JPS6087143A - Automatic paper feeder - Google Patents

Abstract

PURPOSE:To select a desired paper-size and feed the paper sheet by mounting several kinds of cassette and permitting automatic selection for paper feeding means on switching side. CONSTITUTION:When an A4-size cassette and an A3-size cassette are mounted onto the upper stage and the lower stage respectively, and copying is performed onto the A3-size form-sheet, a lower-stage detection switch 12-1 is turned ON, and the output of an inverter 52 is reversed from H to L. Therefore, a differentiation signal is input into the reset terminal R of a flip-flop circuit 55 through a differentiation circuit 54, and the flip-flop circuit 55 is reset. Therefore, an AND- gate 62 is closed and an AND-gate 63 is opened by the reset output Q in H-state of the flip-flop 55, and a lamp 37b which indicates that the lower stage is selected comes ON, and a lamp indicating A3-size comes ON. At this time, an AND gate 66 for selecting a paper feeding roller on the lower stage is operated, and if a paper feeding signal is output from a copy controlling circuit 67 after the operation of a printing switch, a solenoid 120 is driven through a switching circuit 68 by the above-described signal.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an automatic paper feeder for selectively feeding desired paper from among a plurality of types of paper set.

<Prior art> Conventionally, paper feeding devices in copying machines, etc. have either a cassette system in which a cassette containing a large number of sheets of paper is attached to a paper feeding section and the paper in the cassette is fed, or a cassette system in which a large number of sheets of paper are fed on a paper feeding table. Automatic paper feeding systems, such as a set of trays, are widely used, and the paper sheets placed thereon are fed 91 sheets at a time using a separating means or the like.

If a copying machine is equipped with two or more paper feeding devices of this type in the paper feeding section and configured to selectively feed paper of two or more sizes, it is possible to load multiple frequently used papers. By doing so, it is possible to replace the desired paper cassette, etc., thereby omitting troublesome operations.

In other words, with a cassette-type paper feed device, if you set a cassette that accommodates A4 and B4 size paper in the paper feed section of the copying machine, you can select the desired size of paper from among them. The paper will be fed automatically. In a copying machine equipped with a paper feed mechanism that can load paper of several sizes in this way, the paper is automatically loaded by selecting the paper of the desired size set as soon as the cassette is replaced. It is paper fed and very convenient.

However, even if paper of a frequently used size is set, there are often cases where it is desired to use not only the set paper but also paper of other sizes. In such a case, it is necessary to replace the cassette by, for example, removing one cassette installed in the upper or lower tier and setting the cassette containing the paper you want to use in this area. At the time of this exchange, if the previously selected cassette side is replaced, even if the print switch is operated, the replaced desired paper will be automatically fed, and the copy size error will not occur. However, when replacing a cassette, the previously selected cassette is not necessarily replaced, and the user may misunderstand that the replacement cassette is the one that has been selected. I often forget to select the item.

As a result, paper of the replaced size is not fed, and undesired paper is automatically fed from the previously installed cassette, often resulting in copying errors.

Even if paper is fed that is larger in size than the desired paper, all the necessary images can be copied, and the copy can be used as is, although it is a waste of paper. However, if the other cassette contains paper smaller than the replaced paper size, only a portion of the necessary image can be copied and the copy is completed. Therefore, after selecting the cassette, the user has to operate the print switch and start the copying process again, which is a huge waste of time and paper.

Therefore, the present applicant proposed an automatic paper feeder that simplifies the above-mentioned operation and eliminates the occurrence of duplication in Japanese Patent Application No. 57-63261.
r automatic paper feeder" (hereinafter referred to as "prior art"). This conventional technology is configured to selectively operate the paper feed roller on the replaced side when replacing the cassette or paper, and the paper (in the cassette) on the replaced side is automatically fed. . Therefore, when you replace the cassette or paper, the paper feed roller on the replacement side is automatically selected, and the replaced paper of the desired size is automatically fed without any selection operation. Become. Here, the user replaces the cassette etc. because the desired cassette is not set in the copying machine, etc., and wants to use the paper in the replaced cassette, so he selects the replacement paper. The ability to automatically feed paper without the need for paper feeding makes it a very useful paper feeding device.

Further, in the above-mentioned conventional technology, when a cassette is pulled out, the other cassette side is automatically selected, and other paper sizes etc. installed are displayed. In this case, the lower row is also displayed on the selected side. If the configuration is such that when one cassette is pulled out, the other cassette side is displayed, the display will be displayed even if no cassette is installed in the other paper source side, and the print switch will be operated based on this display. This results in an operational error. Furthermore, it is not preferable to keep the display section driven in terms of durability and energy saving. Therefore, when the applicant pulls out the cassette, only when the cassette is attached to the other paper feed section,
In consideration of selective display, a patent application filed in 1973
7-99911 Jllll dynamic paper feeder.

However, in the above-mentioned conventional automatic paper feeder, when the dual-power set is attached and the selected cassette is pulled out during the copying operation of the copying machine, the other cassette side is selected. Instead, the copying operation continues with the paper being changed midway through. Therefore,
This may also lead to miscopying. Furthermore, if the cassette on the unselected side is pulled out and reinstalled, that installed side will be selected and undesired sheets will be fed.

<Object of the Invention> The first object of the present invention is to eliminate copy mistakes. That is, an object of the present invention is to always feed only the paper desired by the user.

<Embodiment> FIG. 1 is a perspective view showing the appearance of a copying machine equipped with an automatic paper feeder according to the present invention. In the figure, 1 is a power switch, 2 is a document cover that covers a document table made of a transparent glass plate on which a document is placed, 3 is an operation section of the copier, 4 is a print switch, and 5 is a A paper accommodating cassette 6 is attached to the paper feeding section of the lower tier, and 7 is a paper ejection tray for receiving the paper after copying is completed.

The operation section 3 includes a guide whose details are shown in FIG. 2, a numeric key 31 for setting the number of copies, an erase key 32 for erasing the contents such as the number of copies, and a slot key for making another copy in the middle of continuous copying. The paper selection key 33 includes a paper selection key 34 for selecting each of the installed cassettes 5 and 6, and the like.

Reference numeral 35 is a display device that displays the set number of copies; 36 is a display lamp that indicates the operation of the interrupt key 33;
Reference numeral 7 indicates a display lamp that is linked to the paper selection key 34 and indicates which of the cassettes 5 and 6 installed in the upper or lower row is being selected, and 38 indicates a size display section that displays the paper size in the selected cassette. It is. In other words, when the paper selection key 34 is pressed once, the lower cassette 6 which has been selected up to now indicates that the upper cassette 5 has been selected as shown in FIG. 3(a). At this time, if A4 size paper is stored in the cassette 5 in the upper paper feed section, the A4 lamp in the size display section 38 lights up. - If the paper selection key 34 is pressed again in this state, the lower paper feed section is selected and the indicator lamp 37b indicating the lower stage is lit as shown in FIG. 3(b). If the paper stored in the lower cassette 6 is A3 size, the A3 size display section 38
The lamp lights up.

The installed cassette is selected in the manner described above.

In Fig. 2, the reference numeral 39 is an indicator lamp for performing various manual operations.It is used when paper is jammed in the conveyance path, when there is no paper in the cassette, or when maintenance is required. etc., the lamp will be activated and this will be notified.

FIG. 4 is a perspective view showing the structure of upper and lower paper feed sections according to the present invention. Paper feed rollers 9 and 10 are provided in the upper and lower paper feed portions, respectively, facing the mounting position of the cassette 5.6. 10 is rotated once to feed one sheet of paper in the cassette to a conveyance roller in the main body of the copying machine. The one-rotation mechanism is selectively driven by selective energization of a solenoid or the like to rotate the corresponding paper feed roller 9 or 10 once.

Furthermore, four detection switches 11 and 12 are respectively provided on the front surface of the cassette mounting section to detect the size of the mounted cassette. The detection holes 11 and 12 are pressed by projections corresponding to the sinuses provided on the cassette side, and the state of these projections detects the cassette size, that is, the menstrual size. Detected here Nui Nochi 1
1-+, 12-+ C. If used to detect whether or not a cassette is installed, eight types of cassette sizes (paper sizes) can be detected by combining the remaining three switches. Furthermore, in order to detect the presence or absence of paper in the installed cassette 5 or 6, a light receiving element 113 is placed between the cassettes and facing the light emitting lamps 13 and 14 when the cassettes are installed.
, 11.4 are provided. And cassette I-5.
On the 6 side, a window is provided for detecting that light from the light emitting lamps 13 and 14 reaches the light receiving elements 113 and 114 when there is no paper in the cassette. The light receiving element 113.1
14 receives light, that is, detects that there is no paper, the tick indicator lamp 39 indicating paper is lit to notify the user that there is no paper. If there is no paper left, the lamp will light up.However, if there is paper in the selected cassette, the lamp will stay on even if there is no paper in the non-selected cassette.

According to the paper feeding device configured as described above, A4 paper is stored in the upper and lower stages.
, If the cassettes 5 and 6 containing A3 size paper are installed, the user operates the paper selection key 34, confirms that the lamp for the desired size paper is lit, and presses the print switch 4. do. As a result, the paper feed roller 9 or 10 on the selected size side is driven one rotation, and copying can be performed on paper of the desired size. for example,
When copying on size A paper, press the paper selection key 34.
If you operate the printer, look at the size display section 38, confirm that the A and size lamps are lit, and then operate the print switch 4, no copying errors will occur. In this case, if you know that the cassette 5 of size A is installed in the upper row, operate the paper selection key 34, confirm that the selection lamp 37a indicating the upper row is lit, and then operate the print switch 4. You may. If the paper in the cassette runs out by operating the print switch 4 and copying in this manner, the "paper out" lamp lights up to notify the user that paper needs to be replenished.

The present invention not only automatically feeds paper of a desired size through the selection operation described above, but also automatically feeds paper in the cassette on the replacement side without any selection operation when replacing the cassette (paper) that you want to use. It also has a configuration that automatically feeds paper. If you want to use B4 size paper, pull out the upper cassette 5 and install the cassette containing B and size paper in the upper part. Even if the lower part was previously selected, the The upper paper feed roller 9 is selected. Furthermore, even if the upper row is selected, the upper row is still selected. By replacing the cassette, the lamp 37a indicating that "2-tier" has been selected lights up as shown in FIG. 3(C), and the size display section 3
The lamp indicating B4 size of 8 lights up.

Furthermore, in the present invention, when one of the sumo wrestlers is pulled out,
This is to selectively display the other paper feeding units. In other words, as shown in FIG. 1, A4. If a cassette 5.6 containing A3 size paper is installed in the device, and the upper A4 size cassette is pulled out when the 2nd tier is selected, the lower cassette will be removed as shown in Figure 3(b). Select and display the cassette side. At this time, if no cassette is installed in the lower tier, the indicator lamp 37b (or 37
Do not turn on a). If you pull out the cassette (paper) in this way and select the other loaded cassette (paper) side, if you pull out the paper (cassette) on the side that is being selectively fed during copying, the cassette on the undesired side will be removed. is selected and the paper is fed. In order to prevent this, the present invention prohibits selection of another cassette when a cassette is pulled out during a copying operation.

FIG. 5 shows a circuit configuration for realizing the above-described operation. In the figure, reference numerals 11-1 and 12-1 are detection switches described in FIG. 4 that detect the cassettes 5 and 6 mounted on the upper and lower stages. The detection switches 11-+ and 12-+ are each grounded via a resistor, and the other is supplied with a power supply VD. The output of each resistor (voltage generated across the resistor) is supplied to one input terminal of AND gates 48 and 49. The output of this Antogame 1-48, 49 is Impark 51
．． 52 and a set terminal S of a flip-flop 55 composed of two Nant gates via differentiating circuits 53 and 54.
and reset terminal RK are connected to each other.

Also, the -reporter connection section is connected to one input terminal of the Noah game) 58.59 via a differentiating circuit 56.57. The output signal from the inverter 51.52 is supplied to the other input terminals of the above-mentioned NOAR game) 58 and 59. The output of Noah game 1-58.59 is inverter 60.61
The signal is supplied to the reset terminal R and the set terminal S of the flip-flop 55 through the above.

The set and reset 1 outputs Q and Q of the flip-flop 55 are applied to each input terminal of an antgame 62 and 63. The other input terminal of the AND gates 62 and 63 is connected to a detection switch 11. which detects whether an upper or lower cassette is attached. -1+ 1.2.

Bittern detection signals U and D are added, respectively.

The output of this game) 62 and 63 is the switching circuit 64
in the operating section 3 via the lower display lamp 37a.
, 37b.

Still, the cent and reset 1 outputs Q and Q of the flip-flop 55 are supplied to the input terminals of the ant game L65 and 66 via the ant game 1-62 and 63. A paper feed signal is supplied to other input terminals of the computer game 65 and 66 from a copy control circuit 67 of the copying machine main body in order to feed paper. Therefore, and gates 65, 66
The paper feed signal is supplied to the next stage switching circuit 68 via the paper feed roller 11 or 1.
Solenoid 110°1 used to drive 2 one rotation
Drive 20. Here, the solenoids 110 and 120 rotationally drive the upper and lower paper feed rollers 11 and 12, and when a paper feed signal is output from the handle 165, the solenoid 110 is driven via the switching circuit 68.

In the above circuit configuration, when the flip-flop 55 is set, the upper paper feed section (the paper feed roller 9) is selected, and when it is reset, the lower paper feed section (the paper feed roller 10) is selected. selected. When the detection switch 11-1 detects a cassette and turns ON, a trigger signal (differential signal) is generated from the differentiating circuit 53 to set the flip-flop 55 in order to select the installed cassette.
is output. Then, when the detection switch 12-1 is turned on, a differential output is derived from the differentiating circuit 54, and the flip-flop 55 is reset.

Further, the Noah gates 58 and 59 detect that the cassette 5 or 6 has been pulled out, and automatically select the cassette side that is not pulled out.

In the above-mentioned case, when the cassette 5 or 6 is pulled out, it selects the other attached sumo wrestler two side, but this support is addressed only when the ant game 1-48, 49 is opened. A signal 46 indicating that a copying operation is in progress is supplied via an inverter 47 to other input terminals of the computer game 48 and 49. Therefore, if copying is in progress, gate 4
8.49 does not open and only the desired cassette side is selected and this state does not change, regardless of whether the cassette is inserted or removed. For example, even if a selected upper cassette and another lower cassette are pulled out and reinserted, the installed cassette will not be selected.

The above is the circuit configuration for automatically selecting a cassette by replacing the cassette according to the present invention.

When the paper selection key 34 is operated, the circuit for selecting the installed cassette is connected to one side of the paper selection key 34 which is grounded and the other to which the power supply VD is supplied. Te noa game) 71
．． ．． 72, respectively. The other input terminal of the AND gate 50 has a copy excitation signal 46.
is supplied. The other input terminals of the (Noa game) 71 and 72 are supplied with the reset output and the set output Q of the flip-flop, respectively. And Noah Gate 71.
The output of 72 is input to the reset terminal R and set terminal S of the flip-flop 55 via inverters 73 and 74, respectively. In other words, when the paper selection key 34 is pressed (ON) when the copying machine is not operating, if the upper cassette has been selected, a reset signal is output from the Noah gate 71, and by resetting the flip-flop 55, the lower cassette is cassette is selected.

Incidentally, the inverters 60, 61 and 73, 74 are inverters with open collectors, and supply only the "L" signal to the set of the flip-flop 55 and the recess/node terminal, and cut off the "H" signal. Although not shown in the circuit of Fig. 5, the configuration for displaying the size of the cassette installed on the selected side uses the detection signal from the cassette size detection unit Sochi 11.12 shown in Fig. 4. Based on this, the corresponding lamp on the size display section 38 may be lit. For example, if the upper stage is selected, the detection signal of the lower stage detection switch]2 is ignored, and the upper stage detection switch 11 is ignored.
The spider size signal drives the corresponding size lamp.

In order to understand the present invention, the operation of the circuit configured as described above will be explained in order.

Now, in a state where no cassette is installed in the non-operating paper feeding section of the copying machine, the cassette 5 containing the A4 size paper to be used, for example, is installed in the upper sheet feeding section.

With this attachment, the detection switch 11-1 is turned ON, the output of the inverter 51 is inverted from "H" to "L", and a differential signal is output from the differentiating circuit 53. This allows free
A differential signal is supplied to the second terminal S of the flip-flop 55, the flip-flop 55 is set, and its output Q becomes "
HII Totoru. This set output Q is the AND gate 62
has been added to. When the detection switch 11-1 is turned on, the signal U(
``H'') is input, and the AND gate 62 is in an operating state. Therefore, the lamp 37a indicating that the upper stage has been selected is driven by the set output Q ('"H°゛) via the switching circuit 62. Detection switch 1
The detection signal of 1 becomes valid, and as shown in FIG.
, the lamp indicating the 4 sizes lights up. Furthermore, in this state, the set output Q of the flip-flop 55 puts the AND gate 65 into operation via the AND gate 62, and the solenoid 110 for selectively driving the two-stage paper feed roller 9 becomes operable. Become. Then, when the user operates the print switch 4, the copying operation is started, and the copying control circuit 67 outputs a paper feed signal in synchronization with the rotation of the photoreceptor and the like. By this paper feed signal, Antogame 1/65
opens, the solenoid 110 is driven, and the paper feed roller 9 is driven one rotation, and A4 size paper is fed from the cassette 5 installed in two stages. This operation is
This process is repeated every time the paper feed signal is output.

Next, a case will be described in which, while the copying machine is not operating, an A4 size cassette 5 is installed in the upper stage, an A3 size cassette 6 is installed in the lower stage, and copies are made on A3 size paper. When the cassette 6 is installed, the lower detection switch 12+ is turned on, and the output of the inverter 52 becomes It.
Inverted from Hll to “L”. Therefore, the differentiating circuit 54
The differential signal is input to the reset terminal R of the flip-flop 55 via the differential signal, and the flip-flop 55id is reset. Therefore, the AND gate 62 is closed by the "H" level that enables the reset output of the flip-flop 55.
3 is opened and the lamp 37b indicating that the lower tier has been selected lights up, and in response to the size signal from the lower tier size detection switch 12, the lamp indicating A3 size lights up as shown in FIG. 3(b). At this time, the AND gate 66 for selecting the lower paper feed roller 10 is not in operation, and if a paper feed signal is output from the copy control circuit 67 after the print switch 4 is operated, this signal is sent to the switching circuit. Solenoid 120 is driven via 68.

As mentioned above, if the lower cassette 6 is currently selected in a state where the lower cassettes 5 and 6 containing A4 and A3 size paper are respectively installed, the third cassette 6 is selected.
The display shown in Figure (b) is made, and the lower paper feed roller 10 is driven one rotation by the output of the paper feed signal. When the user desires to make a copy of A4 size paper, by operating the paper selection key 34 once, the upper cassette 5 containing A and size paper is selected. That is, when the contact of the paper selection key 34 is turned ON, a differential signal ("L") from the differentiating circuit 69 is supplied to each NOR gate 71, 72.The other of the NOR gates 72 indicates that the lower cassette is selected. Therefore, since the flip-flop 55 is set and the "L" signal of the set output Q is input, the NOAR game 1-72 outputs an "H" signal. Therefore, the output of the inverter 74 with an open collector becomes "L", and the flip-flop 55 is set, and the third
The display as shown in Figure (a) is displayed and switched, and the upper cassette 5 is selected. If this paper selection key 34 is operated again, the cassette that was selected in the upper row will be changed to the cassette in the lower row.

Next, a case in which a cassette is replaced according to the present invention will be described. Here, as explained above, the explanation will be made assuming that A size cassettes 1-5 are set in the upper row and A3 size cassettes 6 are set in the lower row. It is also assumed that the lower cassette side is currently selected. Therefore, when it is desired to make a copy of size B, it becomes necessary to replace the cassette containing the paper in the upper or lower paper feed section. At this time,
When you pull out the A4 size cassette in the upper row, you will see the differential circuit 5.
When the input side of 6 falls from H" to L", the differentiating circuit 56 outputs the differential signal ("L'") at that time to the NOR gate 5.
8.

Since the other input terminal of the NOR gate 58 is supplied with the "L" signal of the inverter 52, both input terminals are "L +1", and the output of the NOR gate 58 is "H".
Therefore, the output of the inverter 60 goes low, and the flip-flop 55 is reset. However, in this case, the flip-flop 55 is in a reset state and only remains in that state.

As described above, when the two cassettes are pulled out and a desired B size cassette is set in the upper tier, the detection switch 11-1 is turned on. As a result, inverter 5
1 is inverted to "L", the differential signal from the differential circuit 53 at that time is applied to the set terminal of the flip-flop 55, and the flip-flop 55 is set. Therefore,
The replaced upper cassette is automatically selected, eliminating the need to operate the paper selection key 34.

On the other hand, if the lower side to be replaced is selected,
In other words, when the flip-flop 55 is reset and you want to replace the lower A3 size cassette with a B4 size cassette, if you remove the A3 size cassette,
The input side of the differentiating circuit 57 falls from "H" to "L". At this time, the differential signal "L" is applied to the NOR gate 59, and the other input terminal of the NOR gate 59 receives the "L" signal from the upper stage inverter 51. Since the signal is being supplied, the output of the NOR gate 59 becomes "H". This causes the output of the inverter 61 to become "L", setting the flip-flop 55 and selecting the upper cassette. In this case,
The display also switches to the upper row.

Then, if a cassette of size B is installed in the lower stage, the output of the inverter 52, 63 II HII to “L 11
and is inverted to the flip-flop 55 via the differentiating circuit 54.
will be reset and the replaced lower cassette will be automatically selected. If you replace the cassette/gutter with one containing the desired size of paper as described above, the replaced cassette will always be selected no matter how orange the upper or lower selection is. Become.

If you pull out any of the cassettes 5 and 6 installed in the lower paper feed section as shown in ``2'' below, the cassettes installed in the other paper feed section will be displayed. Now, if you pull out the upper and lower cassettes in order, the detection switch 11-1+12
62.63 is closed and the indicator lamp 37a or 37b is not lit. In other words, if a cassette is pulled out and no cassette is installed in another paper feeding section, the lamp 37 for displaying the selection in the upper row will not be driven, indicating that there is no installed cassette.

The above has explained the selection operation based on insertion and removal of a cassette when the copying machine is not in operation.Next, the operation when the copying machine is in operation will be explained. In other words, when the copying machine is operating, the signal 46 is supplied to each AND gate 48, 49.50 via the inverter 47, so the AND gate 48°49.50 has a closed trench, and its output is It does not change in the "L" state. Therefore, even if the cassette is inserted or removed, the set or reset state of the flip-flop 55 does not change, and the paper feed section selected at the start of the copying operation remains selected. However, if the selected cassette is removed, the lamp 37a or 37b indicating the selection will go out. Here, if you want the lamp 37a or 37b on the selection side to light up even if the cassette is removed, use the AND gate 62. Without establishing '63,
The output of the flip-flop 55 may be directly input to the switching circuit 6. Further, as a signal indicating that a copying operation is in progress, a drive signal of a main motor, which is a drive source within the copying machine, or the like may be used. This main motor etc. is conveniently driven to rotate from when the print switch is turned on until the copying to the final sheet is completed. However, the present invention is not limited to using a drive signal for a main motor or the like as a signal during a copying operation, but may use a signal outputted by a copying machine during operation.

<Effects of the Invention> According to the automatic paper feeder of the present invention, the cassette (or paper)
In the case where several types of paper are installed and the desired size paper is selected and fed from among them, when the cassette (or paper) is replaced, the replacement paper feeding means is automatically selected. It is a paper feeding device with extremely high utility value, as the replaced paper is always selectively fed without the need for tedious paper selection operations, which eliminates copying errors and other wasted time and paper. In addition, the present invention maintains the paper feed side selected at the start of operation even if the set paper is taken out or set while the copying machine is operating. This makes it possible to prevent misfeeding of paper due to pulling out or setting paper during copying operations.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the external appearance of a copying machine equipped with an automatic paper feeder according to the present invention, FIG. 2 is a plan view showing details of the operating section according to the present invention, and FIGS. 3(a) and (b) (c) is a diagram showing an example of the display state of the display unit of the operation unit of the present invention;
The figure is a partially cutaway perspective view showing the structure of a paper feed section into which various cassettes according to the present invention are installed, and FIG. 5 is a circuit showing a specific example of the control circuit configuration for realizing the automatic paper feed device of the present invention. It is a diagram. 3: Operation unit, 34: Paper selection key, 37: 2 lower selection display lamps, 38: Size display unit, 4 Ni print switch, 5, 6: Paper storage cassette, 9, 10:
J2 lower paper feed roller, 11°12: Cassette size detection switch, 1.1-,. 12,: Cassette detection switch, 1.3, 113/14
．． 114: Paper presence/absence detector, 46: Copying operation signal,
47: Inverk, 48, 49.50 = AND gate, 55: Flip-flop for upper and lower stage selection, 62, 6
3: AND gate, 64: Switching circuit for driving upper and lower stage selection lamps, 67: Copy control circuit, 68: Switching circuit for driving paper feed roller selection, 110, 120:
Solenoid for driving the paper feed roller. Representative Patent Attorney Aihiko Fukushi (and 2 others) Figure 2 Figure 3 Figure Chiku 4

Claims (1)

[Claims] l. A plurality of types of paper are set in the main body of the apparatus, and a selection means is used to selectively operate the paper feeding means provided opposite to the set paper, to automatically feed the set desired paper. In the apparatus, when the paper is set, a drive control means for selectively operating the paper feeding means on the set side; An automatic paper feeder comprising means for prohibiting the operation of the drive control means and selection control means when the apparatus is in operation, and maintaining the selected paper feeder at the start of the operation of the apparatus.