JPH065963U - Image forming device - Google Patents

Abstract

(57) [Summary] [Purpose] The image information remaining on the ink film after transfer cannot be visually recognized, and there is no fear that the image information will be known to others. [Structure] An ink film 29 formed by applying a heat-meltable ink on a base film 30 is provided. Supply roll 3
The ink film 29 unwound from the No. 2 is wound between the thermal head 28 and the platen roller 27 and the take-up roll 3
Let it roll up to 3. The thermal head 28 melts the ink on the ink film 29 in a dot matrix manner and transfers it onto the recording paper P. The adhesive sheet 36 having the adhesive portions 36a and 36b on both sides is wound and supported by the supply roll 37, and one end thereof is connected to the winding roll 33. When the transferred ink film 29 is taken up by the take-up roll 33, the adhesive sheet 36 is also taken up at the same time. Then, the ink films 29 that are wound up and adjacent to each other are attached by the attaching portions 36 a and 36 b of the attaching sheet 36.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a thermal transfer type image forming apparatus in which ink on an ink sheet is melted by a thermal head and is transferred onto a sheet.

[0002]

[Prior art]

 In this type of image forming apparatus, the thermal head is arranged to face the platen roller. Then, the ink film as an ink sheet unwound from the supply roll is taken up by the take-up roll via between the thermal head and the platen roller. This ink film is formed by applying a heat-meltable ink on a thin film.

Then, the paper fed between the platen roller and the ink film is fed by the rotation of the platen roller and is supported on the platen roller. In this state, the thermal head melts the ink on the ink film like a dot matrix, and the melted ink is transferred onto the paper.

When all of the ink film is unwound from the supply roll and taken up by the take-up roll, the ink film taken up by the take-up roll is used and discarded together with the supply roll and the take-up roll. It was like this.

[0005]

[Problems to be solved by the device]

 However, the ink on the ink film is peeled off from the ink film only at the portion which is melted by the thermal head and transferred onto the paper. Therefore, ink remains on the ink film wound on the take-up roll, except for the part that was transferred and peeled off on the paper, and images such as characters transferred on the paper are printed on the film. The information is left in a white state.

Therefore, when the discarded ink film is unwound from the take-up roll, the image information similar to the image information transferred on the paper can be easily visually recognized. Therefore, if the ink film is discarded unintentionally, there is a problem that the image information can be easily known to others.

The present invention has been made to solve the above problems, and its purpose is to make it impossible to visually recognize the image information remaining on the ink film after transfer, and An object of the present invention is to provide an image forming apparatus that can eliminate the possibility of being known by a person.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention has an ink sheet formed by applying a heat-meltable ink onto a sheet material, and the ink on the ink sheet is melted by a thermal head to transfer the ink onto the paper. Then, in the image forming apparatus that winds the transferred ink sheet on the take-up roll, provide a sticking tape having sticking parts on both sides, and wind the sticking tape together with the ink sheet on the take-up roll. It is configured as follows.

[0009]

[Action]

 Therefore, according to the present invention, the transferred ink film is taken up by the take-up roll. At this time, the ink film is wound up together with an adhesive tape having adhesive parts on both sides. Then, the ink films that are wound up and adjacent to each other are attached by the adhesive tape. Therefore, the ink film once wound on the winding roll cannot be unwound from the winding roll, and the image information remaining on the ink film becomes invisible.

[0010]

【Example】

 An embodiment in which the image forming apparatus of the present invention is embodied as a facsimile apparatus will be described in detail below with reference to FIGS. 1 and 2.

As shown in FIG. 1, inside the apparatus case 1, a reading unit 2 for reading an image on a document G, and a recording sheet P as a sheet based on the received image data and the like. A recording unit 3 for printing is arranged. Further, two paper feed cassettes 4 and 5 for accommodating the recording paper P are vertically and detachably mounted in the lower part of the apparatus case 1.

Explaining the reading section 2, the document G is supported on the document supply tray 6 in a stacked state, and the document G is fed by the rotation of the feed assist roller 7 and fed. By the cooperation of the roller 8 and the separation pad 9, the sheets are separated one by one and sent between the pair of paper guides 10 in the device case 1. Then, through the reading window 11 formed in a part of the paper guide 10, light is emitted from the light source 12 to the original G transported between the paper guides 10, and the reflected light is reflected by the plurality of mirrors 13 and lenses 14. The image on the original G is read by being guided to the image sensor 15 via. The document G after the image reading is discharged onto the document discharge tray 17 by the rotation of the plurality of guide rollers 16.

Next, the recording unit 3 and the sheet feeding cassettes 4 and 5 will be described. Inside the respective sheet feeding cassettes 4 and 5, a large number of recording sheets P are accommodated in a stacked state. The half-moon-shaped paper feed roller 18 is rotatably disposed above the paper feed cassettes 4 and 5, and the rotation of the paper feed rollers 18 causes the recording paper P to be moved from the paper feed cassettes 4 and 5 to 1 It is sent out one by one. Then, the recording paper P sent out from the upper paper feed cassette 4 is sent to the space 23 between the pair of paper guides via the paper guides 19 and 20 and the pair of feed rollers 21 and 22. Further, the recording paper P sent out from the lower paper feed cassette 5 is sent between the paper guides 23 via the paper guides 24, 25, 19, 20 and the pair of feed rollers 26, 21, 22.

The platen roller 27 is arranged on the downstream side of the paper guide 23 so as to be positively rotatable, and a thermal head 28 is arranged so as to face the platen roller 27. As shown in FIG. 2, the ink film 29 as an ink sheet is formed by applying a heat-meltable ink on a thin base film 30 as a sheet material to form an ink layer 31. The supply roll 32 and the take-up roll 33 of the ink film 29 are arranged in the apparatus case 1 so as to be positively rotatable, and the ink film 29 unwound from the supply roll 32 is placed between the platen roller 27 and the thermal head 28. It is adapted to be taken up by the take-up roll 33 via.

The recording paper P that has passed between the paper guides 23 is fed between the platen roller 27 and the ink film 29, and is fed by the rotation of the platen roller 27. Supported above. In this state, the ink on the ink film 29 is melted like a dot matrix by the thermal head 28 based on the received image data and the like, and the melted ink is peeled off from the base film 30 and the recording paper P is printed. Transcribed on. The recording paper P after transfer is discharged onto the recording paper discharge tray 35 via the pair of guide rollers 34. The feeding speed of the ink film 29 by the rotation of the supply roll 32 and the winding roll 33 is almost the same as the feeding speed of the recording paper P by the rotation of the platen roller 27.

As shown in FIGS. 1 and 2, the supply roll 37 of the adhesive sheet 36 is rotatably arranged on the outer peripheral side of the winding roll 33 so as to extend along the axial direction thereof, The dressing sheet 36 is wound and supported. The adhesive sheet 36 as an adhesive tape has a plurality of strip-shaped adhesive portions 36a and 36b formed on both surfaces thereof. Further, the front surface side sticking portion 36a and the rear surface side sticking portion 36b are arranged so as not to overlap with each other. Therefore, in the wound state of the adhesive sheet 36, the adhesive portion 36a on the front surface side and the adhesive portion 36b on the back surface side are not adhered to each other. Therefore, the adhesive sheet 36 can be unwound from the supply roll 37 with a small force, and the unwinding operation can be performed smoothly. The total length of the adhesive sheet 36 is substantially the same as the total length of the ink film 29.

One end of the adhesive sheet 36 is connected to a winding roll 33 that winds the ink film 29. Therefore, when the take-up roll 33 is rotated, the adhesive sheet 36 is unwound from the supply roll 37 and taken up by the take-up roll 33 together with the ink film 29.

Next, the operation of the facsimile apparatus configured as described above will be described. Now, when the image data is transmitted from the transmission side device, the recording unit 3 is activated, and the recording paper P is sent out from either one of the paper feed cassettes 4 and 5 by the rotation of the paper supply roller 18. , And is fed between the platen roller 27 and the ink film 29. The recording paper P is fed by the rotation of the platen roller 27 and is supported on the platen roller 27. Then, in this state, the ink on the ink film 29 is melted in a dot matrix manner by the thermal head 28 based on the received image data, and the melted ink is peeled off from the base film 30 and recorded on the recording paper P. Is transcribed to.

At this time, by the rotation of the supply roll 32 and the take-up roll 33, the ink film 29 before transfer is unwound from the supply roll 32, and the ink film 29 after transfer is taken up by the take-up roll 33. When the ink film 29 is wound up, the sticking sheet 36 is also wound up around the winding roll 33 at the same time. Then, the ink films 29 that are wound up and adjacent to each other are stuck by the sticking portions 36a and 36b provided on both surfaces of the sticking sheet 36.

When the ink film 29 on the supply roll 32 side is completely unwound and wound on the take-up roll 33 side, the ink film 29 is considered to be used and is supplied from the apparatus together with the supply roll 32 and the take-up roll 33. It is removed, discarded, and replaced with a new one. At this time, the adhesive sheet 36 having a total length substantially the same as the total length of the ink film 29 is also unwound from the supply roll 37 side and wound up to the take-up roll 33 side. It is removed from the equipment, discarded, and replaced with a new one.

When the discarded ink film 29 is to be unwound from the take-up roll 33, the ink films 29 that have been wound up and are adjacent to each other are stuck via the sticking sheet 36. The ink film 29 once wound on the winding roll 33 cannot be unwound from the winding roll 33. Therefore, even if the user tries to know the image information remaining on the ink film 29 after the transfer, it becomes impossible to visually recognize the image information. Further, if the ink film 29 is forcibly unwound from the take-up roll 33, the ink film 29 will be torn, and in this case also, it becomes impossible to visually recognize the image information remaining on the ink film 29.

Therefore, even if the used ink film 29 is carelessly discarded, there is no fear that the image information remaining on the ink film 29 will be known to others. The present invention is not limited to the above-mentioned embodiment, and can be embodied in the following manners, for example. (1) As shown in FIG. 3, the take-up roll 33 of the ink film 29 and the supply roll 37 of the adhesive sheet 36 are rotatably supported in a box-shaped cartridge 38, and the cartridge 38 is attached to the apparatus case 1 Attach it detachably inside. (2) Adhesive portions 36a and 36b are provided on the entire front surface and back surface of the adhesive sheet 36, and an easily peelable sheet such as a paraffin sheet so as not to be adhered to each other when wound around the supply roll 37. Co-roll. Then, only the sticking sheet 36 is wound around the winding roll 33 together with the transferred ink film 29, and the easily peelable sheet is wound around another winding roll. (3) Appropriately changing the arrangement configuration of the adhesive parts 36a and 36b on the adhesive sheet 36.

[0023]

[Effect of device]

 As described in detail above, according to the present invention, it is possible to eliminate the possibility that the image information remaining on the ink film after transfer cannot be visually recognized, and the image information can be prevented from being known to others. Demonstrate.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment in which an image forming apparatus of the present invention is embodied as a facsimile machine.

FIG. 2 is a partially enlarged perspective view showing an ink film and an adhesive sheet wound on a winding roll.

FIG. 3 is a partial cross-sectional view showing another example of the present invention.

[Explanation of symbols]

28 ... Thermal head, 29 ... Ink film as ink sheet, 30 ... Base film as sheet material, 3
1 ... Ink layer, 33 ... Winding roll, 36 ... Adhesive sheet as adhesive tape, 36a, 36b ... Adhesive part.

Claims (1)

[Scope of utility model registration request] 1. A sheet material having an ink sheet formed by applying a heat-meltable ink, the ink on the ink sheet is melted by a thermal head and transferred onto a sheet, and the transferred ink sheet is wound. An image forming apparatus configured to be wound on a take-up roll, in which an adhesive tape having adhesive parts on both sides is provided, and the adhesive tape is wound on a take-up roll together with an ink sheet.