EP0713157B1 - Vorrichtung und Verfahren zum Drucken - Google Patents

Vorrichtung und Verfahren zum Drucken Download PDF

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Publication number
EP0713157B1
EP0713157B1 EP96100129A EP96100129A EP0713157B1 EP 0713157 B1 EP0713157 B1 EP 0713157B1 EP 96100129 A EP96100129 A EP 96100129A EP 96100129 A EP96100129 A EP 96100129A EP 0713157 B1 EP0713157 B1 EP 0713157B1
Authority
EP
European Patent Office
Prior art keywords
printing paper
feeding
image
paper
cut sheet
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 - Lifetime
Application number
EP96100129A
Other languages
English (en)
French (fr)
Other versions
EP0713157A1 (de
Inventor
Shigehiro Hano
Yoshihiro Chujo
Takanobu Hagiwara
Eizo Kanaya
Yoshinobu Takatsuki.
Satoru Kato
Hajime Saegusa
Tetsuya Aiyama
Hiroyuki Aonuma
Shozo Yoshizawa
Naoki Kobayashi
Koichi Sugihara
Akihito Dobashi
Kazuhito Shimura
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.)
Toray Industries Inc
Original Assignee
Toray Industries 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 Toray Industries Inc filed Critical Toray Industries Inc
Priority to EP96100129A priority Critical patent/EP0713157B1/de
Priority to DE1992630677 priority patent/DE69230677T2/de
Priority claimed from EP19920113772 external-priority patent/EP0582741B1/de
Publication of EP0713157A1 publication Critical patent/EP0713157A1/de
Priority to HK98106681A priority patent/HK1007473A1/xx
Application granted granted Critical
Publication of EP0713157B1 publication Critical patent/EP0713157B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • G03G15/6517—Apparatus for continuous web copy material of plain paper, e.g. supply rolls; Roll holders therefor
    • G03G15/6523—Cutting
    • 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
    • G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
    • G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
    • G03G15/163—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using the force produced by an electrostatic transfer field formed between the second base and the electrographic recording member, e.g. transfer through an air gap
    • G03G15/1635—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using the force produced by an electrostatic transfer field formed between the second base and the electrographic recording member, e.g. transfer through an air gap the field being produced by laying down an electrostatic charge behind the base or the recording member, e.g. by a corona device
    • G03G15/1645—Arrangements for controlling the amount of charge
    • 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
    • G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
    • G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
    • G03G15/2007—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using radiant heat, e.g. infrared lamps, microwave heaters
    • G03G15/201—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using radiant heat, e.g. infrared lamps, microwave heaters of high intensity and short duration, i.e. flash fusing
    • 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
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00443—Copy medium
    • G03G2215/00447—Plural types handled
    • 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
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00443—Copy medium
    • G03G2215/00451—Paper
    • G03G2215/00455—Continuous web, i.e. roll
    • G03G2215/00459—Fan fold, e.g. CFF, normally perforated
    • 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
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00789—Adding properties or qualities to the copy medium
    • G03G2215/00814—Cutter

Definitions

  • This invention relates to a printing apparatus according to the preamble part of claim 1 as well as to a printing method according to the preamble part of claim 14.
  • the electrophotographic apparatus disclosed in the above U.S.P. documents includes a common paper feeding path for feeding one of printing papers of cut sheet and continuous paper and effects the electrophotographic process for the printing paper in the process feeding the printing paper along the common paper feeding path. That is, while the printing paper is fed along the common paper feeding path, a toner image is transferred to the printing paper when it comes to an image transferring position which is previously determined on the common feeding path and then the toner image is fixed on the printing paper in the fixing position which is defined on the downstream side of the transferring position.
  • paths for supplying cut sheet and continuous paper to the common feeding path are different and methods for supplying paper in the respective supplying paths are different from each other.
  • a print starting command signal is generated and cut sheet or continuous paper is fed to the transferring position on the common feeding path via the corresponding paper supplying path
  • transferring timings at which the cut sheet and continuous paper are fed to the transferring position after generation of the print starting command signal are different from each other.
  • the quality of fixing may be deteriorated unless uniform light energy is applied to the toner image on the printing paper or to the printing surface.
  • EP 0 362 842 A1 describes an electrophotographic recording apparatus and method recording an image on a recording paper either a cut recording sheet or a continuous recording sheet.
  • US 5,105,227 describes a method of and an apparatus for supplying a record medium to an electrophotographic printer.
  • the printer includes a photosensitive means on which are formed electrostatic latent images concerning with images to be printed on the basis of images data.
  • the latent images are then converted by applying toner to the latent images to sensible images which are then transferred to the record medium at a transfer position where the sensible images are in opposition to a printable zone of the record medium to form printed images.
  • a time from starting motion of the photosensitive means to a moment when the sensible images have arrived at the transfer position is predetermined and the record medium is supplied into the printer so that a leading end of the printable zone of the record medium arrives at the transfer position when the sensible images have arrived at the transfer position.
  • the record medium is supplied into the printer so that the record medium is spaced from the photosensitive means by a distant sufficient toner from clinging to the record medium means until the sensible images arrive at the transfer position.
  • an electrophotographic apparatus roughly includes paper stacking sections 2 and 4, feeding section 6, printing section 8, and paper ejecting section 10.
  • the stack section 2 is arranged in an upper position and the stack section 2 has a tray 12.
  • a large number of sheets of cut paper of cut sheets C are stacked and stored in the tray 12.
  • a take-out roller 14 is disposed above the tray 12 and is positioned near the feeding section 6. Further, the take-out roller 14 is set in contact with one of the cut sheets C which lies in the topmost position in the tray 12. Therefore, when the take-out roller 14is rotated, the cut sheet in the tray 12 is sequentially taken out one at a time and supplied towards the succeeding stage or the feeding section 6.
  • the other stack section 4 is disposed below the stack section 2 and the stack section 4 also has a tray 16.
  • Fanfold paper F is set in a folded form in the tray 16.
  • An end sensor 18 which is an optical sensor having a light emitting element and a light receiving element is disposed above the tray 16.
  • the feeding section 6 receives printing paper supplied from a selected one of the stack sections 2 and 4 and supplies the received printing paper towards the printing section 8. That is, the feeding section 6 has a pair of separation rollers 20 disposed on the side of the stack section 2.
  • the separation rollers 20 are disposed near the take-out roller 14 and rotated in the opposite directions. Therefore, as described before, when the take-out roller 14 is rotated, the cut sheet C taken out from the tray 12 passes through between the separation rollers 20.
  • the separation rollers 20 permit only one of cut sheet C supplied from the tray 12 to pass through therebetween. Thus, the cut sheet C is supplied to the feeding section 6 one at a time.
  • a pair of feed rollers 22 are disposed on the downstream side of the separation rollers 20 with respect to the feeding direction of the cut sheet C and are disposed in the boundary between the feeding section 6 and the printing section 8. Further, a register guide 24 formed in a plate-like form, a pair of register rollers 26 and a pair of introducing guides 28 are arranged in this order as viewed from the separation roller 20 side between the separation rollers 20 and the feeding rollers 22.
  • the cut sheet C is fed from between the separation rollers 20, the front end of the cut sheet C strikes against the paired register rollers 26 and the feed of the cut sheet is temporarily stopped. Therefore, the cut sheet C is bent with the rear end portion thereof pressed against the register guide 24, and as a result, the feeding posture of the cut sheet C is corrected so that the front end of the cut sheet C may be set parallel to the axial line of the paired register rollers 26. That is, in this time, the so-called register correction of the cut sheet C is effected.
  • the cut sheet C is fed through between the paired register rollers 26, and is guided towards the feeding rollers 22 by the paired introducing guides 28, and then supplied to the printing section 8 by means of the feeding rollers 22.
  • An end sensor 30 is arranged between the register rollers 26 and the feeding rollers 22. Also, the end sensor 30 has a light emitting element and a light reception element which are disposed with the feeding path of the cut sheet C, that is, introducing guides 28 disposed therebetween.
  • a tractor unit 32 is disposed in the lower position of the feeding section 6.
  • the fanfold paper F stored in the tray 16 passes through between the light emitting element and the light reception element of the end sensor 18 and is guided to the tractor unit 32.
  • the tractor unit 32 has a pair of tractor belts and the feeding crawls of the tractor belt are inserted into the feed holes formed on both side portions of the fanfold paper F. Therefore, the tractor unit 32 feeds the fanfold paper F towards the printing section 8 by sequentially inserting the feeding crawls into the feed holes while the tractor belt is being driven.
  • a rotary encoder 34 is mounted on the driving shaft of the tractor unit 32 and electrically connected to a counter 36.
  • the counter 36 accumulatively adds the number of pulses output from the rotary encoder 34 to the count thereof, and when the driving shaft of the tractor unit is rotated in the opposite direction, the counter 36 subtracts the number of pulses from the count thereof.
  • the count thereof or the accumulated value of the number of pulses indicates the traveling distance of the fanfold paper F supplied from the tractor unit 34 to the printing section 8.
  • an end sensor 38 is disposed immediately front side of the tractor unit 32 with respect to the feeding direction of the fanfold paper F and the light emitting element and light reception element of the end sensor 38 are arranged with the feeding path of the fanfold paper F disposed therebetween.
  • a photosensitive drum 40 is disposed on the side near the feeding section 6 and rotated at a constant speed in the counterclockwise direction in Fig. 1.
  • a charging unit 42, exposure unit 44, developing unit 46, transferring/de-electrifying unit 48, peeling crawl 50 and cleaning unit 52 are arranged in this order around the photosensitive drum 40 in the rotating direction from a position directly above the photosensitive drum 40.
  • the exposure unit 44 includes an LED array having light emitting diodes (LEDs) arranged in a row and the LED array emits a light beam towards the photosensitive surface so as to form an electrostatic latent image on the photosensitive surface according to image data supplied from a computer.
  • LEDs light emitting diodes
  • the electrostatic latent image formed on the photosensitive surface is developed into a toner image by the developing unit 46. After this, the toner image is transferred to the printing paper which is attached to and fed on the photosensitive drum 40 by means of a transfer section 48a of the transferring/de-electrifying unit 48.
  • the printing paper is applied with an A.C. voltage from a de-electrifying section 48b of the transferring/de-electrifying unit 48 and charges of the printing paper are rapidly discharged. As a result, the printing paper is adequately peeled from the photosensitive drum 40. Thereafter, the remaining toner on the photosensitive surface of drum 40 is removed by means of the cleaning unit 52.
  • the peeling crawl 50 functions to prevent the printing paper which is now fed on the photosensitive drum 40 from being wound on the photosensitive drum 40.
  • the printing paper is either the cut sheet or fanfold paper respectively supplied from the stacking section 2 or 4.
  • a confluence guide 54 is disposed between the feeding section 6 and the photosensitive drum 40 and is shown in detail in Fig. 2.
  • the confluence guide 54 has a pair of guide plates 56 and 58 respectively disposed in the upper and lower portions and a space between the guide plates defines part of the feeding path of the printing paper.
  • the upstream side end of the upper guide plate 56 which lies near the feed rollers 22 is bent in an upward direction and the upstream side end of the lower guide plate 58 which lies near the end sensor 38 is bent in a downward direction.
  • an inlet port defined between the upstream side ends of the paired guide plates 56 and 58 is fully opened in the vertical direction.
  • the cut sheet C which has passed through between the feed rollers 22 is guided by the upstream side end of the upper guide plate 56 and fed into a space between the guide plates 56 and 58, and the fanfold paper F which has been fed from the tractor unit 32 is guided by the upstream side end of the lower guide plate 58 and fed into between the guide plates.
  • the lower guide plate 58 is made longer than the upper guide plate 56 and the downstream side end of the lower guide plate 58 is set near the transferring position P0 of the photosensitive drum 40, that is, near the transfer section 48a. Further, the downstream side end of the lower guide plate 58 is bent in a convex form towards the photosensitive surface so as to be close to the photosensitive surface of the photosensitive drum 40. Therefore, when a line segment which contains the downstream side end of the lower guide plate 58 and is tangent to the photosensitive surface is considered, an angle ⁇ made by the line segment and the flat central portion of the lower guide plate 58 is set so that the printing paper may be adequately and forcedly guided towards the transferring position P0.
  • the downstream side end of the upper guide plate 56 is formed in a triangular form projecting towards the photosensitive drum 40 and an angle made by part of the downstream side end of the upper guide plate which lies on the side of the photosensitive drum 40 and the central portion of the lower guide plate 58 is also set to ⁇ .
  • a belt conveyer 60 is disposed near the photosensitive drum 40 and horizontally extends in a direction from a position near the transferring position P0 to the ejecting section 10.
  • the belt conveyer 60 includes rollers 62 and 64 which are disposed in different positions in the feeding direction of the printing paper and a plurality of conveyer belts 66 stretched between the rollers 62 and 64.
  • each of the conveyer belts 66 has a large number of suction holes 67 and a pair of suction devices 68 are disposed between the forward movement belt section and reverse movement belt section of the conveyer belts 66 in different positions in the feeding direction.
  • the suction devices have suction fans (not shown) disposed therein and the suction fans cause air flow from the upper side towards the lower side.
  • the printing paper which has passed the photosensitive drum 40 is fed towards the succeeding stage ejecting section 10 by driving the conveyer belt 66 while it is attached to the conveyer belt 66 of the conveyer by suction force.
  • a scuff roller unit 70 is disposed on the downstream side of the belt conveyer 60, that is, between the belt conveyer 60 and the ejecting section. As shown in Fig. 3, the scuff roller unit 70 has a supporting roller 72 which is set in the same level as the roller 64 of the belt conveyer 60 and extends in parallel with the roller 64. A plurality of free rollers 74 are disposed directly above the supporting roller 72 and arranged along the supporting roller. The free rollers 74 are rotatably mounted on the roller shafts which are supported by a bracket (not shown). A plurality of compression coil springs 76 are respectively disposed between the bracket and two ends of each of the roller shafts and the compression coil springs 76 bias the corresponding roller shafts, that is, free rollers 74 towards the supporting roller 72.
  • a dual driving pulley 80 is mounted on the roller shaft 78 of the supporting roller 72, and one of the pulley portions of the driving pulley 80 is coupled to an output pulley of an electric motor 82 (Fig. 16) via a driving belt 84 and the other pulley portion is coupled to a pulley 86 disposed on the belt conveyer 60 side via a transmission belt.
  • the pulley 86 is mounted on the roller shaft of the roller 64. Therefore, the driving force of the electric motor 82 is transmitted to the driving pulley 80 to rotate the supporting roller 72, and at the same time, the driving force is transmitted to the roller 64 of the belt conveyer via the driving pulley 80 to drive the conveyer belt 66 in the preset direction.
  • the supporting roller 72 has the same diameter as the roller 64 of the belt conveyer 60 side, the circumferential speed of the supporting roller 72 and the traveling speed or feeding speed of the conveyer belt 66 are set equal to each other.
  • the portion of the perforation line may smoothly pass between the supporting roller 72 and the free rollers 74 because the free rollers 74 elastically press the fanfold paper against the supporting roller 72.
  • the fanfold paper F can be fed at a constant speed irrespective of the presence of the perforation lines.
  • the confluence guide 54, transferring/de-electrifying unit 48 and belt conveyer 60 are supported on a separating device 90 which is shown in Fig. 5.
  • the separating device 90 has a supporting frame 92 disposed below the photosensitive drum 40.
  • the supporting frame 92 has a pair of side plates 94 which are disposed to face each other and separated from each other in an axial direction f the photosensitive drum 40.
  • the side plates 94 extend from the confluence guide 54 to the end of the belt conveyer 60.
  • a shaft 96 is provided on one of the end portions of the supporting frame 92 which lies on the upstream side with respect to the feeding direction of the printing paper.
  • the shaft 96 is disposed to extend across the side plates 94 and rotatably mounted at both ends on the side plates 94.
  • a pair of holder plates 98 are mounted on the shaft 96 and separately disposed to face each other in the supporting frame 92.
  • the confluence guide 54 and transferring/de-electrifying unit 48 are disposed across the holder plates 98 and fixed on the upper portions of the holder plates 98.
  • Rectangular openings 100 are formed in the central portions of the holder plates 98 and a roller shaft 102 is disposed to extend through the openings 100. Both ends of the roller shaft 102 are rotatably mounted on the side plates 94 of the supporting frame 92 and one of the ends is connected to a driving motor (not shown).
  • An eccentric roller 104 is mounted on the roller shaft 102 in the openings 100 and is rotatably disposed in the opening 100.
  • short links 106 which extend downwardly are each rotatably mounted at one end on a corresponding one of the holder plates 98 near the opening 100.
  • Long links 108 which are disposed below the belt conveyer 60 and extend towards the terminal end of the belt conveyer 60 are each rotatably coupled at one end with the lower end of a corresponding one of the short links 106.
  • the long link 108 is rotatably mounted at the other end thereof on the corresponding side plate 94 via a shaft 111.
  • Supporting arms 110 are rotatably mounted at the lower end thereof on the central portions of the long links 108.
  • the supporting arm 110 extends upwardly to the belt conveyer 60 and the upper end thereof is formed as a hook 112 which is engaged with a pin 114 projecting from the corresponding side frame of the belt conveyer 60.
  • the long links 108 and the supporting arms 110 are connected to each other by means of extension springs 116.
  • the extension springs 116 bias and rotate the corresponding supporting arms 110 in such a direction as to push the hooks 112 thereof towards the respective pins 114 and bias and rotate the long arms 108 in such a direction as to push one-side ends of the long arms 108 upwardly.
  • a guide roller 118 is rotatably mounted on the surface of the supporting arm 110 which lies on the belt conveyer 60 side and the guide rollers 118 can be moved along guide grooves 120.
  • the guide grooves 120 are formed in the side frames of the belt conveyer 60 and extend in the feeding direction of the printing paper.
  • each of the holder plates 98 is pushed into a raised position via the short links 106 by means of the long links 108 and set in the raised position, and the confluence guide 54 and transferring/de-electrifying unit 48 are set in the operative position which is near the photosensitive drum 40.
  • the belt conveyer 60 is supported in a horizontal position by means of the paired supporting arms 110.
  • the eccentric rollers 104 push the edges of the openings 100 in the holder plates 98 downwardly as indicated by two-dot-dash lines.
  • the paired holder plates 98 are rotated downwardly around the shaft 96 and the confluence guide 54 and the transferring/de-electrifying unit 48 are moved downwardly and separated from the photosensitive drum 40.
  • the downward movement of the holder plates 98 is converted to the rotational movement of the long links 108 via the short links 106. That is, the long links 108 are rotated downwardly around the shaft 111 against the spring force of the extension springs 116. With this rotational movement, the supporting arms 110 are also pushed downwardly and the belt conveyer 60 is rotated downwardly around the roller 64 which lies on the termination side and one of the end portions thereof lying on the upstream side is separated from the photosensitive drum 40.
  • the supporting arms 110 are rotated in a direction to release the engagement of the hooks 112 with the pins 114 lying on the belt conveyer 60 side, the supporting arms 110 rotate the belt conveyer 60 by a large angle via the guide roller 118 as indicated by two-dot-dash lines. As a result, the belt conveyer 60 is largely separated from the photosensitive drum 40 and occurrence of printing paper jam on the belt conveyer 60 may be easily removed.
  • a fixing unit 122 is disposed directly above the belt conveyer 60 and the fixing unit 122 is placed on the termination side of the belt conveyer 60.
  • the fixing unit 122 is shown in detail in Figs. 6 to 9.
  • the fixing unit 122 has a box-type lamp housing 124 and an opening 126 is formed in the bottom surface of the lamp housing 124, that is, in the surface which faces the printing paper fed by the belt conveyer 60.
  • the lamp housing 124 has a width larger than the width of the printing paper in the transverse direction of the belt conveyer 60.
  • a halogen lamp 128 for preheating and a flash lamp 130 made of a xenon lamp for fixing are disposed in the lamp housing 124 and arranged in this order from the upstream side in the feeding direction of the printing paper.
  • These lamps extend in the lengthwise direction of the lamp housing 124, that is, in the transverse direction of the belt conveyer 60 and two ends thereof are supported on the lamp housing 124 via a pair of holders 132 and 134.
  • reflecting plates 136 and 138 are disposed above the two lamps to cover the lamps. The reflecting plates are mounted on the lamp housing 124 by use of suitable mounting means (not shown).
  • the holder 132 which is one of the above paired holders includes a socket 140 attached to the lamp end portion and a supporting plate 142 for suspending the lamp end via the socket 140.
  • the socket 140 is formed in a stepped cylindrical configuration and formed of an electrically insulation material such as polyimide or ceramics which has a high heat-resisting property.
  • a mounting hole with which the lamp end portion is engaged is formed in the large-diameter portion of the socket 140 and the small-diameter portion thereof is formed to be inserted into a holding hole 144 of the supporting plate 142.
  • the supporting plate 142 is formed of a rectangular leaf spring and the holding hole 144 is formed in the central portion of the supporting plate 142 as is clearly shown in Fig.
  • the upper end portion of the supporting plate 142 is bent, set in close contact with the ceiling wall and attached to the ceiling wall by use of an attaching screw 146. Therefore, the supporting plate 142 can be suspended from the ceiling wall of the lamp housing 124. Also, the lower end portion of the supporting plate 142 is slightly bent in the same direction as the upper end portion thereof.
  • a slit 148 is formed in the supporting plate 142 to straightly extend from the holding hole 144 of the supporting plate to the bottom end thereof. Since a cord 150 extending from the socket 140 can be previously guided into the holding hole 144 via the slit 148 if the slit 148 is formed in the supporting plate 142, the socket or the lamp end portion can be inserted into the holding hole 144 without paying any attention to the presence of the cord.
  • the other holder has substantially the same construction as the holder described above, but a supporting plate 152 of the holder 134 is formed of a normal rigid metal plate instead of the leaf spring.
  • both end portions of the lamp are supported by means of the paired holders 132 and 134, the lamp can be elastically supported between the holders. Therefore, particularly when the lamp is a flash lamp and even if the lamp vibrates at the time of light emission thereof, the vibration is effectively alleviated by the elastic property of the supporting plate 142 made of the leaf spring, thereby preventing a large load from being applied to the bulb of the lamp. Further, since the supporting plate 152 of the other holder has high rigidity, the vibration of the lamp will not be amplified and can be rapidly attenuated. It is considered that the vibration of the flash lamp 130 is caused by air around the bulb which is rapidly heated and expanded at the time of light emission.
  • the lamp end portion can be removed from the holding hole 144 of the supporting plate 142, and as a result, the lamp can be removed from the paired holders. After this, a new lamp may be supported between the paired holders and thus the lamp can be replaced.
  • the opening 126 of the lamp housing 124 has a rectangular rim 154 whose internal edge portion projects downwardly and which is surrounded by a sponge member 156 formed of silicone rubber.
  • the sponge member 156 slightly projects downwardly from the rim 154.
  • the opening 126 is covered with a rectangular transparent glass plate 158 from the bottom side and the peripheral portion of the glass plate 158 is pressed against and fixed on the bottom surface of the lamp housing 124 via the sponge member 156 by means of a plurality of fittings.
  • the glass plate 158 is used to protect the halogen lamp 128 and flash lamp 130 on one hand and prevent toners and dusts from being attached to the lamps on the other.
  • the above fitting includes a cross metal fitting 160 and a pair of side metal fitting 162.
  • the cross metal fitting 160 is formed of a plate disposed to extend along one of the end sides of the glass plate 158 which lies on the upstream side with respect to the feeding direction of the printing paper and having a stepped portion in the feeding direction.
  • the cross metal fitting 160 is fixed on the bottom surface of the lamp housing 124 by means of a plurality of fitting screws 164 so as to hold the one-side end portion of the glass plate 158 between the bottom surface of the lamp housing 124 and the stepped portion of the cross metal fitting via the sponge member 156.
  • the paired side metal fitting 162 are disposed to respectively extend along both sides of the glass plate 158 which are set parallel to the feeding direction of the printing paper.
  • the side metal fitting 162 have substantially the same structure as the cross metal fitting 160 and are fixed on the bottom surface of the lamp housing 124 by means of a plurality of fitting screws 164 so as to hold corresponding one-side edge portions of the glass plate 158 between the bottom surface of the lamp housing 124 and the stepped portion of the side metal fitting via the sponge member 156.
  • a pair of auxiliary metal fitting 166 are disposed on both sides of the remaining side end portion of the glass plate 158.
  • the auxiliary metal fitting 166 are sufficiently smaller than the cross metal fitting 160 and side metal fitting 162, but have substantially the same cross sections as the latter metal fittings. Therefore, the remaining side end portion of the glass plate 158 is also held between the bottom surface of the lamp housing 124 and the paired auxiliary metal fitting 166 via the sponge member 156.
  • the paired auxiliary metal fitting 166 are separately disposed from each other with a distance sufficiently larger than the width of the printing paper, and therefore, when the printing paper is fed directly below the fixing unit 122 by the belt conveyer 60, the front end of the printing paper may freely pass through between the paired auxiliary metal fitting 166.
  • a paper guide 168 is attached to the end face of the lamp housing 124 which lies on the cross metal fitting side and the lower end portion of the paper guide 168 is formed to extend along the belt conveyer 60 and towards the downstream side of the belt conveyer 60 so as to be continuous with the lower end portion of the cross metal fitting 160. Therefore, when the printing paper has reached the fixing unit 122, the front end portion thereof is guided by the paper guide 168 and stably fed below the glass plate 158 and the front end portion of the printing paper will not be caught by the cross metal fitting 160.
  • Another paper guide 170 is attached to the bottom surface of the lamp housing 124 on the auxiliary metal fitting side and the paper guide 170 is formed to extend along the belt conveyer 60 towards the downstream side of the belt conveyer 60. Therefore, after the front end of the printing paper has passed below the glass plate of the fixing unit 122, the paper guide 170 guides the front end of the printing paper and ejects the front end to the exterior of the fixing unit 122 without fail.
  • the fixing unit 122 has cooling means for supplying cool air into the lamp housing 124 so as to prevent the halogen lamp 128 and flash lamp 130 from being overheated.
  • Fig. 10 shows the distribution of light energy applied to the printing paper in the feeding direction of the printing paper when flash light is emitted once from the flash lamp 130.
  • 70 to 80 % of the total light energy is concentrated on an area A2 which is the central portion of the area A1 and occupies 50 % of the area A1.
  • the above light energy distribution is obtained by adequately selecting the shapes of the reflecting plates 136 and 138. However, it is impossible to apply light energy which is uniform in the entire portion of the illumination area A1 only by use of the reflecting plates.
  • the number n of light emitting operations is set to a natural number of 1 or 2, and when the number n of light emitting operations is set to 2, light energy applied to the printing surface has a distribution characteristic E2 shown by broken lines in Fig. 11.
  • the distribution characteristic E2 the light energy applied to the printing surface significantly varies in the feeding direction of the printing paper. Therefore, when the above distribution characteristic is used, the output of the flash lamp is adjusted to set the level of light energy necessary for fixing to EL or EH.
  • toners on the printing surface explosively boil to deteriorate the quality of fixation or contaminate the printing paper and peripheral members with gas generated by decomposition of the toners.
  • the fixing strength of toners is weak and the toners tend to be removed from the printing surface.
  • the distribution characteristic E1 of light energy obtained in a case where the number n of light emitting operations is set to 1 is indicated by one-dot-dash lines in Fig. 11. Variation in the light energy of the distribution characteristic E1 is smaller than that of the distribution characteristic E2, but even in this case, the above problems cannot be solved.
  • the number n of light emitting operations is set to a value within a range of 1.2 to 1.8, and preferably, 1.3 to 1.7.
  • the distribution characteristic E1.44 of light energy obtained when the number n of light emitting operations is set 1.44 is indicated by a solid line in Fig. 11.
  • variation in the light energy is significantly suppressed in comparison with the cases of the distribution characteristics E1 and E2, and as a result, substantially uniform light energy can be applied to the entire area of the printing surface to be fed.
  • a cutting device 172 is disposed near the ejecting section 10 on the downstream side of the belt conveyer 60, and thus, the scuff roller unit 70 is placed between the cutting device 172 and the belt conveyer 60.
  • the cutting device 172 is shown in detail in Figs. 12 and 13.
  • the cutting device 172 has a hollow box-type beam 174 which is disposed on the supporting roller 72 side of the scuff roller unit 70, that is, below the feeding path of the printing paper and horizontally extends in a transverse direction of the feeding path.
  • Two end portions of the beam 174 project outwardly from the feeding path and a pair of pulleys 176 (only one of which is shown in the drawing) are horizontally arranged in the two end portions of the beam.
  • the shafts of the pulleys 176 extend upwardly and are rotatably supported on the beam 174, and the shaft of one of the pulleys further projects from the beam 174 and is coupled to a driving source.
  • a driving belt 178 is stretched over the paired pulleys 176 and the driving belt 178 can be reciprocally moved by forward and reverse rotations of the driving pulley 176.
  • part of the driving belt 178 which lies on the side of the scuff roller unit 70 is held between a pair of pinch plates 180 which are formed to extend along the driving belt 178 and are connected to each other by use of a plurality of connection bolts 182.
  • a cutter shaft 184 horizontally projects from the outside pinch plate, that is, one of the pinch plates which lies on the side of the scuff roller unit 70.
  • the proximal end of the cutter shaft 184 is supported on the central portion of the outside pinch plate 180 and the distal end thereof projects to the exterior of the beam 174 through a guide slot 186 of the beam 174.
  • the guide slot 186 is formed in the side wall of the beam 174 and extends in the lengthwise direction of the beam 174.
  • a cutter disk 188 is rotatably attached to the distal end of the cutter shaft 184 via a holder sleeve 187.
  • the cutter disk 188 has such a diameter as to slightly project upwardly from the feeding path of the printing paper and a constant thickness t which is adequately determined to break the perforation line of the fanfold paper F.
  • a pair of guide wheels 190 are disposed on both sides of the cutter disk 188 in the lengthwise direction of the beam 174.
  • Each of the guide wheels 190 has a pair of pinch disks 192 sandwiching the side wall of the beam 174 and a wheel section 194 which connects the pinch disks 192 to each other and is disposed to freely slide along the guide slot 186.
  • a wheel shaft projects from the pinch disk 192 which is disposed inside in the beam 174. Like the cutter shaft 184, the wheel shaft is supported on the outside pinch plate 180.
  • the cutter disk 188 reciprocally moves along the side wall of the beam 174. Since, at this time, each of the guide wheels 190 is moved with the side wall of the beam 174 held between the paired pinch disks 192 and the wheel section 194 guided by the guide slot 186 in the side wall, the orientation of the cutter disk 188 can be kept unchanged.
  • a plurality of holding pads 196 are disposed above the beam 174 and arranged at a regular interval along the lengthwise direction of the beam 174. In Fig. 12, only one holding pad 196 is shown.
  • Each of the holding pads 196 is formed of rubber in a cubic form and connected to a lifting/lowering means (not shown) via a holder plate 198.
  • a pair of guide plates 200 and 201 are arranged between the holding pads 196 and the beam 174 with the feeding path of the printing paper disposed therebetween in the vertical direction and openings 202 are formed in the guide plate 200 which is the upper one of the above paired guide plates in position corresponding to the holding pads 196.
  • the opening 202 has a size such that the holding pad 196 can be inserted therein.
  • the upper and lower guide plates 200 and 201 are formed to extend from the printing section 8 into the ejecting section 10, and the upper guide plate 200 is bent upwardly in the ejecting section 10 and the lower guide plate 201 is bent downwardly in the ejecting section (refer to Fig. 1).
  • Another upper guide plate 204 is disposed above the belt conveyer 60 on the upstream side of the guide plate 200 and the upper guide plate 204 is formed to extend from the terminal end of the belt conveyer 60 and over the scuff roller unit 70. Therefore, openings 206 are formed in the upper guide plate 204 in positions corresponding to the free rollers 74 of the scuff roller unit 70 and thus the free rollers 74 are respectively set in contact with the supporting rollers 72 via the corresponding openings 206. Further, a lower guide plate 208 is disposed below the feeding path between the scuff roller unit 70 and the cutting device 172.
  • a preset gap is provided between the lower guide plates 208 and 201 to permit the movement of the cutter disk 188.
  • a detector 210 for detecting passage of the printing paper is disposed between the scuff roller unit 70 and the cutting device 172.
  • the cutting device 172 may use a triangular plate 212 as shown in Fig. 14 instead of the cutter disk 188.
  • a first ejection gate 214 is disposed between the upper guide plate 200 and the lower guide plate 201 in the ejecting section 10.
  • the first ejection gate 214 can be rotated around a supporting shaft 216 according to whether the printing paper to be fed is cut paper C or fanfold paper F.
  • a second ejection gate 218 and a paper ejecting tray 220 are sequentially arranged on the downstream side of the first ejection gate 214.
  • the second ejection gate 218 is also mounted to rotate around a supporting shaft 222 and the paper ejecting tray 220 is mounted to rotate around a supporting shaft (not shown).
  • the upper guide plate 200 is connected to an ejecting path for the cut sheet C and the ejecting path extends upwardly and is bent towards the belt conveyer 60 so as to be open to the upper surface of the electrophotographic apparatus.
  • the first and second ejection gates 214 and 218 are rotated downwardly and set to the respective lowered positions as indicated by solid lines in Fig. 15.
  • the distal end portion of the first ejection gate 214 crosses the lower guide plate 201 to close the path extending along the lower guide plate 201 and open a path extending along the upper guide plate 200.
  • the second ejection gate 218 opens the path extending along the upper guide plate 200.
  • the cut sheet C fed from the belt conveyer 60 is guided by the first and second ejection gates 214 and 218 along the upper guide plate 200 and fed in the upward direction as shown by arrows of solid lines in Fig. 15.
  • the cut sheet C is fed along the ejecting path and ejected towards the upper surface of the apparatus.
  • the cut sheet C is ejected from the apparatus to the exterior with the printed surface facing down, that is, in the so-called face-down state.
  • the second ejection gate 218 is rotated around the supporting shaft 222 upwardly from the lowered position indicated by the solid line in connection with the paper ejection tray 220 and set to the raised position indicated by two-dot-dash lines.
  • the cut sheet C is fed through between the upper guide plate 200 and the first ejection gate 214, then straightforwardly fed to the paper ejecting tray 220 as indicated by an arrow of broken lines and received onto the paper ejecting tray 220.
  • an auxiliary guide plate 224 is disposed between the first ejection gate 216 and the paper ejecting tray 220. In this case, the cut sheet C is ejected onto the paper ejecting tray 220 with the printed surface facing up, that is, in the so-called face-up state.
  • the first ejecting gate 214 When fanfold paper F is used as the printing paper, the first ejecting gate 214 is rotated from the lowered position indicated by the solid line to the raised position. In the raised position, the distal end of the first ejection gate 214 crosses the upper guide plate 200 to close the path extending along the upper guide plate 200 and open the path extending along the lower guide plate 201. Therefore, the fanfold paper F fed is guided along the lower guide plate 201 and fed downwardly as indicated by an arrow of one-dot-dash lines.
  • the fanfold paper F passes on the paper ejecting tray 220 and can be ejected from an ejecting port of the electrophotographic apparatus if the second ejection gate 218 is set in the raised position. In this case, if a succeeding stage processing device is connected to the ejecting port of the apparatus, the printed fanfold paper F may be continuously supplied from the apparatus to the processing device.
  • a paper ejecting stacker 226 is disposed in the lower portion of the ejecting section 10.
  • the fanfold paper F guided along the lower guide plate is sequentially folded along the perforation lines and stacked on the paper ejecting stacker 226.
  • a flat belt 228 and a chain belt 230 are disposed to face each other between the paper ejecting stacker 226 and the lower guide plate 201.
  • a plurality of crawls 232 are disposed at a regular interval and project from the flat belt 228.
  • the crawls 232 of the flat belt 228 and the chain belt 230 cooperate with each other to sequentially fold the fanfold paper F at each perforation line.
  • the paper ejecting stacker 226 can be lowered according to the height of the stack of the fanfold paper F.
  • the feed roller 22 and photosensitive drum 40 are rotated by means of the same electric motor 83 and the suction device 68 is driven at the same time that the belt conveyer 60 is driven.
  • the separation device 90 is set in the raised operative state in which the confluence guide 54, the transferring/de-electrifying unit 48 and the belt conveyer 60 are set in the operative position, that is, they are pushed upwardly to the printing position, and the fanfold paper F is set in a state in which the front end thereof is pushed back to the tractor unit 32. Further, in the ejecting section 10, the first ejection gate 214 is set in the lowered position and the second ejection gate 218 is set in either the lowered position or the raised position.
  • the take-out roller 14 and the separation rollers 20 are rotated to take out one sheet of cut paper C from the tray 12 in the stacking section 2.
  • the register-correction is effected for the cut sheet C by the register rollers 26 and the cut sheet C is fed from the register rollers 26 into the introducing guides 28 at a constant speed.
  • the cut sheet C fed into the introducing guides 28 is further fed through the confluence guide 54 by means of the feed rollers 22 and then supplied to the transferring position P0 of the photosensitive drum 40.
  • the register rollers 26 are rotated at the same circumferential speed as the feed rollers 22.
  • the end sensor 30 detects the passage of the front end of the cut sheet C and outputs a detection signal.
  • the exposure unit 44 forms an electrostatic latent image on the photosensitive surface of the drum 40 according to image data supplied from the host computer.
  • the transferring/de-electrifying unit 48 and the halogen lamp 128 of the fixing unit 122 are operated when time T2 (T2>T1) has passed after the output time of the detection signal.
  • the time T2 is set to a period of time required for the front end of the cut sheet C to reach the transferring position of the photosensitive drum 40 after the detection signal has been output.
  • the flash lamp 130 of the fixing unit 122 is repeatedly operated to intermittently emit light when time T3 (T3>T2) has passed after the output time of the detection signal.
  • the time T3 is set to a period of time required for the front end of the cut sheet C to reach a position directly below the flash lamp 130 of the fixing unit 122 after the detection signal has been output.
  • the electrostatic latent image which is formed on the photosensitive surface of the drum 40 in an exposing position Q in Fig. 16 is fed with rotation of the photosensitive drum 40 and then developed into a toner image by the developing unit 46. After this, when the toner image reaches the transferring position P0 of the photosensitive drum 40, the front end of the cut sheet C also reaches the transferring position P0. Then, the toner image on the photosensitive drum 40 is transferred to the cut sheet C in the transferring position P0 by the transfer section 48a of the transferring/de-electrifying unit 48.
  • the peeling crawl 50 is operated for a preset period of time and then brought into contact with the photosensitive drum 40.
  • the peeling crawl 50 prevents the cut sheet C from being wound on the photosensitive drum 40 when the front end of the cut sheet C passes the photosensitive drum 40.
  • the toners forming the toner image on the cut sheet C are previously heated by the halogen lamp 128, applied with flash light from the flash lamp 130 and then melt to be fixed on the cut sheet C.
  • One of the end portions of the glass plate 158 of the fixing unit 122 which lies on the downstream side in the feeding direction of the printing paper is fixed by use of the paired auxiliary metal fitting 166 as described before and the auxiliary metal fitting 166 are set in position apart from the feeding area of the printing paper. Therefore, when the printing paper passes a position directly below the fixing unit 122, the front end of the cut paper C will not be caught by the fixing unit 122.
  • the flash lamp 130 since time at which the detection signal is output from the end sensor 30 is set as a reference timing and light emission of the flash lamp is started when the front end of the cut sheet C has reached a position directly below the flash lamp 130, the flash lamp 130 can be prevented from wastefully emitting light and the service life of the lamp can be extended.
  • the cut sheet C After the cut sheet C has been fed to the fixing unit 122 and subjected to the fixing process, the cut sheet C is fed from the belt conveyer 60 to the ejecting section 10 via the scuff roller unit 70 which are operated in synchronism with the belt conveyer 60 and the cutting device 172.
  • the cutter disk 188 of the cutting device 172 is set in the standby position separated from the feeding path of the printing paper as shown in Fig. 12. Therefore, the cutter disk 188 will not obstruct the passage of the cut sheet C.
  • the ejection state of the cut sheet C is set to the face-up state or face-down state is determined according to the position of the second ejection gate 218 and then the cut sheet C is ejected onto the paper ejecting tray 220 or to the exterior of the electrophotographic apparatus.
  • the exposure unit 44 intermittently receives image data for one sheet of cut paper C from the host computer. Therefore, the exposure unit 44 intermittently effects the writing operation of an electrostatic latent image on the photosensitive drum 40 according to supply of the cut sheet C as shown in Fig. 17.
  • the transferring/de-electrifying unit 48 and the halogen lamp 128 of the fixing unit 122 are kept in the operative state until last cut paper C to be printed has passed therethrough. That is, when the image writing operation effected by the exposure unit 44 for the last cut sheet C is completed, the time of termination of the image writing operation is set as a reference timing, the operation of the transferring/de-electrifying unit 48 is interrupted when time T5 has passed after the time of termination, and the operations of the halogen lamp 128 and flash lamp 130 of the fixing unit 122 are sequentially interrupted when time T6 and time T7 which is slightly longer than the time T6 have passed after the time of termination, respectively.
  • the fanfold paper F is drawn out by the tractor unit 32 and extends on the belt conveyer 60 of the printing section 8 to the end portion of the belt conveyer 60. That is, this state is set up after a selection signal for the fanfold paper F is supplied to the control circuit of the electrophotographic apparatus from the host computer or manual switch, the printing operation for the fanfold paper F in the preceding cycle is completed, and then the fanfold paper F is set again.
  • the feeding operation of the fanfold paper F is interrupted with one of the perforation lines aligned with the transferring position P0 of the photosensitive drum 40, and then the separation device 90 is lowered to set the confluence guide 54, transferring/de-electrifying unit 48 and belt conveyer 60 in positions separated from the photosensitive drum 40 and fixing unit 122.
  • the first ejection gate 214 of the ejecting section 10 is set in the raised position.
  • the photosensitive drum 40 is rotated at a constant circumferential speed VD and the photosensitive surface is cleaned by the cleaning unit 52.
  • the tractor unit 32 is driven in a reverse direction for a preset period of time by the electric motor 85 and then stopped.
  • the fanfold paper F is drawn back towards the tractor unit 32 by a preset length as indicated by broken lines in Fig. 18.
  • the electric motor 83 drives only the photosensitive drum 40 and the power transmission path between the electric motor 83 and the feed rollers 22 is cut off.
  • the belt conveyer 60 and scuff roller unit 70 start to be driven at the same time as interruption of the tractor unit 32 and the feeding speed thereof is set to VC1.
  • the electric motor 82 which is the driving source for the belt conveyer 60 and scuff roller unit 70 is controlled to set the feeding speed VC1 higher than the circumferential speed of the photosensitive drum 40 by approx. 10 %.
  • the suction device 68 of the belt conveyer 60 is also operated at the same time that the belt conveyer 60 is driven.
  • the exposure unit 44 starts the writing operation of an electrostatic latent image on the photosensitive surface of the drum 40 according to image data from the host computer.
  • the tractor unit 32 After the writing operation of an electrostatic latent image by the exposure unit 44 has started and when time T8 has passed from the starting time of the image writing operation which is set as a reference timing, the tractor unit 32 is driven in the forward direction to start the feeding operation for the fanfold paper F.
  • the feeding speed VT of the fanfold paper F fed by the tractor unit 32 is set equal to the circumferential speed VD of the photosensitive drum 40.
  • the timing at which the operation of the flash lamp 130 is started is set equal to the timing at which the perforation line of the fanfold paper F drawn back towards the tractor unit 32 from the transferring position P0 reaches the transferring position P0 again.
  • the operation starting timing of the flash lamp in the printing process for the fanfold paper F is set to a timing which is earlier than that in the case of printing process for the cut sheet C.
  • the operation timing of the transferring/de-electrifying unit 48 and the halogen lamp 128 is the same as that set in the case of printing process for the cut sheet C.
  • the tractor unit 32 when the tractor unit 32 is driven after the time T8 has passed from the operation starting time of the belt conveyer 60 and scuff roller unit 70, that is, the starting time of writing operation of an image on the photosensitive drum 40, the tractor unit 32 effects the constant-speed driving operation to feed the fanfold paper F at the constant speed VT.
  • the tractor unit 32 is set into the constant-speed driving mode, that is, when time T11 has passed after the starting time, the separation device 90 is moved to the raised position to raise the confluence guide 54, transferring/de-electrifying unit 48 and belt conveyer 60 to the respective operative positions, that is, the printing position.
  • the fanfold paper F is guided into the confluence guide 54 at the constant feeding speed VT by the tractor unit 32 and then forcedly guided to the transferring position of the photosensitive drum 40.
  • the toner image on the photosensitive surface of the drum 40 reaches the transferring position P0 after the perforation line of the fanfold paper F which was drawn back towards the tractor unit 32 has passed the transferring position P0, the toner image is transferred from the photosensitive drum 40 to the fanfold paper F and then fixed by the fixing unit 122 in the same manner as in the case of the cut sheet C. After this, the printed fanfold paper F is folded and stacked in the paper ejecting stacker 226 of the ejecting section 10.
  • the fanfold paper F is fed with a slip on the belt conveyer 60 and the supporting roller of the scuff roller unit 70 while receiving a suction force in the belt conveyer 60.
  • the fanfold paper F is fed under the tension, the printing surface of the fanfold paper F is made flat without fail in the transferring position P0 and the fixing position, thereby making it possible to stably fix the toner image.
  • the tractor unit 32 When time T13 has passed after the starting time of the downward movement of the separation device 90, the tractor unit 32 is decelerated, stopped and driven in the reverse direction to draw back the fanfold paper F by a preset length
  • the perforation line of the fanfold paper F is aligned with the transferring position P0 of the photosensitive drum 40.
  • the operation of aligning the perforation line of the fanfold paper F with respect to the transferring position P0 can be attained by controlling the operation of the tractor unit 32 according to the count of the counter 36. Further, the time in which the belt conveyer 60 and suction device 68 are stopped is set equal to the time in which the tractor unit 32 is temporarily stopped.
  • the electric motor 82 for the belt conveyer 60 and scuff roller unit 70 is decelerated after the time of rear end detection or in a period from the time of rear end detection until the rear end of the fanfold paper F passes the tractor unit 32, and the feeding speed of the conveyer belt 60 is lowered to the feeding speed VC0 which is the same as the circumferential speed VD of the photosensitive drum 40.
  • the fanfold paper F is fed at the same feeding speed as the feeding speed of the tractor unit 32 so that the toner image can be stably transferred to and fixed on the fanfold paper F to the last page.
  • the feeding speed of the belt conveyer 60 is lowered instantaneously or gradually after the time of rear end detection.
  • Fig. 21 is a flowchart showing the steps of the post-processing, and in this flowchart, the steps S1 and S2 are already effected.
  • step S3 If a selection signal for cut sheet C is output from the host computer or the manual switch of the electrophotographic apparatus, the result of determination in the step S3 is "YES" and the cutting process (step S4) of the fanfold paper F is effected.
  • the tractor unit 32 is driven in the forward direction to feed the fanfold paper F until the perforation line which has been aligned with the transferring position P0 reaches a position of the cutting device 172.
  • the halogen lamp 128 and flash lamp 130 are operated.
  • the toner image on the fanfold paper F left behind between the photosensitive drum 40 and the fixing unit 122 in the printing process of the preceding cycle can be securely fixed.
  • the holding pads 196 of the cutting device 172 are lowered so that down stream portion of the fanfold paper F which lie on the downstream side of the perforation line may be held between the holding pads 196 and the lower guide plate 201.
  • upstream portion of the fanfold paper F which lie on the upstream side of the perforation line are held between the supporting roller 72 of the scuff roller unit 70 and the free rollers 74.
  • the cutter disk 188 which has been set in the standby position is guided by the paired guide wheels 190 and moved along the perforation line of the fanfold paper F. Since the cutter disk 188 projects upwardly to a level higher than the feeding path of the fanfold paper F, the cutter disk 188 moves while it is pushing up the perforation line of the fanfold paper F as shown in Fig. 22. Since the both portions of the fanfold paper F which lie on the upstream side and downstream side with respect to the perforation line are held, a pulling force is applied to the perforation line by the pushing-up of the cutter disk 188 and the end portion thereof is cut apart.
  • the portion of the perforation line is easily cut apart when the cutter disk 188 moves along the perforation line while rotating, and as a result, the fanfold paper F is completely cut off at the perforation line.
  • the driving belt 178 is driven in the reverse direction, the cutter disk 188 is returned to the standby position and the holding pads 196 are raised.
  • the outer peripheral portion of the cutter disk 188 is not sharp and is set in area-contact with a portion of the perforation line of the fanfold paper F with a constant width. Therefore, even when the outer periphery of the cutter disk 188 is not precisely positioned at the perforation line of the fanfold paper F, a portion of the fanfold paper F which lies near the perforation line is pushed upwardly by the cutter disk 188 so that the fanfold paper F can be cut apart at the perforation line which is a weak portion of the fanfold paper F.
  • the fanfold paper F can be smoothly cut apart at the perforation line by applying a pushing force thereto, but it is also possible to cut apart the fanfold paper F at the perforation line by use of the triangular plate 212 of the cutting device shown in Fig. 14 to apply a pushing force thereto.
  • the tractor unit 32 When the cutting process is completed, the tractor unit 32 is driven in the reverse direction to draw back the fanfold paper F which is left on the belt conveyer 60.
  • the operation of the tractor unit 32 is interrupted and the fanfold paper F is set in the standby state as shown in Fig. 23. That is, at this timing, the paper parking is completed (step S5).
  • the standby position of the fanfold paper F may be set to any position if it dose not obstruct the passage of the cut sheet C, and therefore, the cut end of the fanfold paper F is not necessarily set in the position of the end sensor 38 but may be set within the confluence guide 54.
  • step S6 the separation device 90 is moved upwardly to the raised position (step S6) and the first ejection gate 214 of the ejecting section 10 is set to the lowered position (step S7) so as to make ready for the printing process for the cut sheet C as described before (step S8).
  • step S9 When the result of determination in the step S3 is "NO”, whether the fanfold paper F is set to the standby position or not is determined (step S9), and if the result of determination is "YES", the cutting process and paper parking which are respectively similar to the steps S4 and S5 are sequentially effected (steps S10 and S11). Therefore, at this stage, the operation of exchanging the fanfold paper F can be effected. Determination in the step S9 is effected according to an instruction signal from the host computer or manual switch.
  • step S12 the cutting process is effected (step S12) and then the fanfold paper F is set again (step S13).
  • step S13 a perforation line of the fanfold paper F is aligned with the transferring position.
  • the tractor 32 is first driven in the forward direction and the fanfold paper F is supplied towards the confluence guide 54. After the front end of the fanfold paper F is detected by the end sensor 38, the feeding length of the fanfold paper F which has passed the end sensor 38 is continuously calculated by means of the rotary encoder 34 and the counter 36.
  • the traveling direction thereof is restricted. Therefore, the front end of the fanfold paper F is guided by the confluence guide 54 and passes through between the photosensitive drum 40 and the transferring/de-electrifying unit 48. Also, when the fanfold paper F passes through the photosensitive drum 40, the front end portion of the fanfold paper F will not be wound on the photosensitive drum 40 if the peeling crawl 50 is set in contact with the photosensitive drum 40.
  • the fanfold paper F is further fed on the belt conveyer 60, and if the front end thereof is detected by the detector 210 (refer to Figs. 1 and 5) immediately after having passed through the scuff roller unit 70, the operation of the tractor unit 32 is interrupted when one perforation line of the fanfold paper F is aligned with the transferring position according to the feeding length of the fanfold paper F by the tractor unit 32.
  • the separation device 90 Since the separation device 90 is set in the lowered position as described before, the feeding path of the fanfold paper F is changed when the separation device 90 is moved upwardly to the raised position even if the perforation line of the fanfold paper F has been aligned with the transferring position P0 according to the feeding length, and the perforation line is deviated from the transferring position P0 towards the tractor unit 32. Therefore, in this case, the upward movement of the separation device 90 is taken into consideration, and the perforation line of the fanfold paper F is aligned with an imaginary transferring position P1 which is deviated from the transferring position P0 towards the downstream side by a preset length ⁇ L. As a result, the perforation line is precisely aligned with the transferring position P0 when the separation device 90 is moved upwardly to the raised position.

Claims (24)

  1. Eine Druckvorrichtung mit Bildausbildungsvorrichtungen (40, 48, 122) zum Ausbilden eines Bildes auf Druckpapier, entweder Endlospapier oder Einzelblattpapier an einer Bildausbildungsposition, ersten Fördervorrichtungen (6) zum Zuführen des Druckpapiers in Richtung der Bildausbildungsposition, zweiten Fördervorrichtungen (60) zum Zuführen des Druckpapiers von der Bildausbildungsposition in Richtung einer Schneidposition an der stromabwärtigen Seite der Bildausbildungsposition bezüglich der Zufuhrrichtung des Druckpapiers, Schneidvorrichtungen (172) zum Schneiden des Druckpapiers in der Schnittposition, falls ein Endlospapier als Druckpapier verwendet wird,
    Rückziehvorrichtungen (32) zum Zurückziehen des Endlospapiers nach dem Schneiden des Endlospapiers derart, daß die Vorderkante des Endlospapiers an der Bildausbildungsposition oder in einer Position zum Entfernen des Druckpapiers angeordnet ist,
    gekennzeichnet durch Trennvorrichtungen (90) zum Trennen der zweiten Fördervorrichtungen (60) von der Bildausbildungsposition.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Bildausbildungsvorrichtungen ein bildtragendes Medium beinhalten, welches in der Bildausbildungsposition angeordnet ist; und
       daß die Trennvorrichtungen (90) das Druckpapier von dem bildtragendem Medium trennen, wenn das Druckpapier in die umgekehrte Richtung bewegt wird.
  3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die ersten Fördervorrichtungen (6) Zufuhrvorrichtungen zum einzelnen Zuführen von Einzelblättern, sowie eine Einmündungsführung (54), die an einer stromaufwärtigen Seite der Bildausbildungsposition bezüglich der Förderrichtung des Druckpapiers angeordnet ist, um das Druckpapier in Richtung der Bildausbildungsposition zu führen, und Bewegungsvorrichtungen (98, 104) aufweisen zum Bewegen der Einmündungsführung (54) in Richtung des bildtragenden Mediums (40) und von diesem weg.
  4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Vorrichtung weiterhin Vorrichtungen (106, 108) zum Betätigen der Trennvorrichtungen (110, 116) in Verbindung mit den Bewegungsvorrichtungen (98, 104) aufweist.
  5. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die ersten Fördervorrichtungen (6) Zufuhrvorrichtungen zum Zuführen von Einzelblättern in Richtung der Bildausbildungsposition aufweisen; wobei die Rückziehvorrichtungen (32) das Druckpapier zurückziehen, welches auf einem gemeinsamen Förderpfad für das Endlospapier und die Einzelblätter verbleibt, nachdem das Endlos-Druckpapier geschnitten wurde, so daß es die Zufuhr eines Einzelbattes nicht verhindert, welches dem nächsten Druckvorgang unterworfen wird.
  6. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Bildausbildungsvorrichtungen eine drehbare Trommel (40) mit einer Umfangsoberfläche beinhalten, welche als bildtragende Oberfläche dient; wobei die ersten Fördervorrichtungen (6) Zufuhrgeschwindigkeiten (VF, VT) für die Einzelblätter und das Druckpapier haben, welche gleich einer Bewegungsgeschwindigkeit (VD) der bildtragenden Oberfläche sind;
       wobei die zweiten Fördervorrichtungen (60) einen gemeinsamen Förderpfad für die Einzelblätter und das Druckpapier aufweisen und das Einzelblatt oder das Druckpapier entlang des gemeinsamen Zufuhrpfades mit der ersten oder der zweiten Zufuhrgeschwindigkeit (VC0, VC1) bewegen, welche jeweils für Einzelblätter und Druckpapier festgesetzt sind, wobei die erste Zufuhrgeschwindigkeit (VC0) für Einzelblätter gleich der Bewegungsgeschwindigkeit (VD) ist und die zweite Zufuhrgeschwindigkeit (VC1) für das Druckpapier höher als die Bewegungsgeschwindigkeit (VD) und die Fördergeschwindigkeit (VF) ist.
  7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die zweiten Fördervorrichtungen (60) weiterhin Erkennungsvorrichtungen (18) zum Erkennen des rückwärtigen Endes des Druckpapiers und eine Antriebsquelle (82) aufweisen zum Absenken der zweiten Fördergeschwindigkeit (VC1) auf die Zufuhrgeschwindigkeit (VT), während das rückwärtige Ende des Druckpapiers mit der Zufuhrgeschwindigkeit (VT) zugeführt wird, nachdem die Erkennungsvorrichtungen (18) das rückwärtige Ende des Druckpapiers erkannt haben.
  8. Druckvorrichtung nach Anspruch 1, gekennzeichnet durch Bildausbildungsvorrichtungen (40, 44) zur Ausbildung eines Bildes an einer Bildübertragungsposition, welches auf Druckpapier zu übertragen ist, Fördervorrichtungen (2, 4, 6) zur Auswahl von Einzelblatt- oder Endlospapier als Druckpapier und zum Fördern des ausgewählten Druckpapiers in Richtung der Bildübertragungsposition, sowie Übertragungsvorrichtungen (48) zur Übertragung des ausgewählten Bildes in der Bildübertragungsposition auf das ausgewählte Druckpapier, und
       Signalerzeugungsvorrichtungen (39, 38), welche vor Betätigung der Fördervorrichtungen (2, 4, 6) und Übertragungsvorrichtungen (48) betätigt werden, um selektiv eines aus unterschiedlichen Zeitgebersignalen für die Übertragungsvorgänge des Einzelblattes und des Endlospapieres zu erzeugen.
  9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß die Bildausbildungsvorrichtungen ein bildtragendes Medium (40) beinhalten, auf welchem ein zu übertragendes Tonerbild ausgebildet wird; und
       daß die Vorrichtung weiterhin Fixiervorrichtungen (122) zum Fixieren des auf das ausgewählte Druckpapier übertragenen Tonerbildes an einer Fixierposition aufweist, die an der stromabwärtigen Seite der Bildübertragungsposition bezüglich der Förderrichtung des ausgewählten Druckpapieres angeordnet sind, wobei die Fixiervorrichtungen eine Fixiereinheit (122) aufweisen, dessen Betriebsstartzeitpunkt abhängig von einem Zeitgebersignal bestimmt wird, welches von den Signalerzeugungsvorrichtungen (30, 44) kommt, wobei eine Blitzlampe (130) hierin angeordnet ist.
  10. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß die Bildausbildungsvorrichtungen ein bildtragendes Medium (40) aufweisen, auf welchem ein zu übertragendes Bild ausgebildet wird, sowie Schreibvorrichtungen (44, 46) zum Schreiben des Bildes auf das bildtragende Medium (40); und
       daß die Signalerzeugungsvorrichtungen Erkennungsvorrichtungen (30) aufweisen zum Erkennen der Vorderkante des Einzelblattes, wenn das Einzelblatt in Richtung der Bildübertragungsposition gefördert wird und zum Ausgeben des Erkennungssignales als Zeitgebersignal, wobei das Zeitgebersignal dazu verwendet wird, den Betriebsstartzeitpunkt der Schreibvorrichtungen (44) zu bestimmen.
  11. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß die Bildausbildungsvorrichtungen ein bildtragendes Medium (40) aufweisen, auf welchem ein zu übertragendes Bild ausgebildet wird, sowie Schreibvorrichtungen zum Schreiben des Bildes auf das bildtragende Medium (40); und
       daß die Signalerzeugungsvorrichtungen ein Zeitgebersignal ausgeben, wenn der Betrieb der Schreibvorrichtungen auf dem Endlospapier beginnt, wobei das Zeitgebersignal von den Fördervorrichtungen (2, 4, 6) verwendet wird, um eine Förderabgabezeit für das Endlospapier zu bestimmen.
  12. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Trennvorrichtungen (90) das Druckpapier von der Bildausbildungsposition in einer Richtung senkrecht zur Fläche des Druckpapieres trennen, wenn das Druckpapier einem nachfolgenden Druckvorgang unterworfen wird, nachdem der Schneidvorgang für das Druckpapier abgeschlossen ist,
       wobei die ersten Zufuhrvorrichtungen (4, 6) Vorrichtungen zum Kompensieren einer Abweichung der Vorderkante des Druckpapiers in Förderrichtung des Druckpapieres aufweisen, wobei die Abweichung durch Bewegung der Trennvorrichtungen (90) erzeugt wird.
  13. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Trennvorrichtungen (90) weiterhin die zweiten Fördervorrichtungen (60) zusammen mit dem Druckpapier von der Bildausbildungsposition trennen.
  14. Ein Druckverfahren mit den Schritten: Ausbilden eines Bildes auf Druckpapier, entweder einem Endlospapier oder Einzelblattpapier, in einer Bildausbildungsposition; einem ersten Förderschritt des Förderns des Druckpapiers in Richtung der Bildausbildungsposition; einem zweiten Förderschritt des Förderns des Druckpapiers durch zweite Fördervorrichtungen (60) aus der Bildausbildungsposition in Richtung einer Schneidposition an der stromabwärtigen Seite der Bildausbildungsposition bezüglich der Förderrichtung des Druckpapiers; einem Schneidschritt des Schneidens des Druckpapiers an der Schneidposition, falls Endlospapier als Druckpapier verwendet wird; und einen Rückziehschritt des Zurückziehens des Endlospapiers nachdem der Schneidschritt abgeschlossen ist, so daß die Vorderkante des Endlospapiers an der Bildausbildungsposition zum Entfernen des Druckpapiers angeordnet ist,
       gekennzeichnet durch einen Trennschritt zum Trennen der zweiten Fördervorrichtung (60) von der Bildausbildungsposition.
  15. Verfahren nach Anspruch 14, dadurch gekennzeichnet, daß der Bildausbildungsschritt unter Verwendung eines bildtragenden Mediums durchgeführt wird, das in der Bildausbildungsposition angeordnet ist; und
       daß das Druckpapier von dem bildtragendem Medium durch den Trennschritt getrennt wird, wenn das Druckpapier in die entgegengesetzte Richtung bewegt wird.
  16. Verfahren nach Anspruch 14 oder 15, dadurch gekennzeichnet, daß der erste Förderschritt einen Zufuhrvorgang zum einzelnen Zuführen von Einzelblättern, einen Führungsprozeß zum Führen eines der Einzelblätter oder des Druckpapiers in Richtung der Bildausbildungsposition mittels einer Einmündungsführung (54) an einer stromabwärtigen Seite der Bildausbildungsposition bezüglich der Förderrichtung des Druckpapieres und einen Bewegungsprozeß aufweist zum Bewegen der Einmündungsführung (54) auf die Bildausbildungsposition zu und von dieser weg.
  17. Verfahren nach Anspruch 16, dadurch gekennzeichnet, daß der Trennschritt in Verbindung mit dem Bewegungsprozeß durchgeführt wird.
  18. Verfahren nach Anspruch 14, dadurch gekennzeichnet, daß der Bildausbildungsschritt unter Verwendung einer drehbaren Trommel (40) durchgeführt wird, welche eine Umfangsoberfläche hat, die als bildtragende Oberfläche dient; wobei der erste Förderschritt einen Zufuhrprozeß zum einzelnen Zuführen von Einzelblättern in Richtung der Bildausbildungsposition beinhaltet;
    wobei entweder die Einzelblätter oder das Druckpapier von dem ersten Förderschritt mit einer Zufuhrgeschwindigkeit (VF, VT) zugeführt wird, welche gleich einer Bewegungsgeschwindigkeit (VD) der bildtragenden Oberfläche ist; und
    wobei der zweite Förderschritt unter Verwendung eines gemeinsamen Förderpfades für Einzelblatt und Druckpapier durchgeführt wird, so daß entweder die Einzelblätter oder das Druckpapier entlang eines gemeinsamen Förderpfades durch einen Betrieb der Fördervorrichtungen (60) entweder mit der ersten oder der zweiten Fördergeschwindigkeit (VC0, VC1) gefördert wird, welche jeweils für die Einzelblätter und das Druckpapier festgesetzt sind, wobei die erste Fördergeschwindigkeit (VC0) für die Einzelblätter gleich der Bewegungsgeschwindigkeit (VD) ist und die zweite Fördergeschwindigkeit (VCl) für das Druckpapier höher als die Bewegungsgeschwindigkeit (VD) und die Zufuhrgeschwindigkeit (VF) ist.
  19. Verfahren nach Anspruch 18, dadurch gekennzeichnet, daß der zweite Förderschritt weiterhin einen Erkennungsprozeß beinhaltet zum Erkennen des rückwärtigen Endes des Druckpapiers, sowie einen Verzögerungsprozeß zum Absenken der zweiten Fördergeschwindigkeit (VC1) auf die Zufuhrgeschwindigkeit (VT), während das rückwärtige Ende des Druckpapiers mit der Zufuhrgeschwindigkeit (VT) zugeführt wird, nachdem die Erkennungsvorrichtungen (18) das rückwärtige Ende des Druckpapiers erkannt haben.
  20. Druckverfahren nach Anspruch 14, gekennzeichnet durch Ausbilden eines auf Druckpapier in der Bildübertragungsposition zu übertragenden Bildes, einem Förderschritt des Auswählens entweder von Einzelblatt oder Endlospapier als Druckpapier und des Forderns des ausgewählten Druckpapiers in Richtung der Bildübertragungsposition, einem Übertragungsschritt des Übertragens des ausgebildeten Bildes auf das ausgewählte Druckpapier in der Bildübertragungsposition, und
       einen Erzeugungsschritt, der vor dem Förderschritt und dem Übertragungsschritt durchgeführt wird, um selektiv eines von unterschiedlichen Zeitgebersignalen für die Übertragungsprozesse auf Einzelblatt oder Endlospapier zu erzeugen.
  21. Verfahren nach Anspruch 20, dadurch gekennzeichnet, daß der Bildausbildungsschritt einen Prozeß des Ausbildens eines elektrostatischen Latentbildes auf einem fotoempfindlichen Medium (40) und einen Entwicklungsprozeß zum Entwickeln des Latentbildes auf dem fotosensitiven Medium in ein Tonerbild beinhaltet; und
       wobei das Verfahren weiterhin einen Fixierschritt des Fixierens des auf das ausgewählte Druckpapier übertragenen Tonerbildes in einer Fixierposition aufweist, welche an der stromabwärtigen Seite der Bildübertragungsposition bezüglich der Förderrichtung des ausgewählten Druckpapieres angeordnet ist, sowie einen Schritt des Bestimmens des Betriebs-Start-Zeitpunktes des Fixierschrittes abhängig von einem Zeitgebersignal, welches in dem Signalerzeugungsschritt erzeugt wird.
  22. Verfahren nach Anspruch 20, dadurch gekennzeichnet, daß der Bildausbildungsschritt weiterhin einen Schreibprozeß zum Schreiben eines Bildes auf das bildtragende Medium (40) beinhaltet; und
       wobei der Signalerzeugungsschritt einen Erkennungsprozeß zum Erkennen des vorderen Endes des Einzelblattes beinhaltet, wenn das Einzelblatt in Richtung der Bildübertragungsposition gefördert wird, sowie einen Ausgabeprozeß zum Ausgeben eines Zeitgebersignales, wenn das Vorderende des Einzelblattes in dem Erkennungsprozeß erkannt wird, wobei das Zeitgebersignal verwendet wird, den Betriebsstartzeitpunkt des Schreibvorganges zu bestimmen.
  23. Verfahren nach Anspruch 20, dadurch gekennzeichnet, daß der Bildausbildungsschritt weiterhin einen Schreibprozeß zum Schreiben eines Bildes auf das bildtragende Medium (40) beinhaltet; und
       wobei ein Zeitgebersignal in dem Signalerzeugungsschritt erzeugt wird, wenn der Schreibprozeß auf Endlospapier begonnen wird, wobei das Zeitgebersignal verwendet wird, den Zeitpunkt zu bestimmen, zu welchem das Endlospapier in dem Förderschritt gefördert wird.
  24. Druckverfahren nach Anspruch 14, dadurch gekennzeichnet, daß der Trennschritt das Druckpapier von der Bildausbildungsposition in einer Richtung senkrecht zur Fläche des Druckpapieres trennt, wenn das Druckpapier nachfolgendem Drucken unterworfen wird, nachdem der Schneidvorgang für das Druckpapier abgeschlossen ist,
       wobei der erste Förderschritt einen Prozeß zum Kompensieren einer Abweichung der Vorderkante des Druckpapiers in Förderrichtung des Druckpapieres beinhaltet, wobei die Abweichung durch Durchführung des Trennschrittes erzeugt wird.
EP96100129A 1992-08-12 1992-08-12 Vorrichtung und Verfahren zum Drucken Expired - Lifetime EP0713157B1 (de)

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EP96100129A EP0713157B1 (de) 1992-08-12 1992-08-12 Vorrichtung und Verfahren zum Drucken
DE1992630677 DE69230677T2 (de) 1992-08-12 1992-08-12 Vorrichtung und Verfahren zum Drucken
HK98106681A HK1007473A1 (en) 1992-08-12 1998-06-25 Printing apparatus and method

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EP96100129A EP0713157B1 (de) 1992-08-12 1992-08-12 Vorrichtung und Verfahren zum Drucken
EP19920113772 EP0582741B1 (de) 1992-08-12 1992-08-12 Elektrofotografisches Gerät und Verfahren

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JP3945247B2 (ja) * 2001-12-27 2007-07-18 富士ゼロックス株式会社 フラッシュ定着装置及びこれを使用した印刷装置

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JPS63315451A (ja) * 1987-01-17 1988-12-23 Asahi Optical Co Ltd 電子写真用被記録媒体供給方法
JPH07110546B2 (ja) * 1988-05-25 1995-11-29 インターナショナル ビジネス マシーンズ コーポレーション 電子写真方式の印刷装置
JP2757386B2 (ja) * 1988-09-02 1998-05-25 日立工機株式会社 レーザプリンタ
JPH0735214B2 (ja) * 1988-10-05 1995-04-19 沖電気工業株式会社 電子写真記録装置
EP0391632B1 (de) * 1989-04-03 1994-01-19 Sharp Kabushiki Kaisha Blattfördervorrichtung für Faksimilegerät
US5113228A (en) * 1990-02-09 1992-05-12 Asahi Kogaku Kogyo Kabushiki Kaisha Sheet separating mechanism
DE69014617T2 (de) * 1990-07-30 1995-04-13 Toray Industries Elektrophotographisches Druckgerät.

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