Bobst Bielefeld Gmbh

Bobst Group Italia S.p.a.

Rotomec S.p.a.

Valmet Rotomec S.p.a.

Renzo Melotti

Marco Olmo

Giacomo Mario Piero Truffi

Sergio Molino

A drum support assembly () for a printing machine is presented. It comprises a drum support body () having a bearing interface () for a drum, a lower guide () supporting the drum support body () at a lower end thereof, and an upper guide () supporting the drum support body () at an upper end thereof. Additionally, a pre-tensioning unit () is provided pre-tensioning the drum support body () against the lower guide () and/or the upper guide (). Furthermore, a printing machine is described, comprising a drum and a drum support assembly () as described above.

Drum support assembly for a printing machine and printing machine

A refrigeration unit () for a printing machine is presented. It comprises a dryer interface () connectable to a dryer unit () of the printing machine in a heat conductive manner and a print interface () connectable to a printing unit () of the printing machine in a heat conductive manner, wherein the refrigeration unit () is adapted to transfer heat () from the print interface () to the dryer interface (). Furthermore, a printing machine is described. It comprises a printing unit () adapted for printing on a web of carrier material, a dryer unit () being adapted for drying printed web of carrier material, and a refrigeration unit () as mentioned above.

Refrigeration unit for a printing machine and printing machine

A dryer unit (), especially an intracolor dryer unit, for a printing machine is presented. It comprises a web inlet edge () and a web outlet edge () being substantially parallel to one another and defining a drying area () therebetween. Additionally, an air inlet and a first air outlet () being connected to the air inlet in an air-ducting manner are provided. The first air outlet () is positioned adjacent to one of the web inlet edge () and the web outlet edge () and a middle axis of the first air outlet () is inclined towards the respective other of the web inlet edge () and the web outlet edge () with respect to the drying area (). Furthermore, a printing machine is described, comprising an impression drum, at least two ink application units and at least one dryer unit () as described above.

Dryer unit for a printing machine and printing machine

A ventilation and drying equipment for printing machines, including ovens operable to dry solvent on a printed support travelling through the ovens passages into and out of the ovens through which false or ambient air can enter the oven from the outside. At least one false air suppression device for which each printing unit covers at least one of the passages and which is maintained at a pressure lower than the air pressure inside the oven, to prevent false air from entering the oven through the at least one passage. Each false air suppression device is connected with a common recirculation duct in order to share the false air coming from each printing unit with the whole press.

Drying equipment with false air treatment for printing machines

Doctor blade assembly for rotogravure printing units, having a support structure for a doctor blade, a holding device of the support structure and a moving device for moving the holding device. The holding device includes a mounting suitable to fix either a chambered doctor blade or a non-chambered doctor blade to the moving device.

Interchangeable doctor blade assembly

A centralized device for the distribution and discharge of air causing the evaporation of a carrier in a number of user installations each having an intake channel and a discharge channel, comprising a single manifold for the reception, delivery and discharge of air-carrier mixture from and to the installations and a discharge fan connected to said manifold, and comprising for each installation: a device for air supply, connected to the single manifold and having a fresh air suction channel and an air supply channel, a fan connected to the air supply device, a heat exchanger connected to the fan and to the intake channel of the installation, a discharge device connected to the discharge channel of the installation and to the manifold and comprising a discharge channel, and a recirculation device comprising a recirculation channel connected to the air supply device and to the discharge device.

Centralized device for distributing and discharging air installations

A device in flexographic machines, for making an adjustment between an inner shaft and an extractable jacket, with the double purpose of supporting the jacket along the entire length of the shaft, and of increasing the stiffness of the jacket. The adapter comprises at each of its end portions a rigid ring, and these end rings are internally connected the one another by a first rigid cylindrical member which is thin and capable of expansion and is intended to rest against the shaft, and they are externally connected the one another by a second rigid cylindrical member intended to receive the jacket; expansion means are provided in order to secure said end rings to the shaft, and openings are provided in said second external member in order to allow blowing compressed air intended to make easier the insertion and the extraction of the jacket.

Device for adjusting extractable jackets in flexographic machines

A laser printing process using a rotary light sensitive roller electrically charged by points by a laser beam and intended for receiving onto the charged points particles of a toner powder and then transferring the same onto a band to be printed, includes a first step wherein the image to be printed is stored, by a first laser beam coming from a first laser source controlled by a computer, onto a rotary memory roller whose surface is covered with a layer of a material capable of assuming either an amorphous or a crystalline structure, this structure being convertible under the action of a laser beam, and this material showing a high difference in reflecting ability according to whether it assumes the one or the other of its structures, and includes a second step wherein the thus stored image is transferred, by the optical reflection of a second laser beam coming from a second laser source having in its whole a linear character, onto the light sensitive roller intended to receive the toner and to transfer the image onto the band to be printed.

Growing community of inventors

Sala Monferrato, Italy

Renzo Melotti