JPH05270056A - Double side printing method of printer - Google Patents

Abstract

PURPOSE:To enable double side printing of a printing medium to be carried out without inverting the printing medium by a method wherein printing is performed by inserting a separating sheet only to either of a front side or a rear side of the printing medium. CONSTITUTION:When printing is performed on a front side surface of a printing medium 10, a separating sheet 7 is inserted only between a rear surface of the printing medium 10 and an ink ribbon 3. Then, ink is transferred from an ink ribbon 3a in a going direction of a front surface to the front side surface of the printing medium 10, and printing is performed. Besides, when printing is performed on the rear surface of the printing medium 10, a separating sheet 6 is inserted only between the front side surface of the printing medium 10 and the ink ribbon. Then, the ink is transferred from an ink ribbon 3b in a return direction on a rear side to the rear side surface of the printing medium 10, and printing is performed. Since an opening between the ink ribbon 3a in the going direction on the front side and the front side surface of the printing medium 10 is separated with the separating sheet 6, printing is not performed on the front side surface of the printing medium 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-sided printing method for a printer for printing on both front and back sides of a print medium.

In recent years, the demand for directly printing on both front and back surfaces of a single print medium has been increasing.

[0003]

2. Description of the Related Art To print on both front and back sides of a print medium,
Conventionally, after printing on one side of a print medium, the front and back sides of the print medium are reversed, and then the other side is printed.

[0004]

However, in order to invert the print medium upside down in the printer, a complicated and large device is required, and the size of the device becomes extremely large, and the cost of the device becomes significantly high. There was a flaw.

Therefore, it is an object of the present invention to provide a double-sided printing method for a printer which is capable of double-sided printing with a small and simple device.

[0006]

In order to achieve the above object, a double-sided printing method for a printer according to the present invention, as shown in FIG. 180 degrees to reverse the forward and backward directions of the ink ribbons 3a and 3b between the print head 2 and the platen 1, and the printing medium between the forward and backward directions of the ink ribbons 3a and 3b. 10 is arranged, and isolation sheets 6 and 7 for separating the forward and backward ink ribbons 3a and 3b and the print medium 10 are detachably provided, and the front side of the print medium 10 is provided. When printing on the surface 10a, the isolation sheet 7 is inserted only on the back side of the print medium 10, and the surface 1 on the back side of the print medium 10 is inserted.
When printing on 0b, the isolation sheet 6 is inserted only on the front side of the print medium 10.

[0007]

When the front surface 10a of the print medium 10 is printed, the separating sheet 7 is inserted only between the back surface 10b of the print medium 10 and the ink ribbon 3.

Then, the ink ribbon 3a in the forward direction on the front side
The ink is transferred from the front surface 10a of the print medium 10 to perform printing. The back side ink ribbon 3b and the back surface 10b of the print medium 10 are separated by the separating sheet 7, so that the back surface 1 of the print medium 10 is separated.
It is not printed on 0b.

When printing on the back surface 10b of the print medium 10, the separating sheet 6 is inserted only between the front surface 10a of the print medium 10 and the ink ribbon 3.

Then, the backward ink ribbon 3b on the back side.
Ink is transferred to the back surface 10b of the print medium 10 to perform printing. Since the front side ink ribbon 3a and the front side surface 10a of the print medium 10 are separated by the separating sheet 6, the front side surface 1 of the print medium 10 is separated.
It is not printed on 0a.

[0011]

Embodiments will be described with reference to the drawings.

FIG. 1 schematically shows a double-sided printer device to which the present invention is applied. In the figure, reference numeral 1 denotes a platen, and an impact dot type print head 2 mounted on a carriage (not shown) is driven by a space motor (not shown) to reciprocate along the platen 1.
A print control unit 9 sends a print signal for controlling the print operation of the print head 2.

The ink ribbon 3 makes a U-turn along the U-turn roller 4 on the way, and the feeding direction is reversed by 180 degrees here. The ink ribbon 3 is of a type that is used repeatedly by impregnating a base cloth with an oil-based ink, and runs endlessly when the ribbon feed roller 5 rotates.

The forward ink ribbon 3a and the backward ink ribbon 3b both run between the print head 2 and the platen 1, and the forward ink ribbon 3a and the backward ink ribbon 3b. In the meantime, the print sheet, which is the print medium 10, runs.

Between the ink ribbon 3a in the forward direction and the printing medium 10 and between the ink ribbon 3b in the backward direction and the printing medium 10, a soft thin synthetic resin film is formed to form the ink ribbon 3. Separation sheets 6 and 7 for separating the print medium 10 so as not to come into direct contact with the print medium 10 are removably arranged. The insertion / removal of the isolation sheets 6 and 7 is driven by the sheet insertion / removal motor 8 shown in FIGS.

Although there are only small gaps between the ink ribbon and the separating sheets 6 and 7, and between the separating sheets 6 and 7 and the print medium 10, for the sake of clarity, each figure is not shown. In the drawing, a large gap is provided between each member.

When printing is performed on the front surface 10a of the print medium 10 using the double-sided printer as described above, as shown in FIG. 2, the back surface 10b of the print medium 10 and the ink ribbon in the backward direction are printed. The print head 2 is caused to perform a printing operation in a state where only the back side separating sheet 7 located between the print medium 10 and the ink ribbon 3 is inserted between the print medium 10 and the ink ribbon 3.

Then, the ink is transferred from the ink ribbon 3a in the forward direction to the front surface 10a of the print medium 10 to perform printing. Backward ink ribbon 3b and print medium 10
Since the back side surface 10b is separated from the back side surface 10b by the back side separating sheet 7, the back side surface 10b of the print medium 10 is not printed.

When printing on the back side 10b of the print medium 10, as shown in FIG. 3, the front side separation sheet between the front side 10a of the print medium 10 and the ink ribbon 3a in the forward direction. 6 only print medium 10 and ink ribbon 3
The print head 2 is caused to perform a printing operation in a state in which the print head 2 is inserted between the print head 2 and the print head 2.

Then, the ink is transferred from the backward ink ribbon 3b to the back surface 10b of the print medium 10 for printing. Ink ribbon 3a and print medium 10 in the forward direction
Since the front side surface 10a of the print medium 10 is separated from the front side surface 10a, the front side surface 10a of the print medium 10 is not printed. However, when printing is performed on the back side in this way, a print signal in which the characters are reversed horizontally is output from the print control unit 9 to the print head 2.

[0021]

According to the double-sided printing method of the printer of the present invention, double-sided printing can be performed on the print medium by simply inserting and removing the separating sheet without reversing the print medium, so that the size is very small and low. It has an excellent effect that double-sided printing can be performed with a cost device.

[Brief description of drawings]

FIG. 1 is a schematic view of the configuration of an embodiment.

FIG. 2 is a front side printing state diagram.

FIG. 3 is a back side printing state diagram.

[Explanation of symbols]

 1 Platen 2 Printhead 3 Ink Ribbon 3a Forward Ink Ribbon 3b Backward Ink Ribbon 6 Front Separation Sheet 7 Back Separation Sheet 10 Printing Medium

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location G06F 3/12 P

Claims (1)

[Claims] 1. An ink ribbon (3) is fed in the midway direction 1
Invert by 80 degrees to move the ink ribbon (3
a, 3b) are both fed between the print head (2) and the platen (1), and the print medium (10) is arranged between the forward and backward ink ribbons (3a, 3b). Separation sheets (6, 7) for separating the forward and backward ink ribbons (3a, 3b) and the print medium (10) are detachably provided, and the print medium (10) When printing on the front side (10a), the isolation sheet (7) is inserted only on the back side of the print medium (10), and the back side (10b) of the print medium (10) is printed. In this case, the double-sided printing method for a printer is characterized in that the isolation sheet (6) is inserted only on the front side of the print medium (10).