US1501575A

US1501575A - Carbon paper

Info

Publication number: US1501575A
Application number: US444307A
Authority: US
Inventors: Waldheim John
Original assignee: Underwood Typewriter Co
Current assignee: Underwood Typewriter Co
Priority date: 1920-01-27
Filing date: 1921-02-12
Publication date: 1924-07-15
Anticipated expiration: 1941-07-15

Description

J ly-.15 1924.

1,501,535 J. WALDHEIM CARBON PAPER Original Filed Jan. 37. 1920 Patent July 15, 1924.

o STATES.

PATENT OFFICE.

JOHN WALDHEIM, or ELIZABETH, NEW JERSEY, nssIGNoR 'ro uNnERwoon mn- WRITER COMPANY, on NEW YoRK,-N. Y., A CORPORATION or DELAWARE.

CARBON PAPER.

Original application filed January 27, 1920, Serial No. 354,475. Divided and this application file February 12, 1921.

To all whom it may concern:

Be itknown that I, JOHN WALDHEIM, a citizen of the United States, residing in Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Carbon'Paper, of which the following is a specification.

This invention relates to carbon-sheets or duplicating material to be used between work-sheets in manifolding upon a typewriting machine. The invention may be used in connection with combined typewriting and computing machines which perform addition and subtraction.

It is customary intypewriting machines to use a bichrome ribbon having black and red color-stri es, and, when a computing de vice is used, t e ribbon mechanism is usually connected to the computing mechanism in such a way that any numbers that are subtracted are typed in red upon the worksheet; thus the work-sheet bears its own evidence that such numbers have been subtracted by the computing mechanism.

This expedient, however, has been necessarily limited to the single sheet upon which the ribbon directly prints; and the difliculty has existed that on the carbon copies, which are almost invariably manifolded at the same time as the ribbon copy, there is nothing toindicate whether any particular number has been written in black or in red; that is to say, in computing, there is nothing to indicate whether ithas been added or sub tracted by the computing mechanism.

Many efforts have been made to avoid this difliculty. It has been proposed to have large figure types in typewriting-computing machines, which are called into use only when subtraction is being performed by the computing mechanism, so that the carbon copies will show by the large figures thereon that certain numbers were subtracted.

It has also been proposed to print a special sign before each number that is to be subtracted, so that the carbon copies shall glve evidence accordingly.

It has also been proposed that a special mark shall beprinted under each digit that is typed, where such digits are subtracted.

The object of my invention 1s to provide for a distinction to be made upon the carbon copies of the main or origmal worksheet, without necessitating the use of a Serial No. 444,307.

special set of types, or a special sign or other special device or mechanism in the typewriting machine.

To attain this end and other ends, I provide means whereby the characters typed in certain columns upon the work-sheet are typed in a distinctive color on the carbon bon-sheet, the remaining portion being the normal color of the carbon.

For the purpose of keeping the carbonoverlying strip in accurate alignment and register with the desired column u on the work-sheet, the carbon-sheet may be astened thereto in such a way that the sheet and strip play the part 'of an integral sheet. The carbon-sheet may be of the usual width in some cases, that is to say, the width of the work-sheet, with the result that, if, the carbon-sheet is properly inserted in the usual manner, the strip will fall upon the proper column.- To enable the strip to be adjusted to the proper column laterally of the sheet, the carbon-sheet may be provided folding strip, may be a strip adapted to prevent the carbon imprint from appearing on the manifold copy.

This is a division of my application, Serial No. 354,475, filed January 27,1920.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a diagrammatic perspective view of an Underwood typewriting machine platen, showing a carbon-sheet embodying the present invention in use.

Figure 2 is a face view of the sheet seen in Figure 1.

Figure 3 is a face View of a similar sheet, but adapted to be used to modify the manifolded work upon certain writing lines instead of in vertical columns.

Figure 4 is a view of a fragment of a carbon-sheet, showing how the detachable strip may be mounted thereon.

When it is desired to make a carbon copy upon a work-sheet 10 of the matter to be typed upon an original sheet 11, there is interposed between the two, before insertion into the machine, a carbon-sheet 12, so

that the

sheets

10, 11 and 12 are fed together around the platen 13, being held thereto by the usual feed-rolls 14. This enables type-bars 15, striking through a ribbon 16, to print not only upon the outer sheet 11, but also upon the inner sheet 10, the characters carried by the type-bars 15. Normally, the types print through a black stripe 17 of the ribbon 16, but, under some circumstances, that is to say, in some columns, the red stripe 18 of the ribbon 16 causes red characters to be printed u on the outer work-sheet 11. To enable the characters printed by the red stripe 18 to be shown in red, the carbon-sheet 12 is adapted to hold a strip of red manifolding paper 20 at the column where the red printing is effected.

To enable the strip 20 to be held in place overlying the proper column of the sheet 12, its opposite ends are herein shown as threaded through slits or openings 21 in extensions 22 lying outside of the rep-roducing'surface 23, which forms the main body of the sheet 12. To hold the strip 20 accurately in place, it may fit the slits 21 rather closely. When thus held, its reproducing surface lies next to the work-sheet 10, thus "causing the characters typed upon that worksheet to appear inred, i. e., in the color of the strip. Any typed mark of the reproducing surface 23 in this column is received upon. the back of the strip 20, and therefore fails to appear upon the worksheet 10.

In order to prevent the strip 20 from slip ping out of the slits 21, the end of the strip may be bent over or folded back as at 24, thus enabling the strip 20 and sheet 12 to be handled as a unitary structure. If it is desired that characters typed upon one column of the work-sheet 11 shall not appear upon the carbon copy 10, a blank strip 25 may be threaded through other openings 21 and have its end turned back as at24, so that it will not interfere with the ready handling of the carbon-sheet 12 any more than does the strip 20.

Where it is desired to provide a carbonsheet 12 which shall be used for many kinds of work, there may be provided, in addition to the outer slits or openings 21, inner slits 26 offset or staggered relatively to them. In some cases it may be found more convenient to omit one or both of the extensions 22, and have the

slits

21 or 26, or both, suitably placed elsewhere on the carbon-sheet.

It will be noted that the sheet 12, shown in Figure 2, has the

strips

20 and 25 at the left, while, as shown in Figure 1, the strips are at the right. This is because Figure 1 is a back view of the carbon-sheet, while Figure 2 is a front view.

Where it is desired to omit from a worksheet 10 characters appearing upon certain writing lines of the original work-sheet 11, a carbon-sheet 27, like that shown in Figure 2, may be used, having, if desired, a side extension 28 at each side in which the slits or openings 21 are provided, so that blank strips 25 and contrasting color strips 20 may be held in position, as upon the carbon-sheet 12.

In Figure 3 is also shown a wide strip 29, which is held in position by extensions 30 narrower than the strip but adapted to fitclosely in the slits or

openings

21 and 26, thus enabling a carbon-sheet 12 or27, having slits for one width of strip, to be used with other wider strips, since extensions 30 can easily be made to fit any desired or standard size of

slits

21 or 26.

To mount the

strips

20 or 25 on the carbon-sheet indicated by 12 in Figure 4:, the carbon-sheet may be provided with projections 26 to pass through perforations 26 in stri 20 The projections 26 may be folded over to retain the strip 20 on the carbon-sheet 12 Variations may be resorted to within the scope of the invention, and portions of the improvements may be used withoi't others.

Having thus described my invention, 1, claim:

1. A manifolding sheet comprising a carbon-sheet having a perforation, and a narrower overlying sheet connected to the carbon-sheet by a part passing through the perforation and holding said narrower sheet in position over the carbon-sheet to prevent the underlying portion of the carbon face of the carbon-sheet from contacting with a work-sheet.

2. A carbon-sheet having means, including a plurality of perforations, for holding the opposite ends of a narrower overlying sheet, to hold the latter in place, and to prevent the underlying surface of the carbonsheet from contacting with a work-sheet.

3. The combination with a carbon-sheet hishaving a slit, of a narrow strip having a difi'erent surface and overlying said sheet so as to prevent a portion thereof from contacting with a work-sheet, said strip having an end passed, through said slit to hold it.

4. The combination with a carbon-sheet having a plurality of perforated slits at each end, of a strip having a manifolding surface of a different color, and insertible in said slits to be held in position thereby and overlie a section of the surface of the carbon-sheet, to become a substitute for the manifolding surface.

5. The combination with a carbon-sheet having extensions provided with slits, of a strip lnsertible in various pairs of said slits to overlie different selected sections of the carbon surface of the sheet, to prevent portions of the surface of the carbon-sheet from contacting with a worksheet, said strip having a manifolding surface of a different co or 6. The combination with a carbon-sheet having an end extension provided with slits, of a strip insertible in one of said slits to overlie a strip of the carbon surface of the sheet, to prevent the surface of the carbonsheet from contacting with a work-sheet.

7 The combination with a carbon-sheet having an end extension provided with offset slits, of a strip insertible in any of a plurality of said slits to overlie any one of a plurality of strips of the carbon surface of the sheet, to prevent a selected strip from contacting with a work-sheet. a,

8. The combination with a carbon-sheet having a black reproducing surface, of an extenslon of the sheet having staggered openings therein, and a strip having a red reproducing surface insertible in any of said openings to overlie selected portions of the black sheet surface.

9. The combination with a carbon-sheet having a black reproducing surface," of an extension at each end of the sheet, each extension comprising staggered openings so that they are paired ofl with each other, and

a strip insertible selectively in said extension to overlie a stripe of the reproducing surface to keep it from contact with a worksheet.

10. A manifolding sheet comprising a carbon-sheet and a detachable sheet connected to the carbon side of the carbon-sheet, said detachable sheet overlying a portion only of the carbon-face of the carbon-sheet so ,as to leave another portion of the carbon-face having reduced extensions to fit into the u perforations.

13. A manifolding sheet having a carbonface, in combination with a superposed strip formed to present a manifolding surface having a color different from that of, the carbon-face of the manifoldin sheet, said superposed strip being adjusta le relatively vto the manifolding sheet.

I 14. A manifolding sheet comprising a main carbon-faced sheet and an overlying sheet mounted on the'carbon-face of the main sheet and being of less width than the carbon-sheet to expose a portion of its carbon-face, and connections between the end portions of the overlying sheet and the ends of the main sheet for causing the overlying sheet to move as a unit with the main sheet when it is laid with its carbon-face against a work-sheet.

15. A manifolding sheet comprising a main carbon-faced sheet and a sheet detachably connected to the carbon side of the main sheet, said detachable sheet being of less width than the main sheet and having one of its side edges spaced inwardlyl from the corresponding edge of the main s as to leave a portion of the carbon-face of the main sheet exposed, and said detachable eet sosheet being movable as a unit with the main sheet when it is laid with its carbon-face against a work-sheet.

16. A 'manifolding sheet comprising a main carbon-faced sheet and a sheet on the carbon-face of the main sheet and being of less width than the main sheet to e a portion of its carbon-face, and connections between the overlying sheet and the main sheet for causing the overlying sheet to move as a unit with the main sheet.

JOHN WALDHEIM.

Witnesses:

CATHERINE A. NEWELL, EDITH B. LIBBEYQ