JPS58118283A - Printer - Google Patents

Abstract

PURPOSE:To take out a paper without waiting time while preventing the fatigue of a photosensitive drum by driving only a thermal fixing device and a paper delivery roller when a printed paper is discharged in the discharge of papers from a nonimpact printer. CONSTITUTION:Latent images formed on a photosensitive drum 1 are all transferred onto a paper 5 and then, as soon as the paper stops immediately after the rear end position of the final paper passes a transfer means 6, a switching signal C is outputted by an operator or with an upper device to change over the operation from printing to discharging. The switching signal C is inputted into a thermal fixation driving circuit and a paper delivery roller drive circuit 12 in a drive control section 10 to drive a thermal fixing device 7 and a paper delivery roller 9 according to drive signals A and B. This enables immediate withdrawal of the printed paper without requiring waiting time for driving the recording process.

Description

[Detailed Description of the Invention] Technical Field of the Invention [0001] The present invention relates to a non-input type printing device such as an electrophotographic recording device, and more particularly to a method for discharging paper after printing is completed from the printing device. .

f3) Background of the Technology In recent years, non-print printing devices have been frequently used in various fields because of their ability to print at high speed and noiselessness.

0 Prior Art and Problems First, the general structure of an electrophotographic apparatus and its printing operation will be explained using FIG.

In the figure, the photosensitive drum 1 is uniformly charged by the charger 2, and then the surface potential of the photosensitive drum 10 is lowered at the part where the image information is exposed by the optical system 3, so that the image information by light is transferred to the electrostatic pattern. This electrostatic pattern is converted into O. This electrostatic pattern is developed into a visible pattern by supplying developer powder by the developing means 4.

On the other hand, the paper 5 is controlled to the same speed as the surface speed of the photosensitive drum 10, and transferred to the transfer means 6 by the paper conveyance roller 9.
transported to.

Next, the visible image on the photosensitive drum 1 is transferred by the transfer means 6.
The image is transferred to paper 5. Thereafter, the visible f#tit transferred to the paper 5 is heated and fixed by the heat fixing device 7 60. Also, the developer powder remaining on the photosensitive drum 1 after the transfer is 60.

It is completely removed by the cleaning brush 8.

Printing by an electrophotographic device is performed by sequentially repeating the steps described above.

However, the printing process of the electrophotographic device described above is
All the latent images formed on the photosensitive drum 1 are transferred to the paper 5 without stopping halfway, but if there is no information about the next page, the trailing edge position of the last page is transferred to the transfer means. It stops immediately after passing 6.

That is, the transfer surface of the paper 5 from the transfer means 6 to the heat fixing device 7 is in an unfixed state.

Therefore, the operator cannot take out the paper 5 in an unfixed state. For this reason, conventionally, the operator specifies the discharge operation of the unfixed paper 5d from the transfer means 6 to the heat fixing device 7 using a host device.

This discharge operation is 1 normal printing process 8! All the data at this time was recorded using Orspace and the paper was ejected. For this reason, a start-up time for the photosensitive drum 1' and any recording process is required.

Further, it has the disadvantage of causing fatigue to the photosensitive drum 1, developer, and the like.

(g) Object of the Invention In view of the above-mentioned drawbacks, an object of the present invention is to realize a printing apparatus that can take out printed matter immediately after the printing operation is completed without requiring waiting time.

(g) Structure of the invention An object of the present invention is a latent image forming medium in which reservoirs are formed.

A trench forming means for forming a latent image on a mosquito trap forming medium, a developing means for turning the latent image formed on the surface of the latent image forming medium into a visible scratch by supplying developer powder, and transferring the visible image to a recording medium. A printing device comprising a transfer means, a fixing means for fixing the visible image transferred onto the recording medium, and a medium transport means for transporting the recording medium from a medium supply section to a medium storage section. This is achieved by providing the printing apparatus with a control means for driving and controlling only the fixing means and the medium transport means.

(g) Example of implementation of issue 1 The present invention will be briefly described in detail with reference to the drawings.

FIG. 2 is an explanatory diagram of an embodiment of the printing apparatus according to the nine-print printing apparatus 111.

10t- is a drive control section which receives a control signal C from an operator or an upper position and outputs drive signals A and B'ft for driving and controlling the heat fixing device 7 and paper conveying roller 9. The same parts as in FIG. 1 are given the same numbers. FIG. 3 Ifi is a diagram showing details of the drive control section in FIG. 2. In the figure, reference numeral 11 denotes a heating fuser drive circuit which outputs a drive control signal A for driving the heating fuser 7 in response to an operator's operation or a switching signal C between printing and discharging operations output by the Samurai device; 12; teeth.

Similarly, depending on the operator's operation, a switching signal (from Ic) between printing and ejection operation is output from the host device K.

This is a paper transport roller drive circuit that outputs a drive control signal B to be applied to a motor (not shown) that drives the paper transport roller 9.

Next((:$The operation of the embodiment will be explained.

Printing by the electrophotographic printing apparatus is performed by sequentially repeating step 8 described using FIG. Here, in the present invention, after the latent image formed on the photosensitive drum 1 has been completely transferred, an electrolytic layer is applied to the sheet 5 in an unfixed state from the transfer means 6 to the heat fixing device 7.

Now, all the latent images formed on the photosensitive drum 1 are transferred to the paper 5.
The paper 5 is conveyed and the switching signal C for the ejection operation is output. The switching signal CFi is input to the drive control section 10, and is input to the heat fixing device drive circuit 11 and the paper conveyance roller drive circuit 12 in the drive control section 10.

The heat-fixing device drive circuit 1III'i outputs a drive signal A based on the input switching signal C, and drives the heat-fixing device 7.

Further, the paper transport roller drive circuit 12Fi motor is driven to drive the paper transport roller 9 to transport the paper 5. After transporting the paper 5Yr by a predetermined amount, the paper transport roller 9 is stopped and the paper 5 is transported. At this time.

The conveyance amount of the paper 5 is such that at least the acid at the rear end of the 50th page of the paper transferred to the transfer means 6 at the end of printing transfers the heat fixing device 7 to 2.
A conveyance length long enough to meet the needs of 1!1 is required.

As explained in J:a52, by driving only the rC9 heating fuser and the paper transport roller during the discharge operation of printed paper, printed paper can be immediately discharged without waiting time. Moreover, fatigue of the photosensitive drum 1 and the current acid agent is not caused.

(() Effects of the Invention According to the present invention, when the printed paper is ejected, the
To operate only the applicator and paper transport rollers.

Printed sheets can be taken out immediately without the need for waiting time for driving the recording process of the printing device.

Further, according to the present invention, since a process such as a photosensitive drum or a developing means is not used, a great effect 5r can be obtained in that the photosensitive drum 1 and the developer are not fatigued.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a schematic configuration of an electrophotographic apparatus; FIG. 2 is a diagram for explaining an embodiment of the printing apparatus according to the present invention; FIG. In the figure, 1 is a photosensitive drum, 2 is a charger, 3) is an optical system, 4 is a 3A image means, 5ri paper, 6 is a transfer means, 7t
8 is a cleaning plus, 9 is a paper transport roller, 10 is a drive control unit, 1iFi heating fuser drive circuit, 12 is a paper transport roller drive circuit, A and B are drive signals, and C is a switching signal. be. Agent: Hiroshi Matsuoka, Patent Attorney/″(・1. Uni;

Claims (1)

[Claims] A latent image forming medium on which an IIF is formed, a latent image forming means for forming a latent image on the latent image forming medium, and a latent image forming means for making the latent image formed on the surface of the latent image forming medium visible by supplying developer powder. A printing device comprising a means for transferring the visible gIt mark onto the recording medium, and a medium conveying means for conveying the image, the printing device comprising a control means for controlling only the electrodeposition means and the conveying means. A printing device characterized by having: