JPS5970079A - Printing and recording device - Google Patents

Abstract

PURPOSE:To read out printed data clearly by supplying printing data to a printing part at regular array when selecting regular printing, and at the selection of reversal printing, reversing the array of the printing data and then supplying the reversed data to the printing part. CONSTITUTION:When the operator sets up normal paper on a printing and recording device and turns on a switch 1 at the printing on the normal paper, regular print appears on the normal paper. If the operator sets up an over head projector (OHP) film and turns on the switch 1 at the printing on the OHP film, the printing data are supplied to a shift register 3. When a printing start button is depressed, data from a CPU are set up in respective bits X1-Xn, a clock pulse cp is supplied to shift registers 3, 8 and the respective bits X1-Xn are set up in respective bits Y1-Yn of the register 8. The contents of the register 8 are supplied to a thermal head 10 and each one dot line is printed successively, so that reversed characters are printed out on the OHP film.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printing and recording device that prints on plain paper and OHP (overhead projector) film.

In recent years, automatic office equipment (OA) equipped with a CRT (cathode ray tube display) has become rapidly popular, and along with this, devices that make hard copies of CRT images are also becoming increasingly popular. In particular, copying on plain paper has already been widely adopted, and hard copying on OHP film is also becoming increasingly popular.

By the way, when transferring to an OHP film, it cannot be transferred to a normal film. That is, since the surface of the film is smoothly finished, even if the transfer ink is applied (transferred), it will come out clearly, but there will be no ink unevenness or transfer failure. Therefore, the film is subjected to matte treatment to ensure perfect ink transfer to the film.

That is, a process is performed in which a solvent is applied to the film surface to create irregularities on the surface. Although this reduces the transparency of the film, it does not affect the image quality when projected using OHP.

By the way, it is printed on the matte film surface and it is mysterious.
When directly viewing characters or images (hereinafter simply referred to as characters) for proofreading or preliminary inspection, they should be viewed from the front (printed side) and from the back (smooth, unprinted side). There will be a difference in the clarity of the characters depending on the time. That is, when viewed from the back side, the characters appear clear, as shown in Figure 1 (B), but when viewed from the front side, they appear blurred, as shown in Figure 1 (B). Therefore, the above-mentioned conventional printing method has the disadvantage that the characters printed on the IP film [:IJ] are very difficult to read.

This invention takes into account the above-mentioned circumstances and provides a printing and recording device that can print clear and easy-to-read characters on OHP film. It is characterized by

More specifically, this invention was made based on the fact that characters printed on an OHP film can be seen clearly when viewed from the back, as shown in Figure 2 (A).
As shown in FIG. 3, the letters are inverted and printed in mirror form in advance so that they can be read from the back side as shown in FIG.

An embodiment of the present invention will be described below based on the drawings.

FIG. 3 is a block diagram showing the configuration of the main parts of the printing and recording device according to the present invention. This is a manual switch for printing on plain paper, and off when printing on OHP film.When this switch 1 is on, OV (
1o*signal) is off, 5V ('1' signal) is supplied to the inverter 20 input terminal. The output of the inverter 2 is supplied to the mode control input terminal SL of the right-left shift type shift register 3, the input terminal of the impark 40 input terminal, and the input terminal of the Nantes gate 5a. This mode control input terminal SL is for enabling the shift register 3 to shift to the left when the 111 signal is supplied (that is, when the switch 7 is on). Further, the output terminal of the inverter 4 is supplied to the mode control input terminal SR of the shift register 3 and the input terminal of the Nant gate 6a. This mode control input 4 child S
R is for enabling the shift register 3 to write shift when the '11 signal is supplied (that is, when switch 1 is off). Next, print data for one dot line is supplied to the parallel input terminal of the shift register 3 from a central processing unit (C)'U (not shown).
Each bit X1. X2...Set to Xn. In addition, a clock pulse CP is supplied to the clock terminal CK, and each bit X1, X2, . . . of the shift register 3 is supplied with a clock pulse CP.
Shift the contents of X-engine to the right or left. Furthermore, the output from the left output terminal LO of the shift register 3 is input to the input terminal of the NAND game) 5a, and the right output terminal R, 0
The output from the Nant gate is sent to the Nant gate, and the output of the Nant gate 5a is sent to the inverter 5b.
In addition, the output of the NAND game) 6a is supplied to the input terminal of each h OR gate 7 via an inverter 6b.
The output of is supplied to the input terminal 8a of the shift register 8. Note that the NAND game) 5a and the inverter 415b constitute an AND gate 5, and the NAND gate 6a1 and inverter 6b constitute an AND gate 6. On the other hand, the shift) L/register has bits Y1, IY2, . . ., Yn, and each bit Y□.

The outputs of Y2...Yn are sent to each heating element H,, H2... of the thermal head 10 via the head driver 9.
・H.

supplied to i! In addition, when the clock pulse CP is not fully supplied to the clock terminal CK of the shift register 8, each bit Y1 . Write shift the contents of Y2...Yn.

In such a configuration, when printing on plain paper, when the operator sets plain paper in the printing and recording device and turns on switch 1, the 11' signal is supplied to the mode control input terminal: ISL, and the shift register 3 can be shifted to the left, and the AND gate 5 is opened. Then, when the operator presses the print start button (not shown) □, printing control is started, and print data is supplied from the CPU to the shift register 3, and each focus point X □, X2...Xn
is set to Then, when the clock pulse CP is supplied to shift 1/sisters 3 and 8, shift register 3 starts a left shift, and shift register 8 starts a right shift, starting from the contents of bit
1...The contents of Xo are sequentially transferred to the shift register 8 via the AND gate 5 and the OR gate 7. Then, bit Yn contains the contents of bit Xn, bit Yn-1
The contents of bits Xn, , □ are set to h, and the contents of bit X□ are set to bit Y. In this way, print data is stored in shift register 8! When processed, each bit Y1. Y2...Yn contents are head driver 9
It is supplied to the thermal head 10 via the printer, and one dot line is printed. Below is one step using the same steps.
Trines are printed one by one, and regular printing is done on plain paper.

When printing on next[, O:E(P film), the bar author sets the 0T(P film on the printing/recording device and turns off switch 1, the -11 signal is supplied to the mode control input terminal SR, The shift register 3 becomes capable of write shifting, and the AND gate 6 becomes open.

Then, when the operator presses the print start button, print control starts and print data is supplied from the CPU to the shift register 3, and each bit X1. Set to X2...Xn. Then, when the clock pulse CP is supplied to shift registers 3 and 8, both shift registers 3 and 8 start write shifting, and starting from the contents of bit X0, the contents of bits X2... 7 to the shift register 8. and - bit Yn has bit X1
The contents of bit Yn-□ are the contents of bit X2,
. . . Bit Y1 is set with the contents of the bits. When the print data is set in the shift register 8 in this way, each bit Y1. Y2...Yn
The contents of are transferred to the thermal head 10 via the head driver 9.
is supplied to print one dot line. below,
Dot lines are printed one by one using the same steps, and OHP
The inverted characters are printed on the film. This is because when the print data is transferred from the shift register 3 to the shift register 8, the arrangement of the print data is reversed. Then, the reversed printed characters are printed on the OHP.
When visually inspected from the back of the film, it can be read correctly and clearly.

As explained above, in this invention, since the characters are inverted beforehand and printed on the ONP film at the time of printing, an advantage is obtained that the characters can be clearly read when viewed from the back side.

[Brief explanation of the drawings] Figure 1 (a) is a diagram of characters printed on an OHP film by a conventional printing and recording device, viewed from the surface;
The same figure ←) is a diagram when the above characters are visually observed from the back side,
Figure (a) is a diagram when characters printed on an OHP film by the printing and recording device according to the present invention are viewed from the front side, and Figure (b) is a diagram when the characters are viewed from the back side,
FIG. 3 is a block diagram showing the configuration of essential parts of the printing and recording apparatus according to the present invention. 1... Switch (selection means), 3.8... Shift register (reversing device), 9... Head driver (printing section), lO... Thermal head ( Printing Department). Applicant Shinko Electric Co., Ltd. Agent Patent Attorney Masatake Shiga. Figure 1 Figure 2 (a) (b)

Claims (1)

[Claims] a selection means for selecting and specifying whether to print the print data normally or inverted and printed in a bell letter shape; and when the selection means selects the normal printing, the print data is printed in the normal arrangement on the printing section; and a reversing device that inverts the arrangement of the print data and supplies it to the printing section when reverse printing is selected.