Abstract:
New electro-sensitive compositions which can be used for a recording paper. The composition according to the invention contains in particular a Bi or Sb halide and a divalent metal halide chelating the first halide. The recording system can operate on about 10V with a very short pulse.
Abstract:
An article includes a colored electroplated metallic coating (6) comprising both nickel and zinc, on an underplate (4) of copper, brass, bright nickel or matt nickel, supported on a metallic or plastic substrate (2), the variation of color of the electroplated coating being independent of the identity of the cations (Ni , Zn , (NH4) , and thiocyanate anions), in the electrolyte, but rather depends exclusively on parameters selected from current density, time of the electroplating step and current quantity, provided that the current density at the cathode underplate is within the range of 0.01 to 0.5 A/dm .
Abstract:
A transfer tape (30) having a self-imaging liner (13) includes a first polyethylene coating or film layer (17) on a first face (14) of the self-imaging liner (13) with a first silicone coating (22) over the first polyethylene coating or film layer (17) and a pressure sensitive adhesive (24) on the first silicone coating (22). A release sheet is provided between the second face (15) of the self-contained carbonless sheet (11) and is covered with a second sprayed on polyethylene coating, or film layer (26), in turn covered by a second silicone coating (28). The transfer tape (30) may be in roll configuration with the adhesive (24) engaging the second silicone coating (28). The first silicone coating (22) may be a differential coating and applied at a weight of about 3-10 grams per square meter. The adhesive (24) may be a hot melt adhesive or adhesive from a pre-wound tape. A business form may be constructed of a face stock and the transfer tape (30), the transfer tape pressure sensitive adhesive (24) engaging the face stock, and labels may be die cut out of the business form. A CB coating (42) may also be provided on the second silicone coating (28), to overlie a CF coating (43). The method of making transfer tape (30) of the invention is simple yet effective.
Abstract:
A stabilized electrocoagulation printing ink comprises a liquid colloidal dispersion containing an electrolytically coagulable collloid, a dispersing medium, a soluble electrolyte, a coloring agent and a sequestring agent for complexing metal ions generated during electrocoagulation printing. The sequestring agent is present in an amount to prevent the metal ions from causing the colloid to undergo undesirable cross-linking, without adversely affecting electrocoagulation of the colloid.
Abstract:
A multi-copy form (10) which may be used with laser printers or electrostatic (xerographic) copies to make duplicate copies by passing the form only one time through the printers or copiers. The multi-copy form (10) has at least one thermally sensitive imaging sheet (12) sandwiched between two sheets (14, 16) of paper. The imaging sheet (12) may be releasably held to the two sheets (14, 16) of paper by a pressure-sensitive adhesive (18) which allows the sheets to be peeled apart. Toner (32) is fused to the top sheet (12) of paper by heat and pressure from top and bottom rollers (30) making images thereon, and heat transferred from the toner (32) to the underlying thermally sensitive imaging sheet (12) forms substantially duplicate images (38) on the imaging sheet (12). The thermally sensitive imaging sheet (12) has a thermal image layer applied to it which forms an image (38) when heat is transferred to the imaging sheet (12). The bottom sheet of paper (16) furnishes insulation against heat from the bottom roller (30). Different colored copies may be made by varying the dye formers and developers used for the thermal image layer. In another embodiment, the bottom sheet of paper may be eliminated.
Abstract:
A method and apparatus for reproducing an image and transferring same onto a substrate (22). A positive cylindrical electrode (30) is rotated about its longitudinal axis (64) at a substantially constant speed, the positive electrode having a passivated surface (34) defining a positive electrode active surface. A plurality of negative electrolytically inert electrodes (78) electrically insulated from one another are arranged in rectilinear alignment to define a series of corresponding negative electrode active surfaces disposed in a plane parallel to the longitudinal axis (64) of the positive electrode (30) and spaced from the positive electrode active surface (34) by a constant predetermined gag, the negative electrodes (78) being spaced from one another by a distance at least equal to the electrode gap to prevent edge corrosion of the negative electrodes (78). The positive electrode active surface (34) is coated with an olefinic substance and a metal oxide to form thereon micro-droplets of olefinic substance containing the metal oxide in an amount to prevent corrosion of the positive electrode (30). The electrode gap is filled with a colloidal dispersion containing an electrolytically coagulable colloid. Selected ones of the negative electrodes (78) are electrically energized to cause point-by-point selective coagulation and adherence of the colloid onto the olefin and metal oxide-coated positive electrode active surface, thereby forming a series of corresponding dots of colored, coagulated colloid representative of a desired image. The dots of colored, coagulated colloid are then contacted with a substrate (22) to cause transfer of the colored, coagulated colloid onto the substrate and thereby imprint the substrate with the image.
Abstract:
Disclosed are a method and an apparatus for electrocoagulation printing which are improved for rendering the printed ink water-fast. The ink being electrolytically coagulable is electrified, with use of a positive electrode and a negative electrode, and the ink between the positive electrode and the negative electrode is electrolytically coagulated so as to form a dot of coagulated ink for representing the image. The dot of coagulated ink is transferred onto the substrate to represent the image. The dot of coagulated ink is treated with a cross-linking agent to cause cross-link to a cross-linkable component which is contained in the coagulated ink, thereby rendering the dot of coagulated ink water-fast.
Abstract:
A polychromic image is reproduced and transferred onto a substrate (26) by (a) providing a single support member (20) having a continuous surface (32) moving at substantially constant speed along a predetermined path; (b) forming on the surface (32) a colored image with a printing ink containing a coloring agent; and (c) bringing a substrate (26) into contact with the colored image to cause transfer of the image from the surface (32) onto the substrate (26) and thereby imprint the substrate with the image. Steps (b) and (c) are repeated several times to define a corresponding number of printing stages arranged at predetermined locations along the aforesaid path and each using a coloring agent of different color, and to thereby produce several differently colored images which are transferred at respective transfer positions onto the substrate (26) in superimposed relation to provide the desired polychromic image.
Abstract:
A print-through form comprises a top (13) and a base layer (15) with the top layer (13) having a pattern of openings (23) in at least one region, the pattern of openings (23) having center-to-center distances substantially less than the size of characters or other elements to be printed. Ink applied to the region or regions with openings (23) forms characters on the top layer (13) by marking the area (25) between the openings (23), and on the base layer (15) in the same operation through the openings (23), marking the area (27) on the base layer (15) exposed by the openings (23) through the first layer (13). More than two copies in a single printing pass may be accomplished with forms of more than two layers, wherein the patterns of openings (23) expose area on all the intermediate layers and the base layer (15). In various embodiments forms may comprise sheets affixed by peelable adhesive, by folding larger sheets, and by edge gluing with removable strips made by perforation lines. Some forms are made to be fed through traction feeders from continuous webs.