JPH0570591B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a printer control method that facilitates reprinting when an error occurs.

[Background of the invention]

FIG. 3 is a schematic diagram of a printer employing an electrophotographic method. The surface of the photosensitive drum 1 is uniformly charged by a charger 2. The laser beam from the laser oscillator 3 is modulated into dot-shaped light via the modulator 4 according to print data from the printer control circuit 14, and then scanned on the photosensitive drum 1 by the rotating polygon mirror 5. Form an exposed image of print data. The exposed image on the photosensitive drum 1 is developed with toner by a developing device 6, and then the toner image is transferred onto printing paper 13 by a paper feeding mechanism 7 and a transfer device 8. Toner remaining on the surface of the photosensitive drum 1 without being transferred to the paper 13 in this transfer process is cleaned by the cleaning brush 12. The toner image on the paper 13 is preheated by a preheating plate 9, and is heated and pressed by a heat roller 10 and a pressure roller 11, so that the print data is transferred to the paper 13.
is fixed to.

Conventionally, when an error such as a paper jam occurs in this type of printer, points b to c in Fig. 3
Since the pages of the unfixed portion of the point and the untransferred portion of the points a to b become unusable, when reprinting, it is necessary to return to the page before the page of point c and perform printing. Figure 4 shows the paper 13 when a paper jam occurs, and points a and c.
It shows the relationship between points and the font used on the reprinted pages a to c. In this printing example, reprinting will start from page n. In addition, for page (n-1) page n, page (n+1), and page (n+2), a Select command is sent to the printer control circuit 14 from a host device (not shown).
Font2, Slect Font3, and Slect Font4 commands have been issued, indicating that the font used has been changed. Therefore, before starting reprinting from page n, the host device selects Select to change the font used from Font3 to Font2.
Font2 commands must be issued.

As described above, in order to start reprinting with this type of printer, the font used at the beginning of each page must be recorded in the host device.
In conventional line printers, only one type of font can be used, so the above-mentioned functions are not necessary for the host device. For this reason, it has not been possible to easily replace the line printer with the above-mentioned page printer.

[Purpose of the invention]

An object of the present invention is to eliminate the above-described drawbacks of the prior art and to reduce the load on the host device for reprinting in this type of printer.

[Summary of the invention]

The present invention focuses on the fact that reprinting starts from the top of the page, and allows the font to be used at the top of the page to be set for each job.

[Embodiments of the invention]

Embodiments of the present invention will be described with reference to FIGS. 1 and 2. FIG. 2 is a block diagram of the printer control circuit. The operator sets the font number using the switch group 15 before starting the job. When a job is started, the printer control circuit 14 always selects the font set by the switch group 15 at the top of the page. FIG. 2 shows commands from the host device and changes in the font used when performing the same printing shown in FIG. 4. In this example,
It is assumed that font number 2 is set in the switch group 15, and Font 2 is selected at the beginning of each page regardless of the command received from the host device. Therefore, even though the font first used on page (n+1) has been changed to Font2, the host device cannot select “Select”.
Font2” command is not issued, Font2 is automatically
is selected by the printer control circuit 14. Also, even if you start reprinting from page n, printing will start from the top of the page, so Font2 will be automatically selected, so add a command to change the font used as explained in Figure 4. It does not need to be issued.

In the above embodiment, the font number to be used at the top of the page is set by the switch group 15, but the present invention is not limited to this, and the font number may be set by a command from a host device. .

〔Effect of the invention〕

According to the present invention, since the font to be used at the beginning of a page is set for each job, there is no need to store the font to be used at the beginning of each page in the host device for reprinting. It becomes possible to easily replace a printer with a page printer.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of a printer that employs the method of the present invention, Fig. 2 is an explanatory diagram showing the relationship between printed paper and fonts used, and Fig. 3 is a printer to which the method of the present invention can be applied. FIG. 4 is an explanatory diagram showing the relationship between paper sheets and used fonts according to the conventional method.

Claims (1)

[Claims] 1. In a page printer that can use a large number of fonts, it operates as if one limited font is always specified as the type of font to be used at the beginning of each page, and uses fonts other than the limited font. To control a printer, the method is characterized in that the font to be used is sometimes required to be specified and changed again on each page, and the settings of the limited font types can be freely changed.