JPH0445829B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a roller-like roller made of a heat-resistant elastic material whose surface is heated by a heating means, the toner image formed on the toner image forming body being rotated in pressure contact with the toner image forming body. Regarding a recording device that transfers the toner image onto an intermediate transfer body, and then retransfers and fixes the transferred toner image onto recording paper that is fed by pressing against the intermediate transfer body, for details, see the cleaning effect on the surface of the intermediate transfer body after retransfer and fixation. improve.

Conventionally, when the intermediate transfer body of the above-mentioned recording device is a heating roller coated with silicone rubber, cleaning of the intermediate transfer body by rotating a metal cylinder in contact with the intermediate transfer body has been described in US Pat. No. 3,649,992. It is also known that a metal cylinder is used as a cleaning roller for the fixing pressure roller that presses the recording paper against the intermediate photographic object.
It is known from the publication No. 50-91546. They are,
This method takes advantage of the fact that in a specific temperature range, the adhesion force of toner to metal is greater than the adhesion force to silicone rubber, fluorine-based rubber, or fluorine-based resin provided on the surface of the intermediate transfer body or fixing pressure roller. There is. However, if the cleaning roller is simply a metal cylinder or a metal roller, the surface is hard and does not fit well with the intermediate transfer member, etc., and the heat capacity is large and the temperature does not rise easily, so it is not possible to obtain a sufficiently satisfactory cleaning effect. There is a problem that it is difficult to understand.

The present invention was made for the purpose of solving this problem and providing a recording device using a roller-shaped intermediate transfer member that can obtain a sufficient cleaning effect. In a recording device in which a toner image transferred to an aura-like intermediate transfer member whose surface is heated by a heating means and is made of a heat-resistant elastic material is retransferred and fixed onto a recording paper that is fed by being in pressure contact with the intermediate transfer member. , LTV type or RTV type silicone rubber is used as the heat-resistant elastic material of the intermediate transfer body, and a roll core is provided on the surface of the intermediate transfer body between the retransfer fixing position and the pressure contact position with the toner image forming body. , a layer of heat-resistant rubber provided on the outside, and a layer with a thickness of 50~
The present invention is directed to a recording apparatus using an intermediate transfer roller, which is characterized in that it is made of a nickel layer of 200 μm and is brought into contact with a cleaning roller that rotates as a result of rotation.With this configuration, the above object is achieved.

That is, the recording device of the present invention has a thickness that is seamlessly and smoothly formed by electroforming on the surface of the intermediate transfer roller made of LTV type or RTV type silicone rubber and the heat-resistant rubber layer of the cleaning roller. difference
50 to 200 μm, so it has a small heat capacity, does not take away much heat from the intermediate transfer roller, and can easily reach the same temperature as the surface temperature of the intermediate transfer roller.
In combination with the surface of the nickel layer, which does not impair the elasticity of the heat-resistant rubber layer and has satisfactory durability, it is possible to efficiently remove the molten residual toner from the intermediate transfer roller by adhering it to the cleaning roller. This has a remarkable effect.

Hereinafter, the present invention will be explained based on the drawings.

FIG. 1 is a schematic sectional view of an electrophotographic copying machine using an intermediate transfer member, and FIG. 2 is a sectional view of the intermediate transfer member and a cleaning roller.

In FIG. 1, 1 is a photoreceptor drum rotating in the direction of the arrow, 2 is a charging device that uniformly charges the surface of the photoreceptor drum 1, and 3 is the photoreceptor drum 1 that is uniformly charged.
4 is a dry developing device that develops the formed electrostatic latent image with toner; 5 is a heat source such as an infrared lamp or a resistor device inside; A roller-shaped intermediate transfer member 5A is provided which rotates in the direction of the arrow and to which the toner image is transferred from the photosensitive drum 1, a cleaning roller 6 is provided for the intermediate transfer member, and a heat source 7A is provided inside. A fixing pressure roller rotates in the direction of the arrow, feeds the recording paper P in pressure contact with the intermediate transfer body 5, and fixes the toner image retransferred from the intermediate transfer onto the recording paper P; 8 is a cleaning roller for the fixation pressure roller 7; , 9 and 9' are feed rollers that feed the recording paper P into the contact area between the intermediate transfer body 5 and the fixing pressure roller 7;
Reference numerals 10 and 10' refer to delivery rollers that send out the recording paper on which the toner image has been fixed; 11 refers to a static eliminator that exposes the surface of the photoreceptor drum 1 after the toner image has been transferred to remove the charge; and 12 refers to the residual toner on the photoreceptor drum 1. This is a cleaning device that removes.

As shown in FIG. 2, the intermediate transfer body 5 of this copying machine has an elastic layer 5C made of silicone rubber or the like provided on the outside of a core 5B made of metal such as aluminum and provided with a heat source 5A inside. outside of
The cleaning roller 6 of the intermediate transfer body 5 has a structure in which a transfer layer 5D made of LTV type or RTV type silicone rubber is provided, and the cleaning roller 6 of the intermediate transfer body 5 is made of heat-resistant material such as silicone rubber on the outside of the roller core 6A made of metal such as aluminum. It has a structure in which a layer 6B made of rubber is provided, and a thin layer 6C formed by electroforming with a thickness of 50 to 200 μm on the outside thereof. When such an intermediate transfer body 5 and cleaning roller 6 are used, the toner image on the photosensitive drum 1 is efficiently transferred to the intermediate transfer body 5, and is also efficiently retransferred and fixed to the recording paper P, so that the toner image on the photosensitive drum 1 is efficiently transferred to the recording paper P. The toner remaining on the intermediate transfer member 5 without being removed by the fixing pressure roller 7 is removed by the thin nickel layer 6C of the cleaning roller 6, where the toner easily contacts the surface of the intermediate transfer member 5 and easily rises in temperature.
It will be efficiently removed to the surface.

As described above, according to the present invention, it is possible to efficiently clean the intermediate transfer member without providing a special heating means to the cleaning roller. Note that the toner captured by the cleaning roller may be removed by providing a removing means such as a scraping blade on the cleaning roller, but normally there is not that much toner remaining attached to the intermediate transfer member, so cleaning is not necessary. Removal by replacing the rollers is sufficient.

The present invention is applicable not only to recording devices using electrophotography but also to recording devices using electrostatic recording or magnetic recording.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of an electrophotographic copying machine using an intermediate transfer member, and FIG. 2 is a sectional view of the intermediate transfer member and a cleaning roller. 1... Photosensitive drum, 2... Charging device, 3...
Exposure device, 4...Dry developing device, 5...Intermediate transfer body, 5A...Heat source, 5B...Nuclear, 5C...Elastic layer, 5D...Transfer layer, 6...Cleaning roller, 6A...Aura core body, 6B...insulating elastic material layer, 6C...nickel thin layer, 7...fixing pressure roller, 7A...heat source, 8...cleaning roller,
9, 9'... feeding roller, 10, 10'... feeding roller, 11... static eliminator, 12... cleaning device.

Claims (1)

[Claims] 1. Recording in which a toner image is transferred to a roller-shaped intermediate transfer member whose surface is made of a heat-resistant elastic material and rotates in pressure contact with a toner image forming member and is heated by a heating means.The toner image is transferred by being pressed against the intermediate transfer member. In a recording device that retransfers and fixes onto paper, LTV type or RTV type silicone rubber is used as the heat-resistant elastic material of the intermediate transfer body, and the area from the retransfer and fixing position to the pressure contact position on the toner image forming body is There is a roll core on the surface of the intermediate transfer body between them, a layer of heat-resistant rubber provided on the outside of the roll core, and a layer of 50~50 mm thick provided on the outside by electroforming.
A recording device using an intermediate transfer roller, characterized in that it is made of a nickel layer of 200 μm and is brought into contact with a cleaning roller that rotates as a result.