JPH0439018Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to an improvement of a printer that cools paper to prevent ink from smearing after ink transfer.

[Conventional technology]

So-called inkjet printers, which print by jetting ink onto paper, require a delicate balance in terms of ink viscosity, etc. In other words, if you adjust the ink to the extent that it does not smudge when sprayed onto paper, the adhesion to the paper after printing will be weakened.
If the clay has sufficient adhesion, the ink will bleed.

Therefore, by cooling the paper more than before,
Techniques have been proposed to prevent ink smearing and to obtain prints with sufficient adhesion to paper.

FIG. 3 shows such a conventional technique, and is a cross-sectional view of a main part of a printer having a paper cooling mechanism.

In the figure, reference numeral 1 denotes a printer head having a substantially truncated conical shape, with one end being cylindrical and the other end being conical, and a printing portion is formed on the outer peripheral surface of the cylindrical portion.

2 is a sheet of paper facing the printer head 1;
is a duct for guiding air to cool the back surface of the paper 2, that is, the surface opposite to the printed surface.

Further, 4 is an exhaust fan motor provided at the outlet of the duct.

Cooling air A is supplied from an air supply fan motor (not shown) provided at the air supply port of the duct 3, moves in the direction of the arrow along the outer circumferential surface of the paper 2, and cools it while passing through the exhaust fan. It stays in the motor 4 and is discharged to the outside.

[Problem that the invention attempts to solve]

However, the conventional technology having the above configuration and operation has the following problems.

(b) It is not possible to respond appropriately to changes in paper thickness. In other words, in the conventional technology, since air is circulated along the back side of the paper to cool it, in the case of thick paper, the desired cooling effect cannot be obtained on the front side, that is, the print side, and printing may occur due to ink smearing. A defect occurs.

(b) As the cooling air circulates around the back side of the paper and reaches the outlet, the paper is pushed toward the printer head, so the proper distance between the paper and the printer head (usually 1.5 mm clearance is strictly required). (required) cannot be maintained, resulting in uneven printing.

[Means for solving problems]

This invention attempts to solve the above-mentioned conventional problems by providing a blower mechanism at a position facing the printer head to supply cooling air between the paper and the printer head.

[Effect]

In this design, the cooling air directly hits the front side of the paper, that is, the printing surface, so the desired cooling effect can be obtained without being affected by the thickness of the paper, and the distance between the paper and the printer head can also be adjusted. It can be held properly.

〔Example〕

An embodiment of this invention will be described based on the drawings. The same parts as in the conventional example are denoted by the same reference numerals, and redundant explanation will be omitted. FIG. 1 and FIG. 2 are diagrams showing an embodiment of this invention. FIG. 1 is a perspective view of the main parts of the printer, and FIG. 2 is a cross-sectional view of the main parts.

In the figure, 3 is a duct, 4a is an intake fan motor provided at the intake port of the duct 3, 5 is an exhaust fan motor provided at the exhaust port of the duct 3, and the duct 3, the intake fan motor 4a, The exhaust fan motor 5 constitutes a ventilation mechanism.

The air supply fan motor 4a serving as the air source in this air blowing mechanism is connected to the printer head 1.
It is provided below the printer head 1 and at a position opposite to the opening formed by both ends of the paper 2 set around the printer head 1.

6 is a pick-up roller, 7 is a pressure roller, 8, 8 and 9, 9 are drive pulleys, 10
1 is a paper cassette, and 11 and 12 are synchronized belts placed between drive pulleys 8 and 8 and between drive pulleys 9 and 9, respectively.

[Operation]

The operation of this embodiment will be explained based on the above configuration.

The paper 2 in the paper cassette 10 is
When pushed by a pressing mechanism (not shown) inside, the paper 2 is pushed against the pick-up roller 6 and pulled out. This pulled out piece of paper 2 is
The outer shell 13 and the inner shell 1 are sent between an insert roller and a pressure roller 7 (not shown), and further pass through an inlet rail (not shown).
4, and the leading edge of the paper 2 is sent to an end rail (not shown).

Next, the paper 2 is lifted up by tabs (not shown) at the lower ends of the endless synchro belts 11 and 12, and set at a printing position around the printer head 1.

Then, the supply of cooling air is started from the air supply fan motor 4a, and then the printing operation starts.

The cooling air sent below the printer head 1 and to the opening of the paper 2 circulates between the printer head 1 and the front side of the paper 2 (in the direction of the arrow in FIG. 2) and cools the paper 2. It moves upward in the duct 3 and is discharged to the outside by the exhaust fan motor 5.

In this embodiment, an exhaust fan motor is used to discharge the cooling air, but this is not always necessary, and a sufficient cooling effect can be obtained using only the air supply fan motor.

[Effect of idea]

This invention has the above-mentioned configuration and operation, so the paper is properly cooled without being affected by the thickness of the paper, eliminating ink smearing, and the paper and printer head are spaced at a predetermined distance. Because it can be retained, it has the effect of always producing beautiful prints with character.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the main parts of the printer according to this invention, Fig. 2 is a cross-sectional view of the main parts, and Fig. 3 is a
FIG. 2 is a cross-sectional view of a main part of a conventional example. 1...Printer head, 2...Paper, {3...
...Duct, 4a...Air supply fan motor, 5...
Exhaust fan motor}Blower mechanism.

Claims (1)

[Scope of utility model registration request] The paper is sent from the paper cassette between the presser roller and the insert roller using the pick-up roller, and then the paper is further sent from the entrance rail to the space between the outer shell and the inner shell using both rollers, and then the paper is moved to a position facing the printer head. In a printer that prints by raising the printer head, an air blowing mechanism is provided so that the air source faces an opening in the paper surrounding the printer head, and paper cooling air is supplied between the paper and the printer head. A printer characterized by: