Insulator sleeve for a thermos bottle
An insulator sleeve includes: a seamed cylindrical body having top and bottom open ends, the seamed cylindrical body including an annular folded insulator wall of an insulator material, and an annular folded surface layer attached to the folded insulator wall, the folded insulator wall extending from the top open end to the bottom open end of the seamed cylindrical body, and having an outer surface, a folded end, and two free ends that are substantially flush with each other, the folded surface layer covering the outer surface of the folded insulator wall, and having a folded end that cooperates with the folded end of the folded insulator wall to define the top open end of the seamed cylindrical body; and a base secured to the bottom open end of the seamed cylindrical body.
1. Field of the Invention
This invention relates to an insulator sleeve for a thermos bottle, more particularly to an insulator sleeve having a folded insulator wall covered by a surface layer.
2. Description of the Related Art
The object of the present invention is to provide an insulator sleeve that can overcome the aforesaid drawback of the prior art.
According to one aspect of this invention, there is provided an insulator sleeve that comprises: a seamed cylindrical body having top and bottom open ends respectively defining top and bottom openings, the seamed cylindrical body including an annular folded insulator wall of an insulator material, and an annular folded surface layer attached to the folded insulator wall, the folded insulator wall extending from the top open end to the bottom open end of the seamed cylindrical body, and having an outer surface, a folded end, and two free ends that are substantially flush with each other, the folded surface layer covering the outer surface of the folded insulator wall, and having a folded end that cooperates with the folded end of the folded insulator wall to define the top open end of the seamed cylindrical body; and a base secured to the bottom open end of the seamed cylindrical body for covering the bottom opening of the seamed cylindrical body.
According to another aspect of this invention, there is provided a method for making an insulator sleeve. The method comprises: attaching a surface layer to an insulator sheet of an insulator material; folding the assembly of the surface layer and the insulator sheet into symmetrical halves such that the folded halves of the insulator sheet are sandwiched between the folded halves of the surface layer; scrolling and stitching the folded symmetrical halves of the assembly of the surface layer and the insulator sheet into a cylindrical body; and securing a base to a bottom open end of the cylindrical body.
Other features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiment of this invention, with reference to the accompanying drawings, in which:
In this embodiment, the folded insulator wall 4 includes annular inner and outer wall portions 43, 44 that respectively define the free ends 42 of the folded insulator wall 4 and that are stacked and are adhesively bonded together.
The base 6 and the seamed cylindrical body 5 are stitched together. The base 6 includes a circular two-layered insulator wall 61 of the insulator material, and inner and outer surface layers 62, 63. The two-layered insulator wall 61 of the base 6 has inner and outer wall surfaces 611, 612. The inner and outer surface layers 62, 63 are respectively attached to the inner and outer wall surfaces 611, 612 of the two-layered insulator wall 61 of the base 6. A vent hole 65 is formed in the base 6 for facilitating insertion of the thermos bottle into the insulator sleeve.
In this embodiment, the folded halves of the insulator sheet 4′ are adhesively bonded together prior to the scrolling operation.
Since the top end, i.e., the folded end 41, of the folded insulator wall 4 is covered by the folded surface layer 3 in the insulator sleeve of this invention, the aforesaid drawback associated with the prior art can be eliminated.
While the present invention has been described in connection with what is considered the most practical and preferred embodiment, it is understood that this invention is not limited to the disclosed embodiment but is intended to cover various arrangements included within the spirit and scope of the broadest interpretation and equivalent arrangements.
Claims
1. An insulator sleeve for a thermos bottle, comprising:
- a seamed cylindrical body having top and bottom open ends respectively defining top and bottom openings, said seamed cylindrical body including an annular folded insulator wall of an insulator material and an annular folded surface layer attached to said folded insulator wall, said folded insulator wall extending from said top open end to said bottom open end of said seamed cylindrical body, and having an outer surface, a folded end, and two free ends that are substantially flush with each other, said folded surface layer covering said outer surface of said folded insulator wall, and having a folded end that cooperates with said folded end of said folded insulator wall to define said top open end of said seamed cylindrical body; and
- a base secured to said bottom open end of said seamed cylindrical body for covering said bottom opening of said seamed cylindrical body.
2. The insulator sleeve of claim 1, wherein said folded insulator wall includes annular inner and outer wall portions that respectively define said free ends of said folded insulator wall and that are stacked and are adhesively bonded together.
3. The insulator sleeve of claim 2, wherein said base and said seamed cylindrical body are stitched together.
4. The insulator sleeve of claim 2, wherein said base includes a circular two-layered insulator wall of said insulator material, and inner and outer surface layers, said two-layered insulator wall of said base having inner and outer wall surfaces, said inner and outer surface layers being respectively attached to said inner and outer wall surfaces of said two-layered insulator wall of said base.
5. The insulator sleeve of claim 2, wherein said base is formed with a vent hole.
6. A method for making an insulator sleeve, comprising:
- attaching a surface layer to an insulator sheet of an insulator material;
- folding the assembly of the surface layer and the insulator sheet into symmetrical halves such that the folded halves of the insulator sheet are sandwiched between the folded halves of the surface layer;
- scrolling and stitching the folded symmetrical halves of the assembly of the surface layer and the insulator sheet into a cylindrical body; and
- securing a base to a bottom open end of the cylindrical body.
7. The method of claim 6, further comprising bonding adhesively the folded halves of the insulator sheet together prior to the scrolling operation.
8. The method of claim 6, wherein the base is secured to the bottom open end of the cylindrical body by stitching.
9. The method of claim 6, wherein the base includes inner and outer surface layers, and a circular two-layered insulator wall of said insulator material sandwiched between the inner and outer surface layers.
Type: Application
Filed: Jul 18, 2006
Publication Date: Jan 24, 2008
Inventor: Yeh-Fei Chu (Taichung Hsien)
Application Number: 11/489,302