Patent ID: 8941034
Filing Date: 2015-01-27
Classification: B29C,F16L,H05B,Y10T

Abstract:
1. An electric heater for heating surfaces of components, onto which the electric heater is pushed or placed, the electric heater comprising: at least one tubular heating element having an outer tubular metal jacket and one or more heat emitting parts embedded in an electrically insulating core and enclosed by the outer tubular metal jacket; an outer metal tube; an inner metal tube arranged in the outer metal tube, a wall of the outer tube forming at least one first contact area made of metal, a wall of the inner tube forming at least one second contact area made of metal and at least one other contact area milled from a part or drawn from a sheet metal, the other contact area connecting the first contact area firmly to the second contact area, the outer metal tube and the inner metal tube having a recess extending in an axial direction, the tubular heating element being arranged between the first contact area made of metal and the second contact area made of metal; and at least one powder or granular material, the tubular heating element being at least partly embedded in the at least one powder or granular material, wherein: a space between the first contact area made of metal and the second contact area made of metal, in which the tubular heating element is arranged, wherein the space is filled with the powder or granular material, the powder or granular material abutting against at least parts of the first contact area made of metal and the second contact area made of metal and the at least one tubular heating element is in direct mechanical contact and is in direct electrical contact with at least one of the first contact area made of metal and the second contact area made of metal.