JPH05124183A - Ink-jet recorder - Google Patents

Abstract

(57) [Summary] [Structure] An inkjet recording apparatus is a means for conveying recording paper, a means for detecting the presence or absence of recording paper at a predetermined position,
And the detecting means detects the absence of the recording paper at the predetermined position, and subsequently, when the detecting means detects the presence of the recording paper at the predetermined position when the conveying means carries out the conveying operation of the predetermined amount, the detecting means detects the presence of the recording paper. It is determined that the detection of the absence of the recording paper is detection of a hole provided in the recording paper, and means for prohibiting recording around the hole of the recording paper is provided. [Effect] By detecting the file hole with the paper sensor and automatically prohibiting the recording in the vicinity of the file hole, it is possible to prevent the recording apparatus from being stained with ink.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a serial type ink jet recording apparatus.

[0002]

2. Description of the Related Art With the widespread use of recording apparatuses, the paper used as a recording medium is changing from continuous paper such as roll paper or fan fault paper, which is exclusive for printers, to general cut paper. There are also various types of paper, some of which have a filing hole pre-drilled on the left edge of the paper.

[0003]

However, when such a paper with a file hole is used in an ink jet recording apparatus, the ejected ink passes through the hole portion and adheres to the apparatus main body, thus contaminating the apparatus. Occurs. To prevent this, it is necessary for the user to create recording data that avoids the hole portion or set the recording position of the recording device to the right end of the hole position, but it is complicated to create the recording data. However, there was a drawback that it could not record up to the left edge of the paper.

The present invention overcomes these drawbacks of the prior art,
It is an object of the present invention to provide an inkjet recording device that does not record at an unnecessary position with a simple configuration.

[0005]

In order to achieve the above-mentioned object, an ink jet recording apparatus according to the present invention has a means for conveying recording paper, a means for detecting the presence or absence of the recording paper at a predetermined position, and the detecting means. When the absence of the recording paper at the predetermined position is detected, and the detection means subsequently detects the presence of the recording paper at the predetermined position when the carrying means performs a predetermined amount of carrying operation, the detection is performed. It is characterized by further comprising means for determining that the previous detection of the absence of the recording paper by the means is detection of a hole provided in the recording paper, and prohibiting recording around the hole of the recording paper.

[0006]

According to the present invention, by detecting the file hole with the paper sensor and prohibiting the recording in the vicinity of the file hole, the vicinity of the file hole of the recording paper can be automatically recorded. It is possible to prevent the device from being stained with ink.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings.

FIG. 1 is a schematic diagram showing the structure of a conveying system of a recording apparatus embodying the present invention. Reference numeral 1 is a transport roller, 2 is a feed roller, 3 is a discharge roller, 4 is a paper sensor, 5 is recording paper, and 6 is a recording head.

The transport roller 1 is rotated by a stepping motor (not shown) to wind and transport the recording paper 5. The feeding roller 2 presses the recording paper 5 against the conveying roller 1. The discharge roller 3 discharges the recorded paper. The paper sensor 4 detects the presence or absence of the recording paper 5. The recording head 6 is provided with 64 ink jet nozzles arranged vertically, and the front end opening of each nozzle faces the recording paper 5.

FIG. 2 is a schematic diagram showing the structure of a recording apparatus embodying the present invention. 7 is a carriage, 8 is a guide shaft, 9
Is a file hole on the recording paper 5.

The carriage 7 carries a recording head 6, is supported by a guide shaft 8 and is reciprocally scanned in the horizontal direction. Since the horizontal position of the paper sensor 4 coincides with the file hole 9, the paper sensor 4 detects the file hole 9 as well as the presence or absence of the recording paper 5 itself.

FIG. 3 is a flow chart showing a control method of the recording apparatus embodying the present invention. In S1, the print data is developed as a bit image in the memory in the printing apparatus.
In S2, it is checked whether or not the mask flag is set, and if it is not set, the process proceeds to S5. The setting and resetting of the mask flag will be described with reference to FIG. If the mask flag is set, it is checked in S3 whether or not the print data position overlaps the mask position. If not, the process proceeds to S5. If they overlap, the print data of the portion overlapping the mask position is masked in S4. As a result, the recorded data at the file hole position is erased. Scan the carriage in S5
Record lines. Since the record data at the file hole position is erased in S4, ink is not ejected to the file hole position in S5. In S6, it is checked whether or not the paper discharge flag is set. If not set, the paper is fed in S7 and the process returns to S1.
The method of setting and resetting the paper discharge flag and the paper feeding method will be described in detail with reference to FIG. If the paper discharge flag is set in S6, it is checked in S8 whether the recording position has reached the paper discharge position, and if not reached, the process proceeds to S7. If it has reached, the paper is discharged in S9 and 1
Stop recording the page.

FIG. 4 is a flow chart showing the paper feeding method of the recording apparatus embodying the present invention. In S10, the paper feed motor is rotated one step to convey the recording paper. In S11, it is checked whether or not the paper-out flag is set, and if it is not set, the process proceeds to S12.
In S12, the state of the paper sensor is checked, and if there is paper, S1
Go to 4. If there is no paper, the no-paper flag is set in S13, and the position where the paper has run out is stored. In S14, it is checked whether the paper feed motor has been rotated by the number of steps required for paper feeding, and if the number of required steps has not been reached, the process returns to S10. If it has reached, the paper feeding is ended. S11
If the paper out flag is set at, the process proceeds to S15. The state of the paper sensor is checked in S15, and if there is no paper, the process proceeds to S16. In S16, it is checked whether or not the paper is conveyed by 8 mm or more from the position where the paper out flag is set. If the paper is being conveyed, the paper discharge flag is set in S17, the previously stored position where the paper is exhausted is newly stored as the paper discharge position, and the paper exhausted flag is reset. S
If there is paper in 15, the mask flag is set in S18, and the areas from the previously stored empty paper position to the current paper detection position are stored as mask positions.

By the above operation, when the paper-free distance on the recording paper is smaller than 8 mm, it is determined as a file hole and the position is stored as a mask position. The distance without paper is 8m.
When it is larger than m, it is possible to judge that there is no true paper and store that position as the paper discharge position.

FIG. 5 shows a state of the recording paper recorded by the above-described embodiment of the present invention. Recording paper 1 as shown
The recording area 102 on 01 can automatically open the vicinity of the file hole 103, and can prevent the recording apparatus from being stained with ink.

(Others) The present invention is provided with a means (for example, an electrothermal converter or a laser beam) for generating heat energy as energy used for ejecting ink, particularly in the ink jet recording system. The present invention provides excellent effects in a recording head and a recording apparatus of the type in which the thermal energy causes a change in ink state. This is because such a system can achieve high density recording and high definition recording.

With regard to its typical structure and principle, see, for example, US Pat. No. 4,723,129 and US Pat. No. 4,740.
What is done using the basic principles disclosed in 796 is preferred. This method is a so-called on-demand type,
It can be applied to any of the continuous type, but especially in the case of the on-demand type, it can be applied to the sheet holding the liquid (ink) or the electrothermal converter arranged corresponding to the liquid path. By applying at least one drive signal corresponding to the recorded information and giving a rapid temperature rise exceeding nucleate boiling, heat energy is generated in the electrothermal converter, and film boiling is caused on the heat acting surface of the recording head. Liquid (ink) corresponding to this drive signal as a result
This is effective because bubbles can be formed inside. Due to the growth and contraction of the bubbles, liquid (ink) is ejected through the ejection openings to form at least one droplet. It is more preferable to make this drive signal into a pulse shape, because the bubble growth and contraction are immediately and appropriately performed, so that the ejection of the liquid (ink) with excellent responsiveness can be achieved. As the pulse-shaped drive signal, those described in US Pat. Nos. 4,463,359 and 4,345,262 are suitable. If the conditions described in US Pat. No. 4,313,124 of the invention relating to the rate of temperature rise on the heat acting surface are adopted, more excellent recording can be performed.

As the constitution of the recording head, in addition to the combination constitution of the discharge port, the liquid passage, and the electrothermal converter as disclosed in the above-mentioned specifications (straight liquid passage or right-angled liquid passage). U.S. Pat. No. 4,558,333, U.S. Pat. No. 44, which discloses a configuration in which a heat acting portion is arranged in a bending region.
The configuration using the specification of No. 59600 is also included in the present invention. In addition, Japanese Unexamined Patent Publication No. 59-123670 discloses a configuration in which a common slit is used as a discharge portion of the electrothermal converter for a plurality of electrothermal converters, and an opening for absorbing a pressure wave of thermal energy is provided. The effect of the present invention is effective even if the configuration corresponding to the ejection portion is disclosed in Japanese Patent Laid-Open No. 59-138461. That is, according to the present invention, recording can be surely and efficiently performed regardless of the form of the recording head.

Further, the present invention can be effectively applied to a full line type recording head having a length corresponding to the maximum width of a recording medium which can be recorded by the recording apparatus. Such a recording head may have a configuration that satisfies the length by a combination of a plurality of recording heads or a configuration as one recording head integrally formed.

In addition, even in the case of the serial type as in the above example, the recording head fixed to the main body of the apparatus or the electrical connection to the main body of the apparatus and the ink from the main body of the apparatus by being mounted on the main body The present invention is also effective when a replaceable chip-type recording head that can be supplied or a cartridge-type recording head in which an ink tank is integrally provided in the recording head itself is used.

Further, as the constitution of the recording apparatus of the present invention, it is preferable to add an ejection recovery means of the recording head, a preliminary auxiliary means and the like because the effect of the present invention can be further stabilized. Specifically, heating is performed by using a capping means, a cleaning means, a pressure or suction means for the recording head, an electrothermal converter or a heating element other than this, or a combination thereof. Examples thereof include a preliminary heating unit for performing the discharge and a preliminary discharge unit for performing discharge different from the recording.

Regarding the type or number of recording heads to be mounted, for example, only one is provided corresponding to a single color ink, or a plurality of inks having different recording colors and densities are supported. A plurality of pieces may be provided. That is, for example, the recording mode of the recording apparatus is not limited to the recording mode of only the mainstream color such as black, but may be either integrally formed of the recording heads or a combination of a plurality of them. The present invention is also very effective for an apparatus provided with at least one of full-color recording modes by color mixing.

In addition, in the above-described embodiments of the present invention, the ink is described as a liquid, but an ink that solidifies at room temperature or lower and that softens or liquefies at room temperature may be used. Or, in the inkjet method, it is common to adjust the temperature of the ink itself within the range of 30 ° C. or higher and 70 ° C. or lower to control the temperature so that the viscosity of the ink is within the stable ejection range. At times, a liquid ink may be used. In addition, the temperature rise due to thermal energy is positively prevented by using it as the energy for changing the state of the ink from the solid state to the liquid state, or in order to prevent the evaporation of the ink, it is solidified and heated in a standing state. You may use the ink liquefied by. In any case, by applying heat energy such as ink that is liquefied by applying heat energy according to the recording signal and liquid ink is ejected, or that begins to solidify when it reaches the recording medium. The present invention can be applied to the case where an ink having a property of being liquefied for the first time is used. In this case, the ink is
JP 54-56847 A or JP 60-7.
As described in Japanese Patent No. 1260, it may be configured to face the electrothermal converter in a state of being held as a liquid or a solid in the concave portion or the through hole of the porous sheet. In the present invention, the most effective one for each of the above-mentioned inks is to execute the above-mentioned film boiling method.

In addition, as the form of the ink jet recording apparatus of the present invention, besides the one used as an image output terminal of an information processing apparatus such as a computer, a copying apparatus combined with a reader or the like, and a facsimile apparatus having a transmission / reception function It may be a form or the like.

[0025]

As described above, according to the present invention, it is possible to prevent the recording apparatus from being contaminated with ink by detecting the file hole with the paper sensor and automatically prohibiting the recording in the vicinity of the file hole. .. Since the file hole detection sensor also serves as the conventional paper sensor, the cost does not increase.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a configuration of a carrying system in an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a configuration of an embodiment of a recording apparatus according to the present invention.

FIG. 3 is a flowchart showing a control method of the recording apparatus.

FIG. 4 is a flowchart showing a paper feeding method.

FIG. 5 is a diagram showing a recording area in a recording apparatus embodying the present invention.

[Explanation of symbols]

 1 Transport roller 4 Paper sensor 5 Recording paper 6 Recording head 9 File hole

Claims (2)

[Claims] 1. A means for conveying a recording paper, a means for detecting the presence or absence of the recording paper at a predetermined position, and the detecting means for detecting the absence of the recording paper at the predetermined position, and subsequently the conveying means. When the detecting means detects the presence of the recording paper at the predetermined position when performing the conveying operation of the predetermined amount, the detection of the absence of the previous recording paper by the detecting means detects the presence of the hole provided in the recording paper. An ink jet recording apparatus, characterized in that it is provided with means for judging that the detection is made and prohibiting recording around the hole of the recording paper. 2. The ink jet recording apparatus according to claim 1, wherein the recording is performed by an ink jet recording head which uses thermal energy to generate bubbles in the ink and ejects the ink based on the generation of the bubbles. ..