JPH05330186A - Copy slip printing device in wire dot printer - Google Patents

Abstract

PURPOSE:To provide a copy slip printing system in a wire dot printer capable of rapidly performing the copy reinforcing printing only of the necessary pattern in one line without lowering printing quantity. CONSTITUTION:The printing of the specific regions Q1, Q2 in one line of a copy slip 1 is performed two or more times in such a state that a dot forming position is made same to perform the copy reinforcing printing only of the necessary pattern in one line. When printing on and after the second time of the specific regions Q1, Q2 is performed, a printing head passes through regions R1, R2 other than the specific regions at a skipping speed higher than a usual printing speed Vo. By this constitution, copy reinforcing printing can be rapidly performed as compared with such a case that the printing head reciprocally moves within one line at the same usual printing speed Vo.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing method for printing on a printing medium, particularly a copy form, by a serial type wire dot printer.

[0002]

2. Description of the Related Art In a serial type wire dot printer, a print head provided with a plurality of wires moves relative to a print medium, and the plurality of wires press the print medium in synchronization with the movement. Printing is performed by forming a plurality of dots by. The serial-type wire dot printer that performs printing in this way can perform copying on each sheet of a copy form formed by stacking a plurality of sheets such as pressure-sensitive paper and back carbon paper.

FIG. 2 shows four sheets of paper 1a, such as pressure-sensitive paper and back carbon paper, printed by a serial type wire dot printer.
FIG. 3 is a state explanatory view when printing is performed on the copy form 1 formed by stacking 1d, and shows a state where one wire 2 presses the copy form 1 via the ink ribbon 3.

As shown in the figure, when the wire 2 gives an impact to the copy form 1, dots are formed on the front surface of the paper 1a by pressure contact with the ink ribbon 3, and on the second and subsequent papers 1b to 1d. , Dots are formed by copying by the impact of the wire 2. Actually, a plurality of dots are formed by the plurality of wires 2, and a character or the like is printed on each sheet 1a to 1d of the copy form 1 by the set of the dots.

By the way, when the wire 2 impacts the copy form 1 for printing in this way, the air existing between the papers 1a to 1d of the copy form 1 and the papers 1a to 1d.
Since the wire itself absorbs the impact of the wire 2, the pressure distribution due to the impact of the wire 2 spreads wider toward the lower sheet.
As a result, with respect to the second and subsequent sheets of paper 1b to 1d, the applied pressure value becomes small, a sufficient copy density cannot be obtained, and characters or the like due to the copy become difficult to read.

Therefore, conventionally, in order to obtain a sufficient copy density in printing on the copy form 1, the same pattern at the same position is printed a plurality of times with the same dot forming position. .. For example, when printing at the same position is performed twice, as shown in the state explanatory view of FIG. 3, the air between the sheets of paper 1a to 1d is removed by the impact of the wire 2 in the first printing. Since the papers 1a to 1d themselves are also compressed, the spread of the pressure distribution due to the impact of the wire 2 becomes small at the time of the second printing, and the papers 1b to 1d below the second paper are also
The applied pressure value increases. Therefore, a higher copy density is added to the copy density of the first printing.

In the conventional copy form printing method, the above-described copy-enhanced printing for increasing the copy density is performed on a line-by-line basis. For example, as shown in the explanatory diagram of FIG. 4, when printing the pattern “Name: Ichiro Tanaka Address: Kamakura City Account Number: 0123” on one line of the copy form 1,
The print head at the left end stop position Pa accelerates to the normal print speed Vo (AB in the figure) and moves at a constant speed to near the right end stop position Pb (BC). Normal printing is performed when the print head moves forward (B to C) at the normal print speed Vo. After the printing, the print head
The vehicle decelerates and stops at the stop position Pb at the right end (C to D).

The print head stopped at the stop position Pb at the right end immediately accelerates in the reverse direction to the normal print speed Vo (D to C), and moves at a constant speed near the stop position Pa at the left end (C to B). ). Movement of this print head in the return path (C ~
In the case of B), the same pattern at the same position is printed at the same dot forming position, thereby increasing the copy density of all patterns in one line. After that, the print head decelerates and stops at the left end stop position Pa (B to A) to prepare for printing of the next line.

Further, as another conventional printing method, 1
Print a specific area in a line multiple times and set the dot formation position to 1
A printing method has been proposed in which the dots are shifted to the left or right or up and down (JP-A-62-233254). In this printing method, by shifting the printing position by one dot, the dot density of printing is increased and the optical reading of the printing is facilitated.

[0010]

As described above, in the conventional copy form printing method, since the copy enhanced printing is performed on a line-by-line basis, it is not possible to increase the copy density of only the necessary pattern in one line. Moreover, in the case of copy-enhanced printing, the print head moves back and forth on the same line at the same normal printing speed, and therefore prints twice as many times as the normal printing time for one line. It takes time.

In the conventional printing method in which a specific area in one line is printed a plurality of times, the dot forming position is shifted by one dot. Therefore, when the copy form 1 is printed by this method. In the second printing, the pressure value due to the impact of the wire applied to the second and subsequent sheets of paper does not increase so much, so the copy density does not increase so much. In addition, when a character having a high density is printed by this printing method, the character is crushed and the printing quality is rather deteriorated.

The present invention has been made to solve these problems, and when printing on a copy form,
It is an object of the present invention to provide a copy form printing method in a wire dot printer that can perform copy-enhanced printing of only required patterns in one line quickly and without deteriorating print quality.

[0013]

In order to achieve the above object, in the copy form printing method according to the present invention, a specific area in one line is printed a plurality of times with the same dot forming position, When printing the specific area for the second time and thereafter, the print head moves in areas other than the specific area at a speed higher than the moving speed during printing.

[0014]

According to the above-mentioned copy form printing method, by performing the printing of the specific area in one line a plurality of times with the same dot formation position, the copy-enhanced printing of only the necessary pattern in one line is performed. Further, when the print head performs the second and subsequent printing of the specific area, by moving the area other than the specific area at a speed higher than the normal printing speed which is the moving speed at the time of printing, the print head can perform the same normal printing. It becomes possible to perform copy-enhanced printing more quickly than when moving back and forth one line at a speed.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory diagram for explaining a copy form printing method according to the present invention. In FIG. 1, the same parts as those in the conventional example shown in FIG. 4 are designated by the same reference numerals.

In the copy form printing method in this wire dot printer, printing of a specific area in one line is performed a plurality of times with the same dot forming position. As a result, the copy-enhanced printing of only the necessary pattern in one line is performed.

For example, as shown in FIG. 1, in the one-line pattern "Name: Ichiro Tanaka Address: Kamakura City Account Number: 0123" printed on the copy form 1, the name part "Ichiro Tanaka" and the account 2 with the number part "0123"
When performing the copy enhancement printing only for the patterns of the one specific area Q1 and Q2, first, the print head at the left end stop position Pa accelerates to the normal print speed Vo (A to
B), and moves at a constant speed to the vicinity of the stop position Pb at the right end (BC). When the print head is moved in the forward path (B to C) at the normal printing speed Vo, a plurality of wires impact the copy form 1 in synchronization with the movement to form a plurality of dots. Normal printing is performed on all areas in the line, that is, the specific areas Q1 and Q2 and the other non-specific areas R1 and R2. After the printing, the print head decelerates and stops at the right end stop position Pb (C to D).

The print head stopped at the right end stop position Pb immediately accelerates in the reverse direction to the normal print speed Vo (D to E) and moves in the specific area Q2 on the right side at the constant normal print speed Vo. By doing so (EF), the printing of "0123" in the specific area Q2 is performed by setting the dot formation position to 1
Repeat the same as the first time.

As described above, when the print head accelerates from the stopped state at the stop position Pb at the right end to the normal printing speed Vo (D to E), dot formation in the second printing in the specific region Q2 at the right end. Acceleration is performed to some extent so that the position can accurately match the first printing.

After that, the print head moves to the other left specific area Q1 without performing the printing operation. At that time, the print head moves the non-specific area R2 between the two specific areas Q1 and Q2 at the skip speed Vs higher than the normal printing speed Vo. That is, immediately after the second printing of "0123", the normal printing speed Vo is accelerated to the skip speed Vs (F to G), and at the skip speed Vs,
Move to the front of the other specific area Q1 (GH),
The speed is again reduced to the normal printing speed Vo (HI). By moving the left specific area Q1 at the constant normal printing speed Vo (I to J), the printing of "Tanaka Ichiro" in the specific area Q1 is performed again with the dot forming position being the same as the first time. To do.

The acceleration of the print head in the non-specific area R2 from the normal print speed Vo to the skip speed Vs (F to
G) and the deceleration (HI) from the skip speed Vs to the normal printing speed Vo, 2 in the specific area Q1 on the left side
Acceleration and deceleration are moderately performed to some extent so that the dot formation position in the first printing can be matched exactly with that in the first printing.

After the second printing of the specific area Q1, the print head accelerates again to the skip speed Vs (J to K),
The left non-specific region R2 is moved at the skip speed Vs. Further, the print head moves to the vicinity of the stop position Pa at the left end at the skip speed Vs (K to L), decelerates and stops at the stop position Pa at the left end (L to A), and prepares for printing of the next line.

As described above, the print head reciprocates between the left and right stop positions Pa and Pb to move to the specific areas Q1 and Q in one line.
By performing the printing of No. 2 twice with the same dot forming position, it is possible to increase the copy density of the patterns of those specific areas Q1 and Q2, and also to prevent the printing quality from deteriorating. The function of the copy-enhanced printing is as described in the conventional example.

In addition, when the print head performs the second printing on the specific areas Q1 and Q2 by the backward movement, most of the areas R1 and R2 other than the specific areas Q1 and Q2 are printed at the normal printing speed Vo. Since the print head moves at a higher skip speed Vs, copy-enhanced printing can be performed more quickly than in the case where the print head moves at the same normal print speed Vo for both reciprocations as in the conventional example.

The series of operations for the above-described copy-enhanced printing is as follows.
It is controlled by a command from an external device.

Further, in the above embodiment, the printing of the specific areas Q1 and Q2 in one line was performed twice, but it may be performed three times or more. In this case, when performing the second and subsequent printing of the specific areas Q1 and Q2, the print head is
Since most of R1 and R2 are moved at a high skip speed Vs, the printing time is greatly shortened as compared with the case where the same number of times of printing is repeated by the conventional copy form printing method.

[0028]

As described above, according to the copy form printing method of the present invention, it is possible to perform the copy enhanced printing of only the necessary pattern in one line quickly and without deteriorating the print quality. ..

Generally, in printing on a copy form,
Since it is often necessary to increase the copy density in a part of one line, the present invention can provide a very useful copy form printing method.

[Brief description of drawings]

FIG. 1 is an explanatory diagram illustrating a copy form printing method according to the present invention.

FIG. 2 is a state explanatory view when printing is performed on a copy form by a serial type wire dot printer.

FIG. 3 is a diagram illustrating a state in which a dot is formed at the same position on a copy form and a second printing is performed by a serial type wire dot printer.

FIG. 4 is an explanatory diagram illustrating a conventional copy form printing method.

[Explanation of symbols]

 1 Copy form Q1, Q2 Specific area R1, R2 Non-specific area Vo Normal printing speed Vs Skip speed

Claims (1)

[Claims] 1. A print head comprising a plurality of wires moves relative to a print medium, and in synchronization with the movement, the plurality of wires press the print medium to form a plurality of dots for printing. In a serial-type wire dot printer that performs the normal printing operation that prints all the characters and symbols on the print line, and the characters and symbols printed by the normal printing operation are overlaid on the characters and symbols in a specific area. Repeats the printing operation in the specified area for printing, moves the print head at a speed higher than the moving speed during printing in the area other than the specified area, and accelerates the print head at least before printing in the specified area is completed. And a copy form printing method in a wire dot printer, characterized in that the deceleration is smaller than the acceleration during normal printing.