JPH03196162A - Both-side copying method from one-side document in image forming device - Google Patents

Abstract

PURPOSE:To perform the both-side copying of many one-side documents without getting out of the sequence of page by processing the document from the lowermost paper of a 1st group, performing both-side copying after making the 1st group to have an even number of pages by idly feeding the lowermost paper and processing the idly fed document with a 2nd group when the documents are odd number of pages. CONSTITUTION:This device is provided with a divided document setting part A, a recirculating document feeding part B, a 2nd stack tray 51, a 1st stack tray 521, a 2nd separating and feeding part 54, a 1st separating and feeding part 524, a platen 529, and a conveying belt 528. A series of many one-side documents is divided to many number parts D1 and D2, which are respectively placed on document platens 51 and 521, and the 1st group D1 is processed first in order to perform both-side copying in the sequence of page. The documents of the 1st group D1 are counted and such a control method that copying is started from the lowermost paper in the case of an even number of pages and that the lowermost paper is made to pass through and copying is started from the next document in the case of the an odd number of pages is performed. Thus, both-side copying is performed from the many one-side documents without getting out of the sequence of page.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a double-sided copying method from a single-sided original in an image forming apparatus equipped with a circulating original transport device having a plurality of original placing tables.

[Conventional technology]

Conventionally, a circulating type document conveying device having a plurality of document placing tables is provided as a document placing table for reservations in a circulating type document conveying device, as described in J.H. Publication No. 62-222939.62-65842. .

[Problem that the invention is trying to solve]

However, in the conventional example described above, it is difficult to process a large number of originals, for example, more originals than can be stacked on the original table.

[Means to solve the problem]

The present invention provides a method for creating double-sided copies in page order by dividing a series of multiple single-sided originals into multiple copies and stacking each copy on the document mounting table in a circulating document conveying device having a plurality of document mounting tables. First, process the first group.
By counting the number of originals in a group and using a control method that skips the bottom paper if it is an even number, skips the bottom paper if it is an odd number, and starts copying from the next original, the page order can be changed from a large number of single-sided originals. This makes it possible to perform double-sided copying without any trouble.

〔Example〕

FIG. 1 shows an embodiment of the present invention. In this embodiment, a case will be described in which there are two document loading tables (hereinafter referred to as document loading trays).

The automatic document feeder is composed of a document setting section A and a circulating document feed section B. Further, C is the main body of the image processing apparatus (in the case of B, the front/back reversing path is constituted by a switchback path, but a reversing path using a reversing roller or the like may also be used).

First, the document setting section A will be explained.

Reference numeral 51 denotes a stacking tray (second stacking tray) on which a set of original documents is set. A separating belt means 52 and a feeding belt means 53 are arranged downstream thereof, and by rotating in the direction of the arrow, they separate the originals from the bottom of the stacking tray 51 one by one. The belt means 52 and the feeding belt means 53 constitute a separation feeding section 54 (second separation feeding means).
.

Sheet paths (a) and (b) extend downstream of the separation section 54 (third sheet bus), and the platen 52 of the main processing section
Continued to 9. A pair of rollers 55 is provided to convey the document during passes (a) and (b). There is a path (c) (fourth sheet bus) branching from paths (a) and (b) in the switch direction, and extends toward the output tray 530 on the circulating document conveying section B. Further, a pair of rollers 57 is provided for conveying the document during pass ()X). The structure of the branch part is constituted by a flexible deflection plate. Also,
A second sensor S2 that detects the document on the tray 51 and a first sensor S1 that detects the document in pass (A) are provided.

Next, the circulating document transport section B will be explained (the B section is
(It is the same as the one in the section, and here the number is prefixed with 5.)
.

521 is a stacking tray (first stacking tray) on which documents are stacked. A separating belt means 522 and a feeding belt means 523 are arranged downstream thereof, and by rotating in the direction of the arrow, they separate the originals from the bottom of the stacking tray 521 one by one. The separating belt means 522 and the feeding belt means 523 constitute a separating feeding section 524 (first separating feeding means).

A sheet bath (g) is placed on a tray 52 downstream of the separating section 524.
It extends downwardly in an inverted manner (sheet bath of 1), and continues to the platen 529 of the processing section of the main body C.

A white full-face belt 528 is disposed opposite to the main body platen 529, and can transport the original on the platen 529. Also, pass (chi) (su) (nu) from platen 529.
extends upward and faces the tray 521 (second seat bath). Further, a pair of rollers 525 and 526 are provided to convey the original in each path. Also, a path for reversing the front and back of the original (reversing path)
A pair of rollers 527 are also provided.

Each path branch section is configured similarly to section A.

The upper surface 530 is an ejection tray.

Explain the operation.

a) Specifically, a 10-page single-sided original is divided into two, each with 5 pages, and the first one-sided original from pages 1 to 5 is divided into two.
An example will be explained in which a double-sided copy is to be made from a second group of single-sided originals of 6 to 10 pages.

In reality, when there are more documents than the number of sheets that can be stored in the document stacking tray (for example, when the number of sheets that can be stored in the document stacking tray is 30,
If there are 50 originals, divide them into two (30.20 sheets, etc.).

The first group (pages 1 to 5) are placed on the document stacking tray 521 in the second group D! (pages 6 to 10) are placed on the document stacking tray 51 (FIG. 2(a)). 1
In the mode for making double-sided copies of pages to pages 10 to 10, a-1) Set the original, press the key to select the double-sided copy mode from a single-sided original (not shown) on main body C, and press the start button.

a-2) The mode for counting the number of original sheets starts in section B.

That is, as shown in FIG. 1, the separation and feeding unit 524 separates the fifth page of the bottom original and passes it from (g) to (g).
→ (ch) → (nu) and is discharged onto the tray 521. The tray 521 is equipped with a recycle lever S (not shown) (for example, a lever driven by a photo ink converter and a DC motor), which determines the partition of a group of documents. A paper presence/absence detection sensor S4 is arranged along the route of the paper bus (g). When the copy is turned on, the sensor S (hereinafter referred to as the recycle lever S) shifts to the top of the document to indicate that there is paper, and when the first page of the document is conveyed from the top of the tray 521, it shifts to the bottom and indicates that there is no paper. complete cycle)
It is configured so that.

4, 3, and 2.1 pages are sequentially conveyed through the same operation process, and the number of original sheets is counted by the sensor S21S.

a-3) Since the number of originals is an odd number, the 5th page at the bottom is separated by
It is discharged onto the top of the page (FIG. 2(b)).

a-4) Pass the 4th page through the same paper bus and place it on platen 5.
29. One-sided copying of the main body (C) begins. The fourth page of copy paper C4 is placed in the intermediate tray 42 (
(Fig. 10) (Fig. 2 (C)). After copying is complete, the 4th page of original 04 passes through (ch) → (nu), and then goes to 5.
It is ejected onto the top of the page (FIG. 2(d)).

a-5) Subsequently, the third page is conveyed onto the platen, and the third page is copied onto the back side of the copy paper C4 (FIG. 2(d)).

a-6) Similarly, the second page and the first page were copied, resulting in a total of 1 to 4 double-sided copies (Figure 2(e)).

a-7) The recycle lever S returns to the top of the 1st page again, and the 5th page is separated → (G) → (Go) → (H).
→ Feed through (nu) and eject onto the first page (
Figure 2(f)).

a-8) Separate page 1 from page 4 → (g) →
The paper passes through the paper bus (f) → (b) → (c) and is discharged onto the tray 530 (FIG. 2(g)).

a-9) Position the recycle lever above the 5th page as shown in Figure 2(h).

a-10) Separate the 10th page of the manuscript in the second group → A) → Mou) → Go) → Ch) → Su) → Nu) - Lu) → O)
→ Wa) → Chi → He) → Chi) → Su → Nu) bus route,
The original is turned upside down and discharged onto the fifth page of the tray 521 (FIG. 2(i)).

a-11) Similarly, all documents of the second group are placed in the tray 52.
1 (Fig. 2 (j)).

a-12) Discharge the 5th page onto the 6th page through the following route: Separate → G) → Go) → H) → Su) → Nu) (Figure 2 (k))
).

a-13) Return the recycle lever S to the top of the 5th page. While the documents are being conveyed from the tray 51 to the tray 521, the number of documents in the second group on the tray 51 is detected by a sensor S,
Since it is possible to count by , one carryover document is counted up in this data (it is also possible to count by feeding the document in the same manner as in the first group D1). In this illustration, the number of original sheets is five plus one, making a total of six. Therefore, feed the manuscript from the 10th page of the bottom manuscript, 10, 9.8, and 7.
．． Make double-sided copies of pages 6 and 5 (Figure 2 (i)
). The recycle lever S falls down and one cycle ends.

a-14) As shown in Figure 2 (I), in a normal tray, the second group of copies is stacked on top of the first group of copies. If you store copies of the first group in the bin and copies of the second group in the second bin, the pages will be correct.

b) In the example of a) above, the number of originals in the first group is an odd number. When there is an even number of sheets, it is sufficient to copy from the bottom original without skip-feeding the bottom original and carrying it over to the second group of originals.

Although the present embodiment has been described above for the case of two trays, it is also possible to use two or more trays by repeating the same operation (for example, FIG. 8).

Incidentally, FIG. 9 shows a flowchart of the present invention.

In this embodiment, copy processing is performed from the first group (pages 1 to 5), but let us consider, for example, a case where processing is performed from the second group (pages 6 to 10). When the total number of original sheets is an even number, it is possible to copy in the order of the pages, but when the total number of sheets is an odd number, as shown in Figure 3 (a), if you start copying from the last page, the first page (first page) will be copied. (opposite side)
A white surface is created on the page (Figure 3(a)(b)(C)
)).

Figures 4 (a) to (e) show the case when the second group has an odd number of sheets. conduct. Although it is possible to copy pages in the same order with this method, a blank space will be created on the first page.

Also, without using the method of the present invention, when the first group has an odd number of originals,
If you copy from the bottom sheet without skipping the bottom sheet, the second
A margin is formed on the first page in the same way as when processing originals in groups.

Other Embodiments ■ In the present invention, since only part B in FIG. 1 can circulate the originals, it is not possible to count the number of sheets in a series of multiple originals at once. Therefore, the method described above is used. A double-sided copy was made from a divided single-sided original. However, as shown in FIG. 5, when it is possible to recycle the originals even in the A section, or when the user inputs the number of originals in advance using keys on the operation section of the copying machine main body, it is possible to process the originals from the last group.

Fig. 5 shows a case in which the A section can be recycled. When a single-sided original is placed on the document stacking trays 51 and 521 and the double-sided copy mode is specified, the A section and the B section are Enter number counting mode. Part B is carried out through the same path as described above, and after separation, part B passes through 4 buses a), 4), and y), and is reloaded on the document loading tray 51 at the switchback. deflection plate). When all original sheets have been counted, the tray 51゜521
Add up the numbers above to determine whether the total number of original sheets is odd or even.

When the total number of original sheets is an even number, and the number of originals in the second group is an odd number, copying starts from the bottom sheet of the second group as shown in Figure 6.a) From the 7th page to the 10th page Make a double-sided copy up to the first page (b) and skip to the 6th page c)
, eject the 7th to 10th pages d), transport the 1st to 5th pages of the 1st group to section B e), make the document group 1st to 6th page, and make the same double-sided copy. Do Cf>.

When there is an even number of originals in the second group, double-sided copies of pages 1 to 10 can be obtained by starting the copying operation without skipping the bottom original.

When all originals are an odd number of sheets and the second group is an odd number of originals, as shown in Figure 7, only the bottom sheet (9th page) of the second group is single-sided copied and the 9th page is the front side. b)
, make double-sided copies of pages 8 to 5 (C), eject all of the second group, and transport the first group of originals to section B.
) Make a double-sided copy.

When the second group has an even number of originals (e), the bottom page of the second group (9
eject page) as a one-sided copy f), page 8, 7
Make a double-sided copy of the page g), skip-feed the sixth page h), eject pages 7 to 9, and transport the first group from section A to section B (i).

Next, make double-sided copies of pages 1 to 6.
(j).

As explained above, in the case of a device configuration that can pre-count the total number of manuscripts, the second group (or, in the case of multiple manuscript groups,
It is also possible to start document processing from the last group) and perform double-sided copying.

Next, the overall configuration of the copying machine will be explained based on FIG. In the figure, C is a paper feeding section, which includes a cassette 30, 31, a manual feed tray 32, and a deck 33. D is a refeeding section, which includes a refeeding bus 41, an intermediate tray 42, and a refeeding roller 43.
, separation feed rollers 45, 44, refeed bus 46, and introduction roller 47. E is a sheet post-processing section, in which a sorter is arranged. Since both configurations are well known, a detailed explanation will be omitted, but the sheet material copied on one side is guided to the intermediate tray 42 through a bus 41 and rollers 47, and is stacked with the copy side facing up. Thereafter, the sheets are fed again from below by the rotation of rollers 42 and 43, separated into sheets one by one by separating and feeding rollers 44 and 45, and guided to the photosensitive drum through a bus 46. The sheet material printed on both sides passes through a discharge roller 48 and is discharged to a sorter.

Note that when copying is performed on only one side, after copying is completed, the paper is ejected from the ejection roller without entering the re-conveyance bus.

〔Effect of the invention〕

As explained above, when the original is processed starting from the bottom paper of the first group and the number of originals is an odd number, double-sided copying is performed by skip-feeding one sheet of the bottom paper and an even number of sheets in the first group. By performing the same processing up to the last group by processing together with the second group, double-sided copying of a large number of single-sided originals is made possible without disturbing the pages or performing copying.

[Brief explanation of drawings]

Figure 1 is a sectional view of the present invention, Figures 2 to 4 are schematic diagrams of the present invention, Figure 5 is another embodiment, Figures 6 and 7 are schematic diagrams of other embodiments, and Figures 6 and 7 are schematic diagrams of other embodiments. FIG. 8 is a sectional view of another embodiment of the present invention, FIG. 9 is a flowchart, and FIG. 10 is a front sectional view showing the entire copying machine. Part A...Divided document setting section B section...Circulating document transport section 51...Second stacking tray 521...First stacking tray 54...Second separation feeding section 524 ...First separation and feeding section 529...Platen 528...Conveyor belt (C) - (d) A (C) (J) (Ka) (1) -〇((d) -- -ra (C) (d) e (e) (f) 謬7fig (α) (b) 111-2ka (C) (d)

Claims (1)

[Claims] (1) From a single-sided original in an image forming apparatus that has at least two or more document placement tables and is equipped with a circulating document conveyance device that transports multiple sheets of documents on the document placement tables onto the document platen. In the double-sided copying method, a large number of originals N with consecutive pages are divided (divided with the first page at the top, and the first group n_1~
n_1 pages, second group n_1_+_1 to n_2_1, third group n_2_1_+_1 to n_3_1, etc.), and place them on the document mounting table, and then load the first group of originals (n_1 to n_1).
_1) A double-sided copying method from a single-sided original in an image forming apparatus, characterized in that a copying operation is started from _1) and double-sided copying is performed from a single-sided original. (2) When the number of originals on each document mounting table in each group except the last group is an odd number, the bottom sheet is skip-fed without being copied, the originals are made into an even number, double-sided copying is performed, and after copying is complete, 2. The double-sided copying method from a single-sided original in an image forming apparatus according to claim 1, wherein the blank-fed original is processed together with the next group of originals.