Sealing Structure of Air-Pocket Film Machine

Abstract

A sealing structure of an air-pocket bag machine includes at least one heating plate, a sealing roller that is rotatably mounted to and positioned against the heating plate for conducting a heating and pressing operation on and thus sealing at least one air-pocket bag through a heating operation of the heating plate, and at least one driving roller that is coaxially and rotatably coupled to the sealing roller for driving and advancing the air-pocket bag. With such an arrangement, when the air-pocket bag machine is activated, the air-pocket bag is driven by being in contact engagement with the driving roller and thus is moved to fast, stably, and continuously pass under the sealing roller. Due to the sealing roller and the driving roller being rotatably coupled in a coaxial manner, the advancing speed of the air-pocket bag is consistent with the rotational speed of the sealing roller.

Claims

1. A sealing structure of an air-pocket bag machine, comprising: at least one heating plate; a sealing roller that is rotatably mounted to and positioned against the heating plate for conducting a heating and pressing operation on and thus sealing at least one air-pocket bag through a heating operation of the heating plate; and at least one driving roller that is coaxially and rotatably coupled to the sealing roller for driving and advancing the air-pocket bag.

2. The sealing structure of the air-pocket bag machine according to claim 1, wherein the sealing roller comprises a heat conduction board in contact engagement with the heating plate.

3. The sealing structure of the air-pocket bag machine according to claim 2 further comprising a base that houses the heating plate and the heat conduction board therein.

4. The sealing structure of the air-pocket bag machine according to claim 3, wherein the base comprises, formed therein, a receiving space for receiving the heating plate and the heat conduction board and at least one isolation space at one side of the receiving space.

5. The sealing structure of the air-pocket bag machine according to claim 3, wherein the heating plate, the heat conduction board, and the base each comprise at least one positioning hole formed therein.

6. The sealing structure of the air-pocket bag machine according to claim 5, wherein the positioning hole receives a fastener to extend therethrough.

7. The sealing structure of the air-pocket bag machine according to claim 1, wherein the sealing roller has an outer circumference forming a contact surface.

8. The sealing structure of the air-pocket bag machine according to claim 1, wherein the driving roller is made of a rubber material.

9. The sealing structure of the air-pocket bag machine according to claim 1, wherein the heating plate and the sealing roller are made of metallic materials.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG. 1 is a perspective view showing a preferred embodiment of the present invention.

[0015] FIG. 2 is an exploded view showing the preferred embodiment of the present invention.

[0016] FIG. 3 is a cross-sectional view of the preferred embodiment of the present invention taken along line A-A of FIG. 1.

[0017] FIG. 4 is a schematic view illustrating an operation of the preferred embodiment of the present invention.

[0018] FIG. 4A is an enlarged view of a circled portion of FIG. 4.

[0019] FIG. 5 is another schematic view illustrating an operation of the preferred embodiment of the present invention.

[0020] FIG. 6 is a schematic view showing a use condition of the preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] The following descriptions are exemplary embodiments only, and are not intended to limit the scope, applicability or configuration of the invention in any way. Rather, the following description provides a convenient illustration for implementing exemplary embodiments of the invention. Various changes to the described embodiments may be made in the function and arrangement of the elements described without departing from the scope of the invention as set forth in the appended claims.

[0022] Referring to FIGS. 1, 2, and 3, which are respectively a perspective view and an exploded view of a preferred embodiment of the present invention and a cross-sectional view taken along line A-A of FIG. 1, these drawings clearly show that the present invention comprises:

[0023] at least one heating plate 1;

[0024] a sealing roller 2 that is rotatably mounted to and positioned against the heating plate 1 to apply heating and pressing to and thus sealing at least one air-pocket bag through a heating operation conducted by the heating plate 1, the sealing roller 2 having an outer circumference that defines a contact surface 22, the sealing roller 2 comprising a heat conduction board 21 in contact engagement with the heating plate 1;

[0025] a base 4 that houses the heating plate 1 and the heat conduction board 21 therein, the base 4 comprising a receiving space 41 for receiving the heating plate 1 and the heat conduction board 21 and at least one isolation space 42 at one side of the receiving space 41;

[0026] at least one driving roller 3 that is coaxially and rotatably mounted with the sealing roller 2 for driving the air-pocket bag, the driving roller 3 being made of a rubber material; and

[0027] the heating plate 1, the heat conduction board 21, and the base 4 being each provided with at least one positioning hole 6, so as to have a fastener 61 received in and extending through the positioning hole 6.

[0028] The structure of the present invention has been illustrated with the above description. Such a structure provides advantages of allowing for a sealing operation to be performed at an increased speed, achieving uniform heating result, and stable sealing effect. Details will be further provided in the following.

[0029] Referring to FIGS. 1-6, which are respectively a perspective view and an exploded view of a preferred embodiment of the present invention, a cross-sectional view taken along line A-A of FIG. 1, a schematic view illustrating an operation of the preferred embodiment of the present invention, an enlarged view of a circled portion of FIG. 4, another schematic view illustrating an operation of the preferred embodiment of the present invention, and a schematic view showing a use condition of the preferred embodiment of the present invention, these drawings clearly show that the sealing structure provided in the present invention is of a thinned configuration, wherein the heating plate 1 and the heat conduction board 21 are received and housed, in a compact arrangement, in the receiving space 41 of the base 4 with the fastener 61 extending through the positioning holes 6 to maintain a stable overall structural relationship in a condition of a high speed rotation of the sealing roller 2. Further, the heating plate 1 is completely housed in and concealed inside a housing 5 with only the driving roller 3 and the sealing roller 2 partly exposed. Taking the instant embodiment as an example, opposite sides of the sealing roller 2 are respectively provided with a heating plate 1 and a driving roller 3, of which details of operation will be illustrated in the following:

[0030] After activation of the air-pocket bag machine, the heating plate 1 immediately emits heat. The heat conduction board 21 of the sealing roller 2 is set in direct contact engagement, at a large area, with the heating plate 1 and an isolation space 42 is formed at the side of the heating plate 1 that is distant from the heat conduction board 21, so that the heat emitting from the heating plate 1 is fast and directly conducted to the heat conduction board 21 to be further transmitted through the heat conduction board 21 to the sealing roller 2. An air-pocket bag 7 that has been filled with air by the air-pocket bag machine is conveyed through the present invention by frictional engagement thereof with the driving roller 3 so as to have the air-pocket bag 7 advanced forward in such a way that the advancing or conveyance speed of the air-pocket bag 7 is consistent with a tangential speed of the driving roller 3. Further, since the driving roller 3 and the sealing roller 2 are coaxially and rotatably coupled, when the sealing roller 2 is put into rotation, the contact surface 22 of the outer circumference of the sealing roller 2 applies pressing and heating to the air-pocket bag 7 in a uniform manner, wherein the heating and pressing operation of different sections is performed with different sections of the contact surface 22. When the contact surface 22 of one portion of the sealing roller 2 is in contact engagement with the air-pocket bag 7 and thus loses heat, the contact surface 22 of an opposite portion is restored back to a preset temperature by contacting the heat conduction board 21. As such, the sealing effect of the sealing roller 2 can be maintained uniform and thus, the quality of the air-pocket bag 7 can be maintained even through the sealing operation is performed at an increased speed in the air-pocket bag machine.

[0031] It will be understood that each of the elements described above, or two or more together may also find a useful application in other types of methods differing from the type described above.

[0032] While certain novel features of this invention have been shown and described and are pointed out in the annexed claim, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the claims of the present invention.