end of the letter paper. In this way, each envelope is connected to a fourth envelope adjacent to each other in a series and partially overlaps, and furthermore, each envelope is connected to a fourth envelope that is adjacent to each other in a series, and also overlaps with a fourth envelope in a series, except for the other end in the longitudinal direction of the letter paper. is connected to and partially overlaps another second envelope adjacent to the second envelope, each said envelope has a front side and a back side, and each said front side is at least substantially entirely adjacent to said other second envelope. Letter paper having a shape that prevents envelopes from overlapping. [2] The letter paper according to claim 1, wherein the letter paper has three layers of paper or other material suitable for forming the envelope at least in the side pieces of the envelope even in the overlapping state. Letter paper with a thickness that cannot be exceeded. [3] The letter paper according to claim 1, wherein even when the letter paper is overlapped, adjacent side pieces of the envelope are covered with paper or other material suitable for forming the envelope. Letter paper with a thickness of no more than 4 layers. [4] The letter paper according to claim 1, wherein the side pieces of the envelope include three layers of paper or other material suitable for forming an envelope in a region along the longitudinal direction of the letter paper. letter paper of a thickness not exceeding 50 mm; [5] The letter paper according to claim 1, wherein the side pieces of the envelope include three layers of paper or other material suitable for forming an envelope in a region along the longitudinal direction of the letter paper. letter paper of a thickness not exceeding 30 mm; [6] The letter paper according to claim 1, wherein each envelope has a first paper on the front side that is connected in the longitudinal direction and is folded to the back side of the envelope when sealing the envelope.
Letter paper with glue sections attached. [7] The letter paper according to claim 6, wherein the first glue margin is folded on the back side of each envelope when the envelopes are sealed, in a state where they are connected in the longitudinal direction. Envelopes that are adjacent to each other are connected to each other in a longitudinal direction by the first glue margin of one envelope, and the first glue margin The margin is the letter paper that is connected to the second adhesive margin of other adjacent envelopes. [8] The letter paper according to claim 7, wherein the dimensions of the first glue margin and the dimensions of the second glue margin are such that at least substantially the entire front side of each envelope is adjacent to each other. Letter paper whose dimensions are not covered by some envelopes. [9] The letter paper according to claim 7, wherein the sum of the dimensions of the first glue margin and the second glue margin is twice the size of the front side of the envelope. Letter paper with dimensions that do not shrink. [10] The letter paper according to claim 7, wherein each of the second glue margins is folded toward the back side of the envelope. [11] The letter paper according to claim 10, wherein the second adhesive portion is oriented toward the back side of the envelope and is joined to the back side of the envelope. Letter paper. [12] The letter paper according to claim 11, wherein the second adhesive portion is directed toward the back side of the envelope when the adhesive is peeled off. A letter paper detachably attached to the back side of the letter paper. [13] The letter paper according to claim 11, wherein the second adhesive portion is arranged so that the second adhesive portion can be removed without substantially tearing away paper or other material suitable for forming an envelope. The letter paper is bonded to the back side of the envelope with an adhesive that does not peel off so as to overlap the back side of the envelope. [14] The letter paper according to claim 4, wherein the first adhesive portion is connected to the front side portion via a sharp or loose fold line for division, Letter paper in which the back side extends approximately to the fold line. [15] The letter paper according to claim 7, wherein the first adhesive portion is connected to the front side portion via a dividing line, and the back side portion is connected to the line portion. substantially elongated, the second glue margin being folded toward the back side along a fold line, the fold line being relatively more adjacent to the bottom of the envelope than an area of the back side adjacent to the side piece. and the side piece is closest to the line between the first glue margin and the second glue margin. [16] The letter paper according to claim 1, wherein the letter paper has a side piece in which a sprocket hole for use in a print feeder having a sprocket is formed, and the side piece has a side piece formed in the letter paper. Letter paper that is continuous throughout its length. [17] The letter paper according to claim 1, wherein the envelope has a side piece extending from a side edge of the back side, and this side piece is folded inward so that the envelope is sealed. Letter paper that came to be used as a letter paper. [18] The letter paper according to claim 17, wherein a sprocket hole is formed in the side piece that extends from the side edge of the back side and is bent inward, and the side piece extends from the side edge of the back side and is folded inward. is a letter paper designed to facilitate longitudinal movement. [19] The letter paper according to claim 6, which has a fanfold type shape. [20] The letter paper according to claim 19, wherein a first adhesive portion is connected to the front side portion of each envelope at a section folding line, and the letter paper Letter paper with fanfold parts. [21] The letter paper according to claim 7, wherein a side piece of each envelope is connected to the second glue margin or this protrusion, and the second glue margin is folded. If it is not possible, the letter paper can be folded to overlap the back side when the side pieces are folded. [22] The letter paper according to claim 21, wherein folding lines for a plurality of divisions are provided at a predetermined distance from the side piece, and the folding line for a plurality of sections is provided at a predetermined distance from the side piece, and A letter paper in which the side pieces can be easily folded. [23] The letter paper according to claim 21, wherein an adhesive is provided on one of the back side portion and the side piece portion in order to maintain the folded state of the side piece portion. . [24] The letter paper according to claim 6, wherein a second glue margin is continuous in the longitudinal direction of the letter paper on the back side of the envelope, and when sealing the envelope, the first glue The margin is bent toward the second adhesive margin, and adjacent envelopes are connected to each other in the longitudinal direction of the letter paper at the first adhesive margin, so that the envelopes are continuous in the longitudinal direction. A letter paper in which a portion between the first glue margin and the second glue margin can be removed.