GB777022A - Silk-screen printing machine - Google Patents

Abstract

777,022. Stencilling-apparatus. ARGON SERVICE, Ltd.. Nov. 14, 1955 [March 1, 1955], No. 32541/55. Classes 100(1) and 100(2) A silk-screen printing machine comprises a fixed support, a printing table movably mounted upon the support, a pair of arms for connection to a screen frame mounted for rotation with an movement along a shaft rotatably mounted in bearings movable at right-angles to the shaft in guide tracks on the fixed support, and means for locking the arms to the shaft in desired positions. The screen frame 2, Fig. 1, is supported on arms 4 adjustable on a shaft 7 according to the width of the screen. The shaft 7 is mounted in bearings 8 slidable and lockable in guide tracks 40, according to the length of the screen. The bearings 8 are adjustable vertically by means of screws 14, and the height of the front of the frame 2 is also adjustable vertically by a screw 23, according to the thickness of the article to be printed on. The shaft 7 has frusto-conical ends held in complementary recesses in the bearings with a pressure and braking effect adjustable by screws 22. A bar 10 biases the screen away from the printing table 1. The table 1 is perforated, and below it is a chamber connected to a source of suction through a valve which is closed through the medium of a Bowden cable when the raising of the screen rotates the shaft 7, so as to cut off the suction. Registering sheets. Sheets to be printed are registered against stops each comprising an outer cylinder 26, Figs. 1 and 4, open at the top and secured in and flush with the surface of the table, and an inner' cylinder 28 open at the bottom, a spring 29 urging the cylinder 28 up to the position shown, whence it is forced down flush with the table by the screen frame when the latter is lowered.