JPH01239558A - Plane type image scanner for reading stripped plate - Google Patents

Abstract

PURPOSE:To read an original in a large size without distortion by making the rear end of an original platen round and providing a gap part, housing the original, which is provided continuously from the rear end. CONSTITUTION:When the original is larger than the upper surface of a housing 1, the original sticking out in the direction of the supporting arm 6 of a light source 7 from the upper surface thereof can be housed in the gap part 5. In such a case, the original is not damaged because the rear end of the original platen 2 is formed round 2-a. Therefore, the original can be freely positioned anywhere on the upper surface of the housing 1 without being interrupted by the supporting arm 6 on the light source 7, so that the optional part of the original in the large size for stripped plates can be arranged on a window 4 for reading. Thus, the optional part of the original in the large size can be read out.

Description

[Detailed Description of the Invention] <Industrial Application Field> The second invention relates to a flat image scanner for reading collections for printing. The present invention relates to a flat image scanner for a collection that can be read.

In other words, in order to streamline printing retouching, the same applicant is currently developing an electrical cutting device (image input from a separated plate using a flat type scanner, scanner, etc., which is displayed on a TV as a color image, color difference and brightness). Image input for a cutting device (Japanese Unexamined Patent Publication No. 62-234154) that extracts the cutout lines of a painting (mask lines) using differences, etc., and cuts along the lines from which a peel-off film is obtained using a plotter. The present invention relates to a flat image scanner useful as a device for reading a collection.

<Conventional Technology> Conventionally, in retouching for printing, masks have been made by manually cutting peel-off films. However, since such manual work requires labor, an electric cutting device as described above was developed. However, when using a general TV camera to input this image, it was found that distortion occurred and accurate images could not be input.We tried using various other commercially available image input devices, but had drawbacks such as difficulty in inputting data, and none were satisfactory.

<Problem to be solved by the invention> In general, in printing, images such as photographs, paintings, etc.1'! Color separation and shading are performed to create a color separation negative film. Line drawings such as illustrations, graphs, and tables, as well as characters and logo marks, etc., are mainly photographed with a camera, and negative film is made. Negative films made from such various manuscripts are pasted in units of 4 to 8 pages at predetermined positions on a sheet of Mylar film to create a collection. That is, large-sized printed matter such as bosk is collected one by one, and A4 size printed matter is collected in units of 4 to 8 pages.

However, the size of the document table of the -S flat image scanner was at most A3 size.

For this reason, it is not possible to read all the image information of a large manuscript such as a collection at the same time, so it is necessary to change the position of the manuscript on the manuscript table.
Must be partially read.

However, with conventional flat image scanners,
The attachment of the cover of the document holder and the attachment of the light source were obstructive, and it was sometimes impossible to position the central part of the collection within the reading range on the document table.

Therefore, according to the present invention, any part of a manuscript of any large size can be positioned within the reading range on the manuscript table, and even large-size image information such as a collection can be read. The purpose of the present invention is to provide a flat image scanner for inputting a collection, which can reduce the amount of noise.

Means for Solving the Problems> A flat image scanner according to the present invention includes a housing incorporating a photoelectric conversion means made of a CCD, and a transparent housing provided on the upper surface of the housing, at least at a portion corresponding to the photoelectric conversion means. A manuscript table serving as a reading window,
The reading window is located far behind the document table, and includes a light source supported movably up and down at a position corresponding to the photoelectric conversion means on the upper part of the housing, an arm supporting the light source, and the housing. This is a flat image scanner for reading a collection of books, and includes a gap portion provided in the housing on the inner side of a connection point with the housing for accommodating a document.

According to the flat image scanner according to the present invention, when the original is larger than the top surface of the housing, the part of the original that is not currently being scanned can be stored in the gap, making it possible to store large-sized originals such as collections. Images can also be read.

<Embodiment> An embodiment of a flat image scanner for reading a collection according to the present invention will be described below with reference to the drawings.

FIG. 1 is a slanted view showing the configuration of one embodiment.

A rectangular parallelepiped housing 1 has an original table 2 made of a magnetic sheet on its upper surface. The magnet sheet is magnetic, and this is because it attracts and fixes the register bin 3 in any position to align the position of the collection of manuscripts across the four editions of yellow, magenta, cyan, and black. .

The size of the surface of the housing, in other words, the size of the document table 2, is 920 mm long and 1000 mm wide.

A transparent member such as glass is fitted into a part of the document table 2 to form a reading window 4. The size of the reading window 4 is 155 mm in length and 130 mm in width.

The position of the reading window 4 is in the center in the horizontal direction, and quite far back in the vertical direction (the center of the reading window 4 is 3201P from the rear).
l). A line sensor made of COD is provided below the reading window 4, and by moving the reading window 4 in a direction perpendicular to the array direction, the line sensor reads the document 8 placed above the reading window 4 two-dimensionally. Scan. The line sensor consists of 2048 elements.

Continuing from the rear end of the document table 2 to the rear side of the housing 1,
A gap 5 is provided which is open on both sides and has a substantially U-shaped cross section. The interval between the gap portions 5 is 80 mm. An arm 6 is provided outside the gap 5 , and a light source 7 is attached to a vertically movable portion 6 - a at the tip of the arm 6 .
is supported so that it can move up and down. At the time of reading, by lowering the movable part 6-a of the arm as shown in FIG.
The light source 7 presses the original 8 against the reading window 4. The light source 7 consists of a parallel linear fluorescent lamp facing the line sensor. As the line sensor moves, the fluorescent light also moves.

Although not shown, the output of the line sensor is output as image information and supplied to the above-mentioned cutting device or the like.

According to such a flat image scanner for collection,
When the original is larger than the upper surface of the housing, the original protruding from the upper surface in the direction of the support arm 6 of the light tA7 can be stored in the gap 5. At this time, since the rear end of the document table 2 is rounded 2-a, the document is not scratched.

This allows the document to be freely positioned anywhere on the top surface of the housing without being obstructed by the support arm of the light source. Therefore, any part of a large-sized original for collection can be placed on the reading window 4, and therefore any part of the original can be read. In this embodiment, any part of a collected manuscript up to the finished size of B2 can be read.

Note that the present invention is not limited to the embodiments described above, and various modifications are possible. For example, instead of being attached to the outside of the housing 1, the gap portion 5 may be formed by cutting out the housing itself in the height direction along one side. Moreover, the dimensions of each part mentioned above are an example for explanation, and are not taken as these.

<Effects of the Invention> As explained above, according to the present invention, it is possible to position any part of an arbitrary large-sized document within the reading range on the document table, and it is possible to place a large-sized image such as a collection. Provided is a flat image scanner for a collection that can also read information and can also read information without causing distortion using a CCD.

The manuscript table is composed of a magnetic sheet that can attract register pins, so the register pin 3 can be attracted and fixed at any position to align the position of the collection of manuscripts across the four versions of yellow, magenta, cyan, and black. can do.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of a flat image scanner according to the present invention, and FIG. 2 is a perspective view of the same in a reading state. . 1...Housing 2...Document table 3...Register pin 4...Reading window 5...Gap part
8... Manuscript submitted by Toppan Printing Co., Ltd. Representative Kazuo Suzuki Figure 1

Claims (1)

[Claims] 1) A housing with a built-in photoelectric conversion means consisting of a CCD, a document table consisting of a magnet sheet provided on the upper surface of the housing and capable of attracting register pins, and at least a portion of the document table corresponding to the photoelectric conversion means. It is a transparent reading window, and the position of this reading window is located far behind the document table, and the rear end of the document table is rounded, and there is a gap provided continuously from the rear end for storing the document. A flat image scanner for reading a collection of books, comprising a light source provided at a position corresponding to the photoelectric conversion means on the upper part of the housing, an arm that supports the light source in a vertically movable manner, and the like.