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printer

A technology for printers and print heads, applied in printing, transfer materials, ink ribbons, etc., to solve problems such as ribbon breakage, print quality impact, and uncertain print quality.

Active Publication Date: 2021-07-27
VIDEOJET TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if printing is performed after the end of the ribbon spool has been disengaged from the supply spool, print quality may be affected
Similarly, if printing is performed with the portion of the ribbon that does not have ink on it adjacent to the print element, print quality may be affected
Additionally, the ribbon may be pulled during routine printer operation
Continued printing after such an event may result in poor or at least indeterminate print quality

Method used

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Examples

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Embodiment Construction

[0077] refer to figure 1 , a thermal transfer printer 1 includes an ink-carrying ribbon 2 extending between two spools (a supply spool 3 and a take-up spool 4). In use, ribbon 2 is passed from supply spool 3 to take-up spool 4 around rollers 5 , 6 , via printhead 7 mounted to printhead carriage 8 . The supply reel 3 is mounted on a reel holder 3a, which is driven by a supply reel motor 3b. Similarly, the take-up spool 4 is mounted on a take-up spool support 4a, which is driven by a take-up spool motor 4b. Each of the supply spool motor 3 b and the take-up spool motor 4 b is controlled by a printer controller 9 . In the embodiments described herein, each of the supply spool motor 3b and the take-up spool motor 4b is a hybrid stepper motor (which is different from a variable reluctance stepper motor or a permanent magnet stepper motor). The use of a hybrid stepper motor is preferred because it gives a higher resolution than other types of stepper motors (typically 1.8 degrees...

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PUM

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Abstract

A printhead for a thermal transfer printer, comprising: a plurality of printing elements each configured to transfer ink from an ink-carrying ribbon to a substrate; and at least one sensor, the sensor Arranged to sense the ink carrying the ribbon. The at least one sensor includes at least one emitter and a plurality of receivers, the emitters being arranged to emit radiation towards the ribbon. Each of the plurality of receivers is arranged to receive a respective reflected signal reflected by the color band, each reflected signal based on radiation emitted by the at least one emitter.

Description

technical field [0001] The present invention relates to thermal transfer printers, and more particularly, but not exclusively, to printheads for use in thermal transfer printers. Background technique [0002] Thermal transfer printers use ink to carry the ribbon. In a printing operation, the ink carried on the ribbon is transferred to the substrate to be printed. To effect transfer of the ink, the printhead is brought into contact with the ribbon, and the ribbon is brought into contact with the substrate. The printhead contains printing elements that, when heated while in contact with the ribbon, cause ink to be transferred from the ribbon and onto the substrate. Ink will be transferred from the area of ​​the ribbon adjacent to the heated printing element. An image may be printed on the substrate by selectively heating printing elements corresponding to areas of the image that require ink to be transferred and not heating printing elements corresponding to areas of the im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41J35/36B41J17/36B41J31/14B41J31/16
CPCB41J35/36B41J17/36B41J31/14B41J31/16B41J2202/15B41J2/325
Inventor J.埃利斯K.布克斯顿
Owner VIDEOJET TECH INC
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