FI81304C - FOERFARANDE, JAEMTE ETT PAPPER, FOER FRAMSTAELLNING AV ETT SJAELVKOPIERANDE TRYCKALSTER. - Google Patents

Description

1 81304

The present invention relates to a method and a paper for producing a self-copying printed product comprising at least two sheets combined in a so-called form set or the like.

In this case, we refer primarily to so-called form sets, which typically contain three to four sheets of self-copying paper, the purpose of which is to write the information by hand or by machine on the top sheet, in which case it is copied to other sheets.

In this type of printed product, which comprises, for example, four sheets, the top sheet is coated on the underside with a so-called coated back layer (CB layer), the bottom sheet is coated on the front side with a so-called coated front layer (CF layer) and the two intervening sheets are on the upper side. coated on the side with a CF layer and on the underside with a CB layer.

According to the prior art, the properties of the self-copying layer are such that when pressure is applied to the CB layer, such as that caused by the tip of the pen, and the layer is in contact with the CF layer, the CB layer is chemically combined with the substances in the CF layer. exposed in at least CF-coated paper.

To produce such forms, a first paper web is therefore coated on one side with a CF layer, a second paper web on one side with a CB layer, and a third paper web on the other side with a CB layer and on the opposite side with a CF layer.

The paper webs are then sequentially placed in a printing press, 2 81 304 where the paper webs are provided with printed text, etc., after which the paper web thus printed is divided into longitudinal narrower paper webs corresponding to the width of the intended form and wound.

After said three paper webs are printed and wound, the top side paper roll, the bottom side paper roll and the required number of tabbed paper rolls are transferred to a splicing machine where the sheets in the rolls are joined together and cut to a length corresponding to the intended form set. In this case, the papers are also joined together into a form set.

The method of making such forms is thus very multi-step, partly because different rolls of differently coated papers are needed, partly because the paper printed and divided into narrower paper webs has to be placed in an interlacing machine.

Such manufacture usually starts with paper coated by a paper mill or the like, which is supplied in rolls having a width many times the width of the imaginary form set.

As a result, a large number of top-of-the-line papers and a large number of sub-sheet papers are obtained from such a roll. The technology therefore contributes to the difficulty of producing self-copying printed matter in smaller editions at a reasonable cost. Another reason for the difficulty in producing printed products in smaller editions at a reasonable cost is that the above-mentioned multi-stage processing must be performed regardless of the size of the edition.

The present invention refers to a method that is substantially simpler than known methods for making self-copying forms or the like.

3 81304

The invention further means paper, the production of which is included in the method according to the invention.

The present invention therefore relates to a method for producing a self-copying printed product comprising at least two sheets combined into a so-called form sheet or the like, which sheets are coated with a copying layer, which printed products are formed by combining copied-coated and printed paper sheets. or in a similar order, after which the paper webs are partially fastened together and cut to a length corresponding to the length of the form set, wherein said paper webs are made so that a wide paper web having a width corresponding to the combined width of at least one printed product is coated with said layer. divided into two or more longitudinal narrow webs of paper, each corresponding to the width of the finished the width of the article and the method are characterized in that said wide paper web is coated with equal width web portions parallel to the paper web corresponding to said paper webs so that the web portion intended to form the top sheet of the printed product is coated on the underside with a first type coating. layer (CB layer) that the web part intended to form the bottom sheet is coated on the upper side with a coating layer of another type, namely the so-called coated front layer (CF layer), and that the web part (s) intended to form the tabs , is coated on the top side with a copying layer of said second type (CF layer) and on the underside of a coating layer of said first type (CB layer).

The invention further relates to a coated paper for producing a self-copying printed product comprising at least 4,830,44 two sheets coated with a copying layer, the paper consisting of a paper web having a width corresponding to the combined width of the sheets contained in the at least one printed product, characterized in that the paper is characterized by as web portions parallel to the paper web, each width corresponding to the width of the finished printed product so that the web portion intended for use as the top sheet of the printed product is coated on its underside with a first type copying layer, namely a so-called coated back layer (CB layer); , which is intended to be used as the bottom sheet of a printed product, is coated on the upper side with a copy layer of another type, namely a so-called coated front layer (CF layer), j a that it or those web portions intended to be used as tabs are coated on the upper side with a copying layer of said second type (CF layer) and on the underside of a copying layer of said first type (CB layer).

The invention will now be described in more detail with reference to the accompanying schematic drawing, in which Figure 1 shows a highly schematic view of an apparatus for making paper according to the invention, Figure 2 shows a highly schematic view of an apparatus for producing a self-copying printed product from paper made in Figure 1.

Figure 1 shows very schematically an apparatus for producing a paper according to the invention. The production of paper is included in the method according to the invention for producing a self-copying printed product.

Preferably, a self-copying printed product, 5 81304, is of the form set type comprising at least two sheets coated with a copy layer.

However, the method according to the invention can be used to produce other products, such as web-like printed products, for example multi-ply papers for a computer printer, etc.

Thus, the invention is not limited to any particular type of self-copying printed matter, but the invention is presented below in connection with a formulation comprising four sheets, namely a cover sheet, a leaflet and two tabs.

In Fig. 1, the number 1 denotes a first roll of wide paper forming a wide paper web 2 through a coating apparatus, generally indicated at 3 in Fig. 1. The number 4 denotes a second roll of paper coated with copying layers.

Figure 2 also shows very schematically an apparatus for producing a printed product starting from a coated paper according to the invention.

In Fig. 2, the numbers 5, 6 and 7 denote printing stations in which the paper web 2 is provided with a print, such as text, borders, etc., in one or more colors. The number 8 denotes a device for dividing the paper web 2 into separate narrow paper webs 9, 10, 11, 12.

The device for joining the web parts 9-12 is arranged in such a way that a plurality of paper webs 9-12 are superimposed in the desired order, after which the paper webs are partially fastened to each other in the device 14 and cut with scissors 15 to a length

According to the method of the invention, narrow, coated paper webs 9-12 are produced by coating a wide paper web 2 having a width corresponding to the combined width of the sheets contained in at least one printed product, parallel to the paper web 2 in equally wide web portions 16, 17, 18, 19. the width corresponds to the width of the finished printed product 13.

Each web portion is coated with a copy layer on one side, opposite side, or both sides of the paper web 2, depending on whether said web portion 16-19 is intended to form the top sheet, bottom sheet, or tab of the finished printed product 13.

According to a preferred embodiment, the paper web 2 is coated with two types of copying layers. The first type is the so-called coated back layer (CB layer) and the second type is the so-called coated front layer (CF layer). The CB layer and the CF layer are as shown at the beginning. When such copying layers are used, said web portions 16-19 are coated such that the web portion 16 intended to form the top sheet of the printed product is coated on the underside with a CB layer, the web portion 19 intended to form the bottom sheet is coated on the top side with a CF layer, and the web portions are coated , 18, which are intended to form tabs, are coated on the upper side with a CF layer and on the lower side with a CB layer.

This is preferably carried out by two coating stations 22, 23, one of which is intended for CF coating and the other 23 is intended for CB coating. In the example shown, in the first position 22, the upper side of the web parts 17, 18 and 19 is coated with a CF coating on a roll 24. Thus, the nanoparticle 16 is not coated in this position. In the second position 23, the underside of the web portions 16, 17 and 18 is coated with a CB coating by a roller 25. Thus, the web portion 19 is not coated in this position.

The rollers 23, 24 are axially divided into at least two blocks, but preferably as many blocks as the desired number of web sections, i.e. in the example shown into four blocks 16, 17, 18, 19, whereby each block can be coated or prevented from performing independently. whether or not coating is performed on other blocks.

The coating technique itself as well as the chemical composition of the coating layers is a well known technique, so it will not be described in more detail here.

The coated paper 4 is thus formed by a wide paper web 2 which, as longitudinal web portions 16-19, is coated with copying layers depending on where said web portion will be located in the printed product.

According to a preferred embodiment of the invention, the width of the wide paper web 2 is equal to the combined width of the sheets contained in a single printed product, in which the the paper web portion 17, 18 located between the web portions 16, 19 located thereon is coated on both sides. As a result, the entire paper web is consumed to produce a particular printed product, which facilitates production planning.

It is often the case that a self-copying printed product is intended to copy text only on part of its surface and not to copy text that is written on other parts of its surface. For this purpose, one or more of said web portions 16, 19 are then only partially coated on one side 20 or on the opposite side 21 of the wide paper web 2.

A coating apparatus such as that shown in Figure 1 normally has a capacity which is considerably greater, 8 81 304, e.g. 3 times greater than the capacity of the printing machine schematically shown in Figure 2. For this reason, it is advantageous to roll the coated paper 4 and transfer such a roll of paper to the printing machine for finishing the printed product. Thus, one coating device can be used to coat the paper, while e.g. three printing machines are used to finish the printed products.

Of course, the coating device can also be built together with the printing machine, whereby the paper web passes uninterruptedly through the entire device.

When the coated paper web is provided with printing, the paper web 2 according to the invention is divided into two or more longitudinal narrow paper webs 9, 10, 11, 12, each of these narrow paper webs 9-12 corresponding to the web part 16-19. The narrow paper webs 9-12 are brought together, fastened together and cut, whereby the intended printed product is finished.

It will be appreciated that the present invention overcomes the disadvantages set out at the outset. The invention enables the highly rational production of self-copying printed products. By means of the invention, it is not necessary to start from wide paper webs with a certain coating, which are printed, divided into longitudinal blocks and wound on as many rolls as there are blocks, after which several such different rolls are mounted on a machine to combine different blocks into a printed product.

Thus, coating the paper 1 for the intended printed product in a special way saves some working moments. In addition, storage costs are reduced because there is no need to stock a large number of rolls with differently coated paper.

Another essential advantage is that the coating device is adjustable so that when a certain distance of the paper 1 is coated with it in a certain way, it is adjusted

II

9 81 304 this paper in another way. This also contributes to the ability to produce relatively small editions of self-copying printed materials at a reasonable cost.

The present invention is, of course, not limited to the manufacture of forms or to the manufacture of printed matter having four sheets. The invention is, of course, applicable to the manufacture of all kinds of printed matter, including differently coated sheets.

Thus, the present invention cannot be considered to be limited to the embodiments set forth above, but may vary within the scope of the appended claims.

Claims (5)

A method for producing a self-copying printing article comprising at least two blades mounted to a so-called the sheets or the like, which sheets are coated with a copy layer, which print articles are formed by combining paper webs which are coated with copy layers and printed to lie on top of one another in the intended order in a form set or the corresponding, whereupon the paper webs are partially attached to each other and cut off to a length corresponding to the length of a blanket set, wherein said paper webs (9-12) are formed by coating a wide paper web (2), with a width corresponding to the total width of the leaves contained in at least one printing article (13), with said layer and a like coated paper web (2) before said joining to a printing article (13) is divided into two or more longitudinally narrow paper webs (9-12), each having a width corresponding to the width of a finished printing paper (13), characterized in that said wide paper web (2) is coated in parallel paper web (2) with equally wide web portions (16-19) corresponding to said paper webs (9-12) in such a way that a web portion (16) intended to constitute the topmost sheet of a printing article on its underside (21) is coated with a copy layer of a first type, namely a known so-called coated back layer (CB layer), that a web portion (19) intended to constitute the bottom sheet on its upper side (20) is coated with a copy layer of a second type, namely a so-called known coated front layer (CF layer), and that the web portion (s) (17, 18) intended to form intermediate sheets are coated on their upper side (20) with a copy layer of said second type (CF layer) and on their underside (21) having a copy layer of said first type (CB layer). Il 13 81 304 Method according to Claim 1, characterized in that said wide paper web (2) has a width equal to the total width of the leaves contained in only one printing scrap (13) and that the paper web (2) at the web portion (16; 19) along its one side edge is only coated on one side, that the paper web (2) at the web portion along its other side edge (19; 16) is only coated on the other side and that the portion of the paper web (17, 18) located between the said along the side edges the web portions (16, 19) are coated on both sides. Method according to claim 1 or 2, characterized in that one or more of said web portions (16-19) is only partially coated on one or other side of the wide paper web (2). 4. Paper for producing a self-copy printing article comprising at least two sheets, said sheets being coated with a copy layer, said paper being a paper web (4) having a width corresponding to the total width of the sheets contained in at least one printing article (13) , characterized in that the paper web is coated in parallel to the paper web (4) equally wide web portions (16-19), each web portions (16-19) each having a width corresponding to the width of a finished print article (13), in such a way that a web portion (16) intended to be used for the topmost blade of a printing article (13) is coated on its underside (21) with a copy layer of a first type, namely a coated back layer (CB layer), that a web portion (19) intended to be used for the bottom sheet of a printing article is coated on its upper side (20) with a copy layer of a second type, namely a so-called. coated front layer (CF layer) and that the web portion (s) (17, 18) intended for use as intermediate sheets are coated on their upper side (20) with a copy layer of said second type (CF layer) and their underside (21) having a copy layer of said first type (CB layer). 14 81304 Paper according to claim 4, characterized in that one or more of said web portions (16-19) are only partially coated, with a copy layer, on one or the other side of the wide paper web (4).