Heat sealer

Abstract

This invention relates to a heat sealing machine. The heat sealing machine is used to seal multiple individual trays (300) with a plastic film (400), and is configured to create a vacuum between the trays (300) and the plastic film (400). The heat sealing machine includes: an upper sealing assembly (20) and a lower sealing assembly (10) movable relative to the upper sealing assembly (20); a vacuum chamber (1020) defined between the lower sealing assembly (10) and the upper sealing assembly (20), which is created upon mating; and an extraction circuit (14). The lower sealing assembly (10) includes a tray frame (11) having multiple tray cavities, each tray cavity configured to receive a corresponding tray (300), and the vacuum chamber (1020) is defined between the tray frame (11) and the upper sealing assembly (20).

Description

Technical Field

[0001] This invention relates to a heat sealing machine. Background Technology

[0002] In a heat sealing machine, products are packaged into a tray by sealing a plastic film onto it. This type of heat sealing machine includes a lower sealing assembly and an upper sealing assembly that face each other and are configured to engage with each other to perform a seal. The lower sealing assembly can move between a rest position and a mating position. In the rest position, the lower sealing assembly is vertically spaced from the upper sealing assembly. In the mating position, the lower sealing assembly engages with the upper sealing assembly to perform a seal.

[0003] With the lower sealing assembly in the stationary position, a pallet containing the products to be packaged is received in the lower sealing assembly. Subsequently, the lower sealing assembly moves to the mating position to seal the pallet and thus obtain the packaged products.

[0004] The lower sealing assembly also includes a support plate for each pallet it can receive. The support plate ensures that the pallet is positioned above the lower sealing assembly at least when the lower sealing assembly is in a stationary position, allowing the tool to easily place the pallet on the lower sealing assembly and to pick it up after the product has been packaged. The lower sealing assembly also includes a pallet positioner configured to cooperate with the support plate to position the pallet in this way, at least when the lower sealing assembly is in a stationary position.

[0005] Sometimes it is necessary to apply a vacuum between the tray and the plastic film (in the space where the product to be packaged is located), and some heat sealers are configured to perform this vacuum. These heat sealers include an extraction circuit that connects this space to a gas extraction source.

[0006] US2020346801A1 discloses a heat sealing machine configured to apply a vacuum. The lower sealing assembly includes: a tray frame defining a plurality of tray cavities, each configured to receive a corresponding tray; a lower base spaced vertically from and attached to the tray frame; a corresponding support plate for each tray; and a tray positioner disposed below the tray frame. In this heat sealing machine, a vacuum can be generated above a vacuum chamber including the tray cavities, and a vacuum is generated when the lower sealing assembly is in a mating position. The heat sealing machine includes an extraction circuit in fluid communication between a gas extraction source and the vacuum chamber. Summary of the Invention

[0007] The purpose of this invention is to provide a heat sealing machine.

[0008] This heat sealer is suitable for sealing multiple individual trays with plastic film and is configured to create a vacuum between the tray and the plastic film before sealing.

[0009] The heat sealing machine includes: a sealing station having a lower sealing assembly and an upper sealing assembly facing each other in a vertical direction; a lifting mechanism configured to move the lower sealing assembly between a rest position and a mating position, wherein in the rest position the lower sealing assembly and the upper sealing assembly are spaced apart, and in the mating position the lower sealing assembly and the upper sealing assembly are mated together, thereby creating a vacuum chamber defined between the lower sealing assembly and the upper sealing assembly; and an extraction circuit that fluidly connects a gas extraction source to the vacuum chamber when the lower sealing assembly is in the mating position.

[0010] The lower sealing assembly includes: a tray frame defining a plurality of tray cavities, each configured to receive a corresponding tray; a lower base spaced vertically from the tray frame and attached to the lifting mechanism and the tray frame; a corresponding support plate for each tray cavity, each support plate including a support base configured to support a tray and a support rod attached to the support base; and a tray positioner disposed below the tray frame and configured to cooperate with the support rod to simultaneously position all trays supported on the corresponding support bases of the support plates above the tray frame when the lower sealing assembly is in the stationary position, for ease of operation. The support rod extends from the corresponding support base, through the tray frame, toward the tray positioner.

[0011] The tray frame is configured such that a vacuum chamber is defined between the tray frame and the upper sealing assembly, with a tray cavity within the vacuum chamber. A support plate is associated with the tray frame such that, with the lower sealing assembly in the mating position, a support base rests on the tray frame, and the support plate is accommodated within a corresponding tray cavity within the vacuum chamber. This means that at least the portion of the support rod that mates with the plate locator is outside the vacuum chamber, and the mating between the plate locator and the support plate is therefore performed outside the vacuum chamber.

[0012] The lower base is configured to be connected to the gas extraction source, and the extraction circuit includes at least one connecting conduit disposed between the tray frame and the lower base for fluid communication of the vacuum chamber with the gas extraction source via the lower base when the lower base is connected to the gas extraction source.

[0013] Due to this heat-sealing machine configuration, the support plate retains its function of positioning the pallet above the pallet frame when needed, while the volume of air extracted by the gas extraction source is significantly reduced (by reducing the volume of the vacuum chamber). In the prior art, the vacuum chamber includes not only the space around the pallet, as in the case of the proposed heat-sealing machine, but also the space below the pallet frame, in which the plate positioner attached to the support plate is located. This reduction achieved in the proposed heat-sealing machine means that less air must be expelled when performing a vacuum in the vacuum chamber, which greatly reduces the time required to perform the vacuum and thus the time required to perform the corresponding product packaging process. Furthermore, in the proposed heat-sealing machine, the type of pallet (of different heights or flat) on which the plastic film will be sealed can be easily modified, because if necessary, only the pallet frame and the support plate can be replaced without modifying or replacing the entire lower sealing assembly, thus allowing for a more versatile heat-sealing machine at a lower cost.

[0014] These and other advantages and features of the invention will become apparent from the accompanying drawings and the detailed description of the invention. Attached Figure Description

[0015] Figure 1 An embodiment of the heat sealing machine according to the present invention is shown.

[0016] Figure 2 It shows Figure 1 The sealing station of the heat sealing machine, in which the lower sealing assembly is in a stationary position.

[0017] Figure 3 It shows Figure 1 The sealing station of the heat sealing machine, in which the lower sealing component is in the mating position.

[0018] Figure 4 Details of the vacuum circuit of an embodiment of the heat-sealing machine of the present invention, suitable for packaging products in flat pallets, are shown.

[0019] Figure 5 Details of the vacuum circuit of an embodiment of the heat-sealing machine of the present invention, suitable for packaging products in a tray of a given height, are shown.

[0020] Figure 6 A sealing station of another embodiment of the heat sealing machine of the present invention is shown, wherein the lower sealing assembly is in a stationary position.

[0021] Figure 7 It shows Figure 2 The lower sealing assembly of the sealing station is positioned during its travel to the mating position, in which the support plate rests on the corresponding cavity base of the tray cavity of the tray frame of the lower sealing assembly and is supported on the platform of the plate locator.

[0022] Figure 8 It shows Figure 2 The lower sealing assembly of the sealing station is positioned during its travel to the mating position, where the support plate rests on the cavity base of the tray cavity and is separated from the platform of the plate locator. Detailed Implementation

[0023] like Figure 1 As shown in the example, heat sealer 100 is used to package product P. Heat sealer 100 is adapted to seal multiple trays 300 with plastic film 400 and to create a vacuum between the trays 300 and the plastic film 400 (before sealing).

[0024] The heat sealing machine 100 includes: a sealing station 3 having a lower sealing assembly 10 and an upper sealing assembly 20 facing each other in the vertical direction; and a lifting mechanism 1000 configured to keep the lower sealing assembly 10 in a rest position Pr (see [link to product]). Figure 2 ) and mating position Pc (see Figure 3 The lower sealing assembly 10 (showing further details of the upper sealing assembly 20) moves between the two. In the rest position Pr, the lower sealing assembly 10 is vertically spaced from the upper sealing assembly 20. In the mating position Pc, the lower sealing assembly 10 and the upper sealing assembly 20 mate (no longer vertically spaced), allowing the aforementioned vacuum and sealing to be performed. The heat sealer 100 also includes an extraction circuit 14 that fluidly communicates a gas extraction source (not shown and located in the facility where the heat sealer 100 is located) with the vacuum chamber 1020 when the lower sealing assembly 10 is in the mating position Pc (when the heat sealer 100 is connected to the gas extraction source), thus allowing a vacuum to be created above the vacuum chamber 1020.

[0025] The lower sealing assembly 10 includes: a tray frame 11 defining a plurality of tray cavities 11.1, each tray cavity 11.1 configured to receive a corresponding tray 300; and a lower base 10.1 vertically spaced from (and disposed below) the tray frame 11, and attached to the tray frame 11 by at least one support 11.4, such that the tray frame 11.1 and the lower base 10.1 move together between a rest position Pr and a mating position Pc. Preferably, a lifting mechanism 1000 is attached to the lower base 10.1 (see, for example, [reference needed]). Figure 2 and Figure 3 The force acts directly on the lower base 10.1 to cause displacement of the lower sealing assembly 10. When the vacuum chamber 1020 is generated, the tray cavity 11.1 is located within the vacuum chamber 1020.

[0026] The lower sealing assembly 10 also includes a corresponding support plate 13 for each tray cavity 11.1 and a tray positioner 15 disposed below the tray frame 11. Each support plate 13 includes a support base 13.2 configured to support a tray 300 and a support rod 13.1 attached to the support base 13.2, the support rod 13.1 extending vertically from the support base 13.2, through the tray frame 11, toward the plate positioner 15. The tray frame 11 includes at least one sealing gasket (not shown) that mates with the support rod 13.1 to maintain the seal of the vacuum chamber 1020. The plate positioner 15 faces the support rod 13.1 and is configured to mate with the support rod 13.1 so that, when the lower sealing assembly 10 is in the rest position Pr, all trays 300 supported on the support base 13.2 of the corresponding support plate 13 are positioned above the tray frame 11 (further details of this mating are given below). This engagement occurs below the pallet frame 11 as the support rod 13.1 passes through it.

[0027] The support plate 13 is arranged in the pallet frame 11 and has freedom of movement relative to the pallet frame 11. Specifically, each support base 13.2 is associated with a corresponding pallet cavity 11.1 such that, without engagement between the support rod 13.1 and the pallet locator 15, the support base 13.2 rests on the pallet frame 11 within the vacuum chamber 1020, particularly the pallet frame 11, which is housed in the corresponding pallet cavity 11.1, and the support plate 13 moves together with the pallet frame 11 during the displacement of the lower sealing assembly 10 between the rest position Pr and the engagement position Pc. However, due to the degree of freedom of relative displacement, there is relative displacement between the support plate 13 and the pallet frame 11 when the support rod 13.1 and the plate locator 15 engage with each other.

[0028] The tray frame 11 is configured such that, with the lower sealing assembly 10.1 in the mating position Pc, the vacuum chamber 1020 is defined between the tray frame 11 and the upper sealing assembly 20. Figure 3 Therefore, the support base 13.2 of the support plate 13 is located inside the vacuum chamber 1020, the plate positioner 15 is located outside the vacuum chamber 1020, and the cooperation between the plate positioner 15 and the support rod 13.1 is performed outside the vacuum chamber 1020.

[0029] The lower base 10.1 is configured to connect to a gas extraction source, and the extraction circuit 14 includes at least one connecting conduit 14.0 disposed between the tray frame 11 and the lower base 10.1 (see [link]). Figure 4 and Figure 5The vacuum chamber 1020 is fluidly connected to the gas extraction source (via the lower base 10.1). Therefore, by connecting the tray frame 11 to the extraction circuit 14 via the connecting conduit 14.0, when the type of tray 300 used for packaging products needs to be changed (e.g., from a flat tray to a tray with a given height), the heat sealer 100 allows only the tray frame 11 to be replaced, without replacing the entire lower sealing assembly 10, resulting in a more versatile heat sealer 100. Furthermore, by eliminating the need to house the plate positioner 15 within the vacuum chamber 1020, the heat sealer 100 can also reduce the material of the lower sealing assembly 10 by eliminating the airtight box between the tray frame 11 and the lower base 10.1, resulting in a cheaper heat sealer 100. And by minimizing the size of the vacuum chamber 1020, the extraction circuit 14 requires less time to generate the required vacuum due to the reduced air volume contained in the lower sealing assembly 10, resulting in a faster heat sealer 100.

[0030] The extraction circuit 14 includes, at the lower base 10.1 of the lower sealing assembly 10, a first base port 14.1 for connection to a gas extraction source, a second base port 14.2 located on the surface facing the tray frame 11, and a base channel 14.3 fluidly communicating the first base port 14.1 and the second base port 14.2. Furthermore, the extraction circuit 14 includes: a frame port 14.4 in the tray frame 11, fluidly communicating with the second base port 14.2 via a connecting conduit 14.0 disposed between the tray frame 11 and the lower base 10.1; and a frame channel 14.5 fluidly communicating the frame port 14.4 with the vacuum chamber 1020. For example, the frame channel 14.5 may be formed by an internal notch in the tray frame 11 itself. The frame opening 14.4 is in fluid communication with the vacuum chamber 1020, thus allowing a vacuum to be generated above the vacuum chamber 1020, and the frame opening 14.4 is located on the lower surface 11.9 of the downward-facing sealing assembly 10 of the lower base 10.1 of the tray frame 11.

[0031] In some embodiments (not depicted in the figures), the extraction circuit 14 includes a single connecting conduit 14.0, and preferably, all tray cavities 11.1 are in communication with each other via frame channels 14.5. An internal notch in the tray frame 11 is in fluid communication with a first base port 14.1, such that the vacuum chamber 1020 is in communication with a gas extraction source via the tray cavity 11.1, the internal notch in the tray frame 11, the connecting conduit 14.0, and the lower base 10.1.

[0032] In other embodiments, the extraction circuit 14 includes a plurality of connecting conduits 14.0 and a second base port 14.2 and a frame port 14.4 for each connecting conduit 14.0. Each connecting conduit 14.0 is connected between a corresponding second base port 14.2 and a corresponding frame port 14.4. A base channel 14.3 is configured to fluidly communicate a first base port 14.1 with all second base ports 14.2. In some embodiments, the extraction circuit 14 includes a corresponding frame channel 14.5 associated with each connecting conduit 14.0. In other embodiments, the extraction circuit 14 includes frame channels 14.5 associated with connection groups formed by the plurality of connecting conduits 14.0, and the extraction circuit 14 includes a plurality of connection groups, i.e., in these embodiments, the extraction circuit 14 includes a plurality of frame channels 14.5, and each of the frame channels 14.5 is associated with a connection group. And in other embodiments, the extraction circuit 14 includes frame channels 14.5 associated with all connecting conduits 14.0.

[0033] The lower base 10.1 includes an upper block 10.11 and a lower block 10.12. The upper block 10.11 is attached to the pallet frame 11 (via at least one support member 11.4) and includes an upper surface 10.112 facing the pallet frame 11 and an opposing lower surface 10.111. The lower block 10.12 is attached to the lifting mechanism 1000 and includes an upper surface 10.121 that contacts the lower surface 10.111 of the upper block 10.11. The upper block 10.11 and the lower block 10.12 are separably engaged with each other, and the upper surface 10.112 of the upper block 10.11 includes a second base opening 14.2. At least one of the upper block 10.11 and lower block 10.12 of the lower base 10.1 includes a block groove 10.81 in a surface 10.111 or 10.121 facing the other block 10.11 or 10.12, and a base channel 14.3 is formed between the block groove 10.81 and the other block 10.11 or 10.12. This facilitates easy and quick replacement of desired components of the lower sealing assembly 10 when it is necessary to change the type of the pallet 300 to be packaged (flat pallet or pallet with height), the type of packaging (e.g., from a second outer skin or vacuum packaging performed by the lower sealing assembly 10 due to the extraction circuit 14 to modulated atmosphere packaging or packaging under atmospheric conditions), and / or the number of pallets 300 to be packaged. This fact allows the lower block 10.12 (which is attached to the lifting mechanism 1000 and can be attached to an air extraction source) and the lifting mechanism 1000 itself to be retained under any circumstances, thus making the heat sealer 100 compatible with other lower sealing assemblies. Replaceable parts of the lower sealing assembly 10 can be removed together.

[0034] In some embodiments of these examples, all tray cavities 11.1 communicate with each other via frame channels 14.5 of the tray frame 11; however, in other embodiments, this is not necessary, as different tray cavities 11.1 may also be accessed via different connecting conduits 14.0. Frame channels 14.5 are formed by at least one internal notch of the tray frame 11, and all tray cavities 11.1 are in fluid communication with said internal notch. In other embodiments, the tray frame 11 may include more than one internal notch, each internal notch in fluid communication with at least one corresponding connecting conduit 14.0, and all tray cavities 11.1 are in fluid communication with each other. The use of multiple connecting conduits 14.0 allows for better uniformity and acceleration of the vacuum.

[0035] In some embodiments, for packaging product P in a flat pallet 300, the pallet frame 11 includes a fixed frame 11.6 and a floating frame 11.5, the floating frame 11.5 facing upward toward the sealing assembly 20 and connected to the fixed frame 11.6 with vertical displacement capability. The floating frame 11.5 is configured such that when the lower sealing assembly 10 is in the rest position Pr (see [reference needed]). Figure 2 ) is spaced apart from the fixed frame 11.6, and the lower sealing assembly 10 is in the mating position Pc (see Figure 3 In the case of contact with the fixed frame 11.6, the frame channel 14.5 of the tray frame 11 is generated by this engagement.

[0036] like Figure 4 As shown, the floating frame 11.5 includes a recess 11.50 on its surface facing the fixed frame 11.6, and the fixed frame 11.6 includes a recess 11.60 on its surface facing the floating frame 11.5. The recess 11.60 at least partially faces the recess 11.50 of the floating frame 11.5. When the sealing assembly 10 is in the mating position Pc, a frame channel 14.5 is created between the recesses 11.50 and 11.60. The recess 11.50 of the floating frame 11.5 communicates with the tray cavity 11.1 below the support base 13.2. In other embodiments, for packaging product P in a tray 300 with height, the tray frame 11 does not include any floating frame (see [link to other embodiments]). Figure 5 and Figure 6 ).

[0037] In any embodiment of the heat sealing machine 100, the plate positioner 15 may include: a platform 15.0 facing a support rod 13.1 of the support plate 13 and disposed between the tray frame 11 and the lower base 10.1 of the lower sealing assembly 10; at least one positioner rod 15.1 (preferably multiple positioner rods 15.1) attached to the platform 15.0, the at least one positioner rod 15.1 extending from the platform 15.0 and passing through the lower base 10.1. Each tray cavity 11.1 includes a cavity base 11.11 (or surface) configured to support a corresponding support plate 13.2. With the lower sealing assembly 10 in the stationary position Pr, the platform 15.0 is spaced apart from the lower base 10.1 of the lower sealing assembly 10 by a platform distance A. The support rod 13.1 is supported on the platform 15.0, and the support base 13.2 of the support plate 13 is spaced apart from the corresponding cavity base 11.11 by a plate distance D. The tray 300 is thus raised (see...). Figure 2 With the lower sealing assembly 10 in the mating position Pc, the platform 15.0 contacts (or rests on) the lower base 10.1 of the lower sealing assembly 10, and the support base 13.2 of the support plate 13 rests on the cavity base 11.11, and the tray 300 does not rise (see...). Figure 3 ).

[0038] Preferably, all support rods 13.1 have the same length and all locator rods 15.1 have the same length, and these lengths are selected such that during the travel of the lower sealing assembly 10 from the rest position Pr to the mating position Pc, the distance (height) traveled by the lower base 10.1 relative to the plate locator 15 is greater than the distance traveled by the cavity base 11.11 to the support base 13.2 (i.e., the platform distance A is greater than the plate distance D). This means that during the travel of the lower sealing assembly 10 from the rest position Pr to the mating position Pc, the support base 13.2 rests on the cavity base 11.11 before the lower base 10.1 contacts the platform 15.0 (see...). Figure 7 Thus, support rod 13.1 separates from platform 15.0 (see...) Figure 8 And the tray 300 and the lower sealing assembly 10 move together to the mating position Pc.

[0039] The lower sealing assembly 10 is configured to move a distance greater than the platform distance A from the rest position Pr to the mating position Pc, such that once it has traveled a distance equal to the plate distance D, the support plate 13 moves together with the lower sealing assembly 10 until the mating position Pc, the support rod 13.1 is spaced apart from the platform 15.0, and once it has traveled a distance greater than the platform distance A, the platform 15.0 moves together with the lower sealing assembly 10 until the lower sealing assembly 10 reaches the mating position Pc, the locator rod 15.1 is spaced apart from the static structure 100.1.

[0040] With the lower sealing assembly 10 in the rest position Pr, the positioner rod 15.1 is supported on the static structure 100.1 of the heat sealer 100, which is arranged below the lower base 10.1 of the lower sealing assembly 10 and forms part of the frame 101 of the heat sealer 100. The support rods 13.1 are of such length that, with the lower sealing assembly 10 in the rest position Pr, they are supported on the platform 15.0 of the plate positioner 15, such that the tray 300 supported by the support plate 13 is positioned above the tray frame 11 as described above and is easily maneuverable (so that once the products P are packaged, they can be removed from the sealing station 3 and new trays 300 can be placed in the sealing station 3). The support rods 13.1 are vertically spaced from the platform 15.0 when the lower sealing assembly 10 is in the mating position Pc, to allow the tray 300 to be received in the tray cavity 11.1 and to allow proper packaging of the products P.

[0041] The locator rod 15.1 has such a length that when the lower sealing assembly 10 is in the rest position Pr, the locator rod 15.1 is supported on the static structure 100.1, and when the lower sealing assembly 10 is in the mating position Pc, the platform 15.0 is supported on the lower base 10.1 of the lower sealing assembly 10, and the locator rod 15.1 is vertically spaced from the static structure 100.1.

Claims

1. A heat sealing machine for sealing a plurality of individual trays (300) with a plastic film (400), and the heat sealing machine is configured to perform a vacuum between the trays (300) and the plastic film (400), the heat sealing machine (100) comprising: A sealing station (3) having a lower sealing assembly (10) and an upper sealing assembly (20) facing each other in the vertical direction. A lifting mechanism (1000) is configured to move the lower sealing assembly (10) between a rest position (Pr) and a mating position (Pc), wherein in the rest position (Pr), the lower sealing assembly (10) and the upper sealing assembly (20) are vertically spaced apart, and in the mating position (Pc), the lower sealing assembly (10) and the upper sealing assembly (20) mate with each other, thereby creating a vacuum chamber (1020) defined between the lower sealing assembly (10) and the upper sealing assembly (20); and Extraction circuit (14) fluidly connects the gas extraction source to the vacuum chamber (1020) when the lower sealing assembly (10) is in the mating position (Pc). The lower sealing assembly (10) includes: A tray frame (11) defines a plurality of tray cavities (11.1), each tray cavity (11.1) being configured to receive a corresponding tray (300). The lower base (10.1) is vertically spaced from the pallet frame (11) and is attached to the lifting mechanism (1000) and the pallet frame (11). A corresponding support plate (13) for each tray cavity (11.1), each support plate (13) including a support base (13.2) configured to support the tray (300) and a support rod (13.1) attached to the support base (13.2); and A plate positioner (15) is disposed below the pallet frame (11) and configured to cooperate with the support rod (13.1) to position all pallets (300) supported on the corresponding support bases (13.2) of the support plate (13) above the pallet frame (11) when the lower sealing assembly (10) is in the rest position (Pr). Its features are, The support rod (13.1) extends from the support base (13.2), through the pallet frame (11), toward the pallet locator (15). The tray frame (11) is configured such that the vacuum chamber (1020) is defined between the tray frame (11) and the upper sealing assembly (20). The support base (13.2) is associated with the tray frame (11) such that, with the lower sealing assembly (10) in the mating position (Pc), the support base (13.2) rests on the tray frame (11), and the support base (13.2) is accommodated in a corresponding tray cavity (11.1) within the vacuum chamber (1020). The lower base (10.1) is configured to be connected to the gas extraction source, and The extraction circuit (14) includes at least one connecting conduit (14.0) disposed between the tray frame (11) and the lower base (10.1) for fluid communication between the vacuum chamber (1020) and the gas extraction source.

2. The heat sealing machine according to claim 1, wherein, The extraction circuit (14) includes, at the lower base (10.1) of the lower sealing assembly (10): A first base port (14.1) is provided for connection to the gas extraction source; The second base opening (14.2) is located on the surface facing the tray frame (11); and A base channel (14.3) fluidly connects the first base port (14.1) and the second base port (14.2). The extraction circuit (14) further includes the following in the tray frame (11): A frame port (14.4) is in fluid communication with the second base port (14.2) via the connecting conduit (14.0); and A frame channel (14.5) fluidly connects the frame port (14.4) to the vacuum chamber (1020).

3. The heat sealing machine according to claim 2, wherein, The extraction circuit (14) includes: Multiple connecting catheters (14.0); and Second base port (14.2) and frame port (14.4) for each connecting catheter (14.0). Each connecting conduit (14.0) is connected between a corresponding second base port (14.2) and a corresponding frame port (14.4), the base channel (14.3) being configured to allow the first base port (14.1) to fluidly communicate with all the second base ports (14.2), and The extraction circuit (14) includes a corresponding frame channel (14.5) associated with each connecting conduit (14.0), or The extraction circuit (14) includes a frame channel (14.5) associated with a connection group formed by a plurality of connecting conduits (14.0), the extraction circuit (14) including the plurality of connection groups, or The extraction circuit (14) includes a frame channel (14.5) associated with all connecting conduits (14.0).

4. The heat sealing machine according to claim 2 or 3, wherein, The lower base (10.1) includes: An upper block (10.11) is attached to the pallet frame (11) and includes an upper surface (10.112) facing the pallet frame (11) and a lower surface (10.111) opposite the pallet frame (11); and The lower block (10.12) is attached to the lifting mechanism (1000) and includes an upper surface (10.121) that contacts the lower surface (10.111) of the upper block (10.11). The upper block (10.11) and the lower block (10.12) are joined to each other in a separable manner. The upper surface (10.112) of the upper block (10.11) includes the second base opening (14.2).

5. The heat sealing machine according to claim 4, wherein, At least one of the upper block (10.11) and lower block (10.12) of the lower base (10.1) includes a block groove (10.81) in a surface (10.111, 10.121) facing the other block (10.11, 10.12), and the base channel (14.3) is formed between the block groove (10.81) and the other block (10.11, 10.12).

6. The heat sealing machine according to any one of claims 2 to 5, wherein, The frame opening (14.4) is located on the lower surface (11.9) of the lower base (10.1) of the tray frame (11) facing the lower sealing assembly (10).

7. The heat sealing machine according to any one of claims 2 to 6, wherein, The frame channel (14.5) is formed by at least one internal notch of the tray frame (11).

8. The heat sealing machine according to any one of claims 2 to 7, wherein, The tray frame (11) includes a fixed frame (11.6) and a floating frame (11.5), the floating frame (11.5) facing the upper sealing assembly (20) and connected to the fixed frame (11.6) to have the possibility of vertical displacement, the floating frame (11.5) being configured to be spaced apart from the fixed frame (11.6) when the lower sealing assembly (10) is in the rest position (Pr), and to contact the fixed frame (11.6) when the lower sealing assembly (10) is in the mating position (Pc) and to create a frame channel (14.5) of the tray frame (11) through the mating.

9. The heat sealing machine according to claim 8, wherein, The floating frame (11.5) includes a recess (11.50) on its surface facing the fixed frame (11.6), and the fixed frame (11.6) includes a recess (11.60) on its surface facing the floating frame (11.5), the recess (11.60) of the fixed frame (11.6) being at least partially facing the recess (11.50) of the floating frame (11.5), and when the lower sealing assembly (10) is in the mating position (Pc), the frame channel (14.5) is created between the recess (11.50) of the floating frame and the recess (11.60) of the fixed frame.

10. The heat sealing machine according to claim 9, wherein, The recess (11.50) of the floating frame (11.5) communicates with the tray cavity (11.1) below the support base (13.2) of the support plate (13).

11. The heat sealing machine according to any one of claims 1 to 10, wherein, The plate positioner (15) includes: Platform (15.0), which faces the support rod (13.1) of the support plate (13) and is arranged between the pallet frame (11) and the lower base (10.1) of the lower sealing assembly (10); and At least one locator rod (15.1) is attached to the platform (15.0), the at least one locator rod (15.1) extending from the platform (15.0) and passing through the lower base (10.1), the tray cavity (11.1) including a cavity base (11.11) configured to support the tray (13.2), and When the lower sealing assembly (10) is in the stationary position (Pr), the platform (15.0) is spaced apart from the lower base (10.1) of the lower sealing assembly (10) by a platform distance (A), and the support base (13.2) of the support plate (13) is spaced apart from the cavity base (11.11) by a plate distance (D). When the lower sealing assembly (10) is in the mating position (Pc), the platform (15.0) is in contact with the lower base (10.1) of the lower sealing assembly (10), and the support base (13.2) of the support plate (13) is supported on the cavity base (11.11). The platform distance (A) is greater than the plate distance (D).

12. The heat sealing machine according to claim 11, wherein, The lower sealing assembly (10) is configured to move a distance greater than the platform distance (A) from the rest position (Pr) to the mating position (Pc).

13. The heat sealing machine according to claim 12, wherein, With the lower sealing assembly (10) in the rest position (Pr), the locator rod (15.1) is supported on the static structure (100.1) of the heat sealer (100), which is arranged below the lower base (10.1) and forms part of the frame (101) of the heat sealer (100). The support rod (13.1) has a length such that with the lower sealing assembly (10) in the rest position (Pr), the support rod (13.1) is supported on the platform (15.0) of the tray locator (15), so that the tray (300) supported by the support plate (13) is located above the tray frame (11), and with the lower sealing assembly (10) in the mating position (Pc), the support rod (13.1) is vertically spaced from the platform (15.0).

14. The heat sealing machine according to claim 13, wherein, The locator rod (15.1) has such a length that when the lower sealing assembly (10) is in the rest position (Pr), the locator rod (15.1) is supported on the static structure (100.1), and when the lower sealing assembly (10) is in the mating position (Pc), the platform (15.0) is supported on the lower base (10.1) of the lower sealing assembly (10), and the locator rod (15.1) is spaced apart from the static structure (100.1) in the vertical direction.

15. The heat sealing machine according to any one of claims 11 to 14, wherein, The plate positioner (15) includes a plurality of positioner rods (15.1) of the same length.

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