JPS6218576A - Electrophotographic copying machine - Google Patents

Abstract

PURPOSE:To completely eliminate the nuisance of copying work by setting arbitrarily in a reverse copying mode the number of sheets to be copied within a range of a copying number in a surface copying mode. CONSTITUTION:In order to transfer three copies of an original C on the rear side of copying forms, the original C is placed at the prescribed position of an original placing table 14 instead of an original B. A clear key 32 is pressed, a set value '7' is reset and the copying number (three copies) is set through a ten-key 31. When a print key 33 is pressed, the rear copying is executed one by one. When the copying number of the original B reaches the set number, here is no remaining copying paper on an intermediate tray 10 to complete the prescribed copying. If the rear copying number is set over the number of copying forms stored temporarily on the intermediate tray 10 in the rear copying mode, the copying number may be newly set within the number of copying forms, because a set number modification is indicated to a display part 37.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an electrophotographic copying machine having a double-sided copying function [Prior Art] Generally, in an electrophotographic copying machine having a double-sided copying function, a double-sided copying mode is used. is selected, first the front side copying is performed on one side of the copy paper for the set number of copies using the front side copying mode, the copy paper is temporarily docked on the intermediate tray for duplex copying, and then the front side copying is performed using the back side copying mode. The apparatus is configured to copy the reverse side of the copy sheet on the other side of the copy sheet after copying has been completed, and to discharge the paper to a paper discharge tray. Therefore, in such a copying machine, operation is relatively easy when two types of originals are used to make the same number of copies on both the front and back sides.

[Problem that the invention seeks to solve]

However, with the above-mentioned copying machine, for example, when copying 5 sheets each of B and C originals on the back side of 10 sheets of copy paper with front side copies of A original, 5 copies of A original are made on the front side and 5 copies of B original are made on the back side. It is necessary to perform operations such as copying the front side of 5 copies of original A and copying the back side of 5 copies of original C, making the handling of originals and copy paper very complicated.

On the other hand, as shown in Japanese Unexamined Patent Application Publication No. 57-148759, there is a device that temporarily cancels the back side copy mode and outputs the paper with the back side blank when in the back side copy mode of the double-sided copy mode. However, with this conventional technology, when copying the back side of a copy paper with a blank back page, the copy paper with a blank back page ejected to the paper output tray must be sent to the paper feed side each time, which makes the copying work complicated. It has not yet been possible to completely eliminate the problem.

The present invention has been made with the above-mentioned considerations in mind, and an object of the present invention is to provide an electrophotographic copying machine having an easy-to-use double-sided copying function that completely eliminates the troublesomeness of copying operations.

[Means for solving problems]

In order to achieve the above object, the electrophotographic copying machine of the present invention has the following features:
The present invention is characterized in that the number of copies can be set and input within the range of the number of copies in the front copy mode when in the back copy mode of the double-sided copy mode.

[Effect]

According to the above configuration, the number of copies can be arbitrarily set in the back side copy mode within the range of the number of copies in the front side copy mode.

〔Example〕

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

FIG. 1 schematically shows an electrophotographic copying machine 1 according to the present invention, in which a main body 2 includes a photoreceptor 3, a developing device 4, a transfer device 5,
, a separating device 6, a fixing device 7, a copy paper path switching device 8, a paper ejection device 9, an intermediate tray 10, a switchback section 11, and the like. 12 is the paper feeding power cent as a paper feeding unit;
Reference numeral 13 indicates a paper ejection tray as a paper ejecting section, and 14 indicates a document placement section.

FIG. 2 shows a schematic configuration of the control section 20 and operation section 30 of the electrophotographic copying machine 1. The control section 20 includes a central processing unit (CPU) 21, a program memory (ROM>2
2, Data memory (RAM) 23, Crowd 'jJ equipment W
(Ilo) 24, etc., and according to the program stored in the ROM 22, performs sequence control of the electrophotographic copy ml and control according to the present invention.

On the other hand, the operation unit 30 includes a numeric keypad 31 for setting the number of copies.
, a clear key 32, a print key 33, a double-sided copy mode selection key 34 for selecting a double-sided copy mode, a double-sided copy mode indicator 35 that indicates that the double-sided copy mode is selected, a back copy mode display 36 that displays the back copy mode, etc. is provided. Reference numeral 37 is a display unit that displays the set number of sheets, failure location, etc.

The operations of the various keys 31 to 34 of the operation section 30 are input to the C-PU 21 via the l1024 of the control section 20, and the control section 20 is input to the display 35, 36 of the operation section 30 via the l1024. , controls each device of the display section 37 and main body 2.

Next, a method of operating the double-sided copy mode of the electrophotographic copying machine 8!11 will be explained with reference to the flowchart shown in FIG. In the following, St to S20 indicate steps in the flowchart.

Now, a case will be described in which 10 copies of the original A are copied on one side of the copy paper, and 7 copies of the original B and 3 copies of the original C are copied on the other side.

First, in order to copy 10 copies of the front side of original A, original A is placed at a predetermined position on original placing section 14 . The number of copies (10 copies) is set using the numeric keypad 31, and the double-sided copy mode is selected using the double-sided copy mode selection key 34 (Sl). Here, if it is the double-sided copy mode (S2), the copy paper path switching device 8 is switched to the position shown by the imaginary line in FIG. At this time, the double-sided copy mode indicator 35 lights up, and the number "10" representing the set number of copies is displayed on the display section 37.

On the other hand, if it is not the double-sided copy mode (S3), the copy paper path switching device 8 is switched to the position shown by the solid line in the figure.

Then, when the print key 33 is pressed (34), the front side copy mode is entered, and front side copying of double-sided copying is started (S5). Sent to 10. When the number of copies becomes equal to the set number of copies (S6), it is determined whether double-sided copying is to be performed (S7), and if double-sided copying is required (S8), the first side copying is completed and the copy paper path switching device 8 It is switched to the position shown by the solid line in Figure 1. At this time, the back side copy mode indicator 36 flashes to indicate that the back side copy mode is on standby.The 10 sheets of copy paper on which front side copying has been completed are temporarily stocked in the intermediate tray 10, and are fed from the intermediate tray 10. The copy paper path is switched to print the paper (S9).

Next, in order to copy the back side of seven copies of the Japanese original, the B original is placed at a predetermined position in the original iii section 14 in place of the A original. Press the clear key 32 (51O) to reset the set value 10, and set the number of copies (7 copies) using the numeric keypad 31 (Sll). At this time, the number '7° indicating the set number of sheets is displayed on the display section 37.

Then, when the print key 33 is pressed (312), the mode changes to the M side copy mode, the back side copy mode indicator 36 changes from flashing to lit, and the back side copying is performed one by one (S13).
), the copy sheet on which the reverse side has been copied is discharged onto a paper discharge tray 13 via a paper discharge section 9. When the number of copies of this B original reaches the set number (S14), three copies still remain in the intermediate tray 10 (S15). At this time, the back copy mode indicator 36 changes from lighting to blinking, indicating that the back copy mode is on standby.

Next, in order to make three back side copies of the C original, the C original is placed at a predetermined position on the original placing section 14 in place of the B original. Press the clear key 32 (5IO), reset the set value "7', and set the number of copies (3 copies) using the numeric keypad 31 (Sll). At this time, the display 37 shows the number "3" indicating the set number of copies. ” is displayed.

Then, when the print key 33 is pressed (S12), the back side copy mode indicator 36 changes from flashing to lit, back side copying is performed one by one (S13), and the copy sheets that have been back side copied are sent to the paper ejection section 9. Then, the paper is discharged onto the paper discharge tray 13.

When the number of copies of this B original reaches the set number (S14
), there is no copy paper remaining in the intermediate tray 10 < (
S16), and the predetermined copying is completed (S17). At this time, both the double-sided copy mode indicator 35 and the back-sided copy mode indicator 36 are turned off.

Then, when the number of back side copies is set to exceed the number of copy sheets temporarily stocked in the intermediate tray 10 in the back side copy mode (318), an instruction to change the set number of sheets is displayed on the display section 37 (S19). ), the setting may be made again within the range of the number of copies.

Note that the display unit 37 may display the settable number of back side copies.

In addition, when making the same number of copies on both the front and back sides of copy paper using A original and B original, when the front side copy of A original is completed,
Just replace the original and press the print key 33 (S
12).

It goes without saying that the electrophotographic copying machine has a normal single-sided copying function (S20).

〔Effect of the invention〕

As explained above, according to the present invention, the number of copies can be arbitrarily set in the back side copy mode within the range of the number of copies in the front side copy mode, so the hassle of copying work can be completely eliminated. As a result, the functionality of an electrophotographic copying machine having a double-sided copying function has been improved, and its usability has been significantly improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG.
The figure shows a schematic configuration of the control section and operation section of the electrophotographic copying machine, and FIG. 3 is a flowchart executed by the control section. 1...Electrophotographic copying machine.

Claims (1)

[Claims] An electrophotographic copying machine having a double-sided copy function, characterized in that the number of copies can be set and input within the range of the number of copies in the front copy mode when in the back copy mode of the double-sided copy mode.