JP7540693B2 - Sandwich packaging bag assembly sheet - Google Patents

Description

This invention relates to an assembly sheet for sandwich packaging bags, which is needed with the development of machines that can automatically package large quantities of sandwiches.

Traditionally, sandwiches are made by placing a variety of ingredients between multiple right-angled triangular slices of bread, due to the necessities of the manufacturing process.
Therefore, when packaging a sandwich, a packaging case is first made out of resin film to fit the overall shape of the sandwich, the sandwich is inserted from the open rear side toward the inclined front surface, and the packaging is completed by closing the rear side.
Such packaging technology requires that the packaging material be a resin film and that the sandwich be displayed in a manner such that the triangular inclined side of the sandwich faces forward when displayed in stores at the time of sale, i.e., that the sandwich ingredients are exposed through the cut edges of the inclined side and can be visually confirmed.

Patent Document 1 describes a continuous bag made of resin film for automatically and continuously enclosing sandwiches. This continuous bag is made by overlapping two synthetic resin, roughly rectangular film sheets and welding the three peripheral sides of the continuous bag to form a bag with one side open into which a sandwich can be inserted. It describes how this continuous bag forms a storage space for inserting a sandwich by blowing air into one open side, and how the sandwich can be easily sealed by inserting it into the storage space from the open side.

Japanese Utility Model Application Publication No. 5-58647

However, because the sandwich packaging described in Patent Document 1 uses a resin film, there is a strong demand for using organic wrapping paper whenever possible in light of recent environmental conservation demands, and there is a demand from the industry for a change in materials. At the same time, there is a demand for technology that allows sandwich packaging to be performed automatically by machinery.
To achieve this, it is first necessary to provide an assembly type packaging bag that can be automatically packaged using a machine.
In order to implement the automatic sandwich packaging technology, a prerequisite is the emergence of a prefabricated sandwich packaging bag made of paper that is suitable for automatic packaging operations using a packaging machine.

The present invention aims to solve the problems of the prior art by providing an assembled sandwich packaging bag made of paper, and in particular to provide an assembled sheet structure for assembling into a packaging bag that can be used with such mechanical packaging devices.

The present invention provides an assembly sheet for a sandwich packaging bag, which is characterized in that it is composed of left and right triangular surfaces formed into a right triangle, a peripheral packaging band for sandwich packaging, the width of which is the thickness of the sandwich and the length of the rectangular shape is the length of the triangular periphery of the right-angled sandwich, the inclined surface edges of the left and right triangular surfaces are respectively connected to the left and right end edges of the middle part of the peripheral packaging band in a freely foldable manner, the peripheral packaging band has a back part that corresponds to the vertical back surface of the sandwich when packaged and has a separation breaking line for separating the left and right sides of the approximately center line of the back surface of the packaging band in the longitudinal direction, a transparent inclined surface part that corresponds to the inclined surface of the sandwich when packaged, a bottom part that corresponds to the bottom surface of the sandwich when packaged, and a tab part that can be folded in two and is interposed between the transparent inclined surface part and the back part.

In addition, in order to assemble the peripheral wrapping band and the left and right triangular bodies into a sandwich packaging bag, adhesive margins are extended to the right-angled sides of the left and right triangular bodies, the left and right sides and tip sides of the back part, and the left and right sides and tip sides of the bottom part.

The peripheral wrapping band is also characterized in that the base end width of the back portion, the bottom side width of the transparent inclined surface portion, and the base end width of the tip end of the bottom portion are successively narrower, so that the back portion is formed into an inverted trapezoid that is wider at the top when wrapped, the transparent inclined surface portion is formed into an inverted trapezoid that is wider at the top when wrapped, and the bottom portion is formed into an inverted trapezoid that is wider at the front when wrapped.

According to the invention of claim 1, the device is composed of left and right triangular surfaces formed into a right triangle, and a peripheral wrapping band for sandwich packaging, the width of which is the thickness of the sandwich and the length of the rectangular shape is the length of the triangular periphery of the right-angled triangle sandwich, and the inclined surface edges of the left and right triangular surfaces are connected to the left and right end edges of the middle part of the peripheral wrapping band so as to be freely folded. The peripheral wrapping band has a back part that corresponds to the vertical back surface of the sandwich when wrapped and has a tear line for longitudinally separating the left and right sides of the approximately center line of the back surface of the wrapping band, a transparent inclined surface part that corresponds to the inclined surface of the sandwich when wrapped, and a bottom surface that corresponds to the bottom surface of the sandwich when wrapped. The peripheral wrapping band and the left and right triangular bodies can be assembled together to form a right-angled triangle shape of the sandwich, and these components can be constructed from a single sheet, which simplifies the mechanical assembly process and provides the effect of realizing reliable mechanical assembly operation.

According to the invention of claim 2, in order to assemble and configure a sandwich packaging bag using the peripheral wrapping band and the left and right triangular bodies, the adhesive margins are extended to the right-angled sides of the left and right triangular bodies, the left and right sides and tip sides of the back part, and the left and right sides and tip sides of the bottom part. This has the effect that when assembling the peripheral wrapping band and the adhesive margins of the left and right triangular bodies, each component can be assembled into a sandwich triangle shape via the adhesive margins of each component, and moreover, by simply folding each component along the connecting boundary line, the external shape of the sandwich can be formed by bonding them using the adhesive margins extended from the folding lines.

According to the invention of claim 3, in the peripheral wrapping band, the base end width of the back portion, the bottom side width of the transparent inclined surface portion, and the base end width of the tip end of the bottom portion are configured to successively narrower in width, so that the back portion is formed into an inverted trapezoid that is wider at the top when wrapped, the transparent inclined surface portion is formed into an inverted trapezoid that is wider at the top when wrapped, and the bottom portion is formed into an inverted trapezoid that is wider at the front when wrapped.As a result, when the final sandwich-shaped packaging bag is formed by assembling the sandwich, the sandwich can be inserted into the bag space from the open back portion, resulting in the final sandwich product distribution form.
In the manufacturing process for such sandwich packaging, each component of the peripheral wrapping band is formed into an inverted trapezoidal shape, and the base end width of the back portion, the bottom side width of the transparent inclined surface portion, and the base end width of the tip of the bottom portion are each configured to successively narrower in width. Therefore, when a sandwich is inserted from the open back portion, the back and the ceiling portion of the triangular space from the back become gradually expanding spaces from the front, making it easier to insert a sandwich whose center and ends have expanded with ingredients. After insertion, the expanded shape of the commercialized sandwich packaging bag makes it easy to visually confirm the adhesion between the sandwich and the packaging bag, suggesting to the purchaser the high degree of filling of the sandwich, and further visually improving the product value.

FIG. 2 is a development view showing an assembly sheet for the sandwich packaging bag according to the first embodiment. 1 is a perspective view showing a state in which an assembly sheet for a sandwich packaging bag according to a first embodiment is boxed and the bottom portion is opened. FIG. FIG. 11 is a development view showing an assembly sheet for a sandwich packaging bag according to a second embodiment. FIG. 11 is a development view showing an assembly sheet for a sandwich packaging bag according to a third embodiment. FIG. 11 is a perspective view showing a state in which the assembly sheet for the sandwich packaging bag according to the third embodiment is boxed and the bottom portion is opened. FIG. 11 is a perspective view showing a state in which the assembly sheet for the sandwich packaging bag according to the third embodiment is boxed and a sandwich is enclosed. FIG. 13 is a development view showing an assembly sheet for a sandwich packaging bag according to a fourth embodiment. FIG. 13 is a perspective view showing a state in which an assembly sheet for a sandwich packaging bag according to a fourth embodiment is boxed and the bottom part is opened. 1 is a perspective view showing a state in which the assembly sheet for the sandwich packaging bag according to the first embodiment is completely assembled and a sandwich is sealed inside. FIG. 1 is a right rear perspective view showing a state in which the assembly sheet for the sandwich packaging bag according to the first embodiment is completely assembled and a sandwich is sealed inside. FIG.

The gist of this invention is that it is characterized in that it is composed of left and right triangular facets formed into a right triangle, and a peripheral wrapping band for sandwich packaging, the width of which is the thickness of the sandwich and the length of the rectangle is the length of the outer periphery of the right-angled triangle sandwich, and the inclined surface edges of the left and right triangular facets are respectively connected to the left and right end edges of the middle part of the peripheral wrapping band so as to be freely folded, and the peripheral wrapping band is composed of a back portion that corresponds to the vertical back surface of the sandwich when packaged and has a separation breaking line for separating the left and right sides of the approximately center line of the back surface of the wrapping band in the longitudinal direction, a transparent inclined surface portion that corresponds to the inclined surfaces of the sandwich when packaged, a bottom portion that corresponds to the bottom surface of the sandwich when packaged, and a tab portion that can be foldable in two and is interposed between the transparent inclined surface portion and the back portion.
In addition, in order to assemble a sandwich packaging bag using the peripheral wrapping band and the left and right triangular bodies, adhesive margins are extended to the right-angled sides of the left and right triangular bodies, the left and right sides and tip sides of the back part, and the left and right sides and tip sides of the bottom part.
In addition, the peripheral wrapping band is characterized in that the base end width of the back portion, the bottom side width of the transparent inclined surface portion, and the base end width of the tip end of the bottom portion are successively narrower in width, so that the back portion is formed into an inverted trapezoid that is wider at the top when wrapped, the transparent inclined surface portion is formed into an inverted trapezoid that is wider at the top when wrapped, and the bottom portion is formed into an inverted trapezoid that is wider at the front when wrapped.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described in detail with reference to the accompanying drawings.
FIG. 1 is an overall explanatory view showing an assembly sheet for a sandwich packaging bag according to a first embodiment, and FIG. 2 is a perspective view showing the sandwich packaging bag before a sandwich is inserted from the assembly sheet for the sandwich packaging bag according to the first embodiment.

As shown in Figure 1, this embodiment of the invention is composed of left and right triangular bodies 10, 20 formed into a right triangle, and a peripheral wrapping band 30 for sandwich packaging, whose width is the thickness of the sandwich and whose rectangular length is the perimeter of the right triangle sandwich.

That is, the left and right triangular surfaces 10 and 20 protrude from the left and right edge portions 30A and 30B of the band-shaped peripheral wrapping band 30, approximately in the center, and these components are made from a single sheet of paper material.

In the present invention, such a single paper sheet is folded appropriately to form a packaging bag that matches the shape of a sandwich, and this assembly and processing work is performed by a sandwich packaging device of a different invention that automatically assembles and processes the paper sheet of the present invention, but this device will not be described in the examples of the present invention.

As shown in Figure 1, the main configuration of the present invention is that the left and right triangular faces 10, 20 protrude from the left and right edge portions 30A, 30B of the band-shaped peripheral wrapping band 30 at approximately the center, and the back portion 31, the transparent inclined surface portion 32 corresponding to the inclined surface of the sandwich when wrapped, the bottom surface portion 33 corresponding to the bottom surface of the sandwich when wrapped, etc. are arranged in a straight line in parallel from the end of the peripheral wrapping band 30, and a tab portion 34 configured to be foldable in two is interposed between the transparent inclined surface portion 32 and the back portion 31. Moreover, these components are made of a single paper sheet and are assembled into a sandwich packaging form in an assembly-type configuration.

The components constituting the first embodiment of the present invention will be described below in order.
(1) Regarding the left and right triangular bodies 10, 20 The left and right triangular bodies 10, 20 protruding from the left and right edge portions 30A, 30B at approximately the center of the band-shaped peripheral wrapping strip 30 are formed in the shape of right-angled triangles, and are folded at the protruding boundary lines to form the left and right side surfaces of the sandwich. Furthermore, narrow adhesive margins 10a, 10b, 20a, 20b, 31a, 31b, 31c, 33a, 33b, 33c extend from the right-angled sides 10A, 10B, 20A, 20B of the left and right triangular bodies 10, 20, the left and right sides 31A, 31B and tip side 31C of the back surface 31, and the left and right sides 33A, 33B and tip side 33C of the bottom surface 33, and function as adhesive margins when assembling them into a triangular shape.

In addition, such adhesive margins are overlapped and adhered to the outside of the packaging during assembly. In order to automatically assemble a single paper sheet by a machine, such adhesive form necessarily requires a structure that adheres the components to the outside (outside) of the packaging bag as much as possible from the standpoint of the machine structure.
That is, when assembled into a packaging bag, the adhesive portions of the constituent members protrude outward with the adhesive margins of the two sheets overlapping each other.

(2) Regarding the rear portion 31 The rear portion 31 of the peripheral wrapping band 30 is formed at the uppermost portion of the peripheral wrapping band 30, and in the sandwich packaging form, is folded backward from the transparent inclined surface portion 32 of the triangular inclined surface to be positioned at the triangular rear surface.

In addition, adhesive margins 31a, 31b, 31c are extended from the left and right side portions 31A, 31B and the tip side portion 31C of the back portion 31, and are superimposed and adhered to adhesive margins 10a, 20a of the left and right triangular bodies 10, 20 and adhesive margin 33c of the bottom portion 33. The overlapping adhesive margins 31a, 31b, 31c and adhesive margins 10a, 20a, 33c are in an overlapping form protruding outward as described above.

The back portion 31, which corresponds to the vertical back surface of the sandwich when packaged, is provided with a tear-off break line 31D for tearing off the approximate center line of the back surface of the peripheral wrapping band 30 to the left and right in the longitudinal direction, so that when the sandwich is to be removed from the packaging bag to eat it, the back portion 31 is torn along the tear-off break line 31D and the sandwich can be removed from the rear.

In the present invention, the separation break line 31D is configured by forming multiple notch slits 31d on both sides at a constant interval and in an inclined manner. The multiple notch slits 31d are formed at a constant interval and in an inclined manner that slopes diagonally upward toward the cutting direction.

(3) Regarding the transparent inclined surface portion 32 The transparent inclined surface portion 32 is used to package the inclined portion of the sandwich in accordance with the inclined surface of the sandwich when packaged, and a transparent film F (see Figures 1 and 9) is stretched within the frame so that the cross section of the sandwich ingredients can be visually confirmed.
This transparent inclined surface portion 32 constitutes the main portion of the peripheral wrapping band 30 and is the wrapping portion that most attracts the attention of the purchaser when the sandwich is displayed in a wrapped state.

(4) Bottom surface portion 33 Bottom surface portion 33 is located at the lowest end of peripheral wrapping band 30 and corresponds to the bottom surface of the sandwich when wrapped. Left and right side portions 33A, 33B and tip side portion 33C of bottom surface portion 33 are connected to left and right triangular bodies 10, 20 and back surface portion 31 via adhesive margins 33a, 33b, 33c.

(5) Regarding the knob portion 34: This is a foldable rectangular portion located between the transparent inclined surface portion 32 and the back surface portion 31, and when assembled, is folded at the joint between the upper edge portion 32A of the transparent inclined surface portion 32 and the upper edge portion 31E of the back surface portion 31 and is erected in a protruding state (see Figures 1, 6, and 10).

As described above, the present invention is composed of the left and right triangular faces 10, 20 connected to the peripheral edge of the peripheral wrapping band 30 in a freely foldable manner, the back portion 31 corresponding to the rear surface of the sandwich, the transparent inclined surface portion 32 corresponding to the inclined surface of the sandwich when wrapped, the bottom surface portion 33 corresponding to the bottom surface of the sandwich when wrapped, and the handle portion 34 that can be folded in two and is interposed between the transparent inclined surface portion 32 and the back portion 31. Furthermore, among the components of the present invention, the back portion 31, the handle portion 34, the transparent inclined surface portion 32, and the bottom portion 33 are not uniform in width but are gradually wider from the back portion 31 to the handle portion 34, and are gradually narrower from the handle portion 34 to the bottom portion 33.

In other words, the base end width of the back surface portion 31, the bottom side width of the transparent inclined surface portion 32, and the base end width of the tip of the bottom surface portion 33 are successively narrower in width, so that the back surface portion 31 is formed into an inverted trapezoid that is wider at the top when packaged, the transparent inclined surface portion 32 is formed into an inverted trapezoid that is wider at the top when packaged, and the bottom surface portion 33 is formed into an inverted trapezoid that is wider at the front when packaged.

By varying the width of the components within a certain range, when the final product is assembled into a sandwich-shaped packaging bag, the sandwich can be easily inserted into the bag space from the open back portion 31, allowing the final product distribution form of the sandwich to be completed.

In the manufacturing process for packaging such sandwiches, each component of the peripheral wrapping band 30 is formed into an inverted trapezoid shape, and the base end width of the back portion 31, the bottom side width of the transparent inclined surface portion 32, and the base end width of the tip edge portion 33C of the bottom portion 33 are each configured to be successively narrower. This allows the back and ceiling portions of the triangular space from the back to gradually expand from the front when the sandwich is inserted from the open back portion 31, making it easier to insert the sandwich, whose center and ends are expanded with ingredients, horizontally into the bag, and the expanded shape of the packaging bag after insertion allows the adhesion between the sandwich and the packaging bag to be visually confirmed, and the filling state of the sandwich is expanded so that it can be visually confirmed by the purchaser, improving the display value of the sandwich.

Second Example
A second embodiment of the present invention will now be described with reference to the drawings.
3 is an overall explanatory diagram showing a second embodiment of an assembly sheet for sandwich packaging bags. In the second embodiment, the configurations of the back portion 31', bottom portion 33', and tab portion 34' of the peripheral wrapping band 30' in the assembly sheet S1 for sandwich packaging bags are different from those in the first embodiment. The other configurations (left and right triangular faces 10, 20, transparent inclined surface portion 32) are the same, so the description thereof will be omitted.

In the assembly sheet S1 for the sandwich packaging bag in the second embodiment, the rear gripping portion 34b located on the rear side of the gripping portion 34 ' and the rear portion 31 ' are disposed at the bottom of the peripheral wrapping strip 30' as shown in Fig. 3. That is, the transparent inclined surface portion 32 and the front gripping portion 34a are disposed at the top of the peripheral wrapping strip 30', and the rear portion 31' and the rear gripping portion 34b are disposed at the bottom.

The back portion 31' is formed at the bottom of the peripheral wrapping band 30', and in the sandwich wrapping form, it is folded backward from the bottom portion 33, which is located at the bottom when wrapped, to form a triangular rear surface.

In addition, adhesive margins 31a, 31b are extended from the left and right side portions 31A, 31B of the back surface portion 31' and are superimposed and adhered to the adhesive margins 10a, 20a of the left and right triangular bodies 10, 20. The overlapping adhesive margins 31a, 31b and adhesive margins 10a, 20a are in an overlapping form that protrudes outward.

The gripping portion 34' is made up of a front gripping portion 34a located on the front side in a sandwich packaging configuration, and a rear gripping portion 34b located on the rear side.
The front knob 34a is connected to the upper edge 32A of the transparent inclined surface portion 32, and the rear knob 34b is connected to the upper edge 31E of the rear portion 31'.
When the assembly sheet S1 is packaged, the rear side of the front gripping portion 34a and the rear side of the rear gripping portion 34b are adhered to each other so as to protrude upward.

In addition, a tear-off break line 31D is formed from the rear grip portion 34b to the bottom surface portion 33'. The tear-off break line 31D can open the sandwich packaging bag sealed with the rear grip portion 34b as the base point.

As described above, the second embodiment of the present invention is composed of the left and right triangular faces 10, 20 connected to the peripheral edge of the peripheral wrapping band 30' in a freely foldable manner, the back portion 31' corresponding to the rear surface of the sandwich, the transparent inclined surface portion 32 corresponding to the inclined surface of the sandwich when wrapped, the bottom surface portion 33' corresponding to the bottom surface of the sandwich when wrapped, and the knob portion 34' provided on the upper part of the transparent inclined surface portion 32 and the lower part of the back portion 31'. Furthermore, among the components of the second embodiment, the back portion 31', the knob portion 34', the transparent inclined surface portion 32, and the bottom portion 33' are not uniform in width, but are gradually narrowed from the upper edge portion 31E of the back portion 31 to the joint portion of the back portion 31' and the bottom portion 33', and are gradually narrowed from the front knob portion 34a to the joint portion of the bottom portion 33' and the back portion 31'.

With this configuration, the assembly sheet S1 can be used to make a sandwich packaging bag from a single sheet, and assembly by machine can be easily performed. Moreover, when sealing a sandwich into the packaging bag, the positioning for the packaging bag can be performed simply by aligning the adhesive surfaces of the rear side knob portion 34b and the front side knob portion 34a, making it easy to assemble by machine.

Third Example
A third embodiment of the present invention will now be described with reference to the drawings.
FIG. 4 is an exploded view showing a third embodiment of an assembly sheet for a sandwich packaging bag, FIG. 5 is an oblique view showing a sandwich packaging bag before a sandwich is inserted from the assembly sheet S2 for the sandwich packaging bag of the third embodiment, and FIG. 6 is an oblique view showing the third embodiment after a sandwich has been enclosed and the packaging bag is sealed.

In the third embodiment, the positions and configurations of the back surface portion 31'', transparent inclined surface portion 32'', and bottom surface portion 33'' of the peripheral wrapping band 30'' in the assembly sheet S3 of the sandwich packaging bag are different from those in the first embodiment. The other configurations (left and right triangular bodies 10, 20, and handle portion 34) are the same, so the description thereof will be omitted.

As shown in FIG. 4, the sandwich packaging bag assembly sheet S2 in the third embodiment has the bottom portion 33'' disposed at the top of the peripheral wrapping band 30''. In other words, the peripheral wrapping band 30'' is connected from the top to the bottom in the order of the bottom portion 33'', back portion 31'', tab portion 34, and transparent inclined surface portion 32.

The bottom portion 33'' is formed at the top of the peripheral wrapping band 30'', and in the sandwich wrapping form, it is folded forward from the back portion 31, which is located at the back when wrapped, to form a triangular bottom.

In addition, adhesive margins 33a, 33b, and 33d are extended from the left and right side portions 33A, 33B and the tip side portion 33D of the bottom surface portion 33'', and are superimposed and adhered to adhesive margins 10b, 20b of the left and right triangular surfaces 10, 20 and adhesive margin 32b of the transparent inclined surface portion 32''. The overlapping adhesive margins 33a, 33b, and 33d and adhesive margins 10a, 20a, and 32b are in an overlapping form that protrudes outward.

The back portion 31'' is connected to the lower part of the bottom portion 33''. When the sandwich is packaged, the back portion 31'' is folded upward from the upper edge 31E of the tab portion 34, forming a triangular back portion.

In addition, adhesive margins 31a, 31b are extended from the left and right side portions 31A, 31B of the back surface portion 31'', and are superimposed and adhered to the adhesive margins 10a, 20a of the left and right triangular bodies 10, 20. The overlapping adhesive margins 31a, 31b of the back surface portion 31'' and the adhesive margins 10a, 20a of the left and right triangular bodies 10, 20 are in an overlapping form that protrudes outward.

The back portion 31'' has a tear-off break line 31D for tearing off the left and right sides of the approximate center line of the back of the peripheral wrapping band 30'' in the longitudinal direction. As shown in Figures 4 and 5, the tear-off break line 31D starts at the tab 34 and ends at the bottom portion 33''. When the wrapped sandwich is to be removed from the packaging bag to eat, the back portion 31'' and the bottom portion 33'' are torn off at the tear-off break line 31D, leaving two sides open. This allows the sandwich to be easily removed. The cutout slit 31d has the same structure as in the first embodiment.

The transparent inclined surface portion 32'' is formed at the bottom of the peripheral wrapping band 30'', and the adhesive margin portion 32b extends from the lower edge portion 32B. In the sandwich packaging form, a transparent film F is stretched so that the ingredients of the packaged sandwich can be seen, and the adhesive margin portion 33d of the bottom portion 33'' and the adhesive margin portion 32b of the transparent inclined surface portion 32'' are adhered to each other to seal the sandwich packaging bag in a triangular shape.

As described above, the third embodiment of the present invention is composed of the left and right triangular surfaces 10 and 20 connected to the peripheral edge of the peripheral wrapping band 30'' in a manner that allows them to be folded freely, the back surface portion 31'' corresponding to the rear surface of the sandwich, the transparent inclined surface portion 32'' corresponding to the inclined surface of the sandwich when wrapped, the bottom surface portion 33'' corresponding to the bottom surface of the sandwich when wrapped, and the handle portion 34 interposed between the transparent inclined surface portion 32'' and the back surface portion 31'', and the structure of the present invention Among the components, the back portion 31'', the handle portion 34, the transparent inclined surface portion 32'', and the bottom portion 33'' are not uniform in width, but are configured to gradually narrow from the upper edge portion 31E of the back portion 31'' to the connection portion between the back portion 31'' and the bottom portion 33'', and gradually widen from the connection portion between the back portion 31'' and the bottom portion 33'' to the tip edge portion 33D of the bottom portion 33'', and further, the separation break line 31D is configured to be continuous from the handle portion 34 to the bottom portion 33''.

With this configuration, the assembly sheet S2 can be used to construct a sandwich packaging bag from a single sheet, and assembly can be easily performed by machine. Furthermore, when opening and removing the sandwich enclosed in the packaging bag, the back surface portion 31'' and bottom surface portion 33'' can be cut along the separation breaking line 31D, allowing two sides to be opened, making it easy to remove the sandwich.

<Fourth Example>
A fourth embodiment of the present invention will now be described with reference to the drawings.
FIG. 7 is a development view showing a fourth embodiment of an assembly sheet for a sandwich packaging bag, and FIG. 8 is a perspective view showing the sandwich packaging bag of the fourth embodiment in a state before it is sealed.
In the fourth embodiment, the configuration of the left and right triangular bodies 10, 20 in the assembly sheet S3 of the sandwich packaging bag is different from that in the first embodiment. The other configurations (the back portion 31, the transparent inclined surface portion 32, and the bottom portion 33 constituting the peripheral wrapping band 30) are the same, so the description thereof will be omitted.

As shown in FIG. 7, the sandwich packaging bag assembly sheet S3 in the fourth embodiment differs from the first embodiment in the right-angled side portions 10A', 20A' of the left and right triangular bodies 10', 20' and the adhesive margins of the adhesive margins 10a', 20a' extending from the right-angled side portions 10A', 20A'. That is, the upper edge portions of the adhesive margins 10a', 20a' of the left and right triangular bodies 10', 20' are configured to be connected to the upper edge portion 32A. In other words, the left and right triangular bodies 10', 20' have smaller areas than the left and right triangular bodies 10, 20.

8, in the assembly sheet S3, the front side of the adhesive margins 31a, 31b is joined to the back side of the adhesive margins 10a', 20a' when the left and right triangular bodies 10', 20' are joined to the back surface 31. In other words, the joint surfaces of the adhesive margins 10a', 20a' of the left and right triangular bodies 10', 20' and the adhesive margins 31a, 31b of the back surface 31 can be joined while being stored in the sandwich storage space.
The front side here refers to the surface that can be seen in the development view of FIG. 7, and the back side refers to the surface that cannot be seen.

With this configuration, the assembly sheet S3 can be used to construct a sandwich packaging bag from a single sheet, and machine assembly can be easily performed. Moreover, when assembling the sandwich so that it can be stored, the left and right triangular bodies 10', 20' and the back surface 31 can be joined simply by aligning the right angle sides 10A', 20A' with the left and right sides 31A, 31B. Furthermore, when sealing the open bottom surface 33 after inserting the sandwich, the adhesive margins 33a, 33b, 33c of the bottom surface 33 are joined to the adhesive margins 10b, 20b of the left and right triangular bodies 10', 20' and the adhesive margin 31c of the back surface 31 by protruding outward, making machine assembly easy.

The process of assembling the sandwich packaging bag assembly sheets described in the first to third embodiments into a packaging bag using a separately provided sandwich packaging device and storing the bare sandwich in the packaging bag will be described. Note that the sandwich packaging bag assembly sheet S described in the first embodiment will be used in the description.

First, the assembly sheet S of the sandwich packaging bag of the present invention is placed in an unfolded state at the starting end of the sandwich packaging device. Various procedures can be used to assemble the assembly sheet S in the sandwich packaging device, but the simplest procedure will be described here.

With the assembly sheet S unfolded, the peripheral wrapping band 30 is inserted into the sandwich wrapping device in the longitudinal direction.

During the travel through the device, the peripheral wrapping band 30 is successively folded at each connecting portion of the back portion 31, the tab portion 34, and the transparent inclined surface portion 32 to form a right-angled triangular solid body excluding the bottom portion 33. Moreover, the solid body with the bottom portion 33 being an open triangle that has not been folded has the inclined transparent inclined surface portion 32 placed on the travelling belt, with the right angle portion facing straight up (see FIG. 2).
In order to maintain this shape, a right-angled core is folded and stored in a triangular solid shape when the peripheral wrapping band 30 is folded.

Then, the left and right triangular bodies 10 and 20 are folded to close the sides of the folded peripheral wrapping band 30, completing a right-angled triangular solid with an open bottom portion 33.

In the process of assembling the solid object, the sides extending to the periphery of the back surface 31, the left and right triangular bodies 10 and 20, and the bottom surface 33 are made into adhesive margins 33a, 33b, and 33c, so that when assembling the solid object, the adhesive margins 33a, 33b, and 33c are adhered to the adhesive margins 10b, 20b, and 31c to form a solid object with a reliable right-angled triangle. In particular, when these adhesive margins are connected to each other, the adhesive margins are made to protrude outward. In other words, the adhesive margins are joined at their surfaces in the development view of FIG. 1. Note that the "surface" referred to here is the surface that can be seen in the development view of FIG. 1.

The outward protrusion of the adhesive margins allows for smoother storage of the sandwiches in the final process, while also preventing adhesive and food objects from coming into contact with the sandwiches as much as possible for hygienic reasons when eating the stored sandwiches. Furthermore, by making the adhesive margins protrude outward, it becomes easier to heat and press the adhesive margins together during the process of assembling them into a right-angled triangular solid, which has the effect of facilitating three-dimensional assembly and allowing bonding at low heating temperatures.

With the bottom portion 33 open, the sandwich is stored from the open bottom portion with the inclined surface facing downward, and then the bottom portion 33 is closed to complete the sandwich packaging operation.
When the sandwich is finally packed away, the core used to maintain the assembled shape is of course removed.

It goes without saying that the packaging technology used by the packaging device using the assembly sheet described above can be modified as appropriate depending on the technology of the sandwich packaging device.

S, S1, S2, S3 Assembly sheet F Transparent film 10, 10' Left triangular face 10A, 10A', 10B, 10B' Right-angled side portion 10a, 10a', 10b, 10b' Adhesive margin portion 20, 20' Right triangular face 20A, 20A', 20B Right-angled side portion 20a, 20a', 20b Adhesive margin portion 30, 30', 30'' Peripheral wrapping band 30A Left edge portion 30B Right edge portion 31, 31', 31'' Back portion 31A Left edge portion 31B Right edge portion 31C Tip edge portion 31a, 31b, 31c Adhesive margin portion 31D Separation breaking line 31d Notch slit 31E Upper edge portion 32, 32'' Transparent inclined surface portion 32A Upper edge portion 32B Lower edge portion 32b Adhesive margin portion 33, 33', 33'' Bottom portion 33A Left side portion 33B Right side portion 33C, 33D Tip side portion 33a, 33b, 33c Adhesive margin portion 34, 34' Knob portion

Claims (2)

An assembly sheet for a sandwich packaging bag constructed in an assembly-type manner from a paper sheet and a transparent film ,
The paper sheet is composed of left and right triangular surfaces formed into a right triangle, and a peripheral wrapping band for wrapping the thickness of the right triangle sandwich,
The inclined surface edges of the left and right triangular faces are connected to the left and right end edges of the middle part of the peripheral wrapping band in a freely bendable manner,
The peripheral wrapping band is
A back portion having a tear-off break line that corresponds to the vertical back surface of the sandwich when wrapped and is used to tear off the left and right sides of the approximately center line of the back surface of the wrapping strip in the longitudinal direction;
a transparent inclined surface portion in which the transparent film is stretched within a frame corresponding to the inclined surface of the sandwich when packaged;
a bottom portion corresponding to the bottom of the sandwich when packaged;
A tab portion that can be folded in two and is interposed between the transparent inclined surface portion and the back surface portion,
In order to assemble and configure a sandwich packaging bag using the peripheral wrapping band and the left and right triangular bodies, adhesive margins are extended to a pair of right-angled sides of the left and right triangular bodies, the left and right sides of the back surface, and the left and right sides of the bottom surface;
An assembly sheet for a sandwich packaging bag, characterized in that the adhesive margin of at least one of a pair of right-angled sides of the left and right triangular faces is overlapped with the adhesive margins of the left and right sides of the back face or the adhesive margins of the left and right sides of the bottom face to form an overlapping shape that protrudes outward. The sandwich packaging bag assembly sheet according to claim 1, characterized in that the peripheral wrapping band is configured such that the base end width of the back portion, the bottom side width of the transparent inclined surface portion, and the base end width of the tip end of the bottom portion are successively narrower, so that the back portion is formed into an inverted trapezoid that is wider at the top when wrapped, the transparent inclined surface portion is formed into an inverted trapezoid that is wider at the top when wrapped, and the bottom portion is formed into an inverted trapezoid that is wider at the front when wrapped.

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