Abstract:
Catalytic materials are used as a part of or in association with heat exchangers such as automotive radiators and air conditioning condensers. The catalytic material involves a metal substrate with a porous anodic oxide coating and metallic nodules which are electrodeposited in the pores and extend above the surface of the anodic oxide coating. The nodules are either formed of the catalytic metal or formed of other metals and then coated with the catalyst metal. The catalytic stock material is then formed into heat exchanger fins and mounted on the heat exchanger tubes. In the alternative, the catalytic stock material may be formed into a separate catalytic structure which is then mounted in an air flow stream and preferably in air-flow relationship to the heat exchanger.
Abstract:
A coated lithographic printing plate comprises a grained, anodized aluminum substrate and coating thereon comprising a diazo resin in admixture with particulate energy absorbing material that will absorb incident radiation and re-radiate it as radiation that will change the diazo resin coating which is imageable with a Crosfield Datrax 760 YAG laser plate maker producing incident radiation of 1/06 microns. The topography of the substrate and the particulate material in the coating trap and convert a substantial portion of the incident laser radiation which passes through the coating without substantially affecting same into radiation that will change the coating.
Abstract:
A lithographic printing plate system utilizing a composite plate having an aluminum printing member that can be recycled. An aluminum printing member has a light-sensitive coating thereon which forms the image area of the plate together with the aluminum member itself. A carrier plate supports the aluminum member. The carrier plate and the aluminum member are preferably releasably adhered together outside the image area of the plate, that is, along transverse and/or longitudinal edge positions adjacent the image area. The aluminum member is readily separated from the carrier plate for recycling after the printing run and the carrier plate can be reused or recycled.
Abstract:
On-press development of an imaged printing plate on a plate cylinder, in which ink is applied by an ink form roll, a blanket roll is in contact with the plate, a rubber roll is opposed to the blanket roll, and printable media passes between the blanket roll and the rubber roll. The plate comprises a substrate carrying an imaged coating, in which nonimage areas have cohesion C1, adhesion to the substrate A1, and adhesion to the applied ink A3 and image areas have cohesion C2, adhesion to the substrate A2, and adhesion to the applied ink A4. The ink has cohesion C3 and adhesion A5 to the blanket roll. The nonimage areas have adhesion A6 to the printable medium and the ink has adhesion A7 to the medium. The adhesions and cohesions are such that the blanket roll pulls the ink from the plate and the ink pulls the nonimage areas from the substrate as undissolved particles that are transferred by the blanket with the ink to the printable media.
Abstract:
A plate carries a solvent-soluble, radiation-polymerizable, oleophilic resin coating non-ionically adhered on a hydrophilic substrate, which can be imagewise exposed to polymerizing radiation and then directly processed by the application of disruptive mechanical forces such as compression or tension to remove the unimaged areas as undissolved particles, using pressurized water and brushing pre-press, or the tack of the ink on-press.
Abstract:
Excellent development of planographic printing plates can be achieved by exposing an imaged, negative working, photopolymerizable coating to a high pressure stream of essentially heated but otherwise untreated tap water, whereby the water completely removes only the less cohesive and adhesive (e.g., partially polymerized) regions to the substrate, thereby directly producing a printing plate having an image pattern of highly cohesive and adhesive, oleophilic regions of the coating and hydrophilic regions of the substrate. The coating removal mechanism appears to be due entirely to ablation. The process variables of spray pressure, spray volumetric flow rate, and water temperature can be traded off to achieve one or more targets for plate quality, energy conservation, production rate, and equipment availability.
Abstract:
A novel coating for lithographic printing plates can be imagewise exposed to radiation and then directly processed with only water to remove the non-exposed regions of the coating. The coating comprises a polymer, a monomer and/or oligomer, polymerization or cross link initiator, stabilizer, and dye or pigment, such that after imaging, the non-imaged resin areas are removable from the planar surface by penetration of water through the non-imaged coating without dissolution of the resin components of the coating, to form a lithographic printing plate with clearly defined image and non-image areas. The stabilizer is a solvent soluble, partially water soluble, non-polymerizable organic component that enables the coating to be removable by water in the non-cross linked areas.
Abstract:
Excellent development of planographic printing plates can be achieved by exposing an imaged, negative working, photopolymerizable coating to a high pressure stream of essentially untreated tap water, whereby the water completely removes only the less cohesive and adhesive (e.g., partially polymerized) regions to the substrate, thereby directly producing a printing plate having an image pattern of highly cohesive and adhesive, oleophilic regions of the coating and hydrophilic regions of the substrate. The coating removal mechanism appears to be due entirely to ablation. The high pressure stream is preferably delivered to the plate through at least one nozzle having a discharge pressure greater than about 200 psi. Each nozzle preferably has a spray pattern that impinges the plate over a substantially rectangular region of the plate, and the nozzle and plate translate relative to each other. The nozzle can reciprocate across the width of a longitudinally transported plate, thereby contacting successive regions of the plate in a rastering fashion.
Abstract:
Carbon dioxide emissions from a hydrocarbon combustor are discharged into a large aquatic body, which acts as a CO2 sink. The aquatic capture of the CO2 prevents that CO2 from entering the atmosphere. In addition, the captured CO2 participates in a photosynthesis process for growing a plant bloom which can be harvested, and converted into a fuel for reuse in the combustion unit. The combustion in fossil fueled power plants yields two products: the thermal energy for power, and waste CO2, which can be a raw material for growing an aquatic biomass. When the exhaust gases are discharged to the atmosphere, this raw material is lost, but by capturing this raw material in a highly efficient manner it can be converted to a usable form. An additional benefit of this efficient capture is that the adverse environmental effects of CO2 emissions into the atmosphere are avoided.
Abstract:
An imaged plate processor for covering the imaged coating with a turbulent flow of fresh developer solution for a short dwell time, and which preferably can be modified by the end user for development of a wide range of plates. The processor comprises a flat support surface for the plate, a plate feeder to the support surface, a plate transporter, and a nozzle array oriented to discharge developer solution onto a plate as the plate moves along the support surface. A source of fresh developer solution is connected to a pump for pressurizing the developer in the nozzle array in the range of about 5 to 250 psi, whereby fresh developer solution is directed from the nozzles as a pressurized flow pattern transversely onto the plate. A continual flow of fresh developer solution impinges on successive areas of the plate. Adjustable variables for accommodating a variety of plates include at least one of spray pressure and plate transport speed.