Abstract: A method of forming a conductive lamina for use with and to form a bio-medical electrode device comprising the steps of providing a non-conductive base structure, providing a mixture of an electrically conductive substance and a media component, depositing the mixture onto the base structure, and curing the mixture. The method further comprises the step of mixing the electrical conductant and the media component in a closed cell, positive pressure kinetic mixer. The method further comprises the steps of combining a urethane base and a polyhydric alcohol to form the media component and delaying the mixing of the media component and the electrical conductant for a predetermined time period. In another embodiment, the method comprises the steps of combining a photo-initiator, a cross-linking agent, and low pH acrylic monomers to form a precomponent, and mixing the precomponent with the glycol to form the media component.

Abstract: Disclosure is made of an invention for a rotary electric toothbrush, of a head segment demountably attached to a body segment, and the head segment having a gear train in the top of the head segment such that the angle between the center line of the end brush and the drive shaft can be from 70.degree. to 90.degree. and a rechargeable battery and motor is contained in the body segment. The head segment is mounted on the body segment by means of raised buttons of the body segment fitting in dimples of the head segment.