The present invention relates to heating trowel which processes by heat while observing the status of the working material, such as soldering iron, plastic welder, iron, hair iron and the like, and specifically it relates to heating trowel that could be used within few seconds from providing power. A heating trowel comprises a heating wire made of metal plate such as iron chrome alloy and which is thinned to the limit that it could maintain shape, an electrical insulator which is a thin plate of aluminum nitride and the like having more than 10 times the heat conductivity of said heating wire, and a trowel tip/heat storage made from copper and the like having more than twice the heat conductivity of the aluminum nitride and the like and also having high heat capacity, and formed by sufficiently adhering these components closely by pressing and the like using a heat insulating supporter. Also, it is divided into two to a bare heating trowel and a receiving heating device. The control method comprises providing a fixed large amount of electricity for a fixed short period of time to a heating wire by operating a power switch once and rising the temperature of a trowel tip/heat storage rapidly and obtaining a desired temperature by pressing the switch for a simple countable number of times. The heating trowel mentioned above could have 10 times larger heat value than the conventional one so that it could heat the trowel tip/heat storage having large heat capacity rapidly. Also, by rising the temperature of the trowel tip stepwise by switch operation, it could be controlled without a measurement device or a control mechanism. Also, when it reaches desired temperature, the stored heat is large so that it could be used without heating. Therefore, a bare heating trowel free of cords could be used.
This application is a continuation of U.S. Ser. No. 09/720,107 filed Dec. 2, 2000 now U.S. Pat. No. 6,455,813. The parent application was filed with the United States Designed/Elected Office under 35 U.S.C. 371 claiming priority to Japanese Patent Application No. JP1999-150410 filed on Apr. 20, 1999. These applications are incorporated herein by reference.
Priority Data
Apr 20, 1999 [JP] 11-150410 Jan 07, 2000 [JP] PCT/JP00/00036
