Abrégé

An apparatus (1) for removing ink from an ink-covered side of a printed band (10) of flexible material, the apparatus (1) comprises - a band infeed (3); - a band outfeed (5); - a number of guide rollers (20) and at least one smear unit (30) defining a band path (4) from the band infeed (3) to the band outfeed (5), - at least one liquid application section (40) upstream to the at least one smear unit (30), the at least one liquid application section (40) comprising one or more liquid ap- plicators (41) for providing a liquid to an ink-covered side (12); - at least one scraper (50) downstream to the at least one smear unit (30), the least one scraper (50) adapted for engaging the ink-covered side (12) during use for removal of ink; wherein the at least one smear unit (30) comprising a smear surface (32) for smearing ink and liquid together, and the band path (4) is such that the band (10), during use, at least engages a circle arc (34) of the smear unit (30), the circle arc being at least 15 degrees, and wherein the smear surface (32) of the at least one smear unit (30) being configured, during use, to displace with a displacement velocity different than a band velocity.

Classes IPC  ?

• B41J 15/04 - Dispositifs de supports, d'alimentation ou de guidageMontages pour rouleaux ou axes
• B41J 29/17 - Dispositions pour le nettoyage

Abrégé

Aspects of the present disclosure are directed to a cleaning apparatus for cleaning printing plates. In some embodiments, the cleaning apparatus may comprise a laser arrangement including a pulsed laser for generating laser pulses with pulse duration in the picosecond range. The cleaning apparatus may further comprise laser guidance means for guiding the laser pulses onto a path on a printing plate. Other aspects of the present disclosure are directed to a method including the steps of generating laser pulses with pulse duration in the picosecond range and guiding the laser pulses onto a path on the printing plate.

Classes IPC  ?

• B41F 35/04 - Systèmes ou dispositifs de nettoyage des rouleaux d'encrage
• B08B 7/00 - Nettoyage par des procédés non prévus dans une seule autre sous-classe ou un seul groupe de la présente sous-classe
• B41F 5/24 - Rotatives typographiques pour impression flexographique
• B41F 35/00 - Systèmes ou dispositifs de nettoyage
• B41F 35/02 - Systèmes ou dispositifs de nettoyage des cylindres de clichés
• B23K 26/352 - Travail par rayon laser, p. ex. soudage, découpage ou perçage pour le traitement de surface
• B23K 26/0622 - Mise en forme du faisceau laser, p. ex. à l’aide de masques ou de foyers multiples par commande directe du faisceau laser par impulsions de mise en forme
• B23K 26/08 - Dispositifs comportant un mouvement relatif entre le faisceau laser et la pièce

Abrégé

An object of the invention is achieved by a cleaning apparatus for cleaning printing plates. The cleaning apparatus may comprise a laser arrangement, which may comprise a pulsed laser for generating laser pulses with pulse duration in the picosecond range. The cleaning apparatus may further comprise laser guidance means for guiding the laser pulses onto a path on a printing plate. The method may comprise one or more acts of generating laser pulses with pulse duration in the picosecond range and an act of guiding the laser pulses onto a path on the printing plate.

Classes IPC  ?

• B23K 26/08 - Dispositifs comportant un mouvement relatif entre le faisceau laser et la pièce
• B08B 7/00 - Nettoyage par des procédés non prévus dans une seule autre sous-classe ou un seul groupe de la présente sous-classe
• B41F 35/00 - Systèmes ou dispositifs de nettoyage
• B23K 26/352 - Travail par rayon laser, p. ex. soudage, découpage ou perçage pour le traitement de surface
• B23K 26/0622 - Mise en forme du faisceau laser, p. ex. à l’aide de masques ou de foyers multiples par commande directe du faisceau laser par impulsions de mise en forme

Abrégé

A method for cleaning of plate-shaped clichés (2) comprising the following method actions: - feeding plate-shaped clichés (2) into and through a first cleaning chamber (4); - flushing cleaning fluid to at least the print side of the plate-shaped cliché (2), when the latter is worked over by cleaning brushes (16); - feeding the plate-shaped clichés into and through another cleaning chamber (6) for subsequent flushing over and drying the plate-shaped clichés (2); - applying hot air from a hot air blower (26) to at least said print side of the plate-shaped clichés (2); comprising the further action - feeding the plate-shaped clichés (2) into and through a high-pressure cleaning chamber (8) situated between said first cleaning chamber (2) and said other cleaning chamber (6); - flushing in said high-pressure cleaning chamber (8) a high-pressure cleaning fluid at a range of 30 –120 bar to at least said print side of the plate-shaped clichés (2). By rather simple method and means it hereby become possible to obtain sufficient cleaning of plate-shaped clichés by which the printing side in advance has been laser cut with the desired printing pattern whereby sufficient removing of the resulting metal dust can be effectively flushed of and removed from the front side of the plate-shaped clichés by an effective and safe continuously cleaning process.

Classes IPC  ?

• B41F 35/00 - Systèmes ou dispositifs de nettoyage
• B41N 3/00 - Préparation en vue de l'emploi ou de la conservation des surfaces d'impression
• B08B 3/02 - Nettoyage par la force de jets ou de pulvérisations

Produits et services

Chemicals used in industry. Washing and cleaning machines and parts therefor, for use in the graphics industry.

Produits et services

Washing and cleaning machines for cleaning printing presses and removable printing press parts for use in the graphics industry; replacement parts for washing and cleaning machines, namely, washing and cleaning machines for cleaning printing presses and removable printing press parts for use in the graphics industry

Produits et services

Chemicals used in industry, including cleaning agents and preparations. Washing and cleaning machines and parts therefor, for use in the graphics industry. Treatment of materials.