Patent ID: 6659381
Filing Date: 2003-12-09
Classification: G03C

Abstract:
A process for producing a continuous light shielding cloth web to be fitted to a slit of a photographic film cartridge, the slit allowing a photographic film to be drawn out therethrough, the process consisting essentially of the steps of:subjecting an active surface of a continuous cloth web to raising treatment comprising a combination of a rough raising treatment and a subsequent fine raising treatment, whereby the active surface becomes to have a number of raised loops having different heights, most of the raised loops having broken tops; immersing the raised continuous cloth web in water, thereby removing fiber dusts from the raised surface until the number of fiber dusts remaining on the raised surface reaches 30 pieces or less per 1 cm2, the fiber dusts having been produced by the combined raising treatments; recovering the immersed cloth web from water; and drying the recovered continuous cloth, web, thereby obtaining the continuous light shielding cloth web.