| 摘要 |
1,127,043. Ferromagnetic coatings. PORTALS Ltd., A. J. TOOTH and J. A. THORP. 24 Jan., 1967 [28 Jan., 1966], No. 3992/66. Heading B2E. [Also in Division D2] A base sheet of Cellophane (Registered Trade Mark), glass, alginate, plastics material, silk, cotton or natural or synthetic paper is coated with ferromagnetic material by dipping, vacuum deposition or electrodeposition. The magnetic coating may be powdered magnetic iron oxide in a carrier such as sodium carboxymethyl cellulose or cellulose acetate solutions. An unspecified adhesive may be used too. The magnetic coating may be discontinuous, or as bands of different unspecified ferromagnetic materials with differing magnetic properties, the bands being deposited successively on the base, or the magnetic coating may be printed as a design or letters. The coating and base may be subsequently coated on both sides with opaque white pigmented ink. |
