专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

2. 发明公开

EP0253618A1 Thermal printing apparatus and method 失效
标题翻译： Thermodruckapparat und -verfahren。
公开(公告)号：EP0253618A1
公开(公告)日：1988-01-20
申请号：EP87306198.0
申请日：1987-07-14
申请人： NCR CANADA LTD - NCR CANADA LTEE
发明人： Brooks, Ralf Maynard , Connell, Brian Paul , Sonnenburg, Dennis Tim , Pagowski, Stefan Jerry
IPC分类号： B41J33/16 , B41J2/325 , G01D15/10
CPC分类号： B41J2/325 , B41J33/36
摘要： A thermal printing apparatus includes a print head (56) arranged to be moved in a printing direction relative to a document (34) to be printed on during a printing operation. A take-up spool (66) for a thermal transfer ribbon (52) is driven by a stepping motor (82) which causes the ribbon to be advanced a constant amount in the printing direction following each printing operation. In order to avoid smudging of transferred ink on the document (34) and possible ribbon breakage during a printing operation, a predetermined amount of slack is introduced into the ribbon prior to a printing operation by causing a reverse rotation of the take-up spool (66). As the diameter of the coil of ribbon on the take-up spool (66) increases, the number of steps taken by the motor (82) in providing this slack progressively decreases so that substantially the same amount of slack is introduced prior to each printing operation.
摘要翻译：热敏打印设备包括打印头（56），打印头（56）布置成在打印操作期间相对于要打印的文档（34）在打印方向上移动。用于热转印色带（52）的卷取卷轴（66）由步进电机（82）驱动，这使得色带在每次打印操作之后沿打印方向前进一定量。为了避免在打印操作期间污染文件（34）上转印的墨水和可能的色带破损，在打印操作之前通过使卷取卷轴的反向旋转将预定量的松弛物引入色带（ 66）。随着卷取线轴（66）上的带状线圈的直径增加，在提供这种松弛的同时马达（82）采取的步骤数量逐渐减小，使得在每次打印之前引入基本相同量的松弛操作。

IPRDB

热门服务

关于我们

友情链接

联系方式