DE2454152A1 - DOUBLE PURPOSE LEAF HANDLING DEVICE - Google Patents

Description

PAT E N TA N WA LT E

A, GRÜNECKER

DIPL.-INS.

H. KINKELDt-Y

DH.-INS.

W. STOCKMAiR

DR.-IMG. AKIE (CALTcCCH)

K. SCHUMANN

DR. RER. NAT. · D! Pi ...- PHY5.

PH JAKOB P1PL.-ING.

G.BEZOLD

DR. RER. NAT. · DIPL-CHl = M.

MUNICH E. K. WEIL

DR. RER. OEC. JNe.

LINDAU

XEROX COHPOBATIQN

XEEOX SQUAEE

ROCHESTEE, NEW YORK 14603

United States

MUNICH 22

MAXIMILIANETRASSE 43

P 84-29-Sr

November 14, 1974

Dual purpose sheet handling device

The invention relates to a sheet handling device and relates in particular to use in a reproduction system which is capable of To produce simplex copies and duplex copies, whereby simplex copies also as single copies and duplex copies also as Double copies are to be designated.

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With the appearance of sophisticated copy / duplication ~ systerae is a growing need for rapid and reliable Distributing and handling of copy sheets occurred in both simplex and duplex operations. In of the past are inverters that were mainly used to handle documents when on copied on both sides, for example in U.S. Patents 3,408,140, 3,416,791, 3,561,865 and 3 227 4 - '+ ^ - has been described. It is also known To turn over cards and similar items for copying, as exemplified in U.S. Patent 2,901,246. While the existing facilities are suitable for some applications, they are for a sophisticated, high speed duplicating machine not entirely satisfactory, which is able to work in simplex mode and in duplex mode.

The object of the invention is to create a handling device with various copy sheets particularly quickly and can be reliably turned.

According to the invention there is provided a sheet handling apparatus which is suitable for use in high speed copier / duplicators all types can be used, which can work in simplex mode and in duplex mode. Basically, the invention provides one Device for reversing or turning over copy sheets, which has guide rollers resting against one another, the rotation about an axis through the gap between the two rollers to such a reversal of the Lead the copy sheet so that its rear edge becomes the front edge. This leads to the result that. a turning back or turning of the sheet is enabled without the need for a separate feed path or reversing the sheet drive

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mechanism would be required.

According to the invention, the device is thereby borrowed simplifies the fact that no device for reversing the sheet drive device or the sheet transport device is required is.

Furthermore, according to the invention, the sorting of copy sheets both in simplex operation and in duplex operation.

Another advantage of the device according to the invention is that the reversing or turning of copy sheets is extraordinary done easily and particularly reliably.

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The invention is illustrated below, for example, with reference to the Drawing described; in this show:

Pig. 1 is a perspective view of a high speed copy / duplicate system; which is able to perform duplex operation, including the improved treatment device according to the invention;

Fig. 2 is a schematic diagram showing the xerography components of the copier / duplication system,

3 shows a side view of the treatment device and

Fig. 4 is a top plan view of the sheet handling apparatus.

Fig. 1 shows a copy / reproduction system, v / elches is designated in its entirety by 2, and which is a copying machine 3 on v / e, which is called high-speed copier / Duplication device is able to produce either copies in simplex operation or in duplex operation. The copy machine 3 has a platen 4- for receiving documents to be reproduced, and it also has an operation panel 5 »which contains various control knobs, buttons and switches to enable different modes of operation such as a Set simplex operation or duplex operation for copying, The number of copies to be made can also be set. According to the invention, the copy / duplicate system a sheet handling device 8, the copies of which are designated by 6 in their entirety Sorting device feeds.

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As can be seen most clearly from FIG. 2, this has Copy / duplication system "an automatic Xerography ™ device which has a photosensitive plate, on which a photoconductive layer 10 is applied, which lies over a conductive carrier layer. The plate has the shape of a drum 11 and is attached to a Wells-12, which is rotatably mounted in the machine frame * Basically, the xerography drum rotates in that direction j Xv'elche is indicated by the arrow, being. moved past a series of xerography processing stations »The photosensitive drum and the xerography processor are driven at a predetermined speed with respect to each other by a (not shown) Propulsion system driven, and their operation is coordinated in such a way that proper cooperation ■ of the various processing facilities is.

The original to be reproduced is placed on a translucent horizontal support plate 4, and the original is scanned by a vision-moving optical scanning system to obtain a light beam image of the original to manufacture. The scanning system comprises a lamp 15 with an elongated horizontally expanded opening and a movable lens element 18. The lamp and that Lens elements move in a coordinated manner over the object, which is arranged on the plate, in order to to focus other incremental areas of the lighting, which of the object on which it is located synchronously moving drum surface are reflected. The optical path is through a pair of imaging mirrors 19 and 20 bent, which are arranged between the lens and the drum surface, and the drum is first uniformly charged with the aid of a corona generator 13, which is arranged in the charging station A. Under the influence of the radiation bundle, the uniformly

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2A54152

charged photoelectric surface selectively in the areas degraded in which there is no image to form the phenomenon commonly called "latent electrostatic Image "is called.

The electrostatic latent image is formed on the drum surface moved from the exposure station to the development station G. The development station primarily comprises a development housing 22 which is designed such that therein a supply of two-component development material 21 may be included. The developer material is applied by means of a scoop 23 from the bottom of the developer housing brought an elevated point from where the material is fed to the active development zone. The developer material is caused to flow down into contact with the upward moving drum surface, namely under closely controlled conditions, the charged toner particles from the developer mixture into the image areas ~ on the plate- surface are attracted so that the image becomes visible.

Then the moving drum surface brings the developed xerographic image to the transfer station D. Sliced Sheets of the final carrier material are also moved into the transfer station, with the back of the copy sheet is sprayed with an ion donor from a transfer corotron 25 with a charge on the sheet is present that has sufficient polarity and size to transfer the toner material from the drum surface to the final backing material to put on. This induced charge also electrostatically brings the final substrate to the drum surface. To get the copy sheet from the Removing drum surface is downstream of the transfer corotron a stripping finger 28 is arranged. This finger is designed in such a way that it is between the drum

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surface and the copy sheet moves and the sheet from d'er drum surface lifts, after which the copy sheet along a specified transport path with a stationary vacuum transport device 29- is brought into contact.

Although an excess of toner material from the toramel surface during the transfer process onto the copy sheet is brought, a certain amount of toner remains after the transfer on the drum surface, This remaining toner material is brought to a cleaning station E on the drum surface, where it is under the influence a cleaning corotron 30 arrives, which is designed in this way is that the electrostatic charge is neutralized, v; which tends to retain the residual toner to keep the drum surface. The neutralized toner material is mechanically applied by means of a brush or a similar device removed from the drum surface, and the toner powder is collected in a case 31. One Conveyor, which moves in an endless loop through the tubes 32, transports the collected Residual toner material back into the developer housing, where it is deposited within the developer mixture, so that it is reused in the xerographic development process can be.

The copy sheet, which after the transfer operation of the drum surface was removed, along the stationary transport device 29 in the baking station 3? emotional. The burn-in device 33 basically exists an upper burn-in roller 34 and a lower burn-in roller 35 »which are arranged and designed in relation to one another in such a way that they have a Hold the media sheet in contact with the print drive. The lower roller is heated. While the heated roller is in the direction indicated, the heated surface of the lower roller becomes close to the image surface of the carrier sheet

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pressed on. It gets mechanical · energy and heat energy from the roller surface transferred to the carrier sheet in order to permanently apply the toner particles to the carrier material.

After leaving the burn-in station, the fixed copy sheet becomes passed through a curved sheet guide system, which is designated in its entirety with 39, namely into cooperating transport rollers 43 and 44 «. At this point, depending on the selected operating mode the copy sheet is either fed directly to the sorting device or placed in an upper storage compartment 52, by means of a movable sheet guide device 45 'before the sheet enters the sheet handling device 8 got in. For simplex copying or simple copying the copier sheet is brought directly into the sheet handling device 8 to turn the sheet over before it is put into one the compartments of the sorting device 6 or a similar device is introduced. A typical sorting facility is described in U.S. Patent Application 319,957, which was filed December 29, 1972.

The above description should be sufficient to explain the explain the general operation of a xerographic reproduction machine. For a more detailed explanation the copy / duplication components of the corresponding For xerography equipment, see U.S. Patent 3,645,615 entitled Copier.

According to FIGS. 3 and 4, the sheet handling device 8 a frame containing rollers 101 and rollers 103, pick up the copy sheets from the copier / duplicator and either turn those copy sheets over before they are continued to the storage devices, or they are transported directly to the storage devices, what from the Operating mode depends. The rollers 101 are driven by a belt 110 which is continuously counterclockwise

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sinn rotates in order to bring the copy sheets S to the sorting device 6. Ii ¹ Ur a simplex mode, or a simple operation trigger signals from a sheet sensor such as a lamp and a photocell pair III, the sheet handling apparatus 8 so that the sheets S prior to further transport to der'Sortiereinrichtung 6 are reversed. Corresponding signals are used to energize a clutch 115 which engages a belt 120 which rotates the frame carrying the rollers 101 and 103 at the same speed and in the same direction as the rollers rotate. At the same time, signals which are fed to the electromagnetically actuated lock 121 are used to release the frame, as a result of which the rollers 101 and 10 can rotate about an axis through the gap N. There is no visible movement of the rollers. The lock 121 comes back into engagement with the frame, and the clutch 115 is disengaged after 180 of the frame carrying the rollers. It can be seen that during the rotation the sheet S is not conveyed on, but is wrapped around the rollers. As a result, the trailing edge of the sheet S becomes the leading edge and the upper side becomes the lower side of the sheet, thereby turning the sheet over. The sheet is then fed through feed rollers 130 and 132 which direct it to sorter 6. A similar operation takes place on the second sheet, with the frame rotating an additional 180 degrees. This process is continued with a full rotation of 360 ° for every two sheets.

By the invention described above, the copy sheets are either turned over or directly without any reversal Sorting device supplied from a treatment station, which depends on whether a simplex operation or a duplex operation takes place. It is still

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Obviously that the sheet handling device takes over the transport of the sheets without a separate path or one Reverse drive means is required for reversing the sheets.

While the fundamental new features according to the invention explained and based on a preferred embodiment. are shown, it should be noted that various Modifications or simplifications and alternative embodiments in the structure and details of the illustrated Arrangement are possible, and the operation can be modified accordingly, without the scope of the invention to leave.

- patent claims -

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Claims (3)

Claims 1. Duplication device for the production of simple and duplicate copies with a processing facility ;, in which the copies are made and then distributed, and with a data handling device, characterized in that a frame (8) it is provided that a first and a second roller device (1O1, 1O3) are present, which are arranged on the frame and define a gap, which serves to receive copy sheets (S) from eine.Ververarbeitungeinrichtung that furthermore a first drive device (110) is present, which for this purpose serves to drive one of the roller devices (1O1, 103), that a second drive device (120) is also provided, which serves to drive the first and the second roller device (1O1, 103) about an axis to rotate through the gap, and that a control device is present which serves to drive the second drive device (-120) in response to signals to rotate the frame (8) which the roller assemblies (1O1, 1O3) at an angle of 180 ° around an axis through the gap, whereby the The top of the copy sheets (S) become the bottom and the trailing edge of the copy sheets become the leading edge. 2. Apparatus according to claim 1, characterized marked net that the control means is a sheet scanner (111), which is used to generate electrical signals to create. 3. Apparatus according to claim 2, characterized net that the signals are an electrical coupling device Actuate (115), which is drivingly connected to the frame (8). 50 9 8 24/0808 BATH ORIGINAL 4-. Device according to one of Claims 2 or 3, 'characterized characterized in that the electrical signals are an electromagnetically operated locking device (121) control which, momentarily, can be removed from the path of the frame (8). 509824/0808