公开(公告)号：US4968164A

公开(公告)日：1990-11-06

申请号：US412804

申请日：1989-09-27

申请人： Guy Chevrollier ,  Olivier Dardenne ,  Jean M. Ciccone

发明人： Guy Chevrollier ,  Olivier Dardenne ,  Jean M. Ciccone

IPC分类号： B41J13/02 ,  B41J13/03 ,  B41J13/036 ,  B41J15/16

CPC分类号： B41J13/03 ,  B41J13/025 ,  B41J13/036 ,  B41J15/16

摘要： A printing assembly which is adapted for printing on a print medium in a m of a sheet or tape includes a printing cylinder on which is wound and urged the print medium during a printing operation. A printing device prints on the print medium and urges it against the printing cylinder. An advancing device upstream of the printing device serves to advance the print medium and a tensioning device downstream of the printing devices tightens the print medium against the printing cylinder. The tensioning device includes two contra-rotating rollers having substantially smooth outer surfaces in contact from opposite sides of the print medium which allow sliding at the contacting surfaces and which provide for tensioning of the print medium on the print cylinder. The rollers are of the same diameter and are both motorpowered and driven at the same rotational velocity, which rotational velocity is greater than the advance velocity of the advancing device. The tensioning device also includes a mechanism for pulling the rollers elastically towards each other with forces which are substantially constant and identical.

摘要翻译： 适于在片材或胶带形式的打印介质上进行打印的打印组件包括印刷滚筒，打印滚筒在打印操作期间卷绕并推动打印介质。 打印设备在打印介质上打印并将其推向印刷滚筒。 打印装置上游的推进装置用于推进打印介质，并且打印装置下游的张紧装置将打印介质紧靠印刷滚筒拧紧。 张紧装置包括两个反转辊，其具有从打印介质的相对侧接触的基本平滑的外表面，其允许在接触表面处滑动并且提供打印介质在印刷滚筒上的张紧。 滚子具有相同的直径并且以相同的旋转速度被驱动和驱动，该旋转速度大于推进装置的提前速度。 张紧装置还包括用大体上恒定且相同的力将辊子彼此弹性拉动的机构。