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1. 发明授权

US5589868A Multi-head wide-format thermal plotter 失效
标题翻译：多头宽格式热绘图仪
公开(公告)号：US5589868A
公开(公告)日：1996-12-31
申请号：US391048
申请日：1995-02-21
申请人： Harry Schofield , Paul Caron , Gary Field , Paul Follett
发明人： Harry Schofield , Paul Caron , Gary Field , Paul Follett
IPC分类号： B41J2/32 , B41J3/28 , B41J3/54
CPC分类号： B41J2/32 , B41J3/28 , B41J3/54
摘要： A wide-format thermal plotting apparatus includes a single platen roller and a plurality of thermal print heads arranged in first and second diametrically opposed rows on the platen roller, the second row having at least one more print head than the first row. More specifically, the rows are arranged in upper and lower opposed relation so that the first, or lower row supports the force applied by the upper row plus the weight of the platen roller, thereby preventing bowing thereof. A supply of print media is sequentially threaded through the first and second rows of print heads, wrapping around the platen roller so that the second or upper row is the downstream printing row. The print heads are arranged in alternating relation between the rows such that print lines of print heads in alternate rows abut or overlap each other with respect to the width of print media. Each print head is mounted for pressured engagement with the platen roller, the print heads in the second row being adjusted to have a greater engagement pressure than the print heads in the first row. The platen roller is driven so that the print media is sequentially drawn through the first and second rows of print heads. The higher number of print heads in the second, downstream row and the increased engagement pressure thereof ensures that the print media remains in contact with the platen roller during printing.
摘要翻译：宽格式热绘图装置包括单个压印辊和布置在压纸辊上的第一和第二直径相对的行中的多个热打印头，第二行具有比第一行至少多一个打印头。更具体地，行被布置成上下相对的关系，使得第一或下行支撑由上排施加的力加上压纸辊的重量，从而防止其弯曲。供应的打印介质依次穿过第一和第二排打印头，围绕压纸辊缠绕，使得第二或上排是下游印刷行。打印头在行之间以交替的关系布置，使得交替行中的打印头的打印线相对于打印介质的宽度彼此邻接或重叠。每个打印头被安装成与压纸辊压力接合，第二排中的打印头被调节成具有比第一行中的打印头更大的接合压力。驱动压纸辊，使得打印介质顺序地通过第一排和第二排打印头。第二，下游排中较多数量的打印头和增加的接合压力确保在打印期间打印介质保持与压纸辊接触。

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