DE1953768B2 - CONTROL FOR A COPY MACHINE - Google Patents

Description

On the known electrically controlled copiers it has been shown to be disadvantageous that if the power switch is opened by mistake, all devices of the The device must be stopped immediately and the ongoing copying process will not be terminated The present invention is therefore based on the object to provide a copier that the The copying process comes to an end even if the main switch is open during the copying process will. This object is achieved with the means specified in claim 1

The hold switch is controlled by a relay that is in series with one controlled by the timer Switch is arranged. The predeterminable time delay is set by a Rule winder position arranged in the timepiece.

With the control according to the invention ei.i copier is created, which the termination of a ensures every copying process, even if the main switch accidentally occurs in the middle of the copying process of an original is opened. As a result, on the one hand, the copy is still completed and, on the other hand, the The risk of the copy paper getting stuck in the copier completely eliminated, so that no Malfunctions caused by copy paper remaining in the device during the next copying process will.

An embodiment of the invention is shown in the drawings and is based on these described. It shows

F i g. 1 a circuit diagram for the principle of the control according to the invention,

F i g. 2 shows an embodiment of a controller according to the invention.

Referring to the circuit diagram of FIG. 1, which shows the To illustrate the principle of a copier according to the present invention, reference number 1 shows a electrical power source, 2 a main switch, 3 a hold switch, which is normally activated by

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opening with the relay 4 and connected in parallel to the main switch 2 is 5 a timer, 6 a Operating switch and 7 the entirety of the loading device. The timer 5 is connected to the power source 1 connected via the timer switch 8, which is operatively connected to the main switch 2 Das Relay 4 is driven by the power source 1 via the relay switch 9, which is controlled by the timer 5 can be operated.

The devices causing the load on the electrical circuit that are globally part of part 7 are summarized, consist of various mechanical and electrical parts of the copier, such as a copy paper feeder of the Copier, a motor that drives a fan, a heater for drying a developed copy paper, a magnetic coupling between Feeder and its drive device, a light source for scanning an original, etc. In the circuit diagram the F i g. 1, it is possible to relieve the aforementioned stress inducing parts of the copier classify, namely into a first group, which consists of those parts that operated continuously and into a second group that operate intermittently to parallel the second group the; n series connected relay 4 and the Relay switch 9 to be arranged.

To start up, the main power switch 2 is closed by hand and opens the at the same time Timer switch 8 connected in series with timer 5 At the same time, the copier started for copying. After placing an original to be copied into the insertion opening of the Copier the operating switch 6 is closed by hand. At this moment the relay 4 is energized and the hold switch 3 is also closed. By closing the operating switch, the remaining parts, e.g. the intermittent parts of the copier operated and the copying process begins to run.

If the main switch 2 is accidentally opened during the copying process, the hold switch 3 remains closed thanks to the action of the relay 4, while the timer switch 8 is closed by its connection to the main switch 2 and the Timer 5 operated. After a predetermined time delay, the timer 5 opens its Contact or the relay switch 9 to de-energize the relay 4. This opens the relay contact or the hold switch 3 and the power supply for the entire copier is interrupted and the The copier is switched off.

By setting the time delay of the timer 5 according to the time it takes to complete Copying an original is required, the copying process of any original that is currently being copying is completed despite an accidental opening of the main switch 2 in the middle of the copying process. This avoids wasting copy paper and clogging the Copier eliminated as a result of the paper remaining in it after the previous copying process.

Furthermore, the overlapping of the copy paper due to the remaining copy paper from the previous copying process can also be avoided.

The operating switch 6 does not have to be manually operated, but can also be an automatic

ger switch, which one ζ. Β. automatically when inserted of the original is closed in the copier.

Fig.2 shows the circuit diagram of the copier of present invention in practice, in the parts that correspond to those in the basic circuit diagram F i g. 1 correspond to the same reference numbers. In this example relay 4 consists from the latching relay 4 'and a releasing relay 4 ", while the timer 5 from a capacitor 10, the resistors 11 and the transistors 12 ίο is composed of the time delay of the timer is determined by the charging process of the capacitor 10. The capacitor is fed via the transformer 13 and the rectifier 14.

The operating switch 6 of this embodiment either switches over automatically or opens automatically when removing the manual locking force. The latching relay 4 'and the releasing relay 4 "therefore form one Holding circuit (not shown) to the operating switch 6-

One of the resistors 11 of the timer 5 is variable, so that the time delay by control of the variable resistance of the resistor 11 is adjustable

When the present embodiment is put into operation, when the main switch 2 is closed, a relay 15 is actuated and closes the associated contacts 16, whereby the load devices 7 are connected. Simultaneously with the closing of the switch 2, a switch contact 8 of the timer 5 is rotated from the position b to the position a in order to discharge the remaining electrical charge of the capacitor 10. Then, by manual actuation of the operating switch 6, the latching relay 4 ′ is excited in order to close a holding switch 3 which is connected in parallel with the main switch 2

When the main switch 2 is accidentally opened in the middle during the copying operation, the Zeitmeßschalter 8 is pivoted b simultaneously from the position a to position So charging starts of the capacitor 10. When the voltage at a junction P between the capacitor 10 and resistor 11 reaches a predetermined level , the transistors 12 become conductive in order to excite the release relay 4 "to open the hold switch 3. In this way the entire copier comes to a halt -Relay 4 "the series connection of relay 4 and the relay switch 9 of the circle of FIG. 1 closes and interrupts.

According to the present innovation, the operation of the copier is not at the moment in which the Main switch 2 is opened, interrupted, but instead carries out the copying process in progress Originals still to come to an end. This can cause loss of copy paper and adverse effects for the following copying operation.

If the main switch 2 is closed and then immediately opened again without the operating switch 6 was actuated, the copier starts up and stops immediately because the hold switch 3 remains open In other words, as long as switch 6 was not closed, the opens Switch 2 switches off the copier immediately. Hence, senseless energy consumption can result Avoid operating the copier under such conditions.

1 sheet of drawings

Claims (3)

Claims: 19 1. Control for a copier, characterized by a main switch (2), a s independent operating switch (6), a parallel to the main switch (2) arranged hold switch (3), which is controlled by a relay (4, 4 '), the after closing the main switch (2) and the operating switch (6) is energized, is closed, a timer (5), which is switched on simultaneously with the opening of the main switch (2), means (9, 4 "), the through the Closing the main switch (2) and the operating switch (6) open the closed hold switch (3) after the delay line determined by the timer (5) has expired after the main switch (2) has been opened 2. Copier according to claim 1 “characterized in that means (11) for setting the duration the delay time of the timer (5) are provided. 3. Copier according to claim 1, characterized in that the timer (5) contains an RC delay circuit (10, 11)