| 摘要 |
PURPOSE:To eliminate inconveniences, by setting the ratio N1:N2 of the numbers of revolutions of a sprocket and a rewinding fork at (N1/N2)>=(N1/n2) when the total number of revolutions necessary for feeding the whole of the film by winding and rewinding are defined as n1, n2 respectively. CONSTITUTION:A motor driven winding and rewinding camera is so constituted as to wind and rewind a film in accordance with the normal and reverse running of a motor 1. Winding wheel trains and rewinding wheel trains are so set that the ratio N1:N2 of the number of revolutions of a sprocket 85 and a rewinding fork 37 attains (N1/N2)>=(n1/n2) when the total number of revolution of the sprocket 85 necessary for feeding the whole of the film by winding is defined as n1 and the total number of revolutions of the rewinding fork 37 necessary for rewinding the whole of the film is defined as n2. The stretch of the film between the sprocket and a curtridge shaft is then prevented and inconveniences such as the damage on the emulsion surface are obviated. |
