Abstract: A rotary printing machine for printing several colors on continuously fed sheets comprises a cylinder for driving a web disposed at the web inlet in the printing machine and coupled to a speed variator.A rotary cutting device is disposed downstream of the web driving cylinder, and means are provided for rotating said rotary cutting device at constant speed. The printing machine also comprises a drum provided on its periphery with regularly distributed grippers, normally closed by springs and of which the opening is controlled by fixed opening ramps.This drum forms a single large-diameter impression cylinder in contact, at different points of its periphery, with the blanket cylinders of the different printing units. This impression cylinder is mounted to rotate about a horizontal and transverse axis on a support frame mounted for horizontal and longitudinal slide, and means are provided for causing the support frame to slide towards and away from the blanket cylinders of the various printing units.

Abstract: An offset printing machine comprises a plate cylinder and a blanket cylinder respectively carrying roller tracks rolling on one another and determining the center distance between the two cylinders. At least one inking roller with a supple peripheral layer, fed with ink from an inking assembly, is carried by levers pivoted about the axis of an inking cylinder and it carries roller tracks in contact with those of the plate cylinder. The shaft of the inking roller is mounted in its roller tracks via eccentric hubs locked on the shaft and pivoting in the roller tracks via bearings, and one end of this shaft is fast with a gear coupled to a control shaft for adjusting the pressure contact of the inking roller upon the plate cylinder.

Abstract: This installation for drying, by controlled evaporation, humidified and agglomerated caster sugar comprises an oven with a plurality of sections. Conveying means are provided for passing the products to be dried successively through these sections, between the entrance and exit of the oven. Means are provided for extracting the air, said means being connected to the median part of the oven, in order permanently to suck in the ambient air through the entrance and exit of the oven, which are left free. In each section of the oven means are also provided for producing an auxiliary air stream oriented perpendicularly to the direction of displacement of the products to be dried.

Abstract: A multi-color printing machine having a plurality of printing units is provided with means for compensating for errors in color registration, for example a device for varying the length of web between one unit and the next, and at least one device for preventing the tension in the web from exceeding an upper limit or falling below a lower limit.

Abstract: This method is provided for preconditioning lumps of sugar obtained from humidified and agglomerated caster sugar, before these lumps are dried.The sugar lumps are heated, after moulding, by means of an infra-red heating. The lumps are heated for a very short, but sufficient period of time for a cloud of steam-saturated atmosphere to be constituted around each lump, this cloud forming a barrier against the infra-red radiation and avoiding the rapid drying of the lump, and for the temperature attained by this lump on entering the oven to be higher than the dew point.

Abstract: The present invention relates to an inking device for printing with greasy ink, said device being characterized in that it comprises, downstream of the zone of contact of the inking roller and the plate or photogravure cylinder, a second rod parallel to the inking roller, pressed under strong pressure against the soft surface layer of said roller and forming a barrier only against the dampening liquid, while allowing all the residual film of ink remaining on the periphery of the inking roller to pass and thus return to the mass of ink in the inking device. This invention is more particularly applicable in printing machines employing greasy ink, such as offset or typo printers.

Abstract: A rotary multi-color printing machine comprises a frame and a plurality of printing units each of which prints in a different color on sheet material passing through the machine. The printing units are mounted one above another in the frame so that the sheet material can pass successively through the printing units. Each printing unit comprises a counter-pressure roll, a blanket roll, a plate roll and an inking roll, the axes of the rolls being parallel. The plate roll and the blanket roll of each printing unit are rotatably mounted in a support. The counter pressure roll of each printing unit is rotatably mounted in the frame on one side of the support, and the inking roll of each printing unit is rotatably mounted in the frame on the other side of the support. The support is slidable relative to the frame in a direction which is horizontal and axial relative to the rolls.

Abstract: A method of grooving sheet material along a line about which the material is subsequently to be folded comprises the step of forming, along said line, an impression. The impression forms a groove on one side of the material, the groove being intended to form the outer face of the edge of the fold when the material has been folded. The impression also forms, on the other side of the material, a corresponding bead which is intended to be located on the inside of the fold. Two parallel and opposite lines of elongate depressions are formed in the bead during the formation of the impression, the lines of depressions being formed one on each side of the central longitudinal axis of the bead. Each depression is constituted a portion of material which is of reduced thickness and which creates a localized zone of reduced strength.