US1556499A

US1556499A - Recording device

Info

Publication number: US1556499A
Application number: US718985A
Authority: US
Inventors: Deutsch Hermann
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-06-09
Filing date: 1924-06-09
Publication date: 1925-10-06
Anticipated expiration: 1942-10-06
Also published as: FR583926A

Description

Oct. 6 1925 H. DEUTSCH RECORDING DEVI GE Filed June 9. 1924 2 Sheets-Sheet 1 H DEUTSCH RECORDING DEVICE 'Filed June s. 1924 Patented oct. 6, 1925.

HERMANN DEUTSCH, 0F BERLIN-LIGHTERFELDE, GERMANY.

RECORDING DEVICE.

Application mea :une 9, 1924. serial no. 718,985.

To all whom t may comm.'

Be it known that I, HERMANN DEUTSCH, a citizen of Germany, residing. at 11 Marienplatz, Berlin-Lichterfelde, Germany, have invented certain new and useful Improvements in Recording Devices. ofwhich4 the following is a specification.

This invention relates to recording devices and particularly to devices of this kind in the form of 'a tablet. -t f The object of the invention is to produce a recording device of exceedingly simple construction and egreat simplicity in use. The recording device in accordance with the present invention comprises a diaphanous sheet with an adhesive back arranged above a. sheet of material such as paper which is so thin and flexible that when a pointed instrument is passed over theftransparent sheet above it and -a slightpressure is applied the flexible sheet, whose color dilers from that of the top. sheet, is raised,

by the top. sheet at the points or lines where -pressure has been applied. .In other words the lower diferently colored sheet adheres to the top adhesive backed sheet at the places where the top sheet has been pressed against it and becomes visible at these parts "or the likey whose properties arelsuch that v the writing sheet of Flg. 7 on an enlarged through the top diaphanous sheet. Thus, `if apointed instrument is passed over the top sheet the line described by the said instru.-

ment will appear through the diaphanous' sheet. The'marks or vrecords thus produced disappear when the parts of the bottom sheet that adhere to their adhesive backed top transparent sheet are separated from the latter byl any suitable means.

The top or writing sheet consists of diaphanous elastic material' s uch as Celluloid, cellon (acetyl cellulose), hardenedvr gelatine Vthe substance of the adhesive layer with which its :back surface is covered does not penetrate to the top surface of the diaphanous sheet.y The adhesive layer ,may consist of a thin coating vof vdiaphanous substance such as paraiiin, wax or the like.

The bottom sheet whose color differs from that of the to sheet-is preferably placed `upon a raised ase as for example a metal base plate. y

` By constructing the recording device in this manner it is possible to provide that when records are made by writing Qrdrawing on theltop surface of the writing sheet permanent copies are produced on ordinary paper. To this end a sheet of copying paper such as carbon paper is placed beneath the said iexible colored or dark sheet and beneath the copying paper the sheet is placed upon which the permanent record or copy -placed between the two said sheets.

Fig. 2 is va section on the line Il-II-tof Fig. 1.

Fig. 3 is a fragmentary section through the writing plate on an enlarged scale.

Fig. 4 is a rear view of a fragment of the back surface of the writing sheeton an enlarged scale, r VFig. 5 is a section of Fig. 4- on. vtheline Fig. 6v is a section on the line VI-VI of Fig'. 1 on'an enlarged scale. This -itgure shows how the lower colored or dark sheet is raised at the parts where the pointed instrument is raised by the top diaphanous elastic sheet at the` parts where pressure is applied to the latter by a suitable instrument Asuch as a pointed stick.

Fig. 7 is a front view of a-modied writing tabletaccording to the invention,

Fig. 8 is a section on the line VIII-VIII of Fig. 7,

Fig. 9 is a front view of a fragment of scale, v

Fig. 10 is a view on an enlarged scale of a part of the section according to Fig. 8.

' Fig.. l1 is a view of the top portlonv of the writing tablet 'with the writing plate partly drawn out and the transverse -separating-member indicated in two positions so as to illustrate the manner in which 4a new writing plate is inserted lin the case of the tablet and Fig.f12is atop view ofV Fig. 11.

The tablet comprises a thin casing a whichvv or metal and stretched parallel'to the top v is preferably strengthened by a sheet metal border b and whose one wall or side has a large opening or'window c. The writing plate consists of a ground plate Z of sheet metal, a thin blackv or colored paper sheet e which forms the first effective part of the perpetual writing tablet, and the writing surface or sheet proper f superimposed upon the colored paper sheet e. The writing sheet f may consist of cellon or Celluloid with a smooth surface. The rear surface of the writing sheet f is coated with a plastic or adhesive layer g which may consist of transparent paraffin, wax or the like. To enable the paraffin layer to cling more readily to the rear surface of the cellon or celluloid sheet f, this surface It is roughene'di as illustrated in Fig. 4 before the adhesive layer g is spread over the same. The tablet is in condition for use when the plate is inserted in the case a. Marks are produced on the tablet by passing the point of a style or the like over the surfzgze f exposed behind the window c.

When the point of a pointed instrument is passed over the top diaphanous elastic writing sheet f while applying pressure the lines of the sheet f along which the point is drawn are pressed against the different colored paper sheet e and go back to their normal position or rise again when the pres sure ceases and in so doing raise the differ-A ent colored paper sheet e with them as in-` dicated in Fig. 6. The paper sheet then becomes visible at the lines where it adheres to the adhesive back of the writing sheet F. To obliterate the record thus produced it is only necessary to separate the adhering parts of the sheet'c from the adhesive back of the sheet f by any suitable means when the recording device consists merely of the tablet d, f, g, this may be performed by merely raising the sheet f with its adhesive back g from the dierent colored `paper sheet e. But in the device illustrated the separation of the plastic-backed sheet 7', g from the paper sheet eis effected by means of a transverse strip i made of card-board edge of the case between the side edges of the casefa soas to lie above the paper sheet e. Hence, when the writing plate is drawn out of the case a as indicated in Fig. 1 the position of thel separating strip is shifted relatively to the paper sheet e so. that the parts of the plastic-backed sheet f, g that have been caused to adhere to the paper sheet e, are separated from the latter and the writing, drawing or'other marks are p thus obliterated.

In the modification shown in Figs. 7-12 the writing plate is arranged in a thin case a 'provided with an obhterating member or separating strip z" and it is-also provided with a-ground plate df Vof lsheet metales in the device shown in Fig 2. Arranged on l the metal ground plate d however is a thin block or v`/writing pad Z which comprises a number of writing sheets perforated along the line m. Arranged above the writing pad Z lis a sheet of dark or colored copying paper or carbon paper efwhich forms the l first effective part of the perpetual writing tablet. Superimposed upon the carbon paper e 1s a plastic-backed writing sheet,

the upper surface f consist-ing of celluloid or cellon and the plastic back g consisting of transparent paraffin, waX or vthe like. The plastic-backed sheet forms the second effective part of the perpetual writing tablet.

The pad Z, carbon paper e and the plastic backed sheet f', g may be held together at the top edge of the writing plate by a clip n. lVhen the writing surface f in this type of tablet is written on, there is produced, in addition to the immediately erasible record, a permanent copy on the topmost sheet of the writing pad Z. When the writing plate is then drawn out of the case a for the purpose of erasing the writing or drawing produced on the plastic-backed sheet, the latter f', g and the sheet of car,

tirely removed from the case a whenever a new pad Z, and if necessary, a new sheet of carbon paper e, is to be inserted, the obliterating member or transverse strip z" is arranged to be removed laterally from the ease in the directionA of the arrow o. When the member has been thus removed the writing plate can be entirely removed. from th Acase. The obliterating strip z" has a hafiidle g) at its right end, this handle being shaped so as to form a part of the sheet' metal border Z) when the strip is in its operative position.

lVhen a new writing plate is to be introduced into the case the greater part of the obliterating strip i is inserted between the plastic-backed sheet f', g and thefcarbon paper c as shown in Fig. '11, Then the writing plate is placed into its final pos1- tion in the case (L and then the. oblitci'ating strip is shifted into the final position indicated in Fig. 6 in which the front .end l; passes through a slot v'in the sheet 'met-al border b at the left edge of the case. The handle p of the obliterating strip z" then embracesl the two walls of the case ai as shown. in Fig. 7 and the writing tablet -is then ready for reneweduse.

In the claims the words resistive is in tended to mean: not liable to be worn 'or len injured by the style o1' instrument used in writing or producing other records on the rial with a rear layer of adhesive substance,

and a second sheet differing in color from the Writing sheet and placed beneath the latter, said second sheet bein`g thin and flexible so that when the point of a pointed instrument, that imparts no color to the writing sheet, is passed over the latter the parts of the second sheet, against which the elastic writing sheet is pressed by said instrument, vadhere to the writing sheet and are raised by .the same when the pressure of said instrument ceases.

2. Recording device comprising a base, a sheet of thin flexible material on said base, and a diaphanousv resistive writing sheet of. elastic material with anadhesive rear surface for cleaving to and raising parts of the I thin flexible sheet against which it has been pressed.

3. Recording` device comprising abase, a sheet of thin flexible material on said base, a diaphanous resistive writing sheet of' elastic material with an adhesive rear surface for cleaving to and raisingk artsof the thi-n flexible sheet against whic it has been pressed, and a member for separating the cleaving parts of saidy rear surface from said thin flexible sheet. j

4. Recording device comprisinga base, a sheet of thin flexible material on said base, a diaphanous resistive writing sheet of elastic material with' an adhesive rear surface for cleaving to and raising arts of the thin flexible sheet against wliich it has been pressed, a member for separating the cleav ing arts of said rear surface from said thin flexi le sheet, the thin flexible sheet consistin'g of copying paper and av block of detachable leaves beneath the copying paper.

5. Recording device comprising a base, :i flexible sheet on 'the base and a second diaphanous resistiveelastic sheet above the flexible sheet with an adhesive layer on its back surfacethe diaphanous sheet with its rear adhesive layer eing adapted to be raised from the flexible sheet and the color of the flexible sheet differing from that ofthe diaphanous sheet. y

6. Recording device comprising a base, a flexible sheet on the base and a second diaphonous resistive sheet above the flexible sheet with an adhesive diaphanous layer on its back surface, thel diaphanous sheet with its adhesive layerbeing adapted to be raised from the flexible sheet and thc color of the flexible sheet differing from that of the diaphanous sheet.

7. Recording device comprising a base, a flexible sheet on the base, and a second diaphanous celluloid sheet above the flexible sheet with an adhesive diaphanous layer on its back surface, the diaphanous sheet with its adhesive layer being adapted to be raised vfrom the flexible sheet and the color of the flexible sheetdifering from that of the diaphanous sheet.

8. Recording device comprising a. base, a flexible sheet on the base and a second diaphanous sheet above the flexible sheet with an adhesive diaphanous layer on its back surface, said back surface being roughened so as to result in a better cleavage of the adhesive layer, the diaphanous sheet with its adhesive layer being adapted to be raised from the flexible sheet and the'. c olor of the flexible sheet differing from that of the di aphanous sheet.

9. Recording device comprising a non-im- .pressible base, a flexible sheet on the base and a second diaphanous sheet above the flexible'sheet with an adhesive layer on its back-surface, the diaphanous sheet with its adhesive layer being adapted to be raised from the flexible sheet and the color of the lflexible sheet differing froml that of the di- I aphanons sheet.

10. Recording device comprising a base, a flexible sheet on the base and a second ,diaphanous sheet above the flexible sheet with an adhesive diaphanous layer on its oul back surface, the diaphanous sheet with its adhesive layer being adapted to be raised from the flexible sheet, and the back` of the flexible sheet, being coated with material that -is transferable to another sheet and capable of producing` a mark thereon.

11. Recording device comprising a base, a flexible sheet on the base and a second diaphanous sheet above the flexible sheet with an adhesive diaphanous layer on its back surface, the diaphanous sheet with its adhesive layer being adapted to be raised from the flexible sheet, and the flexible sheet consisting of ,carbon copying paper.

12. Recording device comprising a base., a block of detachable writing sheets on said base, a sheet of copying Y paper on sardi block. and a diaphanousl sheet above the copying paper provided with a substratum "of diaphanous adhesive 'materiaL the diaphanous sheet with its substratum being