Rotary offset silk screening apparatus with squeegee adjustments

Claim 1

An offset silk screening apparatus comprising, a frame rotatably mounted on a driveable shaft, a driving plate keyed to said shaft, a screen mounting collar, a continuous screen secured along its opposite edges to the peripheries of said plate and said collar, said screen having image producing areas disposed therein, a non-rotatable cover plate mounted on said shaft adjacent said mounting collar, roller means mounted on said cover plate in supporting contact with said mounting collar, means within said frame for receiving printing ink, a squeegee assembly mounted internally of said frame to force the printing ink through said image producing areas of said screen, means for varying the pressure of said squeegee assembly against said screen along a linear radial path between the axis of rotation and the periphery of said drum, said means including a cam member having a shaft passageway therethrough and mounted for rotational movement about said shaft, the axis of said cam member being eccentrically positioned relative to the axis of said shaft passageway, a squeegee mounting ring mounted circumferentially about said cam member, means for turning said cam member whereby said squeegee assembly is movably reponsive to the movement of said cam member along a linear path the extent whereof is defined by the eccentricity of said cam member, and a soft elastomeric roller rotatably mounted and positioned so that said roller periphery is in touching contact with the periphery of said screen, and a workpiece support adjacent said elastomeric roller for supporting a workpiece which may be positioned adjacent said elastomeric roller to receive the printed ink image applied to said elastomeric roller by said screen.