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Printing units for thermal or thermal transfer printers

A thermal transfer printer and printing device technology, applied in printing and other directions, can solve the problems of slow speed and can only print monochrome graphics and texts, and achieve the effects of improving printing quality, shortening heating time, and increasing moving speed

Active Publication Date: 2017-03-01
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to solve the problems in the prior art that thermal or thermal transfer printing methods are slow and can only print monochrome images and texts, a printing device for thermal or thermal transfer printers is provided. This printing device has a reasonable structure and high printing speed. Fast, graphics and text printing that can be used in a variety of color levels

Method used

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  • Printing units for thermal or thermal transfer printers
  • Printing units for thermal or thermal transfer printers
  • Printing units for thermal or thermal transfer printers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The printing device of the thermal printer, the print head is composed of three thermal print heads 111, 222, 333 arranged in parallel, and the three pressing rubber rollers 2, 3, 7 are installed on the frame through bearings, and the pressing rubber rollers will print The medium 4 is pressed tightly on the print head; the pressing rubber roller is driven by a motor. Preheating zones 51, 52, and 53 are respectively provided at the paper feeding ends of the three printing heads, and the preheating zones are installed on the paper guide plates 141, 142, 143, and the heating chips used in the preheating zones are ceramic heating chips.

[0036] The ceramic heater preheats the passing printing media to an appropriate temperature and maintains a constant temperature. The temperature needs to be set according to the specific printing medium, generally higher than the ambient temperature but far lower than the temperature required for normal printing of the medium, so as to in...

Embodiment 2

[0041]The difference from Embodiment 1 is that dual print heads are used in this embodiment, and the print heads are composed of two thermal print heads 222, 333 arranged in parallel, and pressing rubber rollers 2, 3 are respectively arranged at the print heads, and the driving Gear 1 is connected with the driving motor, and the driving gear meshes with the outer ring gears of the two one-way bearing gears 22, 33. The pinch rubber roller of the print head is fixedly connected.

[0042] Because the inner and outer rings of the two one-way bearing gears 22 and 33 engage in opposite directions, when the driving gear rotates counterclockwise, the outer ring of the second one-way bearing gear 22 on the left side rotates clockwise, and its inner ring engages the driven; , the outer ring of the first one-way bearing gear 33 on the right side also rotates clockwise, and its inner ring disengages and rotates freely when the clockwise rotating speed is lower than the outer ring.

[004...

Embodiment 3

[0048] Different from Embodiment 2, this embodiment is a printing device of a thermal transfer printer. There is a carbon ribbon 6 passing between the printing medium 4 and the print head, and the ink on the carbon ribbon is transferred by heating the semiconductor print head. onto the print medium 4 to complete the printout.

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Abstract

Disclosed is a printing device of a thermosensitive and thermal-transfer-printing printer. Print heads include a plurality of thermosensitive print heads which are arrayed in parallel. Pressing rubber rolls are arranged at the print heads. The pressing rubber rollers are used for pressing a print medium which passes the print heads on the print heads tightly. The pressing rubber rolls are installed on a rack through bearings. The pressing rubber rolls are connected with a driving motor. Paper inlet ends of the print heads at paper guiding rails are provided with pre-heating areas. Each print point on the print medium is accumulatively completed through repeated printing of heating elements which belong to the print heads respectively so that heating time of each heating element is shortened and thus a movement speed, at which the print medium passes the printer, is improved and work efficiency of printing is improved and at the same time, pictures and text of gray level can be printed at the same time.

Description

technical field [0001] The present invention relates to a printing device for a thermal or thermal transfer printer. Background technique [0002] For thermal printers, semiconductor heating elements are installed on the print head. After the print head is heated and touches the thermal paper, it can print the required graphics and text. [0003] The core component of a thermal printer is the thermal print head. The thermal print head is equipped with dense, equidistant, and linearly distributed semiconductor heating elements. The density of common heating elements is between 200-600 dots / inch. Each heating element can be independently controlled to generate a high temperature of more than 200°C instantly. . When the printer is working, the heating element of the thermal print head is close to the surface of the printing medium and moves in a direction that is not parallel to the distribution line of the heating element. [0004] The printing medium of a thermal printer c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41J2/32B41J2/34
Inventor 胥芳占红武
Owner ZHEJIANG UNIV OF TECH