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Application filedfiledCritical
Priority to NL7205169ApriorityCriticalpatent/NL7205169A/xx
Publication of NL7205169ApublicationCriticalpatent/NL7205169A/xx
B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
B43L5/00—Drawing boards
B43L5/02—Drawing boards having means for clamping sheets of paper thereto
B43L5/027—Drawing boards having means for clamping sheets of paper thereto with suction devices
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
G03B27/02—Exposure apparatus for contact printing
G03B27/14—Details
G03B27/18—Maintaining or producing contact pressure between original and light-sensitive material
G03B27/20—Maintaining or producing contact pressure between original and light-sensitive material by using a vacuum or fluid pressure