CH591716A5CH1280775ACH1280775ACH591716A5CH 591716 A5CH591716 A5CH 591716A5CH 1280775 ACH1280775 ACH 1280775ACH 1280775 ACH1280775 ACH 1280775ACH 591716 A5CH591716 A5CH 591716A5
Authority
CH
Switzerland
Application number
CH1280775A
Original Assignee
Ritzerfeld Gerhard
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 Ritzerfeld GerhardfiledCriticalRitzerfeld Gerhard
Publication of CH591716A5publicationCriticalpatent/CH591716A5/xx
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
G03B27/62—Holders for the original
G03B27/6207—Holders for the original in copying cameras
G03B27/6242—Masks; Overlays; Transparent carriers
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others
(AREA)
Holders For Sensitive Materials And Originals
(AREA)
Combination Of More Than One Step In Electrophotography
(AREA)