JPS59227455A - Apparatus for removing paper dust or powder - Google Patents

Abstract

PURPOSE:To attain to enhance removal efficiency of paper dust or a powder, by arranging a charging mechanism for charging paper dust or a powder deposited paper or a film and a collection mechanism for separating charged paper dust or the like from the paper surface by an electric means and conveying and collecting the same by utilizing air flow. CONSTITUTION:Charge is applied to the paper dust 6 on the surface of paper 1 by a corona discharge apparatus 2 and the charged paper dust 6 is floated between an electrode 7 and a rotary electrode 9 and collected in a collection part 13 by wind force generated by rotating the rotary electrode 9. In this case, if air is sucked from a metal net 11' by a blower, the paper dust 6 can be further efficiently collected. As mentioned above, because charge is applied to paper dust by corona charge while the charge dust is separated and floated from the paper surface by an electric field and collected by air flow, the paper dust deposited on the paper can be efficiently removed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper dust/powder removing device for removing paper dust, powder, etc. adhering to the surface of a machine using film.

In conventional printing machines, paper dust or powder (a substance that is applied to the printed side of the paper to prevent ink from getting on it when stacking papers) that adheres to the surface of the printing paper is removed. I haven't done that. Therefore, when printing on paper dust, if the paper dust flies, the print quality deteriorates, such as white spots in the area, and paper dust and powder get mixed into the ink of the ink roller, increasing the frequency of cleaning the roller. It has the disadvantage that it can cause damage or cause severe damage.

The present invention has been proposed in view of the above-mentioned drawbacks of the conventional art. It is characterized by being equipped with a collection mechanism that separates the paper from the paper and transports and collects it using wind power, and its purpose is to efficiently remove paper dust or powder, etc. that has adhered to the surface of the paper or film. It is intended to provide a dust/powder removal device.

The present invention is constructed as described above, and as the paper or film is conveyed, the charging mechanism acts to charge the surface of the paper or film with electrification, and then the electric means of the collection mechanism acts to charge 1. Since paper dust and the like are separated from the surface and collected using wind power, paper dust and powder can be efficiently removed from the paper surface and various problems caused by the presence of paper dust and powder can be solved.

The present invention will now be described in detail with reference to the most preferred illustrated embodiment shown in FIG. In the figure, 1 is paper. 2 is a corona discharge device, which is composed of a sword-shaped electrode 4, a DC power source 3, and a counter electrode 5. The counter electrode 5 is grounded.

Reference numeral 6 indicates paper dust or powder stuck to the surface of the paper 1. Reference numeral 7 is a power supply placed below the travel path of the paper 1 and is connected to a DC power supply 8 having the same polarity as the DC power supply 3. 10
is a collection device. Enclosure 11° rotating room &9. Wire mesh 11'
It consists of The rotating electrode 9 is made of plasticine or a flat plate, and rotates in the direction of the arrow in the figure. or,
The tip of the rotating electrode 9 is designed to be sufficiently rounded to prevent corona discharge. Reference numeral 13 denotes a collecting section formed by the enclosures 11 and 11 for collecting filter paper powder and the like. The wire mesh 11' is the collection part 13
A fine mesh is provided at the end of the tube to release air. It is also conceivable to attach adhesive tape or porous material soaked in water to the surface of the enclosure 11 facing the collecting section 13 to reliably collect paper dust and the like. 12 is a claw fixed in the recess 11, and the rotating electrode 9
flick the tip to prevent paper dust etc. from adhering to the rotating electrode 9. Note that a DC voltage having a polarity opposite to that of the DC power supply 3 may be applied to the rotating electrode 9, and the electrode 7 may be grounded.

Furthermore, if the adhesion of paper dust or the like to paper is weak, an alternating current voltage may be applied between the electrode 7 and the rotating electrode 90, and the corona discharge device 2 may be omitted.

The present embodiment is constructed as described above, and the corona discharge device 2 applies an electric charge to the paper powder 6 etc. on the surface of the paper 1, and the charged paper powder 6 etc. is floated between the electrode 7 and the rotating electrode 9. The particles are collected in the collection section 13 by the wind force generated by the rotation of the rotating electrode 9. In addition, if air is sucked from the 11° portion of the wire mesh through a blower, collection can be carried out more efficiently.

In this way, according to this embodiment, the paper particles are charged with corona discharge, and the electrically charged paper particles are separated from the paper surface by the electric field, are made to flutter, and are collected using wind power. It is possible to efficiently remove paper dust etc. that sticks to the surface of the ink roller. This reduces the frequency of cleaning and damage to the rollers.

[Brief explanation of the drawing]

FIG. 1d is an explanatory diagram showing the overall schematic configuration of an embodiment of the present invention. 1...Paper, 2.Corona discharge device (charging mechanism), 6.Paper powder, etc., 7.Electrode, 10.Collection device Fig. 1

Claims (1)

[Claims] A device for removing paper dust, powder, etc., characterized in that a collection mechanism is provided on the surface of the paper or film along a conveyance path to separate it from the paper surface and convey and collect it using wind power.