WO2000016983A1

WO2000016983A1 - Method for coding of a web-like material to be processed further

Info

Publication number: WO2000016983A1
Application number: PCT/FI1999/000776
Authority: WO
Inventors: Timo Richard Nyberg; Jan Peter Erik Eskolin; Emilie Wastyn; Dominique Kilgour
Original assignee: Timo Richard Nyberg; Jan Peter Erik Eskolin; Emilie Wastyn; Dominique Kilgour
Priority date: 1998-09-21
Filing date: 1999-09-21
Publication date: 2000-03-30
Also published as: AU5865699A; FI982022A0; FI104242B; FI104242B1

Abstract

Coding of a web-like material to be processed further, whereat an invisible identification code concerning said material is applied to at least one face of the web-like material. The code may include data essential in view of further processing of the web-like material. The code in accordance with the invention extends from edge to edge on the web, as a rule, as a continuous code. In the method in accordance with the invention, the marking takes place in connection with the process of manufacture of the web-like material so that, for example, a roll similar to a roll or resembling a rider roll is used or by means of a procedure of a jet type.

Description

Method for coding of a web-like material to be processed further

The present invention concerns a method for coding of web-like materials, such as paper, board, plastic films, or equivalent, in which method at least one face of the web-like material is marked with an identification code concerning said material, which code may include information essential from the point of view of further processing of the web-like material, such as, for example, web material, colour, gloss, smoothness, thickness, brightness, opacity, etc. , in which method the marking takes place in connection with the process of production of the web-like material so that, for example, a roll resembling a roll or similar to a rider roll is used or so that a procedure of a jet type is employed.

Many different web-like materials and sheets made from web-like materials possess different properties, which affect their usability in further processing of said materials. If the apparatuses for further processing of web-like materials and of sheet-like materials cut from web-like materials could regulate the parameters that affect the final result of the processing in compliance with the material to be processed, the final result of processing would be substantially equal irrespective of the nature of the material to be processed. For example, when a colour picture is produced on a paper sheet, the colour of the paper has a decisive effect on the appearance of the picture produced as a result of the further processing. Likewise, the porosity of the paper has an effect in affecting the spreading of the colour on the paper.

Thus, by means of data concerning the properties of a sheet and provided on the web-like material itself or on a sheet-like material manufactured from the web-like material, it would be possible, considerably better than by now, to optimize the further processing and to regulate the parameters that affect the final result in the processing device itself. So far, the object of markings applied to the face of a web-like or sheet-like material has not been to provide the material with marks concerning the properties of the material to be marked. In stead, currently, there are methods in which markings are applied to the face of a web-like paper, which markings contain information, for example, on flaws or deficiencies in the web or on the web face. Further, an object of sheet marking methods currently in use has been to provide the sheet with a code or mark which includes information on the pattern or data or on the contents of the data contained on the sheet.

The object of the present invention is to provide a method for marking of a web-like material, in which method the marking takes place so that a, usually continuous and uniform, code that includes data concerning the web to be marked is applied by means of an agent substantially invisible to the human eye onto at least one face of the web. The marking takes place in connection with the process of production of the web-like material so that, for example, a roll similar to a roll or resembling a rider roll is used or by means of a procedure of a jet type.

In one exemplifying embodiment, the marking in accordance with the method is applied onto the web-like material so that code areas 1 that contain the same information, as shown in Fig. 1, are placed, as viewed in the cross direction of the web, at such a distance from one another that, irrespective of the sizes of the sheets that will be cut from the web in the further processing, in some area in the sheet produced on the sheet cutting, there is always a whole code area.

It is essential and inventive that the code can be applied across the whole paper, in which case it is easy to find the code. A corresponding coding extending across the whole face could not be applied with a visible marker agent, such as, e.g. , ink.

It is an advantage of the invention that a marking in accordance with the invention can be carried out readily, for example, by means of a flexo-type rider roll or by means of a procedure of a jet type. Such a marking method is advantageous and easy to introduce in existing processes of manufacture. It is a further advantage of the present invention that the code in accordance with the method of the invention is continuous, so that, owing to the continuous pattern on the roll, an invariable force is applied to the web, i.e. the marking does not produce vibrations, and the runnability of the web remains good in spite of the marking.

It is a further advantage of the invention that, as the marking is placed on the face of the web, the marking can be read highly readily by means of advantageous reading devices.

The invention is not restricted to the exemplifying embodiments of the invention described above, but many variations are possible within the scope of the inventive idea defined in the following patent claims.

Claims

Claims:

1. A method for coding of a web-like material to be processed further, characterized in that a code mark that is invisible to the human eye is provided on at least one face of the web, that the code mark extends from edge to edge on the web, as a rule, as a continuous code, and that the code mark includes information essential in view of further processing of the web-like material.

2. A method as claimed in claim 1, characterized in that the coding takes place by means of a rider roll of the flexo type.

3. A method as claimed in claims 1 and 2, characterized in that the coding takes place by means of a procedure of a jet type so that marker agent is sprayed onto the face of the web-like material.