JPS5941285A - Impact-type printer - Google Patents

Abstract

PURPOSE:To increase printed density without increasing the load on the side of a printing head and enable to easily form a plurality of copies, by driving a platen to rotate at the time of a printing action. CONSTITUTION:An impact-type printing head 3 (wire system, type ball system or the like) is fitted on a carriage 2 slidably fitted to guide shafts 1, 1, and a rigid rubber made cylindrical platen 4 driven to rotate at the time of printing is provided in front of the head 3 (numeral 5 denotes a recording paper, and numeral 6 denotes an ink ribbon). When a driving current is impressed on the head 3, a printing element (not shown) strongly pressed the ink ribbon 6 and the recording paper 4 against the platen 4, thereby printing on the paper 5, and simultaneously, the platen 4 is rotated in the direction of the arrow, whereby the paper 5 and the ribbon 6 are rubbed against the printing element, resulting in an increase in the printed density.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an impact printer that performs impulsive printing using, for example, a wire print head.

Impact printers have the advantage of being able to make multiple copies at the same time, but in order to increase this copying capacity (number of copies), printing energy has been reduced by applying a large current to the print head. I had no choice but to make it bigger. Therefore, (2) the print head generates more heat; (3) heavy-duty printing is not possible.

(4) The life of the spatula will be shortened. There were drawbacks such as:

The present invention was invented in view of the above-mentioned circumstances, and is characterized in that printing energy is supplied from outside the print head.

By way of example, an impact print head 3 is mounted on a carriage 2 which is slidably received on a guide shaft 1.1. The print head 6 may be of a well-known type, such as a wire type, type ball type, or petal type type wheel type, as appropriate. A cylindrical platen 4 is arranged in front of the print head 3, and a recording paper 5 is passed between them. 6 is an ink ribbon. The platen 4 is made of, for example, hard rubber, and
When the print head 3 prints, it is rotationally driven.

When a drive current is applied to the print head 3, its printing element (not shown) strongly presses the ink ribbon 6 and the recording paper 5 against the platen 4, thereby printing on the recording paper 5. is the ink ribbon 6 and the recording paper 5
At the moment when is pressed against the platen 4, the platen 4 rotates to rub the recording paper 5 and the ink ribbon 6 against the printing element. The resulting print results are darker than those obtained using a conventional stationary platen, and when a plurality of copies are made simultaneously, the number of copies can be increased. This means that platen 4
The idea is that a part of the rotational energy is used for printing energy. Note that the recording paper 5 is line-broken by a paper feeding device (not shown).

According to the present invention described above, it is possible to increase printing energy without applying a large drive current, so it is possible to increase the copying performance by reducing the power consumption by 9! Problems such as an increase in IT force and heat generation of the head do not occur, thereby making it possible to perform heavy duty printing without causing a decrease in the life of the head. When printing on a single sheet of recording paper, only a small drive current is required to form characters with the same density as before.

[Brief explanation of drawings] The drawing is a sectional view showing an embodiment of the present invention. 6...Print head 4...Platen 5... Recording paper that's all Applicant Seikosha Co., Ltd.

Claims (1)

[Claims] An impact type printer characterized in that a platen facing an impact type print head via recording paper is rotationally driven during a printing operation.