Abstract:
There is described an inking apparatus of a printing press, in particular an offset or letterpress printing press, comprising at least one ink duct (11, 12) with an ink supply roller (13, 14), an ink roller train(30) comprising at least one inking roller (31) which receives ink from the at least one ink duct (11, 12), and at least one vibrator roller (15, 16) interposed between the ink supply roller (13, 4) and the inking roller (31), which vibrator roller (15, 16) is swung back and forth between the ink supply roller (13, 14) and the inking roller (31) and intermittently transfers ink from the ink supply roller (13, 14) to the inking roller (31). A circumference of the vibrator roller (15, 16) exhibits an ink-transfer 10 structure (15a, 16a) which reflects a desired inking profile of a printing plate to be inked by the inking apparatus and is designed to modulate a quantity of ink transferred by the vibrator roller (15, 16). The ink-transfer structure (15a, 16a) on the circumference of the vibrator roller (15, 16) is subdivided, in a circumferential direction (y) of the vibrator roller (15, 16), into an integer number 1 (r) of individual ink-transfer portions (15b, 16b) that are repeated with a determined circumferential period (Δy) in the circumferential direction (y), each individual ink-transfer portion (15b, 16b) reflecting the desired inking profile of the printing plate to be inked by the inking apparatus. A contact length (CL) over which the vibrator roller (15, 16) runs in contact with the ink supply roller (13, 20 4) is equivalent to the determined circumferential period (Δy) of the individual ink-transfer portions (15b, 16b) or to an integer multiple of the determined circumferential period (Δy) of the individualink-transfer portions (15b, 16b).
Abstract:
There is described an inking apparatus of a printing press, in particular an offset or letterpress printing press, comprising at least one ink duct (11, 12) with an ink supply roller (13, 14), an ink roller train(30) comprising at least one inking roller (31) which receives ink from the at least one ink duct (11, 12), and at least one vibrator roller (15, 16) interposed between the ink supply roller (13, 4) and the inking roller (31), which vibrator roller (15, 16) is swung back and forth between the ink supply roller (13, 14) and the inking roller (31) and intermittently transfers ink from the ink supply roller (13, 14) to the inking roller (31). A circumference of the vibrator roller (15, 16) exhibits an ink-transfer 10 structure (15a, 16a) which reflects a desired inking profile of a printing plate to be inked by the inking apparatus and is designed to modulate a quantity of ink transferred by the vibrator roller (15, 16). The ink-transfer structure (15a, 16a) on the circumference of the vibrator roller (15, 16) is subdivided, in a circumferential direction (y) of the vibrator roller (15, 16), into an integer number 1 (r) of individual ink-transfer portions (15b, 16b) that are repeated with a determined circumferential period (Δy) in the circumferential direction (y), each individual ink-transfer portion (15b, 16b) reflecting the desired inking profile of the printing plate to be inked by the inking apparatus. A contact length (CL) over which the vibrator roller (15, 16) runs in contact with the ink supply roller (13, 20 4) is equivalent to the determined circumferential period (Δy) of the individual ink-transfer portions (15b, 16b) or to an integer multiple of the determined circumferential period (Δy) of the individualink-transfer portions (15b, 16b).
Abstract:
There is described a printing press (100) comprising a printing group (2) adapted to apply on a substrate at least one ink or varnish vehicle containing magnetic or magnetisable flakes and at least one magnetic orientation unit (10) located downstream of the printing group (2) along a path of the substrate, which magnetic orientation unit (10) includes at least one magnetic-field-inducing device (12) adapted to orient the magnetic or magnetisable flakes contained in the ink or varnish vehicle applied on the substrate to induce an optically-variable effect in the ink or varnish vehicle. The printing press (100) further comprises a drying/curing unit (15) located along the path of the substrate and cooperating with the magnetic orientation unit (10), which drying/curing unit (15) is adapted to dry or cure the ink or varnish vehicle applied on the substrate following orientation of the magnetic or magnetisable flakes. The drying/curing unit (15) is mounted on a movable supporting structure (16) that is adapted to move the drying/curing unit (15) between a working position (WP), where the drying/curing unit (15) is cooperating with the magnetic orientation unit (10) and which is located proximate to the path of the substrate next to the magnetic orientation unit (10), and a retracted position (RP), where the drying/curing unit (15) is retracted away from the magnetic orientation unit (10) and from the path of the substrate.
Abstract:
There is described a printing press (100) comprising a printing group (2) adapted to apply on a substrate at least one ink or varnish vehicle containing magnetic or magnetisable flakes and at least one magnetic orientation unit (10) located downstream of the printing group (2) along a path of the substrate, which magnetic orientation unit (10) includes at least one magnetic-field-inducing device (12) adapted to orient the magnetic or magnetisable flakes contained in the ink or varnish vehicle applied on the substrate to induce an optically-variable effect in the ink or varnish vehicle. The printing press (100) further comprises a drying/curing unit (15) located along the path of the substrate and cooperating with the magnetic orientation unit (10), which drying/curing unit (15) is adapted to dry or cure the ink or varnish vehicle applied on the substrate following orientation of the magnetic or magnetisable flakes. The drying/curing unit (15) is mounted on a movable supporting structure (16) that is adapted to move the drying/curing unit (15) between a working position (WP), where the drying/curing unit (15) is cooperating with the magnetic orientation unit (10) and which is located proximate to the path of the substrate next to the magnetic orientation unit (10), and a retracted position (RP), where the drying/curing unit (15) is retracted away from the magnetic orientation unit (10) and from the path of the substrate.
Abstract:
Se describe un sistema de tinta de una prensa de impresión, en particular de una prensa de impresión offset o de tipografía, que comprende al menos un tintero (11, 12) con un rodillo de suministro de tinta (13, 14), un tren de rodillos de tinta (30) que comprende al menos un rodillo de entintado (31) que recibe tinta de al menos un tintero (11, 12), y al menos un rodillo vibrador (15, 16) interpuesto entre el rodillo de suministro de tinta (13, 14) y el rodillo de entintado (31), donde dicho rodillo vibrador (15, 16) oscila entre el rodillo de suministro de tinta (13, 14) y el rodillo de entintado (31) y transfiere intermitentemente tinta desde el rodillo de suministro de tinta (13, 14) al rodillo de entintado (31). Una circunferencia del rodillo vibrador (15, 16) presenta una estructura de transferencia de tinta (15a, 16a) que refleja un perfil de entintado deseado de una plancha de impresión a ser impresa por el sistema de tinta y está diseñada para modular una cantidad de tinta transferida por el rodillo vibrador (15, 16). La estructura de transferencia de tinta (15a, 16a) en la circunferencia del rodillo vibrador (15, 16) está subdividida, en una dirección circunferencial (y) del rodillo vibrador (15, 16), en un número entero (r) de partes de transferencia de tinta individuales (15b, 16b) que se repiten con un periodo circunferencial determinado (Δy) en la dirección circunferencial (y), reflejando cada parte de transferencia de tinta individual (15b, 16b) el perfil de entintado deseado de la plancha de impresión a ser entintada por el sistema de tinta. Una longitud de contacto (CL) sobre la cual el rodillo vibrador (15, 16) corre en contacto con el rodillo de suministro de tinta (13, 14) es equivalente al periodo circunferencial determinado (Δy) de las partes de transferencia de tinta individuales (15b, 16b) o a un múltiple entero del periodo circunferencial determinado (Δy) de las partes de transferencia de tinta individuales (15b, 16b).
Abstract:
There is described an inking apparatus of a printing press, in particular an offset or letterpress printing press, comprising at least one ink duct (11, 12) with an ink supply roller (13, 14), an ink roller train(30) comprising at least one inking roller (31) which receives ink from the at least one ink duct (11, 12), and at least one vibrator roller (15, 16) interposed between the ink supply roller (13, 4) and the inking roller (31), which vibrator roller (15, 16) is swung back and forth between the ink supply roller (13, 14) and the inking roller (31) and intermittently transfers ink from the ink supply roller (13, 14) to the inking roller (31). A circumference of the vibrator roller (15, 16) exhibits an ink-transfer 10 structure (15a, 16a) which reflects a desired inking profile of a printing plate to be inked by the inking apparatus and is designed to modulate a quantity of ink transferred by the vibrator roller (15, 16). The ink-transfer structure (15a, 16a) on the circumference of the vibrator roller (15, 16) is subdivided, in a circumferential direction (y) of the vibrator roller (15, 16), into an integer number 1 (r) of individual ink-transfer portions (15b, 16b) that are repeated with a determined circumferential period (?y) in the circumferential direction (y), each individual ink-transfer portion (15b, 16b) reflecting the desired inking profile of the printing plate to be inked by the inking apparatus. A contact length (CL) over which the vibrator roller (15, 16) runs in contact with the ink supply roller (13, 20 4) is equivalent to the determined circumferential period (?y) of the individual ink-transfer portions (15b, 16b) or to an integer multiple of the determined circumferential period (?y) of the individualink-transfer portions (15b, 16b).
Abstract:
L'invention concerne un appareil d'encrage d'une presse d'impression, en particulier d'une presse d'impression offset ou typographique, comprenant au moins un conduit d'encre (11, 12) doté d'un rouleau d'alimentation en encre (13, 14), un train (30) de rouleaux d'encre comprenant au moins un rouleau d'encrage (31) qui reçoit l'encre provenant du ou des conduits d'encre (11, 12), et au moins un rouleau vibrateur (15, 16) interposé entre le rouleau d'alimentation en encre (13, 4) et le rouleau d'encrage (31), ledit rouleau vibrateur (15, 16) basculant d'avant en arrière entre le rouleau d'alimentation en encre (13, 14) et le rouleau d'encrage (31) et transférant par intermittence de l'encre depuis le rouleau d'alimentation en encre (13, 14) sur le rouleau d'encrage (31). Une circonférence du rouleau vibrateur (15, 16) présente une structure (15a, 16a) de transfert d'encre 10 qui réfléchit un profil d'encrage souhaité d'une plaque d'impression devant être encrée par l'appareil d'encrage et est conçue pour moduler une quantité d'encre transférée par le rouleau vibrateur (15, 16). La structure de transfert d'encre (15a, 16a) sur la circonférence du rouleau vibrateur (15, 16) est subdivisée, dans une direction circonférentielle (y) du rouleau vibrateur (15, 16), en un nombre entier 1 (r) de parties de transfert d'encre individuelles (15b, 16b) qui sont répétées avec une période circonférentielle déterminée (?Y) dans la direction circonférentielle (y), chaque partie de transfert d'encre individuelle (15b, 16b) réfléchissant le profil d'encrage souhaité de la plaque d'impression devant être encrée par l'appareil d'encrage. Une longueur de contact (cl) sur laquelle le rouleau vibrateur (15, 16) s'étend en contact avec le rouleau d'alimentation en encre (13, 20 4) est équivalente à la période circonférentielle déterminée (?Y) des parties de transfert d'encre individuelles (15b, 16b) ou à un entier multiple de la période circonférentielle déterminée (?Y) des parties de transfert d'encre individuelles (15b, 16b).