ERASURE BOARD WITH SEVERAL WRITING FIELDS

Abstract: An erasure board with several writing fields (6), whereby each field is erased independently of the other fields during the separation of a writing layer (3, 4) from an underlayer (5). The underlayer is a bottom plate (5) which is divided into a number of tongues (7) corresponding to the number of writing fields (6). Between the bottom plate and the frame (1) is placed a writing layer which consists, for example, of waxed paper (4), over which is placed a translucent writing plate (3). By means of dividing pieces (2), the frame (1) divides the writing layer (3, 4) into a number of writing fields. The information noted down in the fields can be erased completely or partly by pressing down the tongue (7) under each of the fields. The board consists of simple parts moulded in plastic, the result being a very simple and cheap construction. The individual parts of the construction are assembled by merely placing them on top of one another in that sequence in which they enter into the construction.

Description: ERASURE BOARD WITH SEVERAL WRITING FIELDS •*> This invention relates to an erasure board with sev¬ eral writing fields, where each writing field can be 5 erased independently of the remainder during the sep¬ aration of an underlayer from a writing layer. Such erasure boards can be used whenever it is neces¬ sary to maintain a check on smaller stocks where the 10 individual items in the stock are replaced or chang¬ ed. As an example of such a stock can be mentioned the contents of a deep freezer, a wine cellar, a book collection, stocks held in smaller concerns etc. 15 One can write down new information in a field from which one has just erased other information, thus en¬ abling all the useful information to be collected in as small an area as possible. If the corresponding work is to be carried out using a pencil and paper, 20 one must use either many loose sheets o__ paper or also an indiarubber. An erasure board with several writing fields and an • erasure slide for each writing field is known from 25 the description provided in USA patent no. 2,198,347. The constructions known from this patent are, however, quite complicated, which makes such an erasure board expensive to produce. Moreover, the adhesive ability must not be too great, the reason being that in such 30 a case it is difficult * to lead the erasure slide in between the waxed paper and the bottom. If the adhe¬ sive ability is not great enough, the result is often that the board erases the contents by itself, in that the waxed paper simply loosens itself from the bottom O PI WIPO prematurely. From the description of USA patent no. 1,555,642 is known a scribbling pad in the form of an erasure board whereby one erases the information written down by lifting the writing layer free from the underlayer. If the writing layer is soft and flexible, one can choose to erase certain parts of the written informa¬ tion, in that an erasure takes place typically from one of the free corners of »the board. The object of the present invention is to provide an erasure board of the kind presented in the introduc¬ tion to claim 1, but of such a design that it consists of very few parts capable of simple assembly to form __- a complete board, and where each writing field can be totally or partly erased without any influence what¬ soever on the entries in the other fields. This is achieved by designing the erasure board as characterized in claim 1. The erasure board consists of only three parts, name¬ ly a writing layer, a bottom plate and a frame, in that it is not at all necessary to use any erasure slide/slides. The assembly is effected quite simply by placing the parts on top of each other in the se¬ quence in which they form part of the construction. Moreover, with the constructuon shown it. is possible to produce a very flat and compact erasure board with which one can use wax adhesives which ensure that the information is not erased until desired by the user. Tongues are used as the writing underlayer, and when the written information is to be erased, one presses the free end of the tongue downwards, whereby the writing layer and the tongue are separated and the text disappears. Thus it is actually only the user's finger strength which sets an upper limit on the str- ength of the wax adhesive. By designing the erasure board, according to the in¬ vention as presented in claim 2, a very simple con¬ struction is achieved whereby one can easily influ- ence the tongues one at a time. The frame can be designed as presented in claim 3 , whereby optimum utilization of the whole of the era¬ sure- writing-surface is achieved, while at the same time the board is given a pleasant and attractive ap¬ pearance. By designing the frame as presented in claim 4, one achieves the result that the frame covers the narrow . spaces between the individual erasure surfaces. It is simply not possible to write outside the erasable fields. In the first-mentioned USA patent no. 2,198, 347, there is no clear marking of the individual fields. If, for example, there was imprinted such a marking, there would still be nothing to prevent the user from writing across two or more fields accident¬ ally. It is expedient and cheap to produce the two fixed parts, the frame and the bottom plate, as individual units of plastic as presented in claim 5. Moreover, this makes it possible to assemble the bottom part and the frame by, for example, heat-welding or gluing with a solvent. MPI The invention will now be described with reference to the drawing, which shows an exploded view of an era¬ sure board according to the invention. The erasure board consists of a bottom plate 5 which is divided into a number of tongues 7 by spaces 9. Each tongue 7 comprises the underlayer for one writ¬ ing field, thus making it possible to erase the fields individually. The tongue can be coloured or white. The colouring can be implemented by using a coloured material, for example coloured plastic, or a coating of colour can be applied. The bottom plate 5 also has supporting end pieces 8, which also have a function in connection with the as¬ sembly of the individual parts to form a board. From the drawing it will also be seen that in the example shown, all the tongues 7 are secured at the same side of the bottom plate 5. This does not necessarily al- ways have to be the case, in that the bottom plate can, for example, be made in the form of a frame, so that every other tongue is secured to one side of the frame, while each alternate tongue is secured to the other side of the frame. Over the bottom plate is placed a writing layer. The writing layer can be executed in different ways, in that there are several ways in which an erasure board can be produced. For example, the writing layer can be executed as shown in the drawing, consisting of a transparent writing plate 3 and a sheet of waxed pa¬ per 4. The writing layer has a clear, transparent plate, the function of which is to protect the waxed paper 4 so that it does not get worn or ruined. The OMPI waxed paper is translucent and has the adhering side with wax downwards against the bottom plate 5. This construction is the traditional and generally-known erasure board construction. The waxed paper must be relatively soft and flexible in order to fulfil its function of adhering only where pressure has been ap¬ plied by the writing utensil. It must, therefore, be protected by a wear larer 3. One can, however, when employing a newly introduced plastic foil, completely avoid the use of the waxed paper, the reason being that certain kinds of plastic "adhere" or "stick" to other materials when they are brought into very close contact with each other. If one uses such a foil as writing layer, it will adhere or stick to the bottom plate only where it is mechan¬ ically pressed down by the writing utensil. The use of one layer as writing layer is therefore sufficient. All that remains now is to place the frame 1 over the writing layer, for example the transparent writing plate 3, and the board is assembled and ready for use. Between each writing field, the frame has a dividing piece 2, thus preventing the user from writing across several fields, and also serving to prevent writing on that area of the bottom plate which is comprised of the spaces 9 between the tongues 7. The final assembly can be carried out by gluing the edges of the frame to the bottom plate with glue, or merely with a solvent for the kind plastic of which the parts are produced. The assembly can also be car¬ ried out by heat-welding of the edges, by rivetting or by means of any other- method of permanent assembly. O PI If required, holding elements can be provided in the edges of the frame and the bottom plate, thus allow¬ ing the parts to be fitted together and separated as desired. It will appear directly from the drawing that the assembly process consists only of the same number of operations as there are parts in the board. What is thus involved is a particularly cheap construction which, in addition, is very well-suited to assembly by machine, the reason being that the parts merely need to be placed on top of one another and then as¬ sembled. The bottom plate and the frame are shaped in such a manner that they are simple to mould in plastic, whereby one achieves both a cheap product and a pro¬ duct which, has an attractive appearance. Furthermore, with the design" as shown it is possible to produce a very flat and compact construction having a thickness of only a few millimetres. The parts can, for example, be produced in different colours, and the broad edges of the frame can " be provided with advertisements, in¬ structions for use or other text or pictures. By merely pressing down the tip of the tongue 7 which, for example, can extend a.little beyond the edge of the frame 1, one can completely or partly erase the information written in the writing field. If, for ex- ample, one writes the type of goods in that side of the writing field where the tongue is secured to the bottom plate, and one writes the amount of goods lon¬ ger out towards the free end of the tongue, by partial pressing down of the tongue one can content oneself -BUR OM with erasing the indicated amount. This is expedient in connection with, for example, the keeping of stock accounts, where the amounts are changed frequently. The more one wishes to erase from the field, the more one depresses the tongue. After the desired erasure, the tongue is released and it returns to its initial position. 01V.PI

Claims: C L A I M S 1. Erasure board with several writing fields (6) , whereby each field can be erased independently of the remaining fields during the separation of an under¬ layer from a writing layer, c h a r a c t e r i z e d in that the underlayer is a bottom plate (5) which is divided into a number of tongues (7) corresponding to the number of writing fields, said bottom plate being covered by a writing layer (3, 4) , on top of which is placed a frame (1) which divides the board ' up into writing fields (6). ■ : 2. Erasure board according to claim 1, c h a r a c ¬ t e r i z e d in that all the bottom plate's tongues (7) are firmly secured to the same side of the bottom plate (5) . 3. Erasure board according to claims 1 and 2, c h a r a c t e r i z e d in that the frame (1) , by means of dividing pieces (2) , divides the writing layer (3, 4) into rectangular writing fields (6) . 4. Erasure board according to claim 3, c h a r a c ¬ t e r i z e d in that the dividing pieces (2) have the same or a slightly greater breadth than the spac- es (9) between the tongues (7) . 5. Erasure board according to claims 1 to 4, c h a r a c t e r i z e d in that the bottom plate (5) with the tongues (7) and the frame (1) with div- iding pieces (2) are in the form of separately moulded plastic units. -^U EΛi OMPI

Inventors: HOLM-PEDERSEN LARS, HOLM-PEDERSEN, LARS
Applicants: HOLM PEDERSEN LARS, HOLM-PEDERSEN, LARS
Application year: 1983
Main classification: B43L1
IPC codes: B43L1