摘要:
A printing plate tensioning device which affords adjustable, torsional forces to accommodate various types of printing plates, e.g., metal, plastic, etc. The device comprises a curved saddle adapted to be locked to a printing press, a saddle supporting the printing plate about its outer surface and having the general shape of a sector of a hollow cylinder having a leading edge and a trailing edge, a first securing element connected to the leading edge of the saddle to secure one end portion of the printing plate, a barrel mounted to the trailing edge of said saddle and spaced apart therefrom, and having a second securing means attached thereto for securing the other end portion of the printing plate, a stranded member situated within said barrel along its length, and being defined by a section of a multiplicity of closely spaced filaments, one end of the section coupled to said barrel and its other end being releasably connected to the saddle, and a restraining element associated with said barrel for restraining the rotation of said barrel while said stranded member is being rotated, whereby the stranded member imparts torsional tensioning force to the barrel when in a plate locked position.
摘要:
Continuously molding heat curable thermoplastic material into a strip of definite desired cross-section shape and area with means including a cure die in the form of an elongated tube having an entrance end and an exit end and a cross-section similar in shape to the desired shape and greater in area than the cross-sectional area of the desired strip, said cure die including heating means, an extrusion die spaced from the entrance end of said tube and having a cross-sectional area less than the cross-sectional area of said cure die but greater than or equal to the desired crosssectional area of the strip, a lubricating die including means for dispensing lubricant upon said strip, said lubricating die connecting said forming die with said entrance end of said cure die and having a passageway defined therein with a crosssectional area greater than the cross-sectional area of said cure die.