JPH106583A - Method for controlling paper carrying speed in printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To always and stably carry paper by a method wherein a plurality of printers are connected in series to print a continuous paper with no carrying hole and even when the length of the paper is changed by the influence of heat, etc., such a problem as cutting of the paper in the midway of printing is avoided. SOLUTION: The amt. of buffer of a paper 1 between a printer A2 placed on the upstream and a printer B4 placed on the downstream is detected and when the amt. of the buffer is large, printing speed of the printer 4 is made faster than the printing speed of the printer 2 and when the amt. of the buffer is small, control for performing in its reverse way is performed. A similar control can be performed by a method wherein instead of detection of the amt. of buffer of the paper, marks are written by a definite interval on the outside of the printing region of the paper 1 by means of the printer 2 and the marks are read by means of the printer 4 to compare the number of written marks with the number of read marks per unit time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a paper feed speed control method for a printer, and more particularly to a paper feed speed control method for printing on continuous paper by connecting a plurality of printers in series.

[0002]

2. Description of the Related Art Conventionally, when printing on continuous paper by connecting a plurality of printers in series, if the paper is paper having a perforated hole, the perforated paper is fed by a tractor.

By the way, when printing with a printer, the paper length may change slightly due to the influence of heat or the like.

However, in the case of the above-described paper with feed holes, there is a margin between the hole of the paper and the nail of the tractor, so that a plurality of printers connected in series print at the same speed. Even if the paper length slightly changes, there is no hindrance to the paper feed.

[0005]

On the other hand, in the case where the paper is a paper without a perforation hole, when all the printers connected in series are printing at the same speed, the paper is printed by the upstream printer. If the paper sheet shrinks somewhat due to heat or the like, the printer on the downstream side pulls the shrunk paper sheet as described above, and in the worst case, the paper sheet is cut off during printing.

SUMMARY OF THE INVENTION An object of the present invention is to connect a plurality of printers in series to print on continuous paper without feed holes, and to cut the paper in the middle of printing even if the paper length varies due to heat or the like. It is an object of the present invention to provide a paper feed speed control method for a printer that can always stably convey paper without causing a problem such as a paper feed speed.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for controlling a paper feed speed of a printer for printing on continuous paper by connecting a plurality of printers in series. It has a slower print speed and a faster print speed than the print speed, detects the amount of paper buffer between the upstream printer and the downstream printer, and if the buffer amount is large, the downstream printer prints. When the speed is faster than the printing speed of the upstream printer and the buffer amount is small, this is achieved by automatically changing the printing speed of the downstream printer to be lower than the printing speed of the upstream printer.

It is another object of the present invention to provide a paper feed speed control method of this kind, wherein the downstream printer has a lower printing speed and a higher printing speed than the printing speed of the upstream printer. Write a mark at regular intervals outside the print area of the paper at, read the mark with a downstream printer, compare the number of the written mark and the number of read marks per unit time,
If the number of read marks is smaller than the number of write marks, the printing speed of the downstream printer is faster than the printing speed of the upstream printer.If the number of read marks is larger than the number of write marks, the downstream This can also be achieved by automatically varying the printing speed of the printer at a lower speed than the printing speed of the upstream printer.

[0009]

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

FIG. 1 shows a printer connection diagram for explaining a first embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a sheet to be printed, 2 denotes a printer (A) for printing first, and 3 denotes a position between the printer (A) 2 and a printer (B) 4 described below. A paper buffer amount monitoring circuit for detecting the buffer amount of paper between the two printers (A) 2 and (B) 4 is a printer (B) for printing second, and a printer (B) 4
Has a printing speed slower and faster than the printing speed of the printer (A) 2, detects the buffer amount of the paper 1 between the printer (A) 2 and the printer (B) 4, and detects that the buffer amount is large. Makes the printing speed of the printer (B) 4 faster than the printing speed of the printer (A) 2 (reference printer). If the buffer amount is small, the printing speed of the printer (B) 4 is reduced to the printer (A). )
The control for making the printing speed slower than the printing speed of No. 2 is performed.

FIG. 2 shows a printer connection diagram for explaining a second embodiment of the present invention.

The paper 1 is printed through the printer (A) 2 which prints first. At this time, a mark is written at regular intervals outside the print area of the paper 1. FIG. 3 shows an example of mark printing. That is, reference numeral 5 in FIG. 3 indicates a mark printed at regular intervals outside the print area of the sheet 1.

Returning to FIG. 2, the mark 5 is read by the printer (B) 4 for second printing, and the number of marks 5 written by the printer (A) 2 per unit time and the printer (B) read it. Comparing the number of marks, if the number of read marks is smaller than the number of write marks 5, the printing speed of the printer (B) 4 is made faster than the printing speed of the printer (A) 2, and
If the number of read marks is larger than the number of print marks, control is performed to make the printing speed of the printer (B) 4 slower than the printing speed of the printer (A) 2.

[0015]

According to the present invention, a plurality of printers are provided by changing the printing speed by checking the buffer amount of the paper to be printed or the number of marks written at regular intervals outside the printing area of the paper. Even when printing on continuous paper without feed holes by connecting in series and the paper length is variable due to heat or the like, the paper is always stable without causing the problem of cutting the paper during printing. Can be transported.

[Brief description of the drawings]

FIG. 1 is a printer connection diagram for explaining a first embodiment of the present invention.

FIG. 2 is a printer connection diagram for explaining a second embodiment of the present invention.

FIG. 3 is a diagram showing an example of printing marks on a sheet used in the embodiment shown in FIG. 2;

[Explanation of symbols]

1 ... paper to be printed, 2 ... printer to print first (A), 3 ... paper buffer amount monitoring circuit, 4 ... printer to print second (B), 5 ... mark.

Claims (2)

[Claims] A method for controlling a paper feed speed of a printer for printing on continuous paper by connecting a plurality of printers in series, wherein a downstream printer has a printing speed lower than a printing speed of an upstream printer. The printer detects the amount of paper buffer between the upstream printer and the downstream printer, and if the amount of buffer is large, reduces the printing speed of the downstream printer to that of the upstream printer. A paper feed speed control method for a printer, wherein the print speed of a downstream printer is automatically changed to be lower than the print speed of an upstream printer when the buffer amount is smaller than the print speed. 2. A method of controlling a paper feed speed of a printer for printing on continuous paper by connecting a plurality of printers in series, wherein the downstream printer has a printing speed lower than the printing speed of the upstream printer. With high print speed, the upstream printer writes marks at regular intervals outside the paper print area, reads the marks with the downstream printer, and compares the number of write marks and the number of read marks per unit time. If the number of read marks is smaller than the number of write marks, the print speed of the downstream printer is faster than the print speed of the upstream printer, and the number of read marks is larger than the number of write marks. Is characterized in that the printing speed of the downstream printer is automatically changed to be slower than the printing speed of the upstream printer. Paper feed speed control method for that printer.