GB1046686A - Masks with graded size holes - Google Patents

Masks with graded size holes

Info

Publication number
GB1046686A
GB1046686A GB2319565A GB2319565A GB1046686A GB 1046686 A GB1046686 A GB 1046686A GB 2319565 A GB2319565 A GB 2319565A GB 2319565 A GB2319565 A GB 2319565A GB 1046686 A GB1046686 A GB 1046686A
Authority
GB
United Kingdom
Prior art keywords
mask
sheet
light
stationary
areas
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
GB2319565A
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.)
Buckbee Mears Co
Original Assignee
Buckbee Mears 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.)
Filing date
Publication date
Application filed by Buckbee Mears Co filed Critical Buckbee Mears Co
Publication of GB1046686A publication Critical patent/GB1046686A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
    • H01J9/22—Applying luminescent coatings
    • H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines
    • H01J9/2271—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines by photographic processes
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F1/00—Etching metallic material by chemical means
    • C23F1/02—Local etching
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/14—Manufacture of electrodes or electrode systems of non-emitting electrodes
    • H01J9/142—Manufacture of electrodes or electrode systems of non-emitting electrodes of shadow-masks for colour television tubes

Abstract

1,046,686. Photographic printers. BUCKBEE-MEARS CO. June 1, 1965, No. 23195/65. Heading G2A. A method of, and apparatus for, photoprinting a pattern of graded size spots on to a sheet 22 of photosensitive material comprises the steps of covering the sheet with a mask 24 including opaque areas and a plurality of uniformly sized transparent areas defining the desired pattern, projecting uniform light of fixed intensity on to the sheet 22 through the mask and varying the exposure time of areas of the film according to the desired size of the corresponding spots. The sheet 22, mounted on a glass support 20, and the mask are rotated inside a light tight housing, a stationary light stop 30 having a slit 44 being provided between the mask and a light source 34 comprising a bulb within a rotating reflector 36. Alternatively, the stop 30 may be rotationally driven while the film and mask remain stationary. In another embodiment (Fig. 4, not shown) a stationary opaque light stop covers the stationary mask, the light stop having a variable aperture to effect different exposure times for different areas of the film.
GB2319565A 1965-06-16 1965-06-01 Masks with graded size holes Expired GB1046686A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6507713A NL6507713A (en) 1965-06-16 1965-06-16

Publications (1)

Publication Number Publication Date
GB1046686A true GB1046686A (en) 1966-10-26

Family

ID=19793398

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2319565A Expired GB1046686A (en) 1965-06-16 1965-06-01 Masks with graded size holes

Country Status (2)

Country Link
GB (1) GB1046686A (en)
NL (1) NL6507713A (en)

Also Published As

Publication number Publication date
NL6507713A (en) 1966-12-19

Similar Documents

Publication Publication Date Title
GB1182598A (en) Photographic Enlarger
US2638040A (en) Apparatus for producing type proof and photoprints thereof
US3680956A (en) Apparatus for controlling contrast during reproduction of photographic images
US3335636A (en) Fully automated process camera
US3469914A (en) Enlarger head for use with variable contrast paper
US1795050A (en) Apparatus for producing margined photographs
GB945600A (en) Photographic printing apparatus
US3279311A (en) Device for producing an even distribution of light on a copying frame
GB1140219A (en) Photocopying apparatus
GB1281439A (en) Photographic enlarger
SE321858B (en)
GB1310495A (en) Production of photographic colour prints
GB1046686A (en) Masks with graded size holes
GB1175493A (en) Improvements in or relating to a Photo-Exposure Device
US1841274A (en) Preparation of photogravure copy and the like
GB1082788A (en) Photo-recording apparatus
ES375556A1 (en) Method of making a graded photo-printing master
US2758504A (en) Production of engine-divided scales
US3582208A (en) Method and means for producing multidensity tint screens
US3318220A (en) Photomechanical apparatus
US1799817A (en) Photographic-printing machine
US3368470A (en) Photocomposing method and apparatus
US3794419A (en) Duplicating machine to convert microfilm to microfiche
GB1524134A (en) Photographic camera exposure indicating device
GB1140881A (en) Photographic enlarger