JPS58142869A - Thermo-sensitive recording method - Google Patents

Abstract

PURPOSE:To increase the speed of recording by a method wherein a light transmission type heating element and a power supply means to the heating element are set up between a light source for recording and a carrying path for thermo- sensitive paper, and the heating element is heated and thermo-sensitive paper is given thermal bias when thermo-sensitive paper is recorded. CONSTITUTION:The light transmission type heating element 3 such as conductive glass is set up along the carrying direction between the light source 1 for recording of light or infrared rays or the like and the carrying path for thermo- sensitive paper or a thermo-sensitive ink sheet 5, and connected to a power supply E for heating while a thermistor element 4 as a temperature detecting means is set up into the conductive glass 3, and the currents of the conductive glass 3 can be controlled ON-OFF by a comparator COM. The conductive glass 3 is supplied with currents from the power supply E for heatind and heated at a predetermined temperature, the thermo-sensitive paper 5 is given thermal bias while the thermo-sensitive paper 5 is given recording energy from the light source 1 for recording, and a recording picutre is recorded onto transfer paper 6.

Description

[Detailed Description of the Invention] Jin's invention relates to a thermal recording method used in recording devices such as facsimiles and printers, and improves the recording speed by using a low-energy light source such as light or infrared light energy in 411. It is applied to the thermal recording method.

Conventionally, as a recording device such as a facsimile, a thermal recording method is known in which optical energy such as light or infrared light is applied to thermal paper or an ink sheet to perform thermal recording or thermal transfer arrangement. In thermal recording methods such as
．． It requires energy of about 21 joules. However, the energy of light from ordinary lasers and LIDs is small.

Therefore, C's first thermal recording method solves this disadvantage of recording light energy and increases the recording speed. The aim is to improve

Therefore, in the thermal recording method of the present invention, between the recording light source and the conveyance path of the thermal paper or thermal ink sheet,
A heating element made of conductive glass or the like is disposed in the light-transmitting lid, and during a recording operation, by heating this heating element, a thermal bias is applied to the thermal paper or thermal ink sheet.

The drawing is a schematic diagram showing an example of the main part of a thermal transfer recording apparatus used when applying the thermal recording method of the present invention. Drawing [1, / is recording light source, ko is lens, 3
is conductive glass.

DA is the thermistor element, j'' is the heat-sensitive ink sheet, S is the film, jB is the ink layer applied to one side of the film, 6 is the transfer paper, γ is the roller, COM is the pump, and 8W is the switch. .

E indicates a heating power source, and a white arrow indicates the conveyance direction of the transfer paper 6.

Heat-sensitive ink sheet! is set between a transfer paper 6 and a conductive glass 3 such as Nesa glass.

When switch 8W is turned on before the start of recording operation,
A current flows through the conductive glass 3 from the heating power source I, and its temperature is increased. In this case, the temperature of the conductive glass 3 is controlled to be lower than the melting temperature of the ink layer 5B. For example, if the melting temperature of the normal ink layer tB is 90°C, a thermal bias of 30 to 0°C is set.

For this purpose, a thermistor element is provided inside the conductive glass 3 or at another appropriate position as a temperature detection means.

The resistance value of this thermistor element da is the comparator COM
The ink layer tB of the heat-sensitive ink sheet 5 is monitored by controlling the current of the conductive glass 3 on and off, and operates so that the thermal bias to the ink layer tB of the heat-sensitive ink sheet 5 is maintained within a predetermined range.

The recording light source generates light energy or infrared light energy.

During recording, light from the recording light source/light passes through the lensco, the conductive glass 3, and the film 5A of the heat-sensitive ink sheet S, and is directly absorbed by the ink layer SB. Therefore,
The ink layer 5B is heated, the ink is melted and transferred to the transfer paper B, and a calligraphic pattern is recorded.

The thermal ink sheet S and transfer paper 6 on which thermal recording was performed are
As the rollers rotate, they are sequentially fed in the direction of the self-arrow. , , In the above embodiments, the thermal transfer IE
# Although we have explained the device, there is a need for 1 for the thermal recording method.
Thermal ink sheet for drawings! The thermal paper may be supplied to the conveyance path of the transfer paper 1. In these recording devices, the temperature rise of the conductive glass is caused by the electric current, and its thermal response is not extremely fast, so temperature control is carried out by means of relays. It is sufficient to turn the current on and off; however,
It goes without saying that it is possible to configure the thermal recording method of the present invention so that a variable voltage is applied. A light-transmitting body such as conductive glass is provided between the conveyance path of the sheet and along the conveyance direction, and a power supply means is provided to heat the heat generating body. The heating element is heated to apply a thermal bias in a range S in which the coloring layer of the thermal paper is not sensitive to heat, or in a range in which the ink in the thermal ink sheet is not melted.

In the thermal recording method using a thermal head, it has been known since then that a thermal bias is applied to the platen roller facing the thermal head.

That is, since heating is performed from the back of the paper, it is difficult to accurately control the temperature of the color forming layer and the ink layer.

-This is KN
t, in the thermal recording method of this invention.

Using the heating element in the light-transmitting lid, a thermal bias is applied from the side where the light energy of the recording light source is irradiated.
It becomes possible to control the temperature easily and accurately. As explained in detail above, the thermal recording method of the present invention relates to a recording device that uses light or infrared light energy, and uses a recording light source and thermal paper or thermal ink.
between the sheet conveyance path.

A light-transmissive heating element is arranged along the transport direction.

Therefore, according to the thermal recording method of the present invention, it is possible to apply a thermal bias directly to the coloring layer of thermal paper or the ink layer of a thermal ink sheet, and the temperature can be easily and accurately controlled, and it also uses low energy. An excellent effect can be obtained in that high-speed recording operation can be performed even with a light source.

[Brief explanation of the drawing]

The drawing is a schematic diagram showing an example of a main part of a thermal transfer recording apparatus used in carrying out the thermal recording method of the present invention. In the drawings, / is a recording light source, C is a lens, 3 is a conductive glass, Da is a thermistor element, S is a heat-sensitive ink sheet, S is the film, SB is an ink layer coated on one side of the film SA, 6 indicates a transfer paper, and 7 indicates a roller.

Claims (1)

[Claims] In a recording apparatus that has a recording light source of optical or infrared type and performs thermal placement or thermal transfer recording from thermal paper or a thermal ink sheet, the recording light source and the conveyance path of the thermal paper or thermal ink sheet are In between, a light transmitting heating element is provided along the conveying direction, and a means for supplying power to this heating element is provided. A thermal recording method 0 characterized in that a thermal bias is applied to paper or a thermal ink sheet, and recording energy is applied from the image recording light source to the thermal paper or thermal ink sheet.