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emulsion and faster film. (Illus 6-3 series film strips) Eastman's film
was thinner than Corbutt's and this permitted the development
of camera that worked with flexible film strip instead of
thick sheets. was only short step using a
film strip with perforated edges. The film historian Gordon
Hendricks skeptical this claim, believing that was
made improve Edison's patent position."
The vital development work was carried out Edison's
return and resulted another caveat late 1889 which
defined the new format. Edison had considered the use "long,
tape-like sensitive film" his early sketches 1887, and
was able exploit his telegraphic experience considering
the use rollers move the film the same way that tape
moved through automatic telegraph.
The development film projection also clouded in
. The specifications for film
sent from West Orange defined the standard 35mm width film
used today. Hendricks' persuasive version the
invention hinges Edison's trip Paris where saw the
continuous film strip Marey's laboratory. Hendricks argues that
Edison got the idea for perforated strip from the French
inventor Etienne Marey. Edison supposed
to have said, knew instantly that Marey had the right idea.
The weight the testimony given Edison and the
laboratory employees involved the invention points the
development film strip with perforated edges before the
trip the Paris Exhibition
