DE2405662A1 - CONTROL DEVICE FOR COPY DEVICES - Google Patents

Description

PATENT ADVERTISERS HENKEL — KERN - FEILER - HÄNZEL — MÜLLER

DR. PHIL. DIPL.-ING. DR. RER. NAT. DIPL.-ING. DIPL.-ING. Ii ι ι χ-. 05 29 »02 η ν κ L D EDUAR D - S C H MID - STRASSE 2 Bavarian mortgage and

TI-. 1.1 FON: (08 II) 66 31 97. 66 30 91-92 gnoil UiHIfUBM WECHSELBANK MUNICH NO. 318-85 IU

Il I.I CiRAMML: KILIPSOID MUNICH U-öUOU MUNICH VO POSTSCHECK: MCHN 162147 -

Konishiroku Photo Industry Co », Ltd. "&. FEB. 1974

Tokyo, Japan 2405662

Control device for copiers

The invention "relates to a control device for copiers.

Used to operate electrophotographic copiers Operating materials such as transfer papers and developer powder as well as parts that have to be added or renewed after a certain number of copying processes. Included it is customary to turn off the copier automatically after a certain number of work cycles in order to to be able to carry out the addition or the exchange without disadvantages for the device or the quality of the copies. However, this setting down of the copier is inconvenient and very annoying when urgent copying work is in progress. leads need to be.

Since a specialist is usually required to renew the developer powder, the copier must also be switched off remain until the specialist is available to maintain the device. On the other hand, the developing powder is inevitable is gradually used up, the copier should still be operational even if it is already has performed a predetermined number of operating cycles.

Mü / Bl / Ro - 2

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The invention is therefore based on the object that the known To eliminate the inconveniences and disadvantages inherent in copying machines and in particular a copier too create, which enables a reliable supply of resources and a trouble-free implementation of the Copying work is still guaranteed if, for example, the supply of developer powder has dropped so far, that a renewal should be made.

This task is performed in a control device for a copier solved according to the invention by a device for generating a signal by which the copier is turned off a device for displaying the state that the copier is to be turned off, a switching device, which switches from one contact to another at a time when the copier reaches a predetermined value Number of work cycles has performed, a capacitor that is switched over to the other contact by the switching device is charged, electromagnetic devices excited by the charging of the capacitor and an in a network of the capacitor and the electromagnetic devices switched on second switching device, wherein the device generating the shut-off signal can be actuated by the electromagnetic devices.

In the following, preferred embodiments of the invention are explained in more detail with reference to the accompanying drawings. Show it:

Fig. 1 shows an electrical circuit diagram of a device with Features of the invention and

Fig. 2 is a circuit diagram of a modified embodiment the invention.

409833/0961

The one in Pig. 1 shown device, in which'a DC voltage E is applied to terminals A and B, has a main switch MS and a microswitch MS ₁ , which is operated by a copy counter provided in the copier when this has reached a predetermined number, at which a Supply of resources or replacement of parts with a short service life is required. The apparatus further comprises Eelais RL ₁ and R · «* ^e i ^ne via the microswitch MS to voltage superimposable indicating lamp PL, a resistor R, an electrolytic capacitor C, diodes D ₁ and Dp in parallel to the relay RL ₁ and Rl are connected in _2, a "terminal C to which a signal is generated to stop the copying machine, a normally-open closable by the relay RIj ₁ switch S ₁ and a normally-open closable by the relay RL" switch S _2.

The device described above works as follows:

For example, the number of copies can be displayed by a counter that has a known switching wheel mechanism in the Pail of resources or short-lived parts that have to be supplemented or replaced after every 5000 work cycles. _{The microswitch MS 1} remains in accordance with Pig up to a number of copies of 5000. 1 connected to the contact D, while the capacitor C _{1 is} charged to the voltage Έ. In addition, the relays RL ₁ and RL ₂ remain inactive. Pole-wise, no output signal appears on terminal C, so that the short-lived parts do not need to be replaced and the equipment does not need to be added.

When a copy number of 5000 is reached, a cam that is known per se and that rotates with the ratchet mechanism of the counter switches the microswitch MS ₁ from contact D to

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Contact P um, whereby the indicator lamp PL lights up to provide a visual display and then the relay RL- is energized The energized relay RL ₁ closes the switch S ₁ , whereby the capacitor G _{1 can} discharge and the relay RL _{2 is} energized, which in turn closes the switch Sp. The relay RLp is latching, so that an output signal appears at terminal G, which the copier switches off for the addition or replacement after 5000 copying processes.

After the addition or replacement, the microswitch is reset by a known mechanism, whereupon the Copier can continue to work for the next 5000 work cycles.

If, on the other hand, the operator continues to work without adding or replacing equipment or short-lived parts wants to work, she can use the copier, which has reached 5000 copying cycles and on which the indicator lamp PL lights up, keep it in operation by opening and closing the main switch MS.

When the main switch MS is opened, the relays RL ₁ drop out, whereby the contacts S ₁ , Sp are opened · The microswitch MS ₁ remains at contact 3 ?. The main switch MS is then closed next. As a result of this closing, the indicator lamp PL lights up, from which the operator can determine the course of 5000 work cycles, and the switch remains closed _{via the relay RL 1.} In this state the relay RLp is not energized because the capacitor O ₁ does not contain any charge. As a result, the switch S ₂ remains open and there is no shutdown signal.

In the illustrated embodiment, a relay is used for

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Operation of the switch Sp is used, but another electromagnetic device can be used instead of the relay. An example of this is an electromagnetic device with a reset button, which can be displaced by magnetic force, for closing the switch S ₂ and for opening it manually.

In a control device having such an electromagnetic device, an operator needs to continue of the copying work with no supplement or a replacement just press the reset button.

The modified embodiment of the invention according to FIG. 2 is explained below.

In addition to the microswitch MS _1, a second microswitch MS _? intended. The micro-switch MS ₁ switches after expiry of the first predetermined number of operating cycles, for example, 5000 cycles, while the microswitch switches MSp 10000 cycles after a second predetermined number of, for example, _e. After counting 5000 copies, the microswitch MS _{1 is switched} from contact D to contact F, while microswitch MSp remains on contact G

There is an indication of the need to replace short-lived parts or to add equipment in the same way as in the device according to FIG. 1 by an indicator lamp PL. When the number of copies is 10000 is reached, the microswitch MSp is set by another provided in the copier and by the switching wheel— mechanism set in rotation cam switched to contact H «

When the need for an addition or a replacement

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is indicated by the indicator lamp PL, the copier is stopped in the same manner as in the first embodiment. The copier cannot do this
only continue to work after the necessary supplementation of the equipment or the replacement of the short-lived parts during the next 10,000 copy cycles, but can also continue to operate without this maintenance work by actuating the main switch MS or the aforementioned reset button.

409833/0961

Claims (1)

Claims Control device for a copier, geke η η is characterized by a device for generating a signal by which the copier is turned off, a device (PL) for displaying the status that the copier is to be turned off, a switching device (MS ₁ ), which to switches from one contact to another at a point in time when the copier has performed a predetermined number of operating cycles, a capacitor (C ₁ ) which is charged by the switching device switched to the other contact, electromagnetic devices (RL ₂ ) and a second switching device (S ₁ ) connected to a network comprising the capacitor and the electromagnetic devices, wherein the device generating the shut-off signal can be actuated by the electromagnetic devices. Device according to Claim 1, characterized in that the first switching device has a plurality of switches (MS ₁ , MSp), each of which switches over at times when the copier has carried out different, predetermined numbers of work cycles. 409833/0961 Lee rs e i t e