US3768702A - Toner supply means for electrostatic reproducing machine - Google Patents

Toner supply means for electrostatic reproducing machine Download PDF

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Publication number
US3768702A
US3768702A US00250153A US3768702DA US3768702A US 3768702 A US3768702 A US 3768702A US 00250153 A US00250153 A US 00250153A US 3768702D A US3768702D A US 3768702DA US 3768702 A US3768702 A US 3768702A
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US
United States
Prior art keywords
container
toner
hammering member
biasing
pivoting
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
US00250153A
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English (en)
Inventor
S Fujimoto
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Application granted granted Critical
Publication of US3768702A publication Critical patent/US3768702A/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
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0877—Arrangements for metering and dispensing developer from a developer cartridge into the development unit
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0865—Arrangements for supplying new developer
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0865—Arrangements for supplying new developer
    • G03G15/0867—Arrangements for supplying new developer cylindrical developer cartridges, e.g. toner bottles for the developer replenishing opening
    • G03G15/0868—Toner cartridges fulfilling a continuous function within the electrographic apparatus during the use of the supplied developer material, e.g. toner discharge on demand, storing residual toner, acting as an active closure for the developer replenishing opening
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/06—Developing structures, details
    • G03G2215/066—Toner cartridge or other attachable and detachable container for supplying developer material to replace the used material
    • G03G2215/068—Toner cartridge or other attachable and detachable container for supplying developer material to replace the used material having a box like shape
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/06—Developing structures, details
    • G03G2215/066—Toner cartridge or other attachable and detachable container for supplying developer material to replace the used material
    • G03G2215/0685—Toner cartridge or other attachable and detachable container for supplying developer material to replace the used material fulfilling a continuous function within the electrographic apparatus during the use of the supplied developer material, e.g. toner discharge on demand, storing residual toner, not acting as a passive closure for the developer replenishing opening

Definitions

  • the present invention relates to a toner supply means for an electrostatic reproducing machine.
  • Dry type developer consists of so-called toner particles and proper carrier particles.
  • the toner particles are prepared by uniformly dispersing a pigment such as carbon black, and a dispersoid and the like into a low melting point thermoplastic resin and pulverising the particles to the order of 1 to microns.
  • the proper carrier is iron particles in the case of the magnetic brush method, glass beads in the case of the cascade developing method and fur brush in the case of the fur brush developing method.
  • Such developer particles are usually supplied upon the electrostatic latent image of a photosensitive member repeatedly and adhered to the latent image to form particle images. Therefore, the density of toner particles is gradually decreased and so a means for supplying toner particles becomes necessary.
  • a slit type opening was provided at the bottom of a toner housing hopper, and a rotatable roller provided at the opening portion in order to prevent the dropping of toner said roller being properly rotated, when necessary, to discharge toner to the outside of the hopper.
  • toner When the toners in the hopper are decreased, toner must be supplied to the hopper through the hand of an operator. In that case, toner consisting of small particles is often splashed thereabouts to spoil the surroundings. So, its handling must be effected carefully and it is very troublesome. As the particle size of the toner is in the order of l to 10 microns, toner particles are liable to coagulate or they are unremovably deposited upon the roller 13 to black the toner discharge mouth. As a result, the coagulated particles become hard to drop into the developer tank.
  • a major object of the present invention is to provide a means for supplying toner to a developer tank by giving an impulsive change to the air pressure in a disposable container which is generated by striking a side surface of the container with a hammering member, said container is usually provided with a discharge mouth consisting of a plurality of small holes and in the case of using said container, it is mounted to a developer tank with its discharge mouth opened.
  • FIG. 1 denotes a perspective view of a toner supply means illustrating an embodiment of the present invention.
  • FIG. 2 denotes a side view illustrating the working condition of the means shown in FIG. 1.
  • FIG. 3 denotes a cross sectional view of a toner supply means illustrating another embodiment of the present invention.
  • a dishcharge mouth 3 consisting shaft are a plurality of members holes. Both ends of the container are removably mounted to a holder 4.
  • Each side surface 2a of the container 2 is made of an elastic member such as a sheet of paper, plastics or a thin metal plate so that when when an side surface is struck by a hammer, the side surface is deformed to a certain degree and recovers its original state when the hammer has left the surface.
  • a working cam 6 On a shaft 5 to which a holder 4 is fixedly mounted, there are mounted a working cam 6 provided with a notched protion 6a and a gear 7. Against the peripheral surface 6b of the working cam 6, a bent piece 8a which is provided at the free end of a follower lever 8 is pressed. This pressing force is given by an elastic spring 9, one end of which is mounted to the follower lever 8 and the other end is mounted to a fixed member not' shown in the drawings.
  • a start switch is operated for a drive means in order to rotate the working cam 6 and the container 2 in the direction of arrow 13 for a proper period. While the free end 8a of the follower lever 8 is pressed against the peripheral surface 6b of the working cam 6 as seen in FIG. 1, the free end 12a of the hammering member 12 is in a condition separated from the adjacent side surface and edge of the container 2 as seen in FIG. 2.
  • the container 2 is struck by the hammering member 12 to discharge toner to the outside of the container whenever the discharge mouth 3 comes below the shaft 5.
  • the drive means for rotating the working cam 6 may be controlled properly by an operator by examining the densily of an image upon a copy sheet or the start and stop of the drive means may be controlled by sensing the descrease of toner density in the developer by a density detector.
  • FIG. 3 is a side sectional view of a toner supply means which shows another embodiment of the present invention, wherein a photosensitive drum 23 consisting of a photosensitive plate 22 made of a thin layer of an amorphous selenium overcoated on the surface of a metal base 21 (for example, an aluminum plate) is mounted so as to rotate in the direction of an arrow 24.
  • a photosensitive drum 23 consisting of a photosensitive plate 22 made of a thin layer of an amorphous selenium overcoated on the surface of a metal base 21 (for example, an aluminum plate) is mounted so as to rotate in the direction of an arrow 24.
  • mising rollers 28, 29 having mixing plates 27 for mixing the developer 20 from container 47 in the interior of a developer tank and the tank is further provided with a cylindrical body ruler 32 which supplies the developer for development at opening portion 31 of the developer tank 25.
  • These rollers are connected by a chain not shown in the drawings so as to rotate in the counter clockwise direction.
  • the peripheral surface of the cylindrical body 32 is close to the photosensitive plate 22 as shown in the drawing, and in the interior of the cylindrical body roller 32, there are positioned magnets 33 and 34. Both end portions of shaft 35 which is fixed to the bottom of both magnets are fixed to both side plates of the developer tank 25.
  • a working cam 37 for supplying toner to the interior of the developer tank 25 is fixed to a shaft 38, with both end portions journaled to side plates 39 of the developer tank 25 so as to rotate in the direction of an arrow 41.
  • a roller 42 is pressed against the peripheral surface of the working cam 37 and the shaft of the roller 42 is set in one of the comb shaped channels provided at the free end of a follower lever 43.
  • a shaft 44 to which the follower lever 43 is fixed is journalled to side plates 39 and a hammering member 45 is fixed to this shaft 44.
  • a roller 46 provided at the free end of the hammering member 45 contacts a side plate 47a of the container 47.
  • the container 47 is set in a compartment made of a slant plate 48 and a Wall plate 49, with its upper surface is pressed by a fixed plate 53 which is mounted upon an upper plate 52 of compartment 25 by a fixed screw 51.
  • a notch 48a is provided at a portion of the slant plate 48 to expose a portion of side plate 470 of the container 47 and a toner supply mouth 49a is provided at the bottom of wall plate 49.
  • the follower member 43 is given a rotational bias in the clockwise direction around the shaft 44 by the clasticity of an elastic spring 55 which is engaged at one end with side plate 39 and at another end with a follower member 43.
  • the working cam 37 may be rotated in the direction of arrow 41 by giving a working order to a drive means not shown in the drawings.
  • the roller 42 will be raised gradually, the follower member 43 rotates in the counter clockwise direction and charges the spring 55.
  • the roller 46 of the hammering member 45 is in a position which is considerably remote from the side plate 47a of the container 47. Then the follower member 43 and the hammering member 45 are rotated rapidly in the clockwise direction by the spring 55 upon the roller 42 dropping into the notched portion, so that the roller 47a of the hammering member strikes the side plate 47a of the container 47.
  • the toner 45 in the container 47 is discharged through the discharge mouth not shown in the drawings into the developer tank 25 as in the case of the embodiment shown in FIG. 1.
  • This hammering action is effected once whenever the working cam 37 rotates one revolution and discharges the toner to the outside of the container.
  • the toner 54 in the container 47 is exhausted, the emptied container 47 is taken out and a new container filled with toner is replaced.
  • the roller 42 may be set in a channel at the upper portion. Now, supposing that the roller 42 is moved from the position shown in the drawing to the upper channel 43a of the follower member, then the roller 42 will be set in the direction of leaving from the peripheral surface of the working cam. Therefore, when the working cam 37 rotates in the direction of arrow 41 and the roller 42 comes close to the notched portion, the distance between the roller 46 of the hammering member 45 and the side plate 47a becomes small. As a consequence, the charged quantity of the spring becomes small, and the hammering force of the hammering member is decreased.
  • the amount of the discharged toner is also decreased.
  • the container 47 is fixed as shown in FIG. 3, the toner in the vicinity of the discharge mouth is easily discharged to the outside of the container, while the toner remote from the discharge mouth is liable to be coagulated since the toner consists of small particles. Therefore, a cavity is often formed in the vicinity of the discharge mouth. After a portion of air is discharged from the discharge mouth by striking a side plate of the container, air flows into the container through the discharge mouth. Therefore, the occurence of the above mentioned coagulation of toner is prevented.
  • toner is housed in a disposable container which is removably mounted in the vicinity of a developer tank and the toner is supplied to the developer from a discharge mouth of the container by striking the side surface of the container, if necessary.
  • the supply of toner to a reproducing machine may be effected simply and swiftly, the toner contamination of the surroundings of a r di a a i qii lprqfi tst What is claimed isf l.
  • Toner supply means for supplying toner to the developer tank of an electrostatic reproducing machine comprising:
  • a removable container containing toner and having a discharge mouth defined by a plurality of small discharge holes for discharging toner
  • a pivotable hammering member positioned adjacent a side surface of the container
  • control means for pivoting said hammering member agsinst the action of said biasing means and releasing it to permit the hammering member to be pivoted by said biasing means to strike said surface of the container discharging toner therefrom;
  • rotatable cam means having a surface which pivots said follower means against the action of said biasing means and with a notched portion permitting the follower means to be pivoted by said biasing means causing said hammering member to strike said container;
  • a rotatable shaft having said container and said cam means mounted thereon for rotation therewith.
  • Toner supply means for supplying toner to the developer tank of an electrostatic reproducing machine comprising:
  • a removable container containing toner and having a discharge mouth defined by a plurality of small discharge holes for discharging toner
  • a pivotable hammering member positioned adjacent a side surface of the container
  • control means for pivoting said hammering member against the action of said biasing means and releasing it to permit the hammering member to be pivoted by said biasing means to strike said surface of the container discharging toner therefrom;
  • rotatable cam means having a surface which pivots said follower means against the action of said biasing means and with a notched portion permitting the follower means to be pivoted by said biasing means causing said hammering member to strike said container;
  • a pivotable shaft having said hammering member and said follower means mounted thereon for pivoting therewith.
  • Toner supply means for supplying toner to the developer tank of an electrostatic reproducing machine comprising:
  • a removable container containing toner and having a discharge mouth defined by a plurality of small discharge holes for discharging toner
  • control means for pivoting said hammering member against the action of said biasing means and releasing it to permit the hammering member to be pivoted by said biasing means to strike said surface of the container discharging toner therefrom;
  • e. follower means connected to said hammering member for pivoting therewith and adjustable in position with respect to said hammering member to vary the striking force of said hammering member against said side surface of the container;
  • rotatable cam means having a surface which pivots said follower means agsinst the action of said biasing means and with a notched portion permitting the follower means to be pivoted by said biasing means causing said hammering member to strike said container.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dry Development In Electrophotography (AREA)
US00250153A 1971-05-10 1972-05-04 Toner supply means for electrostatic reproducing machine Expired - Lifetime US3768702A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3102671A JPS5627873B1 (en)) 1971-05-10 1971-05-10

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US3768702A true US3768702A (en) 1973-10-30

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US00250153A Expired - Lifetime US3768702A (en) 1971-05-10 1972-05-04 Toner supply means for electrostatic reproducing machine

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US (1) US3768702A (en))
JP (1) JPS5627873B1 (en))
DE (1) DE2222307A1 (en))
GB (1) GB1360124A (en))

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69604334D1 (de) * 1995-06-07 1999-10-28 Nashua Corp Vorrichtung und Verfahren, um Toner und desgleichen auszuteilen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3448724A (en) * 1968-01-11 1969-06-10 Xerox Corp Developing apparatus
US3596807A (en) * 1969-02-06 1971-08-03 Xerox Corp Dispensing apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3448724A (en) * 1968-01-11 1969-06-10 Xerox Corp Developing apparatus
US3596807A (en) * 1969-02-06 1971-08-03 Xerox Corp Dispensing apparatus

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Publication number Publication date
JPS5627873B1 (en)) 1981-06-27
GB1360124A (en) 1974-07-17
DE2222307A1 (de) 1972-11-16

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