Method for producing photographic film
OwnerNobumitsu Takahashiinventor
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Abstract
A wide-width photographic film is adjusted to have a predetermined supply speed V1 by a sheet feed roller operated by a motor, and it is supplied between upper blades and lower blades. The wide-width photographic film is pressed by an upper blade-pressing mechanism, and it is cut between the upper blades operated by an AC servo motor and rotated at a predetermined circumferential speed V2, and the lower blades operated by the motor and rotated at a predetermined circumferential speed V3. In this process, V1 ×0.1<V2<V1×0.5 is satisfied.
Claims4
A method for producing photographic film, in which a wide-width photographic film composed of a film base of PEN (polyethylene naphthalate) is subjected to shear cut to produce narrow-width photographic films by using upper and lower round blades, wherein:
- a circumferential speed V2 of said upper blade satisfies the following relationship with respect to a supply speed V1 of said wide-width photographic film:
- V1×0.1<V2<V1×0.5.
Dependencies are inferred from the claim text.