|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||428/69 ; 181/288 ; 181/294 ; 428/76|
|발명자 / 주소|
|인용정보||피인용 횟수 : 18 인용 특허 : 2|
This invention relates to vacuum-tight tubular enclosures, made of plastic material and designed for making up insulating panels. Each vacuum cell is composed of a rigid plastic tube (1), both ends of which are closed by perforated plugs (3). This tube is placed in a thin flexible sheath (6) of highly impervious plastic material, preferably polyvinylidene or a derivative of polyvinylidic alcohol. This sheath extends beyond both ends of the rigid tube and is sealed by welding after the rigid tube has been evacuated to a high vacuum, namely less than 10-3 ...
A cell for insulating panels comprising: plastic gas impervious flexible sheath, having first and second sealed ends; and at least one rigid hollow, plastic tubular element having first and second ends, said tubular element being disposed within said sheath; wherein said sealed sheath and tubular element have been substantially evacuated.