Typewriting machines – Typing by other than type-face or type-die – Electroconductive transfer
Reexamination Certificate
1999-03-08
2001-03-20
Eickholt, Eugene (Department: 2854)
Typewriting machines
Typing by other than type-face or type-die
Electroconductive transfer
C399S107000, C399S118000, C399S206000, C359S894000, C359S867000, C101S486000, C347S241000, C347S244000
Reexamination Certificate
active
06203222
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a printer for printing image information or the like, and more particularly, to a printer of an optical writing type which carries out a printing operation by irradiating light corresponding to image information or the like from light emitting elements onto printing paper of a photosensitive microcapsule type.
2. Description of the Related Art
A conventional printer head device is structured such that flashing light emitted according to image data by a plurality of light emitting diodes forming a print head formed on a substrate provided on a carriage guided by a carriage guide and reciprocated by a motor is, after the light diameter is decreased by pinholes of a given aperture, irradiated onto printing paper. The light emitting diodes are extremely small. A top portion that emits light and a connection portion formed on a substrate are connected by two bonding conductors. Since the distance from an aperture to the substrate is relatively large so as to prevent the aperture from contacting the light emitting diodes and to prevent the two bonding conductors from short circuiting, the emitted light leaks out from a pinhole of a non-corresponding position of the aperture to affect the image. Further, at the same time, since the distance from the light emitting diodes to the printing paper is large, there is also a problem in that the light energy received on the printing paper is small.
Further, in the conventional printer head device, there is a fear that, due to heat accompanying the flashing light emitted by the light emitting diodes, the temperature of the substrate and the aperture may rise above the melting point of plastic forming the carriage (about 130° C., for example) to melt or change the shape of a substrate supporting portion of the carriage leading to change in the substrate supporting state, and also, that heat irradiation from the aperture may cause color change or color development of the printing paper to degrade the print quality.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a printer head device with which light emitted from a plurality of light emitting elements mounted on a substrate forming a head does not leak out from a pinhole of a non-corresponding position of an aperture and the light energy received on printing paper can be made larger, and which can be sufficiently attached to the aperture and can cool the substrate and the aperture, and to provide a printer having the head device and an image processing system having the printer.
In order to solve the above problems, according to the present invention, a printer head device having light emitting elements for irradiating light onto printing paper to carry out printing is comprised of: an aperture member having concave portions corresponding to the arrangement of said light emitting elements; and pinholes substantially at the center of said respective concave portions for decreasing a diameter of the light emitted by said light emitting elements, in which said aperture member is arranged so that at least a part of said light emitting elements are housed therein without contacting said concave portions.
In the head device structured in this way, it is preferable that insulating black coat is formed in at least on the concave portions.
Further, in the respective structures mentioned above, the printer head device may be structured by providing the light emitting elements on a substrate, forming the aperture member of a metal having a high heat conductivity, and arranging the aperture member so as to be in contact with the substrate.
Further, in the respective structures mentioned above, the aperture member may have sandwichingly fixing portions for sandwichingly fixing a carriage.
The metal having a high heat conductivity is preferably copper or a copper alloy, and more preferably, phosphor bronze.
Further, the printer head device may be structured such that the substrate is formed of a metal having a high heat conductivity, and a heat radiating means for radiating-heat of the substrate is further provided.
Further, according to the present invention, a printer having a head device based on the respective structures mentioned above functions as follows: emitting light by the light emitting elements; decreasing the diameter of the light by the aperture portions; and irradiating the light onto a printing paper to produce an image on the printing paper.
Further, according to the present invention, an image processing system connecting the printer with an image processing apparatus is comprised of: transmitting/receiving image signals between the image processing apparatus and the printer to produce an image on the printing paper.
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Imai Saburo
Wakabayashi Kazuo
Adams & Wilks
Eickholt Eugene
Seiko Instruments Inc.
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