Electrically heat tool

Claim 1

A heating tool comprising: (a) a handle having a bore in one end thereof and an intermediate recess adjacent said bore, said bore opening into said recess; (b) a heating shoe having a first internal bore of a first diameter and a second bore of a greater diameter extending outwardly therefrom; (c) a cylindrical heating cartridge of an outer diameter matched to said first internal bore in said heating shoe inserted into said first internal bore; (d) a sleeve comprising a unitary cylindrical member with a central bore therethrough, said sleeve having a first end section of an outer diameter matched to the inner diameter of said second bore of said shoe, an enlarged collar portion inwardly of said first end section and a second end section extending from the other side of said collar portion, the central bore of said first end section being enlarged, said heating cartridge having an end disposed in said enlarged central bore, said first end section of said sleeve being inserted into said second bore with said collar portion abutting against the end of said shoe, said second end section extending into the bore of said handle; (e) an insulating collar having a bore of a diameter matched to the outer diameter of said second end section and having a first end of outer diameter substantially equal to the diameter of said collar portion and a second end of diameter matched to said bore in said handle, said collar having a length substantially equal to the length of said second end section, surrounding said second end section with said first end abutting against said collar and said second end inserted in the bore in said handle, said insulating collar thereby extending between said handle and said heating shoe and sleeve and minimizing heat transfer between said heating shoe and sleeve and said handle; (f) means for detachably connecting the first end section of said said sleeve to said shoe; (g) means for detachably connecting the second end of said collar and second end section of said sleeve to said handle; (h) a heat control capable of varying the amount of power supplied to the electric heating cartridge, to thereby control the heat generated by it, disposed it said recess of said handle; and (i) wiring means extending through the central bore in said sleeve interconnecting said cartridge and heat control; and (j) wiring interconnected with said heat control, extending from said handle to a plug, for supplying power to said heat sealing tool.