DE1772173A1 - Electrostatic desk copy machine - Google Patents

Description

PA TGNTA Α / WÄ'L TB PATENT Attorney DlPL-ING. R. MDLLER-BDRNER PATENTANWALT DIPL-ING. HANS-H. WEY B E R LI N- DAHLEM 33. POD BI E LS KIALLE E 68 8 MÖNCHEN 22- WIDENM AY ERSTRASSE TEL. 0311 762907 TELEGR. PROPINDUS. TELEX 0184 057 TEL. 0811. 225585. TELEGR. PROPINDUS TELEX 0524244

Ing.C. Olivetti & C, S.p.A. Ivrea / Italy

Desk electrostatic copier

The invention relates to an electrostatic desk copier. The invention relates to an electrostatic copier, in which the original to be copied with a Photo-sensitive copy material essentially during the charging and exposure process is kept in contact.

The invention generally relates to improvements in an electrostatic copier and in particular on a desk copier with reduced The size of the machine and easier handling for the developer.

The use of electrostatic copying devices has in has gained increasing importance in recent years. Many of the first electrostatic copier machines were console-type and set up as a central copier station for an entire office or a whole department. Because such

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Machines are undoubtedly important and needed a secretary at some point had to have her desk leave to make the copies you need.

When a secretary has a large number during one day of making copies, she spends a considerable amount of time walking between her desk and the Copy machine, plus waiting times until the machine is available, especially if there are many People use the machine. For this reason it is advantageous to To have an electrostatic copier that is part of the secretary's desk · It is especially important that the copier is small, powerful and can be easily operated by a secretary at her desk without making unnecessary movements or Efforts required

Desk copiers aren't just for making various types of copies of papers that are across the table Come to a secretary, important, but also for making copies of typewriter letters. In preparation A secretary needs a secretary for letters with multiple copies a considerable time for the arrangement of the paper with carbon sheets and then again for the separation of the Carbon sheets from paper or copies · Furthermore, a typographical error must not only be on the original, but also on the copies

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Getting corrected. This method is wasted time and causes line shifts on the copies, though has to be corrected several times. With a desktop copier it is possible to make any required number of copies of the typewriter original with a normal letter not consuming more than a few minutes.

In a desk copier, the space required for the liquid developer that makes the most effective copies is limited the size of the device ο when using a liquid It is important to the developer that it can be handled easily, so that the possibilities of potting and thus the Soiling of the hands or clothes of a secretary cannot occur. In summary, it is important to be relative To create cheap development container, which is held in a sealed guide and prevents pouring and can also be easily brought into position and operated. After all, it is important to be in a compact design to connect those elements that make the foregoing possible, for example in a combination the toner container and to create the development trough.

The main object of the invention is to provide a desk copier that is simple in construction, powerful in operation and has compact dimensions

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Furthermore, a toner apparatus is sought which is inserted in the device in a sealed manner and which is easily inserted and can be removed again.

The invention also relates to such a toner container, which is designed with its development trough in such a way that it the number of different elements in the device largely reduced »

Another object of the invention relates to the creation of simple operating devices for the placement of the sealed toner container in its working position and for piercing the seal of the container to allow a flow to enable the developer in the development trough »

Finally, the invention provides devices for the precise introduction of the copy material and that to be copied Original shown in front of the exposure section, the crumpling or some other disturbance of or in the copy material impede.

The invention also provides a simple electrical time circuit for varying the exposure intensity of the Exposure lamp and for preheating it.

Accordingly, the invention is characterized by two on one horizontal lying edge movably connected to one another

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Frame parts and one attached to each frame oppositely arranged wedge one Charging housing by a provided in a frame Lamp housing, the open side of which is assigned to a multi-section compressible guide, which is in the other Frame is attached, and by drive means in front of the charging case and drive means after the lamp housing the end.

These and other features, objects, and advantages of the invention are set forth in the following description of a preferred one Facility brought close, whereby the example should not be seen in a limiting sense in which Reference is made to the accompanying drawings o

In the drawings, FIG. 1 a perspective View of a desk copier in an embodiment according to the invention,

Pig. Figure 2 is a cross-section of the device of Figure 1 with the cover removed;

. Fig. 3 shows a plan view of the device of Figure 2, Figures 4a and 4b give vergrösaerte Einzelansich- th of exposure and of the charging and the merging paths, as embodied in the illustrated device, Wied <r _e

Figure "5 is a detail view iat dea Tonergeatella and behaviors Bedienungseinriohtung in the illustrated device,

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Fig. 6 shows a single view of the toner container in connection with the implementation used according to the invention and

Pig _o 7 shows schematically the electrical circuit for the lamp in device o

The present invention is an improvement on the electrostatic copier as disclosed in U.S. Patent Application Ser. Ο described 538,443 on 28 «February 1966 by Bernhard fireplace stone and Henry Go Joel From the same inventors patent application US Sero Noο was 566,512 discloses a toner container on July 20, 1966 in the one that is similar in the present invention.

In Fig. 1, a desk copier or copier 10 is shown with a cover 12. The cover is formed by a lower central portion 13A, a right side portion 13B, a left side portion 13C and an upper roof portion 13D. The side sections 13B and 13C are removable to gain access to the sides of the copier, and the top section 13D can be folded up for access from the top of the machine. The cover 12 is designed in such a way that any light entry into the machine that would destroy the charge of the copy material is prevented. At the front of the machine 10 is an inlet opening 14- for the introduction of the to

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copying original and the copy material provided; a frame 15 has a leading edge 15 A in accordance with the inlet opening 14, the frame at the same time to support the template with the copy paper »When in use, the frame extends horizontally and it falls in a vertical position against the cover when the copier is not in use ο is located under the inlet opening 14 an outlet opening 16 for the copy after it is on their Path through the machine has been made at the rear At the end of the roof of the machine is another outlet opening 18, from which the original comes after it has been copied on its way through the machine ο

A dividing plate 20 is provided in the inlet opening 14, which serves to guide the original to be copied and the copy material during input fed ₀ Las copy material has a photosensitive layer on one side, for example made of zinc oxide. When entering the inlet opening 14, the photosensitive side of the copy material is brought to the writing side of the original to be copied

The copier is operated by a small electric motor, which is not shown in Fig. 2 and for which an on / off switch 22 on the lower cover 12 A on the front

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mounted i3to Below switch 22 is a selector switch 24 arranged, which allows the surgeon to set the exposure intensity required for an original to be copied.

In FIGS. 2, 4a and 5, the internal structure of the copying machine 10 is shown, in a sectional division, doh shown »In the copier is a frame 37, consisting of two interconnected and spatially separated frames, provided as a support for the cover 12 and various internal parts Rack 38 is provided, which extends across the machine and is attached to the frame, and which is in one plane with the articulated frame 15 and thus served as a support for the introduction of the template with the copy material into the inlet opening 14 spatially separated from the This is rack 38 and offset slightly inwards from the front of the machine Divider 20 Arranged As can be seen in Figures 1 and 3, the leading edge of the divider 20 is angled toward the front of the copier, thereby facilitating the introduction of the material into the copier over and across the divider

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Extending the inlet of the copier is a guide plate 40 provided, which is formed by part of the upper portion 13 D of the cover; the plate serves as a guide to the materials fed into the copier.

If a copy of a gate layer or something similar is made is to be, then this is placed with the writing side down on the dividing plate 20, and the copy material is placed underneath on rack 38 with the photosensitive side facing upwards. «The surgeon places the template and the copy material in register with its leading edges together, so that both pass from the inlet section 26 into the drive rollers 42 and 44, with only one side Translucent originals can be copied from the drive rollers is one in the upper frame section 37A about the other mounted in the lower frame section 37B and with its cooperating surfaces the incoming original with the copy material for the path through the charging section 28 and the exposure section 30 to a further sloping path press together <> The plane through the center points of the rollers lies in one slight angle to the vertical. The lower or drive roller 42 has a sprocket 46 at its right end and is fastened in the lower frame section 37 B, while the upper or driven roller 44 with its ends in a slot guide 48 the frame section 37 A is mounted »Resilient devices 49 press the upper roller 44 downwards against it

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the lower roller 42, creating different thicknesses of the originals and copy material as it is fed through the copier can be compensated · While the copy material generally has a uniform thickness, the The thickness of the templates can be varied, so that certain tolerances are compensated for when passing through the hollow 42 and 44 must be o

Behind the drive rollers 42 and 44 in the charging section 28 is a pair of opposing charging cases 50 attached, one of which is mounted in the upper frame section 37 A and the other in the lower frame section 37 B » The housings are arranged at a slight angle to the horizontal so that the original and the copy material follow obliquely down from the inlet section 26 into the charging section 28 o The charging housings 50 extend across the copier and each of them contains a number of corona discharge wires 52, preferably made of tungsten. The template and that Copy material is between the Aufladegehauaen 50 and thin nylon wires 54 passed, which extend across the width of the open ends of the housing and any pollution or prevent damage to the sides when passing through. The guide and edges of the housings 50 are diverging, so that the sides can be passed through without hindrance »

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In the exposure section 30, a lamp housing 56 is provided via a compressible guide 58, specifically also at a slight angle to the horizontal, the same as that for the charging housing 50, whereby the inclined The path leading down and back for the original and the copy material is further supplemented o In the lamp housing 56, which is held in base 59 attached to the frame, is a lamp 60 provided with a reflector 62

For economic reasons, a fluorescent lamp 60 is used, the light of which shines through the original the legible copies are to be made from a permeable material. »A plate 64 covers the lower opening of the lamp housing, the plate 64 made of glass, transparent or similar material with a rigid Surface for the transport of the original and the copy material is formed · The compressible guide 58 contains a transverse shaft 66 which is mounted in slots provided in the lower frame section 37 B and takes into account the different thicknesses of original and copy material · Above the shaft is a plurality of Pressure devices for the pressure pad 68 mounted «Each pressure device for the pressure pad 68 contains a base plate 70 with a pair of downwardly directed retaining plates 72 at their ends, with the retaining plates Slots are provided in which the shaft is also supported · The retaining plates 72 are opposite the shaft fixed by means of springs 74 · on base plates 70

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is a cushion 76 made of rebounding material such as molded rubber or other foams attached. As the uppermost layer on the cushion 76, there is also a light-absorbing thin layer 77 applied. The forward facing edges of the lamp housing 56 and the compressible guide 58 are diverging to allow easy guidance of the original with the copy material for each individual print between the plate 64 and the pressure pad 68 to ensure

Any other device for the pressure pad 68 is resiliently mounted and can be independent of the adjacent components deflect · This construction eliminates local vibrations when the template and the Copy material on the plate 64 is kept free of the latter, whereby any disturbance in the exposure phase is avoided β

A second pair of drive rollers 78 and 80 are provided behind the exposure section 30 to guide the inputted pages through the copier. The drive rollers 78 and 80 are similar to the first pair of drive rollers 42 and 44, the lower or drive roller 78 is located in the lower frame section 37B and is provided at one end with a sprocket 79, while the upper or driven roller 80 resiliently in the slot guide 77 is arranged in the upper frame section 37 A _e By resilient supports 81 of the upper roller 80 relative to the frame, the

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upper roller pressed down in the slot of the frame, and on the combination of original and copy material passed between the rollers.

A pair of oppositely curved plates 82 and 84 secured in the lower frame portion 37B serve as a separating guide for the original and the copy material in the separating section 32 after the rollers 78 and 80. At one end Another plate 86, located behind plates 82 and 84, is a pair of thin, flat wires 88 attached These wires are hooked on the other hand on the back of the divider plate 20 and extend at the level of the plates 82 and 84, forming a point of intersection between the rollers 78 and 80, the lamp housing 56, the compressible guide 58, the charging case 50 and rollers 42 and 44ο Although the original and copy material are essentially in contact on their way through the charging and exposing sections the wires 88 sandwiched between the two sheets, thereby separating the copy material from the original after passing through the rollers 78 and 80 is facilitated · Preferably the wires are made of tungsten or a similar material and mounted converging from the front to the back of the copier

In the separating section, the original runs through the plate 84 and the shaft 85 upwards to the outlet opening 18 in the upper rear Part of the Maachine »At the same time, the copying

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material along the plate 82 down the development section In the developing section 34 is a support frame 90 having an upper pair of support members 92 and a lower frame 94 which can be folded down via a shaft 95 and which is in a lower storage and unloading position and can be brought into an upper working position. A generally L-shaped joint 96 is on its lower End attached to the frame 94 and the shaft 95 and with its upper end to the movable hand lever 98 connected »A removable and accordingly re-insertable toner container 100 is in the support frame 90 arranged The container is made of a plastic material and on its top with a concave shaped Provided trough 102, in which the copy material runs after the separating section »The toner container 100 is sealed when initially placed in the machine to prevent pouring during the filling and insertion process to prevent. When the rack 94 is lowered, the container slide easily into place · When the hand lever 98 is moved to its rearward position, the frame swings 94 up and brings the toner container into contact with the support members 92, where it is in the working position is held securely »In this position the container is ready to pour toner liquid into the trough 102 allow.

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In the lower frame portion 37 B of the copier, an air pump 104 is mounted, the line 106 from the pump to The toner container has o Part of the line 106 leads through a column 107 to its end 108, which protrudes into the container and of a rigid material having a cutting edge for piercing a sealed opening of the container is made to Furthermore, a second piercer 109 is dependent on the movement of the Pillar 107 and provided along the end of the conduit 108, with which a second sealed opening is made in the toner container can be so that toner liquid can enter the development trough 102 «,

In connection with the position of the frame 94, the hand lever 98 controls the position of the column 107 for the movement of the line end 108 of the line 106 and the piercer 109 provided with the cut _{edge down through sealed openings in the container 0} One end of the hand lever has a partial curve section 110, which is provided with gear teeth, which are in engagement with a rack 112 attached to the column. At the same time as the toner container is brought into position, the cam section 110 on the hand lever guides the rack 112 and thus the line 106 with it its bevelled line end 108 and the piercer 109 downwards, whereby the sealed openings arise with the piercing into the toner container · Conversely, if a

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Container is brought into its lower position by the return movement of the lever 98 via the joint 96 and the frame 94, then the container becomes free, and as the column 107 moves upward, the line 106 and piercer 109 also come off Container free.

Pump 104 delivers air through line 106 into the container 100, whereby the toner liquid flows through the opening made with the piercer 109 into the trough 102 »Auf Slidably mounted on the line 106 is a float 116 which regulates the level of the toner liquid in the development trough the toner liquid has reached its working height, then the swimmer causes the air to escape via a bypass, to avoid any further inflow into the trough if the level of the toner liquid drops, then the float 116 opens the direct air inlet into the container, whereby the toner liquid is replenished in the trough when not in use of the copier, the toner liquid flows from the trough back into the container »A more detailed description of the construction and mode of operation of the toner container is described in the aforementioned US patent application Ser. No, 566 512 given.

A little above and in front of the developing section is a pair of rollers 118, 120 for drying the copy material after its passage through the development trough 102 and its forwarding to the outlet opening 16 is provided. The top or

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Driving roller 118 has a sprocket 119 mounted on its outer end. The outer surface of the rollers is made made of rubber or similar material for stripping the toner liquid from the copy material. A drip plate 121 is hung in the frame 37 to hold the toner liquid from rollers 118 and 120 back into the trough.

On the left side of the machine, in the front, is a fan 122 which directs air against the copy material when it is guided by the dryer rollers to the outlet opening o A motor is provided on the left rear side of the copier, which via a worm gear 125 with the Main drive sprocket 126 at the opposite end of the The dryer roller 118 is connected to the sprocket 119 » Simultaneously, the motor operates the fan 122. Chains or belts 128 connect the sprockets 46, 79 and 119 at the ends of the rollers 42, 78 and 118 and thus generate the drive for the forwarding of the original and of the copy material in the copier "

A first microswitch 130 is between the drive rollers 42, 44 and the charging case 52 and a second microswitch is in the separating section 32 for controlling the charging and Beliefing section provided

The upper frame section 37 A is movably connected to the lower frame section 37 B by an axis 134.

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The roller 48, the upper charging housing 52, the lamp housing 56 and the roller 80 are in the upper frame section 37 A mounted »At the same time as the upper section 13 D of the cover, the upper frame section 37 A can be separated from the rest of the Lift off the copier, exposing the path of the original and copy material If the passage through the copier is jammed or otherwise entangled, opening the top section the bug can be easily fixed.

When making copies in the device just described, an original and a copy sheet are placed on each side of the dividing plate 20 and pushed in until they are clamped by the rollers 42, 44. When the copier is on, the rollers rotate at a constant speed. Once the rollers 42, 44 have fed the original and copy sheet back and forth with the leading edge of the sheets, the microswitch 130 turns the corona wires 52 in the charger case 50 and the lamp in the lamp housing 56 is put into operation. The original lies with its writing side directly on the photosensitive layer of the copy sheet. As soon as the original and the copy sheet run through the charging housing 50, an electrostatic charge is applied to the photosensitive layer of the copy sheet by the corona wires 52 arranged opposite one another.From the charging section 28, the original and copy sheet pass between the plate 64 of the lamp housing a and the light absorbing layer 77.

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The printable guide presses the original and the copy sheet against the plate 64, so that the light through the original acts on the photosensitive layer of the copy sheet through both sheets not the copy sheet, but only discharges the remaining areas on the surface of the copy sheet. In this way, a latent image of the fonts is generated without symbols of the original on the copy sheet as it passes through the exposing section 30 _o The remaining on the copy sheet electrostatic charge is a latent image of the original again, and the residual charge disappears due to the light by the Template passes through

From the exposure section 30, the original and the copy sheet pass into the drive rollers 78, 80 and thereby move further guided backwards into the separating section 32, where the wires 88 in connection with the separating plates 82, 84 remove the template from Tear off the copy sheet, after which the original goes up to the discharge opening 18 and the copy sheet are fed down into the developing section 34. Once the trailing edges the microswitch 132 for the original and the copy sheet have happened, the corona wires 52 and the lamp are switched off and put out of operation

The copy sheet slides down into the development tray 102, and the now opposite of their position when passing through the

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Charging and exposure section downward-facing photosensitive Layer is pulled through the development trough. The toner liquid in the trough has an opposite direction Charge on so that the latent image is captured on the copy sheet and an exact reproduction of the written side of the original is made. Pull the drive rollers 78 and 80 the copy sheet through the development tray until it is pinched by the dryer rollers 118, 120. The dryer rollers remove the liquid from the copy sheet and direct it to outlet 16. Once the sheet is off the dryer rolls comes free, air is blown onto the sheet by the fan 122, so that a final drying takes place before it reached outlet 16

Have the background surfaces of the originals to be copied different reflection properties. For this reason it is necessary to have funds for adjusting the exposure time to be provided, which is used in the exposure section. The surgeon can use tests to determine which Times with different backgrounds of the originals are necessary in order to achieve optimal exposures of the original and the To achieve copy sheet, the lamp switching circuit; iat with five different exposure intensities and just such preheating for the lamp, so that the latter at the Making copies need not be particularly taken into account. Referring to Figure 7, there is a circuit diagram of the lamp circuit 140 with the lamp 142 and a progressive = acting, short

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. Switch 144 shown for five positions. With the on-off switch 146 the copier is switched on and, as soon as this switch is pressed, the lamp is also preheated, as long as the copier is at all exciting is connected «Load resistors 148, 150 and 152 are provided in the circuit, all for the Preheating the lamp are used while the Wideratande 148, 150 are also used for exposure through the lamp o By preselecting with the switch the surgeon can regulate the exposure intensity »

To change the toner fluid the right Side section 13 B of the cover are removed, which is hingedly attached to the central section 13 A of the cover is, and the hand lever must be moved 180 from its rear to its front position, whereby the frame is pushed out and the container comes free and at the same time the line 106 and the Piercer 109 can be guided out of the container. The old container is taken out and put away, with it is possible to refill and reseal it to use again «, the new container is inserted into the frame, which is brought into its upper position, brings the container to its place of work · The hand lever that moves the frame drives the beveled one Lead end 108 and piercer 109 through

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is pumped into the container the seal "in the air" so that liquid toner can fIiessen in developing trough ₀ When the operation is finished "is the cover section 13B retracted again

To access the electric motor, it is necessary »to remove the left side section 13C of the cover * Furthermore can when opening the roof section 13 D from the upper Frame section 37 A, the fluorescent lamp can be easily removed.

For the compact design of the machine, it is an important feature that the original with the copy material is guided downwards at an angle, which allows a reduction in the machine depth also the contact between the two papers, although the separating wires 88 are arranged between them. It is important that the separating wires are arranged at an angle with respect to the path of the original so that an minimum of kind of interference can be kept in the image formation on the copy sheet. It is also important that the multi-section, compressible guide prevents any shifting or deflection of the copy sheet a relative to the cause of the exposure, which could otherwise cause a disturbed image · * older sealed ·

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holds it avoids any spillage of the toner liquid. Its frames allow easy insertion of the container and secure a firm holding of the container during operation.

In connection with the precautions taken in the manner of the Subject of the invention in operation, it is determined that changes in the shape of the device by the Invention are also covered without being affected by the inventive concept as indicated in the following claims is deviated from, and that certain features can be used advantageously without a corresponding Application of the other characteristics.

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Claims (1)

~ 24 - Patent claims: 1 · Electrostatic copier, in which the original to be copied with a photosensitive copy material in the is essentially kept in contact during the charging and exposure process, characterized by two on a horizontally lying edge movably interconnected frame racks (37 A, 37 B) and in each case a part of a charging housing (50) arranged opposite one another and fastened in each frame by a lamp housing (56) provided in a frame (37 A), the open side of which is a multi-section is assigned compressible guide (58) which is fixed in the other frame (37 B), and through Drive means (42, 44) in front of the charging case and drive means (78, 80) after the lamp housing ο Copier according to claim 1, characterized in that 1Oi 1/1367 BATH ORIGINAL ~ 25 - the charging case (50), the lamp case (56) and the drive means (42, 44, 78, 80) are inclined at such an angle to the horizontal that they are to the rear there is a sloping path through the charging and exposure section 3 copier according to claim 1 and 2, characterized in that that opposite the one mounted in the upper frame (37 A) Lamp housing (56) a plurality of base plates (70) are attached separately and individually movably mounted, the one with a rebounding cushion (76) occupies the multi-section form compressible guide (58) " 4. copier according to claim 5, characterized in that the placed on the relatively rigid ü-round plates (70) Pillow (76) with a thin high-absorbent layer (77) provided on its surface into Copier according to Claim 1, characterized in that the lamp housing (56) has a pedal mechanism. t (VA) ? mschli f », which lies in front of the development u'iboahnit t (54) arranged in the inner frame O 7 B) 6, copier; according to claim 5, characterized by gokennzcichriet, <laaa! .η Trennab.'ichnit t {^ 2) v / fmi / '.' itenti <; in f; inem (thin wire -jobad ( (88) similar dividing means is arranged lying between the original and the copy material, which separates of both sheets after charging and exposure » 7. copier according to claim 1 and 5 »characterized in that that after the exposure section (30) and the separation section (32) provided developing section (54) Contains carrier frame (90) for an available and ready for distribution toner container (100), its upper side is closed by a trough-like surface (102), and that connecting means (106, 109) between the interior of the container and the trough are provided, which as well as a pump assembly (104) from the Containers are removable » 8. Copier according to claim 7, characterized in that the carrier spirit, el L (QO) is provided with support members (92), Gea parts (94) and ifelerilfon (%), via which the £:>m'C- container ( 100) both in working position as well as in a S te Lung for his replacement, ie. in eir.i jtere and an urn ·· ?; 3rd part brought v / Lrd. 9 “copier iiacih _; \ ru; pruch 8, Juduroh geiveiuii'.leehne »t, 'let for dLe movement .li ···' Präger ^ i \\. n L1 a (90) a hand lever ( ^c ) 8) with aru'oLerik on it '.on (rotr u; l »t !. ^{: i} li' idern vurfjtjnnn ^ n int * BAD OSiGINAL 10. Copier according to claim 7 _f, characterized in that the means connecting the container (100) and the trough (102) are movably mounted and designed so that they can penetrate the container wall, and that the height of the toner liquid in the trough is adjusted by an adjusting device (116) is controllable ο 11. Copier according to Claim 1, characterized in that a circuit (HO) is provided for the lamp (142), to which a multi-position switching unit (144) is assigned for a plurality of exposure intensities and for separate lamp preheating _e 389 - Hf 1 0 3 ^! "'/ 1367 IS Blank page