JPH05147316A - Form running mechanism of electrophotographic printer - Google Patents

Abstract

PURPOSE:To erase the static electricity of printing paper smoothly and effectively by forming a pair of one carrying rollers in structure, in which antistatic plates are molded with a rubber integrally, and holding printing paper by a pair of the carrying rollers. CONSTITUTION:Printing paper 1 is held by a pair of carrying rollers 2, 4, and printing paper 1 is given feed and carried. One carrying roller 2 is made of aluminum, and the other carrying roller 4 is formed in structure, in which an antistatic plate 3 is molded with a rubber 5 integrally. The carrying roller 4 is manufactured concretely in such a manner that a flat section is formed on both sides of a shaft 6, antistatic plates 3 are bonded with the flat section respectively, each antistatic plate 3 is overhung in the contrary radial directions of the shaft 6, and the peripheries of the plates 3 and the shaft 6 are molded with a rubber 5. When printing paper 1 is charged with static electricity, static electricity is erased through the pointed end 3a of the plate 3 of the roller 4 brought into contact with the other surface from the roller 2 made of aluminum brought into contact with one surface of paper 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper running mechanism for an electrophotographic printer, and more particularly to an antistatic paper running mechanism.

[0002]

2. Description of the Related Art Conventionally, this type of paper traveling mechanism uses an aluminum roller and a rubber roller (NBR) as a pair of rollers, and static electricity on the paper is removed only by the conductivity of the aluminum roller.

[0003]

In the above-described conventional paper running mechanism, since the rubber roller (NBR) is used as one of the materials for the paper running roller, the static electricity charged on the paper cannot be completely removed. However, there is a problem in that the state varies and printing is hindered.

An object of the present invention is to provide a paper traveling mechanism for an electrophotographic printer in which static electricity charged on paper is efficiently removed.

[0005]

In order to achieve the above-mentioned object, a sheet traveling mechanism of an electrophotographic printer according to the present invention has a pair of conveying rollers, and the pair of conveying rollers holds a printing sheet. In a paper traveling mechanism of an electrophotographic printer that feeds and conveys the paper, one of the pair of conveyance rollers has a structure in which an antistatic plate is integrally rubber-molded. The edge is provided at a position retracted from the roller peripheral surface to the inner diameter side,
Further, it has a plurality of tips for static elimination along the length direction of the edge.

[0006]

A plurality of tips for static elimination are provided in the axial direction of the roller, and static electricity is introduced from the tips to remove them.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG.
It is the same longitudinal cross-sectional view.

In the figure, this embodiment shows a conveyance roller 2,
The printing paper 1 has a pair of 4 and a pair of conveying rollers 2 and 4.
The present invention is intended for a paper traveling mechanism of an electrophotographic printer that holds the paper and feeds the paper 1.

The one conveying roller 2 is made of aluminum.

The other carrying roller 4 has a structure in which the antistatic plate 3 is integrally rubber-molded. That is, the flat portions 6a, 6a are formed on both sides of the rotary shaft 6, and the static electricity countermeasure plates 3 are connected to the flat portions 6a, 6a, respectively, and the respective static electricity countermeasure plates 3 are projected in the radial direction of the opposite rotary shaft 6. A rubber mold 5 is formed around the plate 3 and the rotary shaft 6 to form a roller shape.

Further, the outer peripheral side edge of the plate 3 is provided at a position retracted by about 0.1 to 0.3 mm toward the inner diameter side from the roller peripheral surface, and a plurality of static elimination terminals are provided along the length of the edge. Has the tips 3a, 3a ,.

Therefore, when the print sheet 1 held by the pair of transport rollers 2 and 4 is charged with static electricity, the transport roller 2 made of aluminum comes into contact with one surface of the print sheet 1 and the static electricity is generated. To be removed.

Further, when the conveying roller 4 comes into contact with the other surface of the printing paper 1 and the plate 3 faces the printing paper 1,
The static electricity is removed through the tip 3a of the plate 3.

[0014]

As described above, according to the present invention, since the static electricity is eliminated on both sides of the printing paper, the static electricity on the paper is smoothly and effectively removed, and stable high printing quality is obtained. Can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view of the same.

[Explanation of symbols]

 1 Printing Paper 2, 4 Conveyor Roller 3 Electrostatic Countermeasure Plate 3a Plate Tip 5 Rubber Mold 6 Rotation Shaft 6a, 6a Flat Part

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location G03G 15/00 103 108 7369-2H

Claims (1)

[Claims] 1. A sheet traveling mechanism of an electrophotographic printer, comprising a pair of transport rollers, a print sheet being sandwiched by the pair of transport rollers, and being fed to the sheet for transport, the pair being one pair. The transport roller has a structure in which an antistatic plate is integrally rubber-molded.The antistatic plate is provided with one end edge retracted to the inner diameter side from the roller peripheral surface, and the length direction of the end edge A paper traveling mechanism for an electrophotographic printer, characterized by having a plurality of tips for removing static electricity.