Patent GB-756133-A (GB)
Title: Silk screen printing machine
IPC: B41F15/08
Filed: 1954-10-28
Abstract: 756,133. Stencilling apparatus. DUBUIT, L. G. Oct. 28, 1954 (Nov. 2, 1953; Oct. 20, 1954], No. 31218/54. Class 100 (2). Apparatus for stencilling cylindrical bodies, wherein the silk screen is reciprocated linearly below a squeegee and above means for bringing the bodies to and from the printing position, comprises means for placing each body at the moment of printing upon rollers driven in synchronism with the screen and replacing it after printing on its original support, and an operating member which simultaneously actuates said placing means and. a squeegee operating means, so as to lower the squeegee on to the screen when the body is placed on the rollers and to raise the squeegee when the body is replaced. A driving shaft 17, Fig. 1, rotates through a belt or metal cable 26, rollers 9, 14 and through chains 35, 38 reciprocates the screen frame 37 by rollers 36 along guides 4a. The body 50 is placed on a U-rail 1 which extends beyond the frame 37 and is manually moved to printing position by means of a plate which passes through a slot in the rail 1, thereby pushing the previously stencilled body on to an extension 1a of the rail 1, which extension is pivoted on a shaft 5. A lever 15 is then raised by a handle 15a, and acts through levers 40, 42 to lower the squeegee 2 into contact with the screen 2a, through a shaft 11 and arms 12 carrying the rollers 14 to move the rollers to the left and tilt the body until it is first supported on only one flange of the rail 1 and then entirely on the rollers 14, 9, and through levers 52, 54 to tilt the rail extension 1a so as to cause the printed receptacle to slide thereoff. The shaft 17 is then set in motion to cause printing to take place, and the handle 15a when depressed to raise the squeegee, and replace the body just printed on the rail 1. In another form, Fig. 6, a hand-wheel on a shaft 93 acts through a chain and sprocket system to reciprocate the screen frame 37 and to rotate the rollers 88 supporting the body 58 for printing. Three squeegees 2 are provided in longitudinal alignment for printing on different parts of the body. The bodies 58 rest on links 57<SP>1</SP> of transporter chains C<SP>1</SP> passing over pairs of star-wheels 56 on shafts 60. One of the shafts 60 also carries a ratchet 65 hinged thereto, and a loosely mounted segment 66 formed with a lever 67 and carrying a pawl 68. A crank-arm 71 carries a cam roller 83 and is formed with a fork 70 slidable over a thimble 69 freely mounted on the shaft 60. When the lever 67 is moved counter-clockwise, a cam 84 on the segment 66 releases the roller 82, whereupon through links 72a, 72b, 74, 75, 77 the squeegees are raised, and the rollers 88, which are carried on shafts 86, 87 on cradles 851 hinged to a shaft 73 to which links 72a are also hinged, are lowered so as to lower the body 58 into printing position on to the chains. After a time delay, the pawl 68 drives the chains through one link to bring a body to printing position and another from printing position. The lever 67 is then moved clockwise to lower the squeegee and raise the rollers 88 to support and raise the body 58 in printing position.