JPS59186844A - Paper de-electrifying device - Google Patents

Abstract

PURPOSE:To reduce the paper jam by rotating a de-electrifying brush in the paper feed direction at the same speed or a slightly higher speed than the paper feed speed so that the de-electrifying brush does not pose an obstacle to the paper feed. CONSTITUTION:The paper 3 fed by a pair of paper feed rolls 1, 2 is de-electrified by a de-electrifying brush 5. At this time, a fitting roll 9 is driven to rotate so that the peripheral speed of the de-electrifying brush 5 is kept at the same speed or a slightly higher speed than the paper feed speed, thus the paper jam can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper defrosting device using a rough-type static eliminating brush, especially a self-discharge type static eliminating brush.

FIGS. 1 and 2 (d) are partial schematic diagrams of a paper discharge section of an electrophotographic copying machine to which a conventional paper static eliminator is applied. In FIGS. 1 and 2, 1 and 2 are a pair of paper feed rolls;
4 is a paper, 4 is a static eliminating brush mounting member, 5 self-discharge type static eliminating brushes, 6 is a ground wire of the static eliminating brush 5, ψ is connected to the projector body, and 8 is a carriage tray. As is clear from FIGS. 1 and 2, in the conventional paper static eliminator, a static eliminator brush device, in which a self-discharge type brush is attached to a static eliminator brush mounting member, is fixedly disposed close to the paper discharge side of the paper feed roller. Therefore, for example, when curled paper, thin paper, or the like is fed by the paper feed roller, the brush may become an obstacle to the movement of the paper, resulting in paper jams.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a novel paper static eliminator that significantly reduces paper binding.

FIG. 3 is a schematic diagram of an embodiment of the present invention, in which 1 and 2 are a pair of paper feed rollers, and 3 is a sheet of paper that is fed in the direction of the arrow by paper feed rollers 1 and 2. Reference numeral 9 denotes a roll for mounting a static elimination brush, and a plurality of self-discharge type static elimination brushes 5 are attached at equal intervals around the periphery of the roll. The static eliminating brush 5 is mounted and grounded by a ground wire (not shown) connected to the roll. The static eliminator brush device in the paper static eliminator of the present invention is a rotary static eliminator brush assembly fat that includes at least a roll 9 and a self-discharge type static eliminator brush attached to the outer periphery of the roll 9. Like the fixed type static elimination brush device in the conventional example shown in FIGS. 1 and 2 σ', it is disposed close to the discharge side of the paper feed roll. In the apparatus according to the embodiment of FIG. 3 having the above configuration, when the paper feed ports 1 and 2 rotate in the directions of the arrows, the feeder 13 moves in the direction of the arrows at a speed corresponding to the degree of rotation of the paper feed rollers 1 and 2. Run with At this time, the rotary type international brush device is mounted and driven to rotate the roll 9 so that the speed d of the static eliminating brush 5 is equal to or slightly higher than the paper feeding speed. Therefore, the static electricity on the paper that is fed by the paper feed roller is removed by the electricity removal brush, or in this case, the electricity removal brush rotates at approximately the same speed or at a slightly higher speed in the paper running direction, so it is possible to remove curled paper or thin paper. Even so, there is little risk that the brushes will become an obstacle when driving. Therefore, the risk of paper jams occurring can be significantly reduced.

FIG. 4 is a schematic diagram of another embodiment of the present invention, and as is clear from comparison with FIG. W was given
>+ self-discharge type brush, but the installation is as follows: roll 90-rush shaft (also used as the roll shaft of the feed roll. Therefore, compared to the embodiment shown in Fig. 3, the The mounting space of the embodiment can be saved.The brush 5 is connected to a ground wire (not shown) 1111.As the paper feed rolls 1 and 2 rotate in the direction of the arrow, the paper 3 is neutralized by the neutralization brush 5 and moves in the direction of the arrow. Paper 3 is fed in the direction of paper feed rolls l and 2.
After being ejected from the paper, there are no obstacles in the direction of travel, so there is almost no risk of paper jams even if the paper is curled or thin.

In the actual 17m example shown in FIGS. 3 and 4, one rotary 1u brush device is installed on the bottom side of the paper, but one brush device may be installed on the top side and one on the bottom side. An appropriate method for grounding the rolled and rolled shaft can be selected from among various well-known methods. The paper static eliminator of the present invention is of course applied to the paper discharge section of the electrophotographic copying machine used in the description of the embodiments, but is not limited to this example of application.

[Brief explanation of the drawing]

FIG. 1 is a schematic view of a paper discharge section of an electrophotographic copying machine to which a conventional self-discharge type static elimination brush is applied, and FIG. 2 is an enlarged view of a portion thereof. FIG. 3 is a schematic diagram of one embodiment of the present invention, and FIG. 4 is a schematic diagram of another example of actual tuna of the present invention. 1 and 2...Paper feed roll, 3...Paper, 4...
Brush installation is made of parts, 5...Self-emission type static eliminator brush, 6
...Ground wire, 9...Brush installation is by roll.

Claims (4)

[Claims] (1) A plurality of self-emitting static eliminator ILs and brushes are installed on the outer peripheral surface of the roll to form a rotating type defrosting brush device, and the rotating type static eliminator brushes are designed so that the outer peripheral speed is equal to the two-line speed for each paper. A paper static eliminator characterized by rotating at a slightly higher speed. (2) The paper static eliminator according to claim (1), wherein the rotary static eliminator brush device ↑6 is disposed close to the paper discharge side of the paper feed roll. (3) The paper static eliminator according to claim (1), wherein the roll shaft of the rotary static eliminator brush device is also used as a paper feed roll. (4) Scope No. (2) of Patent d1, which is characterized in that a rotary static eliminator brush device is placed at two locations above and below the paper.
Item Mak is the paper static eliminator described in item (3).