KR20140084649A - Apparatus for printing image on a paper - Google Patents
Apparatus for printing image on a paper Download PDFInfo
- Publication number
- KR20140084649A KR20140084649A KR1020120154321A KR20120154321A KR20140084649A KR 20140084649 A KR20140084649 A KR 20140084649A KR 1020120154321 A KR1020120154321 A KR 1020120154321A KR 20120154321 A KR20120154321 A KR 20120154321A KR 20140084649 A KR20140084649 A KR 20140084649A
- Authority
- KR
- South Korea
- Prior art keywords
- roller
- printing paper
- paper
- stopper
- image forming
- Prior art date
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Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/65—Apparatus which relate to the handling of copy material
- G03G15/6555—Handling of sheet copy material taking place in a specific part of the copy material feeding path
- G03G15/6558—Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the transfer point
- G03G15/6567—Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the transfer point for deskewing or aligning
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
- G03G2215/00535—Stable handling of copy medium
- G03G2215/00556—Control of copy medium feeding
- G03G2215/00561—Aligning or deskewing
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Registering Or Overturning Sheets (AREA)
Abstract
Description
The present invention relates to a document output apparatus including a printer.
The document output device is a device coupled to a host device including a computer and outputs image data transmitted from the host device to a print medium including paper in accordance with a print signal applied from the host device. Such a document output apparatus includes a print medium supply unit for supplying a print medium, an image forming unit for forming an image on the print medium, and a discharge unit for discharging the print medium on which the image is formed.
In detail, the print medium supply unit includes a paper feed cassette on which a print medium, that is, print paper, is loaded, a friction pad provided on the upper surface of the paper feed cassette, and a pickup roller in contact with the friction pad. A front end portion of the printing paper is interposed between the friction pad and the pick-up roller, and the printing paper is transferred by the rotation of the pick-up roller.
In recent years, the demand for printing on various types of paper has been increasing. Therefore, in addition to ordinary paper, there is a very wide demand ranging from very thin paper such as thin paper or card stock paper to coated paper, label paper and oil paper .
Such a conventional document output apparatus has a skew problem in which the paper is turned to the left or right on the moving line when the printing paper is conveyed to the image forming unit. The skew phenomenon occurs due to various causes, which may occur when picking up a print sheet from a pick-up roller, or occurring when the sheet slips on one of the left and right conveying rollers in the process of being conveyed by the conveying roller. In this case, there arises a problem that the print contents can not be accurately printed on the printing paper.
Korean Unexamined Patent Publication No. 2011-0064076 or No. 2011-0040471 discloses a method of correcting a print image instead of correcting the inclination of a sheet upon detecting a skew. In the case of the 2008-0035899, when skew occurs, And adjusting the feeding force to solve the skew problem.
In a conventional general document output apparatus, when the skew occurs, the printing operation is stopped or the rotational speed of some of the rollers connected to a single axis is changed to solve the skew problem. However, these solutions do not fundamentally block the skew problem and still do not solve the print quality degradation problem.
The document output apparatus according to an embodiment of the present invention has been proposed in order to solve the problems described above. Even if the paper is fed in the process of being fed by the pick-up roller or the feed roller, skew correction is performed in front of the image forming section And then transferred to the image forming section.
According to another aspect of the present invention, there is provided a document output apparatus including: a paper feed cassette for supplying printing paper; An image forming unit for forming an image on a printing paper supplied from the paper feed cassette; A discharging unit for discharging the printing paper having passed through the image forming unit to the outside; A first roller portion for feeding the printing paper fed from the paper feed cassette; A second roller portion positioned in front of the first roller portion and guiding the printing paper conveyed from the first roller portion to the image forming portion; A stopper disposed between the first roller portion and the second roller portion to eliminate a skew state of the printing paper passing through the first roller portion; And a driving member connected to the stopper to allow the stopper to move up and down.
According to the document output apparatus according to the embodiment of the present invention configured as described above, even if a skew occurs in the sheet conveying process, the sheet is deskewed to the normal position before entering the image forming unit, There is an effect that can be printed on.
Also, there is an advantage that a jam prevention effect due to skew can be expected through a deskew process.
1 is a perspective view showing a configuration of a document output apparatus provided with a paper aligning unit according to an embodiment of the present invention;
2 is a view showing a print paper feed path of a document output apparatus according to an embodiment of the present invention.
3 is a perspective view showing a skew prevention structure according to an embodiment of the present invention;
4 is a diagram showing a state in which a skew prevention function is performed;
5 is a diagram showing a state after the skew prevention function is completed;
Hereinafter, a document output apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings.
1 is a perspective view showing a configuration of a document output apparatus according to an embodiment of the present invention.
1, a
In detail, the conveying roller unit includes a first pick-
The discharge roller unit includes a
The delivery unit includes a
The
The
The
The printing process of the
Hereinafter, the conveyance path of the printing paper loaded in the
2 is a view showing a print paper feed path of the document output apparatus according to the embodiment of the present invention.
2, the
In detail, on the front side of the first and second pick-
On the other hand, a
A
On the other hand, in the case of the
A path denoted by A in the drawing can be defined as a print path, and a path denoted by B can be defined as an inversion path. The print path A may include a paper feed path, a print path, and a paper path. The reversal path B reverses the printing paper printed on only one side so that the other side that is not printed is guided to the printing path in a state of facing the
Here, the
The rollers bundled with the dashed line M1 can receive the rotational force from the
3 is a perspective view illustrating a skew prevention structure according to an embodiment of the present invention.
Referring to FIG. 3, the skew prevention structure according to the embodiment of the present invention includes a conveying
In detail, the desk element does not necessarily have to be between the conveying
More specifically, the conveying
The desqueering member is a
Hereinafter, the operation of the skew prevention structure will be described in detail with reference to the drawings.
FIG. 4 is a diagram showing a state in which the skew prevention function is performed, and FIG. 5 is a diagram showing a state after the skew prevention function is completed.
4, the printing paper picked up by the pick-up
In detail, the printing paper picked up by the pick-up
Then, one end of the leading end of the printing paper first strikes the
First, when the number of rotations of the driving
Second, it is also possible to attach the sensor to one surface of the
In detail, a sensor capable of detecting the collision of the printing paper is attached to the left and right sides of the
As soon as the pair of sensors sense the collision of the printing paper, the
It is to be noted that the driving member for moving the
Claims (6)
An image forming unit for forming an image on a printing paper supplied from the paper feed cassette;
A discharging unit for discharging the printing paper having passed through the image forming unit to the outside;
A first roller portion for feeding the printing paper fed from the paper feed cassette;
A second roller portion positioned in front of the first roller portion and guiding the printing paper conveyed from the first roller portion to the image forming portion;
A stopper disposed between the first roller portion and the second roller portion to eliminate a skew state of the printing paper passing through the first roller portion; And
And a driving member connected to the stopper to allow the stopper to move up and down.
Wherein the stopper has a vertical surface on which the leading end of the printing paper contacts.
Wherein the driving member includes a solenoid.
When the paper feed is started, the stopper is in an elevated state,
Wherein the stopper is lowered when both ends of the leading end of the printing paper come into contact with the stopper.
And a sensor mounted on the vertical surface to detect contact of the printing paper.
The sensor is mounted on the left and right sides of the vertical plane, respectively,
Wherein a distance between the sensors is equal to or smaller than a width of the printing paper.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020120154321A KR20140084649A (en) | 2012-12-27 | 2012-12-27 | Apparatus for printing image on a paper |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020120154321A KR20140084649A (en) | 2012-12-27 | 2012-12-27 | Apparatus for printing image on a paper |
Publications (1)
Publication Number | Publication Date |
---|---|
KR20140084649A true KR20140084649A (en) | 2014-07-07 |
Family
ID=51734495
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020120154321A KR20140084649A (en) | 2012-12-27 | 2012-12-27 | Apparatus for printing image on a paper |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR20140084649A (en) |
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2012
- 2012-12-27 KR KR1020120154321A patent/KR20140084649A/en not_active Application Discontinuation
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WITN | Withdrawal due to no request for examination |