Printer device

Abstract

To provide a printer device which has a simple structure and can prevent reduction in the print quality caused by slack of an ink ribbon during back feed.SOLUTION: A printer device is a thermal transfer printer device which includes a thermal head (printing head) that heats an ink ribbon to perform printing on a printing sheet, and comprises: a single drive motor (drive source) that generates the driving force to convey the printing sheet and the ink ribbon; a head frame (guide member) which supports the thermal head, guides the ink ribbon and the printing sheet clamped between the thermal head and a platen roller, and guides the ink ribbon after printing toward a take-up reel; and a sheet-like EPDM rubber sheet (elastic member) which is attached to the surface that guides the ink ribbon after printing toward the take-up reel in the surfaces that come in contact with the ink ribbon of the head frame.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] Embodiments of the present invention relate to a printer device.

Background Art

[0002] Conventionally, in a thermal transfer printer device that heats an ink ribbon to print on printing paper, a printer device equipped with a torque limiter that absorbs the difference in conveyance speeds between the ink ribbon and the printing paper and winds up the ink ribbon while applying a predetermined tension has been proposed (for example, Patent Document 1). In the printer device of Patent Document 1, the conveyance of the printing paper and the conveyance of the ink ribbon are performed by the driving forces of separate drive sources.

[0003] In order to simplify the structure of the printer device and reduce costs and power consumption, when the conveyance of the printing paper and the conveyance of the ink ribbon are performed by the driving force of one drive source, when the printed printing paper and the ink ribbon are back-fed to the next printing start position, slack may occur in the ink ribbon due to the inertial force of the winding reel of the ink ribbon. If the next printing is started with the ink ribbon in a slack state, the ink ribbon is suddenly pulled, so a large impact is transmitted to the nip area where the printing paper and the platen roller are in contact, resulting in a problem that the print quality at the start of printing deteriorates.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The problem to be solved by the present invention is to provide a printer device that can prevent a decrease in print quality caused by slack of the ink ribbon that occurs during back-feed with a simple structure.

Means for Solving the Problems

[0005] The printer device of this embodiment is a thermal transfer type printer device equipped with a print head that heats an ink ribbon to print on printing paper, and comprises a drive source, a guide member, and an elastic member. The drive source generates a driving force to transport the printing paper and the ink ribbon. The guide member supports the print head and guides the ink ribbon and printing paper sandwiched between the print head and the platen roller, and also guides the ink ribbon toward the take-up reel after printing. The elastic member is in the form of a sheet and is attached to the surface of the guide member that contacts the ink ribbon, and which guides the ink ribbon toward the take-up reel after printing. Therefore, the width in the direction perpendicular to the ink ribbon transport direction is greater than the width of the ink ribbon. . [Brief explanation of the drawing]

[0006] [Figure 1] Figure 1 shows an example of a schematic configuration of a printer device according to the first embodiment. [Figure 2] Figure 2 is a first diagram showing an example of the detailed structure around the head frame of the printer device according to the first embodiment. [Figure 3] Figure 3 is a second diagram showing an example of the detailed structure around the head frame of the printer device according to the first embodiment. [Figure 4] Figure 4 shows an example of the results of an evaluation of the relationship between the type of elastic material and print quality. [Figure 5] Figure 5 shows an example of a schematic configuration of the printer device according to the second embodiment. [Figure 6] Figure 6 shows an example of the detailed structure around the head frame of the printer device according to the second embodiment. [Modes for carrying out the invention]

[0007] The embodiments will be described in detail below with reference to the drawings. However, the invention is not limited to the embodiments described below.

[0008] (First embodiment) First, a printer device 10, which is the first embodiment of the present invention, will be described.

[0009] (Outline configuration of the printer device) The schematic configuration of the printer device 10 according to the first embodiment will be explained using Figure 1. Figure 1 is a diagram showing an example of the schematic configuration of the printer device according to the first embodiment.

[0010] The printer device 10 is a so-called thermal transfer printer that heats an ink ribbon 22 to print on the printing paper 15. The printer device 10 prints by pulling the printing paper 15 out in the direction of arrow E from a roll paper 14 in which the printing paper 15 is wound into a roll. The roll paper 14 is pivotally supported so as to be rotatable around an axis 141 along the Y axis in Figure 1.

[0011] The printing paper 15 is, for example, label paper or tag paper. Label paper has a structure in which multiple labels of the same size are arranged at predetermined intervals on a backing sheet. The labels may have an adhesive layer formed on the back and be detachably attached to the backing sheet, which is release paper. Tag paper is, for example, thick cardboard used as price tags or shipping tags for goods.

[0012] The printing paper 15, pulled out from the roll paper 14, is wrapped around the paper guide 29 to change its orientation, and overlaps with the ink ribbon 22 pulled out from the ribbon roll 21 in the direction of arrow C. It is then held between the platen roller 25, which rotates in the direction of arrow B, and the thermal head 24, forming a nip area where the thermal head 24, ink ribbon 22, and printing paper 15 are in contact. The ribbon roll 21 is pivotally supported so as to be rotatable around an axis 211 along the Y axis in Figure 1. The platen roller 25 is pivotally supported so as to be rotatable around an axis 251 along the Y axis in Figure 1.

[0013] The thermal head 24 is equipped with multiple heating elements, and by selectively heating these heating elements, the ink coated on the ink ribbon 22 is melted. The melted ink is then transferred to the printing paper 15. This allows for the printing of desired characters, barcodes, etc.

[0014] The thermal head 24 is supported by a head frame 26. The head frame 26 guides the ink ribbon 22, which is sandwiched between the thermal head 24 and the platen roller 25, and the printing paper 15. The head frame 26 is an example of a guide member in this disclosure.

[0015] After printing is complete, the printed paper 15 passes through the head frame 26, is guided by a pair of transport rollers 16, and is ejected from the paper output slot 17. The printed paper 15 ejected from the paper output slot 17 may be manually cut at the position of the paper output slot 17, or it may be cut by a cutter (not shown) installed near the paper output slot 17.

[0016] Meanwhile, the ink ribbon 22, once printing is complete, is guided along the positive X-axis side of the head frame 26 and towards the take-up reel 23. Since the positive X-axis side of the head frame 26 extends in the Z-axis direction, the transport direction of the ink ribbon 22 is changed approximately 90° upward along this side. The take-up reel 23, which is pivotally supported around the axis 231 along the Y-axis in Figure 1, rotates in the direction of arrow D to wind up the ink ribbon 22 that has moved away from the head frame 26. Regardless of the amount of ink ribbon 22 wound onto the take-up reel 23, the ink ribbon 22 remains in contact with the point where it moves away from the side of the head frame 26. More details will be described later (see Figure 2).

[0017] On the side of the head frame 26 on the positive X-axis side, an EPDM (ethylene propylene rubber) rubber sheet 40 is attached. The EPDM rubber sheet 40 is a synthetic rubber obtained by copolymerizing ethylene and propylene and is formed into a sheet shape (flat shape). The EPDM rubber sheet 40 is attached to the side surface of the head frame 26 with an adhesive, double-sided tape, etc. Therefore, the back side of the ink ribbon 22 (the side that does not contact the printing paper 15) moves toward the take-up reel 23 through the take-up section R shown in FIG. 1 while sliding on the EPDM rubber sheet 40. The EPDM rubber sheet 40 is an example of the elastic member in the present disclosure. Note that instead of the EPDM rubber sheet 40, another elastic member having the same hardness and thickness as the EPDM rubber sheet 40 may be used.

[0018] Note that the conveyance of the printing paper 15 and the conveyance of the ink ribbon 22 are performed by one drive motor 31. The drive motor 31 is an example of the drive source in the present disclosure.

[0019] Specifically, when the drive motor 31 rotates forward, the drive gear 32 directly connected to the output shaft 311 of the drive motor 31 rotates in the direction of arrow A. The rotation of the drive gear 32 is transmitted to the platen roller drive gear �4 directly connected to the shaft 251 of the platen roller 25 via the connecting gear 33 that meshes with the drive gear 32.

[0020] The rotation of the platen roller drive gear 34 is transmitted to the connecting gear 36 that meshes with the connecting gear 35 via the connecting gear 35 that meshes with the platen roller drive gear 34.

[0021] The connecting gear 36 engages with a ribbon roll drive gear 37 and a take-up reel drive gear 38. Therefore, as the platen roller 25 rotates in the direction of arrow B, the ribbon roll 21 rotates in the direction of arrow C, and the take-up reel 23 rotates in the direction of arrow D.

[0022] As a result, the platen roller 25 rotates in the direction of arrow B. Then, due to the rotation of the platen roller 25, the printing paper 15 and the ink ribbon 22 sandwiched between the platen roller 25 and the thermal head 24 are printed while being conveyed in the positive X-axis direction. When printing is performed, in order not to slack the ink ribbon 22, the diameters and the number of teeth of each gear are set so that the conveyance speed of the ink ribbon 22 is equal to or higher than that of the platen roller 25.

[0023] When the printing on the printing paper 15 is completed, the printing paper 15 is further conveyed (fed) in the positive X-axis direction and discharged from the paper discharge port 17. Also, the ink ribbon 22 is wound around the take-up reel 23.

[0024] After the printed printing paper 15 discharged from the paper discharge port 17 is cut, the printer device 10 performs a backfeed to return the printing paper 15 to the start position of the next printing. At this time, the drive motor 31 rotates in the opposite direction to when printing is performed. That is, the drive gear 32 rotates in the opposite direction to arrow A.

[0025] When the rotation of this drive gear 32 is transmitted to the above-described respective gears, the platen roller 25, the ribbon roll 21, and the take-up reel 23 all rotate in the opposite direction to when printing is performed. As a result, the printing paper 15 and the ink ribbon 22 are conveyed in the negative X-axis direction.

[0026] The printer device 10 includes a label gap detection sensor 28 and a tag paper detection sensor 30 that detect the position of the printing paper 15 in order to determine an appropriate printing timing.

[0027] The label gap detection sensor 28 is a transmissive optical sensor, and when label paper is used for the printing paper 15, it detects an eye mark marked at the position of the label gap on the back side of the printing surface of the label paper.

[0028] The tag paper detection sensor 30 is a reflective light sensor that detects the eye mark written on the back side of the printed surface of the tag paper when tag paper is used as the printing paper 15.

[0029] These sensors operate according to the type of paper 15 used for printing, which is set before printing begins.

[0030] (Ink ribbon behavior during backfeed) Next, the behavior of the ink ribbon 22 when the printer device 10 performs backfeed will be explained using Figures 2 and 3. Figure 2 is the first diagram showing an example of the detailed structure around the head frame of the printer device of the first embodiment. Figure 3 is the second diagram showing an example of the detailed structure around the head frame of the printer device of the first embodiment.

[0031] First, the winding path of the ink ribbon 22 will be explained in more detail using Figure 2. After printing, the ink ribbon 22 is transported along the head frame 26 in the positive X-axis direction, then changes direction approximately 90° upward and is transported along the EPDM rubber sheet 40 in the positive Z-axis direction. During this process, the ink ribbon 22 is transported while sliding along the surface of the EPDM rubber sheet 40. Subsequently, the ink ribbon 22 changes direction by a refraction angle θ at point P and heads towards the winding reel 23 (see Figure 1). Point P is located at a distance of the rubber thickness t of the EPDM rubber sheet 40 from the side of the head frame 26. The magnitude of the refraction angle θ changes depending on the amount of ink ribbon 22 wound onto the winding reel 23, but the positional relationship between the axis 231 of the winding reel 23 and the head frame 26 is always set so that θ > 0, regardless of the amount of ink ribbon 22 wound onto the winding reel 23. Therefore, the ink ribbon 22 is always pressed against point P.

[0032] When the ink ribbon 22 is back-fed, the gap (backlash) in the meshing parts of the various gears mentioned above may prevent the ink ribbon 22 from being rewound uniformly in the winding section R shown in Figure 1. In such cases, slack occurs in the ink ribbon 22 in the winding section R. In particular, when back-feeding occurs when a large amount of ink ribbon 22 is wound onto the winding reel 23, the inertial force of the winding reel 23 increases, making slack more likely to occur compared to when a small amount of ink ribbon 22 is wound onto it.

[0033] Thus, if the next print is started with slack in the ink ribbon 22 in the winding section R, the slack ink ribbon 22 is suddenly pulled taut, transmitting a large shock to the nip area where the thermal head 24, ink ribbon 22, print paper 15, and platen roller 25 come into contact. As a result, print quality may be reduced, resulting in print wobble or smudging at the start of printing.

[0034] In this embodiment, the printer device 10 has an EPDM rubber sheet 40 attached to the head frame 26. This allows the EPDM rubber sheet 40 to absorb the shock when the slack in the ink ribbon 22 is suddenly pulled at the start of printing, as the EPDM rubber sheet 40 has elastic force to absorb the shock. This reduces the shock transmitted to the nip area, thus preventing a decrease in print quality.

[0035] As shown in Figure 3, the width Wa of the EPDM rubber sheet 40 in the direction perpendicular to the transport direction of the ink ribbon 22 is set to be greater than the width Wb of the ink ribbon 22. In addition, the EPDM rubber sheet 40 protrudes from the ends of the ink ribbon 22 at both ends in the width direction of the ink ribbon 22. As a result, the entire surface of the ink ribbon 22 is in contact with the EPDM rubber sheet 40 on the side surface of the head frame 26.

[0036] With this configuration, even if the ink ribbon 22 meanders, the back surface of the ink ribbon 22 and the EPDM rubber sheet 40 can be reliably brought into contact and slid.

[0037] (Design conditions for EPDM rubber sheets) Using Figure 4, we will explain the appropriate design conditions for the EPDM rubber sheet 40. Figure 4 is a diagram showing an example of the results of evaluating the relationship between the type of elastic material and print quality.

[0038] The main design parameters of the EPDM rubber sheet 40 used in the printer device 10 of this embodiment are the rubber hardness H and the rubber thickness t.

[0039] Rubber hardness (H) is measured by pressing a measuring instrument called a durometer against a test piece and determining how deeply a needle, under a constant force, sinks into the piece. The measurement result is expressed as a degree, with a lower degree indicating softer rubber. For example, a hardness of 100° represents a state as hard as glass, while the hardness of typical rubber is around 40° to 70°.

[0040] The rubber thickness t is the thickness of the EPDM rubber sheet 40.

[0041] The inventors of this invention evaluated the print quality using a printer device 10 with multiple EPDM rubber sheets 40 having different rubber hardness H and rubber thickness t. They also compared the print quality with and without the EPDM rubber sheets 40. Figure 4 shows an example of the evaluation results.

[0042] The evaluation results showed that the ideal rubber hardness H for the EPDM rubber sheet 40 is between 45° and 65°.

[0043] It was found that when the rubber hardness H is lower than 45° (softer), the silicone applied to the back side of the ink ribbon 22 to improve its sliding properties adheres to the surface of the EPDM rubber sheet 40. Furthermore, it was found that the adhesion of silicone to the surface of the EPDM rubber sheet 40 improves its slipperiness, reducing its shock absorption effect when the ink ribbon 22 is suddenly pulled and subjected to high tension, leading to a decrease in print quality.

[0044] On the other hand, it was found that when the rubber hardness H is higher than 65° (harder), the shock absorption effect when the ink ribbon 22 is suddenly pulled and subjected to high tension is reduced, leading to a decrease in print quality.

[0045] Furthermore, the evaluation revealed that the rubber thickness t of the EPDM rubber sheet 40 is preferably between 0.5 mm and 2.0 mm.

[0046] If the rubber thickness t is too thin, durability will decrease, so it is desirable that it be at least 0.5 mm thick. On the other hand, if the rubber thickness t of the EPDM rubber sheet 40 exceeds 2.0 mm, in the region where the rubber hardness H of the EPDM rubber sheet 40 is low (soft), when tension is applied to the ink ribbon 22, the ink ribbon 22 will bend the EPDM rubber sheet 40 considerably, pulling on the ink ribbon 22 that is in contact with the thermal head 24, resulting in a decrease in print quality. Furthermore, it was found that the region where the rubber thickness t is 2.0 mm or more is an unstable combination region between the rubber thickness t and the hardness of the EPDM rubber sheet 40, so it is desirable that the rubber thickness t be 2.0 mm or less.

[0047] (Effects of the first embodiment) As described above, the printer device 10 of the embodiment is a thermal transfer type printer device equipped with a thermal head 24 (print head) that heats an ink ribbon 22 to print on a printing paper 15, and comprises a single drive motor 31 (drive source) that generates a driving force to transport the printing paper 15 and the ink ribbon 22, a head frame 26 (guide member) that supports the thermal head 24 and guides the ink ribbon 22 and the printing paper 15 sandwiched between the thermal head 24 and the platen roller 25, and also guides the ink ribbon 22 after printing toward a take-up reel 23, and a sheet-shaped EPDM rubber sheet 40 (elastic member) attached to the surface of the head frame 26 that contacts the ink ribbon 22 and guides the ink ribbon 22 after printing toward a take-up reel 23. Therefore, the EPDM rubber sheet 40 absorbs the shock caused by the sudden pulling of the ink ribbon 22 at the start of printing, thus preventing a decrease in print quality caused by slack in the ink ribbon 22 during backfeed, with a simple structure.

[0048] Furthermore, in the printer device 10 of this embodiment, the width Wa of the EPDM rubber sheet 40 (elastic member) in the direction perpendicular to the transport direction of the ink ribbon 22 is greater than the width Wb of the ink ribbon 22. Therefore, even if the ink ribbon 22 meanders, the back surface of the ink ribbon 22 and the EPDM rubber sheet 40 can be reliably brought into contact and slid.

[0049] Furthermore, in the printer device 10 of this embodiment, the rubber hardness H of the EPDM rubber sheet 40 (elastic member) is in the range of 45° to 60°, and the rubber thickness t of the EPDM rubber sheet 40 (elastic member) is in the range of 0.5 mm to 2.0 mm. Therefore, it is possible to prevent a decrease in print quality caused by slack in the ink ribbon 22 that occurs during backfeed.

[0050] Furthermore, in the printer device 10 of this embodiment, the elastic member is an EPDM rubber sheet 40. Therefore, the EPDM rubber sheet 40 absorbs the shock caused by the ink ribbon 22 being suddenly pulled when printing starts, thus preventing a decrease in print quality caused by the slack of the ink ribbon 22 that occurs during backfeed, with a simple structure.

[0051] (Second embodiment) Next, a printer device 11, which is a second embodiment of the present invention, will be described.

[0052] (Outline configuration of the printer device) Figure 5 shows an example of the schematic configuration of a printer device according to the second embodiment. The printer device 11 shown in Figure 5 is equipped with a head frame 27 instead of the head frame 26 that is present in the printer device 10 described in the first embodiment. Since the operation of each part of the printer device 11 is the same as that of the printer device 10 described above, a further explanation will be omitted, and only the differences from the printer device 10 will be explained.

[0053] The head frame 27 maintains the thermal head 24 in contact with the platen roller 25. The head frame 27 is an example of a guide member in this disclosure.

[0054] Once printing is complete, the ink ribbon 22 is guided along the positive X-axis side of the head frame 27 towards the take-up reel 23. On this side, the transport direction of the ink ribbon 22 is changed to the upper right in Figure 5. The take-up reel 23, which is pivotally supported around an axis 231 along the Y-axis in Figure 5, rotates in the direction of arrow D to wind up the ink ribbon 22 that has moved away from the head frame 27. Regardless of the amount of ink ribbon 22 wound onto the take-up reel 23, the ink ribbon 22 remains in contact with the point where it moves away from the side of the head frame 27. More details will be provided later (see Figure 6).

[0055] An EPDM rubber sheet 41 is attached to the positive X-axis side of the head frame 27. The EPDM rubber sheet 41 is molded into a sheet (planar) shape. The EPDM rubber sheet 41 is attached to the side of the head frame 27 with an adhesive or the like. Therefore, the back side of the ink ribbon 22 (the side that does not come into contact with the printing paper 15) slides against the EPDM rubber sheet 41 as it moves towards the take-up reel 23 through the take-up section R shown in Figure 5. The EPDM rubber sheet 41 is an example of an elastic member in this disclosure.

[0056] The orientation of the side surface of the head frame 26 in the first embodiment, or the side surface of the head frame 27 in the second embodiment, can be determined according to the positional relationship between the head frame and the take-up reel 23 in the printer device. That is, the orientation of the side surface of the head frame should be such that the ink ribbon 22 wound onto the take-up reel 23 is always in contact with a point spaced apart from the side surface of the head frame, regardless of the amount of ink ribbon 22 wound onto the take-up reel 23.

[0057] (Ink ribbon behavior during backfeed) Next, the behavior of the ink ribbon 22 when the printer device 11 performs backfeed will be explained using Figure 6. Figure 6 is a diagram showing an example of the detailed structure around the head frame of the printer device of the second embodiment.

[0058] Figure 6 will be used to explain the winding path of the ink ribbon 22 in more detail. After printing, the ink ribbon 22 is transported along the head frame 26 in the positive X-axis direction, then changes direction to the upper right in Figure 6, and is transported along the EPDM rubber sheet 41 in the positive Z-axis direction. During this process, the ink ribbon 22 slides along the surface of the EPDM rubber sheet 41 as it is transported. Subsequently, the ink ribbon 22 changes direction by a refraction angle θ at point Q and heads towards the winding reel 23 (see Figure 5). Point Q is located at a distance of the rubber thickness t of the EPDM rubber sheet 41 from the side of the head frame 27. The magnitude of the refraction angle θ changes depending on the amount of ink ribbon 22 wound onto the winding reel 23, but the positional relationship between the shaft 231 of the winding reel 23 and the head frame 27 is always set so that θ > 0, regardless of the amount of ink ribbon 22 wound onto the winding reel 23. Therefore, the ink ribbon 22 is always pressed against point Q.

[0059] When the ink ribbon 22 is back-fed, the gap (backlash) in the meshing parts of the various gears mentioned above may prevent the ink ribbon 22 from being rewound uniformly in the winding section R shown in Figure 5. In such cases, slack occurs in the ink ribbon 22 in the winding section R. Furthermore, when back-feeding is performed when a large amount of ink ribbon 22 is wound onto the winding reel 23, the inertial force of the winding reel 23 increases, making slack more likely to occur compared to when a small amount of ink ribbon 22 is wound onto it.

[0060] Thus, if the next print is started in the winding section R while the ink ribbon 22 is slack, the slack ink ribbon 22 is suddenly pulled taut, transmitting a large shock to the nip area where the thermal head 24, ink ribbon 22, print paper 15, and platen roller 25 are in contact. As a result, print quality may deteriorate, resulting in print blurring, smudging, etc.

[0061] (Effects of the second embodiment) As described above, in this embodiment, the printer device 11 has an EPDM rubber sheet 41 attached to the head frame 27, so that when the ink ribbon 22 that has become loose is suddenly pulled at the start of printing, the impact of the EPDM rubber sheet 41 is absorbed by the elastic force of the EPDM rubber sheet 41. This reduces the impact transmitted to the nip area, and thus prevents a decrease in print quality.

[0062] Although embodiments of the present invention have been described above, these embodiments are illustrative and are not intended to limit the scope of the invention. This novel embodiment can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents. [Explanation of Symbols]

[0063] 10,11 Printer device 14 roll paper 15 Printing paper 16 Conveyor rollers 17 Paper output slot 21 Ribbon Roll 22 Ink Ribbons 23. Reel 24 Thermal head (print head) 25 Platen Roller 26,27 Head frame (guide member) 28 Label gap detection sensor 29 Paper guide 30 Tag paper detection sensor 31. Drive motor (power source) 32 drive gears 33, 35, 36 Linking gears 34 Platen roller drive gear 37 Ribbon Roll Drive Gear 38. Winding reel drive gear 40,41 EPDM rubber sheet (elastic material) H Rubber hardness P,Q points R winding section t Rubber thickness Wa, Wb width θ is the angle of refraction. [Prior art documents] [Patent Documents]

[0064] [Patent Document 1] Japanese Patent Application Publication No. 7-89171

Claims

1. A thermal transfer printer device equipped with a print head that heats an ink ribbon to print on paper, A single drive source that generates a driving force for transporting the printing paper and the ink ribbon, A guide member that supports the print head, guides the ink ribbon and the printing paper sandwiched between the print head and the platen roller, and guides the ink ribbon toward the winding reel after printing, The guide member comprises a sheet-like elastic member attached to the surface of the guide member that contacts the ink ribbon, specifically the surface that guides the printed ink ribbon toward the take-up reel, the sheet-like elastic member having a width in a direction perpendicular to the transport direction of the ink ribbon that is greater than the width of the ink ribbon, Printer device.

2. The rubber hardness of the elastic member is in the range of 45° to 60°. The rubber thickness of the elastic member is in the range of 0.5 mm to 2.0 mm. The printer device according to claim 1.

3. The elastic member is It is an EPDM rubber sheet. The printer device according to claim 2.

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