JPH0672001A - Stamping apparatus - Google Patents

Abstract

(57) [Summary] [Purpose] An object of the present invention is to provide a stamping device that replenishes the consumed ink amount even during continuous printing operation and does not deteriorate the printing quality. [Structure] A heater 12 for heating an ink impregnated body 116 of a stamp device is provided. When the user presses the grip 2, the ink impregnated body 116 is pressed, and the ink impregnated body 116 is pressed.
The ink impregnated in the permeation passes through the perforated image portion of the stencil sheet 119, the ink is transferred to the printing paper surface, and the printing is completed.
At this time, since the ink impregnated body 116 is heated by the heater 12, the ink viscosity is lowered and the fluidity is increased. When the ink impregnation body 116 reaches the printing surface side, the heating state becomes gentle and the ink viscosity increases, so that printing with good printing quality is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stamp device,
In particular, it relates to an improvement of a small and portable stamp device using a stencil sheet.

[0002]

2. Description of the Related Art Heretofore, as a small and portable stamp device of this type, there has been known a stamp device using a copy base paper in which characters, figures, etc. are drawn and punched with an iron brush or a ballpoint pen (Japanese Utility Model Publication No. 55-78456). Gazette).

The stamp device according to the above proposal will be described with reference to FIGS. 2 and 3. 2 is an exploded perspective view showing the stamp device 112 upside down, and FIG. 3 is a sectional view taken along the line AA in a state where the impregnated body mounting plate 117 of the stamp device is mounted on the stamp main body 114.

As shown in FIGS. 2 and 3, the stamp device 112 includes a stamp main body 1 having a grip 113 on the lower side.
14 and an ink impregnated body 116 located on the upper surface 115 of the stamp main body 114. The ink impregnation body 116 is provided with innumerable minute pores, and the pores are impregnated with ink.

The ink impregnation body 116 is an impregnation body mounting plate 117.
The impregnated body mounting plate 117 is fixed to the impregnated body mounting plate 117 by engaging the locking portions 117a formed at both ends of the impregnated body mounting plate 117 with the engaging portions 118 provided on the upper surface of the stamp main body 114. It is attached to the upper surface 115 of the stamp main body 114 and is removable. Further, a copy base paper 119 is closely attached to the surface of the ink impregnated body 116.

The impregnated body mounting plate 117 is the stamp main body 1.
The copy base paper 1 attached to the ink impregnation body 116 by the user holding the grip 113 in the state of being mounted on the paper 14.
When the stamp main body 114 is pressed against a printing paper (not shown) through the ink 19, the ink impregnated in the ink impregnation body 116 flows out from the perforated image perforated on the copy base paper 119, and the ink permeates the printing paper. Allows printing.

Further, the ink impregnated body 116 is crushed during printing, so that the ink impregnated in the ink impregnated body 116 flows out to the copy base paper 119, and the ink impregnated body 116 is
There is not enough ink on the print side of. In this case, the insufficient ink is replenished by the weight of the ink impregnated in the pores of the ink impregnation body 116, the capillary penetration force of the pores, and the like.

In order to obtain a proper print quality without bleeding, it is necessary that the "1 minute value" by the spread meter is 50 or less (25 ° C).

[0009]

However, the above-mentioned 1
Ink having a minute value has relatively high ink viscosity and poor fluidity, and when the printing operation is repeated in a short period, the ink on the ink impregnated body printing surface side is considerably insufficient due to ink consumption. In this state, ink replenishment is insufficient with the above-mentioned replenishing power alone. Therefore, there is a problem in that the print quality is deteriorated, for example, the printing is blurred.

Therefore, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a stamping device which replenishes the ink amount consumed during a continuous printing operation and does not deteriorate the printing quality. And

[0011]

To achieve this object, the present invention provides a stencil sheet on which a perforated image is formed, an ink-impregnated body impregnated with ink, and the ink-impregnated body via the stencil sheet. And a pressing device that presses the printing medium on the printing medium, and a stamping device that prints and forms an image corresponding to the punched image on the printing medium, including a heating device that heats the ink impregnated body.

The heating device is arranged on the non-printing surface side of the ink impregnated body.

[0013]

When the user presses the pressing device, the ink impregnated body is pressed, the ink impregnated in the ink impregnated body passes through the perforated image portion of the stencil sheet, and the ink is transferred to the printing paper surface.
Complete the print. At this time, since the ink impregnated body is heated by the heating device, the ink viscosity is lowered and the fluidity is increased. When the printing surface side of the ink impregnated body is sufficiently replenished with ink, and when the ink that has permeated the impregnated body reaches the printing surface side, the heating state becomes gentle and the ink viscosity increases, so that good printing quality is obtained. Printing is done.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In addition, the same reference numerals are given to the parts already described, and the duplicated description will be omitted.

FIG. 1 (A) shows a sectional view of the stamp device 1 at the time of non-printing. The stamp device 1 is composed of a grip 2 which is gripped and pushed at the time of printing, an ink impregnated body 116 impregnated with ink, a frame body 4 holding the ink impregnated body 116, a pedestal 5 and the like. On the printing surface side of the ink impregnation body 116,
A heat-sensitive stencil sheet (copy paper) 119 capable of punching by infrared irradiation or a thermal head is closely attached. As a typical example of the heat-sensitive stencil sheet 119, there is a sheet obtained by laminating a thermoplastic film and a porous thin paper with an adhesive.

The ink impregnation body 116 is formed of a porous body such as NBR (nitrile rubber) or urethane rubber having continuous pores, and the ink is impregnated in the continuous pores.

The frame body 4 has a cylindrical portion 4a for loading a dry battery on the upper side and a short cylindrical portion 4b for holding the ink impregnated body 116 on the lower side. A grip 2 having a recess is attached to the upper end side of the frame body 4, and a pedestal 5 is attached to the lower side of the frame body 4 so as to cover the short cylindrical portion 4b. A compressible first compression coil spring 7 is fitted on the outer circumference of the cylindrical portion 4a. Further, on the inner surface of the grip 2, a Pramai terminal spring 9 which also serves as an electrode of a dry battery, which will be described below, is disposed, and the spring 9 pushes the grip 2 upward.

The ink impregnation body 116 is inserted and fixed in the short cylindrical portion 4b of the frame body 4, and is pulled upward with respect to the base 5 by the first compression coil spring 7 via the grip 2.

Inside the cylindrical portion 4a of the frame body 4, two dry batteries 8 arranged in series are arranged, and the dry batteries 8 are connected to the heater 12 via a plus lead wire 10 and a minus lead wire 11. Has been done.

Next, the operation will be described. 1 (A), (B)
As shown in, the user of the stamp device 1 first attaches the heat-sensitive stencil sheet 119 on which the image is perforated by the thermal head or the like to the printing surface side of the ink impregnated body 116. Then, the printing surface is made to face the printing paper 13 and the grip 2 is pushed down, whereby the ink impregnated in the ink impregnated body 116 flows out through the heat-sensitive stencil sheet 119, and the ink penetrates into the printing paper 13.

When the grip 2 is pushed down, as shown in FIG.
As shown in, the Pramai terminal spring 9 is compressed and the voltage of the dry cell 8 is applied to the heater 12. As a result, the heater 12 is heated, the ink on the non-printing surface side of the ink impregnated body 116 is heated, the ink viscosity is reduced, the permeation rate of permeating the capillaries constituting the impregnated body is improved, and the fluidity is improved.

Here, the capillary penetration distance l is given by the following equation (1).

[0023]

[Equation 1]

However, r: capillary radius, γ: surface tension,
θ: contact angle, P: external force, t: time, η: ink viscosity. The ink viscosity η is 5 ° C; 42000
0 cps, 25 ° C; 46000 cps (“1 minute value” 4
3.5), 40 ° C .; temperature dependence is very large, such as 9500 cps. On the other hand, an appropriate ink viscosity for obtaining beautiful print quality without blurring is required to be 10,000 cps or more (“1 minute value” 50 or less). Therefore, when the ink impregnation body 116 is heated by the heater 12 as described above, the capillary permeation rate 1 is improved within a short time, and the ink is impregnated with the impregnation body 11.
6 permeates from the non-printing surface side to the printing surface side by a capillary phenomenon and migrates.

Further, when the grip 2 is pushed down, the first compression coil spring 7 is compressed, the ink impregnation body 116 is pressed against the printing paper 13 via the heat-sensitive stencil sheet 119, and the ink flows out.

As a result, ink is replenished from the non-printing surface side to the printing surface side of the ink impregnation body 116, and this ink replenishment is performed simultaneously with the outflow from the printing surface side to the printing paper 13 by printing. After the marking, when the user releases the grip 2, the elastic force of the first compression coil spring 7 and the Pramai terminal spring 9 tries to restore the state before the pressing (see FIG. 1A). With the restoration of the first compression coil spring 7 and the Pramai terminal spring 9, the connection between the dry battery 8 and the heater 12 is opened,
The heat generation of the heater 12 is stopped. Therefore, the fluidity of the ink increases only when the ink needs to be replenished (that is, at the time of printing).

Further, since the heater 12 is formed only on the non-printing surface side of the ink impregnation body 116, when the ink flows out and permeates into the printing paper 13, the ink viscosity is suitable for obtaining beautiful print quality without bleeding. "1 minute value", which is a normal viscosity
Has returned to 50 or less (25 ° C.), and since this is relatively hard ink, it has poor fluidity and is difficult to bleed.

As described above, since the heater 12 heats the non-printing surface side of the ink impregnated body 116 to reduce the ink viscosity and increase the fluidity only during printing, the ink impregnated body 116 is printed on the printing surface side. Ink replenishment is promoted, and blurring does not occur in printing even during continuous marking operations, and it is possible to prevent deterioration of print quality.

[0029]

As is apparent from the above description, according to the present invention, the ink impregnated body is heated by the heating device at the time of printing to reduce the viscosity of the ink and increase the fluidity, thereby making continuous printing. The ink can be quickly replenished on the printing surface side even during operation. As a result, it is possible to provide a stamp device with good print quality.

[Brief description of drawings]

1A and 1B are cross-sectional views of a stamp device according to an embodiment of the present invention, in which FIG. 1A is a non-imprinted state and FIG. 1B is a imprinted state.

FIG. 2 is an exploded perspective view of a conventional stamp device.

FIG. 3 is an enlarged cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Stamping device 2 ... Grip (pressing device) 4 ... Frame 5 ... Pedestal 7 ... First compression coil spring 8 ... Dry battery 9 ... Pramai terminal spring 10 ... Positive lead wire 11 ... Minus lead wire 12 ... Heater (heating device) 13 ... Printing paper 116 ... Ink impregnated body 119 ... Heat-sensitive stencil base paper (stencil base paper)

Claims (2)

[Claims] 1. A stencil sheet on which a perforated image is formed, an ink impregnated body impregnated with ink, and a pressing device for pressing the ink impregnated body to a printing medium via the stencil sheet, A stamp device for printing and forming an image corresponding to an image on a printing medium, comprising a heating device for heating the ink impregnated body. 2. The stamp device according to claim 1, wherein the heating device is arranged on a non-printing surface side of the ink impregnated body.