US3861613A - Apparatus for operating cassette of photosensitive element in electrophotographic copier - Google Patents

Apparatus for operating cassette of photosensitive element in electrophotographic copier Download PDF

Info

Publication number
US3861613A
US3861613A US345381A US34538173A US3861613A US 3861613 A US3861613 A US 3861613A US 345381 A US345381 A US 345381A US 34538173 A US34538173 A US 34538173A US 3861613 A US3861613 A US 3861613A
Authority
US
United States
Prior art keywords
roller
take
shaft
stock
tension
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
US345381A
Other languages
English (en)
Inventor
Susumu Tanaka
Yuji Enoguchi
Takao Fujiwara
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.)
Minolta Co Ltd
Original Assignee
Minolta Co Ltd
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 Minolta Co Ltd filed Critical Minolta Co Ltd
Application granted granted Critical
Publication of US3861613A publication Critical patent/US3861613A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • G03G15/75—Details relating to xerographic drum, band or plate, e.g. replacing, testing
    • G03G15/754—Details relating to xerographic drum, band or plate, e.g. replacing, testing relating to band, e.g. tensioning

Definitions

  • the present invention relates to an apparatus for operating a cassette of photosensitive element in electrophotographic copiers of the image transfer type, more particularly to an apparatus for operating a photosensitive element cassette to be loaded in an electrophotographic copier of the electrostatic latent image transfer type in which an electrostatic latent image formed on the photosensitive element is transferred to copy paper or of the powder image transfer type in which the electrostatic latent image on the photosensitive element is visualized with a powdered toner and the visualized image is then transferred to copy paper.
  • a sheet of photosensitive element in the form of a belt supported in a cassette is driven reciprocally to be subjected to charging, exposure and image transfer operation during the forward travel and to return after the completion of image transfer.
  • the photosensitive element is housed in the cassette in such manner that the fresh portion of the photosensitive element is accommodated in a stock roller supported in the cassette and the fatigued portion due to repeated use is wound up into a take-up roller similarly supported in the cassette.
  • electrophotographic copiers of the image transfer type require a mechanism for winding up the fatigued photosensitive portion into the take-up roller and pulling out a required length of fresh photosensitive portion, a mechanism for imparting a suitable tension to the photosensitive element during operation to keep the same planar at the exposure station, and a mechanism for holding the element in intimate contact with copy paper at the transfer station so as to travel the element at the same speed as the copy paper and to effect the image transfer.
  • These mechanisms must be incorporated into the copier and so constructed that when the cassette is loaded in the copier they will be coupled to the stock roller and the take-up roller for a trouble-free operation.
  • An object of this invention is to provide an apparatus for operating a cassette of photosensitive element to be loaded in electrophotographic copiers of the image transfer type by which a fatigued portion of the sheet of photosensitive element can be wound up and a specifled length of fresh photosensitive portion can be pulled out from a stock roller full-automatically.
  • Another object of this invention is to provide an apparatus of the type described for imparting a suitable tension to the operative portion of the photosensitive element to keep the same planar at the exposure station and to assure intimate contact between the element and copy paper at the transfer station.
  • Another object of this invention is to provide an apparatus as described with a compact construction so as to be accommodated in a small space.
  • Still another object of this invention is to provide an apparatus of the type described which operates reliably and which can be controlled automatically with ease.
  • the cassette of photosensitive element comprises a stock roller rotatably supporting therein a stock shaft for stocking a sheet of photosensitive element in the form of a wound-up belt and formed with a slit for pulling out the photosensitive element wound up on the shaft, a guide roller for supporting the photosensitive element pulled out from the stock roller, a take-up roller rotatably supporting therein a take-up shaft for winding up a fatigued portion of the photosensitive element and formed with a slit for passing the photosensitive element to be wound up on the take-up shaft. and a frame for supporting the rollers rotatably.
  • the guide roller is driven by a drive roller of the copier in rolling contact therewith, whereby the operative portion of the photosensitive element extending between the stock roller and the take-up roller is travelled back and forth for a copying operation.
  • the apparatus according to this invention for operating the photosensitive cassette comprises coupling means engageable with the stock shaft and the take-up shaft respectively and engageable with the stock roller and the take-up roller individually selectively and to thereby couple each of the rollers with the shaft housed therein for conjoint rotation, tension means engageable with and disengageable from the stock roller and the take-up roller to bias the two rollers in directions opposite to each other when in engagement therewith and to thereby tension the photosensitive element extending between the rollers, drive means engageable with and disengageable from the coupling means that is engageable with the take-up shaft to selectively engage with the take-up roller, the drive means being operable to drive the take-up shaft and the take-up roller in se quence when in engagement with the coupling means and to pull out the same from the stock roller, and operation means for controlling the operation of the tension means and the coupling means to successively effect the release of the photosensitive element from the tension, winding-up operation by the take-up shaft, operation by the take-up roller to pull out the photosensitive element and operation
  • the tension means gives a suitable tension to the operative portion of the photosensitive element all the time to keep the element planar at the exposure station and to assure intimate contact of the element with copy paper.
  • the drive means and the operation means operate very accurately in an orderly manner under the control of electrical control means incorporated in the copier and renders the cassette of photosensitive element operable full-automatically.
  • FIG. I is a view in section showing the construction of principal part of an electrophotographic copier of the image transfer type, particularly of the electrostatic latent image transfer type;
  • FIG. 2 is a view in section showing an example of the cassette of photosensitive element
  • FIG. 3 is a plan view partly in section showing the photosensitive element cassette
  • FIG. 4 is a perspective view of an embodiment of the present invention which illustrates the details of a coupling portion between the rollers in the cassette of photosensitive element and operation means therefor;
  • FIG. is a perspective view showing a cassette loading station in the embodiment of this invention.
  • FIG. 6 is a perspective view showing the details of the operation means
  • FIG. 7 is a side elevation in section showing the details of tension means.
  • FIGS. 8(A), (B), (C) and (D) are plan views partly in section illustrating the operation of the embodiment of this invention, FIG. 8(D) particularly showing a cylinder cam in development.
  • FIG. 1 shows an embodiment of electrophotographic copier of the electrostatic latent image transfer type.
  • document D is placed face down on a document glass I and is illuminated by an iodine lamp L supported on an exposure system 2.
  • the reflected light from the surface of the document is led by planar reflecting mirrors M1, M2, M3 and M4, image-forming lens 3 and exposure slit 4 to a photosensitive element P to form thereon the image of the document in the form of an electrostatic latent image.
  • the exposure system 2 in the illustrated apparatus comprises first movable means including the iodine lamp L and planar reflecting mirror Ml, second movable means including planar reflecting mirrors M2 and M3, and stationary means including the image-forming lens 3, planar reflecting mirror M4 and exposure slit 4.
  • first movable means including the iodine lamp L and planar reflecting mirror Ml
  • second movable means including planar reflecting mirrors M2 and M3
  • stationary means including the image-forming lens 3, planar reflecting mirror M4 and exposure slit 4.
  • the first movable means L and M1 travel at a velocity of v from the solid line position to the broken line position in the drawing, while the second movable means M2 and M3 travel at a velocity of v/2 from the solid line position to the broken line position in the drawing, with the light path from the document surface to the image-forming lens 3 maintained at a constant length, so that the image of the original is formed on the photosensitive element P which travels at the same velocity v as the first movable means L and MI in synchronism therewith.
  • the photosensitive element P extends from a stock roller 5 to be described later to a takeup roller 6 by way of a guide roller 7 and is travelled at the velocity v by the guide roller 7 which is driven by a drive roller Disposed along the path of travel of the photosensitive element P are a cleaner 9, charger 10 the exposure slit 4, an eraser l1 and a transfer roller 12 for the cleaning, charging and exposure of the photosensitive element and the transfer of electrostatic latent image during the forward travel of the element P as already known.
  • the eraser ll eliminates residual charges.
  • Copy paper 13 in the form of a roll for bearing the latent image to be transferred thereto is accommodated in the machine.
  • the leader portion of the paper pulled out from the roll is cut to a specified size by a cutter I4, and the cut-off sheet is brought into intimate contact with the latent image bearing surface of the photosensitive element P for the transfer of electrostatic latent image.
  • the copy paper 13 is then separated from the photosensitive element F and supplied with a toner by a developing unit 15, whereby the latent image is visualized.
  • the paper is thereafter transported on a belt 16 while the image is being fixed by a fixing unit 17 and is finally sent out onto a copy tray I8.
  • the cycle of copying operation described is typically of the mode of operation performed by one embodiment of electrophotographic copier of the electrostatic latent image transfer type.
  • electrophotographic copier of the power image transfer type With an electrophotographic copier of the power image transfer type, a powdered toner is applied onto the photosensitive element P by a developing unit (not shown) immediately before the image is transferred, so as to visualize the electrostatic latent image. After the image transfer, fixing alone is conducted. with the developing step eliminated.
  • the present invention is not limited only to application for the copier of FIG. 1 but is adapted for electrophotographic copiers of both the latent image transfer type and the power image transfer type.
  • a photosensitive element cassette C comprises a frame 20, and the stock roller 5, take-up roller 6 and guide roller 7 which are rotatably supported by the frame 20.
  • the stock roller 5 has in its interior space a shaft 21 which is supported rotatably with respect to the roller 5.
  • One end of the photosensitive element P in the form of a sheet is fixed to the shaft 21 and the fresh photosensitive portion is accommodated in the roller 5.
  • the other end of the photosensitive element P is pulled out a required length from the roller 5 through a slit 5a therein. and part of the pulled out portion is wound around the stock roller 5 several turns.
  • the photosensitive portion is then passed along a guide face 20a of the frame 20 and over the guide roller 7 disposed at an end of the guide face 20a.
  • the leader end is then inserted into the roller 6 through a slit 6a therein and secured to a takeup shaft 22 which is positioned within the interior space of the roller 6 and supported rotatably with respect to the roller 6.
  • part of the photosensitive portion when fatigued through repeated use for copying operation, is taken up on the shaft 22 and is thereby accommodated within the take-up roller During the forward travel of the photosensitive element P for the copying operation, the take-up roller 6 winds up the operative portion of the photosensitive portion driven by the guide roller 7 and, during the backward travel of the photosensitive element, the wound-up portion of the photosensitive element P is unwound.
  • the apparatus of this invention includes operation means for winding up the repeatedly used and fatigued portion of the photosensitive element into the take-up roller 6 and for pulling out a required length of unused fresh photosensitive portion from the stock roller 5, means for imparting proper tension to the operative photosensitive portion to keep the same planar at the exposure station and means for effecting intimate contact of the photosensitive element with the copy paper at the transfer station.
  • the stock roller 5 and takeup roller 6 supported by the frame 20 of the cassette C have inner holes for rotatably supporting the shafts 21 and 22.
  • the inner holes are splined as at 5b and 6b,
  • the shafts 21 and 22 in the rollers 5 and 6 are formed at their ends with splined holes 21a and 22a having a smaller diameter than the splined holes 5b and 6b.
  • the cassette loading station 23 of the copier is provided, as seen in FIG. 5, with cassette guides 26 and 27 fixed at their opposite ends to the opposing side plates 24 and to support the cassette frame 20 thereon.
  • the loading station 23 is further provided with the drive roller 8 for travelling the photosensitive element P in timed relation to the movement of the first and sec ond movable means of the exposure system 2, the drive roller being adapted to be driven by unillustrated means.
  • the drive roller 8 is in the form of a stepped roller comprising rubber rollers 29 for rotating the guide roller 7 by contact with the peripheral surface of its opposite ends and a shaft 28 for fixedly carrying the roller 29, the construction being such that the drive roller 8, out of contact with the surface of the photosensitive element P, drives the element P through the guide roller 7.
  • the side plate 25 rotatably supports tubular shafts 30 and 31 rotatably supporting roller coupling rods 32 and 33 in their inner holes respectively.
  • the tubular shafts 30 and 31 are fixedly provided at their ends with discs 34 and 35, respectively.
  • pins 340 and 350 on the discs 34 and 35 engage with coupling pins 50 and 60 on the stock roller 5 and take-up roller 6 respectively, rendering the tubular shafts 30 and 31 rotatable with the stock roller 5 and take-up roller 6 respectively.
  • the roller coupling rods 32 and 33 are stepped at their ends to provide splined portions 320, 33a and splined portions 32b, 33b, the former splined portions being greater than the latter in diameter.
  • the splined portions 32a and 32b are engageable in splined holes 5b and 21a of the stock roller 5 and shaft 21 respectively, and the splined portions 330 and 33b are engageable in the splined holes 6b and 22a of the take-up roller 6 and shaft 22.
  • the engagement of the splined portions 32a and 32b in the splined holes 5b and 21a respectively couples the stock roller 5 to the shaft 21, whereas the disenagment of the splined portion 320 from the splined hole 5b frees the roller from the shaft.
  • the engagement of the splined portions 33a and 33b in the splined holes 6b and 22a respectively couples the take-up roller 6 and its shaft 22 together, while the disengagement of the splined portion 33b from the splined hole 6b releases the roller 8 from the shaft 22.
  • the tubular shafts 30 and 31 extend rearward through the side plate 25 to fixedly carry tension delivering gears 36 and 37 respectively.
  • the coupling rods 32 and 33 extend through the tubular shafts 30 and 31 and project therefrom further rearward.
  • the delivering gears 36 and 37 are meshable with tension gears and 41 rotatably supported on a shaft 38 extending between the side plate 25 and a side plate 38 behind the plate 25.
  • the gears 40 and 41 are connected together by a spiral tension spring 42 interposed therebetween and having one end connected to the gear 40 and the other end secured to the gear 41.
  • the tension spring 42 suitably tensioned, exerts a force on the gears 36 and 37 to urge the gears in opposite directions when the gears 36 and 37 come into meshing engagement with the tension gears 40 and 41 respectively, with the result that through the coupling pins 34a and 35a on the disc 34 and 35, the spring urges the stock roller 5 and the take-up roller 6 in such directions as to tension the photosensitive element P.
  • a shaft 43 projecting from the front of the machine body and provided with a knob 44 (see FIG. 5) at its end.
  • the other end of the shaft 43 is rotatably supported by the side plate 38.
  • a stationary gear 45 meshable with the tension gear 41 is fixed to the side plate 38.
  • the stationary gear 45 rotatably supports the rear end of the shaft 43.
  • the stationary gear 45 may be replaced by an engaging member such as a pin that is engageable with a tooth of the tension gear 41.
  • the shaft 43 fixedly carries a gear 46 meshable with the other tension gear 40.
  • a gear 46 meshable with the other tension gear 40.
  • a cylinder cam 50 on a shaft 49 extending between the side plates 25 and 38 as shown in FIG. 6 governs the shifting of the tension gears 40 and 41 on the shaft 39 for engagement with the tension delivering gears 36 and 37 or with the spring tensioning gears 45 and 46 and also governs the coupling of the stock roller 5 with its shaft 21 and coupling of the take-up roller 6 with its shaft 22 (i.e., coupling and uncoupling between the relevant splined portions) by means of the coupling rods 32 and 33.
  • the cylinder cam 50 is formed in its circumferential surface with two cam grooves 50a and 50b.
  • An actuating plate 51 having a driven portion 51a engaged in the cam groove 50a is pivotally supported by a pin 53 on a bracket 52 secured to the side plate 25.
  • the actuating plate 51 has a forked upper end 51b engaged in a groove 400 formed in the assembly of the tension gears 40 and 41.
  • An inverted L-shaped actuating plate 56 has at its lower end a driven protion 56a engaged in the other cam groove 50b, the actuating plate 56 being supported by a pin 55 on a bracket 54 secured to the side plate 38.
  • the upper portion of the actuating plate 56 has one end 56b held in engagement with the end of the coupling rod 32 by a washer 32c and the other end 56c held in engagement with the end of the coupling rod 33 by a washer 33c.
  • the actuating plate 51 causes the tension gears 40 and 41 to move slidingly on the shaft 39, and the actuating plate 56 causes the coupling rods 32 and 33 to slide within the tubular shafts 30 and 31 axially thereof.
  • the cam grooves 50a and 50b of the cylinder cam 50 are so shaped as shown in FIG. 8(D) in development. The operation of the cam will be described later.
  • a rotary solenoid 57 governs the rotation of the cylinder cam 50.
  • the rotary solenoid 57 rotates through l20 (one-third of one revolution) at a time, and the torque is delivered to the cylinder cam 50 through claw clutches 58 and 59.
  • suitable electrical means such as programming control circuit (not shown)
  • the rotary solenoid 57 is adapted to be actuated into operation when the photosensitive element cassette C is loaded and when a fatigued photosensitive portion is wound up and a fresh portion is pulled out.
  • the rod 33 for coupling the take-up roller 6 with its shaft 22 is provided at its rear end with a driven gear 60 which is meshable with drive gears 62 and 63 on a drive shaft 61 rotatably supported by and extending between the side plates 25 and 38.
  • Indicated at 64 is a motor for driving the shaft 6].
  • the motor drives gears 67 and 68.
  • the gear 67 in turn rotates the shaft 61 through a sprocket transmission 69.
  • the other gear 68 to be driven by way of the electromagnetic clutch 66 has a cam 70 integral therewith for defining the length of the operative portion of photosensitive element P.
  • the cam 70 is in engagement with an actuator for a microswitch 71, such that the rotation of the cam 70 controls the operation of the electromagnetic clutch 66 through the microswitch 71 and thereby controls the winding of the photosensitive element P onto the take-up shaft 22 and the length of the photosensitive element P to be paid out from the stock roller 5.
  • the driven portion 51a of the actuating plate 51 and the driven portion 56a of the inverted L-shaped actuating plate 56 engage in the cam grooves 500 and 50b of the cylinder cam 50 at a position C indicated in the development of FIG. 8(D).
  • the tension gears 40 and 41 whose position is determined by the cam groove 50a are located at the position shown in FIG. 8(C) and mesh with the tension delivering gears 36 and 37 respectively, permitting the tension spring 42 to elastically act on the stock roller and the take-up roller 6 through the discs 34 and 35.
  • the roller coupling rods 32 and 33 whose position is governed by the other cam groove 50b are located at the position shown in FIG.
  • the elastic force of the tension spring 42 acts as a tension on the photosensitive element P to keep the element P planar and to fit the same intimately with the copy paper during the reciprocation of the photosensitive element for the copying operation.
  • the operative portion of the photosensitive element P is wound up around the take-up roller 6 when travelling forward and is wound up around the stock roller 5 when travelling backward.
  • the reciprocal travel of the photosensitive element P is effected by the drive roller 8 which rotates the guide roller 7 in the forward and backward directions.
  • the programming circuit in the electric control] circuit or some other operation means operates to energize the electromagnetic clutch 66, causing the motor 64 to drive the shaft 61, which in turn rotates the coupling rod 33 through the gears 62 and 60 to wind up the fatigued portion of the photosensitive element P on the take-up shaft 22. Since the tension gear 40 is out of engagement with the gear 36, the stock roller 5 permits the photosensitive element P to be unwound from its outer periphery as the winding operation proceeds. The take-up roller 6, out of rotation, allows the photosensitive element to be taken into the roller through the slit 60.
  • the electromagnetic clutch 66 Upon completion of the winding operation, the electromagnetic clutch 66 is temporarily deenergized to interrupt the transmission of the torque of the motor 64 to stop the shaft 61. At the same time, a signal is sent to the rotary solenoid 57, causing the solenoid 57 to rotate further l20C to bring the cylinder cam 50 from position A to position B in FIG. 8(D). This does not move the actuating plate 51, leaving the tension gears 40 and 41 still in meshing engagement with the gear 46 and the stationary gear 45 respectively, whereas the cam groove 50b moves the inverted L-shaped actuating plate 56, which in turn shifts the coupling rod 32 toward the direction of arrow as seen in FIG. 8(B).
  • the splined portion 32a therefore disengages from the splined hole 5! of the stock roller 5 to uncouple the stock roller 5 from the shaft 21.
  • the splined portions 3212 which has been simply shifted within the splined hole 210 is still in engagement therewith.
  • the other coupling rod 33 moves in the direction opposite to that of the foregoing movement to engages its splined portion 330 into the splined hole 6b of the take-up roller 6 and to thereby couple the take-up roller 6 with the shaft 22 for conjoint rotation.
  • the gear 60 is brought into meshing engagement with the gear 63 on the shaft 61.
  • the programming circuit or the like again energizes the electromagnetic clutch 66 to cause the motor 64 to rotate the shaft 61, which drives the coupling rod 33 through the gears 63 and 60, whereby the take-up roller 6 and its shaft 22 are driven together to wind up the photosensitive element P around the outer peripheral surface of the roller 6.
  • This winding operation rotates the shaft 21, while the stock roller remains stationary since it is uncoupled from the shaft 21, permitting a fresh portion of the photosensitive element P to be pulled out through the slit 5a.
  • the defining cam 70 which has been rotating along with the clutch 66 actuates the microswitch 71 and deenergizes the electromagnetic clutch 66 to interrupt the transmission of the torque of the motor 64.
  • the shaft 61 stops, whereupon the winding of the element around the take-up roller 6 is completed.
  • the programming circuit or the like operates to rotate the rotary solenoid further 120 and brings the cylinder cam 50 from position B to position C in FIG. 8(D), forcing the cam grooves 50a and 50b to move the actuating plates 51 and 56.
  • the gear 60 is released from the gear 63, and the splined portion 32a engages in the splined hole 5b, rendering the stock roller 5 rotatable with the shaft 21 by coupling.
  • the tension spring 42 acts on the coupling rods 32 and 33 to bias them toward directions opposite to each other and thereby tensions the photosensitive element P.
  • the drive roller 8 now drives the guide roller 7, which unwinds the photosensitive element P from the outer periphery of the take-up roller 6 and rewinds the same around the stock roller 5. The parts are thus set in position, ready for copying operation.
  • the photosensitive element extending between the stock roller 5 and the take-up roller 6 is repeatedly used thousands of times and, when the photosensitive portion gets deteriorated, the old portion is wound up into the take-up roller 6 and a fresh portion is pulled out from the stock roller 5 for use.
  • the old cassette is unloaded from the copier and replaced with a new one.
  • the respective parts are located as seen in FIG. 8(C), so that upon loading the new cassette, the machine is made ready for a copying operation. If the operative portion of photosensitive element P in the new cassette is not long enough as specified, the forcing taking-up and pulling-out operation is conducted to pay out a required length of the element.
  • An apparatus for operating an image transfer element cassette in an electrophotography copier of the image transfer type comprising:
  • coupling means engageable with a stock shaft and a take-up shaft when the cassette is loaded in place, the stock shaft and the take-up shaft being rotatably supported in a stock roller and a take-up roller rotatably supported on a frame of the cassette, the coupling means being operable to engage with the stock roller and the take-up roller individually selectively and to thereby couple each of the rollers with the shaft housed therein for conjoint rotation,
  • tension means engageable with and disengageable from the stock roller and the take-up roller to bias the two rollers in directions opposite to each other when in engagement therewith and to thereby tension the photosensitive element extending between the rollers
  • drive means engageable with and disengageable from the coupling means engageable with the take-up shaft to selectively engage with the take-up roller, the drive means being operable to drive the take-up shaft and the take-up roller in sequence when in engagement with the coupling means and to thereby wind up the photosensitive element and pull out the same from the stock roller, and
  • the coupling means comprises two coupling rods stepped to provide splined portions engageable in splined holes formed in the ends of the stock shaft and the take-up shaft respectively and to provide splined portions of a greater diameter engageable in splined holes of a greater diameter formed in the ends of the stock roller and the take-up roller respectively, the coupling rods being shiftable in axial directions opposite to each other under the control of the operation means to selectively engage the greater diameter splined portions in the greater diameter splined holes, the coupling rods being rotatable by the drive means when required.
  • the tension means comprises an assembly of two gears biased to rotate in directions opposite to each other and two tubular shafts in engagement with the stock roller and the take-up roller and having gears meshable with the gears respectively when the assembly is shifted, and the stock roller and the take-up roller are biased in di rections opposite to each other when the gears mesh with each other respectively.
  • the drive means includes a cam for defining the length of the photosensitive element to be wound up and the length of the same to be pulled out during the image transfer element winding-up and pullingout operations to stop the drive means upon completion of the winding-up and pulling-up operations.
  • the means for moving the tension and coupling means comprises a cylinder cam formed with two cam grooves in its peripheral surface and rotatable through for each cycle of the winding-up, pulling-out and tensioning operations, said means for moving the tension means into engagement with and out of disengagement from the stock roller and the take-up roller is under the control of the first cam groove, and the means for moving the coupling means into engagement with the stock roller and the take-up roller is selectively under the control of the second cam groove.
  • An image transfer web cassette for an electrostatic copying machine comprising a body member, a pair of transversely spaced parallel take-up and feed shafts independently, rotatably supported by said body memher, a pair of transversely spaced take-up and feed reels coaxial with respective shafts and supported for independent rotation relative to each other and said shafts, each of said reels having a longitudinal opening providing access to the respective shafts, a separable drive coupling connected to each of said reels and shafts, and
  • each of said reels comprises a hollow drum having a longitudinal slot defining a respective access opening.
  • the cassette of claim 7, including a guide roller transversely spaced from and parallel to said reels. said web extending from one reel along a predetermined path about said guide roller and to the other reel.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Photographic Developing Apparatuses (AREA)
  • Paper Feeding For Electrophotography (AREA)
US345381A 1972-04-13 1973-03-27 Apparatus for operating cassette of photosensitive element in electrophotographic copier Expired - Lifetime US3861613A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47037535A JPS48104551A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-04-13 1972-04-13

Publications (1)

Publication Number Publication Date
US3861613A true US3861613A (en) 1975-01-21

Family

ID=12500204

Family Applications (1)

Application Number Title Priority Date Filing Date
US345381A Expired - Lifetime US3861613A (en) 1972-04-13 1973-03-27 Apparatus for operating cassette of photosensitive element in electrophotographic copier

Country Status (3)

Country Link
US (1) US3861613A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS48104551A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2318464A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3984241A (en) * 1974-03-07 1976-10-05 Pitney-Bowes, Inc. Photocopying process in which photoconductor belt is incrementally replaced
FR2345748A1 (fr) * 1976-03-25 1977-10-21 Pitney Bowes Inc Machine de reprographie
EP0300386A3 (en) * 1987-07-22 1989-03-08 Dainippon Screen Mfg. Co., Ltd. Synchronous driving apparatus for a scanning exposure type reproducing apparatus
US4970551A (en) * 1988-09-16 1990-11-13 International Business Machines Corporation Cartridge containing a reciprocating photoconductor ribbon for serial electrophotographic printing
US20050105141A1 (en) * 2003-11-17 2005-05-19 Chih-Chieh Wu Scanning device have adjustable image amplification of lens

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59192280A (ja) * 1983-04-15 1984-10-31 Ricoh Co Ltd 複写装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2517055A (en) * 1946-04-06 1950-08-01 Oral A Thompson Reeling apparatus
US3223008A (en) * 1962-11-30 1965-12-14 Harris Intertype Corp Electrophotographic apparatus
US3619050A (en) * 1969-06-19 1971-11-09 Eastman Kodak Co Web-handling apparatus and cartridge and web usable therewith
US3672761A (en) * 1968-09-26 1972-06-27 Lumoprint Zindler Kg Copying apparatus
US3737230A (en) * 1970-12-07 1973-06-05 Oce Van Der Grinten Nv Web transport systems for copying machines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2517055A (en) * 1946-04-06 1950-08-01 Oral A Thompson Reeling apparatus
US3223008A (en) * 1962-11-30 1965-12-14 Harris Intertype Corp Electrophotographic apparatus
US3672761A (en) * 1968-09-26 1972-06-27 Lumoprint Zindler Kg Copying apparatus
US3619050A (en) * 1969-06-19 1971-11-09 Eastman Kodak Co Web-handling apparatus and cartridge and web usable therewith
US3737230A (en) * 1970-12-07 1973-06-05 Oce Van Der Grinten Nv Web transport systems for copying machines

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3984241A (en) * 1974-03-07 1976-10-05 Pitney-Bowes, Inc. Photocopying process in which photoconductor belt is incrementally replaced
FR2345748A1 (fr) * 1976-03-25 1977-10-21 Pitney Bowes Inc Machine de reprographie
EP0300386A3 (en) * 1987-07-22 1989-03-08 Dainippon Screen Mfg. Co., Ltd. Synchronous driving apparatus for a scanning exposure type reproducing apparatus
US5030993A (en) * 1987-07-22 1991-07-09 Dainippon Screen Mfg. Co., Ltd. Synchronous driving apparatus for a scanning exposure type reproducing apparatus
US4970551A (en) * 1988-09-16 1990-11-13 International Business Machines Corporation Cartridge containing a reciprocating photoconductor ribbon for serial electrophotographic printing
EP0359571A3 (en) * 1988-09-16 1991-09-25 Lexmark International, Inc. Electrophotographic printing apparatus
US20050105141A1 (en) * 2003-11-17 2005-05-19 Chih-Chieh Wu Scanning device have adjustable image amplification of lens

Also Published As

Publication number Publication date
JPS48104551A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-12-27
DE2318464A1 (de) 1973-10-31

Similar Documents

Publication Publication Date Title
US3588242A (en) Drum structure for a xerographic copying machine
US3480361A (en) Photographic copying machine
US3619050A (en) Web-handling apparatus and cartridge and web usable therewith
US4008954A (en) Device for extinguishing unnecessary electrostatic charge in electrophotographic copier
US3867026A (en) Electrophotographic copier of transfer type
US3873196A (en) Electrophotographic copier of transfer type
US3861613A (en) Apparatus for operating cassette of photosensitive element in electrophotographic copier
US3049968A (en) Xerographic reproduction apparatus
US3843252A (en) Electrophotographic copier of image transfer type
US3807854A (en) Drive mechanism for photsensitive web in an image transfer type electrophotographic copier
US4076183A (en) Photoconductor incrementing apparatus
JPS6186777A (ja) マイクロフイルム・リ−ダ・プリント装置
US3539257A (en) Document photographing machine
US4248523A (en) Electrophotographic copying apparatus equipped with improved copy paper cutting arrangement
US4192603A (en) Replenishable photoconductor system
US3544206A (en) Film-feeding mechanism for cartridge-loaded motion picture apparatus
US4219273A (en) Optical apparatus for electrophotographic copying machine
US3905247A (en) Clutches
JP2001117467A (ja) プロセスカートリッジ、画像形成装置および組立て体
US3868181A (en) Apparatus for driving photosensitive element in electrophotographic copier of image transfer type
CA1252325A (en) Multiple magnification mode copying apparatus
JPS6236231B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JPS644178B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JPS64702B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JPS59162579A (ja) 電子写真製版機