Sprocket wheel and lens-fitted photo film unit with the same

Details Sprocket wheel and lens-fitted photo film unit with the same Sprocket wheel and lens-fitted photo film unit with the same

1997-08-26

1999-06-29

Lee, Eddie C.

Photography

With film drive

Film movement limiting means

396397, 396401, 396411, G03B 100, G03B 1742

Patent

active

059180820

ABSTRACT:
A sprocket wheel is used with photo film which includes a plurality of perforation groups arranged in a longitudinal direction thereof and cyclically at a pitch predetermined for one frame. Each of the perforation groups includes first and second perforations arranged at a predetermined distance. The sprocket wheel is rotated by a predetermined amount while the photo film is wound per one frame. The sprocket wheel includes a wheel portion. Four teeth are arranged on a periphery of the wheel portion. A first one of the teeth is meshed with the first perforation. Then a second one of the teeth is meshed with the second perforation. The first and second teeth split the periphery of the wheel portion into first and second arc-shaped faces. The first arc-shaped face is determined in association with the predetermined distance. The second arc-shaped face has a radius greater than a radius of the first arc-shaped face, to push the photo film. The wheel portion, after the second tooth is moved away from the second perforation, is rotated by the photo film with friction between the second arc-shaped face and the photo film.

REFERENCES:
patent: 5476232 (1995-12-01), Kataoka et al.
patent: 5581316 (1996-12-01), Kamoda et al.
patent: 5585877 (1996-12-01), Huang et al.
patent: 5617164 (1997-04-01), Siekierski et al.
patent: 5634161 (1997-05-01), Huang et al.
patent: 5749009 (1998-05-01), Naka et al.
patent: 5790900 (1998-08-01), Katsura et al.
patent: 5875366 (1999-02-01), Yoshida et al.

Affiliated with

Also associated with

Rating

Sprocket wheel and lens-fitted photo film unit with the same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sprocket wheel and lens-fitted photo film unit with the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sprocket wheel and lens-fitted photo film unit with the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1385915