US1512827A - Writing and drawing device - Google Patents

Description

Oct. 21 1924. 1,512,827

H. DEQUTSCH WRITING AND DRAWING DEVICE Filed July 28, 1925 4 Sheets-Sheet 1 Get. 21 1924.

H. DEUTSCH WRITING AND DRAWING DEVICE Filed July 28 4 Sheets-Sheet 2 Get. 21 1924. 1,512,827

H. DEUTSCH WRITING AND DRAWING DEVICE Filed July 28. 1923 4 Sheets-Sheet 5 m i Z1 6 H. DEUTSCH WRITING AND DRAWING DEVICE Filed July 28. 1923 4 Sheets-Sheet 4 h lll Oct. 21 1924.

Patented Oct. 21, 1924.

NITED STATES HERMANN DEUTSCH, F BERLIN-LICHTERFELDE, GERMANY.

WRITING AND DRAWING DEVICE.

Application filed July as, 1923. Serial No. 654,387.

i To all whom it'may concern:

Be it known that I, HERMANN DEUTSCH, residing at 11 Marienplatz, Berlin-Lichterfelde, Germany, have invented certain new and useful Improvements in Writing and Drawing Devices, of which the following is a specification.

Writing and drawing devices are known in which a diaphanous sheet of paper, fabric or the like is arranged above a dark-colored slightly adhesive, bottom layer. consisting of beeswax, paraflin wax or the like, and in. which the writing or drawing is produ"ed by pressing the paper sheet or the like against the adhesive bottom layer along the parts or lines to be made conspicuous by means of a style, so that these parts adhere to the bottom surface and the writing or drawing is thus made to appear in the color of the bottom adhesive surface. To obliterate the writing or drawing in the known devices the impressed sheet of paper or the like is simply lifted bodily from the adhesive bottom surface.

This invention relates to a writing and drawing device in which the marks are produced in the same manner as in the aforesaid device, but in which it is not necessary to lift the sheet of paper or the like from the adhesive surface into which parts of the paper have been impressed by the style. By this means the durability of the devi"e is increased and an improved construction is obtained.

In accordance with the invention an obliterating device in the form of a strip, string, wire or the like extends across the writing tablet and is located between the adhesive bottom surface'and the sheet of paper and the like and is arranged so as to be movable relatively to the paper and so that when it is moved it\ separates the adhering parts of the paper from the adhesive surface and thus obliterates the marks, writing, drawing .or the like that were produced by the impressure of the paper into the adhesive layer.

In a preferred form of the writing and drawing device according to the invention the adhesive bottom surface or layer with its superimposed diaphanous paper sheet or the like is arranged in the form of a unit adapted to slide in a fiat case similar to a camera plate holder whose front wall has an opening or window through which the tablet is visible. The tablet is arranged so that it can be drawn out almost entirely from the case like the cover of a camera plate holder. Arranged in the interior of the case so as to extend parallel to its open edge, and in the neighbourhood of this edge, is a strip or thread of any preferred material which passes between the paper sheet and the adhesive layer beneath it, so that when the .writing and drawing tablet, consisting of the adhesive bottom surface wit a paper sheet or the like stretched thereupon, is drawn out of the case, the obliterating strip or thread, by moving relatively to the writing tablet, separates the adhering parts of the sheet from the adhesive layer beneath it, thus causing the writing or drawing on the tablet to be obliterated. When the writing tablet is then pushed back into the case its surfa"e, which is accessible through the window or opening in the front wall of the case, is ready for renewed use.

The writing device according to the invention may comprise a transparent protective sheet of flexible material, such as a film of celluloid or cellulose acetate composition, superimposed upon the paper sheet or the like. The style by whi"h the impressures are made is then applied to the protective sheet instead of the paper sheet and the wear and tear to which the paper sheet is subjected is thus considerably lessened.

In this modification the Writing tabletconsists of the adhesive bottom surface and two superimposed sheets one of which is of paper and the other of transparent protecting material. The obliterating device is again arranged between the adhesive bottom surface and the paper sheet which is covered by the protecting sheet.

A writing and drawing device according to the invention in the form of a fiat case like a camera plate-holder may comprise a case with windows or openings in its two opposite walls between which tablets arranged to be written upon on both sides are placed, or which embrace two writing tablets placed back to back in the case Another feature of the invention consists in mounting the writing tablet upon a metal plate so that the layers of the writing and drawing tablet always lie smoothly upon one another since the metal plate cannot become warped. The obliterating member interposed between the paper sheet and the adhesive bottom surface may be arranged so that it can be drawn out of the flat case drawing tablet partly drawn out of its win dowed case, and

Fig. 2 is a longitudinal section of Fig. l on the line 11-11 and Fig. 2 is a partial section similar to Fig. 2 on an enlarged scale.

Fig. 3 is a cross section of Fig. 1 on' the line TIL-III,

Fig. 4.- afront View of a writing device with atab et provided with. two writing surfaces,

Fig. 5 a longitudinal section on the line V-V. and

Fig. 6 arear view of the case of Fig. 4 with the tablet partly drawn out and its top portion broken away.

Figs. 7 and 8 are a front view and a longitudinal section on the line IXIX respectively of a writing device consisting of a case with two pockets and a writing tablet in each pocket.

Figs. 9 and 10 are a front view and a longitudinal section of another modification in which the obliterating device may be moved up and down between the paper sheet and the surface beneath it.

Figs. 11, 12 and 13 are a front view. a longitudinal section on the line XII-XII. and a cross section on the line XIIIXIII respectively of another modification.

Fig. 14 is a front view and Fig. 15 a longitudinal section on the line XV-XV of a writing device with a removable obliterating member and writing tablet.

Fig. 16 is a View of the parts of the device according to Fig. 14 when taken apart.

The writing and drawing device shown in 1. 2, 2- and 3 comprises aflat cardboard of metal case a whose edges are stiffened and held together by folded metal strips 5, one edge being left open for the introduction of the writing tablet. This tablet consists of a bottom plate 0 coated with beeswax, paraflin. wax or the like and having a sheet of paper stretched over it, the paper sheet being covered in turn. by a sheet 6 of transparent celluloid, cellon or the like. The bottom plate 0 is connected to the impressible sheets d, e at the top and bottom edges 7' and g respectively by means of thin metal strips folded over the edges as indicated in the drawing. When the writing tablet 0. (Z. c is pushed into the case the top surface of the protecting sheet 6 is accessible through the opening or window h in the front wall of the case a so that marks can be produced by impressing the surfaces 6, d against the adhesive botof Fig. t

tom surface by a style or the like. Near the top open edge 2' of the case a an obliterating member, in the form of a wire or thread 70, is arranged which extends from the one lateral edge of the case to the other and is inserted as shown more clearly in Fig. 8 between the lower plate 0 and the superimposed sheet of paper a l. Instead of a thread a narrow strip of cardboard paper, metal or the like may be provided.

When marks have been made by a style or the like on the tablet in the case a these marks may be obliterated by simply drawing the writing tablet 0, d 6 out of the case as indicated in Fig. 1. member or thread 70 then travels a ong the bottom adhesive surface and separates the adhering parts of the paper d from the adhesive surface. thus causing the visible marks on the tablet to disappear. The manner in which the obliterating member is operates to separate the paper sheet from the bottom plate 2' is illustrated in. Fig. 2 in which the parts are shown larger than their natural sizes.

The interior surface Z of the back Wall of the case a, which becomes visible when the writing tablet is drawn out, may advantageously be arranged for the recording of temporary or permanent notes, or for printed impressions such as advertisements or the like.

The flat case a, in the shape of a camera plate-holder, could also be arranged to re ceive a picture post card or a picture of any kind beneath the writing tablet, c, d, e, which said card or picture could be arranged to be withdrawn from the case by itself.

The protective sheet 6, instead of being arranged to move with the tablet, could be fixed in the case so that the bottom plate 0 with the paper sheet d only is arranged to be drawn out of the case.

The modified device shown in Figs. 4-6 differs from that shown in Figs. l3 only in the case (1 having windows or openings h, h in both of its walls and in a writing tablet having a bottom plate 0 coated on both sides with layers of paraffin wax or beeswax above each of which paper sheets d and a protective sheet 6 is stretched. In a writing and drawing device of this kind two obliterating strips in are provided at the two opposite sides of the bottom plate 0. The writing and drawing plate as shown in Figs. t-6 has two impressible sides and when the tablet is drawn out of the plate 0 marks made on both sides of the plate are obliterated simultaneously.

In the modification shown in Figs. 7 and 8 the case a" is similar to the case a, of Figs. l6 except that it has two pockets with two writing tablets arranged back to back in the said pockets so that each tablet The obliterating and drawing device of this kind is also adapted for use on both sides and the marks on each side can be obliterated separately. The case a" is preferably provided with a middle partition Z whose two sides may be used for recording purposes or printed forms or the like as indicated.

It will appear from the drawings thatyif desired the marks on a part only of a writing surface may beobliterated by drawing the tablet only partly instead of entirely out of the case. The unobliterated portion of the record is then retained when the tablet is pushed back into the case.

In the modification shown in Figs. 9 and 10 the writing tablet consisting as usual of the bottom plate 0 and the superimposed sheets cl, 6 of paper and protective material. is immovably fixed in the case a which is provided with metal borders and has a window in its one side like the cases described above. In this type the obliterating strip whose ends project at both sides of the case and are guided thereat in suitably formed slots. can be shifted lengthwise in the case. When marks are to be made on thetablet the obliterating strip 10 is moved into the upper position shown in Fig. 9 and when the marks are to be obliterated the strip 70 is shifted downward to separate the paper sheet from the adhesive surface and thus cause the marks to disappear.

The writing and drawing device shown in Figs. 11, 12 and 13 differs from the aforedescribed devices in that the writing tablet consists of a metalsheet 0', a comparatively thin card-board sheet 0 placed on the metal sheet and coated with beeswax or paraffin wax or the like, a diaphanous sheet d of paper or the like above the cardboard, and finally a transparent protective sheet 6 of celluloid, cellon or any other preferred transparent resistive material. The three sheets 0 cl, e are connected with the metal sheet a by the top and bottom edges 7 and g of the latter being folded back upon themselves as shown in Fig. 12. An obliterating member 7a in the form of a strip extending from one lateral edge of the case a to the other and parallel to the upper transverse edge 2'. is arranged near said upper edge of the case. The obliterating member if is placed between theadhesive layer on the bottom pate c and the paper sheet (Z superimposed thereon. This writing device is used in the same way as the device, according to Figs. 13. The metal plate 0 may be made of tin. aluminum or any other suitable material the only important point being that the writing tablet itself is carried by ametal plate which is not liable become warped and is adapted to resist heat so that the layers c 0'. 6 will always lie smoothly upon one another so as to enable.

the tablet to beslid easily in the case.

l nder certain conditions the card-board sheetc couldbe dispensed with and the adhesive coating spread directly upon the metal plate 0 j p The modification shown in Figs. 1-t, 15 and 16 differs from that of Figsll, 12 and 13, in that the metal obliterating strip 73 is arranged to be drawn out of the casing (1 \Vhen the strip 70" is in position in the case as shown; in Fig. l4 the two ends of the strip lie in notches min the metal border d of thecase a so ends of the strip do not project laterally beyond the edges of the case a. The one end of the strip 7.2 is bent so as to form a loop-shaped handle n and this end at, least is arranged to engage frictionally or clampingly in a notch m of the metal border 7) so that when the strip k" is in position in. the case a as shown in Fig. 14, it cannot slip out automatically. To enable the obliterating strip k to be readily introduced between the adhesive layer 0 and the paper sheet d when it is inserted in the case. the bottom plate of the writing tablet. is provided with anotch 0, while the superimposed paper sheet (Z and the protecting sheet 6 have no such notches. Hence the front end of the obliterating strip is" will always enter automatically into its proper positionbeneath the paper sheet (i. As shown in Fig. 16 the writing tablet consisting of the parts 0 0 d, 6 can be completely drawn out of the case a after the obliterating strip k has been removed. A damaged tablet or injured layers thereof can thus be readily replaced. After anew or repaired tablethas been inserted in the case a the obliterating strip 70 is. also reinserted and the writing device is then ready for, renewed use.

I claim:- l

1. The combination with-a writing and drawing pad comprising a basecoated on one face with a plastic substance and a tissue sheet superposed on said coating, the base with its coating and the tissue sheet differing in color. said sheet beingadapted receptacle. said pad beingreciprocable,in said receptacle transversely to said strip.

2. The combination with a writing and drawing pad comprising a base coated on one face witha plastic substance and a that the tissue sheet superposed on said coating, the base with its coating and the tissue sheet differing in color, said sheet being adapted upon impressure to adhere to said plastic substance'falong the lines of impressure, of a case for said pad, said case c'omprising a windowed four-edged wall and a second four-edged wall joined to the first at three edges thereof, the Writing and drawin surface of said pad being visible throu h the windowed wall of said case,and a strip interposed'between said base and said sheet substantially parallel to the open edge of said case and attached to opposite sides of the latter as and for the purpose described.

3. The combintion with a writing and drawing pad comprising a metal base coated on one face with a plastic substance and a tissue sheet superposed on said coating, the base with its coating and the tissue sheet differing in color, said sheet bein adapted upon impressure to adhere to said plastic substance along the lines of impressure, of a receptacle for said pad, the writing and drawing surfaces of said pad being visible when the latter is in said receptacle, and a strip interposed between said base and said sheet and attached to opposite edges of said receptacle, said pad being reciprocable in said receptacle transversely to said strip.

4. The combination'with a writing and drawing pad comprising a metal base coated on one face with a plastic substance and a tissue sheet superposed on said coating, said tissue sheet being held in position by back-turned opposite edges of said base plate, the base with its coating and the tissue sheet differing in color, said sheet being adapted upon impressure to adhere to said plastic substance alon the lines of impressure, of a receptacle for said pad, the writing and drawing surfaces of said pad being visible when the latter is in said receptacle, and a'strip interposed between said base and said sheet and attached to opposite edges of said receptacle, said pad being reciprocable in said receptacle transverselv to said strip.

5. The combination with a writing and drawing pad comprising a metal base coated on one face with a plastic substance and a tissue sheet superposed on said coating, the base with its coating and the tissue sheet differing in color said sheet being adapted upon impressure to adhere to said plastic substance along the lines of impressure, of a case for said pad, said case comprising a windowed four-edged wall and a second four-edged wall joined to the first at three edges thereof, the writing and drawing surface of said pad being visible through the windowed wall of said case, and a strip interposed between said base and said sheet substantially parallel to the open edge of said case and attached to opposite sides of the latter as and for the purpose described.

6. A device of the kind described comprising a case consisting of a windowed four-edged wall and another four-edged wall joined to the first at three edges and unfastened at the fourth edge so as to leave an opening thereat; a writing tablet extractable from the said case through the said opening; said writing tablet consisting of a base plate, a plastic coating on the plate and a diaphanous sheet adapted upon impressure of the said sheet against the said coating to adhere along the lines of impressure; and an obliterating member located between the plastic coating and the diaphanous sheet, said obliterating member being fixed at two opposite joined edges of the case and extending parallel and adjacent to the unfastened edge.

7. A device of the kind described comprising a case consisting of a windowed four-edged wall and another four-edged wall joined to the first at three edges except at two opposite notched portions of two of the said three edges, the fourth edges of the wall being unfastened to each other so as to leave an opening at the fourth edges; a writing tablet extractable from the said case through the said opening; said writing tablet consisting of a base plate with a notched edge, a plastic coating on the plate and a diaphanous sheet adapted upon impressure of the said sheet against the said coating to adhere along the lines of impressure; and an obliterating member adapted to be inserted in the said notches and between the plastic coating and the diaphanous sheet.

8. A device of the kind described comprising a case consisting of a windowed four-edged wall and another four-edged wall joined to the first at three edges except at two opposite notched portions of two of the said three edges, the fourth edges of the wall being unfastened to each other so as to leave an opening at the fourth edges; a writing tablet extractable from the said case through the said opening; said'writing tablet consisting of a base plate with a notched edge, a plastic coating on the plate and a diaphanous sheet adapted upon impressure of the said sheet against the said coating to adhere along the lines of impressure; and an obliterating member adapted to be inserted in the said notches and between the plastic coating and the diaphanous sheet, the obliterating member being adapted to engage with the said walls at the edges of the said notches.

9. The combination with a writing and drawing pad comprising a base plate coated on both faces with a plastic substance and a tissue sheet superposed on said coating on each side of said plate, the plate with its coating and the tissue sheets differing in color and being adapted upon impressure to adhere to said plastic substance along the lines of impressure, of a receptacle for said pad, the writing and drawing surfaces of said pad being visible when the latter is in said receptacle, and a strip interposed between said base and each of said sheets and attached to opposite edges of said recep-

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