Patent Application
20140260122
1. Fields of the Invention
The present invention relates to a thermal shrink packaging machine, especially to a tear part cutter of a thermal shrink packaging machine that cuts correspondingly to a tear line of thermal shrink film to form a tear part while cutting the thermal shrink film. Thus users can hold the tear part to tear apart the thermal shrink film along the tear line conveniently so as to increase practical value of the device.
2. Descriptions of Related Art
Generally, thermal shrink film is used in packaging of drinking bottles or food cans and is printed with product name, trademark, place of production, product manual, advertising slogan, etc. for product identification, increasing product purchase and improving sales rate of product. When the thermal shrink film is covered over bottle caps, it's an anti-theft design. Consumers can learn whether the drinking bottle or food can has been opened by checking the thermal shrink film. Thus the product safety is ensured.
A tearing device of a shrinkable label inserting machine has been developed. The machine includes a right/left (R/L) and lifting controller and a base. The R/L and lifting controller is fixed on and connected to the base. One side of the base is disposed with a drive motor for driving a first gear. There is an inner space inside the base for receiving a tear wheel pivoted horizontally. A first adjustment set is inserted through and arranged at one side of the base and the first adjustment set is also connected to a roller seat pivoted with a roller. Thus the roller seat is moved forward/backward under the control of the first adjustment set. A second gear is set at one side of the tear wheel and is engaged with the first gear. The vertical and horizontal movement of the base is adjusted by the R/L and lifting controller while the first adjustment set is for adjusting the distance between the roller and the tear wheel. Thus a thermal shrink film of the shrinkable label inserting machine is passing between the roller and the tear wheel to be cut by the tear wheel and having a tear line. The tear line is tiny and beautiful.
However, although the above tearing device of the shrinkable label inserting machine can cut the thermal shrink film to form the tear line on the thermal shrink film. While in use, only the tear line is formed on the thermal shrink film and there is no projecting piece for tearing formed on the thermal shrink film. While in use, it's difficult for users to apply force to the thermal shrink film for tearing apart the thermal shrink film.
Thus there is room for improvement and a need to provide a tear part cutter of a thermal shrink packaging machine with higher practical value.
Therefore it is a primary object of the present invention to provide a thermal shrink packaging machine having a cutter and a tear part cutter arranged over the cutter. While the cutter is cutting a thermal shrink film, the tear part cutter cuts correspondingly to a tear line of the thermal shrink film to form a tear part. Thus users can tear apart the thermal shrink film conveniently along the tear line and the device is of higher practical value.
In order to achieve the above object, a thermal shrink packaging machine according to the present invention includes a machine body with a machine plate. The machine plate is arranged with a receiving base of a film extending and cutting unit. Two corresponding slide rails are respectively disposed on two sides of the receiving base while a slide unit is set between the two slide rails. A power source is arranged at the receiving base and an output shaft of the power source is connected to the slide unit. The slide unit is disposed with a cutter while a vacuum nozzle is arranged at the bottom of the slide unit, at the position corresponding to the cutter. Corresponding to the vacuum nozzle, the machine plate is disposed with a curved guiding piece. In the film extending and cutting unit, a tear part cutter is projectingly arranged over the cutter. While the cutter is driven by the power source to cut the thermal shrink film, the tear part cutter cuts correspondingly to a tear line of the thermal shrink film to form the tear part.
The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein
Referring from
The machine body 1 is disposed with an inclined machine plate 11 so as to arrange the film feeding unit 2 at the machine body 1. The film feeding unit 2 is set with a guiding part 21 and a plurality of guide wheels 22. A roll of thermal shrink film 6 is arranged around the guiding part 21 and is driven to move by the guide wheels 22. A receiving base 31 of the film extending and cutting unit 3 is disposed on the machine plate 11 of the machine body 1. Each of two corresponding slide rails 32 is arranged at each of two sides of the receiving base 31 while a slide unit 33 is set between the two slide rails 32 on the receiving base 31. A power source 34 is installed on the receiving base 31 and an output shaft 341 of the power source 34 is connected to the slide unit 33. The slide unit 33 is arranged with a cutter 35. A vacuum nozzle 36 is disposed on the bottom of the slide unit 33, at the position corresponding to the cutter 35 and is connected to a vacuum machine. A curved guiding piece 37 corresponding to the vacuum nozzle 36 is arranged at the machine plate 11. Two guide plates 41 of the film guiding unit 4 are respectively set under two sides of the machine plate 11 of the machine body 1 and corresponding to the guiding part 21 of the film feeding unit 2. A film funnel 42 is arranged outside the bottom end of the two guide plates 41 and is above the cutter 35 of the film extending and cutting unit 3. The film conveying unit 5 is disposed on the machine plate 11 of the machine body 1, above the film extending and cutting unit 3. The film conveying unit 5 having a power source 51 and an output shaft 511 of the power source 51 is assembled with and connected to an ejector plate 52. The ejector plate 52 is positioned between the vacuum nozzle 36 and the curved guiding piece 37 of the film extending and cutting unit 3. In the film extending and cutting unit 3, a tearing cutter 38 is formed above the cutter 35 projectingly.
While in use, referring to
In summary, compared with the structure available now, the present invention further includes a tear part cutter disposed over the cutter. Thus the tear part cutter cuts the thermal shrink film correspondingly to the tear line to form the tear part when the cutter is cutting the thermal shrink film. Therefore users can hold the tear part to tear apart the thermal shrink film along the tear line easily.
Additional advantages and modifications will readily occur to those skilled in the art. Therefore, the invention in its broader aspects is not limited to the specific details, and representative devices shown and described herein. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.
