EP0430098B1 - Zuführrolle zum Mischen eines Pulvers - Google Patents

Zuführrolle zum Mischen eines Pulvers Download PDF

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Publication number
EP0430098B1
EP0430098B1 EP90122401A EP90122401A EP0430098B1 EP 0430098 B1 EP0430098 B1 EP 0430098B1 EP 90122401 A EP90122401 A EP 90122401A EP 90122401 A EP90122401 A EP 90122401A EP 0430098 B1 EP0430098 B1 EP 0430098B1
Authority
EP
European Patent Office
Prior art keywords
mixing
feed roller
powder
roller
feed
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
EP90122401A
Other languages
English (en)
French (fr)
Other versions
EP0430098A2 (de
EP0430098A3 (en
Inventor
Hideki Ishida
Hiroshi Kusumoto
Naruyuki Miyamoto
Yoshifumi Ishii
Shoichi Kitagawa
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.)
Kyocera Mita Industrial Co Ltd
Original Assignee
Mita Industrial 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
Priority claimed from JP1310955A external-priority patent/JP2808536B2/ja
Priority claimed from JP1310960A external-priority patent/JPH03170970A/ja
Priority claimed from JP1310961A external-priority patent/JPH07111595B2/ja
Application filed by Mita Industrial Co Ltd filed Critical Mita Industrial Co Ltd
Publication of EP0430098A2 publication Critical patent/EP0430098A2/de
Publication of EP0430098A3 publication Critical patent/EP0430098A3/en
Application granted granted Critical
Publication of EP0430098B1 publication Critical patent/EP0430098B1/de
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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers

Definitions

  • the invention relates to a feed roller for mixing a powder such as a developer in an image-forming apparatus according to the preamble portion of claim 1.
  • the spiral-shaped rollers as shown in the items a, b and e have had a problem that they have a small capability to feed a developer to a developing roller
  • the roller having an auxiliary lateral-feed mechanism as shown in the item d or the one having a mixing wing parallel to a rotating shaft thereof as shown in the item c have a problem that they have a poor lateral mixing performance
  • the one of spiral-shape as shown in the item f has a problem that they scrapes up a developer diagonally to a developing roller.
  • a roller having a shaft and lateral-feed blades mounted on the shaft is available.
  • the lateral-feed blades are designed to laterally feed a developer and mix the developer so as to keep proper fluidization balance of the developer.
  • a roller is known in which the screw pitch of lateral-feed blades S is made large on the start side in the screw-conveyance direction and small on the end side (see Fig. 7).
  • the object of the invention is to realize a feed roller for mixing a powder such as a developer in an image forming apparatus which feeds a sufficient quantity of developer to a developing roller, improves lateral-mixing performance and has an excellent lateral-feed performance.
  • a first mixing wing is provided parallel to a rotating shaft and a second spiral-shaped mixing wing is provided diagonally to the shaft, crossing each other.
  • a spiral-shaped groove for feeding a powder is formed with respect to the rotating direction of the second mixing wing.
  • the invention is arranged in such a manner as described above, so that the first mixing wing feeds vertically a powder to the next process while mixing the powder in the rotating direction, and the second mixing wing laterally feeds the powder while mixing the powder in the lateral direction.
  • the groove for feeding the powder causes the sliding of the powder on the second mixing wing to become better, thereby allowing the lateral-feed capability to be improved.
  • Figs. 1 through 7 are views of prior art feed rollers.
  • Fig. 8 is a schematic sectional view of an image-forming apparatus using a feed roller according to the present invention.
  • Fig. 9 is a sectional view of a developing device of the image-forming apparatus.
  • Fig. 10 (a) is a side view of one embodiment of a feed roller according to the present invention.
  • Fig. 10 (b) is a front view of the embodiment.
  • Fig. 11 is a front view of the feed roller shown in Fig. 10 (b) when rotated about 45 degrees.
  • Fig. 8 is a schematic sectional view showing an image-forming apparatus using a feed roller according to the present invention.
  • a manuscript placing plate 2 for placing a manuscript, a manuscript cover 1, and an optical system 200 including a lamp 3 and reflection mirrors 4 are provided on the upper part of the apparatus.
  • the optical system 200 moves in such a manner as to scan a manuscript along the manuscript placing plate 2.
  • a main electrifier 6 for electrifying the image carrier 5 On the periphery of an image carrier 5, a main electrifier 6 for electrifying the image carrier 5, a developing device 7 for toner-developing a latent image on the image carrier 5 formed by being exposed to the image light entered from the optical system 200, a transfer device 9 for transferring the toner-image-developer to a sheet 8, a separator 10 for separating the sheet 8 from the image carrier 5, a cleaner 11 for cleaning a toner remaining after the transferring, and the like are arranged.
  • a conveyance path 14 for conveying the sheet 8 from a sheet feed cassette 12 for feeding the sheet 8 or from a hand insertion tray 13 is provided on the upstream side of the transfer device 9. Also, on the conveyance path 14, a sheet feed roller 15, a conveyance roller 16, a resist roller 17 and the like are arranged, and a sheet guide plate 18 is provided directly upstream the transfer device 9.
  • a conveyance belt 19 On the downstream side of the separator 10, a conveyance belt 19 is provided, which conveys the separated sheet 8 to a thermal fixer 20.
  • the thermal fixer 20 melts and fixes a toner image on the sheet 8.
  • the toner-fixed sheet 8 is discharged onto a discharge tray 21.
  • a toner supply roller 30 for supplying a toner is provided on the diagonally upper side within the developing device 7.
  • a mixing roller 32 for mixing a developer X returned from a pass partition plate 31 with the toner from the toner supply roller 30 is provided;
  • a feed roller 33 for feeding the developer X mixed by the mixing roller 32 to a developing roller 34 is provided on the image carrier 5 side; and the developing roller 34 is provided close to the image carrier 5.
  • a toner sensor 35 is arranged, and an ear cut plate stay 36 and a developing-slit plate 37 are provided.
  • a developing housing 38 covers the developing device 7.
  • the operation in the developing device 7 is described hereinafter.
  • the developer X is mixed by the mixing roller 32 and fed to the feed roller 33.
  • the feed roller 33 feeds a new developer X mixed to the developing roller 34.
  • the developer X having not ridden on the developing roller 34 by the ear cutting of the ear cut plate stay 36 is fed onto the pass partition plate 31.
  • the developer X having passed through the pass partition plate 31 is returned to the mixing roller 32.
  • Fig. 10 (a) is a side view of the feed roller 33
  • Fig. 10 (b) is a front view of the roller
  • Fig. 11 is a front view of Fig. 10 (b) when rotated about 45 degrees.
  • a first mixing wing 40 is provided parallel to a rotating shaft 43, and the three-step first mixing wings 40, 40 and 40 are seen in both Fig. 10 (b) and Fig. 11.
  • a second mixing wing 41 is diagonally provided and of spiral-shape. The first mixing wing 40 and the second mixing 41 are formed crossing each other in the lateral direction (axially).
  • a spiral-shape groove 42 for moving a developer is formed on the one side located on the forward section with respect to rotating direction (on the powder scraping-up side) of the both sides of the second mixing wing 41, along the second mixing wing 41.
  • the first mixing wing 40 can feed vertically a developer to the developing roller 34.
  • the second mixing wing 41 though of course mixes the developer and feeds it in lateral direction, is provided with the groove 42 for feeding the developer, so that the sliding of the developer on the second mixing wing 41 becomes better, thereby causing the developer lateral-feed capability to be improved (see arrow A).
  • the adjustment of the clearance of the groove 42 for feeding a developer allows the lateral-feed of lateral mixing to be adjusted. Further, even after the completion of a mold, a little adjustment can be performed.
  • the apparatus performance is less affected by developer toner concentration difference and environmental conditions (such as humidity and apparatus installing condition).
  • the feed roller in the present invention includes the mixing roller in addition to the feed roller in a narrow sense.
  • the feed roller according to the present invention can be used for apparatuses for mixing a powder besides image-forming apparatuses.
  • the present invention is such that the first mixing wing provided parallel to the rotating shaft and the second spiral-shape mixing wing provided diagonally to the shaft are formed crossing each other, and the spiral-shape groove for feeding a powder is formed on the one side located on the forward section with respect to rotating direction of the both sides of the second mixing wing, along the second mixing wing, so that the groove for feeding a powder causes the sliding of the powder on the second mixing wing to become better, thereby allowing lateral-mixing performance and lateral-feed performance to be improved. Further, the first mixing wing can feed a sufficient quantity of powder to the roller of the next process.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dry Development In Electrophotography (AREA)

Claims (6)

  1. Zuführrolle zum Mischen eines Pulvers, beispielsweise eines Entwicklers, in einer Bilderzeugungsvorrichtung, mit
    - einem ersten Mischflügel (40), der parallel zu einer umlaufenden Welle (43) angeordnet ist, und
    - einem zweiten, diagonal zu der Welle angeordneten spiralförmigen Mischflügel (41),
    - wobei die beiden Flügel (40, 41) einander kreuzen,
    dadurch gekennzeichnet,
    daß zwischen dem ersten Mischflügel (40) und dem zweiten Mischflügel (41), entlang der Vorderseite des zweiten Mischflügels (41) in bezug auf die Umlaufrichtung der Welle (43), eine spiralförmige Nut (42) für die Zufuhr des Pulvers ausgebildet ist.
  2. Zuführrolle nach Anspruch 1,
    dadurch gekennzeichnet, daß der erste Mischflügel (40) für eine vertikale Zufuhr des Pulvers ausgebildet ist.
  3. Zuführrolle nach Anspruch 1 oder 2,
    dadurch gekennzeichnet, daß der zweite Mischflügel (41) zum Mischen und zur lateralen Zufuhr des Pulvers ausgebildet ist.
  4. Zuführrolle nach den Ansprüchen 1 bis 3,
    dadurch gekennzeichnet, daß die Nut (42) an dem zweiten Mischflügel (41) für ein verbessertes Gleiten des Pulvers vorgesehen ist, und um die laterale Zufuhr zu verbessern.
  5. Zuführrolle nach den Ansprüchen 1 bis 4,
    dadurch gekennzeichnet, daß die Nut (42) ein einstellbares Spiel aufweist.
  6. Zuführrolle nach den Ansprüchen 1 bis 5,
    dadurch gekennzeichnet, daß die Zuführrolle aus kleinen Blockeinheiten besteht, die, kombiniert, die Zuführrolle (33) bilden.
EP90122401A 1989-11-29 1990-11-23 Zuführrolle zum Mischen eines Pulvers Expired - Lifetime EP0430098B1 (de)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP1310955A JP2808536B2 (ja) 1989-11-29 1989-11-29 供給ローラ
JP1310960A JPH03170970A (ja) 1989-11-29 1989-11-29 撹伴ローラ
JP310961/89 1989-11-29
JP310955/89 1989-11-29
JP310960/89 1989-11-29
JP1310961A JPH07111595B2 (ja) 1989-11-29 1989-11-29 撹拌ローラ

Publications (3)

Publication Number Publication Date
EP0430098A2 EP0430098A2 (de) 1991-06-05
EP0430098A3 EP0430098A3 (en) 1993-03-17
EP0430098B1 true EP0430098B1 (de) 1995-05-03

Family

ID=27339133

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90122401A Expired - Lifetime EP0430098B1 (de) 1989-11-29 1990-11-23 Zuführrolle zum Mischen eines Pulvers

Country Status (2)

Country Link
EP (1) EP0430098B1 (de)
DE (1) DE69019113T2 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5204721A (en) * 1991-08-26 1993-04-20 Xerox Corporation Developer auger for use in an electrophotographic printing machine
WO1994003842A1 (de) * 1992-07-30 1994-02-17 Siemens Nixdorf Informationssysteme Aktiengesellschaft Entwicklerstation für ein elektrofotografisches druck- oder kopiergerät
US5715502A (en) * 1995-07-26 1998-02-03 Mita Industrial Co., Ltd. Toner conveyer
JP4492665B2 (ja) * 2007-10-03 2010-06-30 富士ゼロックス株式会社 現像剤撹拌搬送部材、現像装置及びこれを備えた画像形成装置
CN111686633B (zh) * 2020-06-24 2022-09-16 新疆西泉建设工程有限公司 一种建筑材料精准配料装置
CN114939378B (zh) * 2022-05-18 2023-10-20 浙江亚峰药厂有限公司 复方氨酚烷胺微丸用均匀混合制备装置及工艺

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60184068U (ja) * 1984-05-16 1985-12-06 京セラミタ株式会社 二成分系現像装置の攪拌ローラ
JPS6287735U (de) * 1985-11-19 1987-06-04

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60140969U (ja) * 1984-02-27 1985-09-18 京セラミタ株式会社 現像剤撹拌装置
EP0161795B1 (de) * 1984-05-16 1988-01-13 Mita Industrial Co. Ltd. Entwicklungsapparat
US4711551A (en) * 1985-09-13 1987-12-08 Sanyo Electric Co., Ltd. Developing apparatus
JPS6347353U (de) * 1986-09-17 1988-03-31

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60184068U (ja) * 1984-05-16 1985-12-06 京セラミタ株式会社 二成分系現像装置の攪拌ローラ
JPS6287735U (de) * 1985-11-19 1987-06-04

Also Published As

Publication number Publication date
EP0430098A2 (de) 1991-06-05
DE69019113T2 (de) 1995-10-12
DE69019113D1 (de) 1995-06-08
EP0430098A3 (en) 1993-03-17

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