FI80349C - FASTHAOLLNINGSANORDNING FOER ORIGINALBILDER. - Google Patents

Description

80349

Original retention device

The invention relates to an original image retention and positioning device for reprocameras, in particular for large color images and maps, comprising opposed frames mounted on frames, one of which is a glass plate for displaying the image towards the lens, and comprising a body part on which the frames can rotate substantially. around its common center of gravity from a vertical position to a horizontal position, which correspond to the shooting position and the positioning position.

The most common vertical holding device is the so-called elevator foil mounting tray, Here the original image is first placed on the back plate slightly below the foil roll, which is axially loaded into the elevator device. The foil roll in the elevator is then pulled over the image, whereby the original image is covered under the foil unwound from the roll. The foil is made to press the original image against the backing plate by sucking the air between the foil and the backing plate using a system built into the hardware.

To allow X-ray, the back plate is made of glass. Positioning an image assembled from multiple overlapping originals, the element image, on the backplane is particularly cumbersome because the alignment does not want to be maintained. It is difficult to attach even large one-piece images. Static electricity charged to the foil also makes positioning work more difficult. The use of elevator equipment sometimes damages weak originals.

A big problem is with scratching the foil even in normal use. Scratches on the foil during scanning will appear in the copy in addition to the scratches on the original image. In particular, retouching color copies, removing scratches is almost impossible, and it is common for the foil to need to be replaced once a month, which causes a significant increase in operating costs.

The closest to the invention in terms of mechanical solution are the patent publications. The rotary-frame original holding devices disclosed in SE 329084 and US 3627415. However, neither of these is suitable for capturing translucent originals. In the device disclosed in U.S. Pat. No. 3,627,415, the original images are placed on a resiliently attached pad that holds the images against the opposing glass with the frames in a vertical plane. In both devices, the initial 2 80349 successive images are set against the glass plate. Enabling X-rays in the devices disclosed in these publications is not only possible by replacing the glass plate with another plate, as the original images would not remain precisely aligned when the frame is in a vertical position but would easily slip out of place.

The object of the present invention is to provide a fastening device of the type mentioned in the preamble of claim 1, which is easy to use, suitable for X-ray and in which the above-mentioned drawbacks have been eliminated. The characteristic features of the invention will become apparent from the appended claims.

The arrangement of levels according to the invention makes the holding device an efficient positioning table and, if necessary, a light table for accurately assembling, for example, element images. The alignment of the positioned images is maintained, while the matte film simultaneously corresponds over its entire area directly to the glass plate from its own frame.

In the holding device according to the invention, the translucent originals are illuminated through a light-scattering matte film. In this case, even small scratches in the original image and debris between the levels will not appear as with direct backlighting. A ground glass plate facing the lens is therefore advantageous in that it is not scratched during use.

The invention will now be illustrated by reference to the accompanying drawings, which show an embodiment of the invention.

·; Figure 1. Front view holding and positioning device, shooting position.

Figure 2. Holding and positioning device seen from the side, positioning position.

The holding device is movable on the wheels 8 in the frame 6 along the rails 8. The guides can also be on the ceiling, leaving the floor perfectly flat. A distance measuring device can be connected to the device, which is connected to an autorphate transfer device.

The frame 4 supporting the glass plate -2 is connected to the frame 6 by means of an axis "**: 7 and the frame 3 supporting the matte film is hinged to this frame 4. · In the shooting position, the frames 3 and. · / 4 are facing each other and in a vertical plane. next: glass plate 2, original picture, polyester foil 1, picture 1.

tl 3 80349

It should be noted in particular that the lens faces a scratch-resistant glass plate 2 and the polyester foil 1 is light-scattering and not clear according to the invention. In practice, it has been found that the matte film effectively removes scratches, debris and the edges of the original image from the copy, thereby improving the quality of the copies. For imaging, the device includes imaging lights 9, which can illuminate the original image from either the front or the back side as X-rays by turning the Luminaire Support Arm to the corresponding position.

Since it is difficult to position large images and especially element images in the vertical plane, the basic solution of the device according to the invention is horizontally pivoting frames 3,4 · The top frame is raised and the glass plate 2 supported by the frame 4 forms an efficient positioning table. By using the auxiliary lights 10, the positioning table also becomes a light table, in particular positioning and alignment of the element images, Figure 2. The original image or images are placed against the glass plate 2 and then the frame 3 is lowered, whereby the polyester foil is placed almost simultaneously over the entire image area. The fastening is ensured by sucking air out between the polyester foil 1 and the glass plate 2 by means of a vacuum pump included in the device. In this case, the original image is pressed firmly against the glass plate 2. The frames can then be rotated to the shooting position.

Mainly for map imaging, the necessary correction is implemented by rotating the image plane slightly obliquely with respect to the optical axis. The shaft housing supporting the shaft 7 in the body 6 can be moved slightly horizontally forwards and backwards by means of a precision adjustment screw. The limiting device 11 determines the vertical position of the frames 3 and 4 as a vertical plane. However, this can be adjusted horizontally with the second precision adjustment screw and the position of the frames 3> 4 can be deviated slightly from the vertical. Both precision adjustment screws can be equipped with actuators and connected to an electronic control unit to automate the adjustment.

Claims (4)

1. Retaining and stationing device for original images, especially for Large images and maps, for reprocessing devices consisting of frames (1, 2) connected to frame (1, 2), which are set against each other, one of which is a glass plate (2) 5 so that the image to be pressed against it is visible against the objective and which frames are provided with hinge (5) at an edge to be able to pivot them in relation to each other, and by a body part (6) supporting frames (3,4) and allow them to pivot, most advantageously around a common center of gravity from an upright position 10 to a horizontal position, corresponding to the shooting position and the stationing position, characterized in that the plane at the bottom is a glass disc plane (2) while the second plane (I) is a matte foil which transmits good light, e.g. a chemically matted polyester foil, and that the device includes a suction system suitable for sucking a vacuum between the planes. 2. A retaining device according to claim 1, characterized in that the retaining device is provided. . ·. with rectifiers, with which the normal plane of the image plane, which is determined by the glass plate plane (2), can be turned slightly from the optical axis, both upright and in the horizontal direction, in order to be able to correct small measurement errors, especially in maps when accurate photographs. 3. A retaining device according to claim 2, wherein on both sides of frame (4) supporting the glass plate plane (2) there are shafts (7) in the middle and on these shafts (7) the frames (3, 4) can be pivoted, characterized in that a support point, e.g. a bearing housing, in the body (6) of one of the shafts (7) can be moved in. horizontal direction with the aid of a precision adjusting screw and • that the swing limiter (II) adapted to the lower or upper edge of the frame can be adjusted with the precision screw. . 4. The tilting and stationing device according to one .3'5 of claims 1-3, characterized in that the device includes auxiliary light (10) adapted to light original images in horizontal position from below.