Abstract: A printing head module including a body, a feeding roller assembly and a feeding sensor is provided. The body includes a material-supplying channel and a nozzle connected to the material-supplying channel. The feeding roller assembly is disposed at the material-supplying channel to transmit the modeling material to the nozzle. The feeding sensor is disposed at the feeding roller assembly to detect whether the feeding roller assembly rotates. The feeding sensor is coupled to a control unit, such that the control unit generates a notice according to a detection result of the feeding sensor.

Abstract: Systems and methods are provided for generating customized labels having electronic circuitry such as RFID circuitry. A printing system generates the label by selectively transfer printing elements (e.g., electronic circuitry, physical components, etc.) and donor layers (e.g., conductive materials, non-conductive materials, etc.) from a ribbon to a receiver (e.g., an item that receives the indicia). In addition, the printing system can program and test the label or indicia thereof, thereby providing the ability to customize each label according to predetermined criteria and to ensure that each label functions properly.

Abstract: A method of increasing coloring stability of a ribbon includes forming a dye receiving layer on a first region of the ribbon, forming a plurality of dye regions on a second region of the ribbon, receiving target image data, conveying a print medium, transferring the dye receiving layer of the ribbon onto the print medium when conveying the print medium, and transferring the plurality of dye regions of the ribbon onto the print medium according to the target image data after the dye receiving layer of the ribbon is printed onto the print medium.

Abstract: Systems and methods are provided for generating customized labels having electronic circuitry such as RFID circuitry. A printing system generates the label by selectively transfer printing elements (e.g., electronic circuitry, physical components, etc.) and donor layers (e.g., conductive materials, non-conductive materials, etc.) from a ribbon to a receiver (e.g., an item that receives the indicia). In addition, the printing system can program and test the label or indicia thereof, thereby providing the ability to customize each label according to predetermined criteria and to ensure that each label functions properly.

Abstract: A lettering tape is formed having an integrated layered configuration in which a base layer, an ink layer, and an adhesive layer exhibiting adhesive properties when heated are sequentially stacked. When the lettering tape is selectively heated by a thermal head to form an image thereon, the heated portion of the ink layer onto which an image has been formed is adhered to the heated portion of the adhesive layer and simultaneously, the heated portion of the adhesive layer exhibits self-adhesive properties, thereby enabling transfer to the target transfer body.

Abstract: A printer includes a ribbon supply end including a shaft, a ribbon retrieving end, and a ribbon. The two ends of the ribbon are installed on the ribbon supply end and the ribbon retrieving end respectively. The printer further includes a print head, a driving module for driving the ribbon supply end and the ribbon retrieving end so as to move the ribbon from the ribbon supply end to the ribbon retrieving end, a sensing module installed at one side of the ribbon supply end including a first contact sensor, and a second contact sensor installed between the first contact sensor and the ribbon supply end, and a control module for controlling the printer according to whether or not the second contact sensor can contact the shaft of the ribbon supply end when the first contact sensor contacts the ribbon on the ribbon supply end.

Abstract: Disclosed is a thermal printing assembly comprised of a first flexible section and a second flexible section joined to such first flexible section. The first section of such assembly is a thermally sensitive media that contains either a thermal transfer ribbon or a direct thermal sensitive substrate (such as thermal paper); the thermally sensitive media is adapted to change its concentration of ink upon the application of heat. The second section of such assembly is a flexible support with two sides, at least one of which has a smoothness of less than 50 Sheffield Units and contains particles with a Knoop hardness of less than about 800.

Abstract: A thermal printing assembly comprised of a first flexible section and a second flexible section joined to such first flexible section. The first section of such assembly is a thermally sensitive media that contains either a thermal transfer ribbon, a dye sublimation ribbon, or a direct thermal sensitive substrate (such as thermal paper); the thermally sensitive media is adapted to change its concentration of ink upon the application of heat. The second section of such assembly is a flexible support with two sides, at least one of which has a smoothness of less than 50 Sheffield Units and contains particles with a Knoop hardness of less than about 800 and the other side has an adhesive coating designed to remove dirt and debris from surfaces it contacts during use.

Abstract: A thermal printing assembly comprised of a first flexible section and a second flexible section joined to such first flexible section. The first section of such assembly is a thermally sensitive media that contains either a thermal transfer ribbon or a direct thermal sensitive substrate (such as thermal paper); the thermally sensitive media is adapted to change its concentration of ink upon the application of heat. The second section of such assembly is a flexible support with two sides, at least one of which has a smoothness of less than 50 Sheffield Units and contains particles with a Knoop hardness of less than about 800.

Abstract: A transfer foil for golf balls which achieves transfer printing at a temperature below 130° C. and provides a printed pattern having a superior durability. The transfer foil comprises a base film, and an ink layer carrying a pattern on one surface of the base film, the ink layer comprising a polyurethane resin having a hydroxyl value of less than 0.2 and a weight-average molecular weight of 20,000 to 60,000. The present invention also provides a golf ball, a method of printing a pattern, and a method of manufacturing a golf ball, which are all based on the use of the transfer foil.

Abstract: A multilayer pressure sensitive correction tape useful for masking handwritten and/or printed characters comprising a release liner, a masking layer and a pressure sensitive adhesive layer, wherein at least one of the layers is cured by radiation. In a preferred embodiment of the invention, the masking layer and pressure sensitive adhesive layer comprise formulations of reactive monomers or oligomers which are radiation-cured after the formulations are applied to the correction tape assembly. In a more preferred embodiment of the invention the masking layer and pressure sensitive adhesive layer formulations contain no volatile solvents when these formulations are applied to the correction tape assembly. The radiation-cured layers are essentially insoluble in organic solvents and water, and the radiation-cured layers exhibit improved film toughness and improved resistance to ink “bleed through”.

Abstract: A donor web having successive dye transfer areas and opposite longitudinal edge areas alongside each one of the dye transfer areas is subjected to a longitudinal tension when the donor web is advanced in a dye transfer printer, which can stretch the dye transfer areas more than the edge areas because the dye transfer areas, but not the edge areas, are heated at a print head in the printer. According to the invention, the edge areas are pre-weakened before the donor web is used in the printer to weaken a resistance of the edge areas, relative to the dye transfer areas, to being stretched so that the edge areas can be stretched substantially the same as the dye transfer areas when the donor web is used in the printer. The edge areas can be pre-weakened, for example, by perforating or piercing them to create holes in them, or by slitting or cutting them to create cuts in them.

Abstract: A gradation correction data used in correcting the gradation of the printed image is recorded on the leader film of the ink ribbon in a form of optically readable marks. Then the ink ribbon is set in a thermal printer, the marks are read out by an optical sensor to obtain the gradation correction data. Then, the gradation correction of the image data to be printed is carried out by referring to the correction data thus obtained prior to the actual printing of the image data.

Abstract: A ribbon for a thermal printer has a series of frames of different colors in a sequence that are correlated to the position of cards to be printed. The ribbon has indexing marks for each frame and also indicators for each repeating sequence of frames. The index marks are arranged in a line across the ribbon and the marks can be coded to individually indicate the color or other characteristic of the frame associated with the line of index mark. This information is received by a controller to control various printer functions.

Abstract: The present invention relates to a ribbon identifier that detects a color coded bank comprising multiple colored zones positioned on a ribbon core that fits in a printer. Each type of ribbon is associated with a specific and unique color coded band. The band may also be partly visible to the operator when loading the ribbon. When the color coded band is detected, the control program of the printer sets the parameters associated with that color coded band, ensuring proper printing.

Abstract: A thermal transfer sheet is equipped with an approval information of being approved as applicable to the predetermined printer. When the thermal transfer sheet is set on a printer and a determinator determines that the approval information is correct for the printer, the printer is interlocked with the determinator to actuate in the state where the thermal transfer sheet is set thereon. A front part of a thermal transfer sheet may be provided with a mark coded from the approval information. The mark may be formed of a material detectable with the light in a visible region or invisible region, a magnetic material, an electrically conductive material, a material responsive to microwave or a resonance circuit. The approval information may be recorded on an approval card, a resonance circuit or IC card which makes a pair with a thermal transfer sheet. In addition, a host system as a determinator may be connected to a facsimile as a printer via a communication circuit.

Abstract: A method for improving print quality of an identification card printing system is provided. In the method, heat is applied to a primary image portion of a thermal print ribbon corresponding to a primary image. Heat is also applied to a remainder portion of the thermal print ribbon defined as a portion of the thermal print ribbon that extends beyond the primary image portion to at least one lengthwise edge of the thermal print ribbon. In this manner, the thermal print ribbon is substantially uniformly heated across its width thereby reducing uneven stretching of the thermal print ribbon and improving the quality of the primary image that is ultimately transferred to a substrate. Also provided is an identification card printing system that is adapted to implement the above-described method.

Abstract: An ink ribbon adapted to be used for a sublimation type thermal transfer printer, said ink ribbon comprises a ribbon-shaped substrate, ink layers formed on a surface of said substrate and containing dyes, sensor marks formed on said surface of said substrate and a back coat layer formed on the other surface of said substrate, said sensor marks containing first carbon black with an average particle diameter of 30 nm or less and second carbon black with an average particle diameter of 270 nm or more. Such an ink ribbon significantly improve the reliability of detecting sensor marks and the shelf life.

Abstract: The object of the invention is to provide a multi-layer ink ribbon having a long printing life and a substantial freedom from causing unevenness of prints and a process for manufacturing the above ink ribbon. In accordance with the invention, a plurality of webs each constructed by using multifilament yarns for both warp and weft are superposed and fuse-cut to the width of a ribbon. At least one of the webs is compressed by hot pressing in advance and assembled with at least one web either not hot-pressed or hot-pressed to a degree of compression different from the first-mentioned hot-pressed web. The resulting assembly is fuse-cut under pressure to the width of a ribbon and the ribbon thus obtained is inked.

Abstract: This invention relates to an ink ribbon, a cartridge containing the ink ribbon and a method of discriminating a failure location from an ink ribbon base film when the failure occurs on the ink ribbon. The ink ribbon is a sublimation-type ink ribbon manufactured from a column of the plural columns into which the ink ribbon base film is cut. The ink ribbon has a recording portion for recording column information indicating a column out of the plural columns of the ink ribbon base film, from which the ink ribbon is manufactured. The cartridge contains the ink ribbon. When a failure occurs on the ink ribbon, the column including the failure is discriminated from the plural columns of the ink ribbon base film based upon the recorded column information of the ink ribbon.

Abstract: Disclosed are various embodiments of packaging for a roll of a web which is attached to a take-up core. The web is arranged so that it packages the roll together with the core, ready for shipment without the need for additional packaging. The web can include an ink ribbon and a leader connected to the ink ribbon.

Abstract: A printing apparatus is provided for printing an image using sequentially transferring inks for a plurality of colors, which are repeatedly arranged on an ink ribbon (R) with each having a predetermined length (l), to an elongated recording sheet (T) so that the transferred inks are overlapped. The printing apparatus includes a data input section (12) for inputting a plurality of data items representing images to be printed, a control section (11, S1) for calculating each of print lengths (Ln) of the images to be printed in response to the inputted plurality of data items, and a data storage section (14a, 14c) for storing the inputted plurality of data items. The control section (11, S3-S13) obtains a group of the data items whose total print lengths (Ln), calculated from the plurality of data items stored in the data storage section (14a, 14c), does not exceed the predetermined length (l).

Abstract: The invention concerns a thermal printing ribbon for an office printer and bearing a sequence of coloring areas (3-7) that serve to print a picture in at least one printing zone onto a printing support sheet of specified format. The formats of the consecutive coloring areas (3-7) that serve to print a printing zone are substantially sub-multiples of the format of the printing support sheet but significantly different one from another.The invention is appropriate for color printing by thermal transfer.

Abstract: In a thermo-tape unit (1) having a supply reel hub (2) and a supply roll (5) of thermo-tape (6) wound on the supply reel hub (2), the thermo-tape has at least one marking stripe configuration (14) at least in its leading area (8), which configuration comprises at least one marking stripe section (15, 16, 17) having a given section dimension (L1, L2, L3) in the longitudinal direction (L) of the thermo-tape (6), and at least one characteristic of the thermo-tape unit (1) is encoded by means of this section dimension (L1, L2, L3) of the marking stripe section (15, 16, 17).

Abstract: A new and improved thermal printing ink ribbon includes a heat-resistant base, a release layer disposed on the base including an ester wax and a rubber copolymer containing a specified aromatic monomer content and an ink layer disposed on the release layer by a solvent or hot-solvent process. The thermal printing ink ribbons exhibit satisfactory transferability even during high speed printing or after high temperature storage. The thermal printing ink ribbons are well suited for use in end face head-type printers.

Abstract: A gradation correction data used in correcting the gradation of the printed image is recorded on the leader film of the ink ribbon in a form of optically readable marks. Then the ink ribbon is set in a thermal printer, the marks are read out by an optical sensor to obtain the gradation correction data. Then, the gradation correction of the image data to be printed is carried out by referring to the correction data thus obtained prior to the actual printing of the image data.

Abstract: A compact color printer having a Y head (2), an M head (9), a C head (16), platen rollers (8, 15, 22) and a multi-time ink ribbon (23) wherein yellow ink (23y), magenta ink (23m) and cyan ink (23c) each having effective lengths B are sequentially on a substrate (23o) with a pitch P. When a line L1 of the printing paper (1) and an edge (23ya) of the yellow ink (23y) are positioned over a line position y1, the Y head (2) prints the color yellow; when a line L1 of the printing paper 1 and an edge (23ma) of the magenta ink (23m) are positioned over a line position y2, the M head (9) prints the color magenta; and when a line L1 of the printing paper (1) and an edge (23ca) of the cyan ink (23c) are positioned over a line position y3, the C head (16) prints the color cyan.

Abstract: A recording unit is formed by successively adhering layers of ink donor film of differing colors to each other. A bottom layer is adhered to an image receiving sheet, along a top edge of the recording unit. The image receiving sheet is longer than the ink donor films. In order to print a color image, the bottom ink donor film is layered onto the image receiving sheet, while the rest of the ink donor films are flipped away from the image receiving sheet. The layered film and sheet are fed from a print starting position through a thermal transfer printer that feeds and prints the film and sheet in a forward direction to a print termination position, and then feeds the film and used sheet in a reverse direction to the print starting position. The used film is removed, the next film layered onto the image receiving sheet, and the process is repeated until all the ink donor films have been used.

Abstract: A nonimpact printer accommodates ribbons of selected panel types such as y, m, c and black thermal transfer or dye diffusion, precoat, overcoat, and the like, or combinations thereof, on which ribbon identification data is recorded in terms of the number and disposition of such panels, optimum operating parameters and the like. Each ribbon also contains markers identifying sets of panels of different types, individual panels within such sets, and incremental positions within such panels, and the printer is designed to read such markers and record the movement of the ribbon therethrough. Means are also described for fabricating combination ribbons that employ more than one of the various nonimpact technologies. In addition, the printer records by several different means the ribbon positions at which a ribbon has been in use and provides means for moving the ribbon to unused portions thereof.

Abstract: A color thermal printer using an ink sheet having a set of three or four colorants coated or printed so as to correspond to a print area with sensor marks arranged at boundaries between the colorants. In the color thermal printer, a plurality of sensors are disposed within a print width of a thermal head and downstream from a heat line of the thermal head in an ink sheet forward direction by a predetermined distance. When the sensors have sensed the sensor marks, the ink sheet is rewound by the predetermined distance to cause the printing operation to be effected.

Abstract: A transfer foil for use in marking a golf ball has an ink layer on a base film. The ink layer is constructed by a urethane resin having a hydroxyl value of 0.2 to 15. The ink layer is transferred from the foil to the golf ball to form a marking by pressing the foil against the ball by means of a flat rubber pad. A two-part urethane resin composition is then spray coated onto the golf ball so as to cover the marking, dried and cured thereto. During the process, hydroxyl groups of the ink layer urethane resin react with isocyanate groups available from the urethane resin coating composition whereby the marking is durable.

Abstract: A printing apparatus employs a nearly linear conveying path P2 for printing paper P from a position confronting the platen roller 6 and thermal head 7 for composing the printing unit 3 to the paper discharge unit 2. The capstan roller 4, pinch roller 5, and discharge rollers 10, 10 are disposed opposedly to the conveying path P2, and at an intermediate position of the conveying path P2 intersects the conveying path P1 from the paper supply unit 1 to the printing unit 3. A paper supply port is disposed at the bottom of the paper cassette forming the paper supply unit 1, so that the conveying path P1 from the paper supply port to the printing unit 3 is shortened, and accordingly the paper conveying path is shortened. The printer construction simplified and downsized, while the precision of positioning of the printing paper and positioning of the printing head is enhanced, so that the printing quality may be improved.

Abstract: A nonimpact printer accommodates ribbons of selected panel types such as y, m, c and black thermal transfer or dye diffusion, precoat, overcoat, and the like, or combinations thereof, on which ribbon identification data is recorded in terms of the number and disposition of such panels, optimum operating parameters and the like. Each ribbon also contains markers identifying sets of panels of different types, individual panels within such sets, and incremental positions within such panels, and the printer is designed to read such markers and record the movement of the ribbon therethrough. Means are also described for fabricating combination ribbons that employ more than one of the various nonimpact technologies. In addition, the printer records by several different means the ribbon positions at which a ribbon has been in use and provides means for moving the ribbon to unused portions thereof.

Abstract: In a color thermal transfer recorder, L is set to a distance from a printing position to first and second sensors for detecting each of marks, q is set to a pitch between the marks, N is set to an integer equal to 2 or more, S is set to an arbitrary value from zero to the pitch q, and .delta. is set to an arbitrary value from 0 to 4 mm. The values L, q, N, S and .delta. are set such that the following formula L=N.times.q+S+.delta. is satisfied. The values L, q, N, S and .delta. may be set such that the following formula L=N.times.q+S-.delta. is satisfied. In this recorder, various kinds of marks are formed on an ink sheet and are detected by the first and second sensors so that a conveying operation of the ink sheet is controlled. In accordance with this structure of the recorder, the distance from the printing position to the first and second sensors is increased so that a degree of freedom in design of the recorder is increased.

Abstract: The provision is made of a firmware (F/W: ROM, RAM) which enables an accurate indexing of an ink sheet so that printing is not performed at the joint portion when an ink sheet having a joint is used. Therefore, an ink sheet having a joint can be used, decreasing running cost of the printer.

Abstract: The present invention provides an impact dot printer free from the missing of dots.An impact dot printer for recording dots on a recording medium comprises a printer wire having a printer end, a guide member for supporting the printing wire, an ink ribbon which contains an ink composition comprising a dye and a solvent and is positioned between the printing end of the printing wire and the recording medium. The printer also has a lubricant containg an oil component in the guide member for permitting the printing wire to be easily moved. The solubility of the solvent for the dye in the oil component of the lubricant is more than 400 g/100 g of oil.

Abstract: An ink ribbon for a color printer is provided which comprises a plurality of full color image strip portions each provided for printing a full color image on one sheet of printing paper during printing operation, each full color image strip portion including a plurality of ink color blocks applied with color inks different from each other, and marks, printed on blank portions in front of the ink color blocks so as to allow a printing operator to determine the color of the ink color blocks and the number of the used full color image strip sections. The marks may alternatively be provided on side areas of or blank portions in the ink color blocks respectively.

Abstract: Thermal transfer recording is improved by a recording method involving providing a thermal transfer material having a support and an ink layer disposed thereon and which in turn includes a binder and a colorant. The binder includes 45-70 wt. % of an ethylene-vinyl acetate copolymer, 25-50 wt. % of a wax, and 7-12 wt. % of a tackifier based on a total weight of the binder. The ink layer has a breakdown strength of 30-80 kg/cm.sup.2 at 25.degree. C. The method also involves contacting an ink layer side of the thermal transfer material with a recording medium, supplying a pattern of energy from a recording head to the thermal transfer material, and separating the thermal transfer material from the recording medium to leave a transferred image on the recording medium.

Abstract: A thermal transfer printer which can use both an ink sheet provided with a positioning mark to indicate the top position of a set of three color ink patches necessary for producing one image, and an ink sheet provided with no such positioning mark, without the need of switching an operation mode. The thermal transfer printer has an optical sensor which can equally detect a color change between 3rd and 1st color patches on the ink sheet provided with no positioning mark and a color change between a positioning mark and a 1st color patch on the ink sheet provided with the positioning mark. There is also disclosed an ink sheet cassette for use in the thermal transfer printer, the ink sheet cassette accommodating the ink sheet in which a positioning mark is coated with the same color(s) of ink as those for printing and information about the color sequence of the ink coated patches for printing is also recorded in the coated pattern of the positioning mark.

Abstract: A drive control method for a thermal transfer printer adapted to carry out printing by melting a thermofusible ink of an ink ribbon and transferring the molten ink onto a printing paper. The ink ribbon is formed with a blank portion coated with no ink, which blank portion is formed between an ink layer and a mark for indicating the ink layer. Under the condition where the thermal head is spaced from the printing paper, the ink ribbon is moved to bring the blank portion into opposition to the thermal head. At this position, the thermal head is pressed through the blank portion against the printing paper. Then, the thermal head is moved relative to the printing paper and the ink layer, and simultaneously the thermal head is heated to transfer the ink of the ink layer onto the printing paper.

Abstract: A thermal transfer printer which can use both an ink sheet provided with a positioning mark to indicate the top position of a set of three color ink patches necessary for producing one image, and an ink sheet provided with no such positioning mark, without the need of switching the operation mode. The thermal transfer printer has an optical sensor which can equally detect color change between 3rd and 1st color patches for the ink sheet provided with no positioning mark and color change between a positioning mark and 1st color patch for the ink sheet provided with the positioning mark. There is also disclosed an ink sheet cassette for use in the thermal transfer printer, the ink sheet cassette accommodating the ink sheet in which a positioning mark is coated with the same color(s) of ink as those for printing and information about the color sequence of the ink coated patches for printing is also recorded in the coated pattern of the positioning mark.

Abstract: Ink in an ink ribbon contains per 100 parts by weight of ink, 0.1-10 parts by weight of an adsorption-type corrosion suppressor. The adsorption-type corrosion suppressor may be one or more of, the following compounds: amines of the formula R--NH.sub.2, RR'--NH, RR'R"--N (where R, R' and RR" are alkyl groups), thiourea and its derivatives, benzotriazole and its derivatives, thiazole, thioamides and thiosemicarbazide. In another aspect of the invention, the ink contains an organic pigment as coloring material, said ink containing 5.0-10.0 parts by weight of graphite per 100 parts by weight of ink.

Abstract: A web, such as a ribbon in a printer, is provided with bar code markings arranged thereon to provide selected information, such as ribbon footage used and ribbon type. A printing fluid applied to the ribbon may be provided with particles having magnetic properties which are readable by a magnetic static read head wherein the presence of the magnetic printing fluid in the vicinity of magnetic gaps in such a head completes magnetic circuitry. Also, such printing fluid may be provided with fluorescent pigmentation, thereby affording optical sensing. In a printer embodiment, a mechanism is shown for synchronizing the output signals of the bar code sensors with a distance measuring device.

Abstract: An ink ribbon for a printing device comprises a substrate of a long thin web of a synthetic resin film having a solid ink coated on one surface thereof, the color of the substrate being the same as that of the solid ink. After the ink ribbon is used, the negative impressions left from the transfer of information to a printing sheet will be illegible.

Abstract: A stabilizing agent for use in electron donor-acceptor carbonless copying systems. The stabilizing agent is 2,2'-methylene-bis(4-methyl-6-t-butyl phenol). Systems in which the stabilizing agent is useful comprise a color-forming composition comprising at least one leuco dye which is fadeable or discolorable after development, a color-developing composition comprising an acidic coreactant material capable of reacting with the color-forming composition to provide colored products, and the stabilizing agent. The stabilizing agent prevents discoloration or fade of images produced by reaction of the color-forming composition with the color-developing composition.

Abstract: High speed printing machine incorporating a pressure-sensitive transfer ribbon of the squeeze-out or reusable type having a thin, flexible plastic film foundation having bonded thereto a microporous resinous ink layer containing pressure-exudable liquid ink which is adapted to be pressure-transferred to a copy sheet by means of a printing element which makes momentary impression contact with the ribbon while the ribbon is moving slowly across the path of said printing element. The invention comprises a high speed printing or impact machine which includes means for the application of a thin friction-reducing or slip-permitting film of liquid silicone oil to the rear or impact surface of the transfer ribbon in order to reduce the friction between the printing element and the moving transfer ribbon and to prevent grabbing of the film foundation and breakdown of the bond between the film foundation and the ink layer.

Abstract: The present invention relates to an ink formulation which may be coated on a flexible substratum to produce a typewriter ribbon or the like, wherein impressions made from such a ribbon are capable of adhesive removal shortly after being created on all conventional typing bonds and papers, but which impressions exhibit delayed alteration resistance whereby any attempt at correcting or removing the indicia by pressure sensitive adhesive means or altering the indicia by erasing will leave an obvious and permanent indication that a removal was attempted.

Abstract: A correctable print is obtained by using an easily sublimable ink. Said print is completely erased when heated at a temperature insufficient to cause the darkening of the paper, by means of a hot point, of hot air, or of radiant energy.

Abstract: An ink formulation which may be coated on a flexible substratum to produce a typewriter ribbon or the like, wherein the impression made from such a ribbon is capable of adhesive removal shortly after being created on all conventional typing papers, but which impression exhibits delayed alteration resistance whereby any attempt at correcting or removing the indicia by pressure sensitive adhesive means or, altering the indicia by erasing and the like, will leave an obvious and permanent indication that a removal was attempted.