Abstract: An auxiliary capacitor is added to a first capacitor formed from two metallized films wound into a cylindrical roll. Once the two metallized films have been wound a sufficient number of layers to form a capacitor having the desired capacitance, the auxiliary capacitor is added by one of two methods. In the first method, one of the metallized films is cut and a plain film is inserted between the roll and the uncut metallized film. After the plain film has been inserted and wound a portion of a turn, a metal foil is inserted between the plain film and the dielectric side of the uncut metallized film. The two films and foil then are wound together a sufficient number of layers to form the desired capacitance of the auxiliary capacitor.An electrical contact foil may be added between the plain film and the metal foil or the metal foil may be left slightly exposed for electrical contact to be made to it.In the second method both metallized films are first terminated. The core then may be sealed and heat treated.

Abstract: A capacitor winding machine includes a first core loading and winding position for winding a predetermined number of turns of two metallized films onto the core prior to moving the winding to a second finishing and ejecting position. Once the predetermined number of windings have been applied to the core in the first position, the winding is moved with the films under tension between the core and their respective supply rolls to the second position and the films are attached to and terminated from a second core which has then been loaded into the first loading position. The first core is then rotated to wind the free ends of the film onto the core which may then be heat or otherwise sealed to complete the metallized plastic film capacitor prior to being ejected from the machine.