Abstract:
An improved ink cartridge dispensing valve system (10) is provided. The valve system (10) works on the same principle as a ball valve to automatically dispense ink when subjected to pressure. The valve system (10) includes an attachment post (18) and an attachable nozzle (12). The attachment post (18) is an integral part of the dispensing end of the ink cartridge and is recessed so that the cartridge can be easily shipped without damaging the attachment post (18). The attachable nozzle (12) fits over the attachment post (18) and opens or closes depending on whether pressure is placed on it by the ink in the cartridge.
Abstract:
The aim of the invention is to provide an inking device for a rotary printing machine in which the ink (10) can be easily changed. To this end, at least one ink reservoir (04, 06) can be coupled to the ink feeding bar (02) by way of quick couplers (18, 22, 36, 37), the ink being fed by pressurized air. The inventive ink feeding device requires no movable parts.
Abstract:
Described is a process which enables the three elements typical of rotogravure (ink, dilution and solvent) to be controlled unambiguously using only two parameters, concentration and viscosity. In a special embodiment, the process can also be used to control the two elements (ink and solvent ) typical of the printing of packaging materials (rotogravure and flexographic printing).
Abstract:
In order to apply colouring matter (4) to a printing pad (5) capable of depositing the colouring matter at the place where printing is desired, an inking device must be used which consists of one or more baths (2), each bath having a delivery slot (9) for the colouring matter and being concave in shape in the manner of a cylinder with a diameter which corresponds to a roller (3) capable of turning freely around its longitudinal axis. Colouring matter is thus applied to the surface, and the amount of colouring matter is determined by the distance between the roller and the printing pad, in that this distance is adjustable. By allowing the printing pad to pass while in contact with the roller, the roller is turned and colouring matter is deposited on the printing pad. In this manner, a thin and uniform layer of colouring matter is applied to the printing pad, thus enabling printing to be carried out with a hitherto-unknown small amount of colouring matter, which is particularly expedient when applying colouring matter, for example to acryl plates, for purposes of decoration.