JPH01266576A - Magnetic printer - Google Patents

Abstract

PURPOSE:To accomplish a quick start and high-quality printing by integrating a transfer fixing device and performing transfer and fixing with pressure. CONSTITUTION:In a recording stage by printing, a magnetic latent image is formed on a magnetic drum 3 with a recording head 1 in accordance with a prescribed signal. After forming the magnetic latent image, it is developed by developing device 2 to make the latent image visible and the visible image can be obtained. The visible image on the magnetic drum is rotated to be in a transfer and fixing part. At the same time paper is supplied and the transfer and fixing by a pressure roller 4 can be possible. Thus, the quick start can be accomplished and the high-quality printing, etc. obtained by faithfully reproducing the visible image which has been developed can be secured.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a printer using a magnetic method. [Prior Art] The configuration of a conventional magnetic printer is as shown in FIG. The magnetic latent image is made visible by the transfer roller 8, and the visible image is further transferred onto the paper 7 by the transfer roller 8. The transferred paper 7 passes through a heat roller 9 and is fixed. On the other hand, after the transfer has been completed, the residual toner on the magnetic drum l is removed by a cleaner 5, and the magnetic latent image is erased by a demagnetizer 6.

[Question H that the invention attempts to solve]

However, the prior art in the future has the following problems. (1) Since the number of parts that make up the device is large, the cost of the device is high. (2) Since the paper passes through multiple rollers from the paper feed section to the fixing section, there are many paper jams. (3) Since a heat roll is used for fixing, quick start is not possible. (4) Since the transfer process is performed using static electricity, scattering occurs, resulting in poor print quality. Therefore, the present invention is intended to solve these problems, and its objectives are to reduce the number of parts in the device, eliminate the heat roller, enable quick start, enable high print quality, and achieve low cost and high reliability. There is a place that provides magnetic printers.

[Means to solve the problem]

In the magnetic printer of the present invention, a recording head, a developing device, a transfer fixing device, a cleaner, and a demagnetizing section are sequentially arranged in the rotational direction of a rotatable magnetic drum, and the transfer fixing device is integrated. It is characterized in that transfer and fixing are performed by pressure.

[Embodiment 1] Figure 1 is a sectional view of the main parts in an embodiment of the present invention, in which 1 is a recording head, 2 is a developing device, 3 is a magnetic drum, and 4
5 is a pressure roller, 5 is a cleaner, and 6 is a demagnetizing section. The print recording process is carried out on the magnetic drum 3 according to a predetermined signal.
A magnetic latent image is formed thereon by the recording head 1. After the magnetic latent image is formed, the latent image is developed with a developing device 2 to make it visible. The visible image on the magnetic drum further rotates and comes to the transfer and fixing section, at which time paper is simultaneously fed and can be transferred and fixed by the pressure roller 4. The resulting magnetic printer has a resolution of -400DPI, a recording speed of -10ppm,
It has this performance, and there were only a few jam problems during the printing of 500,000 sheets. [Example 21] A magnetic printer with a pressure transfer fixing mechanism was manufactured in the same manner as in Example 1. At this time, the material of the pressure roller was changed. The pressure roller is made of engineering plastics such as PAR (boria arylate), PSF (polysulfone), PEI (polyetherimide), and P
E5 (polyetherketone), PPS (polyphenylene sulfide), t, cp (liquid crystal polymer), PE
EK (polyetheretherketone), PI (polyimide), PTES (polythioethersulfone), P
Metals such as EK (polyetherketone) include BS, iron, copper, stainless steel, and aluminum with anodized surface, and rubber-based products include silicone rubber with a rubber hardness of -70 or higher. . If we compare the products that have come before us, the best one is engineering plastic, and a comparison table is shown below. In addition, regarding the above comparison table, the Δ mark is the minimum usable limit. [Example 3] A magnetic printer with a pressure transfer fixing mechanism was manufactured in the same manner as in Example 1. At this time, we experimented by changing the applied pressure. The value varies depending on the material of the pressure roller, but it is approximately 25 Kg/cm to 50 Kg/cm.
It was best in the range of m. ■Effects of the invention] As described above, according to the invention, magnetic printer transfer,
By integrating the fixing process and using pressure,
This has many beneficial effects, such as simplification of the mechanism of the device, removal of the heat roll and quick start possible, and high print quality due to faithful reproduction of the visible image after development. Furthermore, since the magnetic material of the drum is made of a highly hard material, there is almost no problem with printing durability even if the drum diameter is reduced and the rotation speed is increased, and the device can be easily downsized. be.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing only the main parts of an embodiment of the magnetic printer of the present invention. Figure 2 is a main cross-sectional view of a conventional magnetic blink. l...Recording head 2...Developer 3...Magnetic drum 4...Pressure roller 5...Cleaner 6...Demagnetizer 7...Paper 8...Transfer roller 9... Heat roller 10...backup roller and above Applicant Seiko Epson Co., Ltd. agent Patent attorney Kisanbe Meiki (1 other person) Figure 1

Claims (1)

[Claims] In a magnetic printer in which a recording head, a developing device, a transfer fixing device, a cleaner, and a degaussing device are sequentially arranged in the rotational direction of a rotatable magnetic drum, the transfer fixing device is integrated, and the transfer fixing device is A magnetic printer that uses pressure.