会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 35. 发明授权
    • Vacuum drums for printing, and duplex printers
    • 用于打印的真空鼓和双面打印机
    • US06460991B1
    • 2002-10-08
    • US09515435
    • 2000-02-29
    • Stephen TempleKeith P. ButlerHoward J. ManningMichael J. Dixon
    • Stephen TempleKeith P. ButlerHoward J. ManningMichael J. Dixon
    • B41J201
    • B41J13/226B65H5/226B65H2406/332B65H2406/3632B65H2406/41
    • A vacuum drum assembly for a printing machine has a drum with an array of passageways distributed along its length and around its periphery to permit airflow from outside the drum to inside the drum in response to reduced air pressure inside the drum. An array of valves are movable between a closed position in which that valve restricts at least one of the passageways and an open position in which the restriction of the same passageways is reduced. When a partial area of the drum is wrapped with a sheet of material, at least some of the passageway valves adjacent the edges of that area are open, and the valves for the passageways not covered by the sheet and not adjacent the edges of that area are closed. The drum open area is regulated to be small in regions where there is no paper. Accordingly, the open area of the drum is adapted to the paper shape and size and the paper position on the drum, while minimizing the required suction flow. A duplex printing machine has two such vacuum drum assemblies with their drums parallel. The air pressure inside the drums is reduced and the drums are counter-rotated. Printing material is fed to the first drum and held on the first drum by vacuum and rotated therewith. A first print head prints on one side of the material. The material is released from the first drum in a direction towards the second drum and held on the second drum by vacuum and rotated therewith. A second print head then prints on the material on the second drum. The material is then released from the second drum.
    • 用于印刷机的真空鼓组件具有滚筒,该滚筒具有沿其长度并围绕其周边分布的通道阵列,以响应于滚筒内的减小的空气压力而允许从滚筒外部到达滚筒内的气流。 一组阀可在关闭位置之间移动,在该关闭位置,该阀限制通道中的至少一个和相同通道的限制减小的打开位置。 当鼓的一部分区域被一片材料包裹时,与该区域的边缘相邻的通道阀中的至少一些是打开的,并且用于通道的阀未被片材覆盖并且不与该区域的边缘相邻 关闭。 在没有纸张的区域,鼓的开放面积被调节为小。 因此,滚筒的开口面积适应纸张的形状和尺寸以及鼓上的纸张位置,同时最小化所需的抽吸流量。 双面打印机具有两个这样的真空鼓组件,它们的鼓平行。 鼓内的空气压力减小,鼓反向旋转。 印刷材料被输送到第一滚筒并通过真空保持在第一滚筒上并随其一起旋转。 第一印刷头印在材料的一面上。 材料从朝向第二滚筒的方向从第一滚筒释放,并通过真空保持在第二滚筒上并随其一起旋转。 然后,第二打印头在第二鼓上的材料上打印。 然后将材料从第二鼓释放。