JP2005178274A - Form paper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make it possible to prevent a double-feeding or mis-feeding from developing in a form sheet with highly smooth printing surface having low static frictional coefficient fed to a paper feeding device with a feed roller. <P>SOLUTION: At least one side edge of a printing surface 2 coming into contact with the feed roller 9 is employed as a non-printing region 6 and, in addition, a low slipperily worked surface 7, which lowers smoothness and increases the static frictional coefficient, is formed in the non-printing region 6. As a result, at the feeding of the sheet, the double-feeding developing from the mutual close contact between the form sheets 1 and 1 due to their high smoothness and the mis-feeding developing from the slippage between the feed roller 9 and the form sheet due to its low static frictional coefficient can be prevented from developing. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a form paper fed by a paper feeding device having a feed roller.

  In general, in a paper feeder provided with a feed roller provided in an optical reader (OCR) or a printer, a plurality of form sheets are placed on a hopper b constituting the paper feeder a as shown in FIG. c is stacked, and the sheet roller c positioned at the uppermost part is sequentially pulled out by the rotation of the feed roller d pressed from above, and is supplied to the reading unit of the optical reading device and the printing unit of the printing device ( For example, see Patent Document 1).

For the form paper c fed by such a paper feeding device a, double feed (double feeding) caused by close contact due to the high smoothness between the form papers c at the time of paper feeding, or low with respect to the feed roller d. In order to prevent misfeed (loss of feed) due to frictional force, high-quality paper and OCR paper having a predetermined smoothness (about 100 to 200 seconds) and a static friction coefficient (about 0.45) are used.
JP-A-9-267553 (FIG. 4)

  By the way, in recent years, thermal paper has begun to be used for form paper such as postal transfer paper that is machine-processed by reading required information by an optical reader. As is well known, such a thermal paper has a printing surface made of a thermosensitive coloring layer on the surface of a paper substrate, and printing on the thermal paper is performed by a thermal head that slides on the printing surface. The thermal paper print surface has a high smoothness of 250 seconds or more and a low static friction coefficient of 0.3 or less to eliminate thermal printing unevenness due to the thermal head during printing and to prevent premature wear of the thermal head. It has become.

  Therefore, as compared with high-quality paper and OCR paper, form paper made of thermal paper having a high printing surface smoothness and a low static friction coefficient as described above is fed to a paper feeding device equipped with a feed roller of an optical reading device. When a plurality of sheets are set and fed, the form sheets are in close contact with each other due to high smoothness, and double feed is likely to occur. Also, because the static friction coefficient is small, the feed roller is prone to slip misfeed. There was a problem.

  Also, not only thermal paper but also art paper or coated paper with a coating layer on the printing surface, or form paper made of a synthetic resin film, the smoothness and static friction coefficient are substantially the same as thermal paper. For this reason, when a plurality of sheets are set in a paper feeding device having a feed roller provided in an optical reading device or a printing device to feed paper, double feed or misfeeding is likely to occur like thermal paper. there were.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a form paper having a printing surface with a high smoothness and a low static friction coefficient and capable of preventing double feed and misfeed at the time of paper supply. Is.

  According to the present invention, at least one edge of the printing surface that contacts the feed roller is not formed on a form paper having a printing surface with high smoothness and a low static friction coefficient that is fed by a paper feeding device having a feed roller. A form paper which is a printing area and has a non-printing area formed with a low slip processing surface which reduces smoothness and increases a coefficient of static friction.

  Here, the non-printing area where the low slip surface is formed can be only one edge of the printing surface, or at least two opposite edges of the printing surface, and the non-printing area can be one side of the printing surface. When only the edge is used, the edge is set so that the one edge is positioned on the front side in the paper feeding direction when the paper is fed by the paper feeding device. Further, high smoothness means that the smoothness is 250 seconds or more as measured by JIS P8119, and low static friction coefficient means that the static friction coefficient is 0.3 or less as measured by JIS P8147. . Examples of the form paper having a printing surface having a high smoothness and a small static friction coefficient include thermal paper, art paper, coated paper, and synthetic resin film. The smoothness of the non-printing area formed in the non-printing area of these form papers reduces the smoothness of the non-printing area to about 100 to 200 seconds, which is substantially the same as that of high-quality paper and OCR paper, and the non-printing area. The static friction coefficient of the region is increased to about 0.45, which is substantially equivalent to that of high-quality paper or OCR paper.

  For the low slip surface, one with a printed layer consisting of 20 to 70% halftone dot printing, one with embossing, or one with a plurality of through holes is proposed. The

  Further, as a form paper to which the present invention is applied, a sheet having a thermal coloring layer on the printing surface is proposed. Here, the printing surface may be only the thermosensitive coloring layer, or may be one in which an overcoat layer is provided on the thermosensitive coloring layer. An example of such form paper is thermal paper.

  As described above, the present invention provides a printing paper that is fed by a paper feeder provided with a feed roller and has a printing surface with high smoothness and low static friction coefficient. Since the non-printing area has at least one edge, and the non-printing area is formed with a low slippery surface that reduces the smoothness and increases the coefficient of static friction, the slipperiness is low. Depending on the processed surface, the smoothness and static friction coefficient of the non-printing area can be made substantially equal to those of high-quality paper or OCR paper. Accordingly, it is possible to prevent double feed caused by close contact between the form sheets due to high smoothness and misfeed caused by slipping of the feed roller due to a small coefficient of static friction. In addition, since the low slip surface is formed in the non-printing area of the printing surface, there is no problem in printing on the printing surface.

  And the low slip processing surface is formed by forming a printing layer composed of 20-70% halftone dot printing, embossed, or formed by a plurality of through holes. By doing so, it is possible to easily perform low slip processing that reduces the smoothness and increases the coefficient of static friction for the non-printing area of the printing surface.

  Further, the form paper to which the present invention is applied is provided with a heat-sensitive color developing layer on the printing surface, so that the form paper such as postal transfer paper made of thermal paper, which has recently been used, is fed into the optical reader. Paper feeding by the apparatus can be performed satisfactorily.

Below, the 1st Example of this invention is described based on FIGS.
FIG. 1 shows a form sheet 1 according to the present invention, and a printing surface 2 is formed on the entire form sheet 1. Here, when the form paper 1 is a thermal paper, the printing surface 2 includes a thermal coloring layer 4 and an overcoat layer 5 sequentially laminated on the surface of the paper base 3 as shown in FIG. In addition, when the form paper 1 is art paper or coated paper, a coating agent layer 4 ′ mainly composed of white clay is provided in place of the heat-sensitive coloring layer 4. The heat-sensitive color developing layer 4 or the coating agent layer 4 ′ is coated with a blade coater or calendered after being coated with a roll coater or an air knife coater. Thereby, the printing surface 2 of thermal paper, art paper or coated paper has a smoothness as high as 250 seconds or more and a static friction coefficient as small as 0.3 or less. Further, when the form paper 1 is a synthetic resin film having the printing surface 2 on the surface, the smoothness of the printing surface 2 is 250 seconds or more and the static friction coefficient is 0.3 or less due to the characteristics of the material. Yes.

  As shown in FIG. 1, the printing surface 2 of the form 1 has at least two opposing edges as non-printing areas 6 and 6. The non-printing areas 6 and 6 are set in the margins of the paper that is not printed by the printing apparatus, and low slip surfaces 7 and 7 are formed in the non-printing areas 6 and 6. In this first embodiment, the low-slip processed surfaces 7 and 7 are composed of printing layers 8 and 8 formed by performing dot printing of 20 to 70% as shown in FIG. For the halftone dot printing, a normal printing ink such as an oxidation polymerization ink or a UV curable ink can be used. Then, the smoothness of the non-printing areas 6 and 6 is reduced to about 100 to 200 seconds by the low slip processing surfaces 7 and 7, and the static friction coefficient is increased to about 0.45. As a result, the smoothness and the static friction coefficient of the non-printing areas 6 and 6 are substantially the same as those of high-quality paper and OCR paper. Further, as described above, the printing layers 8 and 8 constituting the low slip processing surfaces 7 and 7 are easily formed by applying 20 to 70% halftone dot printing. I am trying to get it.

  In such a configuration, the printing surface 2 of the form 1 is printed by a printing device corresponding to the paper type. That is, when the form paper 1 is a thermal paper, a thermal printing device having a thermal head is used. When the form paper 1 is an art paper, a coated paper, or a synthetic resin film, a laser printer, an ink jet printer, or the like is used. A printing device is used. At the time of printing on the printing surface 2 by such a printing device or at the time of reading by the optical reading device of required information printed on the printing surface 2, as shown in FIG. When a plurality of sheets are set on a hopper 11 of a paper feeding device 10 having a feed roller 9 provided in the printing device to feed paper, the low slip processing surfaces 7 and 7 formed in the non-printing areas 6 and 6 are provided. As a result, the smoothness and static friction coefficient of the non-printing areas 6 and 6 are substantially the same as those of high-quality paper and OCR paper. In addition, since the static friction coefficient is small, misfeed caused by sliding of the feed roller 9 can be prevented, and the form paper 1 located at the top can be pulled out one by one in order.

  At this time, since the low slip processing surfaces 7 and 7 are formed in the non-printing areas 6 and 6 on at least two opposing edges of the printing surface 2, as shown in FIG. If the slip sheet 1 is set so that the low slip processing surfaces 7 and 7 are positioned on both the left and right sides of F, the low slip processing surfaces 7 and 7 are connected to the feed roller 9 at two positions on the left and right sides of the slip sheet 1. It will come into contact evenly. Further, as shown in FIG. 5B, if the form paper 1 is set so that the low slip processing surfaces 7 and 7 are positioned before and after the paper feed direction F, the front side of the form paper 1 is reduced. The entire lubricated surface 7 comes into contact with the feed roller 9 evenly. Thereby, the form paper 1 can be set in the paper feeding device 10 in any of the front, rear, left and right directions. Further, at least two opposite edges of the printing surface 2 are defined as non-printing areas 6 and 6, and the non-printing areas 6 and 6 are formed with low-slip processed surfaces 7 and 7 so that printing on the printing surface 2 can be performed. Can be performed without hindrance.

  FIGS. 6 and 7 show a second embodiment of the present invention, which is a low slip surface 7 formed on the non-printing areas 6 and 6 on at least two opposite edges of the printing surface 2. 7 are formed by embossing. Here, the embossing can be easily formed by passing the form sheet 1 between a pair of upper and lower rollers provided with a recess on the peripheral surface of the upper roller and a protrusion on the peripheral surface of the lower roller. As shown in FIG. 7, the embossing is formed so as to have a large number of protrusions 12 protruding at least on the upper surface side of the non-printing areas 6, 6. 6 may be provided with a large number of recesses (not shown) protruding on the lower surface side. Moreover, the shape of the protrusion 12 can be any shape other than an oval as shown in the figure, such as a circle, a rectangle, a satin pattern, etc., and its size and arrangement are also arbitrarily set. The smoothness of the non-printing areas 6 and 6 is reduced to about 100 to 200 seconds and the static friction coefficient is increased to about 0.45 by the low slip processing surfaces 7 and 7 made of such embossing. Yes.

  FIGS. 8 and 9 show a third embodiment of the present invention, which is a low slip surface 7 formed on the non-printing areas 6 and 6 on at least two opposite edges of the printing surface 2. , 7 are constituted by a plurality of through holes 13. The through-hole 13 can be easily formed by passing the form sheet 1 between a pair of upper and lower rollers provided with a punch on the peripheral surface of one roller and a punch insertion hole on the peripheral surface of the other roller. Moreover, the shape of the through-hole 13 can be made into an oval, a rectangle, and other arbitrary shapes other than the circular shape shown in figure, The magnitude | size and arrangement | positioning aspect are also set arbitrarily. Then, the smoothness of the non-printing areas 6 and 6 is reduced to about 100 to 200 seconds and the coefficient of static friction is increased to about 0.45 by the low slip processing surfaces 7 and 7 formed of the plurality of through holes 13. I am doing so.

  Even in the second embodiment and the third embodiment, the same effects as the first embodiment described above can be obtained. In other words, the smoothness and static friction coefficient of the non-printing areas 6 and 6 can be made substantially equal to those of high-quality paper and OCR paper by the low-slip processed surfaces 7 and 7. Therefore, it is possible to prevent double feed that occurs when the form sheets 1 and 1 are in close contact with each other and misfeed that occurs when the feed roller 9 slips because the coefficient of static friction is small. In addition, the non-printing areas 6 and 6 in which the low-slip processed surfaces 7 and 7 are formed are at least two opposite edges of the printing surface 2, so that there is no problem in printing on the printing surface 2. Further, since the low slip processing surfaces 7 and 7 are formed in the non-printing areas 6 and 6 on at least two opposing edges of the printing surface 2, the form sheet 1 is loaded on the sheet feeding device 10 (see FIG. 4). Regardless of the front / rear / right / left orientation, the low-slip processed surface 7, 7 (see FIG. 5 (a)) or one low-slip processed surface 7 (see FIG. 5 (b)) with respect to the feed roller 9. ) Evenly contact each other, and paper feeding by the feed roller 9 can be performed smoothly.

  FIG. 10 shows a form sheet 1 according to a modified embodiment of the present invention. This form sheet 1 has a non-printing area 6 only on one edge of the printing surface 2, and the non-printing area 6 has a low slip processing surface 7. Formed. The low slip surface 7 has a printing layer 8 (see FIG. 3) made of the above-described 20 to 70% halftone dot printing, embossing (see FIG. 7) having a large number of protrusions 12, or a plurality of transparent portions. It is comprised by the hole 13 (refer FIG. 9).

  In such a configuration, as shown in FIG. 11, a plurality of form sheets 1 are set on a hopper 11 of a sheet feeding device 10 including a feed roller 9 equipped in an optical reading device or a printing device, and paper is fed. When set, the low slipperiness processing surface 7 is set so as to be positioned on the front side in the paper feeding direction F, so that the entire lower slipperiness processing surface 7 comes into contact with the feed roller 9 evenly. Further, the smoothness and static friction coefficient of the non-printing area 6 are substantially equal to those of the high-quality paper and the OCR paper by the low slip processing surface 7, so that the paper sheets 1 and 1 can be mutually connected with high smoothness as in the past. Can be pulled out one by one in order from the form paper 1 positioned at the top, so that double feed caused by contact and misfeed caused by sliding of the feed roller 9 due to a small static friction coefficient can be prevented. In addition, since the low slip processing surface 7 is formed in the non-printing area 6 on one edge of the printing surface 2, there is no problem in printing on the printing surface 2.

It is a top view of the form paper 1 concerning a 1st Example. FIG. 3 is a longitudinal sectional view of a thermal paper constituting the form paper 1. It is a fragmentary sectional view of the principal part of the form paper 1 concerning a 1st Example. FIG. 6 is an explanatory diagram illustrating a state in which a plurality of form sheets 1 are set in a sheet feeding device 10. (A) is a schematic plan view showing a state in which the form paper 1 is set so that the low slip processing surfaces 7 and 7 are located on both the left and right sides in the paper feed direction F, and (b) is low before and after the paper feed direction F. It is a schematic plan view which shows the state which set the form paper 1 so that the slipperiness processing surfaces 7 and 7 may be located. It is a top view of the form paper 1 concerning a 2nd Example. It is a fragmentary sectional view of the principal part of form paper 1 same as the above. It is a top view of the form paper 1 concerning a 3rd Example. It is a fragmentary sectional view of the principal part of form paper 1 same as the above. It is a top view of the form paper 1 concerning a modification. FIG. 6 is an explanatory diagram illustrating a state in which a plurality of form sheets 1 are set in a sheet feeding device 10. It is explanatory drawing which shows the state which set the conventional form paper c to the paper feeder a.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Form paper 2 Printing surface 4 Thermosensitive coloring layer 6 Non-printing area 7 Low slip processing surface 8 Printing layer 9 Feed roller 10 Paper feeder 12 Protrusion (embossing)
13 Through hole

Claims (5)

In a form paper having a printing surface with a high smoothness and a small coefficient of static friction, fed by a paper feeder equipped with a feed roller,
A non-printing area is formed on at least one edge of the printing surface in contact with the feed roller, and a low-sliding surface that reduces the smoothness and increases the coefficient of static friction is formed in the non-printing area. Form paper characterized by that.   2. The form sheet according to claim 1, wherein the low-slip processed surface is formed by forming a printing layer composed of 20-70% halftone dot printing.   2. The form sheet according to claim 1, wherein the low slip surface is an embossed surface.   The form sheet according to claim 1, wherein the low slip surface has a plurality of through holes. The form paper according to any one of claims 1 to 4, wherein the printing surface is provided with a thermosensitive coloring layer.

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