JPS59171679A - Printer - Google Patents

Abstract

PURPOSE:A printer capable of printing only on a blank part of a preprinted paper, wherein whether or not a part on which printing is to be conducted is a blank part is detected, and a carriage-returning and line-shifting operation or a skipping operation is performed when a non-blank part is detected. CONSTITUTION:When a blank part is detected by a reading sensor 4, a blank part detection signal S6 is outputted, and is inputted into a controlling signal decoder 16. When a printed part is detected by the sensor 4 with the result that the signal S6 is not outputted, the decoder outputs a pattern buffer controlling signal S3, a carriage motor controlling signal S4 and a paper feed controlling signal S5 after a printing head 1 arrives at the position of the sensor 4, and a carriage-returning and line-shifting operation, a paper-feeding operation and a carriage-skipping operation are conducted. It is unnecessitated to perform a document-editing workover again in accordance with the printing paper.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a printing device, and particularly to a character processing device that prints a document on paper (preprinted paper) on which a portion is printed in advance. It is i.

BACKGROUND OF THE INVENTION In a document processing device having a document storage device, documents that are frequently used on a daily basis can be stored once in the storage device and retrieved from the storage device when necessary to obtain the document by instructing printing. Even when printing a document on paper that has other documents, pictures, graphs, etc. printed on it in advance, you can specify the areas on which other documents, pictures, graphs, etc. are printed at the time of creating the document. , it is possible to obtain the desired printout.

However, with such conventional printing devices, the size of pre-printed documents, pictures, etc. may change, or
When the size of the printing paper changes, or when the paper is misloaded into the printing device, printing may occur overlapping the previously printed area or printing may occur outside the paper. In this case, even if the contents of the document are the same, there is a drawback that the document must be edited again and again.

Purpose The purpose of the present invention is to eliminate the above-mentioned drawbacks and provide a detection means for detecting whether or not the area to be printed is blank. The configuration is such that printing is performed after performing the editing operation, so that even if the paper to be printed is preprinted, printing is performed only on blank areas, making it easier for civil servants to edit by changing the paper, etc. An object of the present invention is to provide a printing device capable of performing a printing operation without redoing the printing operation.

Example The present invention will be described in detail below with reference to the drawings.

FIG. 1 shows an example of a thermal transfer printer as an embodiment of the printing apparatus of the present invention. Here, / is a thermal head, and ko is an ink ribbon. The thermal head 1 melts the heat-melting ink ribbon λ and prints on the printing paper 3. A blank paper sensor detects whether or not the portion of the printing paper 3 on which printing is to be performed is blank. In the evening it was an ink ribbon cassette. O is the support stand, which includes the thermal head L, white group sensor and cassette case S.
support. This support stand 6 is driven by a timing belt 7. This is the support rail that supports the support platform B. The carriage motor drives the timing belt 7 to move the support base 11. 10 is a paper feed m motor.

FIG. 2 shows an example of a civilian processing device using the printing device of the present invention, where // is a central processing unit Vfi (cPU), which controls writing and reading to/from memory/2, printing device section/ 3 and transfers print data. The memory/2 stores various control programs and document data. The printing device section/3 performs printing based on data sent from the CPU//. /lI is a data discrimination circuit which discriminates whether the data sent from cPU// is a character pattern signal S/ or a printer control signal 8.2.

Character patterning @ S / is once a pattern buffer /! is stored in Printer control signal S- is decoded by control signal decoder/B and pattern buffer control signal s3. Carriage motor FIilJ m number S+
and a paper feed control signal S. Each of the control signals S3 to St is sent to a pattern buffer /j, a carriage motor control circuit /g, and a paper feed motor control circuit /g, where printing operations and return/line feed operations are performed. Further, a blank sheet detection signal S6 from the reading sensor tag is output when a blank sheet is detected by the reading sensor tag, and is input to the control signal decoder /A. When the blank paper detection signal S6 is no longer output when the print sensor detects the printed area, the control signal decoder/B outputs various NIJ control signals S3 after waiting for the print head l to come to the position of the reading sensor at that time.
~SS is output, and the return change operation, paper feed operation, and gear ridge skip operation are performed. That is, the CPU
If operations such as carriage return, line feed, and skip are performed from // in accordance with instructions in the document data, the same operations will be performed when a printed portion other than blank paper is removed from the printing paper. Therefore, no printing is performed on the printing paper where there are preprinted characters, pictures, etc., and operations such as carriage returns and line feeds are performed to ensure that there are no unprinted characters, and the text is not disturbed.

Effects As explained above, according to the present invention, a blank page sensor is provided in the printing device section, and when a page other than a blank page is detected, the carriage return and line feed and swivel operations are automatically performed. This eliminates the need to redo the editing work, which has the effect of making it possible to perform the editing work more efficiently. Therefore, the efficiency of sentence'di processing work is greatly improved.

[Brief explanation of the drawing]

Figure 1 is an example of the configuration of the printing device of the present invention. The perspective view shown in FIG. 2 is a block diagram showing an example of the control circuit of the printing device. L...Thermal head, C...Ink ribbon, 3...Print paper, G...Blank paper sensor, R...Ink ribbon cassette, B...Support stand, R...Timing belt, and ...Support rail? ... Carriage motor, 10... Paper, feeding motor, //... CPU) /+2... Memory, /3... Printing part 1a, / G... Data discrimination circuit, / S...Pattern buffer, /A...Control signal decoder, /7...Gear ridge motor control circuit, 7g...Paper feed motor control circuit. Patent Kawahara) 1 person Canon Co., Ltd.

Claims (1)

[Claims] a printing head, a feeding mechanism for the printing head, a paper feeding mechanism for printing paper, a detection means for detecting whether or not a portion of the printing paper to be printed is blank, and a detection means for detecting whether the paper is not blank by the detection means. is detected, a control means for prohibiting printing and controlling the feeding mechanism or the paper slipping mechanism, and a control means for printing only on the blank portion of the printing paper where the blank paper is detected by the detection means. A printing device characterized by comprising a printing means for printing.