| 摘要 |
1,029,819. Laminates and laminating. EASTMAN KODAK CO. Nov. 15, 1962 [Nov. 24, 1961], No. 43181/62. Heading B5N. A laminated tape structure 10 comprises a tape 11, of e.g. a paper or polyester film coated with a pressure-sensitive adhesive, laminated to a carrier tape 12 of e.g. kraft paper. The carrier tape 12 is punched with a series of rectangular apertures 20 in which are positioned smaller rectangular portions 21 of the same material as the tape so that a hollow rectangular frame 22 of adhesive material is exposed. The exposed surfaces may be protected by a foil 13 of a material such as glassine paper, which is removed prior to applying the frame 22 to the required surface. The frame 22 is cut with two pairs of longitudinal slits 25 and 26 and then with transverse slits 27 prior to application to the required surface so as to form a detachable frame comprising four parts (Fig. 3, not shown. In one embodiment a rectangular piece is punched from tape 12 and transferred to tape 11, the aperture in tape 12 then being enlarged and the two tapes laminated together so that the piece initially removed from tape 12 is positioned centrally in the enlarged aperture of said tape the whole then being covered by a tape 13. In a further embodiment the central piece, i.e. 21, and a surrounding frame are punched out simultaneously. The central piece is then transferred to the adhesive tape 11, the frame piece removed from tape 12 to leave an enlarged aperture therein, and tapes 11 and 12 laminated together with the piece 21 centred in the enlarged aperture of tape 12. Apparatus for making is described (Fig. 4, not shown). |
