Method of making a line-shaped opening in a coating on a plastics foil
OwnerFerdinand H. F. G. Spieringsinventor
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Abstract
A method of applying a line-shaped opening in a coating on a plastics foil, in which a part 3 having a pointed end is moved according to a line 4 in contact with the coating 2, while the temperature of the part 3 lies in the melting range of the foil 1 and the pressure exerted on the part 3 together with the rate of movement of the part 3 is such that the coating 2 with a portion of the subjacent foil 1, considered in thickness direction, is cut through according to the line 4.
Claims2
A method of scribing a linear opening in a plastic foil having an electrically conductive coating thereon, said foil being in the form of a generally circular disc, said coating being formed along a peripheral region of said disc and from a silver suspension in a volatile solvent disposed on said peripheral region of said disc with said solvent evaporated to leave a silver deposit, comprising
- heating a first pointed part in the range of the melting temperature of said foil;
- exerting pressure on and moving said part along a circular path and in contact with said coating so that said part passes entirely through said coating and partially through said foil to form two, electrically isolated regions;
- and
- connecting separate discharge means to said electrically isolated regions at reversible electrodes formed by electrochemical surface treatment thereof with HCl to form AgCl layers thereon.
A method of scribing linear openings in a plastic foil having an electrically conductive coating thereon, said foil being in the form of a disc, said coating being formed from a silver suspension in a volatile solvent disposed on said disc with said solvent evaporated to leave a silver deposit, comprising
- heating first and second pointed parts to temperatures in the range of the melting temperature of said foil;
- exerting pressure on and moving said first and second parts along a spiral path with said second part being moved simultaneously with and parallel to, but spaced from said first part, and in contact with said coating so that said parts pass entirely through said coating and in said foil, to form two, spiral shaped electrically conductive regions which are electrically insulated from each other and which have inner and outer ends;
- and
- connecting discharge means to one end of each said region at reversible electrodes formed by electrochemical surface treatment thereof with HCl to form AgCl layers thereon.
Dependencies are inferred from the claim text.