Abstract:
In a system and process for developing an imaged plate by contacting the plate with an alkaline developer, contained in a developer tank having a cover spaced over the developer level, the space between the developer level and cover is maintained at a concentration of carbon dioxide below ambient for a substantial portion of each day. Preferably, active carbon dioxide control is implemented in the space at least during idle periods, to maintain the concentration of carbon dioxide below about 100 ppm, preferably in the range of 0-10 ppm. The system has a first conduit with an extraction port in the space and a second conduit with a return port in the space. A canister or closed vessel of carbon dioxide scavenger material in the form of pellets or a strong alkaline solution, is fluidly connected between the conduits. An air handling device fluidly connected with the conduits and scavenger material, draws air out of the space, passes the drawn air through the canister or vessel, and delivers the scavenged air back into the space. A special cover having the ports, can be fit over the developer to enhance the sealing of the space from ambient air and thereby improve efficiency.
Abstract:
An archival medium, such as a compact disc, is made of a metal such as aluminum which is mechanically gained with particulate material under conditions that embed particulate material into the surface of the medium and visibly imageable by selective exposure to infrared laser radiation. A mechanically grained aluminum medium can also be anodically oxidized under conditions that do not impair the ability of the substrate to be laser imaged. The archival medium can be coated with opaque and transparent polymer coatings before or after imaging for security and/or protection. The coating can be a laser ablatable coating to provide a tamper-proof medium.
Abstract:
A substrate is coated with a first material which is soluble in a first solvent, whereupon a second material which is strongly adherent to the first material and insoluble in the first solvent is selectively applied by an ink jet printer. The substrate is then developed in the first solvent to establish the image. In a preferred embodiment the substrate is hydrophilic, the first material is a negative working photosensitive material, and the second material is a transparent adhesive, which permits curing the first material by exposure to actinic light after the development step. The adhesive is then removed. In an embodiment directed to a waterless plate the substrate includes a surface coating of silicone, and the first material is a primer which promotes adhesion of a second material in the form of an oleophilic adhesive which is selectively applied. The primer is then developed to expose the silicone on the non-image areas. The ink carrying image areas are formed by the adhesive, which in this embodiment is not removed.
Abstract:
The present invention relates to the formation and use of catalytic materials 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 web is punched with registration holes and imaged prior to cutting the web into individual imaged plates particularly for use as printing plates. The web with an imageable surface is serially punched, imaged and sheeted with the punched holes being utilized to assure registration and alignment in the imaging operation and in the subsequent use of the plates on a printing press. The punching and imaging may be performed at separate stations or at a single punching and imaging station. The web is preferably advanced under tension and tension and/or vacuum may be used to hold the web flat on the imaging platen.
Abstract:
The water-loving properties of an anodized aluminum lithographic surface are enhanced or restored by treatment with a solution containing a monomeric, organo-phosphonic acid chelating compound or salt thereof. Such treatment can take place following, during or in lieu of the treatment of anodized aluminum in web form with an alkali metal silicate in the process of manufacturing printing plates. Alternatively, the treatment can be carried out as a plate is developed and/or prepared for the press. In a third approach, an organo-phosphonic acid chelating compound can be incorporated into a fountain solution, ink or correction fluid.
Abstract:
Two tetrahedrons are fixed together at a common joint and provided with a seat fixed between faces of respective tetrahedrons and parallel to a support plane formed by two joints meeting the common joint at the common joint. For equilateral tetrahedrons which meet at an angle of 109.degree.30' between faces, plural seating can be provided by fixing three or more tetrahedrons together in a variety of configurations having a common support plane and seats parallel thereto.
Abstract:
The lithographic printing plate of the invention comprises a substrate having a hydrophilic surface, a coating on said surface of a light sensitive material (e.g., a water soluble diazo) and a top coating of discrete, oleophilic resin particles (e.g., an emulsion polymer), the resin particle coating being:(a) transparent to actinic light;(b) sufficiently permeable to allow a developer for the light sensitive material to penetrate through to the underlying light sensitive coating;(c) insoluble in said developer;(d) capable of being coalesced in situ after the plate is imaged and developed.
Abstract:
A security medium, secure articles made therefrom and methods of making same. Articles are disclosed which are resistant to counterfeiting and unauthorized alteration and which are suitable for use as currency, securities, security passes, identification cards, and analogous items now usually manufactured on paper. The novel articles comprise two synthetic material layers with a barrier layer therebetween and an image formed from sublimatable dye within at least one of the synthetic layers.