Patent ID: 7268325

Claim:
A method of making a flexible sheet heater comprising the steps of: a) preparing an electrically conductive fabric; b) preparing a support member having a PET film and a layer of acrylic glue covered on one side of said PET film; c) joining said electrically conductive fabric and said support member together by adhering said layer of acrylic glue to one side of said electrically conductive fabric by pressure; d) cutting said electrically conductive fabric to form a heating element having a predetermined loop pattern by a stamping process; e) applying a conducting glue to each of two distal ends of said heating element and fixedly bonding a respective electrical terminal to the conducting glue at each of the two distal ends of said heating element; f) bonding a first flexible protective sheet member to one side of said heating element opposite to said PET film through a hot press; g) removing said PET film from said heating element; and h) bonding a second flexible protective sheet member to one side of said heating element opposite to said first flexible protective sheet member.