Abstract: An inking device of a printing unit includes an ink reservoir, an ink film pick-up roller which has a shaft, and an inking roller having a shaft. A detector detects the distance between the inking roller and the pick-up roller and/or an angular displacement of the two shafts relative to each other and providing an output signal which represents this distance and/or this angular displacement. A controller angularly the second shaft relative to the first shaft, and the controller is capable of reducing the angular displacement and of positioning the pick-up roller in accordance with the output signal.

Abstract: The sheet transporting device of the invention includes: a transferring device (64) adapted to transfer a sheet (30), a conveying device (66; 66A) for conveying a sheet transferred from the transferring device (64) onto the conveying device, and a controlling means (76) adapted to control the speed of the conveying device (66; 66A) and defining a transfer cycle (CT). The controlling means (76) is adapted to slow down the conveying device (66) when a sheet is conveyed by the related conveying device and to accelerate the conveying device when no sheet is present on said conveying device. The invention can be used for the cutting devices of rotary printing machines.

Abstract: The invention relates to a sheet (30) conveying device (D1, D2) comprising a transport roll (56, 58) for conveying a flat substrate (18, 30), said transport roll having a transport surface (82, 102) which comes into contact with the flat substrate and has a plurality of recesses (84, 104), and a vacuum device (64) for creating a depression in the plurality of recesses. The device also comprises a device (120) for cleaning the transport surface (82, 102). The invention is applicable to devices for ejecting sheets from printing presses.

Abstract: A transporting cylinder (54) for a flat substrate, including a cylindrical base body (70) that has a cylindrical base body surface (74) having a first material and that has openings (82) leading out onto the cylindrical surface. The transporting cylinder (54) includes a sleeve (72) arranged on the cylindrical surface (74), the covering element having a plurality of through-holes (92) aligned with at least some of the openings (82). The sleeve (72) has an outer covering surface (88) made from a second material. The outer surface (88) has a surface energy lower than the surface energy of the first material.

Abstract: Device for moulding thermoplastic containers by the blow moulding of preforms, comprising a mould (1) and a blowing assembly (2) with a nozzle (16) that can move axially between a raised position and a blowing position in fluid connection with a preform supported in the cavity of the mould. The half-moulds (3a, 3b) of the mould bear respective parts (Aa, Ab) together forming a male element (A) bordered by a wall (12) inclined towards the nozzle. The blowing assembly bears a female element (B) formed by a clamp (26) having an internal wall (30) complementary to the wall of the protuberance. In the blowing position, the cooperation between the male and female elements (A, B) locks the upper part of the closed mould.

Abstract: Device for moulding thermoplastic containers by blow-moulding hot preforms, comprising a mould (1) and blow-moulding means (2) comprising a bell nozzle (8) which is axially displaceable between a raised position and a blow-moulding position in abutment against the mould; the driving means comprising mechanical means (12) with a cam follower roller (13)/cam (14) and pneumatic means (16) with a piston (18) integral with the upper end of the nozzle and sliding in a fixed enclosure (17), defining therein an upper chamber (19) connected to a source (24) of control fluid and a lower chamber (20) connected to this source and to the upper chamber via a solenoid valve (26); the upper face of the piston has a surface area which is greater than that of its lower face and that of the bell (9) of the nozzle.

Abstract: A mold for fabricating containers made of thermoplastic material by blow-molding or stretch-blow molding a blank, which mold has a seat situated at the opening in the molding cavity for the purpose of receiving the rim of said blank, and cooling means for cooling said rim and, between said cooling means and the impression of the shoulder of the cavity of the mold, said mold has thermal insulation means for breaking a thermal bridge. The cooling circuit for cooling the rim is etched in a lid that is mounted around the opening of the cavity of the mold, and this etched portion rests in leaktight manner on a piece that acts as a thermal insulator.

Abstract: The mould carrier unit for manufacturing containers by a stretch blow-moulding operation of preforms (3) arranged in moulds (2), comprises: on the one hand, a stretching rod (10) borne by a slide (13) which is mobile between an inactive position and an active position where its free end reaches the bottom of said mould (2), on the other hand, a nozzle (15) comprising a fixed body (16) extended by a bell (20), which is mobile under the action of appropriate means for passing from an inactive position where its free edge (25) is held substantially at the same level as the free end (11) of the stretching rod (10) to an active position where it is sealingly applied against the inlet surface (4) of the mould (2), to close the circuit of the blowing fluid, and said bell (20) comprises a bar (21) provided with a stop (23), which stop (23) cooperates with a support (24) formed on said slide (13) to permit said bell (20) to pass from its active position to the inactive position with the same law of motion as said s

Abstract: The invention relates to a blowing or stretch-blowing device (1) for making vessels from thermoplastic blanks with a collar, that comprises a blowing nozzle (3) mobile between an upper position and a lower position for blowing a pressurised fluid into a blank having a body provided in the moulding cavity of a mould and having a collar protruding outside the mould, the device includes a clamping means (4) provided above the mould and capable of holding a blank by the collar thereof, a holding means (20, 21) for the clamping means for moving the same between two raised or lowered positions, wherein at least one branch (7, 8) of the clamping means being transversally mobile; mechanical coupling means (5) provided between the clamping means and the blowing nozzle and capable of synchronising the movements of the clamping means with the movement of the blowing nozzle.

Abstract: The invention relates to a moulding device for producing vessels by blowing or stretch-blowing from preforms of a heated thermoplastic material, the device including at least one mould that has at least two half-moulds and a driving mechanism for moving the half-moulds between an open position and a closed position. The two half-moulds are hinged together for rotation about a hinge axis included in the junction plane and perpendicular to the axis of the moulding cavity, the hinge axis being located under the half-moulds, while a mechanism for locking the half-moulds in their closed position are also provided. Each half-mould includes an outer surface area capable of abutment with an inner surface area of the mechanism for locking the half-moulds in their closed position. The locking mechanism is in the form of a clamp capable of clamping the two half-moulds in their closed position.

Abstract: A rotary printing machine including a continuous web of material to be printed, the web having two sides, and at least one printing unit designed to print on the web. It includes a powdering device, designed to deposit powder on at least one of the two sides of the web printed by the printing unit. For use in magazine printing presses.

Abstract: Device for moulding thermoplastic containers by blow-moulding hot preforms, comprising a mould (1) and blow-moulding means (2) comprising a bell nozzle (8) which is axially displaceable between a raised position and a blow-moulding position in abutment against the mould; the driving means comprising mechanical means (12) with a cam follower roller (13)/cam (14) and pneumatic means (16) with a piston (18) integral with the upper end of the nozzle and sliding in a fixed enclosure (17), defining therein an upper chamber (19) connected to a source (24) of control fluid and a lower chamber (20) connected to this source and to the upper chamber via a solenoid valve (26); the upper face of the piston has a surface area which is greater than that of its lower face and that of the bell (9) of the nozzle.

Abstract: Device for moulding thermoplastic containers by the blow moulding of preforms, comprising a mould (1) and a blowing assembly (2) with a nozzle (16) that can move axially between a raised position and a blowing position in fluid connection with a preform supported in the cavity of the mould. The half-moulds (3a, 3b) of the mould bear respective parts (Aa, Ab) together forming a male element (A) bordered by a wall (12) inclined towards the nozzle. The blowing assembly bears a female element (B) formed by a clamp (26) having an internal wall (30) complementary to the wall of the protuberance. In the blowing position, the cooperation between the male and female elements (A, B) locks the upper part of the closed mould.

Abstract: A molding device for blow molding recipients made of a thermoplastic material, including a mold having two mold halves which are movable with respect to each other and provided with a locking device extending along the total height of the mold halves and including two respective hooks, which are oriented toward each other, two respective recesses adjacent to the hooks and a rotatable gib adjacent to the hook and interacting with the other hook in such a way that the two mold-halves are locked in the closed position thereof or are released from each other, the gib being inserted into the recess.

Abstract: The invention provides a cooling system for cooling a rotary mount (2) comprising two rings (4, 7) capable of rotating relative to each other, each ring having a raceway, the mount further comprising a bearing device constituted by rolling bodies interposed between the two raceways, the cooling system being characterized in that it comprises at least one circuit for passing a cooling fluid, which circuit is pressed against one of the two rings (4, 7) of said mount. It also provides a rotary mount including such a system, and a machine, in particular a blow-molding machine, including such a mount.

Abstract: A molding device for blow molding recipients made of a thermoplastic material, including a mold having two mold halves which are movable with respect to each other and provided with a locking device extending along the total height of the mold halves and including two respective hooks, which are oriented toward each other, two respective recesses adjacent to the hooks and a rotatable gib adjacent to the hook and interacting with the other hook in such a way that the two mold-halves are locked in the closed position thereof or are released from each other, the gib being inserted into the recess.

Abstract: An inking device of a printing unit includes an ink reservoir, an ink film pick-up roller which has a shaft, and an inking roller having a shaft. A detector detects the distance between the inking roller and the pick-up roller and/or an angular displacement of the two shafts relative to each other and providing an output signal which represents this distance and/or this angular displacement. A controller angularly the second shaft relative to the first shaft, and the controller is capable of reducing the angular displacement and of positioning the pick-up roller in accordance with the output signal.

Abstract: This process for controlling the quantity of ink applied to a material being printed comprises the stages of: driving an inking roller (14) and a printing roller (8) at first inking and printing speeds, changing the printing speed to a second printing speed, changing the inking speed to a second inking speed on the basis of a speed correction index, measuring a first and a second quantity of ink, calculating the difference in the quantities of ink applied, and altering the speed correction parameter on the basis of the difference in the quantity of ink printed. Application to offset presses.

Abstract: The invention provides a cooling system for cooling a rotary mount (2) comprising two rings (4, 7) capable of rotating relative to each other, each ring having a raceway, the mount further comprising a bearing device constituted by rolling bodies interposed between the two raceways, the cooling system being characterized in that it comprises at least one circuit for passing a cooling fluid, which circuit is pressed against one of the two rings (4, 7) of said mount. It also provides a rotary mount including such a system, and a machine, in particular a blow-molding machine, including such a mount.

Abstract: Dual-flow filter for the biological purification of effluents, particularly water, comprising at least two filtration cells, arranged in series, in fluid communication, with one another so that the effluent to be treated passes through them successively, these two cells being separated by an intermediate box provided with aeration means, wherein the first filtration cell is of the ascending flow type and the second filtration cell is of the descending flow type, and the aeration in the intermediate box takes place countercurrentwise with respect to the liquid flow moving through the box, with a movement of the flows guided with the aid of a siphon partition.