JPS61283582A - Negative image eliminator for idf - Google Patents

Abstract

PURPOSE:To enable negative images to be eliminated or deformed, by a method wherein a used ink donor film (IDF) is heated by a heater or the like and the heated surfaces of the IDF are rubbed on each other. CONSTITUTION:The used IDF 11 is passed through a lower part of guide roll 12, the upper surface of a guide plate 13 and a lower part of a guide roll 14, is wrapped around a turn-roll 15 by a half of the circumference, and is passed through the guide plate 13 to be taken up by a take-up reel 16. On the surface of the guide plate 13, the ink surfaces of two portions of the IDF 11 are faced to each other. The turn-roll 15 and the take-up reel 16 are driven to rotate respectively in the directions of arrows by a motor or the like, and a heater 17 is energized. By this processing, the upper side portion and the lower side portion of the IDF 11 passed on the guide plate 13 are moved in opposite directions while being heated by the heater 17, whereby the ink surfaces of the two portions of the IDF 11 are rubbed on each other. As a result, the ink layers are fused to each other, or shearing is continuously caused, whereby the negative images left on the IDF 11 are broken, and the printed information can be prevented from being read from the IDF 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an IDE negative image erasing device that is capable of erasing a negative image left on a used IDF or rendering it unreadable.

[Background technology]

As a conventional thermal transfer printer, for example, there is one shown in FIG. 3, in which an ink donor film (hereinafter referred to as IDF) 1 with ink applied to one side of the film base and a predetermined length of IDPI are wound. The DF roll 2, the take-up reel 3 that winds up the used IDPI, and the heating resistor that is installed in the middle of the conveyance path of the IDF roll 2 and contacts the non-ink surface of the IDF roll 2 according to the image information. The thermal head 4 is driven by a thermal head 4, and a platen 6 presses a recording paper 5 against the surface of the head 4 while overlapping the IDFI on the ink surface.

In the above configuration, the ID'FI and the recording paper 5 are conveyed in a superimposed manner, and the heating resistor of the thermal head 4 is driven based on the image information to heat the ink of the IDFI and adhere to the recording paper 5 (transfer). Printing is then performed.

[Problem that the invention seeks to solve]

However, in conventional thermal transfer printers, used IDFs on which negative images have been formed are often left unprocessed, so their contents can be easily read and kept confidential. There is a problem in which it is not possible to maintain it.

[Means and effects for solving the problem] The present invention has been made in view of the above, and is designed to destroy the negative image formed on the IDF in an undecipherable manner.
The present invention provides an IDF negative image erasing device in which the negative surface is erased or deformed by heating it with a heater or the like and rubbing the heated surfaces together.

〔Example〕

Hereinafter, the IDF negative image erasing device according to the present invention will be explained in detail.

FIG. 1 shows an embodiment of the present invention, which includes a guide roll 12 that guides TDFII pulled out from a used IDF roll 10, and a state in which the IDFII is placed on the upper surface while being guided by the roll 12 (described later). a guide plate 13 that heats the IDFII by receiving heat from a heater; a guide roll 14 that guides the IDFII from the plate 13; a turn roll 15 that returns the IDFII from the roller 14 to the surface of the guide plate 13; roller 1
I returned from 5 and passed over the guide plate 13 surface.
A take-up reel 16 for winding DFII and a guide plate 1
It is composed of a heater 17 that heats the heater 3, and a case 18 that houses the heater 17.

In the above configuration, from the used TDF roll 10,
Pull out the DFII, pass it through the lower part of the guide roll 12, and then pass it over the guide play 13 surface to the guide roll 1.
4 and the turn roll 15 to make a half turn, and then wind it around the take-up wheel 16 via the guide plate 13. On the surface of the guide plate 13, the two IDFII strips are arranged so that their ink surfaces face each other. After the loading of the IDF II is completed, the turn roll 15 and the take-up roll 16 are each driven in the direction of the arrow in the figure by a motor or the like, and the heater 7 is energized. As a result, both the upper and lower sides of the IDFII passing over the guide plate 13 are heated by the heater 17 while traveling in different directions, and in the process, the ink surfaces of the two IDFII are rubbed against each other. As a result, the ink layer on which the negative image is formed rubs against the ink layer, or the ink layer is fused, or the negative image is destroyed due to continuous shearing. Upper IDFII in guide plate 13
After friction with the lower IDFII, the turn roll 15
After turning, the second friction is performed again on the guide plate 13, so that the negative image is completely removed or deformed (the image is washed away). This process can be performed continuously at a high speed of about 1 m/sec.

As shown in FIG. 2, the height of the apparatus can be reduced by arranging the axis of the IDF roll 10 and the take-up reel 16 close to each other to the extent of the diameter of the IDF roll. Further, in the above embodiment, a single IDF was used, but the molten ink surfaces of two TDFs may be overlapped.

〔Effect of the invention〕

As explained above, according to the present invention, the negative image is destroyed by heating the used IDF and causing the heated ink surfaces to rub against each other, thereby preventing the deciphering of the content based on the negative image. It can be prevented.

[Brief explanation of drawings]

The first is a front view showing an embodiment of the present invention, and the second is an ID'
Front view showing another arrangement example of the F reel and the take-up reel, 3rd
The figure is a perspective view showing the basic structure of a thermal transfer color printer. Explanation of symbols 10--Used IDF roll, 1 t-----IDF, 12.14.
---Guide roll, 15---Turn roll,
16----- Winding reel, 17--------
Heater, 18-・-・-・-case. Patent applicant Fuji Xerox Co., Ltd. Agent Patent attorney Shin Matsubara 2 Seiji Muraki Tadao Hirata Jun Ueshima - Figure 1 Figure 3

Claims (1)

[Claims] An IDF characterized by having a means for heating the ink surface of a used ink donor film, and a means for pressing the two ink surfaces melted by the heating so as to face each other.
Negative image erasing device.