Abstract: The present invention relates to a process and control device to grind a knife shaft used in a machine intended for cutting sheets of materials into strips, for example, sheets of paper, plastic, plates of photosensitive film or any other material having the form of thin sheets. The process includes determining the actual differences of position of the knives of the knife shaft in relation to a theoretical position and then dividing these differences to cut the film strips by widths practically equal to one another, and determining the quantities of material to be eliminated by grinding for each knife. This process especially finds its principal application in the photographic industry, in particular on grinding machines for the knives of knife shafts equipping the film slitters.

Abstract: The present invention relates to a control device to grind a knife shaft used in a machine intended for cutting sheets of materials into strips, for example sheets of paper, plastic, plates of photosensitive film or any other material having the form of thin sheets. The control device according to the invention enables the grinding of the knives of knife shafts of a slitter by checking and controlling the drift of the dimensional differences of position of the knives on the knife shaft and by controlling the variability of the pitches between the knives. This with the goal of obtaining the precision and the quality of cutting required for cut photographic film strips. This device especially finds its principal application in the photographic industry, in particular on grinding machines for the knives of knife shafts equipping the film slitters.

Abstract: The present invention relates to a control device to grind a knife shaft used in a machine intended for cutting sheets of materials into strips, for example sheets of paper, plastic, plates of photosensitive film or any other material having the form of thin sheets. The control device according to the invention enables the grinding of the knives of knife shafts of a slitter by checking and controlling the drift of the dimensional differences of position of the knives on the knife shaft and by controlling the variability of the pitches between the knives. This with the goal of obtaining the precision and the quality of cutting required for cut photographic film strips. This device especially finds its principal application in the photographic industry, in particular on grinding machines for the knives of knife shafts equipping the film slitters.

Abstract: The present invention relates to a process and control device to grind a knife shaft used in a machine intended for cutting sheets of materials into strips, for example, sheets of paper, plastic, plates of photosensitive film or any other material having the form of thin sheets. The process includes determining the actual differences of position of the knives of the knife shaft in relation to a theoretical position and then dividing these differences to cut the film strips by widths practically equal to one another, and determining the quantities of material to be eliminated by grinding for each knife. This process especially finds its principal application in the photographic industry, in particular on grinding machines for the knives of knife shafts equipping the film slitters.

Abstract: In a motion picture recording process, filming defects are reduced by enabling the collection of particles generated over time on a film, just before the exposure of the film in the recording motion-picture camera.