This non-provisional application claims priority under 35 U.S.C. ยง119(a) on Patent Application No. 100142941 filed in Taiwan, R.O.C. on 2011 Nov. 23, the entire contents of which are hereby incorporated by reference.
The present invention relates to a cushioning device, and more particularly to an automatically retracting cushioning device.
Currently, bubble paper or PVC is mostly used to cover an article when packing, but the cushioning effect is not good, easily resulting in article damage. To solve the bad cushioning effect in the prior art, an air packing bag made of a resin film is developed, which is hot-sealed to form airtight air cylinders, and configured with air filling entrances allowing air filling; the air packing bag can be used as a cushioning material in interior packaging after air is filled in the air cylinders through the air filling entrances.
In an air packing bag, a plurality of air cylinders are formed of check valves, and bendable nodes are configured on the air cylinders in advance, allowing bendable sides of an air cylinder sheet to be sealed forming a cushioning air bag for accepting an article, thereby providing a better cushioning packing structure for a cushioning material.
However, since an air packing bag available in the market must be tailor-made depending on the size of an article, it is very inconvenient and time-consuming. Certain portions of the air packing bag usually need to be extended or shortened if a common size thereof is adopted, and it is also inconvenient in use.
Furthermore, some air packing bags with a repeatedly liftable upper cover can be used again and again. However, if the packing bag is too large or too small for a packed article, article packing may be inadequate. Further, for example, air bags with a sealable opening must be destroyed if an article packed therein needs to be taken out after the opening is sealed; otherwise, it cannot be taken out. Such kinds of air bags are not only unfit or unsuitable for an improper size of article, but wasteful when used.
To improve an air packing bag structure, allowing different shapes of different sizes of article to share the same air packing bag, and to be stored in different sizes of outer boxes while being packed, and further reducing the production cost thereof and using them repeatedly, the present invention is proposed.
The present invention proposes an automatically retracting cushioning device, including: a first air cylinder sheet, including a plurality of first air cylinders; a second air cylinder sheet, in air communication with the first air cylinder sheet and including a plurality of second air cylinders; a third air cylinder sheet, in air communication with the second air cylinder sheet and including a plurality of third air cylinders; and a plurality of retractable blocks, positioned on one end of the third air cylinder; wherein the third air cylinder sheet and the second air cylinder sheet bent toward the first air cylinder sheet allows the third air cylinder sheet and the first air cylinder sheet to be approximately perpendicular to the second air cylinder sheet, thereby clamping an article.
The retractable blocks may be positioned on one end of the first air cylinders, retracting the first air cylinders. Furthermore, the present invention further includes: a fourth air cylinder sheet, including a plurality of fourth air cylinders, and being in air communication with the third air cylinder sheet; bending the fourth air cylinder sheet allows the fourth air cylinder to be parallel approximately to the second air cylinder sheet. Consequently, the number of the fourth air cylinder sheets is two; bending the fourth air cylinder sheets allows the fourth air cylinder sheet to be moved further away from the third air cylinder sheet to be parallel approximately to the third air cylinder sheet and positioned at the same side as the first air cylinder sheet. In addition, the retractable blocks may further respectively positioned on the two ends of the third air cylinders, retracting the third air cylinders.
The present invention allows the air cylinder sheet to be retracted to a smaller size through the configuration of the retractable blocks so as to be able to match with various different sizes of articles, and be placed in various different sizes of boxes too, solving the problems of inadequate packing when an article is too large or too small in comparison with a conventional air bag, and when a packed article cannot be taken out, or a conventional air bag must be damaged, if the article needs to be taken out after an opening of the air bag is sealed.
The present invention can be more fully understood by reference to the following description and accompanying drawings, in which:
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The first air cylinder sheet includes a plurality of first air cylinders 11 and an air filling passageway 12, where the air filling passageway 12 is positioned side by side with one side of the plurality of first air cylinders 11, and used for filling air into the plurality of first air cylinders 11. In addition, the first air cylinder sheet 10 further includes a continuous check valve 13, allowing the air filling passageway 12 to be in air communication with the plurality of first air cylinders 11; the air in the air filling passageway 12 is filled into the plurality of air cylinders 11 through the continuous check valve 13, and the plurality of air cylinders 11 are then sealed through the continuous check valve 13, preventing the air in the plurality of air cylinders 11 from leaking.
The second air cylinder sheet 20 is connected to the first air cylinder sheet 10 in series at one side thereof and in air communication with the first air cylinder sheet 10. The second air cylinder sheet 20 includes a plurality of second air cylinders 21. Consequently, the second air cylinder 21 is shorter than the first air cylinder 11 with respect to the present embodiment, but the present invention is not limited to this to this.
The third air cylinder sheet 30 is connected in series with the second air cylinder sheet 20 at one side thereof and in air communication with the second air cylinder sheet 20. The third air cylinder sheet 30 includes a plurality of third air cylinders 31. Consequently, the third air cylinder 31 is longer than the second air cylinder 21, and preferably longer than the first air cylinder 11, but the present invention is not limited to this. In addition, the third air cylinder sheet 30 has a plurality of retractable blocks 32, respectively positioned on one side of each third air cylinder 31, where the retractable blocks 32 are formed by sticking two sheets of film 2a, 2b by means of hot sealing. Consequently, it is preferably not to stick a portion of area while hot-sealing the two sheets of film 2a, 2b, allowing each retractable block to be in air communication with others, but, the hot sealing used herein is only an example, the present invention is not limited to this.
Furthermore, the retractable blocks 32 positioned on the third air cylinder 31 preferably are nodes arranged distantly, i.e., a definite distance being kept among the retractable blocks 32 allows every retractable block 32 to be arranged distantly. The retractable blocks 32 on one end of each third air cylinder 31 numbers three, but the present invention is not limited to this; the retractable blocks 32 may further be arrange in vertical accumulation. Consequently, the retractable blocks 32 respectively on each two adjacent third air cylinders 31 are arranged in a corresponding configuration, allowing a definite distance to be kept among the retractable blocks 32 so that the retractable blocks 32 are arranged distantly and form approximately a checker-board-typed body. However, this is only an example; the present invention is not limited to this. Through the configuration of the retractable blocks 32, the adjacent retractable blocks 32 will bend the third air cylinders 31 automatically, causing them to be retracted, and thus reducing the ends thereof when the third air cylinder sheet 30 is pressed.
The first air cylinder sheet 10, second air cylinder sheet 20 and third air cylinder sheet 30 are preferably formed by sticking two sheets of outer film 2a, 2b together by means of hot sealing, and the air filling passageway 12 by sticking the two sheets of outer film 2a, 2b by means of hot sealing. Furthermore, the continuous check valve 13 is formed by sticking the two sheets of inner film 1a, 1b together by means of hot sealing. The two sheets of inner film 1a, 1b are positioned between the two sheets of outer film 2a, 2b, and hot sealing points 2c are yielded by means of hot sealing, thereby sticking the outer film 2a to the inner film 1a and outer film 2b to the inner film 1b. Furthermore, a plurality of air inlets 2e are formed between the two sheets of inner film 1a, 1b by not sticking the two sheets of inner film 1a, 1b together by means of hot sealing after a heat resistant material 1c is spread between the two sheets of inner film 1a, 1b, where each air inlet 2e corresponds to one first air cylinder 11. In addition, each air inlet 2e is connected to an air channel 14 formed between the two sheets of inner film 1a, 1b by sticking the two sheets of inner film 1a, 1b by means of hot sealing after the heat resistant material 1c is spread between the two sheets of inner film 1a, 1b.
Air will pull the two sheets of outer film 2a, 2b and the two sheets of inner film 1a, 1b apart outward after it enters an inflation inlet 12a to expand the air filling passageway 12. Consequently, the air flows into the first air cylinders 11 through the air channels 14 to cause the first air cylinder 11 to be filled with air and expanded. Thereafter, the internal air pressure in the first air cylinders 11 presses the two sheets of inner film 1a, 1b to attach to the outer film 2a or 2b tightly, covering the air channels 14 to seal the first air cylinders 11, thereby preventing the air in the first air cylinders 11 from leaking, and achieving an airtight effect.
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The air cylinder sheet can be retracted to a smaller size through the configuration of the retractable blocks of the present invention, solving the problems that the unfitted or unsuitable package happens when an article is too large or too small in comparison with a conventional air bag, and that a packed article cannot be taken out, or that a conventional air bag must be damaged if the article needs to be taken out after an opening of the air bag is sealed.
While the present invention has been described by the way of example and in terms of the preferred embodiments, it is to be understood that the invention need not be limited to the disclosed embodiments. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims, the scope of which should be accorded the broadest interpretation so as to encompass all such modifications and similar structures.
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