A device that solves the shrinkage problem of plastic film in the upper and lower pattern alignment units of a bag making machine

Abstract

To provide a device that solves the problem of shrinkage of plastic film in the upper and lower pattern alignment units of a bag making machine. [Solution] This device is used to pull a printed film A1 output from a folding mechanism 91 so as to advance it gradually toward a heat-sealing mechanism 93. It includes a frame 10, an output roller set 20, a first pulling path, and a control device. The frame is disposed between the folding mechanism and the heat-sealing mechanism. The output roller set is mounted on the frame adjacent to the heat-sealing mechanism. The first pulling path is disposed along the extension direction of the frame and includes a plurality of first idler pulleys 121, a first tension buffer device 122, a first servo drive 123, and a first stepping sensor 124. The control device is electrically connected to the first servo drive and the first stepping sensor. With the above-mentioned components, the printed film advances along the first pulling path, and the first stepping sensor is disposed in a moving area where the printed film physically recovers, preventing a situation in which the printed film is pulled and a sensing error of the first stepping sensor occurs.

Description

[Technical Field]

[0001] The present invention relates to the technical field of processing equipment, and more particularly to an apparatus for solving the problem of shrinkage of plastic film in the upper and lower pattern alignment units of a bag making machine. [Background technology]

[0002] In the manufacturing method of packaging bags (self-standing bags), in order to increase production capacity and reduce labor costs, many of them use automatic processing modes to improve production efficiency.

[0003] There are two known embodiments of manufacturing equipment for packaging bags (self-standing bags) (see FIGS. 4 to 6).

[0004] In the first embodiment, a large-sized print film A is folded, and then the folded print film A1 is heat-sealed.

[0005] In the second embodiment, the folded printed film A1 is cut into separate upper and lower printed films A11 and A12, and the upper and lower printed films A11 and A12 are stacked together before heat-sealing. The individual operating methods are briefly described below.

[0006] In a first embodiment (see Figures 4 and 6), most of the automatic bag making equipment includes the following several parts: a folding mechanism 91 for forming a folded printed film A1 from the printed film A, an alignment mechanism 92 for transferring the folded printed film A1 to align it, and a heat sealing mechanism 93 for sealing the folded printed film A1 into a packaging bag.

[0007] A processing flowchart for the automatic bag making equipment will be briefly explained. First, the folding mechanism 91 continuously pulls out the printed film A at a constant speed, folding the printed film A, on which the positioning pattern A01 is printed, along the middle to form a folded printed film A1, and then moves it through a first path provided in the alignment mechanism 92. The folded printed film A1 is gradually formed by the first servo 921 and fed to the heat sealing mechanism 93 at the rear end, and specific positions on the folded printed film A1 are sealed to complete the packaging bag.

[0008] In the second embodiment (see Figures 5 and 6), most of the automatic bag making equipment includes the following several parts: a folding mechanism 91 for forming a folded printed film A1 from the printed film A, a cutting mechanism 94 for cutting the folded printed film A1 to form an upper printed film A11 and a lower printed film A12, an alignment mechanism 92 for aligning the cut upper printed film A11 and lower printed film A12, and a heat sealing mechanism 93 for sealing the stacked upper printed film A11 and lower printed film A12 into a packaging bag.

[0009] The processing flowchart of the automatic bag making equipment is as follows: First, the folding mechanism 91 continuously and uniformly pulls out the printed film A, on which the positioning pattern A01 is printed, and folds the printed film A along its middle to form a folded printed film A1. The cutting mechanism 94 cuts the folded printed film A1 into two separate upper and lower printed films A11 and A12, which pass through the first and second paths provided in the alignment mechanism 92, respectively. The upper and lower printed films A11 and A12 are gradually fed by the first and second servos 921 and 922 to the heat sealing mechanism 93, where specific positions on the upper and lower printed films A11 and A12 are synchronously sealed to complete the packaging bags. Summary of the Invention [Problem to be solved by the invention]

[0010] However, when implementing the above-mentioned structure, there are some drawbacks as follows: For example, in the first embodiment, in the process of folding the printed film A by the folding mechanism 91 and then moving it to enter along the first path provided in the alignment mechanism 92, the traction force of the first servo 921 is combined with the sensing of the first sensor 931 to achieve the purpose of the first servo 921 gradually transporting the folded printed film A1 to the rear end heat-sealing mechanism 93.

[0011] Before the folded printed film A1 passes through the first servo 921, both ends of the folded printed film A1 in the stretching direction are subjected to tensile forces in two directions, such as those of the folding mechanism 91 and the first servo 921, and the folded printed film A1 is pulled so as to deform. After the folded printed film A1 passes through the first servo 921, the tensile force is released and the film begins to physically shrink.

[0012] Since the first sensor 931 is positioned in a position before the feed end of the first servo 921, it measures the folded printed film A1 that has been pulled and deformed by force, so if the first servo 921 is made to refer to the gradual process, a deviation will occur from the position where the folded printed film A1 enters the rear end heat sealing mechanism 93 (physical retraction).

[0013] In the past, the printing film A was made of a single material and was folded as a whole, which limited the overall deformation amount, but this was overcome by users making on-site adjustments.However, due to the diversity of the traditional printing film A, the deformation amount continues to increase, and the number of adjustments required by users also increases, resulting in increased labor costs and defect rates.

[0014] In addition, in the second embodiment, during the process in which the folded printed film A1 is cut by the cutting mechanism 94 into independent upper printed film A11 and lower printed film A12, which then move along the first and second paths provided in the automatic bag making equipment, respectively, the first servo 921 and the second servo 922 provide traction forces to the upper printed film A11 and the lower printed film A12, respectively, and the first sensor 931 and the second sensor 932 are combined to sense the upper printed film A11 and the lower printed film A12, thereby achieving the requirement that the first servo 921 and the second servo 922 gradually transport the upper printed film A1 and the lower printed film A2.

[0015] Therefore, the inventors of the present invention believed that the above drawbacks could be improved, and after extensive research, they came up with the present invention, which effectively improves the above issues through rational design.

[0016] The present invention was developed through intensive research by the inventor in consideration of the above problems, and its purpose is to provide an apparatus that solves the problem of plastic film shrinkage in the upper and lower pattern alignment units of a bag making machine. [Means for solving the problem]

[0017] In order to achieve the above object, one aspect of the present invention is a device for solving the shrinkage problem of plastic films in the upper and lower pattern alignment units of a bag making machine, which is used to pull the folded printed film output from the folding mechanism and gradually transfer it to the heat sealing mechanism, a frame disposed between the folding mechanism and the heat-sealing mechanism; an output roller set mounted on the frame adjacent to the heat-sealing mechanism for guiding the folded print film into the heat-sealing mechanism; a first traction path disposed along the extension direction of the frame for transporting the folded print film to the output roller set, a plurality of first idler pulleys mounted at predetermined locations on the frame for transporting and guiding the folded print film for movement along the first traction path; a first tension buffer device mounted on the frame and disposed between the folding mechanism and the first servo drive, for providing an appropriate buffer for the incoming folded print film; a first servo drive mounted at a predetermined location on the frame and operating based on a first servo drive signal, the first servo drive being used to continuously pull the folded printing film passing through the first tension buffer device and outputting the folded printing film passing through the first servo drive in an incremental manner; a first traction path including a first stepping sensor mounted at a default position of the frame, disposed at an output end of the first servo drive, sensing the folded print film passing through the first servo drive and outputting a first sensing signal; and a control device electrically connected to the first servo drive and the first stepping sensor, respectively, for selectively outputting the first servo drive signal based on the received first sensing signal.

[0018] In order to achieve the above object, another aspect of the present invention is a device for solving the problem of shrinkage of plastic films in the upper and lower pattern alignment units of a bag making machine, which is used to pull the upper printed film and the lower printed film output by the cutting mechanism and gradually advance them to the heat sealing mechanism, a frame disposed between the cutting mechanism and the heat-sealing mechanism; an output roller set mounted on a frame adjacent to the heat-sealing mechanism, for guiding the upper printed film and the lower printed film to enter the heat-sealing mechanism and stacking them; a second traction path disposed on an upper part of the frame along the extending direction of the frame for transporting the upper printed film to the output roller set; a plurality of second idler pulleys mounted at predetermined locations on the frame for transporting and guiding the upper printing film for movement along the second traction path; a second servo drive mounted at a predetermined position on the upper section of the frame corresponding to the output end of the cutting mechanism and operating based on a second servo drive signal, for continuously pulling the upper printed film output by the cutting mechanism and for gradually outputting the upper printed film passing through the second servo drive; a second stepping sensor mounted at a default position on the frame, disposed between the second servo drive and the output roller set, for sensing the gradually moving upper printing film and outputting a second sensing signal; a second traction path including a second tension buffer device mounted at a default location on the upper section of the frame and disposed between the output roller set and the second stepping sensor, for providing an appropriate buffer for the gradually entering upper printing film; a third pulling path disposed at a lower part of the frame along the extending direction of the frame, for transporting the lower printed film to enter and proceed toward the output roller set; a plurality of third idler pulleys mounted at predetermined locations on the lower section of the frame for transporting and guiding the lower printing film along the third traction path; a third servo drive, which is installed at a predetermined position on the lower part of the frame corresponding to the output end of the cutting mechanism and operates based on a third servo drive signal, for pulling the lower printed film output by the cutting mechanism and for gradually outputting the lower printed film entering the third servo drive; a third stepping sensor mounted at a default position on the frame, disposed between the third servo drive and the output roller set, for sensing the gradually moving lower printing film and outputting a third sensing signal; a third traction path including a third tension buffer device mounted at a default location on the lower section of the frame and disposed between the output roller set and the third stepping sensor, for providing an appropriate buffer for the gradually entering lower printing film; and a control device electrically connected to the second servo drive, the third servo drive, the second stepping sensor, and the third stepping sensor, respectively, for selectively outputting the second servo drive signal and the third servo drive signal based on the received second sensing signal and the third sensing signal. [Effects of the Invention]

[0019] The present invention is configured as described above and therefore has the following advantages. The printing film, which is made up of the above-mentioned components, moves along a first traction path, and the first stepping sensor is positioned in the moving area where the printing film physically recovers, thereby preventing a situation in which the printing film is pulled and a sensing error of the first stepping sensor occurs.

[0020] At least the following points will become clear from the description and drawings to be described later. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a schematic view showing a bag making machine according to an embodiment of the present invention; [Figure 2] 2 is a schematic diagram illustrating the electrical connections of a control device according to an embodiment of the present invention; [Figure 3] 10 is a schematic view showing a bag making machine according to another embodiment of the present invention. [Figure 4] FIG. 1 is a schematic diagram (1) showing a transmission device of an alignment device of a conventional bag making machine. [Figure 5] FIG. 2 is a schematic diagram (II) showing a transmission device of an alignment device of a conventional bag making machine. [Figure 6] FIG. 1 is a schematic diagram showing a printed film of a conventional bag making machine. DETAILED DESCRIPTION OF THE INVENTION

[0022] Below, we will explain embodiments of an apparatus for solving the problem of plastic film shrinkage in the upper and lower pattern alignment units of a bag making machine of the present invention with reference to the drawings. However, the present invention is not limited to these embodiments, and the components, materials, etc. described below can be modified in various ways within the scope of the present invention. In the examples, various different objects are described based on the ratio, size, deformation, or displacement applied to the description, and not based on the actual ratio of the components. In the following examples, identical or symmetrically arranged components are all denoted by the same reference numerals. In the descriptions of each example described in this specification, directional terms such as "front, back, left, right, top, bottom, inside, outside," etc., are used based on the directions in the specified drawings and should not be construed as limitations on the present invention.

[0023] 1, 2, and 6, an alignment device 100 for a bag making machine includes a frame 10, an output roller set 20, a first pulling path, and a control device 30. The alignment device 100 pulls the folded printed film A1 output by the folding mechanism 91 so that it moves in an inward direction, gradually moving the folded printed film A1 to the heat sealing mechanism 93.

[0024] The frame 10 has an outer shape with a predetermined contour, and is disposed between the folding mechanism 91 and the heat-sealing mechanism 93. The output roller set 20 is mounted on the frame 10 adjacent to the heat-sealing mechanism 93, and is disposed at the discharge end of the frame 10 in the stretching direction, and guides the folded printed film A1 to enter the heat-sealing mechanism 93.

[0025] The first traction path is arranged along the extension direction of the frame 10 and is used to transport the folded printed film A1 output by the folding mechanism 91 to the output roller set 20, and is defined by and includes a plurality of first idler pulleys 121, a first tension buffer device 122, a first servo drive 123, and a first stepping sensor 124.

[0026] Each of the first idler pulleys 121 is mounted at a predetermined location on the frame 10 along the first traction path and is used to transport and guide the folded printing film A1 to move along the first traction path.

[0027] The first tension buffer device 122 is mounted on the frame 10 and positioned adjacent to the output end of the folding mechanism 91 to receive the folded printed film A1 output by the folding mechanism 91 and to provide an appropriate buffer for the incoming folded printed film A1.

[0028] The first servo drive 123 is mounted at a predetermined position on the frame 10 and operates based on a first servo drive signal to pull the folded printing film A1 passing through the first tension buffer device 122 and to output the folded printing film A1 passing through the first servo drive 123 in a progressive form.

[0029] The first stepping sensor 124 is installed at a default position on the frame 10 and is disposed at the output end of the first servo drive 123. The first stepping sensor 124 is used to sense the folded printed film A1 that has passed through the first servo drive 123, obtain the positioning pattern A01 on the folded printed film A1, and output a first sensing signal.

[0030] The control device 30 is electrically connected to the first servo drive 123 and the first stepping sensor 124, and selectively outputs a first servo drive signal based on the received first sensing signal.

[0031] The above has been a description of the transmission, components, and assembly method of the alignment device 100 for a bag making machine according to a preferred embodiment of the present invention. Next, the operational features of this embodiment of the present invention will be described.

[0032] Known prior art relates to how to align the pattern on the folded printed film A1 after folding the alignment device 100. In many cases, a guide module is used to output the folded printed film A1 folded by the folding mechanism 91 and transport it while maintaining vertical alignment. In the upstream section of the first servo drive 123, the folded printed film A1 is maintained to move continuously and stably along the first traction path (upstream section). After passing through the first servo drive 123, it is shifted to move gradually along the first traction path (rear section), enter the output roller set 20, and then proceed to the heat-sealing mechanism 93.

[0033] Of course, in the above process, the first traction path may be provided with a punching mechanism, a bottom folding mechanism B, etc., as needed, and this is not the focus of the present invention, so the description thereof will not be repeated here.

[0034] The operation of the alignment device 100 of the present invention will now be described in further detail. The folded printed film A1 output from the folding mechanism 91 travels along the first traction path through the first idler pulleys 121, the first tension buffer device 122, the first servo drive 123, and the first stepping sensor 124, before passing through the output roller set 20 and on to the rear heat-sealing mechanism 93.

[0035] In the above process, the first stepping sensor 124 senses the positioning pattern A01 on the folded printed film A1 and outputs a first sensing signal to the control device 30. Based on the first sensing signal, the control device 30 selectively outputs a first servo drive signal to the first servo drive 123, so that the first servo drive 123 moves the folded printed film A1 along the first traction path in an incremental manner.

[0036] The present invention is characterized in that since the first stepping sensor 124 is arranged at the output end of the first servo drive 123 along the first traction path, when the folded printed film A1 moving along the first traction path reaches the stage of being physically unwound, there is no risk of it being pulled and deformed by force, the first stepping sensor 124 can accurately acquire the positioning pattern A01 on the folded printed film A1, ensure the feed rate of the operation of the first servo drive 123, and the rear end heat sealing mechanism 93 can accurately correspond to the default position of the folded printed film A1 to perform heat sealing processing.

[0037] This prevents the folded print film A1 from being pulled, causing the first stepping sensor 124 to be unable to sense the positioning pattern A01 during its operation, which may result in equipment stoppage.

[0038] 2 and 3 show another embodiment of the present invention, in which a cutting mechanism 94 (prior art) is further connected in series between a folding mechanism 91 (prior art) and an alignment device 100. The folded printed film A1 output by the folding mechanism 91 is cut into separate upper and lower printed films A11 and A12 (prior art), and the upper and lower printed films A11 and A12 are respectively fed into the alignment device 100.

[0039] To align the upper printed film A11 and the lower printed film A12, the alignment device 100 of the present invention further includes a second and a third traction path in addition to the frame 10, the output roller set 20, and the control device 30. The second and the third traction paths respectively move the upper printed film A11 and the lower printed film A12 to enter and align them, and gradually transfer the upper printed film A11 and the lower printed film A12 through the output roller set 20 to the heat sealing mechanism 93.

[0040] The frame 10 is disposed between the cutting mechanism 94 and the heat sealing mechanism 93 .

[0041] The second traction path is arranged on the upper level of the frame 10 along the extension direction of the frame 10, and is used to transport the upper printed film A11 to the output roller set 20, and is composed of a plurality of second idler pulleys 141, a second servo drive 142, a second stepping sensor 143, and a second tension buffer device 144.

[0042] Each of the second idler pulleys 141 is mounted at a predetermined position on the frame 10 along the second traction path, and transports and guides the upper printing film A11 to move along the second traction path.

[0043] The second servo drive 142 is installed at a predetermined position on the upper part of the frame 10 so as to correspond to the output end of the cutting mechanism 94, and is electrically connected to the control device 30. It operates based on the second servo drive signal, and is used to pull the upper printed film A11 output by the cutting mechanism 94 and to output the upper printed film A11 entering the second servo drive 142 in a progressive manner.

[0044] The second stepping sensor 143 is mounted at a default position on the frame 10, disposed between the second servo drive 142 (behind the output end) and the output roller set 20, and electrically connected to the control device 30. The second servo drive 142 senses the gradually transporting upper printing film A11 to obtain the positioning pattern A01 of the upper printing film A11. The second sensing signal is output to the control device 30, causing the control device 30 to selectively output a second servo drive signal.

[0045] The second tension buffer device 144 is installed at a default position on the upper stage of the frame 10, and is disposed between the output roller set 20 and the second stepping sensor 143 to provide an appropriate buffer for the gradually advancing upper printing film A11. By not synchronizing with the stroke of the rear end heat sealing mechanism 93, it prevents the upper printing film A11 from being excessively pulled or shrunk.

[0046] The third traction path is arranged at the lower level of the frame 10 along the extension direction of the frame 10, and is used to transport the lower printed film A12 output by the cutting mechanism 94 so that it enters the output roller set 20 and continues on, and is composed of a plurality of third idler pulleys 161, a third servo drive 162, a third stepping sensor 163, and a third tension buffer device 164.

[0047] Each of the third idler pulleys 161 is mounted at a predetermined location on the lower section of the frame 10 along the third traction path and is used to transport and guide the lower printing film A12 to move along the third traction path.

[0048] The third servo drive 162 is installed at a predetermined position on the lower part of the frame 10 so as to correspond to the output end of the cutting mechanism 94, and is electrically connected to the control device 30. It operates based on a third servo drive signal to pull the lower printed film A12 output by the cutting mechanism 94 and to output the lower printed film A12 entering the third servo drive 162 in a progressive manner.

[0049] The third stepping sensor 163 is installed in a default position on the frame 10, disposed between the third servo drive 162 (behind the output end) and the output roller set 20, and electrically connected to the control device 30. It senses the lower printing film A12 that is gradually transported by the third servo drive 162, obtains the positioning pattern A01 of the lower printing film A12, and outputs a third sensing signal to the control device 30, causing the control device 30 to selectively output a third servo drive signal.

[0050] The third tension buffer device 164 is installed in a default location on the lower level of the frame 10 and is positioned between the output roller set 20 and the third stepping sensor 163 to provide an appropriate buffer for the gradually entering lower printing film A12, and is not synchronized with the stroke of the rear end heat sealing mechanism 93, thereby preventing the lower printing film A12 from being excessively pulled or shrinking.

[0051] The printed film A, which is made up of the above-mentioned components, is first folded by the folding mechanism 91 to form a folded printed film A1, which is then separated into an upper printed film A11 and a lower printed film A12 by the cutting mechanism 94. The upper printed film A11 travels along the second traction path and enters each of the second idler pulleys 141, the second servo drive 142, the second stepping sensor 143, and the second tension buffer device 144, and then gradually advances to the output roller set 20, after which it passes through the output roller set 20 and is output to the heat sealing mechanism 93.

[0052] The lower printed film A12 travels along the third traction path, entering each third idler pulley 161, third servo drive 162, third stepping sensor 163, and third tension buffer device 164, gradually advancing to the output roller set 20, then pairs up with the upper printed film A11, passes through the output roller set 20 in synchronization, and is output to the heat sealing mechanism 93.

[0053] In the above process, the second stepping sensor 164 and the third stepping sensor 163 respectively sense the positioning patterns A01 on the upper printed film A11 and the lower printed film A12, and output second and third sensing signals to the control device 30. Based on the second and third sensing signals, the control device 30 selectively outputs second and third servo drive signals to the second and third servo drives 142 and 162, which in turn output the upper printed film A11 and the lower printed film A12 in a progressive manner to move along the second and third pulling paths, respectively, and stack and align them on the output roller set 20, after which the rear end heat sealing mechanism 93 accurately performs heat sealing.

[0054] In the above operation, since the second stepping sensor 164 and the third stepping sensor 163 are respectively disposed at the output ends of the second servo drive 142 and the third servo drive 162, when the upper printing film A11 and the lower printing film A12 are both in the stage of being physically released, there is no risk of them being pulled and deformed by force. Therefore, the second stepping sensor 164 and the third stepping sensor 163 accurately obtain the positioning patterns A01 on the upper printing film A11 and the lower printing film A12, ensuring the feed rate of the operation of the second servo drive 142 and the third servo drive 162, and allowing the rear end heat sealing mechanism 93 to accurately perform heat sealing according to the default positions of the upper printing film A11 and the lower printing film A12.

[0055] The above description is for the purpose of explaining the present invention, and should not be construed as limiting or narrowing the scope of the invention described in the claims. Furthermore, the configuration of each part of the present invention is not limited to the above embodiment, and various modifications are possible within the technical scope described in the claims. [Explanation of symbols]

[0056] 100 Alignment Device 10 frames 121 No. 1 idler pulley 122 First tension buffer device 123 First Servo Drive 124 First stepping sensor 141 Second idler pulley 142 Second servo drive 143 Second stepping sensor 144 Second tension buffer device 161 Third idler pulley 162 3rd servo drive 163 3rd stepping sensor 164 Third tension buffer device 20 Output Roller Set 30 Control device 91 Folding mechanism 92 Alignment mechanism 921 1st Servo 922 Second Servo 93 Heat sealing mechanism 931 First Sensor 932 Second Sensor 94 Cutting mechanism A. Printed film A01 Positioning pattern A1 folded printing film A11 Upper printing film A12 Bottom Printing Film B Bottom folding mechanism

Claims

1. A device for solving the shrinkage problem of plastic films in upper and lower pattern alignment units of a bag making machine, which is used to pull folded printed films outputted from a folding mechanism and gradually transfer them to a heat sealing mechanism, comprising: a frame disposed between the folding mechanism and the heat-sealing mechanism; an output roller set mounted on the frame adjacent to the heat-sealing mechanism for guiding the folded print film into the heat-sealing mechanism; a first towing path disposed along the extension direction of the frame for transporting the folded printed film to the output roller set, a plurality of first idler pulleys mounted at predetermined locations on the frame for transporting and guiding the folded print film for movement along the first traction path; a first tension buffer device mounted on the frame and disposed between the folding mechanism and the first servo drive, for providing an appropriate buffer for the incoming folded print film; a first servo drive mounted at a predetermined location on the frame and operating based on a first servo drive signal, the first servo drive being used to continuously pull the folded printing film passing through the first tension buffer device and outputting the folded printing film passing through the first servo drive in an incremental manner; a first traction path including a first stepping sensor mounted at a default position of the frame, disposed at an output end of the first servo drive, sensing the folded print film that has passed the first servo drive, and outputting a first sensing signal; a control device electrically connected to the first servo drive and the first stepping sensor, respectively, for selectively outputting the first servo drive signal based on the received first detection signal.

2. This device solves the problem of shrinkage of plastic films in the upper and lower pattern alignment units of a bag making machine, which is used to pull the upper and lower printed films output by the cutting mechanism and gradually advance them to the heat sealing mechanism, a frame disposed between the cutting mechanism and the heat-sealing mechanism; an output roller set mounted on a frame adjacent to the heat-sealing mechanism, for guiding the upper printed film and the lower printed film to enter the heat-sealing mechanism and stacking them; a second traction path disposed on an upper part of the frame along the extending direction of the frame for transporting the upper printed film to the output roller set; a plurality of second idler pulleys mounted at predetermined locations on the frame for transporting and guiding the upper printing film for movement along the second traction path; a second servo drive mounted at a predetermined position on the upper section of the frame corresponding to the output end of the cutting mechanism and operating based on a second servo drive signal, for continuously pulling the upper printed film output by the cutting mechanism and for gradually outputting the upper printed film passing through the second servo drive; a second stepping sensor mounted at a default position on the frame, disposed between the second servo drive and the output roller set, for sensing the gradually moving upper printing film and outputting a second sensing signal; a second traction path including a second tension buffer device mounted at a default location on the upper section of the frame and disposed between the output roller set and the second stepping sensor, for providing an appropriate buffer for the gradually advancing upper printing film; a third pulling path disposed at a lower part of the frame along an extension direction of the frame, for transporting the lower printed film so as to enter and proceed toward the output roller set; a plurality of third idler pulleys mounted at predetermined locations on the lower section of the frame for transporting and guiding the lower printing film along the third traction path; a third servo drive, mounted at a predetermined position on the lower section of the frame corresponding to the output end of the cutting mechanism and operating based on a third servo drive signal, for pulling the lower printed film output by the cutting mechanism and for gradually outputting the lower printed film entering the third servo drive; a third stepping sensor mounted at a default position on the frame, disposed between the third servo drive and the output roller set, for sensing the gradually moving lower printing film and outputting a third sensing signal; a third traction path including a third tension buffer device mounted at a default location on the lower section of the frame and disposed between the output roller set and the third stepping sensor, for providing an appropriate buffer for the gradually entering lower printing film; a control device electrically connected to the second servo drive, the third servo drive, the second stepping sensor, and the third stepping sensor, respectively, and selectively outputting the second servo drive signal and the third servo drive signal based on the received second sensing signal and the third sensing signal.

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