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US3641907A - Developer replenishing device for copying apparatus - Google Patents

Developer replenishing device for copying apparatus Download PDF

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Publication number
US3641907A
US3641907A US818701A US3641907DA US3641907A US 3641907 A US3641907 A US 3641907A US 818701 A US818701 A US 818701A US 3641907D A US3641907D A US 3641907DA US 3641907 A US3641907 A US 3641907A
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US
United States
Prior art keywords
plunger
transport device
valve
developing
transport
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
US818701A
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English (en)
Inventor
Georg Cranskens
Hans Jakobson
Armin Rathje
Werner Salger
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.)
Lumoprint Zindler KG and Co GmbH
Original Assignee
Lumoprint Zindler KG and Co GmbH
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 DE19681772295 external-priority patent/DE1772295C/de
Application filed by Lumoprint Zindler KG and Co GmbH filed Critical Lumoprint Zindler KG and Co GmbH
Application granted granted Critical
Publication of US3641907A publication Critical patent/US3641907A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/10—Apparatus for electrographic processes using a charge pattern for developing using a liquid developer
    • G03G15/104—Preparing, mixing, transporting or dispensing developer
    • G03G15/105—Detection or control means for the toner concentration
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/02—Exposure apparatus for contact printing

Definitions

  • the threaded spindle moves a plunger translatorily in response to each movement of the roller.
  • the translatory movements accumulate until the plunger reaches a stop position where it opens the valve. After opening the valve the plunger returns to a starting position on the spindle. At least one of these positions is adjustable.
  • the invention relates to a developing device for copying apparatus operating according to the electrophotographic method.
  • the copying papers to be processed may have a zinc oxide coating, sensitized by charging and provided with a latent picture by exposure. This can be developed by passing through a liquid developer in which the pigments are dispersed.
  • a storage tank is provided for adding a substance to the developer as a function of the passage of copying sheets, and this substance refers particularly to such pigment particles which are added to the carrier fluid of the developer.
  • pigment particles possibly on carrier particles so that also here pigment particles are added, possibly in connection with the carrier particles.
  • pigmentation particles are removed from the developer during the developing because they color the latent picture and this withdrawal of pigmentation particles is made good by the addition from the storage tank.
  • Such a transport mechanism may be constructed'in many ways, by means of a translatory movement such as in the form of an adjustable crank which carries along the plunger.
  • the said element has the form of a shaft rotating through a certain angle for every passage of coping paper and the transport mechanism is a spindle'fitted in the axial direction of the shaft and into which the said plunger engages from one side; at one end of the spindle there is arranged the switching cam rotating with it and projecting over a limited part of the periphery radially towards one side from the spindle. in this manner the spindle is used simultaneously for producing a mechanical stroke of the plunger to operate the delivery valve.
  • the arrangement of a spindle on a shaft rotating only through a certain angle for every passage of a copying sheet makes it possible to select different numbers of steps for the valve operation with a comparatively short spindle.
  • Such a switching roller equipped with a flattened portion rotates through 360 or a whole multiple, irrespective of the length of the copying sheet for introducing the copying paper from a ready position into a continuously running transport mechanism.
  • the switching cam has the shape of a section of a thread and may be brought into engagement with the correspondingly constructed working end of theplunger. This ensures areliable engagement at the moment of the stroke of the plunger and provides with simple means a substantial force for operating the delivery valve.
  • thelimit stop is adjustable in the axial direction of the spindle away from-the switching cam. In this way the operating rhythm of the addition of developer may be adjusted according to the number of copies. A further adjustment is possible by making the angle, through which the shaft rotates for every passage of a paper, a variable one.
  • the carrier crosshead is associated with an adjustable actuating device having an adjusting mechanism for the adjustable-stop and a rigidly connected adjusting device for a pivoting lever the other end of which engages the plunger and raises the same during an adjustment of the stop, particularly in steps against the action of a spring, out of the spindle.
  • the adjustable stop may be moved in a stepless manner while the plunger follows in steps by intermittently being lifted off the spindle.
  • the adjusting device may be constructed as a crank drive.
  • the adjustable stop is guided after the manner of a slide on the carrier crosshead substantially parallel to the axis of the spindle and the adjusting device has a worm track about an actuating rod as guide means for an actuating pin of the stop.
  • the adjusting mechanism comprises a locking plate toothed in a plane perpendicular to the pivoting axis of the lever and whose locking recesses are so dimensioned that when a head of the pivoting lever engages into a recess, the plunger is in engagement with the thread of the spindle, while during the transfer over the section between two locking recesses the plunger is lifted out of the spindle.
  • the distance of the locking recesses may simultaneously be defined the rhythm in which developer is added.
  • the locking recesses arranged in a periphery of a disc are so spaced relative to the thread of the spindle and the angle of rotation of the shaft that the adjustable stop can be moved as a function of the rotation of the rod only by an amount such that the engaging end of the plunger is movable through a fraction or a multiple of a rotation of the shaft along the switching cam.
  • the preferred embodiment of the invention consists substantially of a plunger movable towards the delivery valve and pivotable at its remote end wherein the remote end is adapted to be carried along at variable distance from a switching cam in a transport mechanism, in accordance with the passage of paper, wherein the transport mechanism also operates the switching cam in a defined manner.
  • the storage tank is mounted vibratable and vertically movably in a housing of the developing device, and the delivery valveis substantially below the operating end of the plunger and has a downwardly springbiased valve body which rests on the actuating pin, fixably mounted on the developing device and passing through the delivery orifice. Owing to the vertically movable arrangement the content of the storage tank is shaken with every operation, ensuring the good mixing of the supply and the uniform flowable condition, as well as preventing a sedimentation of the toner particles.
  • the delivery valve projects downwardly from the storage tank into a dish through which the developing fluid is pumped causing it to flowpast the delivery arrangement of the delivery valve with its valve body.
  • the delivery valve is a twin valve of which the delivery orifice with the valve body are arranged in the lower wall of the storage tank, and another valve member in the upper wall of the storage tank, the latter being biased by a spring towards the top and closing a venting hole in the top wall of the tank, wherein the actuating end acts on this valve member.
  • venting prior to an actuation of the valve body prepares the release of a metered amount.
  • the venting is of short duration because the valve member is a dual seat valve and opens the venting hole briefly against the spring bias.
  • the metering is further improved by a stop located above the valve body which is mounted in a chamber of the delivery valve and in that the valve body closes the chamber after being lifted off its seat by resting on the stop, thus closing the connection to the interior of the storage tank.
  • FIG. 1 is a diagrammatical side elevation of a copying apparatus explaining its functional parts
  • FIG. 2 is aside elevation of the device according to the invention, partly broken away;
  • FIG. 3 is a view of FIG. 2 seen from the right;
  • FIG. 4 is a view of FIG. 3 seen from the left, on a reduced scale
  • FIG. 5 is a view corresponding to FIG. 2, on a reduced scale with the front wall detached and partly in cross section;
  • FIG. 6 is atop view of FIG. 2 on a reduced scale
  • FIG. 7 is a development of a part of FIG. 2;
  • FIG. 8 is a diagrammatical top view of the developing device without storage tank.
  • FIG. 9 is a diagrammatical cross section along the line IX- IX in FIG. 8 including the storage tank and the operating end ofthe plunger;
  • FIG. 10 is a partial view of one end of the storage tank with the delivery valve and a valve operating pin, partly in cross section.
  • the copying apparatus of FIG. 1 has on the top 1 a frame 2 under which an original can be passed in the direction of the arrow along an exposure plate 4.
  • the exposure mechanism 5 can be controlled by limit switches 6, 7 which also initiate other functions.
  • the copying papers are contained in a stack 8.
  • Withdrawing device 9. with a roller 10 on the top sheet of the stack is controlled intermittently by the switches 6, 7 and a switch 11 in the withdrawing device.
  • a roller 12 is flattened and forms a so-called switching roller so associated with a counterpressure roller 13 that that uncut periphery of the switching roller makes engagement with the counterpressure roller.
  • the withdrawing device 9 is stationary when the switch 11 is actuated by an advancing sheet of copying paper and it is released, e.g., when the switch 7 is actuated by an original.
  • the copying paper is transported along the path 14 by continuously revolving rollers along an exposure platform 15 and'through the developing tank 16 through a heating and drying device 17 to a discharge 18.
  • a storage tank 19 with developing substance is mounted above the developing tank.
  • the storage tank has a downwardly opening metering valve the upper end of which can be pushed by a plunger 21.
  • This plunger is mounted in a control mechanism shown generally at 22, described in detail further below extending to the level of the switching roller 12.
  • An operating rod 23 extends from the control mechanism to the top surface .1 for making adjustments for adding developer.
  • actuating and control means and connecting means with leads 116 to the switches 6, 7, connecting leads 117 to the exposure light sources 118 and gear connections -123 to the devices to' be actuated, such as rollers, along the paper path 14 and to the control mechanism 22. In the latter the roller 12 revolves once during the delivery of one sheet from the stack 8.
  • FIG. 2 the rotatable actuating rod 23 may be seen, equipped with an operating handle 24 passing from the top surface, as well as the switching roller 12 and the storage tank 19 with the operating end 20 of the delivery valve.
  • a threaded spindle 25 is mounted nonrotatably on the axial extension of the roller 12 and has its other end located in a bearing 26.
  • This bearing is mounted in a sporting wall 27, shown by dotted lines, extending parallel to the plane of the drawing in FIG. 1, and arranged within the housing 124 on one side thereof.
  • a carrier crosshead 28 is mounted on the wall 27, e.g., by fixing lugs 29, 30 shown in FIG. 4 and a bearing bracket 31, e.g., via a lug 32 (FIG. 4) possibly by screwing.
  • the lower end of the actuating rod 23 is located rotatably but not vertically movably in the bearing bracket 31, e.g.,.the thread 32 provided at the lower end of the rod for fixing certain elements may pass through the bracket 31.
  • the lower end 33 may carry a locknut not shown.
  • FIG. 4 shows that the wall of the plunger guide, which is in front of this drawing, has slots 41, 42, 43 extending perpendicularly to the longitudinal direction of the plunger, and through which engage guide lugs 44, 45, 46. These guide lugs are widened behind the slots and form a parallel guide, which is secured against loss after the installation.
  • a transverse rod 47 serving as abutment for a spring 48 directed obliquely upwardly relative to the top position of the plunger 39 defined by the spindle 25, and hooked at 49 into the carrier crosshead 28. In this manner the plunger 39 is biased both towards the top for engagement into the spindle 25 and in the direction of a pivotable movement in a clockwise sense.
  • the lower end of the plunger carries through a spring support 50 the operating member 51 forming the lower end 21 of the plunger.
  • the movability of the operating member 51 relative to the plunger makes possible the operation of the delivery valve in two stages.
  • the upper end 40 of the plunger 39 has a center web 52 which engages into the thread of the spindle 25.
  • a step 53 is provided, along which the threads move when the web engages into the thread.
  • a lower step 54 is arranged on the other side of the web 52 so that a switching cam 55 can move past the web 52 prior to engaging the step 53.
  • the switching cam 55 may be kidney shaped, as shown in FIGS. 3 and 4 and extends over slightly more than 180 of the periphery of the spindle 25.
  • FIG. 5 shows in detail that the switching cam follows the shape of a thread.
  • the switching cam 55 can engage with its periphery 56 the step 53 and push the plunger 39 in its guide 48 against the spring 48 towards the bottom to operate the element 20.
  • the switching cam 55 is mounted axially and peripherally rigidly on the spindle 25. The deeper step 54 enables the cam 55 to move past the back of the rod 52 immediately prior to its engagement into the step 53.
  • An adjusting stop 57 is mounted after the manner of a slide on the crosshead 28 and may be guided on an upper web 79 of a sidewall 34 of the crosshead 28. At the level of an abutment 58 for the high may engage behind an inwardly directed projection on the wall 34, not shown in detail.
  • the lug 58 extends into the path of the plunger 39 or plunger guide 38 when pivoted above the pivots 36, 37.
  • an arm 59 with an upwardly directed operating pin 60 extends through a hole in the wall 27.
  • This pin engages into an adjusting device 61 rigidly mounted on the operating rod.
  • This adjusting device is disc shaped and has at its lower end a worm track 62 approaching from an inlet 63 at the periphery gradually the center zone. It may be seen that, by rotating the adjusting rod 23, the pin may be moved to and fro across the radius of the disc 61. The radius is so dimensioned that, within the widest limits of adjustment the lug 28 may be retracted so far that the end 40 of the plunger 39 is moved to the right-hand end of the spindle as viewed in FIG. 2.
  • the actuating rod 23 carries also an adjusting mechanism 64 for a pivoting lever 65, mounted pivotably about a pivot 66 in the crosshead 28. This pivot extends parallel to the pivots 36, 37.
  • the end 67 extending into the carrier crosshead overlies an abutment arranged in the plunger 39.
  • the other end has a downwardly angle abutment 69 which is pulled downwardlyby a spring 70 between the adjacent end of the pivoting lever 65 and the bracket 31.
  • the adjusting device 64 is disc shaped and has a cylindrical actuating ring 71, the development of which is shown in FIG. 7.
  • On the upper side are locking recesses 72. These recesses have a depth such that, with the abutment head 69 in engagement, the pivoting lever 65 is in a position in which the end 40 of the plunger 39 engages into the thread of the spindle 25.
  • the lever 65 is pivoted in an anticlockwise direction on the sections 73 between the recesses 72, as viewed in FIG. 2 so that the plunger 39 is moved against the action of the spring 48 towards the bottom and out of engagement with the spindle 25.
  • the spring 48 can pivot the plunger 39 in a clockwise direction as viewed in FIG. 2 in order to determine a starting position selected by the adjustable stop 57.
  • the plunger is equipped with a spring pawl 74 which cooperates with a return lug 75 provided on the adjusting stop and extending along the upper part of its guide section. As shown particularly in FIG. 6 it is recessed at 76 immediately in front ofthe lug 58.
  • the spring pawl is bent at its upper end towards the return lug 75 and the latter is correspondingly chamfered at its upper end.
  • the arrangement is such that with the plunger in its top position, i.e., engaging into the spindle 25, the pawl and the return lug can pass each other.
  • the bent end of the spring pawl 74 engages under the return member 75.
  • the spring 48 can now pivot the plunger 39 in a clockwise direction as viewed in FIG. 2 without the end 40 engaging into the thread of the spindle 25, until the plunger 39 reaches the lug 58. In this position the pawl 74 can move upwardly through the recess 76 so that the spring 48 pulls the plunger 39 towards the top into engagement with the spindle 25.
  • the rotation of the operating rod 23 is limited to 360 by a stop on the underside of the adjusting device 64.
  • This stop is associated with an abutment on the bracket 31 not shown in detail.
  • FIGS. 8-10 show a preferred embodiment of the storage tank, 19 in FIG. 1 in connection with the associated parts of the developing tank shown at 16 in FIG. 1.
  • a guide track also shown in FIG. 1 is arranged at 80 below a cover plate 81 and is accessible from the top through slots 82, 83. Underneath this guide track and underneath the cover plate 81, there is a trough-shaped intermediate bottom 84 underneath which is a chamber 85 containing the developing fluid. From this chamber the developing fluid is pumped by a pumping arrangement 86, indicated diagrammatically, into the guide track from which it flows through an overflow into the recess and back into the chamber 85.
  • a pumping arrangement 86 indicated diagrammatically, into the guide track from which it flows through an overflow into the recess and back into the chamber 85.
  • the cover plate 81 has a recess 88, the dimensions of which correspond to those of the storage tank shown at 87 in FIGS. 9 and 10. At both ends of the recess there are supports 89, of which the support 90 is higher than the support 89, in view of the shape of the storage tank 87. In the recess 88 arranged adjacent to the guide track the storage tank 87 rests with one end on the support 89 while its other end, forming a projection 91 is held spaced apart above the support 90, by means described below. A low position of the storage tank is defined by resting the lug 91 onthe support 90.
  • the storage tank has a discharge valve with a delivery arrangement 92 and a venting arrangement 93, described in detail with reference to FIG. 1 and of which the former projects from the bottom of the storage tank while the latter is arranged in thetop wall of the storage tank.
  • the trough 84 has a recess 94 comprising for example a cylindrical wall 95 and abottom 96.
  • the cylindrical wall is recessed at 97 (FIG. 8) enabling liquid entering the recess to flow off.
  • an actuating pin 98 extends upwardly to act as a valve member.
  • the discharge orifice 99 is arranged at the bottom of the delivery arrangement 92.
  • a plate 100 with a valve seat 101, defining the discharge orifice and cooperating with the spherical valve body 102.
  • This valve body is located in a chamber 103 which is below the actual storage tank and has, above the valve body, an annular abutment 104, adapted to the shape of the valve body and against which the same rests when it is lifted off the valve seat 100, no seal is required at this point.
  • a spring 105 is mounted in this chamber, acting on the valve body 102 from the top and urging it on to the valve seat 100.
  • the upper spring mounting 106 has lateral recesses 107 through which developing fluid can flow between the abutment 104 and the valve body 102 into the chamber 103.
  • a discharge hole 108 in the trough 84 is so restricted, relative to the pumped I on the edge of the hole 109 when the venting arrangement is actuated by theplunger, providing in practice a dual seat valve which opens the passage through the venting device only for a short duration.
  • the plate spring 113 is weaker than the spring 115 so that on actuation by the plunger, first the venting hole is briefly opened and then the discharge orifice opened.
  • a copying apparatus comprising tank means for holding a developing medium, storage means for holding replenishing substance for the developing medium, delivery valve means connected to said storage means for supplying the substance to said tank means, advancing means for moving copy material to said tank means, movable mechanical means arranged to perform a continuous motion during passage of the coping material past the mechanical means, transport means engaging said mechanical means for moving mechanically in a single direction over a continuous path during movement of said mechanical means, valve-actuating means movable by said transport means between two positions for actuating said valve means when it reaches one of the positions, return means for moving said actuating means to the other position, said valve-actuating means moving cumulatively toward the one position for each movement of said mechanical means, and adjustment means for adjusting the location of one of the two positions.
  • valve-actuating means includes a first member engaging said valve means and moving with said transport means and a second member located at the second position for momentarily disengaging said first member.
  • said mechanical means engages said copying material and rotates in response to movement of the copying material
  • said transport means includes a screw device rotating with said mechanical means
  • said actuating means includes a first member engaging said screw device for translatory movement in response to rotation of said screw device and a second member rotating with rotation of said screw device at one end thereof and striking said first member so as to disengage it from the screw device and actuate said valve means.
  • an improved developing device comprising a developing tank containing the developing medium, a storage tank containing a substance for replenishing the developing medium and arranged on the developing tank, a delivery valve in the said storage tank adapted to be operated to supply the said substance to the developing medium in the said developing tank, wherein the improvement comprises an element arranged in the copying apparatus and moving in conjunction with the passage of copying material, actuating means arranged between the said element and the said delivery valve to move the latter as a function of the movement of the element, and comprising a movable transport device, connecting means between the transport device and the element in order to actuate the transport device in accordance with the movement of the element, wherein the connecting means comprise a plunger engaging on the one hand into the transport device and movable thereby, and connected operatively with the delivery valve, wherein the engagement between the plunger and the transport device causes the transport of the engaging end of the plunger wherein the device comprises a switching cam located in the transport path of the transport device and towards which the plunger is
  • valve body is spherical and the valve seat comprises a plate on to which the valve body is pressed by the spring means, wherein the valve body and the plate are arranged in a lower wall of the storage tank and a further valve member is mounted opposite in an upper wall, which has an opening through which the said further valve member passes, further spring means being provided urging the further valve member in one direction so that it covers the opening, wherein further the operating end of the plunger is connected with the said further valve member lifting the same off the opening against the said further spring means, in order to open the opening and permit a flow of air, wherein the said further spring means are weaker than the spring means for the valve body so as to open during a movement of the plunger, first the said top opening and then to move the storage tank against the spring means, lifting thereby the valve body and opening the delivery opening, and bringing the storage tank into contact with the second abutment.
  • the storage tank has a projection containing the valve body of the delivery valve and the lower end of which has arranged thereon the closing plate with the valve seat, wherein a limit stop is provided in spaced relationship above the closing plate for the valve body and the distance is so dimensioned that, when the valve body has been lifted off the valve seat, it rests against the stop which forms a valve seat between the valve body and the interior of the storage tank, wherein the interior of the storage tank is closed during its downward movement towards the second abutment by the valve body resting against the said stop, and a chamber is formed between the stop and the closing plate which ensures the metering of the amount of the substance to be delivered during one downward stroke of the storage tank.
  • an improved developing device comprising a developing tank containing the developing medium, a storage tank containing a substance for replenishing the developing medium and arranged on the developing tank, a delivery valve in the said storage tank adapted to be operated to supply the said substance to the developing medium in the said developing tank, wherein the improvement comprises an element arranged in the copying apparatus and moving in conjunction with the passage of copying material, actuating means arranged between the said element and the said delivery valve to move the latter as a function of the movement of the element, and a movable transport device, connecting means between the transport device and the element in order to actuate the transport device in accordance with the movement of the element, wherein the connecting means comprise a plunger engaging on the one hand into the transport device and movable thereby, and connected operatively with the delivery valve, wherein the engagement between the plunger and the transport device causes the transport of the engaging end of the plunger, wherein the device comprises a switching cam located in the transport path of the transport device and towards which the plunger is moved
  • a device as set forth in claim 9 comprising an adjustable actuating arrangement, connecting means between the carrier crosshead and the actuating arrangement, wherein the adjusting stop is movable in the axial direction of the transport device from one limit position near the switching cam into another further removed therefrom, comprising an adjusting device for the adjusting stop to move the same, wherein the said adjusting device is connected with an adjusting mechanism connected to a pivoting lever and comprising further means between the pivoting lever and the plunger in order to lift the plunger against the action of the spring out of the transport device during an adjustment of the adjusting stop.
  • the locking disk has a locking recess with a smaller depth than that of the other locking recesses and so dimensioned that, when the plunger engages through the pivoting lever into this locking recess it is out of engagement with the spindle.
  • an improved developing device comprising a developing tank containing the developing medium, a storage tank containing a substance for replenishing the developing medium and arranged on the developing tank, a delivery valve in the said storage tank adapted to be operated to supply the said substance to the developing medium in the said developing tank, wherein the improvement comprises an element arranged in the copying apparatus and moving with each passage of copying material, actuating means arranged between the said element and the said delivery valve to move the latter as a function of the movement of the element, a
  • the connecting means comprise a plunger engaging the transport .device and movable thereby and connected operatively with the delivery valve, wherein the engagement between the plunger and the transport device causes the transport of the engaging end of the plunger, said device comprising a switching cam located in the transport path of the transport device and towards which the plunger is moved, said plunger being actuated by the said switching cam to operate the delivery valve, and an adjusting stop on the transport device provided as guide for the plunger after an operating stroke thereof under the action of the switching cam, while the engagement between the transport device and the plunger is released and the plunger is moved back after the operating stroke opposite the movement of the transport device,
  • an improved developing device comprising a developing tank containing the developing medium, a storage tank containing a substance for replenishing the developing medium and arranged on the developing tank, a delivery valve in the said storage tank adapted to be operated to supply the said substance to the developing medium in the said developing tank, wherein the improvement comprises an element arranged in the copying apparatus and moving in conjunction with the passage of copying material, actuating means arranged between the said element and the said delivery valve to move the latter as a function of the movement of the element, and comprising a movable transport device, connecting means between the transport device and the element inorder to actuate the transport device in accordance with the movement of the element, wherein the connecting means comprise a plunger engaging on the one hand into the transport device and movable thereby, and connected operatively with the delivery valve, wherein the engagement between the plunger and the transport device causes the transport of the engaging end of the plunger, wherein the device comprises a switching cam located in the transport path of the transport device and towards which the plunger

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Photographic Developing Apparatuses (AREA)
  • Wet Developing In Electrophotography (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)
  • Photoreceptors In Electrophotography (AREA)
US818701A 1968-04-26 1969-04-23 Developer replenishing device for copying apparatus Expired - Lifetime US3641907A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681772295 DE1772295C (de) 1968-04-26 Entwicklungsvorrichtung für Kopier gerate

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US3641907A true US3641907A (en) 1972-02-15

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US818701A Expired - Lifetime US3641907A (en) 1968-04-26 1969-04-23 Developer replenishing device for copying apparatus

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US (1) US3641907A (xx)
JP (1) JPS5040346B1 (xx)
BE (1) BE732086A (xx)
CH (1) CH493866A (xx)
DK (2) DK133641C (xx)
FR (1) FR2006984A1 (xx)
GB (1) GB1266954A (xx)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3828172A (en) * 1973-06-04 1974-08-06 Eastman Kodak Co Replenishment controller for photographic processors
US5461466A (en) * 1994-05-02 1995-10-24 Hewlett-Packard Company Dripless seal for a liquid toner cartridge

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112196636B (zh) * 2020-09-29 2021-06-08 中国航发动力股份有限公司 一种基于推紧顶具的发动机放气机构装配方法及推紧顶具

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3202072A (en) * 1962-02-17 1965-08-24 Lumoprint Zindler Kg Apparatus for treating sheets of film base
US3354802A (en) * 1964-07-22 1967-11-28 Savin Business Machines Corp Toner monitoring system for electrostatic copier
US3504968A (en) * 1966-05-31 1970-04-07 Pitney Bowes Inc Toner dispensing apparatus for electrostatic copying machines
US3514203A (en) * 1964-05-11 1970-05-26 Scm Corp Automatic toner replenisher

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3202072A (en) * 1962-02-17 1965-08-24 Lumoprint Zindler Kg Apparatus for treating sheets of film base
US3514203A (en) * 1964-05-11 1970-05-26 Scm Corp Automatic toner replenisher
US3354802A (en) * 1964-07-22 1967-11-28 Savin Business Machines Corp Toner monitoring system for electrostatic copier
US3504968A (en) * 1966-05-31 1970-04-07 Pitney Bowes Inc Toner dispensing apparatus for electrostatic copying machines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3828172A (en) * 1973-06-04 1974-08-06 Eastman Kodak Co Replenishment controller for photographic processors
US5461466A (en) * 1994-05-02 1995-10-24 Hewlett-Packard Company Dripless seal for a liquid toner cartridge

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Publication number Publication date
DK133641B (da) 1976-06-21
CH493866A (de) 1970-07-15
DK133641C (da) 1976-11-08
BE732086A (xx) 1969-10-01
GB1266954A (xx) 1972-03-15
FR2006984A1 (xx) 1970-01-02
DE1772295A1 (de) 1970-10-29
JPS5040346B1 (xx) 1975-12-23
DK122419B (da) 1972-02-28
DE1772295B2 (de) 1973-02-01

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