GB1367255A - Method and apparatus for controlling electrical elements of electro- photographic copying machines - Google Patents

Method and apparatus for controlling electrical elements of electro- photographic copying machines

Info

Publication number
GB1367255A
GB1367255A GB1168572A GB1168572A GB1367255A GB 1367255 A GB1367255 A GB 1367255A GB 1168572 A GB1168572 A GB 1168572A GB 1168572 A GB1168572 A GB 1168572A GB 1367255 A GB1367255 A GB 1367255A
Authority
GB
United Kingdom
Prior art keywords
electrodes
electro
thyristor
switch
march
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
Application number
GB1168572A
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.)
Cellophane SA France
Original Assignee
Cellophane SA France
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 Cellophane SA France filed Critical Cellophane SA France
Publication of GB1367255A publication Critical patent/GB1367255A/en
Expired legal-status Critical Current

Links

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
    • G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
    • 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
    • G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0291—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices corona discharge devices, e.g. wires, pointed electrodes, means for cleaning the corona discharge device

Abstract

1367255 Proximity switch LA CELLOPHANE 13 March 1972 [15 March 1971] 11685/72 Heading G1N Variations in electrical characteristics of a corona charging device of an electro-photographic copying machine due to a sheet of paper inserted therein are used to switch on auxillary components of the machine. A high discharge voltage from generator G is connected across electrodes B, B' each including a pair of parallel conductors F, F or F, F' surrounded by earthed screens E, E'. When a sheet of paper indicated by dashed line is passed into the device between electrodes B, B' the capacitance and hence leak resistance between the two electrodes increases resulting in an increase in potential drop across B, B'. This has the effect of increasing the leakage currents flowing between the electrodes and their respective screens E, E' so that the potential at point A rises to trigger on thyristor T and energize relay L to close switch K and complete the supply circuit to the lamps of the machine. Capacitor C maintains the relay energized during the negative half cycle of the supply when the thyristor is non-conducting.
GB1168572A 1971-03-15 1972-03-13 Method and apparatus for controlling electrical elements of electro- photographic copying machines Expired GB1367255A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7108886A FR2129075A5 (en) 1971-03-15 1971-03-15

Publications (1)

Publication Number Publication Date
GB1367255A true GB1367255A (en) 1974-09-18

Family

ID=9073512

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1168572A Expired GB1367255A (en) 1971-03-15 1972-03-13 Method and apparatus for controlling electrical elements of electro- photographic copying machines

Country Status (8)

Country Link
US (1) US3727113A (en)
JP (1) JPS5760624B2 (en)
BE (1) BE780601A (en)
FR (1) FR2129075A5 (en)
GB (1) GB1367255A (en)
IT (1) IT957558B (en)
LU (1) LU64954A1 (en)
NL (1) NL147863B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2460057B2 (en) * 1974-12-19 1977-02-10 Robert Bosch Gmbh, 7000 Stuttgart SWITCH ARRANGEMENT WITH A STRIKE FIELD CAPACITOR
JPS53122932U (en) * 1977-03-07 1978-09-30
US4652754A (en) * 1985-12-23 1987-03-24 Eastman Kodak Company Corona generating apparatus
GB2194491B (en) * 1986-08-22 1990-04-04 James Ind Ltd Invalid hoists
JP4240123B2 (en) * 2007-01-31 2009-03-18 ブラザー工業株式会社 Image forming apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3339125A (en) * 1964-08-03 1967-08-29 Leonard B Almy Proximity detectors
US3493791A (en) * 1966-08-12 1970-02-03 Hall Barkan Instr Inc Two-wire solid state direct touch responsive semiconductor switch circuit

Also Published As

Publication number Publication date
DE2211351B2 (en) 1975-12-11
JPS4831948A (en) 1973-04-26
NL147863B (en) 1975-11-17
NL7203297A (en) 1972-09-19
US3727113A (en) 1973-04-10
JPS5760624B2 (en) 1982-12-20
FR2129075A5 (en) 1972-10-27
DE2211351A1 (en) 1972-09-28
BE780601A (en) 1972-07-03
LU64954A1 (en) 1972-07-10
IT957558B (en) 1973-10-20

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee