| 摘要 |
1,209,777. Stencilling. COMPAGNIE DE SAINT-GOBAIN. 14 Nov., 1967 [14 Nov., 1966], No. 51819/67. Addition to 1,145,367. Heading B6C. [Also in Division H5] The heatable glass sheet of the parent Specification has its resistance bands 2 initially deposited by a screen-printing process. The stencil is produced in the printing fabric by coating the fabric with a light-sensitive copying solution, which is exposed to light through a diapositive corresponding to the printed pattern, hardened in the areas exposed and washed out in the unexposed areas. The printing fabric is held with its threads at an angle of between 14 and 76 degrees, preferably 45 degrees, to the bands when printed. Since the meshes are either completely closed or fully open, the bands formed from this fabric have regularly spaced projections along their sides forming a sawtooth outline, Fig. 2. Since electrodeposition favours such projections, the reinforcing conductive coating thereafter formed is uniform. The fabric is adhered to a printing frame 10 with the threads running diagonally thereof and is evenly tensioned by pumping up a rubber tube (12) fitted in a channel 11 around the frame. |
