IT1079676B - Sistema di controllo automatico di esposizione per macchine di microfilmatura - Google Patents

Sistema di controllo automatico di esposizione per macchine di microfilmatura

Info

Publication number: IT1079676B
Authority: IT; Italy
Prior art keywords: microfilming; machines; control system; exposure control; automatic exposure
Prior art date: 1976-06-01

Application number

IT49639/77A

Other languages

English (en)

Original Assignee

Bell & Howell Co

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.)

1976-06-01

Filing date

1977-05-31

Publication date

1985-05-13

1977-05-31 Application filed by Bell & Howell Co filed Critical Bell & Howell Co

1985-05-13 Application granted granted Critical

1985-05-13 Publication of IT1079676B publication Critical patent/IT1079676B/it

Classifications

- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B27/00—Photographic printing apparatus
- G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
- G03B27/80—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus in dependence upon automatic analysis of the original

Landscapes

Physics & Mathematics (AREA)
Spectroscopy & Molecular Physics (AREA)
General Physics & Mathematics (AREA)
Control Of Exposure In Printing And Copying (AREA)
Exposure Or Original Feeding In Electrophotography (AREA)
Facsimile Scanning Arrangements (AREA)

IT49639/77A 1976-06-01 1977-05-31 Sistema di controllo automatico di esposizione per macchine di microfilmatura IT1079676B (it)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US05/691,733 US4093376A (en)	1976-06-01	1976-06-01	Automatic exposure control

Publications (1)

Publication Number	Publication Date
IT1079676B true IT1079676B (it)	1985-05-13

Family

ID=24777722

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
IT49639/77A IT1079676B (it)	1976-06-01	1977-05-31	Sistema di controllo automatico di esposizione per macchine di microfilmatura

Country Status (7)

Country	Link
US (1)	US4093376A (it)
JP (1)	JPS52147426A (it)
CA (1)	CA1083397A (it)
CH (1)	CH624777A5 (it)
DE (1)	DE2724573C2 (it)
GB (1)	GB1581885A (it)
IT (1)	IT1079676B (it)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS5436725A (en) *	1977-08-26	1979-03-17	Ricoh Co Ltd	Zerographic copying method
US4272188A (en) *	1979-09-19	1981-06-09	Xerox Corporation	Exposure compensation circuit for a copier
US4255046A (en) *	1979-09-19	1981-03-10	Xerox Corporation	Variable output power supply for flash unit
JPS6051105B2 (ja) *	1979-12-24	1985-11-12	株式会社東芝	自動画質制御複写機
DE3038602C2 (de) *	1980-10-13	1986-09-25	COPYTEX GmbH Sicherheitssysteme, 7730 Villingen-Schwenningen	Verfahren zum Erkennen der Echtheit eines Datenträgers
US4618254A (en) *	1982-10-15	1986-10-21	Ncr Canada Ltd	Automatic light control system
DE3406568A1 (de) *	1983-02-25	1984-08-30	Canon K.K., Tokio/Tokyo	Bilderzeugungsgeraet
DE3407064A1 (de) *	1983-02-28	1984-08-30	Canon K.K., Tokio/Tokyo	Bildreproduktionsgeraet
US4542985A (en) *	1983-04-26	1985-09-24	Canon Kabushiki Kaisha	Image formation apparatus
JPS62234147A (ja) *	1987-03-20	1987-10-14	Minolta Camera Co Ltd	電子写真複写機の自動露光制御装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CA758798A (en) *		1967-05-16	Wahli Robert	Method of photographic reproduction and apparatus therefor
US3728023A (en) *	1971-10-14	1973-04-17	Addressograph Multigraph	Exposure control for electrostatic copiers
US3775009A (en) *	1972-08-23	1973-11-27	Minnesota Mining & Mfg	Photocopier exposure control
GB1452490A (en) *	1973-12-21	1976-10-13	Xerox Corp	Document copying apparatus
DE2446240A1 (de) *	1974-09-27	1976-04-08	Agfa Gevaert Ag	Mikroaufnahmevorrichtung

1976
- 1976-06-01 US US05/691,733 patent/US4093376A/en not_active Expired - Lifetime
1977
- 1977-05-24 CA CA279,060A patent/CA1083397A/en not_active Expired
- 1977-05-26 GB GB22255/77A patent/GB1581885A/en not_active Expired
- 1977-05-27 CH CH652777A patent/CH624777A5/de not_active IP Right Cessation
- 1977-05-31 DE DE2724573A patent/DE2724573C2/de not_active Expired
- 1977-05-31 IT IT49639/77A patent/IT1079676B/it active
- 1977-06-01 JP JP6454277A patent/JPS52147426A/ja active Pending

Also Published As

Publication number	Publication date
US4093376A (en)	1978-06-06
CH624777A5 (it)	1981-08-14
CA1083397A (en)	1980-08-12
GB1581885A (en)	1980-12-31
DE2724573C2 (de)	1986-01-23
JPS52147426A (en)	1977-12-07
DE2724573A1 (de)	1977-12-15

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