GB2017946B - Removable light box - Google Patents

Removable light box

Info

Publication number
GB2017946B
GB2017946B GB7909047A GB7909047A GB2017946B GB 2017946 B GB2017946 B GB 2017946B GB 7909047 A GB7909047 A GB 7909047A GB 7909047 A GB7909047 A GB 7909047A GB 2017946 B GB2017946 B GB 2017946B
Authority
GB
United Kingdom
Prior art keywords
light box
removable light
removable
box
light
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
GB7909047A
Other versions
GB2017946A (en
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.)
Novartis AG
Original Assignee
Ciba Geigy AG
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 Ciba Geigy AG filed Critical Ciba Geigy AG
Priority to GB7909047A priority Critical patent/GB2017946B/en
Priority to IT48533/79A priority patent/IT1164671B/en
Publication of GB2017946A publication Critical patent/GB2017946A/en
Application granted granted Critical
Publication of GB2017946B publication Critical patent/GB2017946B/en
Expired legal-status Critical Current

Links

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
    • G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52—Details
    • G03B27/54—Lamp housings; Illuminating means
    • G03B27/545—Lamp housings; Illuminating means for enlargers
    • 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
    • G03B27/727—Optical projection devices wherein the contrast is controlled optically (e.g. uniform exposure, two colour exposure on variable contrast sensitive material)

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Projection-Type Copiers In General (AREA)
GB7909047A 1978-03-31 1979-03-14 Removable light box Expired GB2017946B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB7909047A GB2017946B (en) 1978-03-31 1979-03-14 Removable light box
IT48533/79A IT1164671B (en) 1978-03-31 1979-03-29 GROUP OF LAMPS WITH REMOVABLE LIGHT BOX TO PRODUCE PHOTO COPIES

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1262878 1978-03-31
GB7909047A GB2017946B (en) 1978-03-31 1979-03-14 Removable light box

Publications (2)

Publication Number Publication Date
GB2017946A GB2017946A (en) 1979-10-10
GB2017946B true GB2017946B (en) 1982-03-31

Family

ID=26249152

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7909047A Expired GB2017946B (en) 1978-03-31 1979-03-14 Removable light box

Country Status (2)

Country Link
GB (1) GB2017946B (en)
IT (1) IT1164671B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54131932A (en) * 1978-03-31 1979-10-13 Ciba Geigy Ag Lamp box
US4299204A (en) * 1980-05-21 1981-11-10 Cotsworth John L Solar collector
DE3402345A1 (en) * 1983-01-25 1984-08-09 Fuji Photo Film Co., Ltd., Minami Ashigara, Kanagawa COPYING TABLE FOR A REPRODUCTION CAMERA

Also Published As

Publication number Publication date
GB2017946A (en) 1979-10-10
IT7948533A0 (en) 1979-03-29
IT1164671B (en) 1987-04-15

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940314