JPS6051874A - Image forming device - Google Patents

Abstract

PURPOSE:To overlay a form through simple constitution by providing a means which superimpose a print formed through an optical printing means upon a pattern copied on a transparent form. CONSTITUTION:A toner image of a specific form pattern drawn on a hard-copy original is formed on a photosensitive drum 15 through SLA23 and transferred onto a form for an overhead projector by a transfer electrode 18 to obtain a positive image on the form. Then, this form is conveyed to a glass substrate 39 and the drum 15 is exposed through SLA23 while the form is also exposed to form a composite image as a toner image, which is transferred onto a form. Thus, the composite image of the specific form pattern and input image information is formed on the form to perform overlaying operation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an image forming apparatus that forms an image by combining a pattern such as a character or figure with image information from a computer or the like.

[Prior art and its problems]

Conventionally, in an electrophotographic printer that combines a copying device and a printer, a so-called form overlay is performed in which image information from a computer or the like is combined with a pattern such as a figure on a photoreceptor using an overlay film. An example of such a device is disclosed in Japanese Unexamined Patent Publication No. 55-52079.

As shown in FIG. 1, graphic information from the graphic input device 2 is applied onto the photosensitive tram 1 by the light image irradiation unit 3 to form an electrostatic latent image, and then the image is developed using r+1+ and l. The electrostatic latent image is made into a visualized toner image, and this toner image is then transferred onto the Orihalay film 5. In this way, graphical information is recorded on the overlay film 5'2, and an electrostatic latent image of this graphical information is formed on the photosensitive tram 6 by irradiation with the light source 9. On the photosensitive drum 6, there is already a corona charging section 7. An electrostatic latent image corresponding to image information from a computer or the like is formed by the optical image irradiation section 8.

The electrostatic latent image obtained by combining the image information and the graphic information becomes a toner image visualized by the developing section 10, and then the toner image of ζ is transferred onto the printing paper 11.

An image in which image information and graphic information are combined is formed on printing paper 11 via fixing section 12 . Here, residual toner on the surface of the photosensitive drum 6 is removed by a cleaner 13. Further, the toner image of graphic information recorded on the overlay film 5 is removed by a cleaner 14.

However, according to the method described in the above publication.

The apparatus has a disadvantage that it has a complicated structure and is very large in size, and the image forming process is also complicated and troublesome.

[Purpose of the invention]

In view of the above-mentioned conventional drawbacks, the present invention provides an image forming apparatus that is capable of producing form paper for form overlay and performing form overlay with a simple configuration, and further has ordinary electrophotographic copying function and printer function. The purpose is to

[Key points of the invention]

In order to achieve the above object, the present invention provides an image forming apparatus having an optical printing means in which dots are arranged and an imaging optical means. 11 between the optical printing means and the imaging optical means! The present invention is characterized in that it comprises a means for feeding, and a means for synthesizing the print formed by the optical printing means and the pattern copied on the transparent paper.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a block diagram of an image forming apparatus showing an embodiment of the present invention.

In FIG. 2, a 5-photosensitive tram 15 is installed so as to be rotatable in the direction of the arrow.
6. Developing device 17. Transfer pole 18° Separation pole 19. Elimination electrode 2
0. Each device of the cleaning device 21 is provided and has a configuration similar to that of a normal electrophotographic copying device.

A light source 22 for illuminating the original is provided above the photosensitive ram 15. A gradient index rod lens array (hereinafter referred to as SLA) 23 such as SELF-MEC Lens Array (trade name) is provided as an imaging optical means for irradiating light reflected from the original onto the photosensitive drum 15''. ing. moreover,
A light source 24 and a condenser lens 25 . LCD shank array 2
6 are provided for each. LCD shutter array 26
A plurality of shutters each having a size of approximately 0.1 angle are arranged in a row, and each shutter is turned on and off by applying a control signal. The image on the liquid crystal shutter array 26 is irradiated onto the photosensitive tollum 15 by the light source 24 through the 5LA 23.

The operation of the image forming apparatus configured as above will be explained below.

First, the production of form paper for form overlay will be explained.

A hard copy original on which a predetermined form pattern such as a character 1 figure is drawn is inserted from the arrow A section, and the inserted original is conveyed toward the glass substrate 39 by the feed rolls 38 and 27. Here, the light image of the document is exposed onto the photosensitive drum 15 through the 5LA 23 by irradiation with the light source 22.

The photosensitive drum 15 is uniformly charged to a predetermined polarity by a charging electrode 16 in advance, and by exposing the original, the photosensitive drum 15
An electrostatic latent image of the form pattern is formed thereon.

This electrostatic latent image becomes a toner image visualized by the developing device 17.

Next, the toner image formed on the photosensitive drum 15 is transferred at a transfer pole 18 onto a transparent form paper for an overhead projector (Ol-IP) fed from a cassette 32 at the same timing.

Subsequently, the form paper to which this toner image has been transferred is separated from the photosensitive drum 15 by a separation pole 19, conveyed on a general conveyance belt 33, and passed through a fixing roll 34. In this way, a predetermined form pattern is recorded as a positive image on the form paper. moreover.

The form paper on which this form pattern has been recorded is guided by a guide plate 35 and sent upward, is generally fed once by feed rolls 29 and 30, and is once stopped by a feed roll 27 to wait for one time.

On the other hand, the residual potential on the photosensitive drum 15 after transfer and the residual 1
- The toner is removed by the removing electrode 20 and the cleaning device 21, and the photosensitive drum 15 is uniformly charged again by the charging electrode 16.

Next, a case in which form overlay is performed will be explained.

The hard copy document on which the form pattern has been drawn, which has passed over the glass substrate 39, is ejected to a predetermined position by the feed roll 28, and the form paper on which the predetermined form pattern has been recorded, which has been waiting on the feed roll 27, is then fed. It is transported by rolls 27 toward a glass substrate 39 . At this point, the liquid crystal shutter array 26, which is an optical printing means, is activated to perform form overlay.

That is, each shutter of the liquid crystal shutter array 26 is turned on in response to a control signal from a computer or the like.

This control signal corresponds to image information such as variable character information to be printed. Therefore.

Each shack of the liquid crystal shutter array 26 is turned on or off according to the image information, and the light emitted from the light source 24 is sent to the condenser lens 2.
5, the light may or may not pass through each shack. The light that has passed through the liquid crystal shutter array 26 passes through the 5LA 23 and exposes the photosensitive drum 15. At this time, the form paper placed on the glass substrate 39 is also irradiated at the same time, so the form pattern such as figures recorded on the form paper and the image information such as variable character information are simultaneously displayed on the photosensitive drum 15. This composite electrostatic latent image is formed by exposure. This electrostatic latent image becomes a toner image visualized by the developing device 17.

Subsequently, the toner image formed on the photosensitive drum 15 is transferred onto the paper fed from the cassette 32 by the transfer pole 18 at the same timing. Further, the paper is separated from the photosensitive drum 15 by nine separation poles 19, and
Ill above! The image is fed and passes through the fixing roll 34. At this time, the guide plate 35 is rotating in the B direction about the fulcrum C, and the paper that has passed the fixing roll 34 is discharged onto the paper discharge 1-3 sheets by the paper discharge roll 36.

In addition, the charge and toner remaining on the photosensitive drum 15 after the transfer are processed by the removing electrode 20 and the cleaning device 21 in preparation for starting a new process.

In this way, a composite image of the predetermined form pattern and the input image information is formed on the paper]t.

Form overlay is performed.

In this embodiment, when producing a form paper for form oats\lay, a case was explained in which this form pattern is formed on a form paper from a normal 7'' T-tocoby original. The control signal corresponding to the form pattern information can be transmitted to the liquid crystal display without using the
The voltage may be applied to the ivy array 26 to activate it, and a form pattern may be recorded on the photosensitive drum 15 by light irradiation from the light source 24, and further this form pattern may be formed on the nail paper.

The case where form overlay is performed in the image forming apparatus of the present invention has been described above. However, in the same way as in the case of creating a form paper for form overlay, an electronic method for copying a positive image from an original with one energization is performed. It also functions as a photocopying device or as a printer for printing image information from a computer or the like.

〔Effect of the invention〕

As described above in detail, the image forming apparatus of the present invention has a simple configuration and can perform form overlay and form overlay.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional electrophotographic printer that performs form overlay, and FIG. 2 is a block diagram of an image forming apparatus showing an embodiment of the present invention. 1.6.15... Photosensitive drum 3.8... Light image irradiation section 5... Overlay film 9.22.24...
Light source 16... Charging electrode 17... Developing device 18.
・Transfer pole I9...Separation pole 20...Removal electrode 21...Cleaning device 23...SLA 25...Condensing lens 26...Liquid crystal shutter array 27.28, 29, 30.38. ...Feed roll 31.
32...Cassette 33...Il! delivery bell bell 1
34... Fixing roll 35... Guide' plate 36.
・・Paper output roll 37 ・・Paper output l・shi~ 39 ・・Glass substrate patent applicant Casio Computer Co., Ltd. Same as above Yoshiyuki Osuga, agent patent attorney for ID Co., Ltd. Figure 7

Claims (3)

[Claims] (1)) "In an image forming apparatus having a gutter-aligned optical printing means and an imaging optical means, a means for copying a pattern onto a transparent paper; and a means for copying a pattern onto a transparent paper; An image forming apparatus comprising: means for transmitting till image between optical image forming means; and means for synthesizing the print formed by the optical printing means and the pattern copied on the transparent paper. (2) The image forming apparatus according to claim 1, wherein the pattern is formed from a hard copy original. (3) The image forming apparatus according to claim 1, wherein the pattern is formed by the optical printing means.