JPH0452944B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to an image forming apparatus such as a copying machine.

(Prior Art) When copying multiple originals, it may be necessary to copy the first original and the remaining originals separately.

In such a case, conventionally, only the first document was copied using a specific paper in a specific paper feed tray by manual operation, and the second and subsequent documents were copied by switching to the normal paper tray. However, since copying the first sheet and the remaining originals are separate copy operations for the copier, when the operator selects the tray for the second time, no warning is given even if the operator selects a tray with a different paper size. Unable to utter,
There is a risk of copying mistakes.

(Purpose) The present invention has been made in view of the drawbacks of the conventional examples, and it is possible to use color paper, etc., for copying documents, depending on the purpose and importance of the document, even just for the first page. It is an object of the present invention to provide a control device for a copying machine that can automatically select paper different from copy paper.

(Structure) The structure of the present invention will be described below based on illustrated embodiments.

FIG. 1 is a front view of a copying machine embodying the present invention. 1 is a main body of the copying machine, 2 is a sorter, 3 is an automatic document feeder, 4 is an operation section, and 5 is a display section.

FIG. 2 is a detailed front view of the operating section 4. 6-8
are the reduction ratio keys of 100%, 86%, and 71%, 9 to 11 are the press confirmation display, 12 is the copy number set display, 13 is the copy execution number display, and 14 is 0 to 9
15 is the clear key for numeric key input, 16 is the copy stop key, 17 is the print key to start printing, 18 to 21 are the main body 1
selection keys 22 to 25 are press confirmation indicators; 26 is a key indicating that the document to be copied is a confidential document;
7 is a key indicating that the document to be copied is an emergency document, 28 and 29 are push confirmation indicators, 30 is a sort key for using a sorter, and 31 is a push confirmation indicator.

FIG. 3 is a partially detailed front view of the display 5. FIG. 3
2 is a mismatch display that is displayed when the paper size in the specific tray for copying confidential documents or emergency documents does not match the paper size in the tray selected with the paper feed tray selection key, and 33 is a jam display, etc. Both are displayed on EL display tubes, etc.

FIG. 4 shows part of the contents of the RAM in the control section 34, which will be described later. Number of copies entered, selected tray
Along with N ₀ , various clubs F ₁ to F ₅ , document counter C ₀ , and the tray actually used for copying.
Stores N ₀ .

FIG. 5 is a block diagram of the control section 34. 35
is a μCPU such as Intel 8085, and 36 is a keyboard/
A display interface, 37 is the operating section 4, a keyboard display section of the display section 6, 38 is a ROM in which a control program is stored, 39 is the aforementioned RAM, 40,
41 is an I/O interface, 42 to 44 are
1 document sensor in the automatic document feeder, document ejection sensor, paper size sensor in the paper feed tray, etc.
1 is an example photointerrupter and resistor. 45 to 48 are conceptual diagrams of an EL drive driver and an EL display tube in the display 5.

The details of the control by the control device 34 will be explained with reference to the flowcharts of FIGS. 6 and 7.

In FIG. 6, before entering the copy routine, it is determined whether the mode is a confidential document copy mode or an emergency document copy mode, and a specific tray for the first sheet is determined. In the flowchart, whether or not it is the first original is determined based on the value of the original counter _C0 . The document counter _C0 counts up based on the signal from the document discharge sensor. Also, ADF flag F ₄
is set and reset by the signal from the document sensor. When the document counter C ₀ ≠ 0, the selected paper feed tray is set as the tray to be used, and its N ₀ is stored in a predetermined position in the RAM. During this routine, the size mismatch flag _F5 is determined, and copying is prohibited when there is a mismatch. Note that a first tray and a second tray are used as the specific trays, and colored paper such as red or yellow, or paper printed in a specific format is set in each tray.

FIG. 7 is a flowchart for determining whether the paper size in a specific tray and the paper size in a selected tray match or do not match. The selected tray is compared with the first tray in the confidential document copy mode, and with the second tray in the emergency document copy mode. When there is a mismatch, the mismatch indicator lights up and flag _F5 is set.

Note that by modifying the flow, it is possible to easily feed paper from a specific tray not only for the first document but also for the final document.

(Effects) According to the present invention, when an automatic document feeder is used, there is no need to set the other documents again after setting and copying the first document. Copying in the selected specific image forming mode can be performed automatically by simply setting the setting to .

Furthermore, by switching the paper tray after detecting the ejection of the first document, it is possible to switch the paper tray after confirming that there is no paper jam in the automatic document feeder. In the unlikely event that a conveyance jam occurs with the first document and the document must be reset to the automatic document feeder, the paper feed tray has not been switched at this point. Therefore, jam recovery can be easily performed. Furthermore, since the discrepancy between the paper size in a specific tray and the paper size in a selected tray is displayed, there is an effect that copying is not performed on paper of a different size.

[Brief explanation of drawings]

1 is a front view of a copying machine according to the present invention, FIG. 2 is an enlarged front view of the operating section, FIG. 3 is a partially enlarged front view of the display section, FIG. 4 is a diagram showing the RAM area, and FIG.
The figure is a control block diagram according to one embodiment, and FIGS. 6 and 7 are operational flowcharts. 3...Automatic document feeder, 4...Operation unit, 35
...control section.

Claims (1)

[Scope of Claims] 1. An automatic document feeder having a document detection means for detecting discharge of a document; a counter that counts up in response to a signal from the document detection means; means for determining whether the document conveyed by the document feeder is the first document; a plurality of paper feed trays; and selecting one paper feed tray from the plurality of paper feed trays. a selection key, a designation key for designating a specific image formation mode, and when the specific image formation mode is designated by the designation key, for the document determined to be the first document by the determination means; feeds paper from a specific paper feed tray among the plurality of paper feed trays, and when the count value is incremented by the count value for the first document, the feed from the specific paper feed tray is executed. The paper feed tray is switched from the paper tray to the paper tray selected by the selection key to execute paper feeding, and when the count value is incremented by the counter to the count value for a document other than the first sheet, the selection key is pressed. an image forming apparatus comprising: a control means for continuing the feeding of paper from the paper feed tray selected by the paper feed tray; and a means for forming an image corresponding to the original image on transfer paper fed from the paper feed tray. Forming device. 2 size detection means for detecting the transfer paper size in each of the paper feed trays; a display means; and the transfer paper size in the specific paper feed tray detected by the size detection means and the transfer selected by the selection key. 2. The image forming apparatus according to claim 1, further comprising means for displaying a warning on said display means when paper sizes are different.