摘要:
Problems, which occur when printing is performed on the surface of a rotating disk using by using a print head arranged in the outer circumferential direction from the center of rotation, are resolved. Light emitting sections performs exposure in synchronism with rotational driving for rotating a medium, and pixels which are adjacent in the circumferential direction of rotation are exposed in a partially superimposed fashion by making the amount of movement in the circumferential direction along which the outermost circumference of the medium moves between exposures smaller than the width in the circumferential direction of the pixels formed by exposure. In a plurality of light emitting sections provided in an optical unit, the quantity of light for exposing a pixel on the inner circumferential side in the radial direction is set to be smaller than the quantity of light for exposing a pixel on the outer circumferential side in the radial direction for the respective exposure positions for the medium. Therefore, difference in the tonal shading caused by superposition is reduced by lowering the density created by each exposure in respect of the pixels on the inner circumferential side in the radial direction where there is a large overlap between exposures.
摘要:
Problems, which occur when printing is performed on the surface of a rotating disk using by using a print head arranged in the outer circumferential direction from the center of rotation, are resolved. Light emitting sections performs exposure in synchronism with rotational driving for rotating a medium, and pixels which are adjacent in the circumferential direction of rotation are exposed in a partially superimposed fashion by making the amount of movement in the circumferential direction along which the outermost circumference of the medium moves between exposures smaller than the width in the circumferential direction of the pixels formed by exposure. In a plurality of light emitting sections provided in an optical unit, the quantity of light for exposing a pixel on the inner circumferential side in the radial direction is set to be smaller than the quantity of light for exposing a pixel on the outer circumferential side in the radial direction for the respective exposure positions for the medium. Therefore, difference in the tonal shading caused by superposition is reduced by lowering the density created by each exposure in respect of the pixels on the inner circumferential side in the radial direction where there is a large overlap between exposures.
摘要:
When forming an image by developing a color development layer that reacts to a light, the image formation processes (color development, color erasure, and/or fixing) that can be performed simultaneously with information recording are performed in the same period as that of the information recording to reduce the time required for image formation. An image formation device that forms an image by developing a color development layer reacting to a light comprises a color development unit that develops colors by focusing a light on the color development layer, color erasure units that selectively erase the developed colors by focusing a light on the developed color development layer, and a fixing unit that fixes an image formed by the color erasure wherein the color development unit and/or the fixing unit performs processing in a period in which information is recorded on the recording medium on which the color development layer is provided.
摘要:
A ribbon cassette of which the type of ink ribbon accommodated in the ribbon cassette may be identified by detection switches arranged on the carriage of a thermal transfer printer, without using a plurality of types of ribbon cassette case which are different in shape. A ribbon cassette in which a simple construction is used to prevent sticking to each other of the ink ribbon and the guide roller immediately after printing. A ribbon cassette by which a stain on the recording sheet due to contact between the sheet and the ink ribbon at the time of printing operation may be prevented and the stability of running of the ink ribbon is improved. A thermal transfer printer in which: the stability of running of the ink ribbon may be improved; both hot peeling printing and cold peeling printing are possible in an excellent condition; and the consumption of the ink ribbon may be reduced.
摘要:
A type setting device for printers, comprising a drive motor, a drive gear mounted on a rotary shaft and rotated by the drive motor, a type wheel having a plurality of type elements and rotatably mounted on the rotary shaft, a first spring clutch interposed between the drive gear and the rotary shaft, a ratchet gear fixedly mounted on the rotary shaft and selectively stopped to control the first spring clutch, and a second spring clutch adapted to prevent the rotary shaft from being rotated reversely with respect to the rotation of the drive gear. The drive gear can thus be kept rotating at all times so that it is unnecessary that the motor be started and stopped every time a character is printed. This allows a high-speed type selection and high-speed printing.
摘要:
A printer having clutches for selectively transmitting the driving power from a single motor to a rotary shaft for rotating the type wheels and to a hammer drive shaft for driving a hammer is described. The clutches are under the control of a single controlling member so that the typing operation can be accomplished by the power furnished by a single motor having a shaft which need rotate continuously in one direction only.
摘要:
A printer provided with a plurality of printing type wheels, which have printing types at their periphery and can be selectively stopped at the printing position and a hammer disposed so as to be opposite to said printing type wheels, which can push recording paper against them, in which the hammer is made of a material of relatively hard synthetic resin and has a plurality of chevron shaped comb-like thrusting portions corresponding to the printing type wheels, each of the thrusting portions being constructed so as to include a hollow inside.
摘要:
A printer includes a drive claw associated with a printing wheel and having a projection engageable with axial, circumferential grooves of a drive shaft. The printing wheel is linked to and rotated by the drive shaft when the projection of the drive claw engages one of the grooves. However, during type selection, a selection claw engages teeth of a selection ratchet to stop the rotation of same, so that when an engagement means of the selection ratchet engages the drive claw, the projection of the drive claw disengages from the groove of the drive shaft, so as to detach the rotation transmitting relationship between the drive shaft and the printing wheel.
摘要:
A compact-size and light-weight serial printer system for a desk-top calculator or a small electronic device. It uses an endless printing belt adapted to be circulated and carrying a number of printing fonts. A carriage on which the hammer mechanism provided is slidably mounted and a rack shaft are positioned within the inner side of the endless printing belt. A reference position detection means is provided to generate trigger signals, for detecting the reference position on the endless printing belt, for initiating printing operations, and for selecting a desired printing font in conjunction with processings by the control section to calculate a movement distance of the endless printing belt. A single driving source is provided to drive each mechanism of the printer system. On the endless printing belt, the fonts which have lower frequency of usage are included in a single section, and those fonts which have higher frequency of usage are included in several sections.
摘要:
A serial printer having a carriage adapted to be shifted in the direction perpendicular to the direction of feed of a printing paper, hammer means opposing to the carriage across the thickness of the printing paper and adapted to be shifted as a unit with the carriage, a type wheel group slidable over a predetermined stroke within the carriage in the direction of shift of the carriage, and shift means for shifting the carriage and the type wheel group in the above-mentioned direction. The serial printer is small-sized and has a compact construction suitable for use in desk-top calculators or the like instruments.