PURPOSE: To secure flexibility, uniformity of heating and a set watt density for a cylindrical heating element by using flexible heating thread which contains discontinuous fiber of stainless steel at one portion of thread to be supplied to a bobbin and making adjustment of the watt density within the range of 0.01-2.0w/cm2.
CONSTITUTION: A cylindrical heating element is braided by use of a flexible heating thread 23 in a part of a thread 21 supplied to a right-turning bobbin and in a part of a thread 22 supplied to a left turning bobbin. Moreover, the cylindrical heating element is provided as one whose watt density is 0.01-2.0w/cm2. It is therefore unnecessary to wind a resistance wire around a pipe when it is heated and kept warm, and the cylindrical heating element is operative when a watt density is within the range of 0.01-2.0w/cm2, so that it is possible to generate heat within the range from 25 to 300°C under the atmosphere of ordinary temperature. It is thereby possible to secure flexibility and keep heating and warmness at a fixed watt density and at such a temperature as desired.
KITAKATA KATSUISA
TAKASHIMA KOZO
KAISEI TSUUSHIYOU KK
FUJI CHEMICAL KK
| JP31008490A | ||||
| JP1172296B |