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US3784297A - Photocopying machine - Google Patents

Photocopying machine Download PDF

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Publication number
US3784297A
US3784297A US00120132A US3784297DA US3784297A US 3784297 A US3784297 A US 3784297A US 00120132 A US00120132 A US 00120132A US 3784297D A US3784297D A US 3784297DA US 3784297 A US3784297 A US 3784297A
Authority
US
United States
Prior art keywords
housing
photosensitive drum
copy medium
electrophotographic photosensitive
developing
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
US00120132A
Other languages
English (en)
Inventor
Y Ito
H Nitanda
M Yamaguchi
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
Priority claimed from JP45020075A external-priority patent/JPS5029651B1/ja
Application filed by Canon Inc filed Critical Canon Inc
Application granted granted Critical
Publication of US3784297A publication Critical patent/US3784297A/en
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
    • G03G15/22—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
    • 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
    • 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
    • G03G21/1628—Clamshell type
    • 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
    • G03G21/1642—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements for connecting the different parts of the apparatus
    • G03G21/1647—Mechanical connection means
    • 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
    • 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
    • G03G2221/1606—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for the photosensitive element
    • 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
    • G03G2221/1618—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for the cleaning 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
    • G03G2221/1618—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for the cleaning unit
    • G03G2221/1624—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for the cleaning unit transporting cleaned toner into separate vessels, e.g. photoreceptors, external containers
    • 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
    • G03G2221/1636—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for the exposure 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
    • 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
    • G03G2221/18—Cartridge systems

Definitions

  • An electrophotographic copying machine of this invention has an original holder reciprocating on the upper surface of an electrophotographic photosensitive member which is rotatably fixed to the supporting device therefor.
  • the charging device is arranged on one side of the photosensitive member.
  • the copying machine further includes optical system for slit exposure, developing device, fixing device and cleaning device, which are arranged on the other side of the photosensitive member. Copy sheet feeding device, image transfer device are also arranged below the photosensitive member.
  • FIG. I6 F PAIENTED 8W 3.784.297 saw near 16 FIG. I6
  • the present invention relates to a photocopying machine and more particularly an electrophotographic copying machine of the type in which an original stand is reciprocated, exposure is made through a slit and an electrophotographic photosensitive member is in the form of a rotary drum.
  • the present invention relates to an electrophotographic copying machine of the type in which an electrophotographic photosensitive member consisting'of a photoconductive layer sandwiched between an insulating surface layer and an insulating or conducting member is used and an original in the form of asheet or a thick original may be reproduced automatically, rapidly and economically reproduced upon copy media such as sheets of copy paper or the like (to be referred to as copy paper hereinafter in this specification).
  • One of the objects of the present invention is to provide an improved electrophotographic copying machine (to be referred to as photocopying machine for brevity hereinafter) which is compact in size because a space required for replacement of an electrophotographic photosensitive member (to be referred to as sensitive member or drum for brevity hereinafter) may be reduced to the minimum and which facilitates the inspection and maintenance of various means required for the electrophotographic process and disposed around the sensitive drum or member after its removal.
  • Another object of the present invention is to provide an improved photocopying machine in which various processing means are arranged as units so that the mounting or removal and inspection and maintenance of these various units may be much facilitated.
  • an improved photocopying machine in which an original holder upon which is placed an original to be copied is disposed upon the top of the photocopying machine for reciprocal movement and the copy papers are fed one by one by feeding means and discharged after the copying operation.
  • a rotary sensitive drum At the center of the main body of the housing is disposed a rotary sensitive drum to the peripheral surface of which is applied a lamination consisting of a photoconductive layer sandwiched between an insulating surface layer and an insulating or conducting layer.
  • first charging means Around the sensitive drum are disposed first charging means, simultaneous exposure-charging means, whole-surface-illumination means, developing means, third charging means, image transfer means and cleaning means in the order named in the direction of rotation of the rotary sensitive drum.
  • the rotary sensitive drum is positively or negatively charged by dc corona discharge generated by the first charging means.
  • the dc corona discharge whose polarity is opposite to that of the dc corona discharge by the first charging means or ac corona discharge is applied to the rotary sensitive drum by the simultaneous exposure-charging means simultaneously when a light or radiation image of the original to be reproduced is exposed or projected upon the rotary sensitive drum.
  • the whole-surface exposure means the whole surface of the rotary sensitive drum is uniformly exposed so as to increase the contrast of the image.
  • the electrostatic latent image thus formed may be developed into apositiveor negative toner image by the toner which is charged with a polarity opposite to or same as that of the latent image by the developing means.
  • the third charging means is not necessarily required, but may be used with a desired polarity so that the image transfer efficiency may be improved.
  • the toner image thus developed may be transferred by the image transfer means to a copy paper. After the image transfer the toner which still remains upon the rotary sensitive drum is removed or cleaned by the cleaning means. Thus one cycle of copying or reproduction operation is completed as far as the rotary sensitive drum is concerned.
  • the copy paper is separated from the rotary sensitive drum by a separating means and fixed in the fixing means and then discharged out of the photocopying machine.
  • FIG. 1 is a perspective view illustrating the outer apperance of a photocopying machine in accordance with the present invention
  • FIG. 2 is a longitudinal front view thereof
  • FIG. 3 is a transverse sectional view thereof illustrating a rotary sensitive drum unit and a reciprocable original holder
  • FIG. 4 is a top view of the rotary sensitive drum unit
  • FIG. 5 is a perspective view of the original holder and its reciprocating means
  • FIG. 6 is a perspective view illustrating the mounting and removal of the rotary sensitive drum unit
  • FIG. 7 is a view illustrating the mounting and removal of means for illuminating the original and charging means unit
  • FIG. 8 is a sectional view of a developing means
  • FIG. 9 is a perspective view illustrating means for supplying the developing agent to the developing means.
  • FIG. 10 is a fragmentary front view thereof on enlarged scale
  • FIG. 11 is a side view thereof
  • FIG. 12 is a top view of means for circulating the developing agent in the developing means
  • FIG. 13 is a longitudinal front view of another embodiment of means for supplying the developing agent in accordance with the present invention.
  • FIG. 14 is a side view thereof
  • FIGS. 15 and 16 are side views illustrating one embodiment of means for opening or closing a discharge opening of a hopper
  • FIGS. 17 and 18 are front view illustrating means for adjusting an angle of rotation of a spiral feed roller disposed in the hopper shown inFIGS. l and 16;
  • FIG. 19 is a perspective view of the opening and closing means shown in FIGS. and 16;
  • FIG. 20 is a front view of one embodiment of a passage of copy paper
  • FIG. 21 is a fragmentary perspective view thereof on enlarged scale
  • FIG. 22 is a front view of one embodiment of means for controlling the activation and de-activation of the developing means
  • FIG. 23 is an electric circuit diagram thereof
  • FIG. 24 is a perspective view of one embodiment of fixing means in accordance with the present invention.
  • FIG. 25 is a front view thereof
  • FIG. 26 is a longitudinal section view thereof
  • FIG. 27 is a sectional view of one embodiment of cleaning means in accordance with the present invention.
  • FIG. 28 is a fragmentary top view thereof on enlarged scale
  • FIG. 29 is a sectional view of another embodiment of cleaning means in accordance with the present invention.
  • FIGS. 30 through 33 are views illustrating brushes used in the cleaning means for removing the developing agent
  • FIG. 34 is a view illustrating one embodiment of means for moving the developing agent removed in the cleaning means to a collection box
  • FIG. 35 is for explanation of a method for applying on and removing from a roller a cleaning material in accordance with the present invention.
  • FIG. 36 is a front view illustrating means for controlling the rotation of a cleaning roller
  • FIG. 37 is a sectional view thereof
  • FIG. 38 is a longitudinal sectional view of one embodiment of charging means in accordance with the present invention.
  • FIG. 39 is a top view thereof.
  • FIG. 40 is a transverse sectional view thereof.
  • FIG. 1 shows a perspective view of an embodiment of the present invention showing its outer apperance.
  • an original holder 11 Upon an original holder 11 is placed an original with its surface faced down.
  • the original holder 11 is reciprocated for carrying out the slit exposure.
  • the sheets of copy paper P are fed one by one by a feeding means, processed by an electrophotographic device and discharged out of an outlet 12.
  • an electrophotographic sensitive layer 1 consisting of a photoconductive layer sandwiched between a surface insulating layer and a conducting or insulating layer.
  • a first charging means 3 a simultaneous exposure-charging means 5, a whole-surface exposure means 6, a developing means 7, a third charging means 8, a transfer means 9 and a cleaning means l0.
  • the DC corona discharge is imparted by the first charging means 4 to the surface of the rotary sensitive drum 2 so that the sensitive layer 3 may be positively or negatively charged.
  • the simultaneous exposurecharging means 5 the DC corona discharge having the polarity opposite to that applied by the first charging means 4 or the AC corona discharge is applied to the sensitive layer 3 simultaneously when a light or radiation image of the original to be copied is projected upon the sensitive layer 3 or drum 1 to produce an electrostatic image.
  • the whole-surface exposure means 6 such as fluorescent lamp the'electrostatic latent image is uniformly illuminated so as to increase the action of the latent image as the external field, thereby increasing the contrast of the electrostatic latent image.
  • the toner having the polarity opposite to that of the electrostatic latent image it is developed by the developing means 7.
  • the electrostatic latent image may be developed into a negative image by use of the toner having the same polarity as that of the latent image. It is preferable to use the magnet brush or fur brush developing method.
  • the third charging means 8 is not necessarily required. However, it is used with a suitable polarity so as to improve the efficiency of transferring to the copy paper P the toner image formed upon the sensitive drum 1.
  • the toner image is transferred electrostatically to the copy paper P by the transfer means 9.
  • the toner still remained upon the sensitive drum 1 after the image transfer is wiped off by cleaning rollers in the cleaning means 10.
  • the copy paper P upon which is transferred the toner image from the sensitive drum 1 is separated from the sensitive drum by a separating means, fixed by the fixing means and discharged out of the photocopying machine from the outlet 12. Since the copy paper P is charged, the electrostatic charge is removed from the copy paper P by an AC charging means 30.
  • the photocopying machine in accordance with the present invention further includes driving means, exposure means, feeding means, control means and so on and the present invention is characterized by the arrangement thereof and the assembly and disassembly thereof as will be described in more detail hereinafter.
  • the original holder 11 has two rollers 17 and 18.
  • the roller 17 rides on a rail 13 extending between frames of the housing while the roller 18 is enclosed in a channel-like member 16 and rides on a rail 14 mounted between the frames. It is noted that the rail 14 and the roller 18 in the channel-like member 16 are disposed below an inner frame 15 of the original holder 11. The deviation in the transverse direction, that is to the right and left of the original holder 11 may be prevented by the roller 18 which has a configuration of a drum as shown in FIG.
  • a transparent plate 21 such as a glass plate is mounted on the inner frame 15 of the original holder 1 1 and a pressure plate 22 for pressing the original against the transparent plate 21 is provided.
  • a shaft 27 of the sensitive drum 1 extending through bearings 23 of end plates 1 and 1 is supported by supporting plates 25; and 25 and retained by retaining members 26 and 26
  • Stays 24 are fixed to the supporting plates 26, and 26 which in turn are fixed to side plates 31, and 31 fixed to the housingJA driving gear 30 is mounted on a boss of the sensitive drum 1.
  • the sensitive drum unit is constituted.
  • a drive gear G, for driving the sensitive drum unit is provided with a control member CAM 1 which is associated with a switch MS-l mounted upon the side plate 31 for controlling the original holder, a counter and the toner supply.
  • Ridges 33 are formed on the supporting plates 25, and 25 while their mating grooves 32 are formed in the side plates 31, and 31 as shown in FIGS. 4 and 6 so that the drum unit may be easily, rapidly and vertically mounted on or removed out of the side plates 31, and 31
  • the drum unit may be securely held in position by means of setscrews 34.
  • the sensitive drum 1 isdriven by an electric motor MT through a gear G an idlerG and the drive gear 6., carried by the drum shaft 27.
  • the sensitive drum 1 is always rotated in a predetermined direction in operation.
  • the original holder 11 is moved in the direction indicated by the arrow a in FIG. 2 when the exposure is made, and upon completion of the exposure the original holder 11 is reversed in the direction of the arrow b to the initial position.
  • two belts or wires 35 and 36 are wrapped around a guide pulley R and a drive pulley PL in the opposite directions.
  • One ends of the belts or wires 35 and 36 are fixed to the channel-like member 16 while the other ends to the drive pulley PL.
  • two clutches C-1 and C-2 are provided as shown in FIG. 4.
  • the main motor MT In response to a signal from a start button, the main motor MT starts to rotate the sensitive drum 1 through the gears G G and 6,.
  • the switch MS-l When the switch MS-l is actuated by the control member CAM-1 of the gear 6., carried by the sensitive drum 1, the clutch C-l is actuated so as to transmit the power from the main motor MT to a drive gear G through the gears G G clutch C-l, and a gear G
  • the drive gear G is carried by a shaft 37 which also carries the pulley PL. Therefore the drive pulley 37 ro- .tates in the direction of the arrow C in FIG. 5, winding the wire 35 while unwinding the wire 36.
  • the original holder 11 is moved in the direction indicated by the arrow a at a predetermined speed, so that the original is exposed through a slit and the light image is continuously projected upon the sensitive drum 1 through the simultaneous exposure-charging means 5.
  • an electrostatic latent image is formed upon the sensitive drum 1 which has been previously charged by the first charging means 4.
  • the peripheral speed of the sensitive drum 1 relative to the speed of the original holder 11 in the direction of the arrow a is predetermined.
  • a stroke cam CAM-2 (See FIG. 4) mounted upon the drive gear G actuates a microswitch MS-3 fixed upon the housing so that the clutch C-l is disengaged while the clutch C-2 is engaged.
  • the original holder 11 is returned to its initial position in the direction indicated by the arrow b by the gear train of G G G G the clutch G2, G and G
  • the original holder 11 may be returned quickly when the number of teeth of the gear G which is in mesh with the gear G used in the return stroke of the original holder 11 is less than that of the gear used in the going stroke. Thie quick return stroke permits the high speed copying operation.
  • the stroke cam CAM-3 of the drive gear G actuates a microswitch MS-2 (See FIG. 4) so that the main motor MT is temporarily applied with brake so as to stop the original holder 11.
  • the clutch O2 is disengaged so that the original holder 11 is completely disconnected from the main motor MT so that the original holder 11 may be held in its initial position.
  • the sensitive drum 1 is also stopped. The above described two-step operation of first stopping the original holder 11 and then disconnecting it from its driving means is employed to absorb the inertia of the original holder in its return stroke.
  • an illumination system 40 includes a light source such as fluorescent lamps 41 for illuminating the original, shielding plates 42 and cooling means such as a fan (not shown) which is used for cooling the lamps 41 so as to prevent the decrease of its illumination efficiency.
  • a light source such as fluorescent lamps 41 for illuminating the original
  • shielding plates 42 and cooling means such as a fan (not shown) which is used for cooling the lamps 41 so as to prevent the decrease of its illumination efficiency.
  • the cooling air from the fan is directed in the longitudinal direction of a space defined by the original holder 11, the shielding plates 42 and a black box 43 so that the fluorescent lamps 41 may be cooled along their entire lengths.
  • a current twice the rated current is supplied to increase the luminous intensity.
  • the lamps 41 are normally turned on by the rated current so that there may be no warming-up time and that its service life may be increased.
  • the in-mirror type lens 47 has such a construction that the conventional lens is divided into two parts along its symmetrical axis and a mirror 48 is disposed at the center so that light reflected by the second mirror 48 may pass through the lens 47 and a transparent plate 49 for preventing the dust or the like from entering the black box 43 and may be projected upon the sensitive drum 1 through an opening of the simultaneous-exposure-charging means 5.
  • a conductingtransparent plate such as NESA glass may be used as the dust-proof transparent plate 49 so that the charging efficiency of the simultaneous exposure-charging means 5 may be improved.
  • a reflector 50 for the lamp 41 is partly cut away so that the intensity of light from a portion of the lamp 41 having no reflector may be reduced, whereby the original may be uniformly illuminated regardless of the reduction in light quantity or fall-off of luminance in the peripheral portion of the lens 47.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Cleaning In Electrography (AREA)
  • Dry Development In Electrophotography (AREA)
  • Electrophotography Configuration And Component (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Fixing For Electrophotography (AREA)
US00120132A 1970-03-11 1971-03-02 Photocopying machine Expired - Lifetime US3784297A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP45020075A JPS5029651B1 (de) 1970-03-11 1970-03-11
JP3211270 1970-04-15

Publications (1)

Publication Number Publication Date
US3784297A true US3784297A (en) 1974-01-08

Family

ID=26356967

Family Applications (1)

Application Number Title Priority Date Filing Date
US00120132A Expired - Lifetime US3784297A (en) 1970-03-11 1971-03-02 Photocopying machine

Country Status (6)

Country Link
US (1) US3784297A (de)
CA (1) CA959114A (de)
DE (6) DE2166669C3 (de)
FR (1) FR2081850B1 (de)
GB (1) GB1352752A (de)
NL (2) NL7103059A (de)

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3872829A (en) * 1972-07-13 1975-03-25 Olivetti & Co Spa Unit for the magnetic brush development of latent electrostatic images
US3923391A (en) * 1972-09-24 1975-12-02 Mita Industrial Co Ltd Electrostatic photographic copying apparatus
US3957016A (en) * 1972-09-29 1976-05-18 Canon Kabushiki Kaisha Developer wringing and removing apparatus
FR2301857A1 (fr) * 1975-02-19 1976-09-17 Agfa Gevaert Ag Dispositif de nettoyage pour appareils de reprographie electriques
US3999850A (en) * 1972-04-13 1976-12-28 Canon Kabushiki Kaisha Optical system for an electrophotographic device
US4003335A (en) * 1974-05-21 1977-01-18 Minolta Camera Kabushiki Kaisha Developing material applicator
US4021113A (en) * 1975-02-19 1977-05-03 Agfa-Gevaert, A.G. Cleaning device for electrostatic copiers
US4023897A (en) * 1976-01-28 1977-05-17 International Business Machines Corporation Optics drive mechanism
US4030824A (en) * 1975-11-03 1977-06-21 Xerox Corporation Reproducing apparatus having an improved imaging surface cleaning system
DE2715730A1 (de) * 1976-04-13 1977-11-03 Canon Kk Verfahren und vorrichtung zur vermeidung einer beeintraechtigung eines unfixierten sichtbaren bildes
JPS5376934U (de) * 1976-11-30 1978-06-27
US4127082A (en) * 1975-09-26 1978-11-28 Sharp Kabushiki Kaisha Wiper roller for drying a wet sheet in a copying machine
US4134669A (en) * 1977-04-18 1979-01-16 Siemens Aktiengesellschaft Drum support for electrostatic printer
US4134673A (en) * 1975-02-27 1979-01-16 Xerox Corporation Dual brush cleaning apparatus
US4168901A (en) * 1975-01-21 1979-09-25 Canon Kabushiki Kaisha Developer housing sealing device for electrophotography
JPS5597764U (de) * 1978-12-27 1980-07-07
US4222659A (en) * 1971-06-03 1980-09-16 Canon Kabushiki Kaisha Copying apparatus for sheet originals and thicker originals
US4451133A (en) * 1981-04-30 1984-05-29 Siemens Aktiengesellschaft Device for removing the developer mix from a developing station
US4457613A (en) * 1981-04-30 1984-07-03 Siemens Aktiengesellschaft Mixing device for blending a developer consisting of carrier particles and toner
US4460266A (en) * 1981-04-30 1984-07-17 Siemens Aktiengesellschaft Developing device for developing charge images on a charge image carrier
US4465112A (en) * 1981-04-28 1984-08-14 Siemens Aktiengesellschaft Device for filling toner from a container into a reservoir
US4522487A (en) * 1979-06-08 1985-06-11 Tokyo Shibaura Denki Kabushiki Kaisha Sealing device for electrostatic copying machine
US4932355A (en) * 1985-10-09 1990-06-12 Siemens Aktiengesellschaft Method for removing a developer mix from a developing station
US4945956A (en) * 1986-10-02 1990-08-07 Siemens Aktiengesellschaft Device for transferring toner from a transport container into a toner reservoir
US4990964A (en) * 1986-10-02 1991-02-05 Siemens Aktiengesellschaft Toner delivery system having a multi-functional toner container for non-mechanical printer and copier means
US5074342A (en) * 1986-10-02 1991-12-24 Siemens Aktiengesellschaft Device for non-contaminating changing of a toner container in a toner conveying means of a non-mechanical printer or copier means
US6126356A (en) * 1998-06-29 2000-10-03 Xerox Corporation Gear mounting using tubing and snap-fit caps
US20060083567A1 (en) * 2004-10-20 2006-04-20 Canon Kabushiki Kaisha Image heating apparatus and pad sheet therefor
US8960664B2 (en) 2012-03-01 2015-02-24 Canon Kabushiki Kaisha Image forming apparatus

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US3826892A (en) * 1972-10-25 1974-07-30 Xerox Corp Fusing apparatus
US3999514A (en) * 1975-09-29 1976-12-28 International Business Machines Corporation Magnetic brush developer
DE2606458A1 (de) * 1976-02-18 1977-08-25 Eisbein Develop Kopiergeraet
US4188907A (en) * 1977-08-11 1980-02-19 Xerox Corporation Particle dispenser with a magnetically driven agitator
JPS5347834U (de) * 1977-09-21 1978-04-22
JPS6026018Y2 (ja) * 1978-12-27 1985-08-05 コニカ株式会社 複写機等のクリ−ニング装置
DE3224296C1 (de) * 1982-06-29 1983-06-09 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zum Einfuellen und Sieben von Toner aus einem Behaelter in einen Tonervorratsbehaelter
US4557586A (en) * 1982-11-30 1985-12-10 Mita Industrial Co., Ltd. Image-forming apparatus
JPS63101969U (de) * 1986-12-22 1988-07-02
JPH01146243U (de) * 1988-03-31 1989-10-09
JPH0369153U (de) * 1989-11-09 1991-07-09

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Cited By (33)

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Publication number Priority date Publication date Assignee Title
US4222659A (en) * 1971-06-03 1980-09-16 Canon Kabushiki Kaisha Copying apparatus for sheet originals and thicker originals
US3999850A (en) * 1972-04-13 1976-12-28 Canon Kabushiki Kaisha Optical system for an electrophotographic device
US3872829A (en) * 1972-07-13 1975-03-25 Olivetti & Co Spa Unit for the magnetic brush development of latent electrostatic images
US3923391A (en) * 1972-09-24 1975-12-02 Mita Industrial Co Ltd Electrostatic photographic copying apparatus
US3957016A (en) * 1972-09-29 1976-05-18 Canon Kabushiki Kaisha Developer wringing and removing apparatus
US4003335A (en) * 1974-05-21 1977-01-18 Minolta Camera Kabushiki Kaisha Developing material applicator
US4168901A (en) * 1975-01-21 1979-09-25 Canon Kabushiki Kaisha Developer housing sealing device for electrophotography
US4021113A (en) * 1975-02-19 1977-05-03 Agfa-Gevaert, A.G. Cleaning device for electrostatic copiers
FR2301857A1 (fr) * 1975-02-19 1976-09-17 Agfa Gevaert Ag Dispositif de nettoyage pour appareils de reprographie electriques
US4134673A (en) * 1975-02-27 1979-01-16 Xerox Corporation Dual brush cleaning apparatus
US4127082A (en) * 1975-09-26 1978-11-28 Sharp Kabushiki Kaisha Wiper roller for drying a wet sheet in a copying machine
US4030824A (en) * 1975-11-03 1977-06-21 Xerox Corporation Reproducing apparatus having an improved imaging surface cleaning system
US4023897A (en) * 1976-01-28 1977-05-17 International Business Machines Corporation Optics drive mechanism
DE2715730A1 (de) * 1976-04-13 1977-11-03 Canon Kk Verfahren und vorrichtung zur vermeidung einer beeintraechtigung eines unfixierten sichtbaren bildes
JPS5536845Y2 (de) * 1976-11-30 1980-08-29
JPS5376934U (de) * 1976-11-30 1978-06-27
US4134669A (en) * 1977-04-18 1979-01-16 Siemens Aktiengesellschaft Drum support for electrostatic printer
JPS6237246Y2 (de) * 1978-12-27 1987-09-22
JPS5597764U (de) * 1978-12-27 1980-07-07
US4522487A (en) * 1979-06-08 1985-06-11 Tokyo Shibaura Denki Kabushiki Kaisha Sealing device for electrostatic copying machine
US4465112A (en) * 1981-04-28 1984-08-14 Siemens Aktiengesellschaft Device for filling toner from a container into a reservoir
US4457613A (en) * 1981-04-30 1984-07-03 Siemens Aktiengesellschaft Mixing device for blending a developer consisting of carrier particles and toner
US4460266A (en) * 1981-04-30 1984-07-17 Siemens Aktiengesellschaft Developing device for developing charge images on a charge image carrier
US4451133A (en) * 1981-04-30 1984-05-29 Siemens Aktiengesellschaft Device for removing the developer mix from a developing station
US4932355A (en) * 1985-10-09 1990-06-12 Siemens Aktiengesellschaft Method for removing a developer mix from a developing station
US4945956A (en) * 1986-10-02 1990-08-07 Siemens Aktiengesellschaft Device for transferring toner from a transport container into a toner reservoir
US4990964A (en) * 1986-10-02 1991-02-05 Siemens Aktiengesellschaft Toner delivery system having a multi-functional toner container for non-mechanical printer and copier means
US5074342A (en) * 1986-10-02 1991-12-24 Siemens Aktiengesellschaft Device for non-contaminating changing of a toner container in a toner conveying means of a non-mechanical printer or copier means
US6126356A (en) * 1998-06-29 2000-10-03 Xerox Corporation Gear mounting using tubing and snap-fit caps
US6412163B1 (en) 1998-06-29 2002-07-02 Xerox Corporation Method for gear mounting using tubing and snap-fit caps
US20060083567A1 (en) * 2004-10-20 2006-04-20 Canon Kabushiki Kaisha Image heating apparatus and pad sheet therefor
US7379697B2 (en) 2004-10-20 2008-05-27 Canon Kabushiki Kaisha Image heating apparatus with a pad sheet for a pressing member of the image heating apparatus
US8960664B2 (en) 2012-03-01 2015-02-24 Canon Kabushiki Kaisha Image forming apparatus

Also Published As

Publication number Publication date
DE2166669A1 (de) 1975-01-16
DE2166667B2 (de) 1978-02-23
DE2166667C3 (de) 1978-10-26
DE2166669B2 (de) 1980-09-18
DE2166669C3 (de) 1986-10-23
FR2081850B1 (de) 1976-04-16
DE2167105C2 (de) 1984-01-26
DE2166668A1 (de) 1975-01-16
NL7103059A (de) 1971-09-14
GB1352752A (en) 1974-05-08
DE2166667A1 (de) 1975-01-16
DE2166948A1 (de) 1976-11-11
DE2111759A1 (de) 1971-09-30
DE2166948B2 (de) 1981-07-09
NL7808013A (nl) 1978-12-29
FR2081850A1 (de) 1971-12-10
CA959114A (en) 1974-12-10
DE2166948C3 (de) 1982-04-01

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