JPH04257879A - Controller for image forming device - Google Patents

Abstract

PURPOSE:To obtain a copy without turbulence of an image, without reducing a consecutive copying speed, in an OHP mode for copying an OHP sheet. CONSTITUTION:A controller for an image forming device having the attachment of a sorter has a control means 1 which selects a group mode in which a bin is moved whenever a repeat final copying sheet is carried in, in the case the number of the set OHP sheets is one, and a sort mode in which the bin is moved whenever a repeat copying sheet is carried in one by one, in the case the number of the set OHP sheets is two or more, when the OHP sheet is set.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to an image forming apparatus such as a copying machine or a printer equipped with a sorter, and in particular, image forming is characterized by sorter control in an OHP mode in which a copy operation is performed using OHP paper. The present invention relates to a control device for a device.

0002

[Prior Art] For example, in the case of a wet-type copying machine, the developer is a liquid consisting of a solvent and toner.
Although some of the solvent seeps into the paper fibers on the transferred copy surface, it is still wet with the developer, but by heating in the fixing section, the excess solvent is evaporated and the toner is also hardened. The fixation is completed. On the other hand, OH
In the case of P paper, since the solvent does not seep into the inside, the image surface is not completely fixed even after fixing.

0003

Therefore, there has been a problem in that when the copy surface of the OHP paper is rubbed by the OHP paper that is subsequently discharged, the image becomes distorted and the image quality deteriorates. To prevent this, it is possible to evaporate the residual solvent on the paper surface (secondary fixing), but in that case, it is necessary to delay the start of the next copy, which has the disadvantage of causing a significant decrease in copy speed. . The present invention has been made based on this background, and an object of the present invention is to obtain copies without image distortion without reducing the continuous copy speed in an OHP mode for copying OHP paper.

0004

[Means for Solving the Problems] The above object is to provide a control device for an image forming apparatus equipped with a sorter, in which when OHP paper is set and the number of sheets set is 1, each time a repeat final copy paper is brought in. A first means comprising a control means for selecting a group mode in which the copying paper is returned to the first bin, and selecting a sorting mode in which the bin is switched each time a repeat copy paper is brought in one by one when the number of sheets set is two or more. This is achieved by In addition, the above purpose is to, when OHP paper is set in the same type of control device,
This is achieved by a second means including a control means for selecting a sorting mode for switching bins each time a sheet of repeat copy paper is brought in one by one. Furthermore, in the same type of control device, when OHP paper is set, the group mode returns to the first bin each time the last repeat copy paper is carried in, and the group mode returns to the first bin each time the repeat copy paper is carried in one by one. This is achieved by a third means that includes a control means that prohibits the selection of a sorting mode that switches bins every time OHP sheets are carried into the sorter, and controls the bins to be switched every time OHP sheets are carried into the sorter.

[0005]

[Operation] In the case of OHP paper, the copy surface immediately after passing through the heat fixing section is not completely fixed, and until the residual solvent on the paper surface is evaporated and the secondary fixation is completed, the copy surface will not be completely fixed. should be avoided from touching the paper. Therefore, in the OHP mode, the first method selects the group mode when the number of copies set is one, the sort mode is selected when the number of copies set is two or more, and the second method selects the sort mode univocally. However, in the third means, the bins are switched each time OHP sheets are carried into the sorter. In any of these means,
The next OHP paper that follows the OHP paper ejected into one bin is ejected into another bin, and the second OHP paper is ejected into the first bin.
Since it takes time for the paper to be ejected, secondary fixing is performed on the copy surface to stabilize the image quality.

[0006]

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings. FIG. 1 is a block diagram of the entire copying machine to which the present invention is applied, in which 20 is a main body, 21 is an ADF, and 22 is a sorter. The main body 20 has two paper feed cassettes 23 and a manual paper feed stand 24 mounted on its sides, and a photosensitive drum 25 inside. 26 is a transfer section, and 27 is a heat fixing section. The sorter 22 also has a paper discharge sensor 28 and a multi-stage (for example, 20
It is equipped with movable bins 29 arranged in stages. The OHP sheet set on the manual feed table 24 is fed into the machine when printing is turned on, the toner image formed on the photoreceptor drum 25 is transferred by the transfer section 26, heated by the fixing section 27, and conveyed to the sorter 22. be done. The sorter 22 operates in a sort mode in which the bin 29 moves each time a repeat copy paper is carried in one by one, a group mode in which the bin 29 moves each time the final repeat copy paper is carried in, and a bin 29 mode in which the bin 29 moves each time a repeat copy paper is carried in one by one.
It has three modes, including an off mode in which it does not move.

FIG. 2 is a configuration diagram of the operation board. The operation board 30 has a print key 31, a number setting key 32, a cassette selection key 33, an exposure adjustment key 34, a magnification selection key 35, an OHP key 36 for specifying an OHP mode, a sorter key 37, and the like.

FIG. 3 is a block diagram of a control device according to this embodiment, in which 1 is a CPU, 2 is a RAM, 3 is a ROM, 4,
5 is an I/O port, 6 is a driver, 7 is a group of display elements on the operation board shown as blocks, 8 is a group of key switches,
9 is a sensor group, 10 is a pulse transmitter, and 11 is a buffer.

FIGS. 4 and 5 are control flowcharts according to the first embodiment. When the OHP mode is set (S1) and the number of sheets to be set is 1 (Y in S2),
It is programmed to set the group mode (S3) and, if the number of sheets set is 2 or more (N at S2), to set the sort mode (S4). Here, if you want to make 5 OHP copies each from 2 originals, first
When the OHP mode is selected using the HP key 36 and the number of copies is then set to 5, the sort mode is automatically selected. The copy operation is started by the print key 31, and when the first sheet of OHP paper is carried into the 1st bin of the sorter 22, the bin 29 moves by 1 bin, and the 2nd sheet of OHP paper moves by 2 bins.
transported to the bin. Subsequent copies are then imported into bins 3 to 5, respectively. When the copying of the fifth sheet is completed (end of repeat), the bin 29 moves to the original bin 1, and on the other hand, by setting the second original and pressing the print key 31, the second original is copied. Start, each O
The HP paper is carried in on top of the OHP paper on which the first original has been copied. In this case, after the first sheet of OHP paper is brought in, there are two
Since the time necessary for the next fixing is secured, image drift (image rubbing) does not occur. Next, one OHP page from each of the 10 originals.
When making copies, the group mode is selected from the OHP mode and the number of sheets set = 1. Therefore, each time an OHP paper is carried into the sorter 22, the bin 29 is moved and the bin 29 is moved.
Sheets of OHP paper are each stored in bins 1 to 10, and image deletion does not occur.

FIG. 6 is a control flowchart according to the second embodiment, in which pressing the OHP key 36 (S11
), the OHP mode is set (S12), and the sorting mode is automatically selected (S13). Here, if five OHP copies are to be made from each of two originals, first the OHP mode is selected using the OHP key 36, and then the sort mode is automatically selected. Next, set the number of copies to 5 and press the print key 31 to start the copying operation. 1st OH
When the P paper is carried into the 1st bin of the sorter 22, the bin 29 is moved by 1 bin, and the 2nd OHP paper is carried into the 2nd bin. Subsequent copies are then imported into bins 3 to 5, respectively. When the copying of the fifth sheet is completed (end of repeat), the bin 29 moves to the original bin 1, and on the other hand, by setting the second original and pressing the print key 31, the second original is copied. The process starts, and each OHP sheet is carried in on top of the OHP sheet on which the first original has been copied. In this case, since the time necessary for secondary fixing is secured from when the first sheet of OHP paper is carried in until when the second sheet of OHP paper is carried in, image drift (image rubbing) does not occur.

FIGS. 7 and 8 are control flowcharts according to the third embodiment. FIG. 7 is a flowchart for setting the sorter mode in the OHP copy mode. When the OHP mode is set (S21), the program is programmed so that the group mode or sort mode is not set (S22). FIG. 8 is a flowchart of the bin movement control of the sorter 22. In the OHP mode, each bin is moved one by one each time paper is carried in (S31), and when it reaches 20 bins (Y in S32), it returns to the original one bin. It is programmed to return to (S33). Here, from each of the two manuscripts, 5
When making OHP copies one by one, first press the OHP key 36.
When the OHP mode is selected, the sorter key 37 becomes invalid. Next, set the number of copies to 5 and press the print key 31 to start the copying operation. 1st O
When HP paper is carried into bin 1 of sorter 22, bin 29
is moved one bin, and the second OHP sheet is carried into the second bin. Subsequent copies are then imported into bins 3 to 5, respectively. When the fifth copy is completed (repeat ends), A
The second original is automatically fed from the DF 21, copying of the second original starts, and each OHP sheet is subsequently carried into the 6th to 10th bins. Therefore, all copied OHP sheets are stored in separate bins, so
No image blurring (image blurring) occurs.

[0011]

Effects of the Invention In the OHP mode, in the invention according to claim 1, when the number of copies set is one, the group mode,
When the number of sheets set is two or more, the sort mode is selected, and in the invention set forth in claim 2, the sort mode is uniquely selected, and in the invention set forth in claim 3, each time OHP paper is carried into the sorter, Since the bins are switched, in both of these inventions, the next OHP paper following the OHP paper ejected to one bin is ejected to another bin, and the second OHP paper is ejected to the first bin. Since it takes time for the copy surface to be fixed, the image quality can be stabilized by performing secondary fixing on the copy surface.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of a copying machine to which the present invention is applied.

FIG. 2 is a configuration diagram of an operation board.

FIG. 3 is a block diagram of a control device according to an embodiment of the present invention.

FIG. 4 is a control flowchart according to the first embodiment.

FIG. 5 is a control flowchart according to the first embodiment.

FIG. 6 is a control flowchart according to a second embodiment.

FIG. 7 is a control flowchart according to a third embodiment.

FIG. 8 is a control flowchart according to a third embodiment.

[Explanation of symbols]

1 CPU 20 Main body 22 Sorter 23 Paper cassette 24 Manual feed tray 25 Photoreceptor drum 26 Transfer section 27 Fixing section 28 Paper discharge sensor 29 bottle

Claims (3)

[Claims] Claim 1: In a control device of an image forming apparatus equipped with a sorter, when OHP paper is set, if the number of sheets set is 1, a group is returned to the first bin each time the final repeat copy paper is carried in. A control device for an image forming apparatus, comprising a control means for selecting a mode and selecting a sorting mode for switching bins each time repeat copy paper is carried in one by one when the number of sheets set is two or more. 2. A control device for an image forming apparatus equipped with a sorter, comprising control means for selecting a sorting mode for switching bins each time repeat copy paper is carried in one by one when OHP paper is set. A control device for an image forming apparatus, characterized in that: 3. In a control device for an image forming apparatus equipped with a sorter, when OHP paper is set, there is a group mode in which the repeat copy paper returns to the first bin each time the last repeat copy paper is carried in, and a group mode in which the repeat copy paper returns to the first bin each time the last repeat copy paper is carried in. A control device for an image forming apparatus characterized by comprising a control means for prohibiting selection of a sorting mode in which bins are switched each time an OHP sheet is carried into a sorter, and controlling the bin to be switched each time an OHP paper is carried into a sorter. .