JPH0447158Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a sheet feeding mechanism for a thermal transfer printer.

(Prior art) Conventionally, the sheet feeding mechanism of a thermal transfer printer uses a method in which a feeding roll is brought into pressure contact with the paper as in a normal printer. If a high material is used, the frictional force with the feed roll is insufficient, causing slippage, and if a material with low smoothness is used, the contact with the thermal transfer carbon paper will be poor, resulting in a decrease in the clarity of the print. It was hot.

(Problems to be solved by the invention) The purpose of this invention is to solve the above-mentioned problems. By using thermal transfer carbon paper to feed sheets, thermal transfer printing with a smooth surface can be achieved. To provide a sheet feeding mechanism for a thermal transfer printer that can reliably feed even paper.

(Means for Solving the Problems) In order to achieve the above object, the present invention feeds thermal transfer carbon paper 1 fed from a roll by superimposing it on printing paper 3 fed from a sheet holder 2, In a thermal transfer printer in which printing is performed using a thermal head 4, thermal transfer carbon paper 1 is superimposed on a part of print paper 3 on a sheet holder 2, and part of the overlapping part is overlapped on the sheet holder 2. By bringing the heating element 5 for feeding into contact with the sheet holder 2, the printing paper 3 is fed out one by one from the sheet holder 2.

(Function) Thermal transfer carbon paper 1 is made by mixing colored powder such as carbon into a wax-like resin that softens or melts when heated and coating it on thin paper. Therefore, when this is polymerized and heated on printing paper 3, At the same time as the resin melts and the carbon is transferred, the print paper 3 and the thermal transfer carbon paper 1 are bonded together.
The frictional force between the two increases, and as a result, even print paper 3 with a smooth surface can be reliably fed out from the sheet holder 2.

(Embodiment) In the embodiment shown in Fig. 1, the printing section of the thermal head 4 is provided on the sheet holder 2, and the heating element 5 of the thermal head 4 is used to feed out the printing paper 3 in order to perform predetermined printing. It was used for this purpose. This method is suitable for a case where the print area is predetermined and the printout starts from the first line of the print paper 3, as in the case of a label printer, for example. In addition, if the printing layout is not constant, an appropriate mark may be printed on the first line by using the blank space or the outside of the margin.

In the embodiment shown in FIG. 2, a heating element 5 for feeding is provided separately from a heating element 6 for normal printing. In this case as well, a mark of appropriateness or the like is printed on the edge of the print paper 3.

In either case, when a pulse current is sent to the heating element 5 by the print paper feeding signal, the transfer ink layer of the thermal transfer carbon paper 1 is melted by heat.
Ink is transferred from the thermal transfer carbon paper 1 to the printing paper 3, and friction increases due to welding of the two, so that the printing paper 3 is reliably fed out.

(Effects of the invention) As described above, the present invention is a thermal transfer printer in which thermal transfer carbon paper and printing paper are superimposed and fed, in which the thermal transfer carbon paper is superimposed on a part of the printing paper on the sheet holder. At the same time, a heating element for feeding is brought into contact with a part of the overlapping portion on the sheet holder, and when the printing paper is fed out from the sheet holder, the thermal transfer carbon paper is welded to the printing paper, thereby reducing the gap between the two. Because it increases the frictional force, thermal transfer printing paper, which is smoother than normal printing paper, can be used without slipping, and because the frictional force is not obtained by pressing. , there is an advantage that sheets of paper can be reliably fed out from the sheet holder without being fed out in an overlapping manner.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing an embodiment of the present invention;
FIG. 2 is a side sectional view showing another embodiment. 1... Heat transfer carbon paper, 2... Sheet holder, 3... Print paper, 4... Thermal head, 5... Heating element for feeding, 6... Heating element for normal printing.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A thermal transfer printer that feeds thermal transfer carbon paper fed from a roll by superimposing it on print paper fed from a sheet holder, and prints with a thermal head, The thermal transfer carbon paper is superposed on a part of the printing paper on the sheet holder, and a heating element for feeding is brought into contact with a part of the overlapping part on the sheet holder, thereby printing the printing paper one by one. A thermal transfer printer that is fed out from a sheet holder. (2) The thermal transfer printer according to claim 1, wherein the heating element for feeding also serves as a heating element for printing in a thermal head.