PROBLEM TO BE SOLVED: To resolve problems that a fixed heater wire is likely to be damaged from a load of external stress by contraction of the heater wire caused by variation in a temperature and may cause deterioration of an outer coat of the heater wire when contacted with an adhesive agent or a gluing agent, and that the adhesive agent and the gluing agent are susceptible to heat and water and thus likely to be peeled, and that a large-sized device such as a large-sized drier and a thermal press device and the like is required.SOLUTION: A planar electrothermal heating instrument has an upper fabric 1A and a lower fabric 1B that can be deposited by an ultrasonic wave or a high-frequency wave, a connector C or a power supply code, and a heater wire 2. A method of manufacturing the planar electrothermal heating instrument includes: a step of providing and arranging the heater wire 2 so as to have a plurality of folded portions 2a and a plurality of substantially-straight line portions 2b a step of overlapping the upper fabric 1A with the lower fabric 1B and performing ultrasonic wave point deposition 3 by an ultrasonic wave or high-frequency point deposition 3 by high-frequency wave at an arbitrarily interval with a play interval around the heater wire 2 and a step of darning 4 peripheral parts of the upper fabric 1A and the lower fabric 1B.COPYRIGHT: (C)2012,JPO&INPIT【課題】ヒーター線が固定されると温度変化によるヒーター線の伸縮により外部応力の負荷に対してダメージを受け易く、また、接着剤や粘着剤と接触するとヒーター線の外皮が劣化する要因とも成ると共に、接着剤や粘着剤は熱や水に弱いもので剥離し易く、また、大型の乾燥機や熱プレス装置等の大型装置を必要としており課題を有している。【解決手段】超音波溶着又は高周波溶着可能な上生地1Aと下生地1Bと、コネクターC又は電源コードと、ヒーター線2とを備え、ヒーター線2を複数の折り返し部位2aと複数の略直線部位2bとを備えて配設する工程と、下生地1Bに上生地1Aを重ね合わせてヒーター線2の周りに遊び間隔を有した適宜間隔の超音波による超音波点溶着3又は高周波による高周波点溶着3する工程と、上生地1Aと下生地1Bとの周縁部を縢り縫着4する工程と、を含む。【選択図】図1
