GB1310444A – Electrostatic image development apparatus
– Google Patents
GB1310444A – Electrostatic image development apparatus
– Google Patents
Electrostatic image development apparatus
Info
Publication number
GB1310444A
GB1310444A
GB3161470A
GB3161470A
GB1310444A
GB 1310444 A
GB1310444 A
GB 1310444A
GB 3161470 A
GB3161470 A
GB 3161470A
GB 3161470 A
GB3161470 A
GB 3161470A
GB 1310444 A
GB1310444 A
GB 1310444A
Authority
GB
United Kingdom
Prior art keywords
electrode
potential
flow
held
toner
Prior art date
1969-07-03
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
Application number
GB3161470A
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.)
1969-07-03
Filing date
1970-06-30
Publication date
1973-03-21
1970-06-30
Application filed by Xerox Corp
filed
Critical
Xerox Corp
1973-03-21
Publication of GB1310444A
publication
Critical
patent/GB1310444A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
G03G15/0801—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer for cascading
Abstract
1310444 Electro-photographic development apparatus XEROX CORP 30 June 1970 [3 July 1969 (4)] 31614/70 Heading G2H A development electrode in an opposed flow, two component developer system is in close parallel relationship with a photo-conductive surface 10 and provides an increasing potential difference in the direction of travel of surface 10 being formed of three control members 70, 71, 72 each held at a different potential, the potentials being chosen to control the toner concentration gradient across the flow of developer. Two of the control members 70, 71 have indentations for redirecting the developer flow on to the surface 10. The first electrode member 70 (in the direction of travel of surface 10 through the development zone) is held at a potential lower than in the background areas of the charge image so that toner particles are forced upwards towards the surface 10 producing a high toner concentration adjacent the surface 10. Toner particles are dislodged from carrier particles by impaction on the drum surface 10 caused by a chamfer 74 on the edge of the electrode 70. The second electrode member 71 is held at a potential intermediate that in the image and non-image areas resulting in the removal of toner from background areas as well as development in image areas. “Lead edge effect” is reduced by providing a groove (85) Fig. 4, (not shown) in the inverted portion of electrode 71 so as to direct the developer flow into contact with the drum surface 10. The third electrode 72, acting as a clean-up electrode, is held at a potential 150-700 volts above the potential in image areas thereby attracting toner particles to the electrode side of the flow and allowing denuded carrier particles to remove weakly adhering particles from the surface 10.
GB3161470A
1969-07-03
1970-06-30
Electrostatic image development apparatus
Expired
GB1310444A
(en)
Applications Claiming Priority (4)
Application Number
Priority Date
Filing Date
Title
US83877869A
1969-07-03
1969-07-03
US83891469A
1969-07-03
1969-07-03
US83881769A
1969-07-03
1969-07-03
US83877969A
1969-07-03
1969-07-03
Publications (1)
Publication Number
Publication Date
GB1310444A
true
GB1310444A
(en)
1973-03-21
Family
ID=27505891
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3161470A
Expired
GB1310444A
(en)
1969-07-03
1970-06-30
Electrostatic image development apparatus
Country Status (12)
Country
Link
JP
(2)
JPS4837611B1
(en)
AR
(1)
AR199542A1
(en)
BE
(1)
BE752943A
(en)
CH
(1)
CH528761A
(en)
DE
(1)
DE2032046C3
(en)
DK
(1)
DK128800C
(en)
FR
(1)
FR2054088A5
(en)
GB
(1)
GB1310444A
(en)
NL
(1)
NL7009833A
(en)
NO
(1)
NO132115C
(en)
PL
(1)
PL80968B1
(en)
SE
(1)
SE359387B
(en)
Families Citing this family (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE19546248A1
(en)
*
1995-12-12
1997-06-19
Heidelberger Druckmasch Ag
Electrostatic latent image development on movable intermediate carrier
DE19547546A1
(en)
*
1995-12-20
1997-07-03
Heidelberger Druckmasch Ag
Device for acting on sheets in a sheet delivery
1970
1970-06-08
JP
JP4942770A
patent/JPS4837611B1/ja
active
Pending
1970-06-29
DE
DE19702032046
patent/DE2032046C3/en
not_active
Expired
1970-06-29
CH
CH980770A
patent/CH528761A/en
not_active
IP Right Cessation
1970-06-30
GB
GB3161470A
patent/GB1310444A/en
not_active
Expired
1970-06-30
SE
SE906270A
patent/SE359387B/xx
unknown
1970-06-30
NO
NO256270A
patent/NO132115C/no
unknown
1970-07-01
PL
PL14172670A
patent/PL80968B1/en
unknown
1970-07-02
AR
AR22977570A
patent/AR199542A1/en
active
1970-07-02
NL
NL7009833A
patent/NL7009833A/xx
not_active
Application Discontinuation
1970-07-02
DK
DK346070A
patent/DK128800C/en
active
1970-07-03
FR
FR7024665A
patent/FR2054088A5/fr
not_active
Expired
1970-07-03
BE
BE752943D
patent/BE752943A/en
unknown
1973
1973-01-11
JP
JP625073A
patent/JPS50130452A/ja
active
Pending
Also Published As
Publication number
Publication date
NL7009833A
(en)
1971-01-05
BE752943A
(en)
1971-01-04
DE2032046A1
(en)
1971-01-28
DK128800B
(en)
1974-07-01
JPS4837611B1
(en)
1973-11-12
AR199542A1
(en)
1974-09-13
JPS50130452A
(en)
1975-10-15
DE2032046B2
(en)
1978-02-09
SE359387B
(en)
1973-08-27
DE2032046C3
(en)
1978-10-12
CH528761A
(en)
1972-09-30
NO132115B
(en)
1975-06-09
DK128800C
(en)
1974-11-11
PL80968B1
(en)
1975-08-30
FR2054088A5
(en)
1971-04-16
NO132115C
(en)
1975-09-17
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Legal Events
Date
Code
Title
Description
1973-08-01
PS
Patent sealed
1982-02-03
PCNP
Patent ceased through non-payment of renewal fee
