JPS6178680A - Transfer-type thermal recorder - Google Patents

Abstract

PURPOSE:To obtain a transfer-type thermal recorder capable of making it impossible to read recorded information from a used ink donor sheet (IDS) and thereby preventing the recorded information from leaking, by applying a hiding agent to a heat-sensitive ink layer of an IDS passed through a thermal recording head. CONSTITUTION:A guide roll 12 and a take-up roll 3 are provided on the IDS1 discharging side of a recording part 4 consisting of a back-up roll 5 and a thermal head 6, and the used IDS1 is fed in the direction of an arrow and is taken up by the roll 3. On the other hand, a recording sheet 11 is released from the IDS1, and is discharged to the exterior of the recorder. Between the guide roll 12 and the take-up roll 3 are provided a corotron 7 for negatively charging the surface of a heat-sensitive ink layer of the used IDS1, a developing unit 8 for applying a positively charged toner having the same color as that of the ink layer onto the surface of the ink layer, and a pressure fixing unit 9 for fixing the applied toner to the surface of the ink layer, whereby the information left on the used IDS1 is hidden by the toner.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a transfer-type thermal recording device that performs thermal transfer recording on a recording sheet using an ink donor sheet (in particular, a transfer type thermal recording device that can prevent leakage of recorded contents). type thermosensitive recording device (related to this).

[Conventional technology]

Conventionally, in a transfer type thermal recording device, as shown in FIG.
The recording sheet (a) such as paper is transferred to the ink donor sheet f.
The thermal ink layer formed on the recording section (elfc is fed and the above ink donor) (blt is overlaid with the blt) is selectively applied (this) according to the recorded image information using a thermal head (d). Heat-sensitive recording is performed by melting or sublimating and transferring it to a recording sheet.

As shown in FIG. 3, the ink donor sheet (b) used in this transfer type thermal recording device is formed on the base sheet (e) and the surface thereof, and is heat-fusible or heat-sublimated. It was composed of a heat-sensitive ink layer (fl) in which colored pigments or dyes were dispersed in a transparent binder.

[Problem that the invention seeks to solve]

Therefore, the used ink donor notebook (blikoha!
I! As shown in Figure J3, the thermal ink layer (fl) that was not transferred (Recording Half) remains, so the ink donor sheet (bl and recording no) after recording is
At is a relationship between a photographic negative and a positive, and is preferable from the viewpoint of confidentiality because the recorded content can be easily read from the used ink donor sheet (b) left in the transfer type thermal recording device. It wasn't.

[Means and effects for solving the problem] The present invention has been made in view of the above-mentioned circumstances, and it is concerned that recorded contents cannot be read from a used ink donor sheet, thereby preventing leakage of recorded contents. It is an object of the present invention to provide a transfer type thermal recording device that can prevent the above problems.

That is, the present invention provides a supply means for supplying an ink donor sheet having a heat-sensitive ink layer formed by dispersing a colored pigment or dye in a heat-melting or heat-sublimable binder, and an ink donor sheet fed from the supply means. The ink donor sheet is brought into contact with the ink donor sheet, and the ink donor sheet is selectively heated according to the recording image information, and the heat-sensitive ink layer is transferred onto the recording sheet that is in contact with the sheet, thereby performing thermal recording. In a transfer type thermal recording device comprising a recording head and a recovery means for recovering the ink donor that has passed through the thermal recording head, the thermal ink of the ink donor sheet is removed between the thermal recording head and the recovery means. By disposing an adhering means for adhering a multi-layered obscuring material, the obscuring material is applied to the used ink donor sheet, thereby making the recorded contents unreadable.

〔Example〕

Embodiment 1 of the present invention Referring now to the drawings, a transfer type thermal recording apparatus according to the present invention is illustrated in FIG. 2), a take-up roll (3) for collecting the used ink donor saw 1j, and each of these rolls (21 (3)
A back roll (5) and a thermal head (6) which are provided between 1 and 2 and which form a recording section (4), and a toner which is a masking material on the surface of the used ink donor sheet (1). Charger (7) and developer (8) for attaching
, and a fixing device (9).

First, the supply roll (2) is mounted on a shaft so that it can rotate in the direction of the arrow, and feeds the wound ink donor notebook (1) to the recording section (4) via the guide roll OG. In addition to this configuration, this recording section (4)
ζ is configured such that the recording sheet 011 is also fed by a mechanism t (not shown), superimposed on the ink donor sheet (1).

The recording unit (4) is comprised of a back roll (5) rotatable in the direction of the arrow and supported by a roller, and a thermal head (6) that partially generates heat in response to recorded image information. The back roll (5) is formed so as to be pressed against the thermal head (6) with an appropriate pressure by a mechanism not shown.

Further, on the ink donor sheet (1) discharge side of the recording section (4), a guide roll (121) and a take-up roll (3) are both disposed on a rosette bearing rotatable in the direction of the arrow. The used ink donor sheet (1) is conveyed in the direction of the arrow and collected by the take-up roll (3), while the recording sheet (1) is transported by a mechanism (not shown). The ink donor is configured to be discharged from the ink donor to the outside of the apparatus consisting of the ink donor (-1).

and a Flotron charger (7) that passes between the guide roll (12+) and the take-up roll (3) and negatively charges the heat-sensitive ink layer surface of the used ink donor sheet (1);
A developing device (8) that attaches a positively charged toner of the same color as this ink layer to this thermal ink layer surface 1, and a pressure fixing device (9) that fixes this toner to the thermal ink layer surface 1. The transfer type heat-sensitive recording device of the present invention is constituted by this arrangement.

As described above, in the transfer type thermal recording device of the present invention, the toner of the same color as the ink layer is attached to and collected on the thermal ink layer surface of the ink donor sheet (1) after use. Later ink donor sheet (1)
Even if the sheet (1) is discarded, the information left on the sheet (1) is hidden by the toner and becomes unreadable, so that its leakage can be prevented.

In the above embodiment, a corotron charger is used as the charger (7), but this is replaced with an insulator roll that is placed in pressure contact with the thermal ink layer surface of the used ink donor sheet (1). A structure in which the surface of the heat-sensitive ink layer is charged by one frictional charge (it may also be rubbed).

Further, the ink donor sheet (1) has a guide roll U.
(2) In a device in which the amount of charge increases due to contact with the u7J, the thermal head (6), etc., and is charged by this friction, the above-mentioned charger (7) may be omitted.

Furthermore, in the above embodiment, toner is attached to the surface of the heat-sensitive ink layer of the used ink donor sheet (1) using an electrostatic method ζ to hide information left on the sheet (1). However, instead of this method, the heat-sensitive ink layer surface of the sheet (1) is coated with a colored paint as appropriate, such as a spray method, a coating roll method, etc., to hide the above information. If necessary, a colored sheet may be laminated on the surface of the heat-sensitive ink layer of the used ink donor sheet (1) to hide it.

〔Effect of the invention〕

As described above, the present invention provides a supply means for supplying an ink donor sheet, a thermal recording head that transfers the thermal ink layer of the ink donor sheet onto a recording sheet, and a collection of the ink donor sheet that has passed through the thermal recording head. In the transfer type thermal recording apparatus, an adhesion means for adhering a masking material onto the thermal ink layer of the ink donor sheet is disposed between the thermal recording head and the recovery means. Therefore, used ink donor sheets are
The heat-sensitive ink layer is covered by the masking material and recovered.

Therefore, the information left on the ink donor sheet after use is hidden from the above-mentioned concealing material vessel and becomes unreadable, which has the effect of preventing leakage of the above-mentioned information.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a transfer type thermal recording device according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of a conventional transfer type thermal recording device, and FIG. 3 is an explanatory diagram of this device (ink donor sheet used in this device). It is a sectional view. [Explanation of symbols]

Claims (1)

[Claims] A supply means for supplying an ink donor sheet having a heat-sensitive ink layer formed by dispersing a colored pigment or dye in a heat-melting or heat-sublimable binder, and an ink donor sheet fed from the supply means. selectively heating the ink donor sheet in accordance with the recorded image information;
a thermal recording head that performs thermal recording by transferring the thermal ink layer onto a recording sheet that is in contact with the sheet;
In a transfer-type thermal recording apparatus including a collecting means for collecting the ink donor sheet that has passed through the thermal recording head, a portion of the ink donor sheet on the thermal ink layer of the ink donor sheet is disposed between the thermal recording head and the collecting means. 1. A transfer type heat-sensitive recording device, characterized in that an adhering means for adhering a concealing material is provided.