摘要:
The invention relates to a pressure-activatible correcting tape, which has a conventional carrier and a lift-off layer for removing typed or printed type images, the lift-off layer containing a wax, a binder and optionally further additives. This correcting tape is characterized in that the lift-off layer contains approximately 5 to 35% by weight of butyl rubber, approximately 30 to 90% by weight of wax and approximately 0.1 to 5% by weight of a dispersant having a dispersing action in an aqueous medium for the aforementioned substances. The lift-off layer can be produced by means of an aqueous coating liquid, which is environmentally advantageous compared with organic dispersants. This correcting tape can be used without restriction and independently of the type of typewriter.
摘要:
Ribbon (22) in thermal printing has an outer layer which adheres to printed characters at intermediate temperatures, lower than printing temperatures. The printhead (7) has a column of electrodes (9) which sweep across the character area. Lift-off is accomplished by the pattern control (40) controlling the current source (38) to provide rapid, square wave pulses displaced in phase 180 degrees at adjoining electrodes (9). The high level of the pulses is about that of the level at printing, and the pulses are sufficiently rapid so that their net effect is to raise the outer layer ribbon (22) to the intermediate temperature. At areas corresponding to underlines of characters, duration of the up period is longer. Good, long term reliability is achieved by the significant erase level being very close to the print level.
摘要:
A thermal ribbon particularly suited to be used once for printing at one temperature and for lift-off correction at a lower temperature. The bottom, resistive layer is a blend of an aliphatic polyurethane and a urethane acrylic copolymer with conductive carbon black. The next layer is 1000 angstroms thick aluminum. The next layer is the release layer, of an ethylene organic acid copolymer, a low-melting material. The top layer is an ink layer containing ethylene vinyl acetate and polyethyacrylate. The resistive layer has a light dusting of graphite. Low print currents for both printing and lift-off correction are achieved.
摘要:
A split correction-imaging ribbon comprising a longitudinal strip of film-base adhesive correction composition and an adjacent longitudinal strip of film-base pressure-transferable imaging composition. The two strips are overlapped and bonded together by means of the adhesive correction composition to provide a unitary element such as a typewriter ribbon which is bifunctional, i.e. capable of producing typed images on a copy sheet and also capable of removing such typed images as may be erroneous.
摘要:
A typewriter correction tape adapted to lift off an erroneous typewritten character from the paper on which it was typed including an impact compressible material coated on a substrate film, and method of manufacture thereof.
摘要:
A printer capable of completely erasing printed characters while reducing noise which may be generated during the erasure. After an erase key is manipulated and the holder member is moved to its erase position, a motor is energized and driven at a motor current level of I1 and I2 from a time t0 when the erasing operation starts. A print hammer strikes onto a printing paper through a type and a correction ribbon at a hammer speed of V1. Thereafter, motor current level of I3 is applied to the motor, so that the print hammer presses the printing paper at a contacting pressure of P1. In the subsequent erasure operation, the motor current level of I11 and I12, which are smaller than I1 and I2 in the first erasure are applied to the motor. Thus, the hammer speed when striking onto the printing paper by the hammer is lower than V1. Accordingly, contacting pressure of the print hammer onto the printing paper becomes P11, which is smaller than P1 of the first erasure.
摘要:
A thermal transfer recording apparatus capable of image recording and image correction using a self-correction ribbon. In image recording the ribbon is lifted off from the recording sheet immediately after heating, while in correction the ribbon is lifted off with a delay from the sheet so that the ribbon develops sufficient adhesive force by cooling. The delay is caused by a lever member or the like, movable between a protruding position for correction and a retracted position for recording, and provided on an ink ribbon cassette or on the recording apparatus itself.
摘要:
A formula and process to manufacture a lift-off correctable film ribbon in which the transfer layer is cured by an electron beam. The radiation curing eliminates solvents and their associated handling and pollution problems. The polymerizable ingredients are acrylic acrylate and N-vinyl-2-pyrrolidone. The formula also includes powdered polyperfluoroethylene, mineral oil, and carbon black.
摘要:
Low tack pressure sensitive compositions containing polyethylene, a tackifier, an isobutylene polymer, a copolymer of ethylene and/or propylene and a monoethylenically unsaturated ester and a carboxylic acid and/or ester thereof and use thereof to remove erroneously typed images from a substrate.
摘要:
An apparatus for manufacturing correction material comprising a first coating roller for applying a base coating on strip material, a first subatmospheric pressure drying chamber, a first treatment chamber for impinging heated air at atmospheric pressure onto the strip material received from the first drying chamber to harden the base coating, a second coating roller for applying a release coating over the base coating on the strip material, a second subatmospheric pressure drying chamber for vacuum drying the release coating after the release coating has penetrated the base coating and a second treatment chamber for impinging heated air at atmospheric pressure onto the strip material received from said second drying chamber.