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Priority to DD17740474ApriorityCriticalpatent/DD115231A1/xx
Priority to DE19742457420prioritypatent/DE2457420A1/de
Publication of DD115231A1publicationCriticalpatent/DD115231A1/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
G03B9/00—Exposure-making shutters; Diaphragms
G03B9/08—Shutters
G03B9/28—Roller blind or flexible plate
G03B9/32—Double blind
G03B9/34—Double blind with adjustable slot; with mechanism controlling relative movement of blinds to form slot