JPH05112021A - Multi-color heat-sensitive recording apparatus - Google Patents

Abstract

PURPOSE:To provide writability and impression-printability on a recording face of a multi-color heat-sensitive recording sheet in a multi-color heat-sensitive recording apparatus wherein a multi-color heat-sensitive recording sheet having a plurality of color developing layers is heat-sensitively recorded. CONSTITUTION:A pair of rollers 35 are positioned on the down stream side of a carrying system wherein a multi-color heat-sensitive recording sheet 12 is carried to a thermal head 38 and recessed and projected parts for forming a plurality of projections and recessions on the surface of the multi-color heat- sensitive recording sheet 12 are provided on the surface of one roller of the pair of the rollers 35 or a plurality of needle-like bodies for forming a plurality of fine holes are provided on the multi-color heat-sensitive recording sheet 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multicolor thermosensitive recording apparatus for recording characters, images and the like using a multicolor thermosensitive recording sheet having a plurality of color developing layers.

[0002]

2. Description of the Related Art In a facsimile, a printer or the like, a thermal recording device is widely used to visualize information such as characters and images. In this type of thermal recording device, a thermal recording sheet prepared by coating a color developing agent or a color developing agent on a support such as paper or synthetic paper is prepared, and this thermal recording sheet is heated by a thermal head based on an electric signal corresponding to an original or the like. Information such as characters and images carried on the original document is recorded as a visible image on the heat-sensitive recording sheet by heating and pressing.

By the way, in recent years, there are many demands for obtaining a color image which is color-coded into a desired color by a facsimile, a printer or the like. For this reason, in the prior art, a multicolor thermosensitive recording sheet in which color-developing layers that develop colors with different applied heat energies are laminated on a single support is used, and each of the multicolor thermosensitive recording sheets is subjected to recording means via recording means. A method of supplying heat energy corresponding to the color-developing layers to sequentially develop the color-developing layers is adopted.

[0004]

By the way, after information such as characters and images is heat-sensitively recorded on the multicolor heat-sensitive recording sheet,
There is a case where it is desired to add desired information to the recording surface of the multicolor heat-sensitive recording sheet, for example, using a pencil or the like, or to imprint using a seal or stamp. In this case, since the surface of the conventional thermosensitively recorded multicolor thermosensitive recording sheet is smooth, it is difficult to add to the recording surface of the multicolor thermosensitive sheet, and a clear imprint is obtained even when the mark is imprinted. There is an inconvenience that it cannot be obtained.

The present invention has been made to overcome the above-mentioned inconvenience, and a roller or a roller pair is arranged on the downstream side of a thermal head, and one or both rollers of the roller or the roller pair have a surface. By providing uneven parts or by attaching many needle-shaped bodies,
An object of the present invention is to provide a multicolor heat-sensitive recording apparatus capable of imparting writeability or imprintability to a heat-sensitively recorded multicolor heat-sensitive recording sheet.

[0006]

In order to achieve the above object, the present invention provides a multicolor thermosensitive recording sheet having a plurality of color forming layers on at least one surface side for recording characters, images and the like. A thermal recording device, wherein a roller or a roller pair is arranged on the downstream side of a transport system that transports the multicolor thermal recording sheet with respect to a thermal head, and one or both rollers of the roller or the roller pair has a surface. Providing a concavo-convex portion for forming a large number of irregularities on the surface of the multicolor thermosensitive recording sheet, or providing a large number of needle-shaped bodies for defining a large number of fine holes in the multicolor thermosensitive recording sheet. Characterize.

[0007]

In the above-described multicolor thermal recording apparatus according to the present invention, a roller or a roller pair is arranged on the downstream side of the thermal head, and an uneven portion is provided on the surface of one or both of the roller or the roller pair, or A multicolor thermosensitive recording sheet is provided with a large number of needle-shaped bodies for defining a large number of fine holes. Therefore, the multicolor thermosensitive recording sheet thermosensitively recorded by the thermal head is conveyed to the roller or the roller pair, and at the time of the conveyance, many irregularities are pressed on the surface of the multicolor thermosensitive recording sheet by being pressed by the uneven portion. A large number of fine holes are defined by a large number of needle-shaped bodies formed or attached to the roller. As a result, the former gives the retouchability and the latter gives the imprintability.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A multicolor thermal recording apparatus according to the present invention will be described in detail below with reference to the accompanying drawings.

First, description will be made of a case where a concavo-convex portion is provided on the surface of one roller of the roller pair so as to give the multicolor heat-sensitive recording sheet writability.

FIG. 1 is a schematic vertical sectional view of a multicolor thermal recording apparatus according to an embodiment of the present invention. In FIG. 1, the multicolor thermosensitive recording apparatus 10 includes a conveying mechanism 14 for conveying the multicolor thermosensitive recording sheet 12, and heat energy corresponding to a color forming layer of the multicolor thermosensitive recording sheet 12 which will be described later to supply each color forming layer. A recording mechanism 16 that sequentially develops colors, a pressure mechanism 18 that presses the recording mechanism 16 against the multicolor heat-sensitive recording sheet 12 at a desired pressure when recording is performed by the recording mechanism 16, The fixing mechanism 20 is provided on both sides of the mechanism 16. A plurality of multicolor thermosensitive recording sheets 1 are provided on one side of the main body 22 of the multicolor thermosensitive recording apparatus 10.
A magazine 24 accommodating 2 is detachably mounted, and a sheet take-out portion 26 is formed on the other end side of the main body 22.

The transfer mechanism 14 arranged in the main body 22 is
The multicolor thermosensitive recording sheet 12 is provided with a semi-circular take-out roller 28 that can enter the opening 24a of the magazine 24, a pair of conveying rollers 30 and 32, and a plurality of guide plates 34, and the multi-color thermosensitive recording sheet 12 is shown in the arrow A and arrow B directions. Transport to. Further, on the downstream side of the thermal head 38 and between the conveying roller pair 32 and the sheet take-out portion 26, a roller pair 35 having a large number of concave and convex portions 33 formed on the surface of one roller is arranged. ing.

The recording mechanism 16 is provided with a platen roller 36 and a thermal head 38. The thermal head 38 is provided with a heating element 40 as a thermal head main body facing the platen roller 36. Further, the pressure mechanism 18 is engaged with the thermal head 38, and the pressure mechanism 18 has a rocking plate 44. The rocking plate 44 receives the elastic force of a coil spring (not shown) and the platen roller 36. Pressed to the side. The thermal head 38 is mounted on the swing plate 44, and the locking portion 46 extends in the horizontal direction of the swing plate 44 in the drawing. An eccentric cam 48 comes into contact with the locking portion 46, and the eccentric cam 48 is fixed to the rotating shaft of a pulse motor (not shown). The fixing mechanism 20 includes fixing light sources 50 arranged on both sides of the thermal head 38.
52 and a reflector 54 for covering the fixing light sources 50, 52,
And 56.

The multicolor thermosensitive recording sheet 12 will be described below.

FIG. 2 shows a multicolor thermal recording apparatus 10 of this embodiment.
FIG. 3 is a schematic vertical cross-sectional view showing an example of the multicolor thermosensitive recording sheet 12 used for. In FIG. 2, the multicolor thermosensitive recording sheet 12
Has a paper or film base 62 coated with a back coat 60 for preventing bending at the lowermost layer.
On the upper surface of 2, color forming layers C, M and Y are formed in order of cyan, magenta and yellow. The back coat 60
Is provided in order to make the multicolor heat-sensitive recording sheet 12 versatile and to avoid a curving shape, that is, a curled state, when using a rotating drum (not shown) including, for example, a cylindrical roller. There is. A protective layer 64 is provided on the uppermost layer, and an intermediate layer 6 is provided between the color-developing layers C, M and Y.
6 is formed. As shown in FIG. 3, the coloring layers C, M, and Y show different coloring characteristics depending on the supplied heat energy, and the applied heat energy increases in the order of the coloring layer Y, the coloring layer M, and the coloring layer C. Is set.

Next, the operation of the multicolor thermal recording apparatus 10 configured as described above will be described.

First, when the thermal head 38 is preheated and the magazine 24 accommodating a plurality of multicolor thermosensitive recording sheets 12 is loaded into the main body 22 and the opening 24a thereof is opened, it is conveyed. The take-out roller 28 constituting the mechanism 14 is rotationally driven to take out the uppermost multicolor thermosensitive recording sheet 12 into the main body 22. The multicolor thermosensitive recording sheet 12 includes a pair of conveying rollers 30 and a guide plate 34.
It is conveyed to the recording mechanism 16 side via. Here, the short outer peripheral surface of the eccentric cam 48 engages with the oscillating plate 44 under the rotating action of a pulse motor (not shown) that constitutes the pressurizing mechanism 18,
The heating element 40 of the thermal head 38 is the platen roller 36.
Away from. Then, when the multicolor thermosensitive recording sheet 12 is inserted between the thermal head 38 and the platen roller 36, the eccentric cam 48 is moved by a predetermined angle under the driving action of a pulse motor (not shown) that constitutes the pressing mechanism 18. The outer peripheral surface of the thermal head 38 is rotated and abuts against the rocking plate 44 and rocks toward the platen roller 36, and the heating element 40 of the thermal head 38 presses the multicolor thermosensitive recording sheet 12 toward the platen roller 36 with a predetermined pressing force. At that time, the heating element 40 of the thermal head 38 supplies the heat energy corresponding to the color-developing layer Y to the multicolor thermosensitive recording sheet 12, whereby the color-developing layer Y is colored.
Next, after the multicolor thermosensitive recording sheet 12 is transferred in the direction of arrow A through the transport mechanism 14 and the recording mechanism 16 performs the color development of the color development layer Y, the fixing light source 52 of the fixing mechanism 20 is operated. The fixing action is applied to the color forming layer Y under the biasing action. Then, after the coloring operation of the coloring layer Y is completed, the multicolor thermosensitive recording sheet 12 is conveyed in the direction of the arrow B via the pair of conveying rollers 32 constituting the conveying mechanism 14, and the coloring operation of the coloring layer M is performed. Then, the fixing light source 50
After the fixing operation of the color forming layer M is performed, the multicolor heat-sensitive recording sheet 12 is conveyed again in the direction of the arrow A to perform the color forming operation of the color forming layer C, and the heat recording operation of the desired multicolor is completed.

The multicolor thermosensitive recording sheet 12 on which desired information is thermosensitively recorded is conveyed in the direction of arrow A through the conveying roller pair 32 and comes into contact with the roller pair 35. On the surface of the roller above the roller pair 35, an uneven portion 33 having a large number of unevenness is formed, and when the multicolor thermosensitive recording sheet 12 is conveyed, it is pressed by the uneven portion 33 and the multicolor thermosensitive recording sheet 12 is formed. Many irregularities are formed on the surface of. Therefore, for example, it becomes possible to add desired information using a writing instrument such as a pencil. In this way, it is possible to easily write characters, figures, etc. on the recording surface of the multicolor thermosensitive recording sheet 12. With regard to the shape of the uneven portion 33, it is preferable that the distance from the bottom of the recess to the top of the projection and the distance between the bottoms of adjacent recesses and the distance between the tops of the projections are 0.1 to 10 μm, respectively.

Finally, the multicolor thermosensitive recording sheet 12 is carried out to the sheet taking-out portion 26 via the roller pair 35.

Next, description will be made on a case where the multicolor heat-sensitive recording sheet on which heat-sensitive recording is performed is provided with imprintability. Note that FIG.
The same components as those of the above are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 4 is a schematic vertical sectional view of the multicolor thermal recording apparatus 70. In the multicolor thermal recording apparatus 70, the multicolor thermal recording apparatus 70 is located downstream of the thermal head 38 between the conveying roller pair 32 and the sheet take-out portion 26. A roller pair 72 is arranged, and a large number of needle-shaped bodies 74 are attached to the surface of the roller above the roller pair 72. After the coloring work is completed via the heating element 40 of the thermal head 38 and the fixing light sources 50 and 52, the multicolor thermosensitive recording sheet 12 is brought into contact with the roller pair 72 via the transport roller pair 32. Therefore, when the multicolor heat-sensitive recording sheet 12 is conveyed by the roller pair 72, it is perforated by a large number of needle-shaped bodies 74 attached to the surface of the roller arranged above the roller pair 72. Due to the perforations, a large number of fine holes are defined on the surface of the multicolor thermosensitive recording sheet 12. The multicolor thermosensitive recording sheet 12 is perforated by the needle-shaped body 74.
The shape of the needle hole is defined by 10-100μ in diameter.
It is preferable that m and the density of needle holes are 100 to 1000 holes / mm ² . Therefore, for example, when stamping a seal,
Ink or the like forming a seal imprint permeates the fine holes, and a clear seal imprint can be formed. Other configurations and operations are the same as those in the case of additionality, and therefore detailed description thereof will be omitted.

[0021]

According to the multicolor thermal recording apparatus of the present invention, the following effects can be obtained.

That is, a roller or a roller pair is arranged on the downstream side of the thermal head, and an uneven portion is provided on the surface of one or both rollers of the roller or roller pair, or a large number of fine color thermosensitive recording sheets are provided. By attaching a large number of needle-shaped bodies for defining the holes,
It is possible to add writing property and imprintability to the recording surface of a multicolor heat-sensitive recording sheet on which heat-sensitive recording has been performed.

[Brief description of drawings]

FIG. 1 is a schematic vertical cross-sectional view of a multicolor thermosensitive recording apparatus in the case of giving a writing property.

FIG. 2 is a schematic vertical sectional view of a multicolor thermosensitive recording sheet.

FIG. 3 is a schematic view of the multicolor thermosensitive recording sheet shown in FIG.
FIG. 9 is a characteristic curve diagram showing a relationship between thermal energy and image density relating to magenta and cyan color development characteristics.

FIG. 4 is a schematic vertical cross-sectional view of a multicolor thermal recording apparatus in the case of giving imprintability.

[Explanation of symbols]

 10, 70 ... Multicolor thermal recording device 12 ... Multicolor thermal recording sheet 16 ... Recording mechanism 30, 32 ... Conveying roller pair 33 ... Convex portion 35, 72 ... Roller pair 36 ... Platen roller 38 ... Thermal head 40 ... Heating element 74 … Needles

Claims (4)

[Claims] 1. A multicolor thermosensitive recording apparatus for recording characters, images and the like using a multicolor thermosensitive recording sheet having a plurality of color forming layers on at least one surface side, wherein the multicolor thermosensitive recording is performed on a thermal head. A roller or a roller pair is arranged on the downstream side of the conveying system for conveying the sheet,
A multicolor thermosensitive recording apparatus, wherein one or both of the rollers or a pair of rollers is provided with an uneven portion for forming a large number of irregularities on the surface of the multicolor thermosensitive recording sheet. 2. The device according to claim 1, wherein the distance between the bottom of the concave portion and the top of the convex portion formed in the concave and convex portion, and the distance between adjacent convex portions or concave portions are 0.1 to 10 μm, respectively. A multicolor thermal recording device characterized by. 3. A multicolor thermosensitive recording apparatus for recording characters, images, etc. using a multicolor thermosensitive recording sheet having a plurality of color forming layers on at least one surface side, wherein the multicolor thermosensitive recording is performed on a thermal head. A roller or a roller pair is arranged on the downstream side of the conveying system for conveying the sheet,
A multicolor heat-sensitive recording apparatus, wherein a plurality of needle-shaped bodies for defining a large number of fine holes in the multicolor heat-sensitive recording sheet are attached to the surface of one or both of the rollers or a pair of rollers. .. 4. A multicolor thermal recording apparatus according to claim 3, wherein the diameter of the fine holes is 10 to 100 μm and the density is 100 to 1000 holes / mm ² .