JPH06344647A - Wrapper sealing device - Google Patents

Abstract

PURPOSE:To obtain a wrapper sealing device capable of automatically sealing a wrapper at the required position thereof and discharging it only by successively inserting wrappers of various sizes as objects to be printed. CONSTITUTION:The device is provided with a transport means transporting an inserted object to be printed W to a sealing position and discharging the printed object W to the external; a printing block 4 sealing an object to be printed W by a lifting/lowering printing head 29 disposed on a transport path of the object to be printed W and generating a sealing completion signal after sealing; and a printing block moving means moving the printing block 4 crosswise, i.e., in the transport direction of an object to be printed W, and longitudinally, i.e., in the orthogonal direction thereto, for adjusting a sealing position on the object to be printed W. Furthermore, a position detection sensor 42 is provided for making a position detection signal by detecting the leading end of an inserted object to be printed W just before a discharge side, and a control circuit part is provided for controlling the drive of the transport means and the printing block 4 on the basis of the sealing completion signal and the position detection signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a packaging material made of a plastic sheet such as a vinyl bag cut into a rectangular shape of an arbitrary size as an object to be printed. The present invention relates to a marking device for a packaging material used for printing the date, expiration date, and the like.

[0002]

2. Description of the Related Art A conventional marking device of this type has a packaging material, which is an object to be printed, on a marking receiving base provided immediately below a printing block which is fixedly arranged in a fixed position and is moved up and down. There is a manual type in which each sheet is placed one by one by hand, and after the marking is completed, it is repeatedly taken out by hand. In addition, as the second, a printing block is fixedly arranged so as to be able to move up and down at a proper position on a conveying path of a belt conveyor of a constant length by intermittent driving for conveying an object to be printed, and the blocks are aligned and placed on the belt conveyor at predetermined intervals. There is also a continuous type in which the above-mentioned printing block sequentially prints on the printing object while synchronizing with the belt conveyor. Further, as No. 3, a printing block is fixedly arranged so as to be able to move up and down at a proper position on a conveying path of a belt conveyor of a certain length by a continuous drive for conveying an object to be printed, and a large number of objects to be printed are stacked. There is a continuous type in which it is sent to the belt conveyor one by one, conveyed to the marking position and temporarily stopped, and the object to be printed is marked in the printing block, and then the belt conveyor is re-driven to sequentially discharge. .

[0003]

However, the first marking device according to the prior art has an advantage that the structure of the device is simple, but the work efficiency is not good and it is difficult to accurately position the marking. There were challenges. In addition, the second marking device has the advantage that the work efficiency is good because the marking process for a large number of objects to be printed is automatically performed without requiring human labor, but a long belt conveyor is required and a large floor area must be secured. In addition to the above, there is a problem that if the accuracy of the means for arranging and placing the objects to be printed aligned at a predetermined interval is not good, the marking position may be misaligned and the work efficiency may be reduced for long objects to be printed. Furthermore, in the third marking device,
There is an advantage that the work efficiency is good because the marking process for a large number of objects to be printed is automatically performed without requiring human labor.
When the stacked printed materials are sent one by one onto the belt conveyor, it cannot be accurately sent due to the generation of static electricity, or static electricity is generated with the belt conveyor, making it impossible to accurately convey and discharge them. There was a problem. Therefore, an object of the present invention is to provide a packaging material marking device that can solve the problems of these conventional techniques.

[0004]

In order to achieve this object, in a packaging material marking apparatus according to the present invention, an inserted object to be printed is conveyed to a marking position and the object to be printed after printing is discharged to the outside. Conveying means, a printing block which is arranged on a conveying path of an object to be printed, and which prints on the object to be printed by a vertically moving operation and generates a marking end signal after the marking, and a conveying direction of the object to be printed. Print block moving means for adjusting the marking position on the printing object by moving the printing block in the front-back direction and the left-right direction orthogonal to each other and the position by detecting the leading edge of the printing object sent immediately before the discharge side. A position detection sensor that generates a detection signal, and a control circuit unit that drives and controls the conveying unit and the printing block based on the marking end signal and the position detection signal are provided.

Further, in the packaging material marking device according to the present invention,
The transport means includes a variable-length transport base configured in the form of a sheet made of cloth, and the variable-length transport base moves the print block in the front-back direction by the print block moving means,
At least the length between the marking positions from the insertion side of the printing object is variable.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a first embodiment of a packaging material marking device according to the present invention, and FIG. 2 shows a schematic configuration diagram of the marking device as seen from the side. As shown in these figures, the insertion roll 3 is rotatably supported between the left and right bearing members 1 and 2 provided adjacent to the mounting table 45 for sending out the print object W, and the passage through which the print object W is conveyed. Print block 4 on top
Has been deployed. Imprint receiving plate 5 is provided immediately below this printing block 4, and immediately before imprint receiving plate 5, an intermediate roll 7 whose both ends are rotatably supported by bearing members 6 and 6 is provided. Between the insertion roll 3 and the intermediate roll 7, a variable-length transport base 8 made of, for example, a cloth sheet is erected endlessly as a transport means. A tension roll 11 is inserted through the inside of the variable-length carrier 8, and both ends of the tension roll 11 are rotatably supported by tension arms 10, and the tension arms 10 are attached clockwise by springs 9. By urging, a constant tension is always applied to the variable length carrier 8. The tension roll 11, the tension arm 10 and the spring 9 constitute tension adjusting means for the variable length carrier 8. The rotation driving force of the insertion motor 13 is transmitted to the insertion roll 3 through the transmission belt 14,
As a result, the variable length carrier 8 is rotationally driven, and is rotatably installed on the insertion roll 3 between the bearing members 1 and 2 so as to come into contact with the upper surface of the variable length carrier 8 and slide and rotate. An insertion driven roll 12 is provided. A weight 15 rotatably supported by a rod 17 extending from a bearing member 16 is mounted on the central portion of the upper surface of the variable-length transport table 8, and the bearing member 16 moves in the front-back direction which is the transport direction. It is configured to be able to. As a result, when the insertion motor 13 is energized, the insertion roll 3 is rotationally driven, the belt driven roll 7 and the insertion driven roll 12 are rotated via the variable length conveyance base 8, and the variable length conveyance base 8 is conveyed in the direction of the arrow. Drive to. Therefore, when the print object W is placed on the mounting table 45 and pushed out, the print object W is drawn between the insertion roll 3 and the insertion driven roll 12 and then moved forward along the upper surface of the variable-length transport table 8. Then, in the middle of the process, the weight 15 is pressed against the upper surface of the belt by its own weight, and the belt 15 is fed to the stamp position side while being prevented from being deformed.

Support pillars 18 (one of which is not shown) are integrally provided upright on both sides of the stamp receiving plate 5, respectively.
A linear bearing 19 arranged horizontally in a direction orthogonal to the conveying path is attached to the upper part of the support column 18, and fitted in the linear bearing 19 so as to be movable in the left-right direction on the variable length conveying table 8. A guide bar 20 is attached, and a print block 4 whose details will be described later is attached to the guide bar 20. A linear bearing 22 is attached to the lower part of the support column 18, and the linear bearing 22 is horizontally arranged along both sides of the variable length carrier 8 in a direction parallel to the carrier passage. Is fitted, and a feed screw rod 23 having a handle 24 attached to one end is screwed to the lower end thereof. As a result, when the handle 24 is rotated to rotate the feed screw rod 23, the support column 18 and the linear bearing 19 are moved along the guide bar 21 in the front-back direction of the variable-length carrier 8, so that they are attached to the guide bar 20. By moving the printing block 4 as desired, the marking position in the front-rear direction with respect to the printing object W can be arbitrarily set. Further, when the print block 4 or the guide bar 20 is gripped and manually moved horizontally as desired, the marking position in the left-right direction with respect to the print target W can be set. Although not shown, a lock screw is provided between the linear bearing 19 and the guide bar 20 so that the linear bearing 19 and the guide bar 20 are held at the set marking position in the left-right direction. These guide bars 2
0, 21, the linear bearings 19, 22 and the feed screw rod 23 constitute a print block moving means. However, this printing block moving means is not limited to the above-mentioned embodiment, and for example, the moving means for setting the marking position in the left-right direction may be constituted by a feed screw like the moving means in the front-back direction, The moving means may be replaced with an electric feed screw or other known horizontal moving means as appropriate. In addition, when the printing block 4 is moved in the front-back direction in order to set the marking position according to the length and width of the print object W, the interval between the insertion roll 3 and the intermediate roll 7 is changed and the variable length is changed. The length of the carrier table 8 can be arbitrarily changed. At that time, a constant tension is always applied to the variable length carrier table 8 by the action of the tension adjusting means such as the tension roll 11 to cause slack. Absent.

The printing block 4 is mounted on a mounting plate 25 fixed to the front surface of the guide bar 20, and is a foil type which is stamped by a print head via an ink ribbon made of a tape-shaped foil carrying inks. It is composed of a stamping machine. A print driving motor 26 is attached to the back surface of the mounting plate 25.
The output shaft 26a of No. 6 is connected to the reel shaft 31a of the take-up reel 31 on the rear surface side of the mounting plate 25 through a gap box, and the tip end side of the output shaft 26a provided on the front surface of the mounting plate 25. Is attached to the eccentric cam plate 27. One end of a swing rod 28 is pivotally attached to the eccentric cam plate 27 at the eccentric position.
The other end side is pivotally attached to a pressing member 30 whose left-right direction is restricted by a guide member (not shown). This pressing member 3
A print head 29 loaded with a letter T is arranged immediately below 0, and the pressing member 30 and the print head 29 are elastically connected via a spring member (not shown). Further, a reel shaft 32a, into which the feeding reel 32 is inserted, is rotatably attached to the mounting plate 25.
An ink ribbon R is wound between the winding reel 2 and the take-up reel 31 so as to pass under the print head 29. Further, a limit switch L is attached to the mounting plate 25 adjacent to the swing rod 28, and the operating rod of the limit switch L comes into contact with and separates from the swing rod 28, so that the details will be described later. The start and end of the marking are detected. In the print block 4 configured as described above, when the take-up reel 31 is rotated in association with the rotation of the print driving motor 26, the ink ribbon R starts running and the eccentric cam plate 27 is rotated. The pressing member 30 is moved downward via the swing rod 28, and the downward movement of the pressing member 30 strikes the print head 29. This allows
When the letter T is printed on the object to be printed W at the position of the pressure receiving plate 5 via the ink ribbon R, and when the swing rod 28 is subsequently moved upward, the limit switch L is actuated again and the print drive motor is driven. The rotation of 26 is stopped.

A discharge plate 33 that guides the passage of the object W to be printed is provided integrally with the stamp receiving plate 5 at the front of the printing position where the printing block 4 is arranged, and at the rearmost portion of the discharge plate 33. Is provided with a discharge roll 36 which is rotationally driven by a discharge motor 34 via a transmission belt 35, and a discharge driven roll 41 which contacts the upper surface of the discharge roll 36. A cam plate 37 is fixed to the output shaft of the discharge motor 34, and one end of a swinging arm 38 having a dogleg shape whose center is pivotally supported is engaged with a notch 37a of the cam plate 37. The other end of the swing arm 38 is engaged with the pressure roll 40 mounted on the rotation shaft of the discharge driven roll 41, and the other end of the swing arm 38 supports the pressure roll 40 by the spring 39. I am playing. The swing arm 38 supported by the spring 39 presses the discharge follower roll 41 against the upper surface of the discharge roll 36 via the pressing roll 40. However, when the motor 34 starts rotating for a while, the cutout portion of the cam plate 37 is formed. When one end of the swing arm 38 rises from 37a to the outer peripheral surface, the other end of the swing arm 38 swings in the direction away from the pressing roll 40 against the biasing force of the spring 39, so that the discharge roll 36 Is released from the pressure contact of the discharge driven roll 41 with respect to. As a result, when the discharge motor 34 is started in order to discharge the print object W whose leading edge is clamped between the rolls 36 and 41 on the discharge side, a large pressure contact holding force is applied at the time of starting and a small pressure contact holding force thereafter. Then, the discharge-side rolls 36 and 41 discharge the print target W. Therefore, even when the object W to be printed is in a state of being electrostatically adsorbed between the object W to be transferred and the variable length carrier 8 or the discharge plate 33, the object W to be printed can be easily and reliably discharged.
Further, on the front side of the discharge roll 36, for example, an optical sensor or the like is used to detect the passage of the print object W.
2 is provided, and the detection signal of the position detection sensor 42 is taken into the control circuit section 44, and the control accompanying the inserting and discharging operation of the print object W and the marking operation is performed.

The operation of the marking device of the first embodiment having the above construction will be described with reference to FIGS. 3 and 4. First, in order to set the marking positions in the length direction and the width direction with respect to the print object W, the print block 4 is moved in the left-right direction and the front-rear direction to position the print block 4. Next, when the main power source is turned on to start the device, both the insertion motor 13 and the ejection motor 34 are rotationally driven by the control of the control circuit unit 44, and as shown in FIG. , 12 and the rolls 36 and 41 on the discharge side and the variable length transport table 8 are rotationally driven (timing t1). Then, when the print object W is inserted between the rolls 3 and 12 on the insertion side (timing t2), the print object W is shown in FIG. The printing block 4 has the leading edge thereof.
When the mark reaches the position detection sensor 42 after passing through the marking position where the mark is provided, the position detection sensor 42 that detects the passage of the leading edge outputs a position detection signal. Upon receiving this position detection signal, the control circuit unit 44 stops the driving rotation of the insertion motor 13 (timing t3), activates the short-time timer of the control circuit unit 44, and after a preset timer time T1 elapses. The driving rotation of the discharge motor 34 is also stopped (timing t4), and at the same time, the print driving motor 26 is stopped.
Is controlled to rotate. As a result, FIG.
As shown in (c) to (d), the printing material W is stopped in a state where at least the leading edge is held between the discharge-side rolls 36 and 41, and the printing material W descends with respect to the printing material W. The print head 29 stamps the date of manufacture. In particular, when the print block 4 is adjusted in the front-back direction to set the position in the length direction, the length of the variable length carrier 8 is arbitrarily changed so that the rolls 3 and 12 on the insertion side print the print block 4.
The distances to the position detection sensor 42 and the position detection sensor 42 are variable, but by adjusting the distance from the insertion side rolls 3 and 12 to the position detection sensor 42 to be substantially equal to the length dimension of the shortest object W to be printed, Depending on the length of the print object W, at least the leading edge or more is held between the discharge-side rolls 36 and 41. Further, the timer time T1 between the timings t3 and t4 set by the short time timer of the control circuit unit 44 is the position detection sensor 42.
In the print head, the print head W is discharged to the front of the discharge side rollers 36 and 41 after the passage of the leading edge of the print target W is detected and before the discharge motor 34 is stopped. Whether the desired marking position is directly below 29,
Set based on the transport speed. After the marking is completed, the limit switch L outputs a marking end signal (timing t
5) Then, the control circuit unit 4 which has received the marking end signal
4, the print driving motor 26 is stopped, and at the same time as shown in FIG.
As shown in (e), the discharge motor 34 is re-driven to discharge the printed object W to the outside, and a short-time timer of the control circuit unit 44 (for example, about 0.1 to 0.2 seconds). ) Is operated to allow the insertion motor 13 to be re-driven (timing t6) after the timer time T2 has elapsed. In this state, when a new print object W is inserted into the rolls 3 and 12 on the insertion side, the position detection sensor 42, which is once turned off by the discharge of the stamped print object W, detects that the new print object W It is turned on again by the insertion (timing t7),
After that, the same operation as above is repeated.

Next, a marking device according to a second embodiment of the present invention will be described with reference to FIGS. As shown in these figures, an insertion roll 3 that is rotatably driven by the insertion motor 13 via a transmission belt 46 is provided in front of the mounting table 45 that sends out the print object W. Between the bearing members 47, 47 fixed on both sides of the main body of the apparatus, the arms 4 are respectively provided.
8 and 48 are pivotally mounted, and an insertion driven roll 12 that is slidably rotated by contacting the upper surface of the insertion roll 3 by its own weight is mounted on a rotary shaft 49 that is erected on the arms 48 and 48. The printing block 4 has a linear bearing 5 via a mounting plate 25.
The linear bearing 53 is fixed integrally with 3, and is mounted so as to be movable in the left-right direction along a guide bar 52 provided above the left and right support columns 50, 51. A feed piece 54 is provided below the support pillar 50 on one side.
Is slidably mounted on one side guide bar 56 horizontally installed in the front-rear direction, and a feed screw rod 59 having a handle 60 attached to one end is screwed in the front-rear direction to the feed piece 54. ing. A roller 57 is provided below the support pillar 51 on the other side, and the roller 57 is rotatably mounted on a guide bar 58 on the other side that is horizontally installed in the front-rear direction. As a result, in order to adjust the marking position on the printing object W, the feed screw rod 59 is operated by operating the handle 60.
When is turned, the entire print block 4 including the support columns 50 and 51 can be moved along the front-rear direction which is the conveyance direction of the print object W, so that the position of the print object W can be adjusted in the longitudinal direction. The position of the print target W in the width direction can be adjusted by moving the print block 4 in the left-right direction along the guide bar 52 via the linear bearing 53. These, the guide bar 52, the linear bearing 53, and the guide bar 5
6, 58, feed screw rod 59, feed piece 54, and roller 5
The printing block moving means is composed of 7 or the like. The print block 4 has the same structure as that of the first embodiment, and the print head 29 prints the object W to be printed on the stamp receiving plate 61.

Conveyor rolls 62, 63, 64 are provided below the conveyance path for the print object W, and each of these conveyor rolls is made of, for example, cloth to guide the passage of the print object W. A variable-length transport base 66 made of sheets is stretched. One end of the variable-length carriage 66 is attached to the upper surface of the discharge plate 33 via the rear-side conveyor roll 65, and the other end is unidirectionally rotated by a conveyor roll to provide a tension means. It is mounted in such a manner that it is wound around the eggplant winding roll 67. Further, the conveyor roll 63 in the middle part is provided on the side of the stamp receiving plate 61 with the conveyor roll 6
5 are attached to the discharge plate 33 side, respectively. As a result, when the printing block 4 is moved in the front-rear direction, the conveyor roll 63 is moved together with the imprint receiving plate 61, and the variable-length transport table 66 is fed or wound from the winding roll 67. The length from 3, 12 to the print block 4 can be arbitrarily changed, and the variable-length transport table 66 can be always stretched to a constant tension between the conveyor rolls.

A discharge roll 36 is provided on the discharge plate 33 side, and the discharge roll 41 is pivotally attached to the upper portion between the left and right support columns 68 and 69 connected by a connecting plate 73, and the discharge motor 34 is provided. Is rotationally driven via the transmission belt 70. Further, the arm 7 is provided between the left and right support columns 68 and 69.
0, 71 are pivotally mounted, and the discharge driven rolls 36, 36 attached to the arms 70, 71 are the discharge rolls 3.
It is mounted so as to come into contact with the upper surface of 6 by its own weight and slide and rotate. A roller 72 is attached to a lower portion of the support pillar 68 on one side, the roller 72 is rotatably mounted on the guide bar 56 on the one side, and is connected to a lower portion of the support pillar 69 on the other side. A feed piece 73a is attached integrally with the plate 73. The feed piece 73a is slidably mounted on a guide bar 58 that is horizontally installed in the front-rear direction, and a feed screw rod 74 having a handle 75 attached to one end is screwed in the front-rear direction on the feed piece 73a. I am fit. Further, a position detection sensor 42 such as an optical sensor for detecting passage of the print object W is provided immediately before the discharge roll 36, and a control circuit similar to that of the first embodiment is omitted although not shown. The department is equipped. These connecting plates 73,
The feed piece 73a, the guide bars 68 and 69, the feed screw rod 74 and the like constitute a discharge roll movement adjusting means.

As a result, when the feed screw rod 74 is rotated by operating the handle 75 in order to adjust the holding position of the discharge side rolls 36 and 41 with respect to the leading edge of the object to be printed W,
Since the entire discharge side roll including the support columns 68 and 69 can be moved along the front-rear direction which is the conveyance direction of the print target W,
The distance between the insertion side rolls 3 and 41 and the discharge side rolls 36 and 41 is arbitrarily changed according to the length of the print object W,
Regardless of the length of the print object W, it can be adjusted so that the leading edge of the inserted print object W is always stopped at a position where it is held by the discharge-side rolls 36 and 41. In addition, even when the holding position by the rolls 36 and 41 on the discharge side is adjusted,
The variable length carrier table 66 can be kept in a state of being constantly stretched to a constant tension by the take-up roll 67 forming the tension means.

The operation of the marking apparatus of the second embodiment having the above-mentioned structure is basically the same as that of the first embodiment, so the detailed description will be omitted and only the differences will be described. In the marking apparatus according to the first embodiment, the discharge side rolls 36 and 41 are moved and adjusted together with the print head 4, and the distance between the print head 4 and the discharge side rolls 36 and 41 is always constant. On the other hand, in the marking apparatus according to the second embodiment, the discharge side rolls 36 and 41 and the print head 4 are individually moved and adjusted, and the distance between the print head 4 and the discharge side rolls 36 and 41 is arbitrarily set. It can be changed. Therefore, in the marking device of the first embodiment, the position detection sensor 42 is used to print the object W to be printed.
Even after the leading edge is detected, the discharge motor 34 is continuously driven for a predetermined time T1 according to the length of the print object W by the timer, and the leading edge is projected from the discharge side rolls 36 and 41. By stopping the object W to be printed,
The imprinting position of the print head 4 was set so that it could be adapted to the print object W of various lengths. On the other hand, in the marking apparatus according to the second embodiment, the driving of the discharging motor 34 is stopped immediately when the position detection sensor 42 detects the leading edge of the print object W, and the leading edge is always discharged. According to the length of the print-receiving material W, the discharge-side roll 3 is arranged so that the print-receiving material W is stopped at the position where it is nipped by the rolls 36 and 41 on the side.
By setting the positions of 6, 41 in advance and further setting the imprinting position of the print head 4, it is possible to adapt to the print object W of various lengths.

[0016]

As is apparent from the embodiments described above, the following effects can be expected in the packaging material marking apparatus according to the present invention. By simply inserting the packaging material of the specified length, which is the object to be printed, between the rolls on the insertion side, the surface of the object to be printed, such as the manufacturing date and the expiration date, can be automatically displayed. It can be printed on and discharged efficiently. In addition, it is possible to accurately position and print at a desired place that is arbitrarily set by adapting to various sizes of packaging materials with different widths and lengths with one device,
It is extremely economical because it is small and can be used with a small floor area. Furthermore, by using a variable length carrier with a cloth sheet as the carrier means, the generation of static electricity is reduced even when the packaging material is a plastic sheet such as a vinyl bag, and the object to be printed is easily and reliably protected from the influence of adsorption. Can be discharged.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a marking device according to a first embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of the marking device of FIG. 1 viewed from a side surface direction.

FIG. 3 is an explanatory diagram for sequentially explaining a printing operation of the marking device.

FIG. 4 is a timing chart for explaining a printing operation of the marking device.

FIG. 5 is a perspective view showing a marking device according to a second embodiment of the present invention.

6 is a perspective view showing a moving mechanism of a printing block and a moving mechanism of a discharge roll in the marking device of FIG.

FIG. 7 is a schematic configuration diagram of the marking device of FIG. 5 viewed from a side surface direction.

[Explanation of symbols]

 W Printed material 3,12 Roll on insertion side 4 Printing block 5,61 Mark receiving plate 8,66 Variable length carrier 10 Tension arm 19,22,53 Linear bearing 20,21,52 Guide bar 23,59,74 Feed Screw rod 24,60,75 Handle 36,41 Discharge side roll 42 Position detection sensor 54,73 Feeding piece 67 Winding roll

Claims (2)

[Claims] 1. A transporting means for transporting an inserted printing object to a marking position and discharging the printed printing object to the outside, and a print head arranged on a transportation path of the printing object and moving up and down. With the printing block that prints the target printing object and generates a printing end signal after printing, the printing block is moved by moving the printing block in the front-back direction, which is the conveying direction of the printing target, and the left-right direction orthogonal to each other. Based on the printing block moving means for adjusting the position, the position detection sensor for detecting the leading edge of the printed material sent immediately before the discharge side and generating the position detection signal, the marking end signal and the position detection signal. A packaging material marking device comprising a control circuit unit for driving and controlling the conveying means and the printing block. 2. The transport means includes a variable-length transport stand configured in the form of a cloth sheet, and the variable-length transport stand is at least covered when the print block is moved in the front-back direction by the print block moving means. The length between the marking positions from the insertion side of the printed matter is variable.
The marking device for the packaging material described in.