JPS58217395A - Paper for writing - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to writing paper, and more particularly to reusable flip charts.

When giving a class or lecture, it is common to want to show documents and diagrams to the audience. Perhaps the oldest way to do this is to write on a blackboard with chalk. If this ordinary brakteis is followed, the writing will take place in the audience. However, this is a slow process and is considered objectionable by those who are not suited to writing or drawing on blackboards. A particular solution to this difficulty is to prepare the material sequentially, but this has two drawbacks. First, there is a limit to the number of blackboards that can be installed, and second, writing still has to be done on a blackboard, which is a much more difficult task than writing on paper. There are situations in which completely immutable records may be used. For example, a bulletin board is prepared by painting strips on a chalkboard that is left so that only names can be added. This has the significant advantage over repeated work that only parts of the message need be written on each fold. If, for example, there are many possible messages to be conveyed in a class, the number of blackboards that can be provided is limited, so messages written in paint are severely limited. A modern variant of the blackboard is the whiteboard. This is usually a white plastic board on which you can write with a felt-tip pen. Probably easier to use than a blackboard and
It presents less difficulty to those who are not good at writing legible documents and diagrams, and does not create large amounts of chalk dust. If you have a suitable choice of chalkboard and pen, messages can be easily erased by wiping them with a cloth. A permanent message can be written on a whiteboard by using the selected type of writing implement, if the board material is suitable. But the main drawback about blackboards remains. In other words, only a few whiteboards are provided. When many messages have to be expressed in rapid succession, a completely different device, the Philip chart (
flip chart) is used. In its simplest form, it comprises a considerable number of sheets of paper which are joined together by being fixed to a rigid backing board along one edge and attached to a rod or plate; Gain support among the audience by such things. Each paper has a message on the surface facing the audience. When the seven sheets are finished and the next sheet is requested, the first sheet is passed over the flip chart to form the backing sheet and the second sheet is exposed for viewing. This device is currently very commonly used. A considerable number of papers can be combined into one 7-lip
It can be attached to form a chart so that changes in the subject matter can be illustrated in rapid succession. It is possible to add diagrams during a lesson or lecture, but once this has been done it is almost impossible to restore the diagram to its original state. The chart does not easily remove what is written on it, especially when it comes to documents or diagrams that take up a considerable amount of real estate.

It is an object of this invention to provide a reusable flip chart that avoids many of the difficulties hitherto encountered, or at least provides the public with a useful choice.

Therefore, in a first aspect, the present invention is broadly applicable to a synthetic resin film laminated on one surface thereof.
cs fj-1m,) and a layer of opaque material adhered to the other surface,
This invention is broadly supported by being joined together by their top edges as defined above, so that the chart as a whole can be presented to the audience, and each paper of the Philips chart having a plurality of papers with a surface covered with synthetic resin facing.

In a third aspect, the invention broadly relates to laminating a synthetic resin film on one surface of a sheet of paper.
The method of forming a laminated sheet includes the steps of: nating) and coating the other side of the paper sheet with an opaque material.

In a third aspect, the invention broadly comprises a number of sheets of thin, flexible material that are joined together and supported by two edges so that the chart as a whole is presented to an audience and viewed. The exposed sheet can then go over the edges, thus exposing the next sheet, where each sheet is opaque and the first sheet remains opaque even if its surface is wiped with a dry or damp cloth. taken and permanently preserved a printed or drawn diagram or written text on a special writing material. and further has a surface adapted to take up printed or drawn diagrams or written text on a second special writing material, the second writing material being entirely Flip charts include those that can be wiped off with a dry or damp cloth.

The above provides a broad description of the invention and its preferred form is explained by way of example.

In its preferred form, the invention consists in a thin film of polypropylene applied to one side of the paper and a mixture of titanium dioxide printing ink, resin and aluminum powder applied to the opposite side.

The synthetic resin film is prepared by passing the paper and film together through the nip of a pair of heated rollers and applying an adhesive material evenly to the paper surface immediately before passing through the nip. is made by ensuring that the paper is adhered to the paper. The paper is then directed past an air knife into which a liquid containing a mixture of ink, resin and aluminum powder is introduced, so that the mixture is evenly applied over the entire surface of the paper. Such a mixture dries quickly and the material is ready for cutting into sheets.

Accordingly, the present invention provides a sheet with a smooth synthetic resin surface on which writing can be performed. Anything written on synthetic resin surfaces using water-based or dry or other non-alcoholic writing materials can be wiped off with a cloth, but anything written using alcohol-based writing materials can be wiped off. Cloths also cannot be wiped off unless they have been impregnated with an alcoholic material. In this method, the writing material can be used in combination with a permanent marking elbow ink and a temporary marking ink.

Although almost any synthetic resin surface can be used, polypropylene has advantages over other synthetic resin surfaces in that it has an inert, non-porous surface and is dent resistant.

Paper-polypropylene leaf plastics have one advantage over regular polypropylene sheets in that they are less expensive, lighter weight, and do not have the same tendency to curl that flat sheets of synthetic resins have.

The coating of opaque material on the back side of the paper ensures that when the sheet is used in a seven-lip chart or the like, marks on the sheet immediately below the top sheet will not be revealed through the top sheet. white titanium dioxide, printing ink, resin,
The mixture of aluminum powder also has advantages over most other opaque materials in that it does not add its own color to the sheet and also provides a very effective barrier to light passing through the sheet. Regardless, any opaque material can be used. However, usually white printing ink is used, or other inks, paints or coating materials are used.

The use of transparent polypropylene means that the paper's natural white color provides a suitable background for any marks placed on the sheet. However, when it is desired to provide a colored writing surface, colored paper or colored synthetic resins can be used.

Optionally, if transparent polypropylene is used, the sheet of paper is required as a permanent part of the display chart, and the marks printed on it can be printed on the paper and remain a permanent feature of the chart. .

Although the oblique writing material of this invention is particularly suitable for use in flip charts, it can also be used for single charts or any other display purpose. In a believed form, a sheet of rigid cardboard or any material with similar physical properties is 111t'fA/size. However, this size can be selected depending on the audience and position. The backing sheet is arranged to be supported in a conventional manner. When it is supported from above, the arrangement must be reduced so that a sheet of the same size as the backing sheet is passed over one portion of the backing sheet.

A sheet of the same size as the backing sheet, or smaller if required, is then prepared. Each of these sheets must be flexible so that it can be passed from the front to the back of the flip chart without detaching, and it must be opaque and each without underlying sheets having any distractions. Must be able to read sheet documents and drawings. The surface of the sheet can be removed and, when wiped with a dry or damp cloth, a message stamped on it with the first type of writing material can remain, and furthermore, although it can be removed, such The message on the second writing material must not be able to remain under wiping. The desired number of sheets are taken, the messages are placed on them and they are arranged in the order in which the messages are to be shown. All the sheets in their proper order are then attached to the top of the backing sheet, the flip chart being properly supported, and a felt tip pen or other means of applying a second writing material to the sheet. A cloth, either dry or moistened with a suitable liquid for removing the second writing material, is similarly prepared.

A standard reusable 7-lip chart is formed, for example, by a board with 70 sheets of writing surface material attached with elastic material in the form of 7 strips of the type known as file binders; It is proposed that the entirety be stored in a plastic envelope for safekeeping. A fairly large number of such flip charts can be stored, for example in the space occupied by 2-3 blacks.

The sheets cited are usually white in color, in which case it is proposed that they should be known as white sheets. They can have at least two possible types of structure. In the first, the opaque material and the water-resistant film are blended together, preferably while wet, and formed into films of the same thickness by any suitable method known in the art.

Another preferred method is to preheat the sheet in order to take a sheet of paper, which may be white or colored, and to laminate over it a layer of transparent, water-resistant synthetic resin, such as polypropylene. Alcohol-based inks can be found to be stable in polypropylene. They remain when the polypropylene is wiped with a damp cloth. Dri-Wipe for messages to be wiped.
) are also available. Other water-based inks can also be used.

A shift of a number of thin flexible materials, the upper edges of which are joined together and supported, so that the sheet is shown to the chart audience as a whole and is exposed to viewing. can pass over the edges of the paper and thus indicate the next sheet, in which each sheet is opaque and printed with the first special writing material, even if its surface is wiped with a dry or damp cloth. a second special writing adapted to selectively remove and permanently preserve drawn or drawn figures or written words, and which can be completely wiped away by wiping with a dry or damp cloth; A sheet having a surface adapted to pick up a printed or drawn figure or written text on the material.

- Flip chart with

In the chart above, the first writing material is an alcoholic writing material.

In the chart above, the second writing material is a Dri-Wipe writing material.

In the chart above, the second writing material is an aqueous writing material'.

In the chart above, each sheet contains paper laminated with a transparent water-resistant film.

In the chart above, the water-resistant film is polypropylene.

Synthesis 41M A method of forming a laminated sheet comprising the steps of laminating a fatty film on one side of a sheet of paper and coating the opposite side of the paper with an opaque material.

In the above method, the step of laminating the synthetic resin and paper consists of passing each sheet between a pair of heated rollers and inserting an adhesive material between the sheets before they are pressed together. It must include that.

The above method, wherein the step of applying the opaque material comprises directing the opaque material in liquid form into the path of an air knife guided by the sheet of paper.

In the above method, the step of applying the opaque material comprises spraying it on.

In the above method, the step of applying the opaque material includes printing it over a mesh roller.

Patent application by Planhorse International Voluntary amendment by Kazuo Wakasugi, Commissioner of the Patent Office (Examiner of the Patent Office) 1. Case description 1980 Patent M No. 3797II
No. 2, Name of the invention Writing paper 3, Relationship with the case of the person making the amendment Name of the patent applicant 5. Date of the amendment order (Showa date, month, day, Showa year)
Month 11) 6. Number of inventions increased by amendment

Claims (1)

[Claims] (Writing paper characterized in that it consists of a sheet of paper with a synthetic ml fat film laminated on one surface and a layer of opaque material adhered to the other surface. (2) The writing paper according to claim 1, wherein the synthetic resin film is polypropylene. (The writing paper according to claim 1 or 2, wherein the synthetic resin film is heated and laminated on paper. (4) The writing paper according to claim 1, 2 or 3, wherein the opaque material contains white printing ink. (5) The writing paper according to claim 1, wherein the ink is titanium dioxide ink. Writing paper according to claim q. (G) Writing paper according to claim 1 or claim s, wherein the ink is mixed with a resin containing a silver powder. (A patent in which the powder is aluminum powder) A writing paper according to claim no.