JPS62151835A - Copying machine - Google Patents

Abstract

PURPOSE:To obtain a copy having high quality invariably with ease by providing an original back surface which has light reflective sheets laminated and is renewed by peeling a dirty sheet. CONSTITUTION:When an image is affected by dirt on the original back sheet 3a during copying operation, the dirty original back sheet 3a is peeled off to expose a new original back sheet 3b which is not dirty. Thus, an image of high quality is obtained by using this new original back sheet without being affected by dirt on the original back surface. Thus, sheets are peeled off one after another according to dirt and when laminated sheets 4 are used, new laminate sheets 4 are mounted, thereby taking copies continuously.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a copying apparatus that provides high-quality images without causing stains on a document platen cover to be copied onto the copied images.

In a conventional copying apparatus, an electrostatic latent image is first formed on the photoreceptor by irradiating light onto the original image on the original platen and guiding the reflected light onto the photoreceptor, and then using toner to form an electrostatic latent image on the photoreceptor. The developed image is developed, transferred to copy paper, and further fixed to obtain a copy. In such a copying device, the light-reflecting surface (IFFI normal/white) of the document platen cover, that is, the back surface of the document, becomes dirty with dust and hand marks as the number of copies is repeated, causing the document to become smaller than the copy size. When copying an original, dirt on the back of the original is copied onto the periphery of the copy paper.

Furthermore, when semitransparent paper such as tracing paper is used, the image of dirt on the back of the document is transmitted through the document and is copied, reducing the image quality of the copy.

In the past, to deal with this problem, it was necessary to periodically clean the back of the document using a cloth with a neutral detergent during daily inspections, and the instruction manual for this cleaning method, however, was not recommended. It takes a lot of time and effort to prepare cloth, etc., time to clean, and trouble to clean up after cleaning, and it is not always possible to pick, scoop, and clean up according to the instructions, and the back of the document is used with dirt. is the current situation. Of course, every effort has been made to select a white, light-reflecting material that is resistant to stains due to hand marks, etc., but the current situation is that there is no satisfactory material. In view of the above-mentioned problems, the present invention provides a copying apparatus that includes a light-reflective sheet on the document cover and a back surface of the document that can be easily maintained.

Means for Solving the Problems In order to solve the above-mentioned problems, the copying apparatus of the present invention includes a document cover that is used as a back surface of the document, which is used in the image collection step of irradiating the document with light to collect the document image. Sheets having a light reflecting property of 1 are laminated, and the sheets are peeled off and removed as the amount of light is accumulated, thereby providing a renewable back surface of the document.

Furthermore, an adhesive layer is held on the back side of the light-reflective sheet, and the document cover is provided so that the sheet can be easily removed after adhesive lamination without damaging the surface of the opposing sheet. It is.

According to the present invention, with the above-described configuration, the original back sheet surface with no '/Q deviation can be updated to a new original back sheet surface with no '/Q deviation by an extremely simple operation of peeling off the original back sheet on which dirt has accumulated on the original cover of the copying device. As a result, it is possible to obtain the effect that dirt is not copied to the non-image area, which is the same as when replacing the original document cover itself with a new one.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view of the copying apparatus of the present invention.

In FIG. 1, 1 is a document loading glass, 2 is a document, 4 is a laminated sheet, 5 is a sponge, and 6 is an outer frame of a document cover.

A light-reflective surface can be firmly fixed to the side that contacts the document stacking glass 1 or document 2 inside the document cover, and the light-reflective surface can be firmly fixed to the back surface, and can be easily peeled off by hand. A laminated sheet 4 made of a plurality of laminated sheets having the function of a sheet for the back of a document holding an adhesive layer is attached.

A sponge 5 is placed between the laminated sheet 4 and the outer frame 6 of the document cover.
The structure is such that light leakage is suppressed as much as possible during copying, so that it can be used to copy tall documents and other documents.

The operation of a portion of the document table cover of the copying apparatus constructed as described above will be described below with reference to FIGS. 1 and 2.

First, FIG. 2 is an external view of the document table cover of the copying apparatus. When the original back sheet 3a becomes dirty and affects the image during a copying operation, the dirty original back sheet 3a is peeled off and removed to expose a new, clean original back sheet 3b.

With the new original back sheet 3b without any leakage, it is possible to always obtain high-quality images without being affected by dirt and grime on the back of the original table. Once the laminated sheet 4 is used up by peeling and removing the sheets one by one depending on the dirt, you can easily replace the laminated sheet 4 with a new one.
It is possible to install.

In the above embodiment, the document back sheet 4 is made of vinyl-coated white paper with a reflection density of 0.06, which has adhesive properties on one side and can be laminated.

In the above embodiment, a copying machine is described in which the original is loaded on the original loading glass and light is reflected from below to collect the original image. This includes the format of

Effects of the Invention As is clear from the above explanation, the present invention requires extremely simple maintenance work such as simply peeling off a dirty sheet without spending much time or effort on cleaning. This has the effect of producing copies of the same high quality as when the back side of the original is replaced. Furthermore, sheet cents (
There is no need to replace the entire document cover just by replacing the laminated sheet (laminated sheet), and this cover can be used semi-permanently.

[Brief explanation of drawings]

3a, 3b... Manuscript back sheet, 4...
・Laminated sheet, 5...Sponge, 6...
- Outer frame of the document cover. Name of agent: Patent attorney Toshio Nakao (1 person) Figure 2

Claims (2)

[Claims] (1) In the image collection process in which a document image is collected by irradiating light onto the document on the document table, light-reflective sheets are laminated to provide a back surface of the document that can be updated by peeling off and removing soiled sheets. Copying equipment. (2) A patent claim characterized in that an adhesive layer is held on the back side of the light-reflecting sheet, and after the sheets are adhesively laminated, it can be easily peeled off without damaging the surface of the opposing sheet. A copying apparatus according to scope 1.