Abstract:
An automatic maintenance unit for a static print head used in a drop on demand inkjet printer is provided by a combination of a removable capping element to abut and cover ink ejection nozzles and a movable wiping element including a wiper to remove residual ink after removal of the capping element and before commencement of a print run, thereby avoiding the need for manual capping and decapping and cleaning of the print head and speeding up the printing cycle. The capping element is preferably mounted pivotally so that it can be swung between a capping position between print runs and a retracted position during print runs, and the wiper is preferably mounted on a frame to move outwards and upwards from a retracted position adopted during print runs, to a position above the nozzles and then downwards across the nozzles to clean them prior to a print run before returning to the retracted position.
Abstract:
Disclosed is a method of forming, on the surface of a substrate, a first layer which is suitable for activating a second solid-layer-forming chemical reaction thereon, the method comprising the steps of bringing into contact with the substrate a first liquid which forms a first solid layer thereon, the first liquid comprising an activator for the second solid-layer-forming chemical reaction, characterised in that the first liquid is selected so that the first solid layer adheres to the substrate and is permeable to a second liquid that comprises one or more reagents for the second solid-layer-forming chemical reaction. A second solid layer can then be formed on the substrate by bringing into contact with the first solid layer a second liquid comprising one or more reagents for the second solid-layer-forming reaction.
Abstract:
A surfactant selected from an acrylate-modified polydimethylsiloxane or a polyether-modified polydimethylsiloxanes is used, together with at least a colorant and a UV-curable organic, diluent, in a non-aqueous UV-curable ink composition suitable for ink jet printing. The use of this type of surfactant prevents the ink composition from causing the loss of more than 5 % of the nozzles in an ink jet print head and enables the composition to provide a hole to area ratio of no more than 0.05. The present ink compositions have particular application in the printing of packaging for foodstuffs.
Abstract:
A method for inkjet printing using an ink comprised of an acicular pigment and a solvent in an inkjet printer to print on a recording medium wherein the inkjet printer has an ink reservoir and a print head (12). The method comprises obtaining the ink comprised of the acicular pigment and the solvent wherein the ink has a first viscosity, filling the ink reservoir of the inkjet printer with the ink (30), flowing the ink from the ink reservoir to the print head of the inkjet printer, and jetting the ink from the print head of the inkjet printer and onto the recording medium (24), wherein the ink has a second viscosity upon exiting the print head. An ink formulation(s) comprised of an acicular pigment and a solvent for use in printing images with an inkjet printer. An ink cartridge and an inkjet printing system compatible with an ink comprised of an acicular pigment.
Abstract:
A system and method for depositing a substance onto a substrate comprises continuously transporting the substrate in a transport direction while traversing a deposition arrangement across the substrate to deposit the substance in a number of swathes. During such movement the positions of the deposition arrangement and the substrate are controlled with respect to one another such that the swathes complement one another to provide substantially uniform coverage of the substrate. As a result of the defined arrangement, improved substrate speeds can be achieved since there is no need for the substrate to stop at each traverse.
Abstract:
A system and method for depositing a substance onto a substrate comprises continuously transporting the substrate in a transport direction while traversing a deposition arrangement across the substrate to deposit the substance in a number of swathes. During such movement the positions of the deposition arrangement and the substrate are controlled with respect to one another such that the swathes complement one another to provide substantially uniform coverage of the substrate. As a result of the defined arrangement, improved substrate speeds can be achieved since there is no need for the substrate to stop at each traverse.
Abstract:
A method of performing a chemical reaction on a substrate comprises applying a reaction component in liquid form to a surface of a substrate, to form a liquid film thereon, while the substrate is conveyed along the path. The invention also provides apparatus for performing the method. The invention finds particular application in continuous electroless deposition of materials on a moving web of substrate material.
Abstract:
A method for electroless plating of metal on a laser-patterned substrate. A substrate is provided on which both a thermal imaging layer and catalytic layer are deposited. On exposure to a laser beam, sufficient levels of radiation are converted to heat in the thermal imaging layer to render the exposed regions of the adjacent catalytic layer inactive. The laser-patterned substrate is then exposed to a reaction solution which initiates the growth of a metal film on the unexposed regions of the catalytic layer.