|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||B65D-006/28 B65D-008/04 A47J-036/02 A47J-027/00|
|미국특허분류(USC)||219/439 ; 219/436 ; 220/619|
|발명자 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 18 인용 특허 : 17|
The present invention relates to a cooking utensil having a double-layered structure which preserves heat efficiently as well as provides even heat distribution and to a method of fabricating such cooking utensil. The cooking utensil has a heat conduction medium charged between outer and inner shells forming a double-layered structure which is sealed by a curling machine without the use of a built-in safety valve in the wall of the cooking utensil. The method comprises the steps of placing upright the outer shell on a concaved mold, the outer shell havin...
[ What is claimed is:] [1.] A method of manufacturing a cooking utensil having outer and inner shells forming wall and bottom spaces between the outer and inner shells, the wall space being formed substantially along the height of the inner shell, wherein the wall and bottom spaces contain at least partially a heat conductive medium; and a heating coil arranged on the bottom of the outer shell for heating the outer shell of the cooking utensil, the method comprising the steps of:placing upright the outer shell on a concaved mold, the outer shell having a...