DOUBLE-LAYER CONTAINER
A double-layer container including a main body having a first section and a second section. The first section has an opening and a bottom portion. An upper section of the main body is outward folded back to form the second section, whereby the second section extends from a top end of the first section. The second section has a free end extending to a position outside the first section above the bottom portion thereof. A first space is defined between the first section and second section. The first section is not totally enclosed in the second section so that the double-layer container can be more easily made of less material to lower manufacturing cost. By means of the double-layer design, when containing a cold/hot liquid, a user's hand can hold the double-layer container without touch the first section so that the user's hand is protected from being damped or burnt.
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The present invention relates generally to a double-layer container, and more particularly to a double-layer container with heat/cold insulation effect. The double-layer container can be easily made of less material to lower manufacturing cost.
BACKGROUND OF THE INVENTIONThere are various commercially available double-layer cups and infuser pots made of stainless steel or glass material.
In the case that the material of the conventional double-layer structure is stainless steel material, the conventional double-layer structure is made by means of metal expansion process. The metal expansion process is applicable to hollow seamless tubular material and cup-shaped material to manufacture double-layer cup or infuser.
In the case that the material of the conventional double-layer cup is glass, the conventional double-layer cup is made by means of blowing process. The bottom of the double-layer cup is then sealed. No matter whether the double-layer structure is made of stainless steel or glass material, the space between the inner and outer walls must be vacuumized to ensure that no heat transfer medium exists in the space so as to achieve heat/cold insulation effect. The vacuumization is a complicated process so that the manufacturing cost is greatly increased and the working time is greatly prolonged. In case the vacuumization is not truly completed, the double-layer cup will fail to achieve heat/cold insulation effect.
Besides, the conventional double-layer cup can fully insulate the heat inside the double-layer cup. Therefore, when a liquid is contained in the double-layer cup, a user can hardly visually know whether the liquid is cold or hot. To know the temperature of the liquid contained in the double-layer cup, the user must touch the liquid with his hand. This is quite dangerous and the user may get burnt when touching the liquid. Also, it is not hygienic to touch the liquid with the hand.
Furthermore, for making the double-layer structure, the capacity of the double-layer cup will be inevitably reduced. With the same outer diameter, the capacity of the double-layer cup will be smaller than the capacity of a common single-layer cup. According to the above, the conventional double-layer cup has the following defects:
1. The material cost is higher.
2. The working time is longer.
3. The capacity is smaller.
A primary object of the present invention is to provide a double-layer container with heat insulation effect.
To achieve the above and other objects, the double-layer container of the present invention includes a main body having a first section and a second section. The first section has an opening and a bottom portion. An upper section of the main body is outward folded back to form the second section, whereby the second section extends from a top end of the first section. The second section has a free end extending to a position outside the first section above the bottom portion thereof. A first space is defined between the first section and second section. The first section is not totally enclosed in the second section so that the double-layer container can be more easily made of less material to lower manufacturing cost. By means of the double-layer design, when containing a cold/hot liquid, a user's hand can hold the double-layer container without touch the first section so that the user's hand is protected from being damped or burnt. Moreover, the first space is open to outer side to enhance convection between the first space and outer side and prevent the heat of the first section from being conducted to the second section. The double-layer container can be made of glass material, stainless steel material or ceramic material.
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:
Please refer to
The first section 111 has a bottom portion 114 and an opening 115 in communication with the bottom portion 114 to define a receiving space 116 for containing liquid therein.
An upper section of the main body is outward folded back to form the second section 112, whereby the second section 112 extends from a top end of the first section 111. The second section 112 has a free end 1121 extending to a position outside the first section 111 above the bottom portion 114 thereof. Preferably, the free end 1121 of the second section can selectively extend to a position outside the first section 111 one-half the height of the first section 111 from the top end thereof (as shown in
The first space 113 is defined between the first section 111 and the second section 112. The first section 111 has an outer diameter smaller than an inner diameter of the second section 112.
Please refer to
Please refer to
Alternatively, the wall face 1111 of the first section 111 is concaved (as shown in
Please refer to
According to the above arrangement, the first section 111 is not totally enclosed by the second section 112. Therefore, the first section 111 can have, but not limited to, various configurations (as shown in
By means of varying the configuration of the first section 111, the capacity of the double-layer container can be increased.
In the conventional double-layer container, the inner layer is totally enclosed in the outer layer so that the inner layer must be contracted due to the limitation of the outer layer. In comparison with the conventional double-layer container, the first section 111 of the present invention is free from the limitation of the second section 112 and can be expanded to enlarge the capacity. Accordingly, with the same outer diameter, the present invention has larger capacity than the conventional double-layer container.
The double-layer container 1 of the present invention can be made of glass material, stainless steel material or ceramic material. Since the first section 111 is not totally enclosed in the second section 112, the double-layer container 1 of the present invention can be more easily made of less material. In use of the double-layer container 1 of the present invention, a user's hand is protected from being burnt or damped. Therefore, in comparison with the conventional double-layer container, the double-layer container 1 of the present invention has the following advantages:
1. It is easy to manufacture the double-layer container 1 of the present invention.
2. The manufacturing cost of the double-layer container 1 of the present invention is lowered.
3. The capacity of the double-layer container 1 of the present invention is larger.
The present invention has been described with some preferred embodiments thereof and it is understood that many changes and modifications in the described embodiments can be carried out without departing from the scope and the spirit of the invention. For example, the configuration or pattern of the present invention can be varied to achieve equivalent effect. The scope of the present invention is intended to be limited only by the appended claims.
Claims
1. A double-layer container comprising a main body having a first section and a second section, an upper section of the main body being outward folded back to form the second section, whereby the second section extends from a top end of the first section, the first section having a bottom portion and an opening, the second section having a free end extending to a position outside the first section above the bottom portion thereof, a first space being defined between the first section and the second section.
2. The double-layer container as claimed in claim 1, wherein the opening of the first section communicates with the bottom portion thereof to define a receiving space.
3. The double-layer container as claimed in claim 1, wherein the first section has an outer diameter smaller than an inner diameter of the second section.
4. The double-layer container as claimed in claim 1, wherein the free end of the second section extends to a position outside the first section one-half the height of the first section from the top end thereof.
5. The double-layer container as claimed in claim 1, wherein the free end of the second section extends to a position outside the first section two-third the height of the first section from the top end thereof.
6. The double-layer container as claimed in claim 1, wherein the free end of the second section extends to a position outside the first section three-fourth the height of the first section from the top end thereof.
7. The double-layer container as claimed in claim 1, wherein a handle is disposed on the first section.
8. The double-layer container as claimed in claim 1, wherein a handle is disposed on outer side of the second section.
9. The double-layer container as claimed in claim 1, wherein the first section has a portion corresponding to the second section, a wall face of the portion being waved.
10. The double-layer container as claimed in claim 1, wherein the first section has a portion corresponding to the second section, a wall face of the portion being concaved.
11. The double-layer container as claimed in claim 1, wherein the main body is made of ceramic material.
12. The double-layer container as claimed in claim 1, wherein the main body is made of stainless steel material.
13. The double-layer container as claimed in claim 1, wherein the main body is made of glass material.
14. The double-layer container as claimed in claim 1, wherein the free end of the second section extends to a position outside the first section one-half the height of the first section, two-third the height of the first section or three-fourth the height of the first section from the top end thereof.
Type: Application
Filed: Oct 16, 2009
Publication Date: Apr 21, 2011
Applicant: (Taipei City)
Inventor: Keng-Jen Chen (Taipei City)
Application Number: 12/580,258
International Classification: B65D 3/22 (20060101);