JPH022069A - Recording apparatus - Google Patents

Abstract

PURPOSE:To miniaturize a photosensitive part and to dispense with the cleaning thereof by a method wherein a photosensitive film is irradiated with laser beam optically modulated by an image signal to form a latent image which is, in turn, developed to be transferred and fixed to recording paper in a developing/fixing part. CONSTITUTION:The laser beam emitted from a laser oscillation part 1 is modulated according to light and shade on the basis of an image signal in a beam modulation part 2 and outputted. A scanning image forming part 3 has a lens for projecting the laser beam while converging the same and converting the projected beam to parallel luminous flux, a magnifying device for magnifying the diameter of the luminous flux, a polyhedral mirror rotating at a constant speed for the sake of scanning and an image forming lens having an f-theta characteristic and forms an image on the surface of a photosensitive film 7 in a reverse image plane in a latent image forming part 4. The photosensitive film 7 passes through the latent image forming part 4 at the speed synchronous to the scanning speed of the scanning image forming part 3 and passes through a developing/fixing part 5 while recording paper 8 is superposed on the image forming surface of said film. The developing/fixing part 5 bonds the photosensitive surface of the photosensitive film 7 to the surface of the recording paper 8 and the whole is pressed by a hot roller 6 and the ink part not fixed of the photosensitive film 7 is welded to the recording paper 8 by the hot roller 6 to perform the transfer printing of an image.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a recording apparatus that prints and records images on recording paper using laser light.

[Conventional technology]

A conventional recording device of this type, as shown in the 21st EJ,
Laser light corresponding to the image signal is irradiated onto a photosensitive drum with an insulating layer surface to form a latent image, which is visualized as an image of heat-fusible colored particles (hereinafter referred to as toner), which is then transferred and fixed onto recording paper. Output.

FIG. 2 is a functional block diagram showing a conventional example. Second
In the figure, the recording device includes a laser oscillation section 1, a light modulation section 2. Scanning imaging section 3. Photosensitive drum 90. Latent image forming section 91. Developing section 92. Transfer section 93. It has an erasing section 94, a charging section 95, and a fixing section 96, and the recording paper 80 moves in pressure contact with the surface of a photosensitive drum 90 and a fixing roller 97 in a fixing section 96 in a transfer section 93.

The laser beam emitted from the laser oscillation unit 1 is modulated by the light modulation unit 2 according to an image signal, and passes through the scanning and imaging unit 3 that scans the surface of the photosensitive drum 900 and forms an image, and then the laser beam is transferred to the surface of the photosensitive drum 900 at the latent image forming unit 91. A latent image is formed on the insulating layer. After the surface insulating layer of the photosensitive drum 90 is uniformly charged by a charging section 95 by rotation, a latent image is formed in a latent image forming section 91 by a surface potential difference caused by a laser beam corresponding to an image signal and AC corona discharge.

The developing section 92 attaches toner according to the electric charge on the surface of the insulating layer of the photosensitive drum 90, and develops and visualizes the toner.

The transfer unit 93 presses the recording paper 80 onto the surface of the photosensitive drum 90 to which the toner has adhered, and transfers the visible toner image using a thermal transfer charger. The cleaning unit 94 removes the remaining charged particles so that the surface of the photosensitive drum 90 that has been transferred can be used again.

The recording paper 80 onto which the visible toner image has been thermally transferred is transferred to the fixing section 96.
The transfer surface is pressed by the fixing roller 97, and the transferred image is fixed on the recording paper 80.

This is a well-known technique of so-called electrophotographic processing.

[Problem to be solved by the invention]

As mentioned above, conventional recording devices use the insulating layer on the surface of the photosensitive drum to form latent images using highly accurate laser light. In addition to having at least a section, a cleaning section, and a charging section, the recording paper is ejected from the transfer section and then through the fixing section. There was a maintenance and operation problem in that cleaning and periodic replacement were essential to achieving clear images.

An object of the present invention is to provide a recording apparatus that solves the above problems by using a photosensitive film instead of a photosensitive drum.

[Means to solve the problem]

The recording device according to the present invention has a latent image forming section that forms a latent image by irradiating a photoreceptor film with a laser beam that is modulated by an image signal having brightness and darkness and is scanned and imaged using a polygon mirror and a condensing lens. and a developing and fixing section that transfers, develops and fixes the latent image formed on the photoreceptor film by pressing it onto a recording sheet overlaid on the photoreceptor film using a heat roller.

〔Example〕

Next, the recording apparatus of the present invention will be explained with reference to the drawings.

FIG. 1 is a block connection diagram showing one embodiment of the present invention. In FIG. 1, illustration of the control circuit is omitted.

In FIG. 1, the recording device has a laser oscillation unit 1 similar to the conventional one. Light modulation section 2. Scanning imaging section 3. and latent image forming section 4
The developing and fixing section 5 includes a latent image forming means using a laser beam, and a heat roller 6.

The laser light emitted from the laser oscillation section 1 is modulated by the light modulation section 2 according to an image signal according to brightness and output. The scanning and imaging unit 3 includes a lens that focuses and projects the laser beam and converts it into a parallel beam, a magnifier that expands the diameter of the beam, a polytheta mirror that rotates at a constant speed for scanning, and an image that has f-s characteristics. It has a lens and forms an image on the surface of the photoreceptor film 7 with a latent image forming section 4 in an inverted screen.

The photoreceptor film 7 passes through the latent image forming section 4 at a speed synchronized with the scanning speed of the scanning and imaging section 3, and then passes through the developing and fixing section 5 with the recording paper 8 superimposed on the image forming surface. Photoreceptor film 7
This is a polyester film coated with a thin layer of special ink that is fixed by laser light, and the portion exposed to the laser light in the latent image forming section 4 is fixed. The developing and fixing section 5 connects the photosensitive surface of the photoreceptor film 7 to the surface of the recording paper 8 and presses it with a heat roller 6.
The unfixed ink portion of the photoreceptor film 7 is welded to the recording paper 8 by the heat roller 6, and the image is transferred and printed.

The photoreceptor film 7 can be wound around a winding frame, so that it can be stored in a compact size, similar to the ink ribbon used in conventional thermal transfer type copying devices that perform thermal transfer by suppressing a thermal head.

In the above embodiment, the laser beam fixes the special ink on the photoreceptor film surface in the latent image forming section to create a latent image with opposite brightness and darkness, and the heat roller in the developing and fixing section transfers the areas not irradiated with the laser beam. has been illustrated and described, but the above description does not limit the present invention.

〔Effect of the invention〕

According to the recording apparatus of the present invention, a latent image is formed by irradiating the photoreceptor film with a laser beam modulated by an image signal, and then the latent image on the photoreceptor film is transferred and developed onto a recording paper in the development and fixing section. By using means for fixing and fixing, it is possible to reduce the size of the photoreceptor portion, eliminate the need for cleaning, and facilitate maintenance and operation.

[Brief explanation of the drawing]

FIG. 1 is a block connection diagram showing an embodiment of the recording apparatus of the present invention, and FIG. 2 is a block connection diagram showing an example of the conventional recording apparatus. DESCRIPTION OF SYMBOLS 1... Laser oscillation part, 2... Light modulation part, 3... Scanning imaging part, 4... Latent image forming part, 5... . . . Developing and fixing section, 6 . . . Heat roller 7 . . . Photoreceptor film, 2. . Agent Patent Attorney Shinki Uchihara

Claims (1)

[Claims] a latent image forming section that forms a latent image by irradiating a photoreceptor film with laser light that is modulated by an image signal having brightness and darkness and scans and forms an image using a polygon mirror, a condensing lens, etc.; and a developing and fixing section that transfers, develops and fixes the latent image formed on the photoreceptor film by pressing it onto the recording paper superimposed on the photoreceptor film using a heat roller.