JPS63254082A - Printer - Google Patents

Abstract

PURPOSE:To magnify the printing area of printing paper, by constituting the title printer in the manner that a paper presser for pressing the printing paper is separated from the printing paper until the feed quantity of the printing paper becomes a definite quantity. CONSTITUTION:In the case of such a structure that a printing paper is fed by raising a paper presser 3 if necessary by the electrical signal to a plunger 6, the printing paper 1 is fed by predetermined quantity and once stopped at a position where said printing paper 1 does not rest on the presser but printing can be performed by a printing head to perform the printing of the first line and, next, the paper presser 3 is raised and the printing paper is fed to again perform printing. This operation is repeated until the paper sufficiently rests on the paper presser and the paper is pressed by the presser and subsequently transferred to normal printing operation. Therefore, printing can be applied even to the blank part of the upper end part of the paper.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is directed to a printer with a wide printing area for printing on printing paper.

An example of the present invention is a printer that wraps printing paper around a platen and prints while feeding the paper sequentially.The printer has a printing area wider than conventional printers by having the printing area at the beginning of m paper. It flashes.

[Conventional technology]

In a conventional printing device, when printing by wrapping a cut sheet around a burlap, the first part of the cut sheet cannot be printed because there is a paper presser for holding down the paper. That is, the paper must be wrapped around the platen, the leading edge of the paper must be held down by the paper presser, and printing will begin from the next area, and the paper must be fed until the leading edge of the paper reaches the area of the paper presser before printing can be performed.

(Problem to be solved by the invention) Therefore, if the paper presser is completely omitted and printing is possible, there will be no problem, but the paper will rise above the platen and the print quality will deteriorate. In this case, some kind of contrivance must be taken in order to print as many lines as possible in the first area of the paper.This explanation of the prior art is merely an example, but it is possible that the printing head overlaps with another object. In some cases, the printing area of the printing paper cannot be expanded because it is impossible to arrange the printing paper in such a way that some kind of contrivance other than the example described here is necessary.

An object of the present invention is to expand the printing area of printing paper.

Another object of the present invention is to expand the printing area without changing mechanical parts or arrangement.

Still another object of the present invention is to - increase the number of printed lines within a page by expanding the printing area at a relatively edge of the printing paper, for example at the beginning of a cut sheet.

[Means for solving problems]

The present invention is a printer device that prints by wrapping printing paper around a printing platen, characterized in that a paper presser that presses down the printing paper is separated from the paper until the feeding amount of the printing paper reaches a certain amount. do.

〔Example〕

1 and 2 are examples of the present invention, in which 1 is printing paper, 2
is the platen, 3 is the paper presser, and 3a is the glue for holding the paper.
4 is the print head, 5 is a spring for holding the paper presser 3 on the platen, 6 is a plunger for lifting the paper presser 3, 6a is the operating direction, 7 is the paper presser 3 for r
The cam means 8 is a motor for operating the cam means 7. The embodiment shown in FIG. 1 has a structure in which the printing paper 1 is fed by lifting the paper presser 3 as required by a plunger 6 using an electric signal, and the embodiment in FIG. Each example shows an example in which a method is used to lift the holder.

In FIG. 1, the printing paper 1 is fed by a predetermined amount, and at a position where it does not hit the paper presser but can be printed by the print head, it is temporarily stopped and the first line is printed. Next, paper presser 3
Lift up, feed the paper, and print again. This operation is repeated until the paper is sufficiently caught on the paper presser, and once the paper is pressed down on the paper presser, normal printing operation begins. In this way, it is possible to print even on the blank area at the upper end of the paper. If the paper is fed from the beginning until it is pressed by the paper presser 3, it is not possible to print on the top edge, and the number of printed lines cannot be increased.

In Figure 2, the paper presser 3 is lifted by the cam 7 for a certain period of time, and after printing, the paper comes under the paper presser and is sufficiently pressed, and then the cam is rotated by the step motor 8 to restore the original state. Return to position.

The figure shows that the cam and motor are mechanically linked.

FIG. 3 is a block diagram related to control signals. Reference numeral 10 is a master unit that has a central control unit (CI) that controls the printer 11. A print command signal from 10 is received by an input cover sofa 12. The printing system signal goes to 13, and the paper presser or paper feed signal goes to 14.
5, and their internal circuit diagrams are similar to those of printers currently on the market.

The input buffer 712 calculates the paper feed amount of the signal coming from the base unit 10 at a pitch of 1/120 inch or 1/180 inch, and is counted by 14. For example, if the paper feed distance up to the paper presser is 20 mm, then After setting the paper in the machine and printing, there is a risk that the paper will get caught in the paper presser and cause jamming while feeding the 20mm paper, so for safety purposes, lift the paper presser and feed the paper. There is a need. In this respect, in the embodiment shown in FIG. 2, the paper is held by a mechanical cam until it is caught on the paper presser, but this may also be done electrically. The embodiment of FIG. 1 can be handled by changing the software programming inside the printer without adding any mechanical mechanism. If the paper feed is approximately 20 mm, in the case of 1/120 inch pitch, approximately 9
In the case of 5-pulse 1/180 inch, it is necessary to lift the paper presser until 142 pulses are accumulated in the input buffer.In the case of Figure 1, when one line of printing is completed, the paper presser is lifted, the paper is fed, and the plunger is pressed. In order to reduce power consumption, the operation of returning the paper presser to its original position and printing is reversed, which does not look good. In this respect, the embodiment shown in Fig. 2 has more mechanical parts, but in the printing process, the paper presser foot 3 is connected to the UP position at a distance from the platen, so it is used. Although it does not look unsightly for the operator, in order to ensure printing quality, it is better to send the paper and return the paper presser to its original position before printing, so the shape of the cam means 7 is changed. Alternatively, each time printing is performed, the cam may rotate one revolution or a predetermined angle and then return to its original position. The present invention is particularly effective when an auto-cut sheet feeder is used, but it is also effective when feeding manually or when continuous forms are fed from the back. Figure 4 is a flowchart of Figure 21T1. When the print command starts, the paper is sucked in, but at that time the suction boat is unstable and may collide with the leading edge of the paper or the paper presser, so for safety reasons, , Even if you press the paper presser (Ul') L from the beginning, 41 will not bend. In this flowchart, it is indicated by a dotted line. After sucking the paper, move the paper presser down (DOWN) and start the printing process. When the predetermined amount of printing is completed, move the paper presser (UP) and feed the paper (paper feed).
DOWN). Amount sent at this stage Nl/120
is counted by an internal counter and judged whether it has reached 95 pulses. If it has reached 95 pulses, it is judged as (YES) and moves to the sequence on the right side for printing, enters the -/general print line fv of paper feed, and goes to (No). Then, repeat the same steps as stamp IEII, paper presser UP, paper feed, paper presser DOWN,
Continue until the paper feed amount becomes 95 pulses (Ni + N2/120).

Fig. 5 starts with the flowchart in Fig. 2, and for safety's sake, you may first press the paper presser (Ur'), and after sucking the paper and printing, press the paper presser (UP) and press the paper as it is. Hold up the presser foot. The paper feed amount is 95 in the same way as in Figure 4.
When the pulse (05/120 inches) is reached, the sequence moves to the right side, the paper push is turned down (DOWN), and the process moves to the general printing process of printing and paper feeding.

〔Effect of the invention〕

As described above, the present invention is an epoch-making method that can increase the printing area of paper by making partial changes without major modification. In particular, when the printing area does not need to be expanded severely, the dip switch can be used to switch to this method only when necessary, making it possible to adapt the system to suit the user-friendliness of the system depending on the frequency of use.

[Brief explanation of drawings]

FIGS. 1 and 2 are diagrams showing specific examples for implementing the present invention, respectively. FIG. 3 is a block diagram of the driving portion of the present invention. 4 and 5 are schematic diagrams showing flowcharts of the embodiment, respectively. 1: Printing paper, 4: Printing multi-bin head 2 nib laten, 7: Cam means 3: Paper presser and above Figure 2 Figure 3: ; : i! Figure 4

Claims (1)

[Claims] A printer device that prints by wrapping printing paper around a printing platen, wherein a paper presser that presses down the printing paper is separated from the paper until the feeding amount of the printing paper reaches a certain amount.