JPS62150361A - Both-sides copying machine - Google Patents

Abstract

PURPOSE:To obtain a both-sides copy image whose top and reverse sides are in the same top-bottom relation by turning images of an original by 180 deg. for every frame and thus forming the both-sides copy image. CONSTITUTION:When a prism 38 is rotated around an optical axis (e), its projection image rotates by an angle twice the angle of rotation of the prism. Therefore, when the prism 38 is rotated around the optical (e) by 90 deg., the projection image changes in direction by 180 deg. and is projected. Namely, the prism 38 is rotated by 90 deg. to turns the image (B) on a film by 180 deg. and project it on a screen 11, so that the image is formed on a photosensitive drum 15. Thus, a both-sides copy having 'A' and 'B' in the same direction is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Object of the Invention [Field of Industrial Application] The present invention relates to a double-sided copying apparatus capable of forming images on both sides of a copying material.

[Conventional technology]

Conventionally, an image recorded on a document such as a film is projected onto a screen and read, and the image is formed on a photoreceptor and transferred to both sides of a copying material.

[Problem that the invention seeks to solve]

In this case, if the upper and lower directions of the original image are photographed parallel to each other on each film as shown in Figure 1 (a), the double-sided copy image will be as shown in Figure 1 (b), similar to the oblique view in Figure 1 (C). It can be bound to.

However, as shown in Figure 2 (a), if the original image is photographed in series on each film with the top and bottom of the original image on the same line in the longitudinal direction of the film, the double-sided copy image will have the "A" side of the copy material Because it is turned 180 degrees, it becomes the same figure (b), and the same figure (C
), each page of the copied image is upside down, making it extremely difficult to read and inconvenient.

An object of the present invention is to provide a double-sided copying apparatus that can produce double-sided copied images in which the front and back sides match in the top and bottom directions even in the case of FIG. 2 above.

Summary: Structure of the Invention [Means for Solving Problems] The present invention provides a method for forming an image of a document on a photoreceptor in a double-sided copying device that transfers an image on a photoreceptor to both sides of a copying material. , a double-sided copying apparatus characterized by comprising a means for rotating an image by 1800 degrees for each frame of a document to equalize the vertical direction of the image on the front and back sides of a double-sided image.

[For production]

Even in the case of film originals in which the upper and lower directions of the original images are photographed in series on the same line as shown in Figure 2 (a) above, for example, the upper and lower directions of "A" can be adjusted for each film frame as shown in Figure 2 (e). By rotating the image 1000 times, a double-sided copy can be obtained in which the top and bottom images of the front and back sides of the same figure (f) are aligned in the same direction.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 3 shows a schematic configuration of an example of a league printer to which the present invention is applied. A microfilm F is illuminated by an illumination means consisting of a light source 16 consisting of a lamp and a spherical mirror, and a condenser lens 17, and the illuminated image is The lens 1 is projected onto the screen ll by a league optical system a consisting of a projection lens 18 and mirrors 19, 20, and 9-10.
The image is projected at a predetermined magnification of 8. In this case, the printer screen mirrors 12 and 13 are moved in the direction of arrow W to a position where they do not block the projection optical path a to the screen.

When copying an image on a microfilm, the mirror 12 is inserted on the optical path between the mirror 20 and the mirror 9 as shown in the figure, and the mirror 12 and the mirror 13 are integrated and the photosensitive drum 15 is adjusted at the circumferential speed as shown by the arrow W. direction, scans the image light of the microfilm on mirror 20, and
2 and 13, passes through the slit 14, and is projected onto the exposure position of the photosensitive drum 15.

A charging device, a developing device, a transfer device, and a cleaning device are arranged around the photosensitive drum 15, and copies can be obtained by a known process.

FIG. 4 shows a copying material conveyance system.

Copy material 21 is placed in a storage cassette 22. When a copy signal is input here, the copy material 21 is sent out by the pull-out mechanism 23 in synchronization with the image on the photosensitive drum 15, is sent to the transfer section of the photosensitive drum 15 through the conveyance roller 24, and is transferred to the transfer section of the photosensitive drum 15 by the transfer corona 25. The toner image on 15 is transferred to copy material 21. Thereafter, the copy material passes through the conveyor belt 2611 and the fixing device 27 and is discharged.

28 in the figure is a passage switching member, and when it is in the position of the solid line,
Copy material 21 passes under member 28 to storage cassette 29;
Further, when the copy material 21 is at the position indicated by the dotted line 28', the copy material 21 is sent to the paper discharge tray 33.

The copy material 21 sent to the cassette 29 is placed in the cassette with the transferred image side facing up, and then transferred to the rollers 30, 31, . . .
313 to the pull-out mechanism 23 and again to the transfer section of the photosensitive drum, thereby making it possible to transfer images onto both sides of the copy material 21.

In this process, as mentioned above, the image of “A” is shown in Figure 2.
Turn up and down as shown in (b).

The above-mentioned pull-out mechanism 23 consists of a plurality of small rollers 23a that freely rotate on the same axis, and these small rollers 23a
is normally located on top of the uppermost copy material 21 stored in the storage cassette 22. spring 35
is pushing the stacked copying material toward the small roller 23a. When it is desired to pull out one sheet of copying material from the cassette 22, the roller 23a rotates in the same counterclockwise rotation direction in response to a signal. This roller has a portion 23b around it that has a larger diameter and a rougher surface, so that when the portion 23b captures the uppermost copy material, it pushes it forward.

It is designed to be delivered to a conveyance roller 24.

When one copy material is discharged from the storage case 29, the copy material is conveyed to a position where its leading edge contacts the small roller 23a, and is stopped at that position. When the large-diameter rough surface portion 23b of the roller captures this copy material 21 (instead of pulling out the uppermost copy material from the storage cassette 22), this single-sided transfer material that has passed over the guide 36 is The finished copy material is transported.

The present invention is to rotate the image on the microfilm F by 180° (invert it vertically) frame by frame as described above in a double-sided copying apparatus as illustrated in FIGS. 3 and 4 above.

FIG. 5 illustrates one such means, in which a prism holder 39 holding a trapezoidal prism 38 for image rotation is rotatably connected to a holder 37 of the projection lens 18. 4
0 is a motor that rotates the prism holder, and 41Φ42 is a transmission gear.

When the prism 38 is rotated about the optical axis e in the above configuration, the projected image is rotated by an angle twice as large as the rotation angle of the prism. Therefore, the prism 38 is rotated 3 times around the optical axis e.
When rotated by 0°, the projected image is projected with its orientation changed by 180°.

That is, by rotating the prism 38 by 90 degrees, for example, the image of "A" on film F in FIG. 2 is changed to the image shown in FIG.
1 and a photosensitive drum 15. ): can be imaged to. Therefore, "a" and "i" are copied on both sides in the same direction as shown in (f) of the same figure.

FIG. 7 shows an example of a block diagram of sequence control when performing reverse copying as described above. First, the copy mode selection switch 44 is used to copy the film original image frame by frame.
Select the mode for 180° rotation and double-sided copying.

Next, when the copy switch 45 is pressed, a copy image is formed on the copy material 21 as shown in FIG. The prism rotation motor 40 is controlled by the motor control circuit 46 using a signal at the time when the first frame of the copied image of "A" is formed.
rotates, and the prism holder 39- is rotated through the gear 41Φ42.
38 rotates 80 degrees around the optical axis e and stops. When the prism rotates 90 degrees, the second frame of film F becomes “A”.
is rotated 180 degrees and projected as shown in Figure 2(e).

Next, when the copy switch 45 is pressed, the copy material 21 on which the first frame copy image has been formed is sent to the photosensitive drum 15 by the rollers 30 and 31 and the pull-out mechanism 23. A copy image of "A" whose direction is changed by 180 degrees in FIG. 2(e) is formed. At this time, a copy image of the first frame "A" is formed on the back side in the direction shown by the broken line in FIG. 2(f), and the top and bottom of the image are in the same direction on the front and back sides.

The signal at the time when the copy image of the second frame "A" is obtained rotates the prism 38 by 90 degrees, the third frame "T" is projected in the original direction of the film, and the next fourth frame "Work" is directed. The prisms 38 operate alternately so as to change the direction, and a double-sided copy image with the top and bottom in the same direction is always obtained on the front and back sides.

The means for rotating the image on the film by 180 DEG as described above may be configured to rotate a known microfilm carrier that supports the film in a league printer, in addition to the use of the prism.

C1 As described in detail of the invention, by rotating the original image 180° every frame to form a double-sided copy image, it is possible to obtain a double-sided copy image with the top and bottom in the same direction on the front and back sides, and to create multiple copies of the image. the second
Even when the pages are bound as shown in Figure (g) (shaded areas), the images are aligned vertically, resulting in an easy-to-read double-sided copy.

[Brief explanation of drawings]

1 and 2 are diagrams showing the photographing mode of microfilm and its double-sided copied images, FIG. 3 is an optical path diagram of an example of a projection copying apparatus to which the present invention is applied, and FIG. 4 is a copying material of the projection copying apparatus. FIG. 5 is a detailed view of the projection lens, and FIG. 6 is a control block diagram of the present invention. F... Microfilm, 11... Screen, 1
5... Photosensitive drum, 18... Projection lens, 38...
·prism.

Claims (1)

[Claims] (1) In a double-sided copying device that transfers images on a photoreceptor to both sides of a copying material, when forming an image of an original on the photoreceptor, the image is rotated 180 degrees for each frame of the original to create a double-sided image. A double-sided copying device characterized by comprising means for making the vertical orientation of an image equal on the front and back sides.