JPH0464472A - Eraser - Google Patents

Abstract

PURPOSE:To conduct the removal cleaning of a toner image or the like on erasable paper in a simple manner by a method wherein an eraser consists of a heating roller, a cooling roller, a pressing roller for pressing up the erasable paper against a hot melt resin, and a drive part for these rollers. CONSTITUTION:A cleaning sheet 104 consists of an endless sheet 108 provided with a hot melt resin 107. The hot melt resin 7 is heated on the peripheral surface of a heating roller 106 to be melted or softened. Printed erasable paper 101 is inserted from rightward and pressed up against the hot melt resin 107 by a pressing roller 103. In this stage, a toner 102 on the erasable paper 101 adheres to the hot melt resin 107 on the cleaning sheet 104. The cleaning sheet 104 is fed toward a cooling roller 105 in this state and cooled, whereby the hot melt resin 107 is increased in internal cohesion and set. At the cooling roller 105, the hot melt resin 107 is separated from the erasable paper 101. At this time, the toner 102 on the erasable paper 101 is released therefrom, and the paper is fed out in unprinted states.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an eraser that can be used to clean paper that has been used once.

BACKGROUND OF THE INVENTION With the recent shift to office automation, printer paper and copy paper have come to be used in large quantities. This has even led to the problem of deterioration of the global environment due to deforestation. Conventionally, the only way to solve this problem was to remove the ink, etc. from used paper, crush it, and throw it out again to recycle it into paper called waste paper. However, recently, a cleaning method has been developed that easily removes the character images on used paper. For details, please refer to the patent application 1986-1.
No. 28946. According to this invention, paper (erasable paper) whose surface has been subjected to mold release treatment is used, printing, etc. is performed on this paper, and then, for cleaning, a molten thermofusible material (cleaning material) is applied over the printing. ), cool it, and remove the prints, such as text and images, along with the heat-fusible material.

This method is very effective; paper that has been subjected to release treatment can be used hundreds of times, and by making the printing ink thermofusible and made of the same material as the cleaning material, the cleaning material can also be used hundreds of times. . Therefore, it is very economical and of course does not destroy forests.

Problems to be Solved by the Invention However, the reality is that there is still no apparatus for cleaning the erasable paper, and the method described above cannot be used effectively.

Means for Solving the Problems In order to achieve the above problems, the eraser of the present invention includes at least an endless sheet having a hot-melt resin on the surface, a heating roller and a cooling roller for supporting and rotating the endless sheet, and an eraser paper. It consists of a pressure roller that presses the thermoplastic resin against the softened or melted thermoplastic resin, and a drive unit that moves these rollers in conjunction with each other, making it possible to easily remove toner images and the like on the erasable paper.

Function: If you use the eraser of the present invention, you will not have to throw away used paper (because it can be used repeatedly, paper consumption will be extremely reduced.In the office, even if you print out or copy many times, It is economical and there is no need to worry about forest resources.

Furthermore, newspaper faxing becomes possible at home.

EXAMPLE Hereinafter, the eraser of the present invention will be explained with reference to the drawings.

FIG. 1 shows a schematic diagram of an embodiment of the eraser of the present invention.

The cleaning sheet 104 is composed of an endless sheet 108 holding a hot-melt resin 107.

There is a heat roller 106 and a cooling port 105, and the heat roller 1
On the circumference of 06, the thermofusible resin is heated and melted or softened. Printed erasable paper 101
is inserted from the right side and pressed against the hot melt resin by a pressing roller 103.

At this stage, the toner 102 on the eraser vapor sticks to the hot melt resin on the cleaning sheet, and in this state is sent to the cooling roller 105 where it is cooled and the internal cohesive force of the hot melt resin increases and becomes hard. Cooling is also performed during transportation. The hot-melt resin and the erasable paper are peeled off at the cooling roller, and at this time, the toner on the eraser paper is peeled off and leaves as a blank sheet. Although this cleaning process is not shown, it is performed by a drive unit that can move each part in conjunction with each other.

The thermofusible resin is preferably the same resin as the toner.

As you clean many sheets, toner will accumulate, but the toner becomes a hot-melt resin for cleaning and can be used repeatedly. If too much is accumulated, it is possible to scrape it off with a blade or the like. Therefore, as long as the endless belt 108 can withstand it, cleaning is possible.

If the paper to be inserted is plain paper that is not erasable paper, the cleaning principle will work, but the paper will stick to the hot-melt resin and lose its ability as a cleaning sheet. In order to avoid this, it is possible to distinguish between erasable paper and other paper (plain paper), and to bypass the paper in the case of plain paper. Detection can be easily performed, for example, by placing a mark on erasable paper.

Examples of erasable paper and eraser are given below.

Example I A silicone sealant (TSE 397 manufactured by Toshiba Silicone) was applied thinly onto A4-sized coated paper and dried to produce erasable paper. When this erasable paper was printed using a copying machine (Canon F (-511)), an image that was almost the same as a copy made on plain paper was obtained.A polyimide film was made into an endless belt shape and heated at 150°C. Place a laminating film bank (TOLAMI-F ILM (A) manufactured by Tokyo Laminex Co., Ltd.) between the heating roller and the cooling roller at room temperature.
) was attached with the hot-melt resin coated side facing outward.

An eraser as shown in Figure 2 was made using a silicone rubber roller as a pressure roller. The running speed of the cleaning sheet (endless belt and laminated film pack) is approximately 2
It was set to C1/sec.

When the printed eraser paper is inserted into the eraser so that the image side is in direct contact with the hot melt resin, the eraser paper and cleaning sheet stick together and are conveyed together to the cooling roller, where the eraser paper is removed. It was elastic and peeled off naturally from the cleaning sheet.

The image toner was removed from the surface of the erasable paper and could be cleaned.

The erasable paper with the toner image removed was inserted into the copier again and a new copy was made. This cycle was repeated many times.

When peeling off the erasable paper from the cleaning sheet, the toner image could be removed better if the traceable paver was lifted and peeled off.

It goes without saying that the eraser can be bent to peel off the eraser paper.

Example 2 Erasable paper was made by pasting mending tape (8110, manufactured by Sumitomo 3M Ltd.) on plain paper (copy paper). Example 1 on this erasable paper
An image was formed by copying in the same manner as above. The same eraser as in Example 1 was used. As a result, the toner image was cleanly removed.

Example 3 Mending tape (manufactured by Sumitomo 3M Ltd. 81)
The release paper of 10) was cut into A4 size to make erasable paper, and printed on the release layer side using a laser printer (p Hasonic page printer B4 manufactured by Matsushita Electric Industrial Co., Ltd.). The toner had good adhesion and did not come off even by rubbing it with my fingers. This was subjected to the same eraser as in Example 1. The toner image peeled off cleanly and returned to its original state before printing. This erasable paper can be used over and over again.

Effects of the Invention By using the present invention, paper printed by electrophotography (erasable paper) can be cleaned with a simple machine, so it is not only very economical to use, but also does not waste forest resources. .

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an embodiment of the eraser of the present invention. 101... Erasable paper, 102...
...Toner image, 103...Press roller, 1
Cleaning sheet for 04, 105...
Cooling roller, 106... Heat roller, 107...
...Thermofusible resin, 108... Endless sheet. Name of agent: Patent attorney Shigetaka Awano 1 person 101-11-1-1-1-1-1-1-1-1-2

Claims (2)

[Claims] (1) At least an endless sheet having a thermofusible resin on its surface; a heating roller and a cooling roller that support and rotate the endless sheet; and a pressing roller that presses the eraser paper against the softened or melted thermofusible resin;
An eraser characterized by consisting of a drive unit that can move these parts in conjunction with each other. (2) The eraser according to claim (1), wherein erasable paper and plain paper are distinguished, and plain paper bypasses the degree of erasure described in claim (1).