EP 0537068 B1 19960911 - Method for subtitling cinematographic films
Title (en)
Method for subtitling cinematographic films
Title (de)
Verfahren zum Untertiteln kinematographischer Filme
Title (fr)
Procédé de sous-titrage de films cinématographiques
Publication
Application
Priority
FR 9112580 A 19911011
Abstract (en)
[origin: EP0537068A1] The process for subtitling cinematographic films intended to apply graphic components, characters or texts to a cinematographic film with the aid of a laser beam running over the region to be marked on the film comprises the following two stages: in a first stage, a laser etching operation is carried out by virtue of the application of a laser beam whose speed of travel at the film is between approximately 1cm/s and 200cm/s and whose power at the film is between approximately 100 milliwatts and approximately 20 watts, the S/P ratio of the speed of travel expressed in cm/s to the power at the film, expressed in watts, being between 10 and 30 and sufficiently high for the laser beam to perform a complete conversion of the emulsion in the etched regions by causing a heating, a softening and a dislocation of the emulsion without effecting a complete removal of this converted emulsion; and, in a second stage, the etched film is subjected to a treatment for cleaning the etched regions, especially by placing the film in contact with a bath which ensures the removal, in the regions of the film which were previously marked by the low-power laser beam, of the particles of emulsion which have been heated and dislocated by the laser beam, thus allowing transparent subtitles to appear.
IPC 1-7
IPC 8 full level
G03C 11/02 (2006.01)
CPC (source: EP US)
G03C 11/02 (2013.01 - EP US); Y10S 430/146 (2013.01 - EP US); Y10S 430/153 (2013.01 - EP US); Y10S 430/165 (2013.01 - EP US)
Citation (examination)
US 4766009 A 19880823 - IMURA MIDORI [JP], et al
Designated contracting state (EPC)
AT BE CH DE DK ES GB IT LI NL PT SE
DOCDB simple family (publication)
EP 0537068 A1 19930414; EP 0537068 B1 19960911; AT E142796 T1 19960915; CA 2080385 A1 19930412; CA 2080385 C 19990907; DE 69213639 D1 19961017; DE 69213639 T2 19970320; DK 0537068 T3 19970217; ES 2095436 T3 19970216; FR 2682520 A1 19930416; FR 2682520 B1 19940211; IL 103409 A0 19930315; IL 103409 A 19951127; US 5367348 A 19941122
DOCDB simple family (application)
EP 92402738 A 19921008; AT 92402738 T 19921008; CA 2080385 A 19921007; DE 69213639 T 19921008; DK 92402738 T 19921008; ES 92402738 T 19921008; FR 9112580 A 19911011; IL 10340992 A 19921011; US 95878692 A 19921009