JP2010247543A - Device for sealing paper bag bottom - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the following problem: in a conventional method of transferring a glue agent, it is necessary to clean many mechanical glue-transferred components, such as a plate cylinder and mold die components, later. <P>SOLUTION: Regarding the device for sealing the bottom of a paper bag 1, a cross-base is formed by folding the paper bag 1, and the ends of tubular segments are folded to produce the bottom. Glue layers are applied to adhere the bottoms and sealing sheets. The device is provided with at least one gluer, at least one glue reservoir 21 or at least one glue duct, the glue contained in the reservoir or in the duct being exposed to a pressure higher than ambient pressure. The glue passing through at least one glue output orifice 71 is directly applied to the sheets and/or to the folded bottoms 1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an apparatus for sealing the bottom of a paper bag as described in the preamble of claim 1.

  This type of device is used to produce a variety of different types of bags. Such bags include cement bags that are usually manufactured as valve bags. For this purpose, a sealing paper with a valve is usually inserted into the bottom of the folded bag. However, it is important to distinguish between bags that are pinched, thickly cut, and folded and crossed. For example, DE 090 145 48 U1 and DE 3020043A1 disclose a method for manufacturing bags with crossed bottoms, which require special requirements for adhesive application.

DE 090 145 48 U1 DE 3020043 A1

  In all these types of devices, the bottom of the bag is formed with the aid of an adhesive, usually a starchy adhesive. For this purpose, as described in the preamble of claim 1, a layer of adhesive is applied to the folded bottom or valved sealing paper, or both, and then they are integrated. Each bag component is coated with adhesive by contacting a mold part, such as an adhesive roller or other adhesive storage or transfer element. The mold part is attached to a rotating roller, and is commonly called a letterpress. When the adhesive roller is rotated, an adhesive is supplied to the mold part. As the roller continues to rotate, the adhesive adhering to the surface of the mold part is transferred to each component of the bag. For this purpose, the mold part is provided with a raised part (protrusion) that is adapted to match the shape and size of a particular bag. When manufacturing a bag of another size, the mold parts are exchanged in an apparatus for sealing the bottom of the bag.

Spreading the adhesive by the above method proved successful when used in a device that seals the bottom of a paper bag, as it can properly apply a large amount of starchy adhesive that is difficult to handle. is doing.
However, such adhesive transfer methods require that many mechanical adhesive transfer parts, such as plate cylinders and mold parts, be later cleaned.
The object of the present invention is therefore to eliminate these components.

In order to solve the above problems, the present invention provides:
With at least one adhesive applicator,
The adhesive applicator comprises at least one adhesive reservoir or at least one adhesive conduit, in which a pressure higher than atmospheric pressure is applied to the adhesive,
At least one adhesive reservoir or at least one adhesive conduit is provided with at least one adhesive outlet orifice through which the adhesive is applied directly to the sealing paper and / or the folded bottom. It is characterized by that.
In an advantageous embodiment of the invention, the adhesive can be moved relative to the components of the bag to which the adhesive is to be applied, and the adhesive is held in a device that seals the bottom of the bag. Components such as adhesive reservoirs and adhesive conduits do not contact the bag components. For this purpose, the exit orifice is suitably spaced from the part to which the adhesive is applied. The adhesive may be sprayed onto the part to which the adhesive is to be applied. According to this non-contact type adhesive application, the shape of the surface on which the adhesive is applied is prevented from being blurred or distorted by contact.

However, the contour of the adhesive application may be intentionally widened by the components of the adhesive application device. In particular, when the adhesive is not applied over the entire surface but is applied in the form of an adhesive sweep line, for example, the entire surface can be covered by spreading the adhesive sweep line. Such spreading is also possible by direct contact between the adhesive reservoir or adhesive conduit and the sweep line of adhesive. However, in principle, an additional roller may be used to spread or crush the adhesive sweep.
In another advantageous embodiment according to the invention, the adhesive application head comprises a number of outlet orifices.

FIG. 1 is a view showing a coating apparatus for sealing paper at the bottom of a bag according to the prior art. FIG. 2 is a diagram showing an apparatus for applying to the crossed bottoms of bags according to the prior art. FIG. 3 is a perspective view showing an adhesive application device according to the present invention. FIG. 4 is a view showing a state in which the adhesive application device according to the present invention applies the adhesive in a complicated form. FIG. 5 (a) is a side view illustrating an embodiment of an adhesive conduit for supplying adhesive to a valve according to the present invention. FIG. 5B is a top view showing the embodiment of FIG. FIG.5 (c) is another side view shown about embodiment of Fig.5 (a). FIG. 6 is a view showing a coating head having a plurality of rows of valves. FIG. 7A is a side view showing the coating head, and shows the side facing the component to which the adhesive is applied. FIG. 7B is a schematic view showing an adhesive conduit from the valve to the outlet orifice in the coating head according to the embodiment of FIG. 7A. FIG.7 (c) is the enlarged view which showed a part of FIG.7 (b). FIG. 8A is a plan view showing a coating head that can move in the y direction. FIG. 8B is a plan view showing a coating head that can move in the y direction. FIG. 8C is a plan view showing a coating head that can move in the y direction. FIG. 9A is a view showing the sealing paper 2 in which the shape of the adhesive application surface is U-shaped. FIG. 9B is a diagram showing the sealing paper 2 in which the shape of the adhesive application surface is a rectangular frame shape.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The accompanying drawings also show a device according to the prior art, together with an adhesive applicator for bags with crossed bottoms. The device according to the invention shown is for applying an adhesive only to the bottom sealing paper 2. However, according to this apparatus, the adhesive can be similarly applied to the folded bottom 1 of the bag.
FIG. 1 shows an adhesive application device that is commonly used to apply adhesive to the bottom sealing paper 2 according to the prior art. In this apparatus, the adhesive is transferred from the adhesive roller 11 to the mold part or the relief plate 12. The mold part or the relief plate 12 is supported by the plate cylinder 13, and the mold part rotates in the direction of the arrow 16 about the axis of the plate cylinder 13. During this rotational movement, the mold part or letterpress 12 transfers the adhesive to the bottom sealing paper 2, and the bottom sealing paper is conveyed by the gripping cylinder 14 during the transfer of the adhesive. The bottom sealing paper 2 is conveyed in advance in the direction of the arrow X along the broken line 18 by a conveying device (not shown) in advance, and passes through the gap between the plate cylinder 13 and the gripping cylinder 14. When the gripping cylinder 14 rotates in the direction of the arrow 15, the sealing paper coated with the adhesive is superimposed on the bottom 1 of the bag. The bottom 1 of the bag is transported in the direction of arrow W by a transport device (not shown). Thus, the bottom 1 of the bag 19 is sealed.
A pressing force acts between the gripping cylinder 14 and the bag transport device to bring the sealing paper 2 and the bottom of the bag into pressure contact with each other and permanently bond them.

FIG. 2 shows another commonly used adhesive application device 20 for applying adhesive to the bottom 1 of a bag. For this reason, the mold parts or relief plates 22 attached to the outer periphery of the plate cylinder 23 come into contact with the adhesive transfer cylinder 28 when the plate cylinder 23 rotates about the axis 25 in the direction of the arrow 27, and the adhesive Adheres. For this purpose, the mold part 22 is provided with a notch not shown, similar to the mold part 12. These depressions are filled with adhesive when in contact with the adhesive transfer roller.
The adhesive transfer roller 28 narrows the opening of the adhesive reservoir 21. When this roller rotates, the adhesive is transferred from the adhesive reservoir 21 to the relief plate 22 along its circumference.
When the plate cylinder 23 further rotates, the mold part or the relief plate 22 reaches the gap 24 between the cylinder 29 and the plate cylinder 23. Here, the relief plate 22 transfers the adhesive to the bottom 1 of the bag. The bag is conveyed in advance along the broken line 26 by a conveying device (not shown) and passes through the gap between the rollers.
When changing the shape and size of the bag, the mold parts 12 and 22 are replaced with another mold part corresponding to the new shape and size of the bag.

FIG. 3 shows an adhesive applicator 30 for applying adhesive to the sealing paper for the crossed bottom of the bag according to the present invention. Adhesive sweep lines 3 are applied to individually separated sealing papers 2 conveyed in the direction of arrow x. For this purpose, the adhesive application device 30 includes an application head 31. An adhesive is sent to the coating head via a pipe 33. Inside the application head 31, the adhesive is distributed to the valve 32 by a suitable adhesive conduit. Two rows of valves are arranged in the coating head 31 in a direction crossing the conveying direction x of the sealing paper 2. These valves 32 can at least release the adhesive flow and stop the release. The valve 32 is controlled by an external, preferably electrical signal, and can withstand the pressure of the adhesive.
An adhesive outlet orifice 71 is provided on the lower surface of the coating head 31 that is not visible in FIG. 3, and the adhesive is discharged from the coating head 31 through the orifice. Is formed. An arrow x indicates the conveyance direction of the sealing paper 2, and an arrow y indicates a horizontal direction orthogonal thereto.

  FIG. 4 shows an adhesive application device 40 that is externally identical to the adhesive application device 30 of FIG. Different adhesive sweep lines 44-47 indicate that the apparatus can be applied in almost different forms without the use of mold parts or reliefs. According to this apparatus, the spread of the adhesive application region in the width direction of the relief printing, that is, the y direction can be changed by switching the valve on / off during the manufacture of the bag. The valve is not open for the entire period of application of adhesive to the sealing paper 2, 48, or for the entire period of application of adhesive to the bottom of a bag of one shape and size. Can be switched off. Thereby, as shown in FIG. 3, the shape of the rectangular adhesive application surface can be obtained. This is formed by an adhesive sweep line 3,47 from end to end having approximately equal length.

To this end, a valve that was open while applying adhesive to a predetermined shape and size is once closed after forming the sweep line 47 of adhesive from end to end. The valve is reopened when the next sealing paper 48 that has not yet been coated with adhesive reaches the adhesive outlet orifice. In order to apply this sequence to the application speed of adhesives which is common in the industry, considerable requirements are required for the switching time of the valve 32. If the shape and size of the adhesive to be applied and the amount of adhesive to be applied are further changed, the valve 32 is compared to the case of forming a continuous adhesive sweep line 47 from end to end. Must open and close even faster.
Thus, the amount of adhesive applied can be varied considerably, particularly by applying the adhesive as a sweep line 44 that breaks several times. In order to further change the shape and size of the adhesive application surface to be different from the rectangular shape, the adhesive may be applied as the short sweep line 45 and the interrupted sweep line 46. For example, as shown in FIGS. 9 (a) and 9 (b), 4a) U-shaped or 4b) rectangular frame-shaped shape 4 of the adhesive application surface is often required. This requires separate control of the valves during application of the adhesive to the bag components 1 and 2.

In a device for sealing the bottom of the bag, it is advantageous if the on / off switching time of the valve 32 is shorter than 5 ms. In such a case, by changing the sweep line of each adhesive in the x direction, the shape of the adhesive application surface required in the industry at the generally adopted application speed of the adhesive as described above. And most variations in size can be realized.
In the apparatus according to the present invention, if the valve can be switched on and off at a higher speed, it can be imagined from the variety of the sweep lines 45 to 47 of the adhesive how much free application shape can be obtained. .

The design shown in FIGS. 3 and 4 is suitable for applying an adhesive to the sealing paper 2 that has been separated separately, and can also apply the adhesive to a piece of paper before being separated. In the case of the bottom of the bag, the adhesive can be applied in a similar manner.
FIGS. 5A to 5C show a state in which a conduit is provided in the coating head 50 according to the preferred embodiment and is coupled to the valve 32. In order to prevent complication of FIGS. 5A to 5C, the adhesive outlet orifice 71 and the adhesive conduit connected from the valve 32 to the adhesive outlet orifice 71 are not shown.
5 (a) and 5 (b), the adhesive conduit is provided as two transverse passages 52 and 53 as indicated by broken lines. These passages are arranged inside the coating head 50 in a direction substantially perpendicular to the direction x in which the sealing paper 2 and the bottom 1 of the bag are conveyed. In FIG. 5 (c), these two adhesive passages 52 and 53 embodiments are shown as round holes for manufacturing reasons. However, a passage having another shape may be used.

An adhesive passage 55 rises from the adhesive passages 52 and 53 in the vertical z direction. Adhesive is led directly to the valve 32 from these passages 55.
It is advantageous to connect both the adhesive passages 52 and 53 at the tip of the application head opposite to the tip to which the adhesive supply pipe is connected. In order to combine the two, another path that runs in the x direction is added to the coating head 50. Thus, the adhesive flows from the supply pipe into the adhesive passage 52, passes through the coupling passage, passes through the adhesive passage 53, and is finally discharged from the adhesive discharge port. Thus, in such a coating head, it is possible to circulate the adhesive.
Note that these additional features are not shown in FIGS.

6 and 7, the relationship between the number of valves 32 and the adhesive outlet orifice 71 is emphasized again.
This relationship affects the adjustability of the width in the shape of the adhesive application surface. The width in the shape of the adhesive application surface means the spread in the y direction on the adhesive application surface 4. If a large number of adhesive outlet orifices are assigned to a slightly limited number of valves, the resulting adhesive application surface width will be rough, i.e., low resolution. However, tests have shown that it is possible to advantageously produce at least one adhesive-applied surface for commercial use if it has five valves that are independently controlled.
In the coating head 60 shown in FIG. 6, a plurality of rows of valves VRi to n are arranged one after the other in the x direction in which the bag components are conveyed. In order to indicate a valve at a specific position in the valve row, the reference numerals i to n are added to the reference numerals of the valve 32 and the adhesive passages 72 and 73 assigned thereto.
In such an adhesive application device, since the full width B of the valve 32 becomes a problem, it is advantageous to arrange the valves 32 one by one in the y direction. This full width B is often larger than the required spacing of the adhesive sweep lines in a direction perpendicular to the direction in which the bag components are conveyed. In general, it is advantageous to assign a plurality of adhesive outlet orifices to each valve as shown in FIG. 7 (b). However, in such an embodiment of the present invention, several sweep lines will be interrupted when the valve is closed, so that when the width of the shape 4 of the adhesive application surface is to be freely configured, the resolution is Lower. If a single coating head 61 is provided with an extremely large number of valves 32, the sweep line of the adhesive approaching in the y direction can be applied, and at the same time, the contour of the adhesive application surface can be formed with extremely high resolution. This object can also be achieved by using valve trains that are shifted from each other in the y direction. In the case of a coating head provided with a plurality of valve rows VRi to VRn, the adhesive outlet orifices can be arranged in a row as shown in FIG. For this purpose, the vertical adhesive outlet passages 72 and 73 are guided in the x direction.

FIG. 7A described above shows the surface 76 of the coating head 70 on the side facing the components 1 and 2 of the bag. The coating head 70 is essentially composed of a valve mounting plate 75 and a valve 32 mounted thereon. As described above, the adhesive outlet orifices are arranged in a line in a direction orthogonal to the x direction in which the sealing paper 2 is conveyed. Accordingly, in the illustrated embodiment of the present invention, the bore holes 71 are provided at the same height in the x direction.
If the exit orifice 71 is formed at different heights in the x direction, the passage time difference must be taken into account in the control of the valve. When the adhesive outlet orifices are provided at different positions in the x direction, the time at which a bag component 1 and 2 passes through the orifices is different for each orifice, resulting in a passage time difference. This transit time difference is dependent on speed and is difficult to consider. Therefore, the configuration shown in FIG. 7A is extremely advantageous.

  FIG. 7B shows how the adhesive reaches the adhesive outlet orifice 71 from the valve 32. In FIG. 2, only the valves 32i included in the first valve row VRi are visible. However, in the embodiment of FIG. 7B, three rows of valves are provided, and the two bulb rows are hidden behind the drawing. In the present embodiment, four adhesive outlet orifices 71 are assigned to each of the valves 32i to 32iii. Each of the bracketed vertical lines 77i-77iii represents a group of three adjacent adhesive outlet orifices 71, each group being assigned to one of each of the three valve rows VRi-VRiii. The opening of the valve is located at the center in the y direction, that is, at the center of the width B of the valve. These valve openings are aligned with the upper adhesive outlet passage 72. In order to allow this type of arrangement, the valve trains VRi to VRiii are each offset from each other by a distance C in the y direction. In the illustrated configuration, the distance A between the adhesive outlet orifices 71 is much smaller than the valve width B. Therefore, first, a fine adhesive sweep line 3 can be applied at narrow intervals, and then it can be spread or crushed to easily obtain a flat application surface.

In an embodiment of the present invention, when the valve is selectively turned on / off to adjust the width of the adhesive application surface, as described above, between the two adjacent upper adhesive outlet passages 72. The resolution is determined by the distance C. Similarly, when the shape of the adhesive application surface is changed to the shape shown in FIG. 4 and FIGS. 9A to 9B other than the rectangular shape shown in FIG. The resolution of the shape of the adhesive application surface is determined by the distance C.
In this context, FIG. 7 (b) shows that the dimension D plus the distance A between the respective adhesive outlet orifices that are supplied with adhesive by one valve is important.
In the embodiment shown in FIG. 7B, as described above, since another valve row VRn is arranged behind, the dimension D can be clearly reduced compared with the valve width B (D < B / 3). This coefficient is important when the width and shape of the adhesive application surface are changed with a large resolution, since such a numerical value can be reduced to a necessary minimum. Therefore, the adhesive can be saved. This is possible without changing the mold parts 12 and 22 even with sufficient resolution.

FIGS. 8A to 8C are plan views of an embodiment of the coating head 80 that can move in the y direction with respect to the sealing paper 2. In this embodiment of the present invention, the possibility that the resolution and the width of the adhesive application surface can be changed further expands, and the flexibility in forming the contour 4 of the adhesive application surface in an arbitrary shape is increased. There is no need to replace it.
The movement of the coating head is performed based on the arrangement of the center lines o and p shown in the figure. The center lines o and p pass through the centers of the coating head 80 and the sealing paper 2, respectively. FIG. 8A shows a state in which both center lines are aligned. Other drawings show a state in which the coating head 80 is displaced relative to the sealing paper 2. Details of the displacement mechanism are not shown.

As described above, FIGS. 9A and 9B show the shapes of the adhesive application surfaces of the two sealing papers 2, 4a) U-shaped and 4b) rectangular. The shape of the U-shaped adhesive application is constituted by an adhesive sweep line 3 continuous from end to end and a short adhesive sweep line 45. The shape of the adhesive application in the rectangular shape 4b) is constituted by an adhesive sweep line 3 continuous from end to end and an adhesive sweep line 46 interrupted halfway. By selectively controlling the adhesive valve 32 during application of adhesive to the bag components 1 and 2, different types of adhesive sweep lines can be realized.
The figure does not show commonly used pumps or pressure vessels for transporting the adhesive or for applying or maintaining the pressure required for extrusion. All of the above-described and claimed embodiments of the present invention are indirect to the bag component such that the adhesive is first applied to a roller or the like and then transferred to the bag component. The same can be applied to the application of typical adhesives.

  FIG. 10 shows another side view of the nozzle applicator 114 used in, for example, a bag manufacturing apparatus. A liquid adhesive is supplied to the nozzle 103 of the nozzle applicator by an adhesive supply source 101 that receives an inflow 111 of the adhesive. The nozzle applicator receives electric power and a control signal via the control wiring 102 and the connector 112.

FIG. 11 shows another top view of this device.
FIG. 12 shows another cross-sectional view of the template device 119 along the line AA. A template apparatus 119 according to this embodiment includes a base plate 104, a sandwich plate 105, and a pin plate 106. When the valve 103 is opened, the pressurized adhesive is pushed into the inlet 116. FIG. 13 shows the entire passage system 115 formed by pin plates. The passage system may include a plurality of passages 115. The main purpose of such a passage system is to distribute the adhesive to a plurality of outlet orifices. Since the gap between the exit orifices is small compared to the width of the valve, this distribution is important. Moreover, since the cost of the valve is high, it is valid to use such a passage system. Therefore, it is possible to supply adhesive to a plurality of passages from one valve. The passage then distributes the adhesive to the plurality of outlet orifices. In the illustrated embodiment, adhesive is delivered from the passage 115 to the exit orifice 113. Next, the adhesive discharged from the exit orifice 113 is applied to the paper or foil material 107, at which time the material 107 passes through the stencil device 119 in the direction of arrow 121 so that an adhesive sweep line 108 is formed. Is done. In the illustrated embodiment, the exit orifice 113 is sealable by a pin 120. These pins are rotatably attached to the pin plate 106, and the axial direction thereof is fixed by a safety device 118. The pin 120 passes through the outlet orifice 113. At the height of the outlet orifice 113, the pin is provided with an adhesive outlet orifice 117. By appropriately adjusting the bore hole, the adhesive can pass through and the adhesive is applied to the material 107. FIG. 12 shows a state where the application of the adhesive has just been completed. For this purpose, with the help of a groove (not shown) provided in the head of the pin, the pin 120 is rotated 90 ° like a screw so that the axis of the adhesive outlet orifice 117 stands upright with respect to the drawing sheet. The opening 117 is made visible.

  FIG. 13 shows a top view in a state where the pin plate 104 is detached from the remaining template device 119. You will understand the direction of the adhesive flowing through this plate. The passage 115 and the exit orifice are clearly shown.

x: direction in which the sealing paper is conveyed y: direction orthogonal to the conveying direction of the sealing paper (horizontal direction)
z: Direction perpendicular to the conveying direction of the sealing paper (vertical direction)
W: direction in which the bottom 1 of the bag is conveyed 1 ... bottom of the bag 2 ... sealing paper 3 ... sweep line of adhesive 4 ... rectangular adhesive application surface 4a) ... U-shaped adhesive application surface 4b) ... rectangular Frame-like adhesive application surface 10 ... Adhesive application device for sealing paper according to the prior art 11 ... Adhesive cylinder 12 ... Mold parts or relief plates 13 ... Plate cylinder 14 ... Gripping cylinder 15 ... Rotation direction of the gripping cylinder 16 ... Plate Rotating direction of cylinder 17 ... Rotating direction of adhesive cylinder 18 ... Broken line 19 ... Bag 20 ... Adhesive applicator for the bottom of the bag according to the prior art 21 ... Adhesive reservoir 22 ... Mold part or letterpress 23 ... Plate cylinder 24 ... Gap between rollers 25 ... Axis of cylinder 26 ... Dotted line indicating bag conveyance path 27 ... Rotation direction of cylinder 28 ... Adhesive transfer cylinder 29 ... Pressing cylinder 30 ... Adhesive applicator 31 according to the present invention 31 ... Coating head And / or coating plate 32... Valve 32 n... N-th valve in valve train 33. Adhesive supply tube 40. Adhesive coating device 41 according to the present invention 41. Tube 44 ... Adhesive sweep line interrupted at regular intervals 45 ... Short adhesive sweep line 46 ... Interrupted adhesive sweep line 47 ... Continuous adhesive sweep line from end to end 48 ... Seal without application of adhesive Paper 50 ... Application head 52 ... Y-direction (horizontal) adhesive passage in application head 53 ... Y-direction (horizontal) adhesive passage in application head 55 ... Z-direction (vertical) adhesive passage in application head 56 ... Installation Plate 60... Application head having valves in n rows 61... Valve mounting plate VRi... First valve row VRii... Second valve row VRn. The second valve row 66 ... the side of the valve mounting plate opposite to the bag component 70 ... the coating head 71 ... the adhesive outlet orifice 72 ... the upper adhesive outlet passage 73 ... the lower adhesive outlet passage 75 ... the valve mounting plate 76 ... Side of the valve mounting plate facing the bag components 77i ... First group adhesive outlet orifice 77ii ... Second group adhesive outlet orifice 77iii ... Third group adhesive outlet orifice A ... Two adhesive outlet orifices Distance in the y direction between 71 B: Width in the y direction of the valve 32 C: Distance in the y direction between two adjacent upper adhesive outlet orifices D: Between the adhesive outlet orifices 71 supplied with adhesive from one valve 80 ... Coating head according to the embodiment o ... Center line of coating head 80 p ... Inside sealing paper 2 Line y: direction orthogonal to the conveying direction of the components of the bag 101: adhesive supply source 102 ... electric control wiring 103 ... electromagnetic valve 104 ... base plate 105 ... sandwich plate 106 ... pin plate 107 ... paper or foil 108 ... Adhesive (starch, etc.)
DESCRIPTION OF SYMBOLS 110 ... Pin head 111 ... Adhesive inflow 112 ... Connector 113 ... Outlet orifice 114 ... Seal 115 ... Passage 116 ... Inflow 117 ... Adhesive supply bore hole 118 ... Pin safety device (retainer)
119 ... Template apparatus 120 ... Pin 121 ... Direction in which material 107 is conveyed

Claims (37)

An apparatus for sealing the bottom of a folded and crossed paper bag (1), wherein the apparatus is formed with a folded and crossed bottom on the paper bag (1),
This bottom is realized by folding the end of the tubular part from which the bag (1) is manufactured,
By means of an adhesive application device (10, 20, 30, 40) on the folded bottom (1) which is the end of this tubular part and / or on the sealing paper (2) which is bonded to the bottom (1) Apply the adhesive layer,
The bottom (1) folded and the sealing paper (2) are brought into contact and bonded,
In such a device,
At least one adhesive applicator (10, 20, 30, 40),
The adhesive applicator comprises at least one adhesive reservoir (21) or at least one adhesive conduit (33, 52, 53), in which the adhesive has a pressure higher than atmospheric pressure. Added,
At least one adhesive reservoir (21) or at least one adhesive conduit (33, 52, 53, 55, 72, 73) comprises at least one adhesive outlet orifice (71) through which the adhesive passes. Is applied directly to the sealing paper (2) and / or the folded bottom (1),
A sealing device for the bottom of the bag. In the device,
In a non-contact state, at least one adhesive outlet orifice (71) or other component in the device for sealing the bottom of the bag and the sealing paper (2) and / or the folded bottom (1), The adhesive is applied,
The sealing device of the bottom part of the bag of Claim 1 characterized by the above-mentioned. In the device,
The adhesive conduit (33, 52, 53, 55, 72, 73) for supplying adhesive to the adhesive outlet orifice (71) comprises at least one valve (32).
The sealing device of the bottom part of the bag of Claim 1 or 2 characterized by the above-mentioned. In the device,
The adhesive application device (10, 20, 30, 40, 50, 60, 70) includes an application head (31, 41, 50, 60, 80),
The adhesive applicator comprises a portion of at least one adhesive reservoir (21) or at least one adhesive conduit (33, 52, 53, 55, 72, 73),
4. The sealing device for the bottom of a bag according to claim 1, characterized in that at least one adhesive outlet orifice (71) is assigned to them. 5. In the device,
The application head (31, 41, 50, 60, 80) includes a plurality of adhesive outlet orifices (71).
The sealing device of the bottom part of the bag of Claim 4 characterized by the above-mentioned. In the device,
The coating head (31, 41, 50, 60, 80) has a flat form (61),
An adhesive outlet orifice (71) is provided on the side (76) facing the bag component to which the adhesive is applied,
The sealing device of the bottom part of the bag of Claim 5 characterized by the above-mentioned. In the device,
The application head (31, 41, 50, 60, 80) is provided with a valve (32).
The sealing device for a bottom portion of a bag according to any one of claims 4 to 6, wherein In the device,
A valve (32) is provided on the opposite side (66) of the application head (31, 41, 50, 60, 80) to the side facing the component of the bag to which the adhesive is applied,
The sealing device of the bottom part of the bag of Claim 7 characterized by the above-mentioned. In the device,
The distance (A) between each of the at least one adhesive outlet orifice (71) portions arranged in the direction (y) perpendicular to the conveying direction is compared to the width (B) of the valve (32). Small dimensions,
The sealing device of the bottom part of the bag of Claim 7 or 8 characterized by the above-mentioned. In the device,
The application head (31, 41, 50, 60, 80) is provided with a larger number of adhesive outlet orifices (71) than the valve (32).
The sealing device for a bottom portion of a bag according to any one of claims 7 to 9, wherein In the device,
The adhesive outlet orifice (71) provided in the application head (31, 41, 50, 60, 80) is substantially in the direction in which the component (1, 2) of the bag to which the adhesive is applied is conveyed. Are arranged in a line in a perpendicular direction (y),
The sealing device for the bottom of a bag according to any one of claims 5 to 10, wherein In the device,
An adhesive is supplied to the valve (32) through at least one bore hole or chamber (52, 53) provided inside the coating head (31, 41, 50, 60, 80).
The sealing device for a bottom of a bag according to any one of claims 5 to 11, wherein In the device,
At least one bore hole or chamber (52, 53) is arranged in a direction substantially perpendicular to the direction (x) in which the bag components (1, 2) are conveyed,
The sealing device of the bottom part of the bag of Claim 12 characterized by the above-mentioned. In the device,
At least a part of the valve (32) provided in the coating head (31) is arranged shifted in the direction (x) in which the bag components (1, 2) are conveyed,
The sealing device for a bottom portion of a bag according to any one of claims 7 to 13, In the device,
The valves (32) are arranged in separate rows (VR1, VRn) which are orthogonal to the direction (x) in which the bag components (1, 2) are transported. Arranged in (y),
The sealing device of the bottom part of the bag of Claim 14 characterized by the above-mentioned. In the device,
The application heads (31, 41, 50, 60, 80) are movable in a direction (y) orthogonal to the direction in which the component (1, 2) of the bag to which the adhesive is applied is conveyed. Yes,
The sealing device of the bottom part of the bag as described in any one of Claims 4-15 characterized by the above-mentioned. In the device,
The application head (31, 41, 50, 60, 80) can move to shake the head from the posture when applying the adhesive.
The sealing device of the bottom part of the bag as described in any one of Claims 4-16 characterized by the above-mentioned. In the device,
The rotatable application head (31, 41, 50, 60, 80) can maintain a stationary posture in order to provide various functions.
The sealing device of the bottom part of the bag of Claim 17 characterized by the above-mentioned. In the device,
At least two stationary postures of the application head (31, 41, 50, 60, 80)
The posture for applying the adhesive to the component (1, 2) of the bag to which the adhesive is to be applied,
An attitude for sealing the adhesive outlet orifice (71),
A posture for wiping off the adhesive that contaminates the application head (31);
A posture for cleaning the application head (31),
It is an attitude for providing at least two functions of the above.
The sealing device of the bottom part of the bag of Claim 18 characterized by the above-mentioned. In the device,
The distance between the adhesive outlet orifices (71) can be freely selected during the application of the adhesive to the bag components (1,2) to which the adhesive is to be applied,
The sealing device of the bottom part of the bag as described in any one of Claims 4-19 characterized by the above-mentioned. In the device,
At least one adhesive conduit (33, 52, 53, 55, 72, 73) or at least one adhesive reservoir (21) is coupled to the water line;
21. The sealing device for a bottom portion of a bag according to any one of claims 1 to 20, wherein: In the device,
The water pipe has a check valve,
The sealing device of the bottom part of the bag of Claim 21 characterized by the above-mentioned. In the device,
At least one adhesive conduit (33, 52, 53, 55, 72, 73) or at least one adhesive reservoir (21),
・ Pressure control valve,
・ Pressure sensor,
・ Pressure controller,
At least one of the above,
The sealing device for a bottom portion of a bag according to any one of claims 1 to 22, In the device,
The application head (31) includes a protrusion on the side (76) facing the component (1, 2) of the bag to which the adhesive is to be applied,
This protrusion is closer to the bag components (1, 2) to which the adhesive is to be applied, compared to the adhesive outlet orifice (71) during application of the adhesive,
The sealing device for the bottom of a bag according to any one of claims 1 to 23. In the device,
An adhesive and / or water is supplied to the application head (31) via a flexible pipe.
The sealing device for the bottom of a bag according to any one of claims 4 to 24, wherein: In the device,
At least one valve (32) supplying adhesive to at least one adhesive outlet orifice (71) is controlled independently of another valve (32);
An adhesive sweep line (3) applied by at least one adhesive outlet orifice (71) can be selectively started and stopped;
The sealing device for the bottom of a bag according to any one of claims 3 to 24, wherein: In the device,
While the adhesive is being applied to the component (1, 2) of the bag to which the adhesive is to be applied, at least one valve (32) can be opened and closed.
The sealing device of the bottom part of the bag of Claim 26 characterized by the above-mentioned. The apparatus comprises at least five valves (32),
The sealing device for a bottom portion of a bag according to any one of claims 3 to 27, wherein: In the device, for an adhesive outlet orifice that is supplied with adhesive by a valve, between these orifices in a direction (y) perpendicular to the direction (x) in which the bag components to be applied are conveyed The sum (D) obtained by adding the distance (A) is smaller than the width (B) of the valve (32).
The sealing device of the bottom part of the bag of Claim 9 or 10 characterized by the above-mentioned. In the device,
The adhesive conduits (52, 53) supplying adhesive to the plurality of valves (32) have a common cross-sectional area, the size of which is determined by the adhesive outlet orifice (71). It is larger than half the sum of the cross-sectional areas,
30. The sealing device for the bottom of a bag according to any one of claims 1 to 29. In the device,
Hard support means, preferably consisting of a metal cylinder, are provided, and the bag components (1, 2) to which the adhesive is to be applied are supported by the support means during the application of the adhesive,
The sealing device of the bottom part of the bag as described in any one of Claims 1-30 characterized by the above-mentioned. In the device,
A stopper is provided to seal the adhesive conduit (72, 73, 77, 115) and / or the adhesive outlet orifice (71, 119) in the direction in which the adhesive is supplied to the valve.
32. The sealing device for a bottom portion of a bag according to any one of claims 3 to 31, wherein: In the device,
The sealability of the adhesive conduit (72, 73, 77, 115) and / or the adhesive outlet orifice (71, 113) is ensured by pins (120) and / or screws,
33. The sealing device for a bottom portion of a bag according to any one of claims 1 to 32. In the device,
In the mold part device (119), the conduit (115) and / or the adhesive outlet orifice is sealed by a rotatably held pin (120),
The pin (120) has an adhesive outlet that seals the conduit (115) and / or the outlet orifice (113) when the pin (120) rotates.
The sealing device for a bottom portion of a bag according to any one of claims 1 to 33, wherein: In the device,
A pin (120) or screw is inserted into at least a portion of the outlet orifice (113),
The principal axis of inertia of the pin (120) or screw coincides with the axis of the exit orifice (113),
The sealing device of the bottom part of the bag of Claim 33 characterized by the above-mentioned. A method for sealing the bottom of a bag, the method comprising:
At least one valve (32),
While forming the shape (4) of the adhesive application surface,
The valve is opened and closed at a time point different from that of the other valve (32) while applying the adhesive to the bag components (1, 2).
36. A method for operating an apparatus according to any one of claims 3 to 35. In said method,
The length of time between opening and closing the valve (32) is less than 5 milliseconds,
38. The method of claim 36.

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