JPS604962A - Partial copying device of copying machine - Google Patents

Abstract

PURPOSE:To allow an operator to copy only a desired part on an original easily by arranging a light emitting body array near the surface of a photosensitive body and in front of a developing device, and selecting each light emitting body and specifying the timing of entire-surface lighting associatively with the display alteration of a copying position display means provided to an original placing plate. CONSTITUTION:The light emitting body array 2 is arranged closely to the photosensitive body 1 at right angles to its running direction. Two sliders 6 and 7 for specifying a breadthwise copy area Cx on the original 5 are fitted to one X-axial edge of original placing plate glass 4 slidably on a rail 8. Proximity sensors are provided to those sliders 6 and 7 and generate signals when a scanning optical system which moves forth and back on the reverse surface of the original placing plate glass 4 approaches. Then, a divided light emission display array 9 and a switch array 10 for turning on the array 9 selectively are arranged in parallel at one Y-directional edge corresponding to respective light emitting bodies of the light emitting body array 2. When the operator presses switches corresponding to both depth-directional ends of the copy area Cy on the original, display corresponding to the part Cy is turned on, so that the copy area is judged clearly.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for copying only a desired portion of a document in an electrophotographic copying machine.

(Prior Art) Conventionally, in electrophotographic copying machines, it has been desired to copy only a portion of a document and not reproduce other portions on the copy. Do not expose the original to light or wrap it around the bottom of the original table.
Methods have been implemented or proposed in which a sheet that can be fed out freely is provided or a document table is constructed of a liquid crystal matrix.

However, in the above-mentioned method, the overlay is not versatile at all, so it is necessary to create an overlay each time, which is cumbersome, and the latter device also has the disadvantage that it is complicated and expensive. there were.

(Object of the Invention) An object of the present invention is to eliminate the drawbacks of the conventional partial copying apparatus as described above, and to provide a simple and inexpensive partial copying apparatus that can be easily operated by an operator as required.

(Structure of the Invention) In order to achieve the above-mentioned object, in the present invention, a light emitter array is arranged near the surface of the photoreceptor and in front of the developing device,
The selection of each light emitting element and the timing regulation for lighting the entire surface are linked to changes in the display of copying position display means provided at two orthogonal edges of the document mounting table, so that only a desired portion of the document is copied. It is something.

(Example) Hereinafter, the present invention will be explained in detail with reference to Examples shown in the drawings.

FIG. 1 is a diagram showing the arrangement of an exposure section of a partial copying apparatus according to the present invention in a copying machine, in which a light emitter array 2 is arranged close to a photoreceptor 1 and perpendicular to its running direction. The light-emitting array 2 may be one in which light-emitting bodies such as small lamps and LEDs are arranged in a line, and by selectively blinking these, unnecessary parts of the electrostatic latent image formed on the photoreceptor 1 can be removed. It can be erased before being developed in the developing device 3 in front of the light emitter array 2.

On the other hand, FIG. 2 shows an embodiment of a device for specifying a desired portion of a document to be copied by an operator, in which the operator specifies the portion to be copied along two orthogonal edges of the document table glass 4, and A display is placed to indicate this.

First, two sliders 6 and 7 are slidably attached to one edge of the document table glass 4 in the X-axis direction on a rail 8 in order to designate a copy area Cx in the width direction of the document 5. Each of the sliders 6 and 7 is provided with a proximity sensor (not shown), and a signal is emitted by the proximity of the scanning optical system that reciprocates on the lower surface of the document table glass 4.

Next, on one edge in the Y-axis direction, a divided light-emitting display array 9 and a switch array 10 for selectively causing these to emit light are arranged in parallel so as to correspond to each light-emitting body of the light-emitting body array 2.

When the operator presses a switch corresponding to both ends of the copy area cy in the depth direction of the original 5, it is convenient if the display corresponding to the cy portion lights up so that the copy area can be clearly determined.

At this time, it goes without saying that all the light emitters of the light emitter array 2 corresponding to the portion outside the cy area must be lit.

Now, as mentioned above, the light emitting array 2 and the display section 6
．． 7 and 9, a control circuit as shown in FIG. 3 may be used, for example.

That is, as shown in the figure, the light emitter array 2, the light emitting display array 9, and the switch arrays 10, 101, . . . are connected in parallel.
10. L, 10m - 10n-λ, 10n-1,
Two diode matrix A common to lOn
Prepare B. Both of these diodes 71-Rix A
and B are supplied with the necessary power from individual power supplies E1 and Eλ, for example, 5V voltage if the light emitter is an LED, and a 1ffl switch S1 operated by the operator is provided between these power supplies and the diode matrix. Place.

On the other hand, power is directly supplied to each of the light emitters of the light emitter array 2 and the input side to the light emitter of the display 9, and contacts p7, p! ,ps...
...and q+, qz...qlI-λ,
qn-+, Qh, and the ground side of the light emitting display array 9 are gathered together, and contacts β1, j2z, x,
-'-...- and ml, mz, """mh+λ%
It is configured to entertain after inserting mn-+ and rnh in series. It should be noted that the contacts p, q, jl! of the switch array 10 are connected to each other. and m are, for example, 10
When I closes, I'+, ql, j21 and ml open.

Furthermore, the ground sides of the light emitter array 2 are collectively grounded via the switch Sλ, and the switch Sλ is connected/disconnected using a signal obtained by adding a required delay to the signal from the proximity sensor provided on the sliders 6 and 7. This is how it was done. This delay is the time taken for the image projected on the photoreceptor 1 to reach the light emitter array 2 at the moment when the scanning optical system reaches the proximity sensor, and can be set in advance. Needless to say.

The control circuit configured as above operates as explained below.

Now, when the operator connects switch S+ to perform partial copying, all of the light emitter display arrays 9 are lit. Then, the operator selects 101 of the switch arrays 10.
When connected, each of the contacts p.

, ql , '4 and m are open, so the display array 9
Among them, 91.9λ and 93 are turned off, and 2+, 2z and 21 of the light emitter array 2 are turned on.

The operator then selects one of the switch arrays 10.
Similarly, when Q n-z is connected, 9n of display array 9,
9n-1 and 9n-λ go out, and 2n of the light emitter array 2
, 2n-1 and 2n-λ are lit.

In this way, when the operator specifies the copying range in the depth direction of the document, only the light emitters corresponding to the core of the display array 9 are lit, so there is no error in the instruction.

Further, the operator moves the sliders 6 and 7 to directly indicate the copy range in the document width direction.

When the operator who has finished specifying the copy range presses a copy start button (not shown), the scanning optical system starts moving. When the flip-flop FF provided between the proximity sensor and the switch Sλ is reset by this signal and the switch Sλ is closed, the light emitter array 2 is entirely illuminated.

Next, when the scanning optical system passes through one of the proximity switches, the flip-flop FF is turned on and the switches S and L are opened, so that three light emitters on each side of the light emitter array 2 are activated. Only one light is on and the other lights are off. Furthermore, the signal generated when the scanning optical system passes the second proximity sensor causes the flip-flop FF to be activated again.
By resetting , the entire light emitting array 2 lights up and only a desired range as shown in FIG. 2 can be copied.

(Effects of the Invention) Since the present invention is configured and operates as described above, it is possible to make partial copies extremely easily and at low cost, and since the display for the operator is clear, there is no possibility of erroneous operation. This has the effect of making handling easier and more reliable for inexperienced operators.

Furthermore, by using the apparatus according to the present invention, it is possible not only to make partial copies but also to eliminate the occurrence of black borders in copies.

[Brief explanation of the drawing]

1 and 2 are diagrams showing the arrangement of the light-emitting array for erasing unnecessary latent images, the operation on the original table, and the display device, respectively, of the partial copying device according to the present invention, and FIG. 3 is an illustration of the control circuit thereof. It is a figure showing an example. 1...Photoreceptor, 2...Light emitter array, 4...
・Document placement table, 5...Original, 6 and 7...Slider for displaying partial copy range, 9...Partial copy position display lamp, ]0...al; minute copy position designation switch・7chi. Figure 1 Figure 2

Claims (1)

[Claims] A means for displaying a desired position for copying an original placed on the original placing table along two orthogonal edges of the original placing table, and a means for displaying a desired copying position in the copying machine corresponding to the change of the display. By regulating the light emitting position and adjusting the overall light emitting timing of a light emitting array disposed on the surface of the photoreceptor at a position before the start of the developing process, only a desired portion of the document is copied. A partial copying device for a copying machine characterized by: