Pre-exposing method for a photographic film and manufacturing method for a lens-fitted film unit

摘要

A lens-fitted film unit is loaded with a photographic film for which pre-exposure is performed in advance. When the pre-exposure is performed for the photographic film, the photographic film is advanced out of a cartridge shell. The advanced photographic film is pre-exposed every five frames. By performing the pre-exposure for the plural frames at the same time, a process speed of the pre-exposure becomes fast in comparison with a conventional speed. The pre-exposed photographic film is rolled, and is contained in the lens-fitted film unit together with the cartridge shell. As the process speed of the pre-exposure is improved, manufacturing efficiency of the lens-fitted film unit is also improved.