JPH07119124B2 - Printer - Google Patents

Description

The present invention relates to a printing apparatus for printing a character pattern based on inputted vector data representing a character to be printed.

[Prior Art] As described in US Pat. No. 4,571,069 and the like, a conventional printer is provided in a subsequent stage of a reception buffer in order to restart output from a page where output has not ended when a paper jam occurs. It had a configuration with multiple page memories.

[Problems to be Solved by the Invention] However, in the case of forming a complicated image in the page memory based on the vector data in the above conventional example, a large amount of image information in the page memory is generated as compared with the reception buffer. Therefore, there is a drawback that the storage area is taken up too much.

[Object] In view of the above points, it is an object of the present invention to provide a printing apparatus that does not need to store even unprinted vector data and can reliably reprint even when a paper jam occurs.

[Examples] Examples of the present invention will be described below with reference to the drawings.

The vector data referred to in the present invention means data in which a character or a graphic is represented by its contour point (end point) information instead of a dot signal.

FIG. 1 is a block diagram best showing the features of the present invention.
Reference numeral 1 is a host computer or a graphic display, 2 is a vector pattern printer control unit to which the present invention is applied, and 3 is an output unit of the printer. The vector data input from 1 enters the reception buffer. The address management unit 4 manages the head address of the data in the reception buffer corresponding to the page for which the paper discharge is next completed, and discards the data in the corresponding buffer when the paper discharge is completed. The received data is expanded by the image generator 6 as image information in the page memory 7. Microprocessor 8 controls 4 and 7. Reference numeral 9 denotes an electrophotographic apparatus, which forms an image on the paper surface using toner from image information in a page memory. 10 is a transport roller that also serves as a fixing device, and removes the toner attached to the paper sent from 9
Here, it is fixed and sent to the tray 11. Reference numeral 12 is a sensor that detects the presence of paper and the like, and detects a paper jam and the end of discharge by installing a plurality of paper conveyance paths. A switch 13 indicates that the jammed paper has been removed. 9,1
0, 12, 13 are controlled by the microprocessor 14.

FIG. 2 shows two processing procedures performed by the address management unit. In normal output, only 15 processes are performed, and 16 processes are performed only when a paper jam occurs.

When the fact that the paper has been discharged is detected by 12, it is reported to the address management unit 4 via 14 and 8. Then, 4 changes the start address (referred to as page pointer) of the data in the buffer corresponding to the next page to be discharged to the address of the start data of the next page, and S1 corresponds to the page where the discharge is completed. S2 to discard the data in the buffer.
If the paper is jammed, wait until the switch 13 informs you that the jammed paper has been removed and then reprocess from the address indicated by the page pointer that is currently being managed. S3 to order. Note that the output unit 3 of the printer may be capable of double-sided printing or bag-stitching printing, for example, and as shown in FIG.
It goes without saying that the page pointer in S3 can be appropriately corrected.

As described above, according to the present embodiment, the vector data is temporarily stored in the reception buffer, the image is developed in the page memory based on the vector data, and the image data is output. By having a copy, it is possible to easily re-output from the page corresponding to the jammed paper based on the information from the address management without having to have multiple page memories, which saves storage device vector. It became possible to provide a pattern printer.

[Effects of the Invention] As described above, according to the present invention, it is possible to provide a printing apparatus that does not need to store even unprinted vector data and can reliably perform reprinting even when a paper jam occurs. It was

[Brief description of drawings]

FIG. 1 is a block diagram showing the present invention, and FIG. 2 is a control flow chart. 5 is a buffer, 4 is an address management unit, and 7 is a page memory.

Claims (1)

[Claims] 1. An input unit for inputting vector data representing a character to be printed from a host device, a storage unit for storing the vector data input by the input unit, and the storage unit corresponding to a page to be printed. A page pointer storage unit that stores a page pointer that specifies a position where vector data is stored; a printing unit that prints a character pattern generated based on the vector data stored in the storage unit; and the printing unit. Detection means for detecting the end of the discharge of the printed paper according to: and the detection means detects the end of the discharge of the paper printed by the printing means, and then is stored in the page pointer storage means. After the page pointer is updated and a paper jam occurs, the page pointer stored in the page pointer storage means is used. Printing apparatus characterized by having a means for generating a character pattern on the basis of the vector data stored in the position to be constant.