JPH07112738B2 - Image recording card erasing device that can print and erase by heating - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image erasing device for an image recording card which enables printing and erasing by heating.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 1, an image recording card A capable of printing and erasing by heating is known.

That is, a transparent polyester film a has a recording layer b on the upper surface thereof, and a protective layer c is formed on the upper surface thereof. Thermoreversible recording is possible, and when heated to room temperature, the turbid and transparent states can be maintained semipermanently and stably.
Since the turbidity temperature is 90 to 100 ° C, printing can be performed with a normal thermal head. Since the clearing temperature is 65 to 90 ° C, the printed portion can be erased.

Conventionally, a heat roll erasing device, a thermal head erasing device, and a sandwich heating erasing device using a single-sided heating element have been considered as the erasing device for the above image recording card. FIG. 9 shows a heat roll erasing device. Reference numeral 1 denotes a heat roll having a heater inside, which is pressed against a drive roll 2 so as to be vertically movable. The printed image recording card 3 is sandwiched between the heat roll 1 and the driving roll 2, and the driving roll 2 is rotated to move the image recording card 3 to bring the printing portion to a predetermined temperature. Heat and erase.

FIG. 10 shows a thermal head erasing device.
Numeral 4 is a well-known thermal head, which is pressed against a drive roll 5 so as to be vertically movable. The printed image recording card 3 is sandwiched between the thermal head 4 and the driving roll 5, the driving roll 5 is rotated to move the image recording card 3, and the printing portion is heated to a predetermined temperature. Heat and erase.

FIG. 11 shows a sandwich heating and erasing device using a single-sided heating element. A single-sided heating element 7 having a flat lower surface is arranged above the fixing member 6 having a flat upper surface so as to be vertically movable, and the single-sided heating element 7 is displaced upward to fix the image recording card 3 to the fixing member 6. Then, the single-sided heating element 7 is pressure-bonded onto the image recording card 3 and is heated to a predetermined temperature in a stationary state to erase the character.

[0007]

DISCLOSURE OF THE INVENTION In the above prior art,
The heat roll erasing device erases characters while the image recording card rubs against the heat roll, so the surface of the image recording card is easily scratched, and the image recording card and the heat roll are Since the lines are in line contact, the erasure time is long and the image recording
Since the temperature peculiar to the card is required, uneven erasure occurs due to uneven heating during line contact with the heat roll, and the moving speed of the image recording card during erasure is restricted. There is a problem that the structure of the device is complicated and repair and inspection are not easy.

In the thermal head eraser, the image recording card rubs the thermal head so that the surface of the image recording card is easily scratched, and dust is likely to accumulate on the thermal head. There is a problem that the life is shortened and the erasing time becomes long due to the point and line contact between the thermal head and the image recording card.

Since the single-sided heating device using a single-sided heating element heats only one side of the image recording card, heat is absorbed by the fixing member, and it takes time for the image recording card to reach the erased temperature without the heat being accumulated. There was a problem that

[0010]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and a pair of heating members for sandwiching a printing portion of an image recording card capable of printing and erasing by heating from both sides. And means for heating the recording card from both sides for a predetermined time,
It is characterized in that it has means for separating the pair of heating bodies and means for transferring the image recording body after the erasure.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described in detail with reference to FIGS. Reference numerals 10 and 11 denote both side walls of the housing, which are integrally connected by an upper fitting 12 and a lower fitting 13. A solenoid 14 is fixed to the upper fitting 12. Reference numeral 15 is a movable shaft of the solenoid 14. 16 is both side walls 16a, 16
b and the bottom plate 16c are movable members, and both side walls 16a, 1
Four guide rods 17 are fixed to the front and rear and up and down on 6b, and the projecting end portions are vertically movably fitted in vertically elongated grooves 10a and 11a of both side walls 10 and 11, respectively. Reference numeral 18 is a pin fixed to both side walls 10 and 11 and vertically elongated grooves 10a and 11a. A spring 19 is stretched between the upper guide rod 17 and the movable member 16 and
Is always urged upward. Bottom plate 16c of movable member 16
A member 20 having a convex portion 20a that fits under the central hole 14a of the solenoid 14 is fixed to the upper surface, a fixture 22 is fixed to the lower surface, and a heating element 23 and an upper heat medium 21 having a flat lower surface are fixed. . A lower fixture 25 is fixed on the lower metal fitting 13, and a heating element 26 and a lower heating medium 24 having a flat upper surface are fixed.

Next, the operation will be described. Solenoid 1
4 is not energized, the guide rod 17 is pulled upward by the pin 18 and locked to the upper ends of the longitudinal grooves 10a and 11a, and the upper heat medium 21 integrated with the movable member 16 is fixed to the lower heat medium 24 as shown in FIG. The distance is far. In this state, as shown in FIG. 6, the printed image recording card 3 is inserted between the upper heat medium 21 and the lower heat medium 24. Then, the solenoid 14
When current is applied to the movable shaft 15, the movable shaft 15 descends and presses the convex portion 20a downward, so that the movable member 16 descends against the elasticity of the spring 19 and the upper heat medium 21 keeps the image recording card 3 constant as shown in FIG. The pressure is applied to the lower heat medium 24. The upper heat medium 21 and the lower heat medium 24 are set to a heating state at a predetermined erasing temperature, and the printing portion of the image recording card 3 is erased in a short time.

When the solenoid 14 is de-energized after the characters are erased, the elastic force of the spring 19 causes the movable member 16 and the upper heat medium 21 to return to their original positions as shown in FIG. Then, the erased image recording card 3 is taken out.

FIG. 8 shows a second embodiment of the present invention. Buffer materials 27 and 28 having excellent thermal conductivity are fixed to the surfaces of the upper heat medium 21 and the lower heat medium 24 of the first embodiment. Other structures and actions are similar to those of the first embodiment.

[0015]

According to the present invention, a pair of heating members for sandwiching the printing portion of the image recording card capable of printing and erasing by heating from both sides, and heating the recording card from both sides for a predetermined time. The following effects can be obtained by the means for separating, the means for separating the pair of heating bodies, and the means for transferring the image recording body after the erasure. a. Since the image recording card printing section is heated from both sides by the facing heating elements placed in the pre-erased temperature state, the characters are erased in a short time. b. At the time of erasing characters, the image recording card is in a stationary state, so that scratches such as scratches are less likely to occur. c. At the time of erasing, the image recording card is uniformly pressed from both sides by the heating body, so that the dents and scratches that are likely to occur at the time of erasing are less likely to occur. d. Since the image recording card and the heating member are in surface contact with each other, the entire surface of the printing portion can be heated uniformly, unevenness in erasure can be eliminated, and reliable erasure can be achieved. e. Since the known structure is simple, the entire device can be downsized.

In the case of the second embodiment, the plane accuracy of the upper heat medium and the lower heat medium is not required, which leads to cost reduction.

[Brief description of drawings]

FIG. 1 is an enlarged partial view of a front section of an image recording card used in the present invention.

FIG. 2 is a front view of the first embodiment of the present invention.

FIG. 3 is a right side view of FIG.

FIG. 4 is an exploded perspective view of FIG.

FIG. 5 is an exploded perspective view of the heating unit of FIG.

FIG. 6 is an operation explanatory view before the upper and lower heat mediums are attached.

FIG. 7 is an operation explanatory diagram when the upper and lower heat mediums of FIG. 5 are attached.

FIG. 8 is a front view of a second embodiment of the present invention.

FIG. 9 is a front view of a conventional first comparative example.

FIG. 10 is a front view of a second conventional comparative example.

FIG. 11 is a front view of a conventional third comparative example.

[Explanation of symbols]

 A Recording / erasable image recording card 14 Solenoid 16 Movable member 21 Upper heat medium 22 Mounting tool 23 Heating element 24 Lower heating medium 25 Lower mounting tool 26 Heating element

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location B41M 5/36 9121-2H B41M 5/26 M 9121-2H 102

Claims (2)

[Claims] 1. A pair of heating members for sandwiching a printing portion of an image recording card capable of printing and erasing by heating from both sides, and a means for heating the recording card from both sides for a predetermined time. An erasing device for an image recording card capable of printing and erasing by heating, having means for separating a pair of heating bodies and means for transferring an image recording body after erasing. 2. An erasing device for an image recording card capable of printing and erasing by heating according to claim 1, wherein a cushioning material having excellent thermal conductivity is fixed on the surface of the pair of heating bodies.