DE1472711C - Photocopier for making copies of variable length - Google Patents

Description

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The present invention relates to a driven and not already in front of the cut-off photocopier with a lighting window and operation under tension is a safe and secure one a copy window, where the original or the particularly fast separation of the paper web Copy paper are fed along, and not guaranteed with one each.

Transport device for the original and the 5 With the help of the pretensioned cutting device

Copy paper from a supply roll over a according to the present invention should have a smooth,

Cutting device is guided to the copy window, fast and safe cutting of the copy paper

and with a light source to illuminate the can be achieved.

Originals and · a reflection system, which the device according to the invention is characterized Beam path from the lighting to the copying window from the fact that in front of and behind the lighting controls. The photocopier also has one switch for each device window in the path of the original on, which have the effect that is arranged by the type that the distance between the the original run the device automatically in operation first switch and the beginning of the lighting set and that through the trailing edge of the original window equal to the distance between the cutting die Cutting device is controlled. 15 device and the beginning of the copy window is

There are already several such photocopier and the second switch the same distance from

get known. first has like the cutter to the end of the

In an arrangement of this type, a special copier window is such that when the paper is inserted, it is electrostatically charged and takes over the movement of the original by means of the first switch. The individual operations are triggered by the triggers and the lamp is switched on while the template is being inserted. The end of the forward passage of the trailing edge of the original first position controls a cutting device with which the switch at the same voltage off usually under tension copy corresponding to the length of the original stationary cutter, which is a fixed cut. 35 standing and one movable part by a spring

In a known control arrangement for a photo has, triggers and the further supply of copier-copier, a switch is provided which prevents the paper, while the leading edge of the leading edge or the trailing edge of the original is actuated by the second switching element the circuit and by means of a time relay the drive of the lamp is kept closed until the rear mechanism of the device controls. The switching element has passed through the relatively 30 edge of the original.
Complicated structure of this device appears. Preferably, the arrangement has a drive system with two shafts and a normally exhausted, coupled coupling between a conveyor roller that does not guarantee high operational reliability

Another copier has a micro and a first shaft and a normally on switch provided in der'Bahn der Originals, the 35 coupled coupling between a control cam controls the transport and cutting operations by and the second shaft.

it is actuated by the rear edge of the original. The device expediently applies a wave will. Because a ratchet wheel with two teeth is loose when making a copy this device must first be made a negative at the points where the cam must be, the control devices are located in accordance with 40 extensions or humps, and a helix is complicated and expensive, with which also further springs that around a coupling error sources arranged on the shaft are connected. lung drum is lying around and its ends with

In the same device, two knives are connected, each with the ratchet wheel and the cam.

a fixed and a movable part are to be used.

Separate the negative or positive copy paper. The 45 The copy paper is supposed to go to the cutter

moving knife parts are fed here directly by means of a conveyor roller,

driven by a motor so that the speed on the device according to the invention is an actuator

speed of the cutting movement is provided by the rotary speed lever, on which a switch-off

engine speed depends on. There is a secure, lever attached to it that is attached to a shock absorber block

smooth cutting of the copy paper with itself 50 can be brought into engagement with a plate,

not guaranteed because of the railway. the overall arrangement is such that the

There is also known a cutting device, the actuation of the lever in accordance with the

is operated electromagnetically. It is an interruption of the drive for the paper feed

around two fixed counter knives on which is carried out.

a moving knife sweeps past. The device is triggered. The exact point in time washer on which one end of a clutch spring des.Abtrennens is controlled via a time relay, which is provided around a clutch drum on the one that is placed between the switch and the electric roller and is provided together with this meter . The control assembly for the 60 rotates while the other end of the spring is engaged in a cutting process so that many individual openings in a clutch brake disc engage the elements :! together, whereby the possible disturbance in turn sits loosely on the clutch roller,
swell multiply. The sheet of copy material, which is

Finally, a separator roll comes in and has the length of the original known, consisting of a fixed and a movable 65 in the device according to the present invention Knife is made. The movable knife is useful for two guides to one of the rollers Longitudinal axis parallel to the cutting edge rotatably guided, which in turn connects the arch to the gap between camps. Since, however, the movable knife also feed two further rollers, which act as end rollers

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serve and the sheet through an opening onto the one exposure point 50, a development point 52

convey the top surface of the end cover. and through a fixing device 54. To the

In the part of the description that follows, the conclusion is reached that the developed copy is

Invention with reference to the drawing in the opening 56 on the surface of the cover plate 16

individual are explained in more detail; in the individual 5 and in a position in which they can be used by the user

Figures of the drawing carry the same parts the same machine is achievable.

Reference numerals. In the drawing is. If a copy is to be made, a

F i g. 1 is a view of a longitudinal section through a conveyor roller 58 coupled to a drive shaft 60,

Embodiment of a copier according to the Er- so that the paper through the angular gap

invention for making copies of variable io between roller 58 and an upper conveyor roller

Length, 62, which is carried by a shaft 64, through-

Fig. 2 is a plan view of the copier can be drawn. After going through

According to Fig. 1, the cutting point46 goes through the copy material

F i g. 3 shows a side view of the copying machine, showing the gap between the conveyor rollers 66 and 68

according to the invention after removing a side wall, 15 the shafts 70 and 72 therethrough. A pair of leading

to show the drive system of the machine to guide rollers 74 and 76 on shafts 78 and 80, respectively

can move the copy paper from the glow plate

F i g. 4 shows the view of a partial section through a formation point 48 to the exposure point 50. Das

Embodiment of the copying machine according to the copying material 38 carries in a manner known per se

Finding with the conveyor device for the transport 20 a coating of photoelectrically conductive material,

of the original, \ for example made of zinc oxide or the like

F i g. 5 is a view of a partial section through the predetermined length of the copy paper through the

Transport and cutting device, which passes through at point 48, then the copy paper is one

Copying machine according to the invention for the application of certain electrical potential between a

get 25 glow discharge wire 82 in the vicinity of a housing

Fig. 6 is a view of a section through the entire 84 and exposed to a grounded roller 36 carried by

Transport and cutting device of the new copier a lever arm 88 is held. Got the paper

machine to receive a certain electrical charge, then

F i g. 7 is a side view of the cutting and conveying device running between a guide 90 on the lever device inside the copier, 30 arm 88 and a window 92 over through which

Fig. 8 is a partial plan view of the Einrich- an image of the original to be copied in later

according to Fig. 7 from level 8-8 of FIG. 7 is thrown in the manner to be described.

see, with individual parts broken off drawn Corresponding conveyor rollers 94 and 96 sit on

are shafts 98 and 100 and convey the copy paper

j FIG. 9 is a view of a partial section through the 35 from the exposure point 50 to the development

Device according to fig. 7 from level 9-9 of point 52. The copy paper thus carries an electrical

F i g. 7 seen and static charge, and when exposing the copied

Fig. 10 shows an embodiment of a circuit diagram rendering the charge in the relative picture j for the electrical control circuit of the copier machine from lighter areas of the image and is in the according to the invention. - Maintain 40 relatively darker areas of the image. J From the F i g. 1 to 3 of the drawing can be seen, Is the copy paper through the gap between the that the embodiment of the rollers 94 and 96 shown there passed through, then it slides electrostatic copying machine 10 according to a wrapping roller 102, which is on a shaft ! of the invention a base plate 12, a rear 104 sits. If the copy paper leaves the developer plate 14, an upper end cap 16, and 45 roller 102, then it becomes usable with developer particles Has side walls 18 and 20. Inside sprays from the charged areas of the The machine is the main machine frame to be tightened with copy material and there are adhered support plates 22 and 24, which remain in themselves to form a latent image on the copy material are kept at a distance from one another in a known manner. to be able to develop. As is known per se, can

The conveyor 26 for the original is at 5 ° as a developer of powdered plastic of one color

the front of the machine 10 attached. I'm used to that contrasts with the color of the

upper part 28 of the conveyor 26 is a copy material 38 is available.

Push button 30 accommodated, the on and off after leaving the development station 52

is used to switch the machine, as well as a button 32 for running the copy material 38 through the gap between

setting the desired number of copies. 55 on rollers 106 and 108 on shafts 110 and 112

The adjustment knob 32 moves a pointer 34 into a through. These rollers move the copy material

certain position above a scale 36 and denotes the space between two guides 114 and 116,

the number of copies the machine will make the material two feed rollers 118 and 120 on

should ask. feed the shafts 122 and 124, respectively. The copier

As will be described in more detail in the following, if material 38 then passes through the space between should, when an original is conveyed through a guide 126 and a heating device, the conveying device 26 is copy material, for example 128, which has a sufficient amount of heat on the copy paper 38, from a roll 40 unwinding particles emanating on the sheet without being drawn, which is carried by a shaft 42 which nevertheless burns the sheet,
in turn, is held in bearings 44 on the walls 22 and 24 65 guide rollers 130 and 132 on the shafts 134. The copy material, which is drawn off from the and 136 guide the copy material of a curved roller 40, gradually runs through guide 138, which the leading edge of the sheet, a cutting point 46, a corona discharge point 48, up the gap between the roller 132 and

a roller 140 on a shaft 142 feeds. Now the arc between guides 144 and 146 into the angular gap between the roller 120 and a roller 148 on a shaft 150 led above. If the original has passed through the conveyor device 26, then the length of the material is 38, which comes from the roll 40, cut to the length of the original. The cut bow is fed from rollers 120 and 148 to two guides 152 and 154, which the sheet to the gap between Feed rollers 156 and 158 on two shafts 160 and 162, respectively. These end rollers 156 and 158 convey the sheet through the opening 56 onto the top surface of the end cover 16, where it is available to the user can be reached by the machine.

As one can see from FIGS. 1 and 4 clearly shows an original to be copied from the conveyor device passed by inserting it into an opening 164, from where it enters the angled gap between the conveyor rollers 166 and 168 is guided on the shafts 170 and 172, respectively. Two tours 174 and 176 direct the original from rollers 166 and 168 into the nip between rollers 178 and 180 shafts 182 and 184. Rollers 178 and 180 feed the original to an exposure window 186 and into the gap between rollers 188 and 190 on shafts 192 and 194. Once the original As the window passes the window, light from a source 196 is thrown onto its surface for a Image of the arc through opening 198 in light reflector 200 along a path shown in FIG. 4th is drawn in dashed lines to reflect.

If the leading edge of the original comes out of the gap between rollers 188 and 190, then it is picked up by a guide 202, which the original in the angular gap between the Rollers 190 and a roller 204 on a shaft 206 steers. The sheet is then transported directly to the top, as can be seen in the two figures, and is guided by two guides 208 and 210 in the Gap guided between the roller 178 and a roller 212 which is seated on a shaft 214.

The conveyor system also includes a guardrail 216, which can be moved to the position shown in FIG. 4 is shown in solid lines, as well as the position shown in dashed lines can assume. In the fully extended Position of the guide rail 216 leads the latter back the original through an opening 218 so that it is the User is returned. In the position of the guardrail, which is shown in dashed lines is, the leading edge of the original moves up past the guardrail and into the guides 220 and 222 inside, which move the original upward into an angular gap between platen 168 and a roller 224 carried by a shaft 226. If this happens, then a tour leads 228 on one of the walls of opening 164, the original back to the nip between the rollers 166 and 168 to cause the original to pass through the entire device anew. It follows that the position of the guardrail drawn in dashed lines is that which it occupies when many copies are to be made of one and the same original.

The previous description shows that the shafts 60, 64, 70, 72, 78, 80, 98, 100, 104, 122, 134,184 and 192 are held in the main frame panels 22 and 24 or on subframe panels that in turn are held by these parts. The shafts 124, 136, 142 and 150 are on a rear Door supported by a support structure 230 attached to the rear wall 14 of the Machine is articulated by means of hinge pins 232. Any component known per se, for example a releasable latch 234 on the main frame, can be connected to a pin 236 on the door 230 cooperate to hold the door in its closed position. Inwardly protruding flanges 238 carry shafts 124, 136, 142 and 150 as well as guides 126, 144 and 146.

The side walls 240 of the device 26 for the transport of the original carry the shafts 170, 172, 182,184, 192,194, 206, 214 and 226 as well as the guided tours the facility for transporting the original. The conveyor 26 is on any usual way removably attached to the machine. For example, hooks 231 on the device 26 encompass a projection 233 on the housing of the machine. Tabs 235 are used for detection of pins 237 to hold the device 26 in place.

FIGS. 1 to 3 also show that the drive mechanism for the copier machine of the invention includes an electric motor 242 which may be attached to plate 22, for example.

The motor 242, the supply of which will be explained in more detail below, drives a shaft 224, on which two sprockets 246 and 248 sit. The sprocket 246 drives a hook chain 250 that runs on the shaft 70 via a sprocket wheel 252.

In operation, the motor 242 drives the shaft 244 in a counterclockwise direction, as shown in FIG. 3 shows that Drive shaft 70 counterclockwise as well. The sprocket 248 drives a hook chain 254, which is the main drive for the machine. A bearing 256 which around a pin 258 in a plate 18 is normally biased by a spring 260 so that it is clockwise is pivoted, as shown in FIG. 3 shows. The pivotable bearing 256 carries a sprocket wheel 262 which engages chain 254 to take up the slack in the chain.

The chain 254 extends from a sprocket 262 around a wheel 264 on the shaft 266, which is of a console is held on the plate 22, and from there up to the sprockets 268 and 270, the are carried by shafts 60 and 78. The chain 254 goes from the sprocket 270 via a sprocket 272 on shaft 98 under a wheel 274 on shaft 104 and under a sprocket 276 on the Shaft 112 through and then over sprocket 278 on shaft 162. Runs from wheel 278 the chain down and engages a sprocket 280 on shaft 122 and arrives finally under a wheel 282 on shaft 134 and then back to sprocket 248.

Once the motor 242 is turned on, it drives the shafts 60, 78, 98, 162, 122, 134 and 266 in the Counterclockwise, as shown in FIG. The shafts 104 and 112, however, are clockwise driven. On the shaft 266 sits a gear 284, which with a gear 286 on the Wave 192 combs. The gear 286 in turn drives a gear 288 on the shaft 194 to produce a chain

'/ 8th

to set wheel 290 in rotation. This wheel 290, the other end of the spring 320, lies in an opening

drives a hook chain 292, which is driven by the chain 324 in a clutch brake disc 326, which its-

wheel 290 upwards on a chain wheel 294 on one hand loosely seated on the roller 58. It follows from this,

Shaft 162 runs to and then down by an empty that normally occurs with one rotation of shaft 60

running idler 296 on a shaft 298 in FIG. 5 the washer 318 the washer 326 with the help of the

of unit 26. Running from sprocket 296, spring 320 rotates and drives. Because the disc loosely on

Chain over a wheel 300 on the shaft 214. You can see the roller 58 sitting, it rotates freely on this,

so that when attaching the input device 26 with the help of the switch 314 is an electromagnet

gear 288 328 is turned on to the copier housing, and the switch is operated by the

comes into operative engagement with the gear wheel 286. OK leading edge of the original pressed. When the

The motor 242 thus drives the shaft 266 in the counter-electromagnet 328 whose armature 330 moves

Clockwise so that the shaft 192 is clockwise to the right, as can be seen in FIG. A feather

meaning, the drive shaft 172, however, in counterclockwise 332 establishes the connection of the armature 330 with the

clockwise and the drive shaft 214 also in one end of an actuating lever 334, the rotary

Clockwise via the chain 292 driven 15 bar on a shaft 336 is attached to the

will. Plate 24 is held. A brake shoe 342 is on

Fig. 2 shows that the main frame of the copy end of the operating lever 334 is removed from the

machine two adjustable guides 308 and 310 spring 332 attached.

for the copy material, between which the electromagnet 328 is energized, then moved

Copy material on its way to the conveyor rollers 20 his anchor to the right (see Fig. 7), and the

58 and 62 goes through. The distance between the brake shoe 342 comes with a predetermined one

Guides 308 and 310 are adjustable to provide copier frictional force for engagement with disk 326.

Use material of different widths. As a result of this frictional force, the shaft 60 rotates

be able. . continues and winds up the spring 320, its

From FIGS. 1 and 4 it can be seen that the diameter is reduced so that the spring coils

Original, as already mentioned above, come into engagement with drum 322 on arrival. Turns

Shaft 60 moves against window 186 of light from a source 196, then drives roller 58.

receives which on the surface of the original This clutch is maintained as long as

falls, and that an image of the original is excited by the opening electromagnet 328. If the electro-

tion 198 is reflected back in the reflector 200. 30 magnet in a manner to be described later

An optical system 302 is de-energized on the base plate 12, then a spring 344 moves on the shaft

arranged, in which a lens 304 is located, 336 the lever back to its starting position to

through which the reflected image passes and release the spring 320 which then unwinds,

a mirror 306 falls, the light up through so that the coupling between the shaft 60 and the

directs a window 92 through which the copy paper 35 is released from roller 58,

runs away. If the operating lever 334 rotates depending on

As mentioned above, when you push the solenoid 328, then drift speed of the copy start button 30 moves its lower end to the right and machine the chains 254 and 292 the different ones include a switch 454 (see Fig. 7). Through this Roll on in the manner described above. Should the 40 be the exposure lamps and the corona copier make a copy, then the direction is switched on and the circuit for the Original inserted into the opening 164 and forward with the aid of monitoring of the developing device Rolls 166 and 168 prepared through the gap.

between guides 174 and 176- The cutter 46 of the copier guided until it comes with a feeler 312 for engagement 45 according to the invention has a fixed knife, which actuates a microswitch 314. A sheet 346 on which is held by a rod 348 the operations that are carried out by the actuation of the switch, in turn, on an angle iron 350 on the 314 is started, consists in the one-side plate 24 is held. The rod 348 carries circuit of the transport device for the copier also two guides 352 and 354 for the paper. As mentioned above, this is done with 50 copy paper. Two shaft stubs 356 and 358 in With the aid of the clutch roller 58, which with the shaft 60 the side plates 22 and 24 carry a support is coupled. On its way through the conveyor rod for a rotating knife blade 360. A device meets the original on a lower angle lever 362 can be pivoted so that Sensor 315, the actuation of a switch 486 he the movable rod on the fixed serves. The switches 314 and 486 are moved past this 55 knife blade 364 by the length of the Guide example to cut copy paper on the detachable device 26, which is however, they can also be conveyed through by machine if necessary. As above Main part of the machine, as mentioned above, this cutting process must be carried out with the by producing the necessary electrical interruption in the drive for the paper feed Connections is facilitated. 60 will be synchronized as soon as the full picture

FIGS. 5 to 9 show that a bearing of the original has been thrown onto the paper.

316 between the end of the shaft 60 and the roller. When this is done, the electromagnet 328 becomes

58 is arranged outside the plate 24. The end shut off.

of the shaft 60 carries a short shaft 364 rotating together with it, which is rotatable in the plate 24

resilient washer 318. This washer 318 65 supported while one of the plate 24 with the help

receives one end of a clutch spring 320, the spacer 340 spaced plate

around a clutch drum 322 on the roller 58 338 carries a gear 336, which is driven by a toothed

is lying around and turns with it. wheel 368 is driven on the shaft 70, which its-

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is driven with the help of the sprocket 252, rotates in a clockwise direction until a stop on the trigger as long as the copier is in operation. The shaft comes into engagement with the lever (see Fig. 7).
364 carries a revolving cam 370 with the solenoid 328 being energized to initiate the conveyance of copy paper at diametrically opposed locations on the protruding humps 372 and 374. If the cam 370 5 then does not rotate the lever 334 counterclockwise, the protruding stool is located to bring the shoe 342 with the disc 326 to 372 or 374 at a point at which the cam engages. In the course of this movement, which cooperates with a cam sensor 376 coming from levers, a finger 422 on the lever 334 is carried to a pin 378 on a lever 380, engaging an extension 424 at the top which in turn around a pin 382 on the plate 338 io of the trigger 416. Is rotatable as a result of the direction of action. A spring 384 between the end of the spring 418 is held astride the finger 422 by the extension lever 380, which is removed from the pin 382. When there is movement, and a pin 386 on the plate 338 pushes gear in the opposite direction, that is, when de-speaking lever 380 normally in such a direction that the electromagnet 328, the finger comes to the 15 422 that it rotates counterclockwise, comes into engagement with extension 424 to rotate cam feeler 376 counterclockwise to engage cam 370 and lever 408 (see Fig. 7). An actuating pin 388 on the pawl 412 disengages from one of the pawl levers 380 engages a slot 390 in a tooth 398 or 400 of the ratchet wheel comes to crank 362 a. to release the ratchet wheel and that way of the

The cam 370 moves counterclockwise to allow 20 spring 402 to move with the drum 404 sense how this F i g. 7 shows then the engagement would come to make the wheel 396 hump 372 under the cam sensor 376 away together with the cam 370 and together with the gen, and the spring 384 would rotate the operating lever shaft 364. In this case it moves 380 move down counterclockwise, like a neckline or a stool, for example the this F i g. 7 shows. This movement causes the 25 stool, 372, to move out of position under the cam-blade 360 feeler 376 past the knife blade 346. The spring 384 operates the lever is moved to 380 the paper to the intended length and the pin 388 operates the crank 362 im to cut. If this happens, then there is a sense of movement of the movable knife bar switch lever 392 on the operating lever 380 to 360, which the copy material to the desired Engages a shock absorber block 394 at the 30th length intersects. The shaft 364 continues to rotate until Plate 338. The overall arrangement is such that the lock 412 engages with the tooth 398 found that the actuation of the lever 380 overcomes to disengage the coupling with the shaft. In Agreement with the interruption of the drive for this point in time is the movable knife with the help the paper is fed. of the other hump 374 is reset again

A ratchet wheel 35 sits loosely on shaft 364.

396 showing a pair of teeth 398 and 400 in places. In one embodiment of the copier machine

which essentially correspond to the points, according to the invention, a can occur at point 52

where the cam extensions or stool dry developer are, as it is elsewhere

372 and 374 are located. A helical spring 402 is described around it. In this developing device

.a clutch drum 404 on shaft 364 4 °, an iron bar 534 collects all excess

lying around; it normally tries to pick up stray particles on its own so that they do not hit the copy

wind up so that they fall into engagement with the drum material, as long as this is due to the development

mel 404 is coming. The ends of the spring 402 are moved through with a winder. Optionally, in the

the ratchet wheel 396 or with the cam 370 copier machine a wet developer can also be used

connected. These two parts can be freely chosen, as described elsewhere.

move, then the spring 402 winds around. FIG. 10 shows the embodiment of a unified

the drum 404 around a friction clutch fold circuit diagram for the electrical control of the

between the shaft 364, the pawl 396 and the copying machine according to the invention. Since the respective

To bring about cam 370. Developer device that is installed in the machine for

A shaft 406 on the plate 338 is used for turning 50, does not form part of the invention, Ability to mount a lever 408. A spring 410 is the associated switching elements in FIG. 10 not The shaft 406 pushes the lever 408 normally included. Via fuses 426 and 428 erin a position in which a lock 412 follows the connection of the switching arrangement to terminals gripped with the surface of the ratchet wheel 396's. 430 and 432 of a suitable electric current- Assumed the lock 412 is completely out of engagement 55 source, for example an AC network for with one of the teeth 398 and 400, then there is 110 volts and 60 hertz. Locked accordingly Frictional coupling between the shaft 364, the wheel switch 434, which has a mechanical connection 396 and the cam 370. Finally, there is 440 connected to each other, and front linkers of teeth 398 or 400 in engagement with the interlock switch 438, which is operated by a mechanical Lock 412 to hold the ratchet wheel in place. 60 connection 440 are coupled together If this occurs, then the direction of rotation is the connection of the fuses 426 and 428 Shaft 364 so that the spring 402 is unwound, with off switches 442, which in turn by a coupled to the drive connection between the shaft and mechanical connection 444 the cam 370 to solve. are. In this way, the fuses set

A pin 414 on lever 408 holds a trigger 65, 426 and 428 along with switches 434, 438

416 in rotary connection, which is normally located under and 442 the connection of the mains terminals 430 and

the pressure of a spring 418 between the trigger 432 with the main lines 446 and 448 of the control

and the lever 408 and is in the counterclockwise circle. As you can see without further ado, must.

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before the copier is started, 490 brings. This creates a holding circuit for the the rear door and lid are closed winding 470 bypassing switch 466 so that switches 434 and 438 are also closed. Eventually the trailing edge of the are closed, while the circuit breaker 442 Originals, the sensor 312, and a switching arm 314 affected is. 5 moves away from contact 464 and back up again

For the purpose of commissioning the copier, contact 458 too. This creates the circuit

machine, the switches 442 must be inserted, interrupted for the electromagnet 328, and the

around the main lines 446 and 448 under voltage switch arm 380 can actuate the cutting device.

to put. The connection of the heating device This movement of the switching arm 380 has the consequence

128 to the lines 446 and 448 takes place via thermo that the switching arm 354 also moves away from the contact

mostaten 450. The main drive 456 is then released to engage contact 492

Motor 242 and a fan motor 452 come to the main, in order in this way the copier

lines 426 and 428 are connected, so that when you switch on again step by step, how this is done

closed switches 442 the heating device must, if several copies of one and the other

device 128 and the motors 242 and 452 switched on 15 the same original are to be produced. In the end

are. if the trailing edge of the original leaves feeler 315,

Another switch 454 is normally over and the switch arm 486 returns to contact 488

the knife lever 380 to a contact 456. The back to this way the relay winding 470

Winding 328 of the electromagnet is between to de-energize, so the machine for the next

contact 456 and contact arm 314 of 20 is ready for copying.

top switch depending on whether the As detailed in an earlier patent application Sensor 312 is first described from the leading edge of an ori, such can be electrostatic ginals is taken, which in the machine acting copying machine with a device for has been laid. Before the original is inserted, make repeated copies of it, a lever arm 314 moves a contact 458. Such a device consists essentially of Incandescent lamp 459, which is used to display a number of conductive segments 494 that have passed through position, is between the contact 458 and a non-conductive intermediate space 496 from each other geKontakt 460, on which the switching arm 462 is located, are separated and on the other hand on a common one which are attached to the repetitive manufacture electrically conductive ring 498. A brush 500 can ment of copies (not shown) and 30 grind on segments 494 while a second is normally on to indicate that brush 502 is dragging on ring 498. The ring 498 the machine is ready to accept copies. and contacts 494 are based on a washer If the circuit breakers 442 are engaged, then one shaft 504 is held in order to be connected to this circuit for the incandescent bulbs 459 to rotate normally. A 506 motor for gradual passing the main line 446, the switching arm 454, a 35 drawer for making multiple copies is between Contact 456, winding 328, contact arm 314, a contact 494, and a contact 508 connected to Contact 458, the lamp itself and, via the contact, a switching arm 462 brought into contact and the contact arm 462 to the main line. Should copies be made repeatedly closed. If the lamp lights up, the shaft 504 turns around the brush to show that a "deposit" has occurred, then 4 ° 500 flows onto one of the spaces 496 between the not enough current through winding 328 to set segments. At the same time do the switching To excite magnets. arm 462 contact with fixed contact 508.

If the machine is ready for operation in this way, the shift lever 380 is actuated in such a way that the

makes, then the original is touched in the conveyor switch arm 454 the contact 492, then he

loaded for the original, and its guide 45, the motor 506 holds a pulse and rotates over

edge first encounters the feeler 312, the lever of which is sufficient to move the brush 500 to the

arm 314 out of engagement with contact 458 and engaging segment 494 toward one

comes into engagement with contact 464. Does this bring decreasing number of copies. the

happen, then the strength of the current through closed contact completes a holding

the winding 328 off to excite the winding 50 circuit for the motor to enable it to

and pushing lever 334 to the right, as this allowed to rotate a sufficient distance

F i g. 7 shows, and to enable it in this way, and thereby the brush 500 on the next

that a switch arm 466 contacts a contact 458. space between the segments in the direction

A relay winding 470 is now in series with a decreasing number of copies to be loaded.

the switch 466 on the main lines 446 and 55 because of. Eventually, the mechanism for re-

448 and is excited to put back two normally open fetched making copies,

To close switches 472 and 474, the relay and switch arm 462 moves away from the contact

winding 470 are assigned. By this switch 508 away and applies to contact 460 to

Operation received two secondary control lines 476 to turn off the retry mechanism,

and 478 voltage to an exposure lamp 480 60. If the switching arm 462 has moved from the contact 460

to feed and at the same time voltage to the high-released and it is applied to the contact 508, then

Applying voltage source 482 to the glow wires extinguishes the incandescent lamp 459, while a lamp 510

the corona device 82 to be able to feed. is fed from a transformer 512 in order to

On its way through the transport device those copies to which the machine is set

for the original hits the leading edge of the original 65 is to be brought onto a screen,

to a second sensor 315, which is a switch 484. If an original is fed into the conveying device 26

disengaged from one with a switch arm 486 then contacts the leading edge of the original

Contact 488 and for engagement with a contact first a sensor 312, the lever arm 314 for

Engages a contact 464 and energizes the solenoid 328. This creates the lever arm 334 is rotated counterclockwise to engage the brake shoe 362 with the disc 326 bring and thus couple the roller 58 into the drive train. The copy material is now from the Supply roll 40 out through the cutting point 48, through the exposure zone 50, through the developing device 52 and finally through the fixing device and back into the transport device 54 so that it comes back to the user of the machine.

Before the trailing edge of the original leaves the feeler 312, the leading edge contacts the feeler 315, and this has the consequence that the switching arm 486 contacts the contact 490. Through this contact closure the switch 446 is bypassed, and a holding circuit for the winding 470 is created. If the trailing edge of the original leaves the feeler 312, then the contact arm 314 disengages from it Contact 464 and returns to contact 458. This de-energizes the winding 328, and the Lever 334 returns to its original position. This switching process opens switch 444, but as a result of the contact between switch arm 486 and contact 490, the winding remains energized. Turns the lever 334 returns to its original position, then the finger 422 actuates the trigger 424 to it the To enable spring 402 to engage the pawl 396 and the cam 370 also with the Connect shaft 364. When this happens, the spring 384 actuates the cutter to stop the copier " pruning material.

Of course, the supply roll 58 is also uncoupled as soon as the lever 334 is in its starting position returns. Both the original and the copy material trimmed to the correct length now move on the transport routes assigned to them in order to complete the exposure process. If the trailing edge of the original has passed window 186, then it also leaves the sensor 315, so that the switch contact arm 486 falls back again and rests against the contact 488. At this point, the relay winding 470 is de-energized, and the exposure lamp 480 and the high-voltage source 482 are disconnected from the power source. The arrangement is such that the distance between the sensors 312 and 315 the distance between the knife bar 360 and corresponds to the far edge of the exposure window. This has the extraordinary advantage that not only is the copy material trimmed to exactly the same length as the original, but at the same time, one achieves with certainty that the exposure is carried out completely and properly will.

After performing the operations described above, the copy material is passed through the developing device 52 and through the fixing device 54 and is finally through the opening 56 promoted to be made available to the user of the machine. Is only one Copy has been made, then the original is attached to the guide rail 216 through the opening 218 returned to the user. If, on the other hand, the guardrail is in the position for the production of several Copies of an original, then the original is moved several times through the machine, accordingly the number of copies to be made until finally the mechanism for the production of repeated copies is halted.

Claims (7)

Patent claims: 1. Photocopier with a lighting window and a copy window where the Original or copy paper are guided along, and each with a transport device for the original and the copy paper that is fed from a supply roll via a cutter is guided to the copy window, and with a light source for illuminating the original and a reflection system that directs the beam path from the illumination window to the copy window, and with devices that have the effect that by inserting the original, the device automatically in Operation is set and that the cutting device is controlled by the trailing edge of the original is, characterized in that in front of and behind the lighting window (186) in the Path of the original is a switch (312, 315) is arranged such that the distance between the first switch (312) and the beginning of the lighting window (186) equal to the distance between the cutter and the beginning of the copy window (92) and the second switch (315) is the same distance from the first as the cutter (46) is to the end of the Copy window (92), such that when inserting the original by means of the first switch (312) the movement of the transport system for the copy paper is triggered and the lamp (196) is switched on becomes, while as it passes through the trailing edge of the original, the first switch (312) is usually energized at the same time standing cutting device (46), one fixed (346) and one by a spring (384) has movable part (360), triggers and prevents the further supply of copy paper (38), while the leading edge of the original through the second switching element (315) the circuit the lamp (196) is kept closed until the rear edge of the original hits the switching element happened. 2. Photocopier according to claim 1, characterized by a drive system with shafts and a normally disengaged clutch between a conveyor roller and the first shaft (406) and a normally engaged coupling between a control cam (370) and the second wave. 3. Photocopier according to claim 1 and 2, characterized by a shaft (364) on which a The ratchet wheel (396), which has two teeth (398 and 400) at the points, is loosely seated which are cam extensions or stools (372 and 374), and a spiral spring (402) which is wrapped around a clutch drum (322) arranged on the shaft (364) and the ends of which are connected to the ratchet wheel (396) and to the cam (370), respectively. 4. Photocopier according to claim 1 and 3, characterized by a conveyor roller (58) which Feeds copy paper (38) to the cutting device (46). 5. photocopier according to claim 1 to 4, characterized in that an operating lever (380) is provided, to which a switch-off lever (392) is attached, which is connected to a shock absorber block (394) can be engaged on a plate (338), the overall assembly is so taken that the actuation of the lever (380) in accordance with the The drive for the paper feed is interrupted. 6. Photocopier according to claim 1 to 5, characterized by one on the end of a Shaft (60) arranged, circumferential, resilient washer (318), the one end of a clutch spring (320) which is wrapped around a clutch drum (322) on the roller and rotates together with it while the other end of the spring (320) enters an opening (324) engages in a clutch brake disc, which in turn sits loosely on the clutch roller (58). 7. photocopier according to claim 1 to 6, characterized in that the sheet of copy material (38), which comes from the supply roll (40) and has the length of the original, of Rolls (120 and 148) two guides (152 and 154) is fed, which in turn the sheet to the Feed gap between two further rollers (156 and 158), which serve as end rollers and the Feed the sheet through an opening (56) onto the uppermost surface of the end cover (16). For this purpose 3 sheets of drawings 909 548/57