JPS60201977A - Meandering preventing device for thermal transfer carbon ribbon - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Field of Application of the Invention) The present invention relates to a meandering prevention device for a thermal transfer carbon ribbon (hereinafter simply referred to as "R ribbon") used in a thermal transfer printer, and particularly relates to a meandering prevention device for a thermal transfer carbon ribbon (hereinafter simply referred to as "R ribbon") used in a thermal transfer printer. The present invention relates to a meandering prevention device for thermal transfer carbon ribbon, which absorbs the tension and prevents meandering by using an averaged tension.

・In general, thermal transfer thermal printers sandwich a ribbon and a print medium such as a label between a thermal head and a platen, and print using the required print signal, but the heat in the thermal head during printing is Due to other factors, the ribbon expands and contracts unevenly, and the tension in the width direction is -”A
If the ribbon does not become L, or the tension of the ribbon puller is not constant due to assembly precision etc., the ribbon may meander or
There are problems such as wrinkles occurring and affecting printing accuracy or ribbon running.

Furthermore, depending on the printer, it is necessary to print on labels of various widths, so several types of ribbons are required, and there is also the problem that a meandering prevention device compatible with ribbons of different widths is required.

(Objective of the Invention) The present invention was made in view of these problems, and it is possible to accurately prevent ribbon meandering in response to changes in tension in the width direction of the ribbon or ribbons of different widths. This invention relates to a meandering prevention device for thermal transfer carbon ribbon. (Summary of the Invention) That is, the present invention forms the free edge of the correction plate into a comb-like shape, and by elastically abutting the free edge against the ribbon, the tension difference in the width direction can be equalized. This is a meandering prevention device for thermal transfer carbon ribbon.

(Example) Next, one embodiment of the present invention will be described based on the drawings.

The ribbon 1 is held in a roll on a supply shaft 2, passes through a guide shaft 3.4, is sandwiched together with a label 7 between a platen 5 and a thermal heave, and is placed on a pressure roller 8.
The film is then wound up by a predetermined winding mechanism (not shown). Further, the label 7 is also wound up by a predetermined winding mechanism (not shown).

A first correction plate I.9 made of metal is provided near the supply shaft 2, and a second correction plate 10 also made of metal is provided near the thermal head 6. The first and second correction plates 9 and 10 each have one end edge 11, 12 fixed to the printer frame (not shown), and each free end edge 13, 14 is bent into a U-shape. 1j is in contact with the ribbon 1 on the running path of the ribbon 1 so as to apply a predetermined elastic force (arrow) to the ribbon 1.

Free edges 13 of these first and second correction plates 9.10
．． 14 is formed into a comb-teeth shape as shown in FIG. 2, and a plurality of elastic pieces 15 in the width direction thereof can be deformed independently of each other.

Next, the effect will be explained.

While the ribbon l is supplied from the supply shaft 2 to the printing area and runs, the ribbon pull-out tension varies depending on the size of the ribbon winding diameter.
The elasticity of the first correction plate 9 makes it possible to maintain a uniform drawing tension at the start of supply. Moreover, even when the tension changes in the width direction of the ribbon 1, each elastic piece 15 can be deformed independently, so that the tension in the width direction of the ribbon 1 can be averaged.

Further, the tension in the second correction plate 10 is also averaged in the width direction in the same manner as in the first correction plate 9. However, since the second correction play 1-10 is close to the thermal head 6, the ribbon l itself expands and contracts more greatly due to the heat of the thermal head 6.
5 can be deformed independently to average the tension in the width direction.

Furthermore, even when ribbons l are used with different widths, a correction plate 9 corresponding to the maximum width ribbon is provided. to'11X4ii
l If you do this, each time you use a ribbon of each line width, add 11,
There is no need to replace the plate, and the widthwise tension can be reduced to 111
Equalization is possible.

In addition, in the unimplemented example, two correction plates were installed near the supply shaft and near the thermal head, so it was possible to deal with two types of tension fluctuation causes on the supply shaft side and the printing part side. One or three or more may be provided in the path 1.

Further, the width, length, shape, etc. of the elastic piece can be formed arbitrarily depending on the location, the elastic force applied, the material of the ribbon and the correction plate, etc.

(Effect of the invention) As described above, according to the invention, not only can the tension in the running direction of the thermal transfer carbon ribbon be averaged by the elastic deformation of the entire correction plate, but also the change in tension in the width direction can be accurately controlled by the elastic piece. Since the material can be absorbed, a simple structure is highly effective in preventing ribbon meandering caused by changes in tension, especially in the width direction.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of an embodiment of the present invention. FIG. 2 is an illustration of hemostasis at the free edge of the correction plate. Explanation of symbols ■+10Φ ribbon 5... platen 6...Thermal head 9th correction plate lO...Second correction plate゛ 11.12...Fixed edge □ 13.14Φ・・Free edge 15...Elastic piece Patent applicant: SATO Co., Ltd.

Claims (1)

[Claims] Running of the thermal transfer carbon ribbon - One edge of the correction plate is fixed on the road, and the other end of the correction plate is formed into a comb-like shape, and this free edge is held in contact with the thermal transfer carbon ribbon. Features a meandering prevention device for thermal transfer carphone ribbons.