JPS628171A - Image forming device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an image forming apparatus, and particularly to sorting multiple copies of formed images in an image forming apparatus equipped with a plurality of paper cassettes.

[Prior art]

In conventional image forming apparatuses, such as copying machines, in the case of so-called group copying, in which multiple copies of a document consisting of multiple sheets are made, a sorter is installed on the paper output side (exit) of the copying machine equipped with a document feeder for originals. (a device for sorting) was installed to sort each part of the copy.

However, in such cases, the copying machine requires a relatively expensive sorter, etc., which is generally uneconomical for users who make only a small number of copies, as the cost of the sorter becomes relatively high. There was a drawback.

〔the purpose〕

The present invention has been made in view of the problems of the prior art. The purpose of this paper is to feed paper of a different type than cedar bark paper, thereby facilitating the sorting of each section at low cost.

〔Example〕

The present invention will be explained below based on examples. FIG. 1 is an explanatory diagram of a schematic configuration of an embodiment of an electrophotographic copying machine according to the present invention. 1 is a photosensitive drum ゛ as an image carrier rotating at a predetermined speed in the direction of arrow X with 0 as the center;
2 is a □charger located at the most upstream side of the above-mentioned rotation path, and is used to uniformly charge the surface of the photoconductor positively; 5;
6 is an exposure duct for isolating the original image light flux from the optical system from the surroundings; 6 is a blank exposure device for erasing charges in unnecessary portions outside the image area; 7 is for controlling the surface potential of the photoreceptor drum l; 3 is a potential sensor for measurement, and 3 is a first developing device (
4 is a second developing device (the toner is, for example, red); 8 and 9 are eccentric cams for converting the first developing device 3 and the second developing device 4, respectively; 10 is a charger for image transfer and transfer paper separation, and 11 is a cleaner for removing residual toner after transfer. Reference numerals 12 and 13 designate a plurality of paper cassettes, each containing paper of a different color (for example, 12 is white paper for copying, and 13 is yellow paper for sorting). 14, 15, and 16 are paper guides for the paper movement path.

In addition, FIG. 2 shows a control circuit block diagram of this embodiment. Reference numeral 21 denotes a CPU (mainly a microcomputer).
Central processing unit, 221tROM (read-only memory)
, 23 is RAM (random access memory), 24 is
LED (light emitting diode) for displaying the number of copies, and 2
5 is an I/F (interface section), which connects the CPU 21. R
This is for connecting the OM 22, RAM 23, etc. and an external input device. 26 is a printer (copy 411) control circuit, 27 is a printer section, 28 is a + (plus) key for setting the number of copies, 29 is a - (minus) key, and 30 is a black button (for selecting a copy color (developing device)). 31 is a black (red) key, 32 is a group key for setting the number of copies, and 33 is a print key for copying.

Next, the operation of this embodiment with the above configuration will be explained with reference to FIGS. 1 to 3. FIG. 3 is a 70-chart of the operation sequence of this embodiment.

First, place multiple originals on a document feeder (not shown) and press the + key 28 (and/or the 1 key 29 together) until the desired number of copies is displayed on the LED 24 to set the number of copies. .

Assume that the copy color is 2. For example, black is selected using the black key 30. Next, press the group (number of copies) key 32 to set the group door Bee mode, and then press the print key 3.
When you press 3, the CPU 21.

The print control circuit 26 determines that the document placed on the document feeder is to be group copied.
, sends a command signal to the printer section 27, and outputs a command signal to the first developing device (
Set the paper cassette (black) 3 via the eccentric cam 8 and select the paper cassette (white) 12. This copies the original on the document feeder.

When the copying of one sheet of original is completed, the CPU 21 judges this, so the detection circuit for judgment is omitted).
3 and feed one sheet of yellow paper for sorting. After that, restore the paper cassette to (white) 12 again.

Next, the original placed on the document feeder is copied again, and the above-described operation is repeated until the set number of copies is completed.

As described above, since yellow sheets of different colors are inserted for each group sorting section, sorting becomes easy without the need for a sorter or the like.

Although the flowchart in FIG. 3 illustrates the case where black is selected as the copy color in the main flow (first developer 3), it is of course possible to select black as the copy color (second developer 4). Moreover, the bypass flow shown in the figure shows the case of single copy, and since this flow is the same as the conventional example, the explanation will be omitted.

Further, although the configuration is such that a sheet number counter (not shown) is normally incremented each time a copy is taken, the sheet number counter may or may not be incremented when sending out sheets for sorting.

In addition to using paper of different colors, you may also use paper of different sizes.

Although the above embodiment has been described in the case of an electrophotographic copying machine, the present invention is not limited to this, and can be applied to other image forming apparatuses that require this type of sorting.

〔effect〕

As described above, according to the present invention, when the image formation for each number of copies is completed, the sorting is configured to feed different types of paper for different purposes. It is now possible to easily sort by number of copies at low cost, without requiring expensive equipment such as sorters.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a general configuration of an embodiment of an electrophotographic copying machine according to the present invention, and FIG. 2 is a block diagram of its control circuit.
FIG. 3 is an operation sequence flowchart of this embodiment. 1......Photosensitive drum 3/4......First/second developing unit 12
．． 13... Paper cassette 21...
・・・・・・・・・CPU32・・・・・・・・・・・・
・・・Group (number of copies) key Figure 1

Claims (1)

[Claims] When forming images on multiple copies of multiple originals, different types of paper are stored in multiple cassettes, and the different types of paper are fed each time image formation on each of the multiple copies is completed. An image forming apparatus characterized by comprising: