JP3033013B2 - Printer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer for a computer, and more particularly, to a printer having a serial number for preventing tampering.
A printer device that prints ID information, printing date, and time of the printer device is useful for printing accounting documents, contract documents, medical records, and other documents that must not be falsified.

[0002]

2. Description of the Related Art Conventional computer printers are:
Controlled by signals from the computer itself, the document content information from the computer is printed on paper (paper / film)
Print on The printable area of the paper is defined. In many cases, the number of pages is printed for each sheet or for each page in this printing area. In this conventional printer device, it is easy to change the contents, drop out of a page, and add a page. In addition, the number of pages can be changed and printing can be performed. Deletion is easy, and the reliability and proof of the document is often insufficient.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to solve the conventional problems and to provide a printer device which is difficult to be tampered with.

[0004]

SUMMARY OF THE INVENTION 1) In a printer device for printing document contents such as characters, symbols, and patterns on a sheet based on a signal from a computer main body, a page counter value is set every time one sheet or one page is fed. And a page counter for recording the page counter value of the serial number obtained by adding 1 to a non-volatile storage medium which is not cleared by opening / closing the power supply of the printer device, and clearing the power supply of the printer device for recording the page counter value of the page counter. A non-volatile storage medium that is not printed, and a signal from the computer main body that prints the page counter value stored in the same page counter in a non-printable area of a sheet of paper that cannot be printed by a signal from the computer main body every time one page or one page is sent. in a not accessible independent serial number printing unit, moreover serial numbers printed portion
In addition to the serial number, the ID information of the printer
Information and printing date / time information are also printed together .

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, the range in which a computer running printing software can print on a printer device is only a print area portion of a sheet, and a non-printing area (a non-print area) is provided around a peripheral portion of the sheet. Area), but
Here, a serial number printing unit that operates independently of the printer device prints the serial number for each sheet or each page. Therefore,
A serial number is printed on the non-printing area on the paper printed by the printer device of the present invention. Even if the software of the computer main body is operated, printing cannot be performed in this non-printing area, so that the number of pages having the same serial number cannot be printed. Also, even if printing is performed using the same printer device as in the present invention, pages having the same number cannot be printed because they are serial numbers. Therefore, it is difficult to falsify the printed document. Furthermore, if the ID information, printing date, time, and time of the printing device other than the serial number are printed in the non-printing area, falsification becomes more difficult. As a printing method of the printer device of the present invention, a dot printer, a laser printer, an ink jet printer, or the like can be used, and a signal of one sheet of the page counter or one page sent is a signal of a sheet detection sensor. Or, a sensor for detecting the rotation and movement of the shaft and belt of the paper drive system can be used, and the one originally attached to the printer device,
In some cases, a separately provided one may be used. As a nonvolatile storage medium of the page counter, a nonvolatile RA is used.
Storage media such as M, FD, HD, and MO can be used. The area where the page counter value of the serial number printing section is printed may be any one of the upper side, the lower side, and the right and left sides of the sheet. Desirably, the peripheral area where printing is difficult in the original printing unit of the printer device is preferable. The ID information of the printer device and the printing date / time information can be expressed not only by numerals but also by characters, symbols, years, special characters, patterns, colors, and the like.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a structural explanatory diagram of the embodiment, FIG. 2 is a circuit block diagram of the embodiment, and FIG. 3 is an explanatory diagram showing a printing state of paper according to the embodiment. In FIG. 1, reference numeral 1 denotes a laser printer type printer device, and 1a denotes an original laser printer unit of the printer device 1, which prints characters, symbols, patterns, and the like in a print area of a sheet. 1b is a paper hopper, 1c is a paper detection sensor using a photo sensor, 1d is a feed roller, 1f
Denotes a paper discharge unit, and 1g prints, in the paper feed direction, a page count value of a serial number, alphanumeric characters indicating individual ID information of the printer device 1, and numbers indicating printing date, time, and minute on the side edge of the paper. The dot printer, 1h is a paper receiving unit, 1i is a counter unit that adds a value of 1 to a digitally expressed page counter value by a signal from the paper detection sensor 1c, and 1j stores a page counter value 3f of the counter unit. Non-volatile writable RAM, 1k is dot printer 1
g is a dot printer control unit using a CPU that controls printing, and is not controlled or accessed from the personal computer body 2. Reference numeral 1l denotes a digital clock unit for generating the date and time, 1m denotes a printer control unit for controlling printing of a printer unit 1a for printing on a portion of an original document printing area of the printer device 1, and 1n denotes a part in the document printing area. A padding character generating section for generating a special symbol for padding a blank portion that is not printed. The padding character generating section generates padding characters from print document information from the personal computer 2, and sends the padding characters to the printer control section 1m. 1o is a printer cable. Reference numeral 2 denotes a computer main body, 3 denotes paper, 3a denotes a document printing area printable by the printing unit 1a of the paper 3, and 3b denotes a non-printing area of a document to be printed by the dot printer 1g. 3c
Is a document character printed on the document print area 3a, 3d is a padding symbol for filling a blank portion in the document print area 3a without the document character 3c, 3e is a printer ID character, 3f is a page counter value, and 3g is a print counter value. 3H is the date at the time of printing, 3j is the value at the time of printing, 3k is the minute at the time of printing, 3l is the value of the minute at the time of printing, and 3l is the value in the document printing area 3a. It is the numerical value of the original page of the document.

In the present embodiment, a print command and information on a print document are sent from the personal computer body 3 through the printer cable 1o, the printer control unit 1m issues a paper feed command from the paper hopper 1b, and the fill character generating unit 1n Document print area 3a
When the paper 3 is sent to the print unit 1a by the feed roller 1d, the document character 3c, the padding symbol 3d and the numerical value 31 of the original page of the document are printed in the document print area 3a. . On the other hand, a paper feed signal from the paper detection sensor 1c is input to the page counter 1i.
The page counter value 3f is added and stored in the nonvolatile RAM 1j, and the page counter value 3f is output to the dot printer control unit 1k. Dot printer control unit 1
k, the page counter value 3f from the page counter unit 1i
Is input from the digital clock section 11 to send a command to print to the dot printer 1g together with the printer ID character of the printer. When the paper 3 is sent from the printing unit 1a, the dot printer 1g
Are the ID information 3e of the printer device, the page counter value 3f, the numerical values 3g, 3h, 3i, 3j,
3k is printed in the horizontal direction along the paper feed direction. When printing is performed by the dot printer 1g, the paper 3 printed on the paper receiving unit 1h is discharged from the paper discharging unit 1f. FIG. 3 shows the printed sheet 3. As described above, at the left end of the sheet, the ID information 3e of the printer device, the page counter value 3f determined only by feeding the sheet irrespective of the document page 3l, and the numerical values 3g, 3h, 3i, 3j of the date and time at the time of printing. , 3k, the printed document can be prevented from dropping and adding pages, and even if it is printed by another printer device, it is difficult to falsify it because the printer device ID, printing date, serial number, etc. are different. . Even if the same printer is used, the page counter value 3f of the serial number and the numerical values 3g, 3h, 3i,
No tampering is possible with 3j and 3k.

[0008]

As described above, according to the present invention, the printer device prints the page counter value of the serial number in the non-printable area which cannot be printed from the personal computer main body by the independent serial number printing unit, thereby dropping or adding pages. Making pages and pages difficult to tamper with. Further, since the printed 1D information and print date and time of the printer to document printing extracellular region was assumed to be able to have been more difficult to tamper, it enhances the probative force of the document.

[Brief description of the drawings]

FIG. 1 is a structural explanatory view of an embodiment.

FIG. 2 is a circuit block diagram of an embodiment.

FIG. 3 is an explanatory diagram illustrating a printing state of a sheet according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printer apparatus 1a Printing section 1b Paper hopper 1c Paper detection sensor 1d Feed roller 1e Digital clock section 1f Paper discharge section 1g Dot printer 1h Paper receiving section 1i Counter section 1j RAM 1k Dot printer control section 1l Digital clock section 1m Printer control section 1n Filling character generator 1o Printer cable 2 PC body 3 Paper 3a Document printing area 3b Outside document printing area 3c Document character 3d Filling symbol 3e Printer ID character 3f Page counter value 3g Year value 3h Month value 3i Day value 3j hour Numerical value of 3k Numerical value of 3l page

Continuation of front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B41J 29/40 B41J 3/44 G06F 3/12

Claims (1)

(57) [Claims] 1. A printer device for printing document contents such as characters, symbols, and patterns on a sheet in response to a signal from a computer main body, wherein a page counter value is incremented by one each time one sheet or one page is fed. A page counter that records the page counter value of the serial number on a non-volatile storage medium that is not cleared by opening and closing the power supply of the printer device; and a non-volatile storage medium that records the page counter value of the page counter and that is not cleared by opening and closing the power supply of the printer device. The page counter value stored in the same page counter is printed every time one sheet or one page of the paper is fed, and cannot be printed by a signal from the computer body. It has a printing section , and the serial number printing section prints documents.
Prints ID information of printer device in addition to serial number in outside area
A printer device which prints year, month, day and time information together .