Methods and apparatus for improved thermal printing

    公开(公告)号:US06452620B1

    公开(公告)日:2002-09-17

    申请号:US09288428

    申请日:1999-04-08

    IPC分类号: B41J2325

    CPC分类号: B41J25/316

    摘要: Disclosed are the following: a wide format thermal printer for printing a multicolor graphic product on a printing sheet; a vacuum workbed for supporting a sheet material for performing work operations, such as cutting, printing or plotting, thereon; a replaceable donor sheet assembly, which includes a memory, for use with a thermal printer; methods and apparatus for improved thermal printing, including methods and apparatus for conserving donor sheet and reducing the amount of time required to print a multicolor graphic product; a thermal printhead including a memory; and methods and apparatus for the alignment of a sheet material for printing or performing other work operations on the sheet material. The wide format thermal printer can include provision for the automatic loading of cassettes of donor sheet from a cassette storage rack. The vacuum workbed can include provision for determining the size of the sheet material supported by the workbed, and for controlling the suction applied to the apertures in a worksurface of the workbed. Also disclosed are methods and apparatus for controlling the tension of the donor sheet during printing with a wide format thermal printer.

    Apparatus for making graphic products having a calibrated print head,
and method of calibrating same
    2.
    发明授权
    Apparatus for making graphic products having a calibrated print head, and method of calibrating same 失效
    用于制造具有校准打印头的图形产品的装置及其校准方法

    公开(公告)号:US5724084A

    公开(公告)日:1998-03-03

    申请号:US567304

    申请日:1995-12-05

    摘要: In an apparatus for printing graphic images on sheet material. The thermal print head has a linear array of heating elements extending in the y-coordinate direction, and is movable between a home position and a command position in that direction for printing graphic images wider than the length of the linear array. With the print head in the home position, a first group of heating elements at the upper end of the print head are actuated to print a plurality of first indicia equally spaced relative to each other in the y-coordinate direction. The print head is then moved upwardly in the y-coordinate direction to the command position whereby a second group of heating elements at the lower end of the print head overlap the first indicia. The print head then prints a plurality of second indicia in the spaces defined between adjacent first indicia with the second group of heating elements, and the print head is moved incrementally in the y-coordinate direction between printing sequential second indicia. The second indicia equally spaced between adjacent first indicia is then selected, and the command position of the print head is adjusted based on its total incremental movement corresponding to the selected second indicia to calibrate the movement of the print head in the y-coordinate direction.

    摘要翻译: 在用于在片材上印刷图形图像的装置。 热打印头具有在y坐标方向上延伸的加热元件的线性阵列,并且可以在原始位置和在该方向上的指令位置之间移动以打印比线性阵列的长度更宽的图形图像。 在打印头处于原始位置的情况下,致动打印头上端的第一组加热元件,以打印在y坐标方向上彼此相等间隔的多个第一标记。 然后打印头沿y坐标方向向上移动到指令位置,由此打印头下端的第二组加热元件与第一标记重叠。 然后,打印头在相邻的第一标记与第二组加热元件之间的空间中打印多个第二标记,并且打印头在打印顺序的第二标记之间沿y坐标方向逐渐移动。 然后选择在相邻的第一标记之间相等间隔的第二标记,并且基于其对应于所选择的第二标记的总增量移动来调整打印头的命令位置,以校准打印头在y坐标方向上的运动。

    Method and apparatus for generating a verified plot
    4.
    发明授权
    Method and apparatus for generating a verified plot 失效
    生成验证图的方法和装置

    公开(公告)号:US4435674A

    公开(公告)日:1984-03-06

    申请号:US308667

    申请日:1981-10-05

    CPC分类号: G06K15/22

    摘要: An automatically controlled plotter that generates graphic information on recording material in response to a plot program includes an optical sensor for detecting the traces or lines that are generated in the plot on the recording medium. The detected lines are compared with the programmed lines to establish if an omission or gap exists, and where there is a gap, the plotting process is interrupted or the program is repeated to retrace the defective portion of the plot, or the defect can be recorded for subsequent correction.

    摘要翻译: 响应于绘图程序生成关于记录材料的图形信息的自动控制绘图仪包括用于检测记录介质上绘图中产生的迹线或线的光学传感器。 将检测到的线路与编程线路进行比较以确定是否存在省略或间隙,并且如果存在间隙,则绘图过程被中断或重复程序以回溯绘图的缺陷部分,或者可以记录缺陷 用于后续校正。

    Method and apparatus for cutting sheet material with preprocessed data
    7.
    发明授权
    Method and apparatus for cutting sheet material with preprocessed data 失效
    用预处理数据切割片材的方法和装置

    公开(公告)号:US4327615A

    公开(公告)日:1982-05-04

    申请号:US146659

    申请日:1980-05-05

    摘要: A method and apparatus for cutting multi-ply layups of limp sheet material employs an automatically controlled machine with a knife blade and a controller for guiding the blade along cutting paths defined by a marker of pattern pieces. The marker contains a plurality of pattern pieces in a closely packed array which causes the pattern pieces and segments of the cutting paths to be in contact or in close proximity to one another, and makes accurate cutting difficult or impossible. Digitized data defining a cutting program for the marker is preprocessed in a data processor to identify critical segments of cutting paths where cutting difficulties may arise and introduces into the data remedial command signals that guide the cutting blade past the identified critical segments for more accurate cutting.

    摘要翻译: 用于切割跛脚片材的多层叠层的方法和装置采用具有刀片的自动控制机器和用于沿着由图案片的标记器限定的切割路径引导刀片的控制器。 标记包含紧密堆叠的阵列中的多个图案片,其使得切割路径的图案片和片段彼此接触或彼此靠近,并且使得精确切割变得困难或不可能。 定义用于标记的切割程序的数字化数据在数据处理器中进行预处理,以识别可能出现切割困难的切割路径的关键段,并将其引入数据补救指令信号,以引导切割刀片超过所识别的临界段以进行更精确的切割。

    Replaceable donor sheet assembly with memory for use with a thermal printer
    8.
    发明授权
    Replaceable donor sheet assembly with memory for use with a thermal printer 失效
    可替换的供体片组件,带有用于热敏打印机的存储器

    公开(公告)号:US06603497B2

    公开(公告)日:2003-08-05

    申请号:US09726293

    申请日:2000-11-30

    IPC分类号: G01D1516

    CPC分类号: B41J25/316

    摘要: A wide format thermal printer for printing a multicolor graphic product on a printing sheet; a vacuum workbed for supporting a sheet material for performing work operations, such as cutting, printing or plotting, thereon; a replaceable donor sheet assembly, which includes a memory, for use with a thermal printer; methods and apparatus for improved thermal printing, including methods and apparatus for conserving donor sheet and reducing the amount of time required to print a multicolor graphic product; a thermal printhead including a memory; methods and apparatus for the alignment of a sheet material for printing or performing other work operations on the sheet material; and methods and apparatus for controlling the tension of the donor sheet during printing with a wide format thermal printer. The wide format thermal printer can include provision for the automatic loading of cassettes of donor sheet from a cassette storage rack. The vacuum workbed can include provision for determining the size of the sheet material supported by the workbed, and for controlling the suction applied to the apparatus in a worksurface of the workbed.

    摘要翻译: 用于在打印纸上打印多色图形产品的宽格式热敏打印机; 用于支撑用于执行诸如切割,印刷或绘图之类的工作操作的片材的真空工作台; 可替换的供体片组件,其包括与热敏打印机一起使用的存储器; 用于改进热敏打印的方法和装置,包括用于保存供体薄片并减少打印多色图形产品所需的时间量的方法和装置; 包括存储器的热打印头; 用于在片材上打印或执行其他工作操作的片材的对准的方法和装置; 以及在用宽格式热敏打印机打印期间控制供体片张力的方法和装置。 宽幅热敏打印机可以包括用于从盒式存储架自动装载供体片的盒的设置。 真空工作台可以包括用于确定由工作台支撑的片材的尺寸,以及用于控制在工作台的工作面中施加到设备上的抽吸。