Method of detecting image frame and apparatus thereof, method of positioning image frame, photographic film carrier, and method of printing photographic film
Patent 5260740 Issued on November 9, 1993. Estimated Expiration Date: 
May 27, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 27, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod of judging film frame position Apparatus for writing a data onto photosensitive film Method of and apparatus for positioning photographic originals in a copying station Patent #: 4947205 InventorApplicationNo. 889143 filed on 05/27/1992US Classes:355/41, Including photocell355/28, And film severing355/29, With film severing355/50Original moves continuouslyExaminersPrimary: Wintercorn, Richard A.Attorney, Agent or FirmForeign Patent References
International ClassG03B 027/52Foreign Application Priority Data1991-05-28 JPAbstractAn image frame detecting apparatus of the present invention is provided with a light emitting portion provided in one of the respective sides of a guide path for a carrying photographic film, and including a light emitting diode (LED) array having a plurality of LEDs disposed in the transverse direction of the photographic film, a light receiving portion provided in the other of the respective sides of the guide path for the photographic film, and receiving light emitted from the light emitting portion, and a detecting portion for detecting an image frame recorded on the photographic film depending upon the quantity of light received by the light receiving portion. The LEDs has a reduced fluctuation and a reduced range of temperature change so that transmission density of the photographic film can be accurately detected. An image frame and a base portion of the photographic film can be surely discriminated. Further, the extended life of the LED allows to reduce a regular exchanging operation required when a cold-cathode tube or a halogen lamp or the like is used for a light source, and to improve a maintenance efficiency.Other References
| |
