Abstract: An apparatus for simultaneous electrical discharge treatment and adhesive application to a polymer component. The apparatus includes a jig having an electrically conductive region and a dispenser having an electrically grounded dispensing tip with a dispenser orifice which functions as an electrode as it is moved across an upper surface of the polymer component in close proximity thereto. During such movement, the tip coacts with the jig which underlies the component and to which high voltage is applied to create an electrical discharge which is directed onto the component and makes the surface thereof susceptible to bonding with adhesive applied to the component from the tip virtually simultaneously with the discharge.

Abstract: A method and apparatus for determining the contact angle of a droplet of test liquid on a substrate surface. The apparatus includes a test article support plate, a pipette for depositing a droplet of test liquid onto a substrate surface of the test article, and a lamp for projecting an image of the deposited droplet onto a projection screen with a base line of the image positioned on a horizontal axis line of the screen. The screen further has a protractor scale calibrated to read twice the normal angular value, and a rotatable reference line which upon positioning through a contact point of the droplet with the substrate surface and an apex point of the droplet farthest removed from the substrate surface directly indicates the value of the contact angle of the on the protractor scale.

Abstract: A method and apparatus adapted for the rapid, accurate and repeatable determination of contact angles of liquid droplets applied to curved substrate surfaces. The apparatus includes a support upon which an article may be mounted with the curved substrate surface facing downwardly, a pipette having a discharge end below the downwardly facing curved surface and operable for transferring a predetermined relatively small droplet of a test liquid onto the downwardly facing curved surface, and a contact angle measuring device which includes a lamp for directing a light beam across the suspended droplet such that an image thereof is projected onto a screen from which the contact angle is measurable.