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    • 71. 发明授权
    • Vacuum frame for offset printing plates
    • 胶版真空框架
    • US4475458A
    • 1984-10-09
    • US500322
    • 1983-06-02
    • Joseph F. KennellGerald W. Clemens
    • Joseph F. KennellGerald W. Clemens
    • G03B27/20G03F7/20B41F27/00
    • G03B27/20G03F7/2014
    • A vacuum frame for holding at least one negative and a plate for exposure to intense light to transfer the negative image to the plate to fashion a printing plate. The frame has a base with a flat upper surface to support the plate and negative. A plurality of apertures are disposed about the periphery of the upper surface, the apertures communicating with a vacuum source. Overlying the upper surface and the apertures is a mesh material which defines a multiplicity of small air passages over the upper surface. The plate and negatives are supported on the mesh material and upper surface and are aligned by suitable aligning means. A flexible transparent cover is positioned over the upper surface to cover the negative, plate and mesh material. The evacuation of air through the apertures and air passages causes the cover, negative and plate to be held closely together and to the base for exposure of the plate.
    • 用于保持至少一个负片和板的真空框架用于暴露于强光以将负像转印到板上以形成印版。 该框架具有一个具有平坦的上表面的基座,以支撑该板和负极。 围绕上表面的周边布置有多个孔,孔与真空源连通。 覆盖上表面和孔是网格材料,其在上表面上限定多个小空气通道。 平板和底片支撑在网状材料和上表面上,并通过合适的对准装置对准。 柔性透明盖定位在上表面上以覆盖负片,板和网格材料。 通过孔和空气通道抽空空气使得盖,负片和板被紧密地保持在一起,并且与底座紧贴,以暴露板。
    • 74. 发明授权
    • Blanket clamping apparatus
    • 毯子夹紧装置
    • US4122774A
    • 1978-10-31
    • US800115
    • 1977-05-24
    • Hartmut K. Sauer
    • Hartmut K. Sauer
    • B41F13/18B41F27/12B41F30/04B41F27/00
    • B41F30/04B41F27/1237
    • A blanket clamping and tensioning apparatus for use in a blanket cylinder in a rotary printing press is disclosed. An axial groove at the periphery of the blanket cylinder carries a pair of spaced inserts which define an interior chamber. A radially movable clamping bar assembly is carried within the chamber and contacts camming surfaces on the inserts. The ends of the blanket are inserted in the space between the inserts and the clamping bar assembly is moved radially inwardly thereby camming clamping means toward each other to grip the blanket. Four embodiments are disclosed in which there are shown different gripping portions of the clamping bar assemblies.
    • 公开了一种用于旋转印刷机中的橡皮滚筒中的橡皮布夹紧和张紧装置。 橡皮布圆筒周边的轴向槽承载一对限定内腔的间隔开的插入件。 径向可移动的夹紧杆组件在腔室内承载并接触插入件上的凸轮表面。 橡皮布的端部插入到插入件之间的空间中,并且夹紧杆组件径向向内移动,从而将夹紧装置朝向彼此夹紧以夹持毯子。 公开了四个实施例,其中示出了夹紧杆组件的不同夹持部分。
    • 75. 发明授权
    • Printing press with removable printing roll sleeve
    • 印刷机可拆卸印刷辊筒
    • US4119032A
    • 1978-10-10
    • US801347
    • 1977-05-27
    • Richard John Hollis
    • Richard John Hollis
    • B41F27/00B41F13/20B41F13/24B41F27/10
    • B41F27/105B41F13/20B41P2217/15
    • A printing roll is mounted in a printing machine in such a way that a sleeve on its outer surface can be removed axially while the roll remains substantially in its working position. One end bearing of the roll is free of axial restraint relative to the roll and is removably secured to a side frame of the machine. For axial positioning, an adjustable restrainer engages the roll axle at that end. Beyond the other side frame a counterpoise acts on the roll axle to support the roll when the one end bearing is removed. The counterpoise may be a hydraulically operated pull roll, permanently engaged to the roll axle through a yoke and a rolling contact bearing.
    • 印刷辊安装在印刷机中,使得其外表面上的套筒可以轴向地移除,同时辊保持基本上处于其工作位置。 辊的一端轴承相对于辊没有轴向约束,并且可移除地固定到机器的侧框架上。 对于轴向定位,可调限制器在该端接合辊轴。 在另一侧框架之外,当移除一端轴承时,平衡杆作用在辊轴上以支撑辊。 平衡阀可以是液压操作的拉辊,通过轭和滚动接触轴承永久地接合到辊轴。