JPS633986A - Perfecting recording apparatus - Google Patents

Abstract

PURPOSE:To set both sides printing regions to the same position, by a method wherein a first blank at the time of the recording of a first page is made almost equal to a second blank at the time of the recording of a second page and a second blank at the time of the recording of the first page is made almost equal to a first blank at the time of recording of the second page. CONSTITUTION:A central control unit l starts a printing program and sets a base number register PCR to 1 at first. When PCR is an odd number, the first space quantity SP1 stored in a register SP1R is outputted to a printer 3 and the printing data corresponding to one line is subsequently read from a document memory part SBR to be transmitted and outputted to the printer 3. Next, when the outputted line is the final line of the page during processing but is not the line of a final page, a page number is increased by 1 to enter the printing of the next even number page and printing is started from the second space quantity SP2 stored in a register SP2R. Herein, since formula is set through all of pages, the blanks of odd and even number pages become respectively symmetric.

Description

[Detailed description of the invention] technology field” The present invention relates to a double-sided recording device.

E. Prior Art Conventionally, when performing double-sided printing with this type of device, if you try to create a binding margin and leave a wide margin on only one side, the printing positions on the back and front will be misaligned, so the printing on the side opposite to the binding margin will be The parts overlap. For this reason, in order to prevent the printed parts on the opposite side from the binding margin from overlapping, the binding margin must be widened on both sides of the paper surface, which not only narrows the printing area but also visually creates extra margins.

"Objective" The present invention was proposed in view of the above-mentioned conventional disadvantages.
To provide a double-sided recording device in which printing areas on the front and back sides are printed at the same position even when left and right margins are different.

L Embodiment" FIG. 1 is a drawing for explaining the basic operation of the embodiment. As shown in the figure, margins SPI and SP2 are provided for odd-numbered pages and even-numbered pages, respectively. If we start printing from the margin SPI position on odd-numbered pages,
The remaining width SP2 is 5P2=paper width−print width−3PI. - 10,000, assuming that printing starts at the SP2' position on an even page, the remaining 119 SPI' is spi' =
Paper width - Print width - 3P2'. Therefore, 5P2=SP
If the printing start position on even pages is controlled so that SP1'=SP1. That is, the width of the margin is the same for even-numbered pages and odd-numbered pages. Therefore, recording of an odd number of consecutively recorded pages is prevented, unnecessary blank spaces can be omitted, and no inconvenience occurs during binding or the like.

FIG. 2 shows the overall configuration of a double-sided recording apparatus that performs such printing. In FIG. 2, 1 is a central control unit that controls the entire system, and 2 is a keyboard for inputting input take, margin take, etc., which is connected to the central control unit 1 by a path.

3 is a printer, which prints characters processed by the central control unit 1; 4 is a RAM memory used as a working area of the central control unit, and a part of this memory is used as a register 5PIR for storing the first space amount SPI.
1 A register 5P2R for storing the second space amount, a page number register PCR1 for storing the page number, and a document storage section SBH for storing the printed document. - direction, RO
In addition to the operating system of the central controller 1, the M5 stores a control procedure program as shown in FIG.

The operation of the embodiment will be described below with reference to the flowchart in FIG.

When a print command from the keyboard 2 is transmitted to the central control device 1, the central control device 1 starts a printing program and control moves to Sl in the flowchart of FIG. At step 31, page number register PCH is set to 1. At S2, it is checked whether the page number register PCR is an odd number or an even number. If odd e, control is transferred to <fs3, and the first space amount SPI stored in the register 5PIR is output to the printer 3. If the number is even, control moves to S8 and the second space amount SP2 stored in register 5P2R
is output to the printer 3. After outputting either space amount to the printer 3, one line of print data is read out from the printer document storage section SBR and transferred to the printer 3 in S4.

Next, in S5, it is checked whether the line output in S4 is the last line of the page being processed indicated by the page number register PCR. If it is not the last row, the process returns to S2 and repeats the output of the remaining rows.

If it is determined in S5 that it is the last line, it is checked in S6 whether the page number indicated by the page number register PCH is the last page. If it is the last page, printing is finished, but if not, the process moves to S7, where 1 is added to the contents of the page number register PC, and the page number is incremented by 1. And again S2
Go back and start printing the next page. If the current printing is an odd numbered page, the next time printing will be an even numbered page, and printing will start from SF3 as described above. Here, since all pages are set to 5P2 = paper width - printing width - 3Pl, the margins of odd and even pages are symmetrical, and the printing positions on the front and back sides overlap.

Note that the margins SPI and SP2 can be set arbitrarily, and by setting their sizes appropriately, the print area can be moved to either the left or right side of the paper.

In this way, according to this embodiment, it becomes convenient to file and bind recorded materials. Furthermore, since there is no need to take extra blank space, the recording area can be used effectively.

"Effects" As explained above, according to the present invention, the recording areas of each page are recorded so as to overlap, and the margins on each page are aligned, making the recording result easy to read. It can be used as

[Brief explanation of the drawing]

Fig. 1 is a diagram for explaining the basic operation of the embodiment, Fig. 2 is a block diagram showing the entire embodiment, and Fig. 3 is a diagram for explaining the basic operation of the embodiment.
3 is a flowchart illustrating the operation of the embodiment shown in the figure. Patent applicant Canon Co., Ltd. Figure 1 Figure 2

Claims (1)

[Claims] It has a storage means for storing a document, and a storage means for recording the document, a first margin taken when recording a first page, and a second margin taken when recording a second page. are approximately equal, and the second margin taken when recording the first page and the first margin taken when recording the second page are
A double-sided recording device characterized by comprising margin control means for making the margins of the two sides substantially equal.