DE2167138C3 - Electrophotographic copier - Google Patents

Electrophotographic copier

Info

Publication number
DE2167138C3
DE2167138C3 DE2167138A DE2167138A DE2167138C3 DE 2167138 C3 DE2167138 C3 DE 2167138C3 DE 2167138 A DE2167138 A DE 2167138A DE 2167138 A DE2167138 A DE 2167138A DE 2167138 C3 DE2167138 C3 DE 2167138C3
Authority
DE
Germany
Prior art keywords
drum
recording material
material sheet
recording
cover
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE2167138A
Other languages
German (de)
Other versions
DE2167138B2 (en
Inventor
Masao Komae Tokyo Ariga
Motoharu Tokyo Fujii
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Publication of DE2167138B2 publication Critical patent/DE2167138B2/en
Application granted granted Critical
Publication of DE2167138C3 publication Critical patent/DE2167138C3/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/18—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements using a processing cartridge, whereby the process cartridge comprises at least two image processing means in a single unit
    • G03G21/1803—Arrangements or disposition of the complete process cartridge or parts thereof
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0865—Arrangements for supplying new developer
    • G03G15/0867—Arrangements for supplying new developer cylindrical developer cartridges, e.g. toner bottles for the developer replenishing opening
    • G03G15/0868—Toner cartridges fulfilling a continuous function within the electrographic apparatus during the use of the supplied developer material, e.g. toner discharge on demand, storing residual toner, acting as an active closure for the developer replenishing opening
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G15/28—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which projection is obtained by line scanning
    • G03G15/30—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which projection is obtained by line scanning in which projection is formed on a drum
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/60—Apparatus which relate to the handling of originals
    • G03G15/605—Holders for originals or exposure platens
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6532—Removing a copy sheet form a xerographic drum, band or plate
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/75—Details relating to xerographic drum, band or plate, e.g. replacing, testing
    • G03G15/751—Details relating to xerographic drum, band or plate, e.g. replacing, testing relating to drum
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/1604—Arrangement or disposition of the entire apparatus
    • G03G21/1623—Means to access the interior of the apparatus
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/06—Developing structures, details
    • G03G2215/066—Toner cartridge or other attachable and detachable container for supplying developer material to replace the used material
    • G03G2215/0663—Toner cartridge or other attachable and detachable container for supplying developer material to replace the used material having a longitudinal rotational axis, around which at least one part is rotated when mounting or using the cartridge
    • G03G2215/0673—Generally vertically mounting of said toner cartridge parallel to its longitudinal rotational axis
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/06—Developing structures, details
    • G03G2215/066—Toner cartridge or other attachable and detachable container for supplying developer material to replace the used material
    • G03G2215/0663—Toner cartridge or other attachable and detachable container for supplying developer material to replace the used material having a longitudinal rotational axis, around which at least one part is rotated when mounting or using the cartridge
    • G03G2215/0678—Bottle shaped container having a bottle neck for toner discharge
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/06—Developing structures, details
    • G03G2215/066—Toner cartridge or other attachable and detachable container for supplying developer material to replace the used material
    • G03G2215/0685—Toner cartridge or other attachable and detachable container for supplying developer material to replace the used material fulfilling a continuous function within the electrographic apparatus during the use of the supplied developer material, e.g. toner discharge on demand, storing residual toner, not acting as a passive closure for the developer replenishing opening
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/163—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for the developer unit
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/1651—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for connecting the different parts
    • G03G2221/1654—Locks and means for positioning or alignment
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/1651—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for connecting the different parts
    • G03G2221/1657—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for connecting the different parts transmitting mechanical drive power
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/1672—Paper handling
    • G03G2221/1675—Paper handling jam treatment
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/1678—Frame structures
    • G03G2221/1687—Frame structures using opening shell type machines, e.g. pivoting assemblies

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Dry Development In Electrophotography (AREA)
  • Electrophotography Configuration And Component (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)

Description

Die Erfindung bezieht sich auf ein elektrofotografisches K-opiergc-fät gemäß dem Oberbegriff des Patentanspruchs. The invention relates to an electrophotographic K-opiergc-fät according to the preamble of the claim.

In der DE-AS 15 22 151 ist ein Kopiergerät dieser Art beschrieben, bei dem ein Aufzeichnungsmaterialblatt in Form einer Bahn vorgesehen ist, die von einer innerhalb der Trommel angeordneten Abwickelspule durch Schlitze auf die Außenseite der Trommel und von dort zurück zu einer ebenfalls innerhalb der Trommel angeordneten Aufwickelspule geführt ist. Im Bereich der kein Aufzeichnungsmaterial tragenden Trommeloberfläche wrd diese von einem schwenkbaren Abdeckungsteil gebildet, dessen trommelstirnseitiger Rand zur Traiimelachse hin abgebogen ist Da eine Mehrzahl der über den Trommelumfang verteilten Einrichtungen die Trommeloberflä he berührt, muß die Oberfläche des Abdeckteils im Hinblick auf ihren Radius und ihre Beschaffenheit der Aufzeichnungsmaterialoberfläche entsprechen, wenn der Betrieb der Einrichtungen durch das Abdeckungsteil nicht beeinträchtigt werden soll.In DE-AS 15 22 151 a copier of this type is described in which a recording material sheet in Form of a web is provided, which is arranged by a supply reel arranged within the drum Slots on the outside of the drum and from there back to one also inside the drum arranged take-up reel is performed. In the area of the drum surface that does not carry any recording material This wrd is formed by a swiveling cover part, the drum face Edge is bent towards the Traiimelachse There is one Most of the devices distributed over the circumference of the drum touches the drum surface, must Surface of the cover part with regard to its radius and its nature of the recording material surface if the operation of the equipment is not impaired by the cover part shall be.

Ferner offenbart die FR-PS 15 56 091 ein elektrofotografisches Kopiergerät, bei dem ein Aufzeichnungsmaterialblatt um den Mantel einer zylindrischen Trommel gelegt und an seinen beiden Enden mit Hilfe von Haltegliedern in einer axial verlaufenden Trommelausnehmung befestigt ist. Die Halteglieder sind als Stifte ausgebildet, die durch Leisten an den Enden des Aufzeichnungsmaterialblattes ragen und gegen das Zentrum der Trommel elastisch vorgespannt sein können. Eine Abdeckung der axial verlaufenden Ausnehmung ist nicht vorgesehen.Furthermore, the FR-PS 15 56 091 discloses an electrophotographic Copier, in which a recording material sheet around the jacket of a cylindrical Drum placed and at both ends with the help of holding members in an axially extending drum recess is attached. The holding members are designed as pins, which are held by strips at the ends of the Recording material sheet protrude and be elastically biased against the center of the drum can. There is no provision for covering the axially extending recess.

Der Erfindung liegt die Aufgabe zugrunde, ein elektrofotografisches Kopiergerät gemäß dem Oberbegriff des Patentanspruchs derart weiterzubilden, daß die mit der Abdeckung verschlossene Ausnehmung die mechanisch auf das Aufzeichnungsmaterial einwirkenden Einrichtungen unabhängig Von der Beschaffenheit der Abdeckung nicht beeinträchtigt.The invention is based on the object of an electrophotographic copier according to the preamble of the claim in such a way that the recess closed with the cover the Mechanically acting devices on the recording material regardless of the nature the cover is not affected.

Diese Aufgabe wird erfindungsgemäß mit den im kennzeichnenden Teil des Patentanspruchs angegebenen Mitteln gelöst. Durch die erfinuungsgemäß vorgesehenen frei drehbar gelagerten Scheiben an beiden Trommelstirnseiten können Einrichtungen wie beispielsweise eine Bildübertragungstrommel oder eine Reinigungswalze so ausgelegt sein, daß sie im Bereich der Abdeckung auf diesen Scheiben aufliegen und demgemäß die zurückgesetzte Außenfläche der Abdekkung überhaupt nicht berühren. Es braucht daher kein besonderer Wert auf die Maßhaltigkeit der Abdeckung gelegt zu werden, Ebenso kann jedes beliebige Material für die Abdeckung verwendet werden. Ein wesentlicher Vorteil liegt darüberhinaus darin, daß jede rotierende Einrichtung, wie beispielsweise eine Bildübertragungswalze, unabhängig von der Rotation der Trommel weiter rotieren kann, wenn die Trommel angehalten wird, und sich die rotierende Einrichtung in diesemAccording to the invention, this object is given in the characterizing part of the claim Funds resolved. By the freely rotatably mounted disks provided according to the invention Both drum front sides can devices such as an image transfer drum or a Cleaning roller be designed so that they rest on these discs in the area of the cover and accordingly, do not touch the recessed outer surface of the cover at all. So it doesn't need a Particular emphasis is placed on the dimensional accuracy of the cover. Any material can also be used can be used for cover. A major advantage is that each rotating Means such as an image transfer roller independent of the rotation of the drum can continue to rotate when the drum is stopped, and the rotating device is in this

ίο Augenblick im Bereich der Abdeckung auf den drehbar gelagerten Scheiben abstützt Beispielsweise kann nach Abschluß der Bildübertragung die Trommel mit dem Aufzeichnungsmaterialblatt angehalten werden, während die Bildübertragungswalze beispielsweise zusammen mit einem Trennband auf den drehbar gelagerten Scheiben weiterdreht, so daß der Weitertransport des vom Aufzeichnungsmaterial abgelösten Bildempfangsmaterials zur Fixiereinrichtung bei stillstehender Trommel fortgesetzt werden kann.ίο Momentarily in the area of the cover on the rotatable supported disks For example, after the image transfer is complete, the drum with the Recording material sheet are stopped while the image transfer roller, for example, together continues to rotate with a separating tape on the rotatably mounted disks, so that the further transport of the Image receiving material detached from the recording material to the fixing device with the drum stationary can be continued.

Die Erfindung wird nachstehend anhand der Beschreibung eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnung näher erläutert Es zeigtThe invention is described below with reference to the description of an exemplary embodiment Explained in more detail on the drawing It shows

F i g. 1 einen Längsschnitt eines elektrofotografischen Kopiergeräts,F i g. 1 is a longitudinal section of an electrophotographic copier;

Fig.2 eine perspektivische Darstellung einer Aufzeichnungstrommel, 2 shows a perspective view of a recording drum,

F i g. 3 einen Längsschnitt der eingebauten Aufzeichnungstrommel,
F i g. 4 eine perspektivische Ansicht zur Darstellung der Beziehung zwischen der Aufzeichnungstrommel und der Bildübertragungswalze undF i g. 3 shows a longitudinal section of the built-in recording drum,
F i g. 4 is a perspective view showing the relationship between the recording drum and the image transfer roller and FIG

Fig.5 einen Schnitt der in Fig.4 dargestellten Anordnung.
Das Kopiergerät gemäß F i g. 1 besitzt eine Aufzeichnungstrommel 7, die ein elektrofotografisches Aufzeichnungsmaterialblatt 8 aus einer isolierenden Schicht, einer fotoleitfähigen Schicht und einer isolierenden Trägerschicht aufweist, die in der genannten Reihenfolge aufeinandergeschichtet sind. LJm die sich in der angegebenen Pfeilrichtung drehende Aufzeichnungstrommel 7 herum sind ein Primärlader 9, eine Einrichtung 10 zum Laden und gleichzeitigen bildmäßigen Belichten, eine Totalbelichtungslampe 11, eine Entwicklungseinrichtung 12, ein dritter Lader 13, eine Bildübertragungseinrichtung 14 und eine Reinigungseinrichtung 15 in der genannten Reihenfolge angeordnet. FIG. 5 shows a section of the arrangement shown in FIG.
The copier according to FIG. 1 has a recording drum 7 which has an electrophotographic recording material sheet 8 composed of an insulating layer, a photoconductive layer and an insulating carrier layer, which are stacked on top of one another in the order mentioned. Around the recording drum 7 rotating in the indicated arrow direction are a primary charger 9, a device 10 for charging and simultaneous imagewise exposure, a total exposure lamp 11, a developing device 12, a third charger 13, an image transfer device 14 and a cleaning device 15 in the order named arranged.

Der Primärlader 9 setzt das Aufzeichnungsmaterialblatt einer Gieichstromkoronaentladung aus, wodurch dieses positiv oder negativ geladen wird. Anschließend wird das Aufzeichnungsmaterialblatt 8 mittels der Einrichtung 10 einer Gieichstromkoronaentladung entgegengesetzter Polarität oder einer Wechselstrorr.-koronaentladung und gleichzeitig einer bildmäßigen Belichtung ausgesetzt, so daß ein der Vorlage entsprechendes Ladungsbild auf dem Aufzeichnungsmaterialblatt ausgebildet wird. Zur Vergrößerung des Kontrastes des elektrostatischen Ladungsbildes wird das Aufzeichnungsmaterialblatt 8 anschließend mittels der Totalbelichtungslampe 11 einer gleichmäßigen Belichtung unterworfen. Das so erzeugte Ladungsbild wird in der Entwicklungseinrichtung 12 mittels Toner bestimmter Polarität entwickelt, was mit einer Fellbürsten-, Magnetbürsten-, Kaskaden- oder Flüssigentwicklung geschehen kann.The primary charger 9 subjects the recording material sheet to a direct current corona discharge, whereby this is charged positively or negatively. Then the recording material sheet 8 is by means of Device 10 of a direct current corona discharge of opposite polarity or an alternating current corona discharge and at the same time exposed to an imagewise exposure, so that one of the original corresponding charge image is formed on the recording material sheet. To enlarge the The recording material sheet 8 is then used to contrast the electrostatic charge image the total exposure lamp 11 subjected to a uniform exposure. The charge image created in this way is developed in the developing device 12 by means of toner of a certain polarity, which is achieved with a fur brush, Magnetic brush, cascade or liquid development can be done.

Um die Übertragung des Tonerbilds auf Bildempfangsmaterial in Form von Kopierpapier P in der Bildübertragungseinrichtung !4 zu erleichtern, wird esIn order to facilitate the transfer of the toner image to the image receiving material in the form of copy paper P in the image transfer device! 4, it becomes

einer Koronaentladung mit Hilfe des dritten Laders 13 ausgesetzt Nach der Übertragung des Bildes wird der auf dem Aufzeichnungsmaterialblatt verbliebene Toner mit Hilfe der Reinigungswalze t6 der Reinigungseinrichtung 15 entferntsubjected to a corona discharge by means of the third charger 13. After the transfer of the image, the Toner remaining on the recording material sheet with the aid of the cleaning roller t6 of the cleaning device 15 away

Das Kopiergerät besitzt darüberhinaus eine Zuführeinrichtung 17,18 für die Vorlagen, eine Projektionseinrichtung 34 bis 40 zum Projizieren des Vorlagenbildes auf das Aufzeichnungsmaterialblatt 8, eine Zuführeinrichtung 78 bis 82 für das Kopierpapier, eine to Trenneinrichtung 47, 49 zum Abtrennen eines Kopierpapiers vom Aufzeichnungsmaterialblatt und eine Fixiereinrichtung 55 zum Fixieren des auf das Kopierpapier übertragenen Tonerbilds.The copier also has a feed device 17, 18 for the templates, a projection device 34 to 40 for projecting the template image onto the recording material sheet 8, a feed device 78 to 82 for the copy paper, a to Separating means 47, 49 for separating a copy paper from the recording material sheet and a Fixing device 55 for fixing the toner image transferred onto the copy paper.

Wie die Fig.2 und 5 zeigen, besitzt die Aufzeich- is nungstrommel 7 eine parallel zur Trommelachse verlaufende Ausnehmung 7\, die durch Schnittflächen 7i und 73 gebildet ist Beide Enden des Aufzeichnungsmaterialblatts 8 werden, wie in Fig.2 gezeigt ist durch Haltplatten 8t und 82 festgehalten. Nachdem das Aufzeichnungsmaterialblatt 8 um die zylindrische Oberfläche der Aufzeichnungstrommel 7 gelegt ist, werden in den Halteplatten 8, und 82 vorgesehene Bohrungen 83 an einem Ende des Aufzeichnungsmaterialblatts 8 auf Haltestifte 42 aufgesetzt die in die Schnittfläche 73 der Aufzeichnungstrommel 7 eingesetzt sind, während eine Feder 43, deren Enden fest mit den Halteplatten 81 und 82 des anderen Endes des Aufzeichnungsmaterialblatts 8 verbunden sind, in einen Haltestift 44 eingehakt wird, der in der Schnittfläche 7i des Aufzeichnungsmaterialblatts 8 verankert ist Auf diese Weise wird das Aufzeichnungsmaterialblatt 8 sicher auf der Aufzeichnungstrommel 7 in der richtiger Lage festgehalten. Selbst dann, wenn sich das Aufzeichnungsmaterialblatt in Folge von Temperaturänderungen ausdehnt oder zusammenzieht, wird es infolge der Feder 43 stets in dichter Berührung mit der Trommeloberfläche gehalten. Außerdem kann das Aufzeichnungsmaterialblatt sehr leicht ausgetauscht werden. Hierzu wird eine an der Aufzeichnungstrommel <*o 7 befestigte, staubdichte Abdeckung 125, die die Ausnehmung 7| der Aufzeichnungstrommel 7 abdeckt, entfernt.As the Figures 2 and 5 show the Aufzeich- has is drying drum 7 an axis extending parallel to the drum axis recess 7 \, which is formed by cutting surfaces 7i and 7 3 Both ends of the recording material sheet 8 are, as shown in Figure 2 by stop plates 8 t and 82 recorded. After the sheet of recording material is wound around the cylindrical surface of the recording drum 7, 8 are in the holding plates 8, and 8 2 provided holes 83 placed at one end of recording material sheet 8 on the support pins 42 of the recording drum 7 are inserted into the sectional area of 7 3, while a Spring 43, the ends of which are fixedly connected to the retaining plates 81 and 82 of the other end of the recording material sheet 8, is hooked into a retaining pin 44 which is anchored in the cut surface 7i of the recording material sheet 8 held in the correct position. Even if the recording material sheet expands or contracts as a result of temperature changes, it is always kept in close contact with the drum surface due to the spring 43. In addition, the recording material sheet can be exchanged very easily. For this purpose, a dust-tight cover 125 attached to the recording drum 7, which covers the recess 7 | the recording drum 7 covers, removed.

An beiden Seiten der Aufzeichnungstrommel 7 befinden sich koaxial versetzte Scheiben 45 und 46, die auf der Trommelwelle 103 derart gelagert sind, daß sie unabhängig voneinander drehbar sind. Ein Paar Führungsrollen 48, die an beiden Stirnseiten der Reinigungswalze 16 befestigt sind, berühren die Scheiben 45 und 46. In gleicher Weise rollen die stirnseitigen Ränder einer Bildübertragungswalze 47, die etwas langer als die axiale Abmessung der Trommel 7 ist, auf den Scheiben 45 und 46 ab, wie dies in den F i g. 4 und 5 gezeigt ist Der Durchmesser der Scheiben 45 und 46 ist gleich dem der Aufzeichnungstrommel 7 einschließlich des über sie gespannten Aufzeichnungsmaterialblatts 8, so daß die Übertragungswalze 47 fest gegen das Aufzeichnungsmaterialblatt 8 gedrückt wird.On both sides of the recording drum 7 there are coaxially offset disks 45 and 46, the are supported on the drum shaft 103 so that they are rotatable independently of each other. A couple Guide rollers 48, which are attached to both ends of the cleaning roller 16, touch the Disks 45 and 46. In the same way, the front edges of an image transfer roller 47 roll, which is slightly longer than the axial dimension of the drum 7, on the disks 45 and 46, as shown in FIGS F i g. 4 and 5, the diameter of the disks 45 and 46 is the same as that of the recording drum 7 including the sheet of recording material stretched over them 8 so that the transfer roller 47 is pressed firmly against the recording material sheet 8.

Ein das Kopierpapier vom Aufzeichnungsmaterialblatt 8 ablösendes Trennband 49 ist über 180° um die Übertragungswalze 47 herumgeschlungen und durch Rollen 50 bis 54 derart geführt daß es zusammen mit der Übertragungswalze 47 bewegt wird. Es ist ersichtlich, daß das Trennband 49 von den Rollen 50 bis 54 aus der Bewegungsbahn des Kopierpapiers -.ysgelerikt wird.A separating tape 49 detaching the copy paper from the recording material sheet 8 is 180 ° around the Transfer roller 47 wrapped around and guided by rollers 50 to 54 such that it is together with the Transfer roller 47 is moved. It can be seen that the release tape 49 from the rollers 50 to 54 from the Trajectory of the copy paper -.ysgelerikt.

Wenn sich das Aufzeichnungsmateruibiatt 8 auf der Aufzeichnungstrommel 7 bei der Trommeldrehung von der Übertragungswalze 47 entfernt, wie es in F i g. 5 angedeutet ist so bildet sich ein Spalt zwischen der Übertragungswalze 47 und der Außenfläche der Abdeckung 125, da lemere gegenüber der Umfangsfläche der Scheiben 45 und 46 zurückgesetzt ist Die Übertragungswalze wird dann also nur von den frei drehbar gelagerten Scheiben 45 und 46 abgestützt. Selbst wenn also die Aufzeichnungstrommel 7 stillgesetzt wird, wird die Übertragungswalze 47 mit dem Trennband 49 weitergedreht so daß das Kopierpapier P sicher in die Fixiereinrichtung 55 weitergefördert werden kann. Diese Möglichkeit einer Weiterdrehung von Übertragungswalze 47 und Trennband 49 bei stillstehender Aufzeichnungstrommel 7 verhindert zugleich eine örtliche Erhitzung der Walze und des Trennbands durch die Fixiereinrichtung 55. Schließlich kann neben der Übertragungswalze auch die Zuführeinrichtung für das Kopierpapier bei stillgesetzter Aufzeichnungstrommel 7 weiterlaufen.When the recording material 8 on the recording drum 7 moves away from the transfer roller 47 as the drum rotates, as shown in FIG. 5 is indicated so a gap is formed between the transfer roller 47 and the outer surface of the cover 125, since lemere is set back from the peripheral surface of the disks 45 and 46.The transfer roller is then only supported by the freely rotatably mounted disks 45 and 46. Even if the recording drum 7 is stopped, the transfer roller 47 with the separating tape 49 is rotated further so that the copy paper P can be safely conveyed further into the fixing device 55. This possibility of further rotation of the transfer roller 47 and separating tape 49 when the recording drum 7 is at a standstill also prevents local heating of the roller and the separating tape by the fixing device 55. Finally, in addition to the transfer roller, the feed device for the copy paper can also continue to run when the recording drum 7 is stopped.

Hierzu 4 Blatt ZeichnungenFor this purpose 4 sheets of drawings

Claims (1)

Patentanspruch;Claim; Elektrofotografisches Kopiergerät mit einer ein Aufzeichnungsmaterialblatt tragenden Trommel, die eine axial verlaufende Ausnehmung in ihrer Oberfläche aufweist, innerhalb dsr die Enden des Aufzeichnungsmaterialblatts gehaltert sind und die mit Hilfe einer Abdeckung verschlossen ist, dadurch gekennzeichnet, daß an beiden Trommelstirnseiten frei drehbar gelagerte Scheiben (45, 46) vorgesehen sind, deren Durchmesser mit dem Durchmesser der Außenfläche des Aufzeichnungsmaterialblatts (8) auf der Trommel (7) übereinstimmt, und daß die Außenfläche der Abdeckung (125) gegenüber der Umfangsfläche der Scheiben (45,46) zurückgesetzt istAn electrophotographic copier having a drum carrying a sheet of recording material, the has an axially extending recess in its surface, within dsr the ends of the Recording material sheet are supported and which is closed with a cover, thereby characterized in that on both drum front sides freely rotatably mounted disks (45, 46) are provided, the diameter of which corresponds to the diameter of the outer surface of the recording material sheet (8) on the drum (7) coincides, and that the outer surface of the cover (125) is set back relative to the peripheral surface of the disks (45, 46)
DE2167138A 1970-12-29 1971-12-29 Electrophotographic copier Expired DE2167138C3 (en)

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DE2167138B2 DE2167138B2 (en) 1981-03-26
DE2167138C3 true DE2167138C3 (en) 1981-11-26

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DE2167104A Expired DE2167104C2 (en) 1970-12-29 1971-12-29 Electrophotographic copier
DE2165416A Expired DE2165416C3 (en) 1970-12-29 1971-12-29 Developing equipment for an electrophotographic apparatus
DE2166638A Expired DE2166638C3 (en) 1970-12-29 1971-12-29 Separating device for peeling off an image receiving material
DE2167139A Ceased DE2167139B1 (en) 1970-12-29 1971-12-29 Electrophotographic copier with swiveling part
DE2167138A Expired DE2167138C3 (en) 1970-12-29 1971-12-29 Electrophotographic copier

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DE2167104A Expired DE2167104C2 (en) 1970-12-29 1971-12-29 Electrophotographic copier
DE2165416A Expired DE2165416C3 (en) 1970-12-29 1971-12-29 Developing equipment for an electrophotographic apparatus
DE2166638A Expired DE2166638C3 (en) 1970-12-29 1971-12-29 Separating device for peeling off an image receiving material
DE2167139A Ceased DE2167139B1 (en) 1970-12-29 1971-12-29 Electrophotographic copier with swiveling part

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US (2) US3764208A (en)
DE (5) DE2167104C2 (en)

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Also Published As

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US3834808A (en) 1974-09-10
DE2167104C2 (en) 1982-08-12
DE2167138B2 (en) 1981-03-26
US3764208A (en) 1973-10-09
DE2166638B2 (en) 1980-01-03
DE2166638C3 (en) 1980-09-04
DE2165416A1 (en) 1972-07-27
DE2167139B1 (en) 1981-02-05
DE2165416B2 (en) 1979-08-09
DE2166638A1 (en) 1974-12-19
DE2165416C3 (en) 1980-08-14

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