JPH054364Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field of the invention] The invention is a board recording device that can individually copy both information written on a board and a manuscript for copying placed on a manuscript stand etc. It is related to.

[Prior art]

Conventionally, in devices that make it possible to copy information written on a board, the board reading method generally uses a flat scanning method using a CCD sensor as a solid-state imaging element, and the recording method generally uses a thermal recording method. This type of digital method not only cannot copy the calligraphic information on the board onto plain paper, but also has a slow recording speed, so it takes time to copy many sheets, and the resulting recording density is about 6 dots/mm. .

Therefore, a method of recording information written on a board using an electrophotographic method has recently been proposed. This type of method includes a method in which information written on a board is directly imaged on a belt or drum-shaped photoreceptor of a conventional electrophotographic copying machine, and is copied onto a plain paper transfer material using a known electrophotographic process. The information written on the board is imaged once on a field lens installed on a manuscript table, and the image is formed on a photoreceptor through an optical system in an electrophotographic copying machine, and then transferred to a transfer material using a known process. There are ways to make copies.

Both methods can copy the original placed on the manuscript table and the information written on the board onto plain paper, and have improved recording density compared to conventional digital methods. When obtaining a single copy, after copying a board document once, if the transfer material obtained by the copying is used as a copy original to make a second copy, there is no wastage of time due to the copying speed.

In addition, recently, rather than images written on a board, pre-written paper images, such as newspapers or posters, are inserted into transparent sheets placed over the board and fixed to the board. It is also being used to record these images.

Specific examples of problems that occur in the above usage will be described below with reference to the drawings.

FIG. 2 is an example of a schematic diagram of the optical system of a copying machine capable of copying from the above-mentioned board. 1 is a lamp that illuminates the board, 2 is a board image reading unit, 3 and 4 are mirrors, and 5 is a conventional PPC that reads the board image read by 2.
This is a lens that forms an image on the document table 6 of the copying machine section,
It constitutes a first imaging optical system. Rollers 12 and 13 are rotated by a pulse motor (not shown). Since the sheet 2' is stretched by this roller, the sheet moves when the roller rotates. The sheet-like original 11 is sandwiched between the transparent sheets described above. Figure 3 is an enlarged view of the PPC part. In the figure, 7 shows the image of the original 6' on the photoreceptor 21.
A lens that forms an image on the image forming part of the second imaging optical system. Reference numeral 10 denotes a lamp that illuminates the original 6 on the PPC unit original table 6'.

When copying a normal original 6, use the original presser 32.
An original is inserted between the original plate 6' and the original table 6', and while the original is scanned in the direction of arrow 30 and the photoreceptor 21 is also rotated in the direction of arrow 31, it is copied onto a transfer material by a known electrophotographic process. At this time, if the developing toner adheres to the leading edge of the transfer material, the conveying means may be soiled, or the toner may adhere to the fixing roller, making it difficult to separate the transfer material from the roller, resulting in a paper jam. In particular, in a heat roller type fixing device that fixes the transfer material while conveying it under pressure with a heat roller, the toner at the tip of the transfer material melts or softens when it touches the heat roller and becomes sticky, causing the transfer material and the heat roller to adhere. This can lead to poor separation. This tendency becomes even stronger when thin paper is used as the transfer material.

In order to prevent such accidents, traditionally,
Even if the image is printed all the way to the edge of the original, in order to prevent toner from reaching the narrow area (approximately 0.5 to 2.0 mm) at the leading edge of the transfer material, uniform light is applied to the corresponding area on the photoreceptor. exposure (hereinafter referred to as "tip margin exposure"). Then, the original image is exposed except for the portion of the original image that corresponds to the range that has been exposed to the leading edge margin.

FIG. 3 shows an embodiment of a conventionally known apparatus for exposing blank spaces. This device illuminates a document 6 on a document table glass 6' with a document illumination lamp 10, and forms an image of anti-oblique light A from the document on a photoreceptor 21 with a lens 7. Further, a white portion 19 is formed under the tip of the document table glass 6' by white paint or white tape. The original 6 and the original platen glass 6' move in the direction of arrow 30 and are sequentially exposed from the scanning end S. Then, the light reflected from the white area becomes the margin exposure. However, if you want to copy a board document, this white member at the bottom of the original surface is useless.

When copying a document on a board, an image light beam is emitted from the lens 5 of the board writing section, but the original pressure plate 32 is scanned in the direction of the arrow 30, and as shown in FIG. luminous flux
The light is made incident on the lens 7 on the PPC copying machine side. Therefore, if there is an image from the leading edge of the image on the paperboard, the white leading edge image described above will not be formed, and the leading edge of the copy will be wrapped around the roller by toner printing, making copying impossible.

[Problem that the invention attempts to solve]

Therefore, the present invention was devised to solve the above-mentioned problems of the conventional method.The purpose of this invention is to be able to accurately form a margin of a predetermined width at the leading edge of transfer paper, and to save space. An object of the present invention is to provide an image forming apparatus that is capable of providing an image forming apparatus.

[Means to solve the problem]

To achieve the above object, the present invention is such that when copying a board, an image of the board illuminated by an illumination means is projected onto an electrophotographic photoreceptor by a first imaging optical system and a second imaging optical system. On the other hand, when copying a copy original, the original placed on the original table is illuminated by another optical means, and this image is projected onto the electrophotographic photoreceptor in the form of a slit by the second imaging optical system. It has an optical system that projects images onto the board, and develops the board image and original image projected onto these photoreceptors with toner, and transfers this toner image to transfer paper, thereby combining the image information written on the board with the original for copying. Each of these is a copyable board recording device, and a white band-shaped member made of an oil-repellent material is provided at the tip of the image area of the board,
A white image is formed at the leading edge of the copy image on the transfer paper corresponding to the image on the board.

〔Example〕

FIG. 1 is a schematic diagram showing an embodiment of a recording apparatus according to the present invention. Note that the same numbers as in FIGS. 2 and 3 are the same members.

A white member 14 is placed at a position corresponding to the leading end of the board, that is, the part that is first read. The width H of the white member 14 may be set to a value larger than H=2/(magnification of the lens 5), assuming that the required width on the transfer material is 2 mm. When copying a document on a board, first, as explained in FIG. 5, the document table of the PPC copying machine section scans to a position where there is no document holding plate.
At the same time, the board illumination lamp lights up.

Next, at the same time as the photoreceptor 21 begins to rotate, the sheet 2' is scanned by rotating the rolls 12 and 13 by a pulse motor (not shown). Then, when the white member is about to pass the position of the board image reading section 2, that is, the number of input pulses to the pulse motor is counted, and it is aligned with the leading edge position of the paper 25 fed to the PPC copying machine section, and the copy is made. I do. As the white image formation progresses at the leading edge of the image, the images on the sheet are transferred one after another to the lenses 5 and 7.
The image is formed on a photoreceptor through an electrophotographic process (not shown) and copied by an electrophotographic process (not shown). This white member is arranged not only at the leading edge of the board manuscript on the surface but also at the leading edge 15 of the surface.

The surface of this white board is made of Teflon resin, which is an oil-repellent material. This material has a characteristic that the surface is hard to stain, and even if you write with Magic (product name), etc., it will repel ink and will not turn into an image.

[Effect] Therefore, this white board can always form a white and stable leading edge white image.

[Brief explanation of the drawing]

Figures 1 and 2 are schematic diagrams of a board recording device capable of copying both board writing and ordinary paper manuscripts;
3 and 4 show partially enlarged sectional views of the exposure section. 1 is a lamp for illuminating the board, 2 is an image reading unit, 3 and 4 are mirrors, and 5 is a board for displaying the board image on the manuscript table 6.
7 is a lens that forms an image on the document table onto the photoreceptor 21; 10 is a lamp that illuminates the document on the document table 6; 11 is a board image;
Reference numerals 2 and 13 denote rollers that stretch the board sheet roll 8, and by rotating one of these rollers clockwise, the sheet roll is scanned in the direction of the arrow 16. 25
The toner image on the photoreceptor is transferred to plain paper by a transfer unit (not shown), and the image is recorded by moving in the direction of arrow 17. In the figure, 1... board lighting lamp, 2...
Board reading section, 3, 4... Optical path bending mirror, 5... Field lens, 6... Original table glass, 7... Imaging lens, 16... Sheet moving direction, 18... Photoconductor rotating direction. .

Claims (1)

[Claims for Utility Model Registration] When copying a board, an image of the board illuminated by an illumination means is projected onto an electrophotographic photoreceptor in a slit shape by a first imaging optical system and a second imaging optical system. On the other hand, when copying a copy document, the document placed on the document table is illuminated by another optical means, and this image is formed into a slit shape on the electrophotographic photoreceptor by the second imaging optical system. It has an optical system for projection, and develops the board image or original image projected onto these photoreceptors with toner, and transfers this toner image to transfer paper, so that both the image information written on the board and the original for copying can be transferred. In a board recording device capable of copying, a white band-like member made of an oil-repellent material is provided at the leading edge of the image area of the board, and a white band-like member made of an oil-repellent material is provided at the leading edge of the copied image on the transfer paper corresponding to the image on the board. A board recording device that forms a white image.