Coating apparatus and thermal transfer printer having it

Abstract

This invention discloses a laminating device and a thermal transfer printer having the same. The laminating device is used in a thermal transfer printer and includes a first frame, a pressing assembly, and a drive assembly. The pressing assembly is disposed downstream of the printing assembly along the printing direction and includes a first roller and a second roller. The axis of the second roller is parallel to the axis of the first roller. At least one of the second roller and the first roller has an elastic outer peripheral layer. The second roller and the first roller are rotatably connected to the first frame and are used to receive and hold the printing medium and a protective film to press the protective film onto the outer surface of the printing medium. The drive assembly is connected to one of the first roller and the second roller. Thus, by disposing of the pressing assembly downstream of the printing assembly along the printing direction, the protective film can be pressed onto the printing medium, enabling automatic laminating of the printing medium output by the thermal transfer printer, which is convenient to operate.

Description

Technical Field

[0001] This invention relates to the field of thermal transfer printers, and more particularly to a laminating apparatus and a thermal transfer printer having the same. Background Technology

[0002] Existing thermal transfer printers do not have a lamination structure and cannot automatically laminate the printed media.

[0003] To address these issues, the present invention provides a coating apparatus and a thermal transfer printing press having the same, thereby at least partially solving the aforementioned problems. Summary of the Invention

[0004] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed embodiments section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above-mentioned technical problems, the present invention provides a laminating apparatus for a thermal transfer printer. The thermal transfer printer includes a printing assembly that moves a printing medium along a printing direction. The laminating apparatus includes:

[0006] First rack;

[0007] A laminating assembly, disposed downstream of the printing assembly along the printing direction, includes:

[0008] First roller;

[0009] A second roller, the axis of which is parallel to the axis of the first roller, has an outer peripheral layer that is elastic at least one of the second and first rollers, and is rotatably connected to a first frame. The second and first rollers are used to receive and hold the printing medium and a protective film to press the protective film onto the outer surface of the printing medium.

[0010] A drive assembly is connected to one of the first and second rollers.

[0011] According to the coating apparatus of the present invention, the pressing component is disposed downstream of the printing component along the printing direction A, so that the printing medium and protective film output by the printing component extend through the space between the first roller and the second roller. By rotating the first roller and the second roller, the printing medium and the protective film can be continuously received into the space between the first roller and the second roller. At this time, the first roller and the second roller clamp the printing medium and the protective film to press the protective film onto the printing medium. In this way, the printing medium output by the thermal transfer printer is automatically coated, which is convenient to operate.

[0012] Optionally, the coating apparatus further includes a heating component, which passes through at least one of the first roller and the second roller.

[0013] Optionally, the coating apparatus also includes a Teflon membrane that separates the first frame from the heating assembly to reduce the heat transferred from the heating assembly to the first frame.

[0014] Optionally, the coating apparatus further includes an adjustment component connected to at least one of the first roller and the second roller for adjusting the distance between the first roller and the second roller.

[0015] Optionally, the adjustment component includes:

[0016] The guide rail is fixedly connected to the first frame;

[0017] slider;

[0018] A fixing plate is fixedly connected to the first frame, and the fixing plate has threaded holes.

[0019] An adjusting element, one end of which is rotatably connected to the slider, is threadedly connected to a threaded hole and is used to move the slider.

[0020] The slider and guide rail work together.

[0021] The slider is connected to the first roller to guide the movement of the first roller, or

[0022] The slider is connected to the second roller to guide its movement.

[0023] Optionally, the laminating apparatus also includes an antistatic roller, which is rotatably connected to the first frame.

[0024] Antistatic rollers are used to remove static electricity from the protective film entering the laminating assembly, and / or

[0025] Antistatic rollers are used to remove static electricity from the printing media output from the laminating assembly.

[0026] Optionally, the laminating apparatus includes at least two laminating components, which are spaced apart along the printing direction.

[0027] Optionally, the coating apparatus also includes a guide plate connected to the first frame.

[0028] The guide plate is used to guide the printing media and protective film into the laminating assembly, and / or

[0029] The guide plate is used to guide the movement of the printing media from which the overlay assembly is removed.

[0030] Optionally, the coating device further includes:

[0031] A film-laying assembly is connected to the first frame to provide a protective film.

[0032] The present invention also provides a thermal transfer printer, wherein the thermal transfer printer moves the printing medium along the printing direction, and the thermal transfer printer includes:

[0033] Second rack;

[0034] Printing components; and

[0035] The aforementioned coating device;

[0036] The first frame is connected to the second frame, and the overlay assembly is located downstream of the printing assembly along the printing direction.

[0037] According to the thermal transfer printer of the present invention, the thermal transfer printer includes the aforementioned coating device. The pressing component is disposed downstream of the printing component along the printing direction A, so that the printing medium and protective film output by the printing component extend through the space between the first roller and the second roller. By rotating the first roller and the second roller, the printing medium and the protective film can be continuously received into the space between the first roller and the second roller. At this time, the first roller and the second roller clamp the printing medium and the protective film to press the protective film onto the printing medium. In this way, the printing medium output by the thermal transfer printer is automatically coated, which is convenient to operate. Attached Figure Description

[0038] To make the advantages of the invention more readily apparent, the invention briefly described above will be described in more detail with reference to the specific embodiments shown in the accompanying drawings. It will be understood that these drawings depict only typical embodiments of the invention and should not be considered as limiting its scope of protection. The invention is described and explained with additional features and details through the drawings.

[0039] Figure 1 A perspective view of a laminating apparatus connected to a thermal transfer printer according to a preferred embodiment of the present invention;

[0040] Figure 2 for Figure 1 A three-dimensional schematic diagram of the coating device;

[0041] Figure 3 for Figure 2 A partially enlarged schematic diagram of section B of the coating device;

[0042] Figure 4 for Figure 2 A three-dimensional schematic diagram of the first frame, antistatic roller, guide plate, adjusting components, and Teflon film of the coating device connected together; and

[0043] Figure 5 for Figure 1 A three-dimensional schematic diagram showing the bonding component, drive component, heat insulation plate, and heating component of the film coating device connected together.

[0044] Explanation of reference numerals in the attached figures

[0045] 110: Printing Components 120: First Rack

[0046] 121: First mounting plate 122: Second mounting plate

[0047] 123: Connecting rod; 130: Overlay assembly

[0048] 131: First roller; 132: Second roller

[0049] 133: First rubber layer; 134: Second rubber layer

[0050] 135: Lubrication sleeve; 140: Heating assembly

[0051] 150: Teflon membrane; 160: Adjustment component

[0052] 161: Guide rail 162: Slider

[0053] 163: Fixed plate; 164: Adjustable component

[0054] 165: Baffle 166: Clearance

[0055] 170: Antistatic roller; 171: First antistatic roller

[0056] 172: Second antistatic roller; 180: Guide plate

[0057] 181: First guide plate 182: Second guide plate

[0058] 190: Film feeding assembly; 191: Film feeding roller

[0059] 192: Protective film roll; 200: Drive assembly

[0060] 210: Drive motor; 220: Drive reducer

[0061] 230: Insulation board Detailed Implementation

[0062] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that embodiments of the invention may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with embodiments of the invention.

[0063] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. It should be noted that the terms "upper," "lower," and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0064] In this document, ordinal numbers such as “first” and “second” used in this application are merely identifiers and do not have any other meaning, such as a specific order. Moreover, for example, the term “first component” does not imply the existence of a “second component”, and the term “second component” does not imply the existence of a “first component”.

[0065] To fully understand the embodiments of the present invention, detailed structures will be presented in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of the present invention are described in detail below; however, in addition to these detailed descriptions, the present invention may have other embodiments.

[0066] This invention provides a coating apparatus for a thermal transfer printer. The thermal transfer printer includes a printing assembly 110 and a second frame. The printing assembly 110 moves a printing medium along a printing direction A to print text and / or patterns on the surface of the printing medium (e.g., paper or tape). The coating apparatus can be positioned downstream of the printing assembly 110 along the printing direction A. Thus, the coating apparatus can receive the printing medium output from the printing assembly 110 and apply a protective film to the surface of the printing medium.

[0067] Please refer to Figures 1 to 5 The film coating device includes a first frame 120, a film feeding assembly 190, and a pressing assembly 130.

[0068] like Figures 1 to 4 As shown, the first frame 120 includes a first mounting plate 121, a second mounting plate 122, and a connecting rod 123. The first mounting plate 121 and the second mounting plate 122 are generally parallel. The connecting rod 123 is disposed between the first mounting plate 121 and the second mounting plate 122. One end of the connecting rod 123 is connected to the first mounting plate 121, and the other end of the connecting rod 123 is connected to the second mounting plate 122. The first frame 120 can be used to connect to a second frame of a thermal transfer printer. The first frame 120 is located downstream of the printing assembly 110 along the printing direction A. It is understood that, in embodiments not shown, the first frame may not be connected to the thermal transfer printer.

[0069] Please refer to Figure 1 and Figure 2The film feeding assembly 190 includes a film feeding roller 191 and a protective film roll 192. The protective film roll 192 is detachably fitted onto the film feeding roller 191. One end of the film feeding roller 191 is rotatably connected to a first mounting plate 121, and the other end of the film feeding roller 191 is rotatably connected to a second mounting plate 122. In this way, the film feeding assembly 190 can rotate, thereby providing the protective film.

[0070] Please refer to Figure 1 and Figure 5 The pressing assembly 130 is located downstream of the printing assembly 110 along the printing direction A. The pressing assembly 130 includes a first roller 131, a second roller 132, and a lubrication sleeve 135. The first roller 131 and the second roller 132 can be constructed as steel tubes. The outer peripheral layer of the first roller 131 (the outermost layer of the first roller 131 along its radial direction) is constructed as a first rubber layer 133. Thus, the outer peripheral layer of the first roller 131 is elastic. The outer peripheral layer of the second roller 132 (the outermost layer of the second roller 132 along its radial direction) is constructed as a second rubber layer 134. Thus, the outer peripheral layer of the second roller 132 is elastic. Therefore, when the protective film is pressed onto the printing medium by the first roller 131 and the second roller 132, damage to the protective film can be minimized.

[0071] The lubrication sleeve 135 can be constructed as a copper sleeve. One end of the first roller 131 is rotatably connected to the first mounting plate 121 via the lubrication sleeve 135, and the other end of the first roller 131 is rotatably connected to the second mounting plate 122 via the lubrication sleeve 135. This allows the first roller 131 to rotate. One end of the second roller 132 is rotatably connected to the first mounting plate 121 via the lubrication sleeve 135, and the other end of the second roller 132 is rotatably connected to the second mounting plate 122 via the lubrication sleeve 135. This allows the second roller 132 to rotate. The second roller 132 is located below the first roller 131. The axis of the first roller 131 is approximately parallel to the second roller 132.

[0072] The printing medium output from the printing assembly 110 and the protective film output from the film dispensing assembly 190 extend through the space between the first roller 131 and the second roller 132. At this time, the first rubber layer 133 and the second rubber layer 134 clamp the printing medium and the protective film.

[0073] When the drive assembly 200 drives the second roller 132 to rotate, the first roller 131 rotates under the action of friction. The rotating first roller 131 and second roller 132 can continuously receive the printing medium and protective film between the first rubber layer 133 and the second rubber layer 134. At the same time, the first rubber layer 133 and the second rubber layer 134 can press the protective film onto the printing medium and transport the printing medium with the protective film pressed onto it away from the pressing assembly 130.

[0074] It is understood that the laminating assembly 130 can be used to apply a protective film to one side of the printing medium. In this case, the protective film is only applied to one side of the printing medium (e.g., above or below a horizontally positioned printing medium). The laminating assembly 130 can also be used to apply a double-sided laminating assembly to the printing medium. In this case, the protective film is applied to both sides of the printing medium (e.g., above and below a horizontally positioned printing medium).

[0075] In this embodiment, the pressing component 130 is disposed downstream of the printing component 110 along the printing direction A, so that the printing medium and protective film output by the printing component 110 extend through the space between the first roller 131 and the second roller 132. By rotating the first roller 131 and the second roller 132, the printing medium and the protective film can be continuously received into the space between the first roller 131 and the second roller 132. At this time, the first roller 131 and the second roller 132 clamp the printing medium and the protective film to press the protective film onto the printing medium. This automatically coats the printing medium output by the thermal transfer printer, which is convenient to operate.

[0076] Preferably, the coating apparatus includes at least two pressing components 130 (e.g., two). The at least two pressing components 130 are spaced apart along the printing direction A. Thus, by pressing the protective film onto the printing medium through at least two pressing components 130, the coating effect can be further improved.

[0077] Please continue to refer to this. Figure 4 The coating apparatus also includes a heating assembly 140. The heating assembly 140 includes a quartz heating tube, which is inserted into the first roller 131. The quartz heating tube can heat the first rubber layer 133 through the first roller 131, thereby heating the protective film. This can further improve the coating effect. It is understood that a quartz heating tube can also be installed inside the second roller 132.

[0078] like Figure 2 and Figure 5 As shown, the coating apparatus also includes a drive assembly 200. The drive assembly 200 includes a drive motor 210 and a drive reducer 220. The drive motor 210 is connected to the drive reducer 220. The drive reducer 220 is connected to the second roller 132 via gears to drive the second roller 132 to rotate. Preferably, the drive reducer 220 is connected to the second rollers 132 of two adjacent coating assemblies 130 via gears. It is understood that, in embodiments not shown, the drive reducer may also be connected to the first roller to drive the first roller to rotate.

[0079] Please refer to Figures 2 to 4The coating apparatus also includes an adjustment assembly 160. The adjustment assembly 160 is connected to the first roller 131 to move the first roller 131 up and down, thereby adjusting the distance between the first roller 131 and the second roller 132. Thus, the distance between the first roller 131 and the second roller 132 can be adjusted according to the thickness of the printing medium to be coated and the thickness of the protective film, so that the protective film can firmly adhere to the printing medium.

[0080] Preferably, such as Figure 3 As shown, the adjusting assembly 160 includes a guide rail 161, a slider 162, a fixing plate 163, an adjusting member 164, and a baffle 165. A second mounting plate 122 is connected to the adjusting assembly 160. The guide rail 161 is fixedly connected to the second mounting plate 122. The slider 162 is connected to one end of the first roller 131 via the previously mentioned lubrication sleeve 135. The slider 162 and the guide rail 161 cooperate to guide the up-and-down movement of the first roller 131.

[0081] The fixing plate 163 is fixedly connected to the second mounting plate 122. The fixing plate 163 has threaded holes. The adjusting member 164 can be constructed as a columnar structure with its axis extending in the vertical direction. This columnar structure has external threads.

[0082] The baffle 165 has a through hole. The slider 162 has a clearance space 166 corresponding to the through hole. The baffle 165 is connected to the slider 162. The adjusting member 164 is threadedly connected to the threaded hole of the fixing plate 163. The end of the adjusting member 164 extending out of the fixing plate 163 passes through the through hole from top to bottom and enters the clearance space 166. The part of the adjusting member 164 entering the clearance space 166 can be connected to a nut or a retaining ring. In this way, the adjusting member 164 can rotate.

[0083] Rotating the adjusting member 164 causes it to move upward, thereby moving the first roller 131 upward. Rotating the adjusting member 164 also causes it to move downward, so that the end of the adjusting member 164 located within the clearance space 166 can press down on the slider 162 (when the adjusting member 164 is connected to the nut, the end of the adjusting member 164 protrudes from the nut), thereby applying a force to the first roller 131 in the direction of the second roller 132. This force causes the first roller 131 to move downward, thereby pressing the protective film and printing medium tightly against the second rubber layer 134 by the first rubber layer 133.

[0084] The first mounting plate 121 is connected to another adjustment component 160. The other adjustment component 160 is configured in a manner roughly the same as that of the adjustment component 160 connected to the second mounting plate 122, and will not be described in detail here.

[0085] It is understood that, in embodiments not shown, the adjustment assembly may also be connected to the second roller via a guide rail and a slider for adjusting the position of the second roller relative to the first roller.

[0086] Preferably, such as Figure 1 , Figure 2 and Figure 4 As shown, the first frame 120 includes a plurality of connecting rods 123. The plurality of connecting rods 123 are spaced apart. The coating device also includes a plurality of antistatic rollers 170. The antistatic rollers 170 may be made of antistatic silicone. The plurality of antistatic rollers 170 and the plurality of connecting rods 123 correspond one-to-one. The antistatic rollers 170 are rotatably fitted around the outer periphery of the corresponding connecting rods 123.

[0087] like Figure 1 As shown, the antistatic roller 170 includes a first antistatic roller 171 and a second antistatic roller 172. Along the direction of movement of the protective film, a portion of the connecting rod 123 and the first antistatic roller 171 are located between the film feeding assembly 190 and the pressing assembly 130. Thus, the protective film output from the film feeding assembly 190 passes through and contacts the first antistatic roller 171 before entering the pressing assembly 130. This removes static electricity from the protective film output from the film feeding assembly 190.

[0088] Part of the connecting rod 123 and the second antistatic roller 172 are located at the tail end of the coating device along the printing direction A. Thus, the printing medium output from the laminating assembly 130 passes through and contacts the second antistatic roller 172 before being output from the laminating device. This removes static electricity from the printing medium after the protective film has been applied.

[0089] It is understood that a connecting rod 123 and an antistatic roller 170 can also be provided between adjacent laminating assemblies 130. In this way, the printing media conveyed between adjacent laminating assemblies 130 passes through and contacts the antistatic roller 170. In addition, the antistatic roller 170 is rotatably provided to support the protective film or printing media, and to guide the movement of the protective film or printing media.

[0090] Preferably, please refer to Figure 4The laminating apparatus also includes multiple guide plates 180. One end of each guide plate 180 is connected to a first mounting plate 121. The other end of each guide plate 180 is connected to a second mounting plate 122. Each guide plate 180 includes a first guide plate 181 and a second guide plate 182. The first guide plate 181 can be positioned upstream of the laminating assembly 130 along the printing direction A to support the protective film and the printing medium, and to guide their movement. The second guide plate 182 can be positioned downstream of the laminating assembly 130 along the printing direction A to support the printing medium and guide its movement. Guide plates 180 can also be positioned between adjacent laminating assemblies 130. Thus, the guide plate 180 can support and guide the printing medium between adjacent laminating assemblies 130.

[0091] Preferably, please refer to Figure 4 The coating device also includes a Teflon film 150. A portion of the first mounting plate 121 is covered with the Teflon film 150. The Teflon film 150 is located between the guide rail 161 and the first mounting plate 121, and between the slider 162 and the first mounting plate 121. Thus, the Teflon film 150 separates the first mounting plate 121 and the slider 162, and further separates the heating assembly 140 and the first mounting plate 121. This reduces the heat transferred from the heating assembly 140 to the first mounting plate 121 via the first roller 131 and the slider 162.

[0092] The second mounting plate 122 is also covered with a Teflon film 150. The Teflon film on the second mounting plate 122 is installed in a manner similar to that on the first mounting plate 121, and will not be described in detail here.

[0093] It is understood that, in embodiments not shown, the Teflon film can also be disposed in other locations, as long as it reduces the heat transferred from the heating components to the first frame. For example, the Teflon film can be applied to the outer surface of the slider.

[0094] Preferably, such as Figure 3 and Figure 5 As shown, the coating apparatus also includes heat insulation plates 230. Heat insulation plates 230 are provided at both ends of the first roller 131. The heat insulation plates 230 are connected to the outer side of the slider 162 (the surface of the slider 162 away from the first rubber layer 133). Thus, the heat insulation plates 230 can close the end opening of the first roller 131 to prevent the heating assembly 140 from being exposed. The heat insulation plates 230 shield the slider 162. This prevents workers from touching the slider 162 and the heating assembly 140 and being burned.

[0095] The present invention also provides a thermal transfer printer. The thermal transfer printer includes a second frame, a printing assembly, and the aforementioned laminating device. The printing assembly 110 is used to move a printing medium along a printing direction A to print text and / or patterns on the surface of the printing medium (e.g., paper or tape). The first frame is connected to the second frame, and the laminating assembly is disposed downstream of the printing assembly along the printing direction.

[0096] In this embodiment, the thermal transfer printer includes the aforementioned coating device. The pressing assembly 130 is disposed downstream of the printing assembly 110 along the printing direction A, so that the printing medium and protective film output by the printing assembly 110 extend through the space between the first roller 131 and the second roller 132. By rotating the first roller 131 and the second roller 132, the printing medium and the protective film can be continuously received into the space between the first roller 131 and the second roller 132. At this time, the first roller 131 and the second roller 132 clamp the printing medium and the protective film to press the protective film onto the printing medium. This automatically coats the printing medium output by the thermal transfer printer, which is convenient to operate.

[0097] The present invention has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, those skilled in the art will understand that the present invention is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of the present invention, all of which fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

[0098] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the invention. Terms such as “component” as used herein may refer to a single part or a combination of multiple parts. Terms such as “installation” or “installation” as used herein may refer to a component being directly attached to another component or a component being attached to another component via an intermediary. A feature described in one embodiment herein may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0099] The present invention has been described through the above embodiments; however, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the present invention to the described embodiments. Those skilled in the art will understand that many variations and modifications can be made based on the teachings of the present invention, and all such variations and modifications fall within the scope of protection claimed by the present invention.

Claims

1. A coating device, characterized in that, The laminating device is used in a thermal transfer printer, the thermal transfer printer including a printing assembly that moves a printing medium along a printing direction, and the laminating device comprising: A first frame, the first frame including a first mounting plate, a second mounting plate and a connecting rod, the connecting rod being connected to the first mounting plate and the second mounting plate; A laminating assembly, the laminating assembly being disposed downstream of the printing assembly along the printing direction, the laminating assembly comprising: First roller; A second roller, the axis of which is parallel to the axis of the first roller, has an elastic outer peripheral layer at least one of the second roller and the first roller, and is rotatably connected to the first frame. The second roller and the first roller are used to receive and clamp the printing medium and the protective film to press the protective film onto the outer surface of the printing medium; and A drive assembly connected to one of the first roller and the second roller; A heating assembly, wherein the heating assembly is disposed in at least one of the first roller and the second roller; A Teflon membrane is used to separate the heating assembly from the first frame to reduce the heat transferred from the heating assembly to the first frame. The heat insulation plate is provided at both ends of the first roller; The coating device further includes an antistatic roller, which is rotatably sleeved on the connecting rod. The antistatic roller is used to remove static electricity from the protective film entering the laminating assembly, and / or The antistatic roller is used to remove static electricity from the printing media output from the laminating assembly; The coating apparatus further includes an adjustment component connected to at least one of the first roller and the second roller for adjusting the distance between the first roller and the second roller; The adjustment component includes: The guide rail is fixedly connected to the first frame; A slider having clearance space; A fixing plate, which is fixedly connected to the first frame, has threaded holes; A baffle having a through hole corresponding to the clearance space, and the baffle being connected to the slider; An adjusting component is threadedly connected to the threaded hole. The end of the adjusting component extending out of the fixed plate passes through the through hole and enters the clearance space. The part of the adjusting component entering the clearance space is connected to a nut or a retaining ring, thereby rotatably connecting to the slider for driving the slider to move. The slider and the guide rail cooperate, and the heat insulation plate is connected to the outer side of the slider. The slider is connected to the first roller to guide the movement of the first roller, or The slider is connected to the second roller to guide the movement of the second roller.

2. The coating apparatus according to claim 1, characterized in that, The coating apparatus includes at least two of the coating components, which are spaced apart along the printing direction.

3. The coating apparatus according to claim 1, characterized in that, The coating device also includes a guide plate connected to the first frame. The guide plate is used to guide the printing medium and the protective film into the lamination assembly, and / or The guide plate is used to guide the movement of the printing medium from which the overlay assembly is removed.

4. The coating apparatus according to claim 1, characterized in that, The coating device further includes: A film-laying assembly, connected to the first frame, for providing the protective film.

5. A thermal transfer printer, wherein the thermal transfer printer moves the printing medium along the printing direction, characterized in that, The thermal transfer printer includes: Second rack; Printing components; and The coating apparatus according to any one of claims 1 to 4; The first frame is connected to the second frame, and the overlay assembly is disposed downstream of the printing assembly along the printing direction.

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