US3847306A - Developing apparatus - Google Patents

Developing apparatus Download PDF

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Publication number
US3847306A
US3847306A US00039686A US3968670A US3847306A US 3847306 A US3847306 A US 3847306A US 00039686 A US00039686 A US 00039686A US 3968670 A US3968670 A US 3968670A US 3847306 A US3847306 A US 3847306A
Authority
US
United States
Prior art keywords
flexing
donor
rotation
developing
donor member
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
US00039686A
Other languages
English (en)
Inventor
R Howell
S Hotchkiss
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.)
Xerox Corp
Original Assignee
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Priority to US00039686A priority Critical patent/US3847306A/en
Priority to CA102,357A priority patent/CA949819A/en
Priority to GB1532671*[A priority patent/GB1353651A/en
Priority to DE2125079A priority patent/DE2125079C3/de
Priority to CA199,932A priority patent/CA966998A/en
Application granted granted Critical
Publication of US3847306A publication Critical patent/US3847306A/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
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0805—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a brush
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S222/00—Dispensing
    • Y10S222/01—Xerography

Definitions

  • ABSTRACT A developing assembly wherein a developing applicator receives electroscopic marking particles from a donor member supported in a sump housing, such housing having a resilient side wall which is flexed to reduce or prevent excessive accumulation of marking particles as a result of the donor members rotation.
  • This invention relates generally to donor assemblies for and method of making marking particles available to a'developing applicator in an apparatus wherein a latent image, either electrostatic or magnetic, is to be developed with such particles.
  • a rotating cylindrical natural fur brush has'sometimes been used to convey marking particles referred to commonly as toner, into transfer relation with the latent image to be developed.
  • toner has been sprinkled or blown onto the brush as well as brought into contact with the brush via a donor assembly in the form of a solid cylindrical roller which rotates in a sump of developer, i.e.' toner and carrier bead mixture.
  • This toner is confined by two end plates 6 and a bottom member or panel 8 and a side wall 10.
  • the side wall 10 is comprised of two planar sections, oneof which is designated by reference numeral 11.
  • the other portion includes a rectangular frame 16 which is suitably attached to flanges of portion 11 and bottom plate 8. In its attached position, frame 16 holds in place a flexiblemember or diaphragm 14 across the opening in the sump housing between the aforemen- .tioned flanges and end plates 6. This flexible member date the donor roller 12 as it rotates within the housing.
  • the housing for the donor assembly has a flexible wall or portion thereof which is flexed in a periodic manner to push compacted using agitators were helpful in solving the problem but or accumulated toner away from the wall and into renewed contact with the donor roller.
  • FIGURE illustrates a perspective view of a donor housing with parts broken away for simplicity to show the interior thereof.
  • FIGURE shows clearly only one end of the housing. The end not shown, however, is substantially identical to the one illustrated.
  • the FIGURE illustrates a donor assembly housing
  • This donor roller also assists inkeeping the developer material or toner within the other portion of the donor housing.
  • the portion of the donor roller 12 which is exposed to the outside of the donor housing is adapted to be contacted by rotating fibrous applicator 15, for example, shown in broken lines during the developing cycle.
  • the donor roller may be'tubu'lar or solid and may be coated with an appropriate insulating material to aid in attracting in conveying toner to the developing appli-v cator.
  • the donor roller may be driven to rotationby motive power applied to an input shaft 18 which corresponds to the axis of the donor roller 1-2 and is coupled thereto.
  • an actuating cam 20 which along that portion co-extensive with the elongated dimension of thedonor housing is an agitator bar 28 which is fixed to this U-shapedmember.
  • the donor roller In the normal mode of operation the donor roller is I either moved continuously or moved in a periodic manner which results in the periodic and regular flexing of the diaphragm 14. This regular flexing maintains the sump of electrostatic marking particles in proper relationship with the donor roller for good donation to a developing applicator. While specific details and configuration of the donor housing of the present invention has been described, it is not limited to, it is not limited to, it is not limited to, it is flexing of the diaphragm 14. This regular flexing maintains the sump of electrostatic marking particles in proper relationship with the donor roller for good donation to a developing applicator. While specific details and configuration of the donor housing of the present invention has been described, it
  • the precise configuration of the donor housing may be altered without parting'from the principles of the present invention.
  • the side wall 10 instead of being made up of two non-coplanar members may lay within a single plane.
  • agitator bar 28 it will be recognized that other shapes and configurations may be employed with substantially the same result. It is only necessary to use a member which does not rupture the flexible diaphragm wall 14.
  • agitator bar 28 has been disclosed as being only in contact with the flexible diaphragm 14 it will be readily realized that it may be molded into the diaphragm 14 or in some manner fixed thereto so as to positively act on this member during its complete motion.
  • the oscillating member 22 and associated bar 28 are described as being actuated by the donor rollers movement, it may be readily appreciated that the flexing of diaphragm 14 may be accomplished in other ways either as a function of the rotation of the donor roller or not.
  • a solid cylindrical donor roller has been used to aid the detailed description of the present invention, it should be apparent that donor members of other configurations are equally suited for use in the present invention. For example, natural fur or synthetic fibrous brushes maybe used.
  • a developing assembly comprising:
  • a developing applicator capable of rotation about a first axis
  • a donor member having an input shaft responsive to motive power to rotate said donor member about a second axis substantially parallel to said first axis
  • a sump housing adapted to contain a quantity of marking particles mounted about said donor mem-. ber, said sump housing having 1. an openingtherein to permit contact between said developing applicator and said donor member
  • a donor assembly comprising: spaced apart end plates, a bottom panel extending between said end plates and attached thereto,
  • a donor member rotatably supported at least partially within said volume for contacting marking particles contained therein
  • said responsive means comprises a cam and follower arrangement operatively associating said donor member with said flexing means.
  • a developing assembly comprising:
  • a sump housing for containing a quantity of marking particles
  • a donor member rotatably supported in said sump housing for transporting marking particles from said sump housing to said developer applicator

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dry Development In Electrophotography (AREA)
US00039686A 1970-05-20 1970-05-20 Developing apparatus Expired - Lifetime US3847306A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US00039686A US3847306A (en) 1970-05-20 1970-05-20 Developing apparatus
CA102,357A CA949819A (en) 1970-05-20 1971-01-11 Developing apparatus
GB1532671*[A GB1353651A (en) 1970-05-20 1971-05-17 Developing apparatus
DE2125079A DE2125079C3 (de) 1970-05-20 1971-05-19 Beschickungsvorrichtung zum Aufbringen eines Entwicklerstoffs auf eine Entwicklungsvorrichtung
CA199,932A CA966998A (en) 1970-05-20 1974-05-15 Developing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00039686A US3847306A (en) 1970-05-20 1970-05-20 Developing apparatus

Publications (1)

Publication Number Publication Date
US3847306A true US3847306A (en) 1974-11-12

Family

ID=21906837

Family Applications (1)

Application Number Title Priority Date Filing Date
US00039686A Expired - Lifetime US3847306A (en) 1970-05-20 1970-05-20 Developing apparatus

Country Status (4)

Country Link
US (1) US3847306A (de)
CA (1) CA949819A (de)
DE (1) DE2125079C3 (de)
GB (1) GB1353651A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4000833A (en) * 1975-03-06 1977-01-04 Itek Corporation Toner dispensing apparatus
US4076149A (en) * 1976-02-18 1978-02-28 Xerox Corporation Slave drive for toner dispenser with striker

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1644175A (en) * 1924-01-11 1927-10-04 Jackson & Church Co Wall-vibrating machine
US3125465A (en) * 1964-03-17 Sheet duster
US3399652A (en) * 1967-06-14 1968-09-03 Addressograph Multigraph Automatic toner concentrate detector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125465A (en) * 1964-03-17 Sheet duster
US1644175A (en) * 1924-01-11 1927-10-04 Jackson & Church Co Wall-vibrating machine
US3399652A (en) * 1967-06-14 1968-09-03 Addressograph Multigraph Automatic toner concentrate detector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4000833A (en) * 1975-03-06 1977-01-04 Itek Corporation Toner dispensing apparatus
US4076149A (en) * 1976-02-18 1978-02-28 Xerox Corporation Slave drive for toner dispenser with striker

Also Published As

Publication number Publication date
DE2125079B2 (de) 1978-04-20
GB1353651A (en) 1974-05-22
CA949819A (en) 1974-06-25
DE2125079C3 (de) 1978-12-14
DE2125079A1 (de) 1971-12-02

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