US1393444A - Stenciling material - Google Patents

Description

E. W. HILL.

STENCILING MATERIAL. APPLICATION FILED FEB- 27, 1 920- mwmqm Patented M. n, m.

I "ii III are quickly secured to the carrier-sheet when I IIElDlD W. HILL, CI CHICAGO, ILLINOIS, ASSIGIICR 'IO A. B, 1910 COMPANY, OF

CHICAWC, ILLINOIS, fl- CORPORATION CI IIJLINUIS:

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Specification of LettersJPatent. Patigntgdl'fimt 111 1921 application filed February .37, 1920. serial No. 3611,7141.

To all whom it mag concern:

Be it known that I, EDWARD W. HILL, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Stencilin -Mat erial, ,of which the following is. a speci cation.

My invention relates to stenciling mate'- rial, and particularly to a novel form of carrier-sheet and to the combination of such a sheet with a stencil-sheet positioned thereon, with or without an'absorbent backingsheet or fluid-receiving pad interposed between the carrier and stencil-sheets.

My invention is particularly intended for use in connection with stencil-sheets of a dry but hygroscopic character, which are generally moistened before use, such, for example, as those described in Patent No. 1,101,258, granted June 23, 1914. I have found that in such stencil sheets, when combined with other dry sheets such as an absorbent backing, a paper carrier-sheet or the like, there is a tendency to deteriorate, largely because of the passage of elements of the impregnating composition of the stencilsheet into the adjacent sheet orsheets.

My invention overcomes this objection by providing a single, permanent carrier-sheet for use with successive stencil-sheets, which the stencil is to be made, and detached therefrom when the stencil is to be put in the duplicating mbchine. The stencil-sheets will be kept in massed condition, that is, in stacks of stencil-sheets one upon the other, without any paper or other backings incontact with the same, until the stencils are to be made.

By this meansthey will lar ely be prevented massed in 'humidors,

from deterioration as by rying out. The

stencils after being written may'also be retained massed until wanted for printing, and therefore kept in a desirably soft and pliant condition. The unused stencil-sheets and the completed stencils may be kept if desired, inperfect condition for long periods.

.The carrier-sheet of, my invention 1s formed of a non-absorbent material, celluloid being preferred because sheets of the same are non-absorbent of the fluid used to soften the stencil-sheet, and because it has the necessary flexibility. It 'alsohas other I desirable qualities, including its hardness.

When a stencil is to be made, a stencil-sheet is secured on the carrier-sheet, a moistened sheet of absorbent material being interposed between the two, the stencil-sheet being then stencilized by pressure as, for instance, by means of a stylus or the type of a writing machine. 1 p

I have found that improved results of important character accrue from the use of a hard backing surface such as I propose to use. The stencils have finer lines than when a softer backing surface is used, because of which the characters are more distinct, sharper and more uniform, and the Work generally has better finish and quality. Because 0 the finer lines, also, a lighter deposit of ink is made on the reproductions from the stencil, so that less time is required to dry the sheets, there is less halo about the letters, less offset, and less lack of uniformity because of the deeper penetration of certain typewriter characters than others. Other beneficial results obtained by the use of the invention will be referred to hereinafter. i r

In the preferred embodiment of my invention the stencil-sheet is permanently secured at its upper end to a paper strip, .such as the stub of a paper carrier-sheet, which is provided with .keyhole slots. These may be slipped over a row of bent tongues which extend upwardly from the surface of the celluloid carrier-sheet. A guard or abutment strip is fastened on the carrier-sheet, or a continuation thereof as hereinafter described, above' the projections, to be contacted by the upper edge ofthe stencil-sheet, to aid in proper y positioning the latter. A flexible coverlng strip, preferably transparent, is arranged to cover the bent tongues referred to,after the stencil-sheet has been attached to the carrier-sheet thereby. A flexible strip of fabric or other suitable material is secured to the upper or leading edge of the carrier-sheet, to form a continuation thereof, to facilitate the drawing through the typewriter feed-rolls of the following portions of the carrier and stencil-sheets with the interposed absorbent backingsheet. Other details of the construction will appe t1 more fully hereinar.

n order that my invention may be more clearl understood, attention is hereby directed to the accompanying drawings for celluloid, which may be obtained in sheets of uniform thickness, and-of a sufficient flexibility to enable the same readily to be positioned in a typewriter. Preferably, if the sheet is of celluloid, its rear surface may be roughened as by sand-blasting, or provided with some friction means to prevent the slipping of the same inthe tyewriting machine. I have illustrated a pair of thin strips 2, 2, of rubber or the like, secured on the rear surface of sheet 1 for this purpose.

The celluloid carrier-sheet 1 preferably has a flexible strip 3 secured to the upper edge thereof to form an upward extension thereof. This strip 3, which I may term a leader, is adapted to facilitate the drawing through the feed-rolls of a typewriting machine of the more bulky portions of the carrier-sheet and parts carried thereby. It is preferably somewhat thinner than the car'- rier-sheet 1 proper, andis formed of any suitable material such as rubberized cloth. It may be secured to the carrier-sheet 1. by lines of stitchin 4. v The carrier-sl eet is provided adjacent its upper edge with suitable means for detachably securing the stencil-sheet thereto. Such securin means preferably take the form of a row 8f tongues 5 which are formed integral with the upper edge of the celluloidsheet 1, these tongues extending forwardly through openings in the leader 3 and being bent upwardly on the front side of the same. I

The stencil-sheet. 6 is preferably of the type disclosed in Patent No, 1101258 referred to, and may consist of a dr but hygroscopic sheet of fibrous materia impregnated with coagulated protein. My invention is notlimited to the use of a stencilsheet of this character, however, since various advantages may be obtained from the invention when other types of stencil-sheet are used. 7 Inthe embodiment of 'my invention illustrated, the stencil-sheet is'secured at its upper-Ledge to a. strip 7 of varnished paper which is provided with a horizontal series of openings ,8 through which the tongue or projections 5 on the carrier-sheet are adapted to be inserted. The stencil-sheet 6 may be secured to said strip along its upper edge by the stencil-sheet on the carrier-sheet.

adhesive material or otherwise. The openings 8 in the stub 7 are preferably slots of a keyhole shape, so that the stencil-sheet when cut may be fastened in position on the drum of a rotary duplicating machine in the usual way.

A guard or abutment strip 9 is preferably secured-in horizontal position upon the face of the leader 3 immediately above the upwardly extending tongues 5. hen the stencil-sheet is positioned on the carriersheet by slipping the tongues 5 through the slots 8, the upper edge of the stub 7 of the stencil-sheet will register with the lower edge of the strip 9 so as to properly a llipe ie abutment 9 need, of course, not be a continuous strip.

The front face of the carrier-sheet 1 is preferably provided with limitation lines 10 adjacent its top, bottom and side edge with index figures 11, or other suitable indicia. printed adjacent to the lines 10. These indicating lines and figures are for the purpose of aiding in the spacing of the stencil work done and to keep such work within the limitsof the printing capacity of the duplicating machines employed. These indicia should be visible to the operator during the act of making a stencil, either by showing through the stencil or by appearing beyond certain edges of the stencil-sheet.

A flexible covering strip 12 is secured to the front face of the leader 3 so as to normally lie over the tongue or slot securing devices for the stencil sheet, as well as the abutment strip 9. The covering strip 12 is preferably transparent and may conveniently be formed of celluloid. It is secured along its upper edge to the leader 3 as by horizontal rows of stitching 13. In its normal position it lies flat over the stub 7 of the stencil-sheet together with the tongues 5 and the abutment strip 9, so as to protect these parts while the device is being drawn through a typewriting machine. The protective strip 12 may be raised when the stencil-sheet is to be secured in position or detached. When it is in its covering position it aids in holding the stencil-sheet in position, the tongues and slots, abutment strip 9, and to some extent the protective strip12, all co-operating to prevent shifting of position of the stencil-sheet after it is attached to the carrier-sheet, the stencil-sheet thus being attached to the carrier-sheet in a fixed position relative to the limiting indicia of the carrier-sheet.

When the device is to be used the stencilsheet is attached to the carrier-sheet, and if the stencilssheet is of the character which requires moistening before using, the stencil sheet islifted or thrown back and the backing-shcet 14 placed upon the carrier-sheet 1. This backing-sheet is of absorbent maaseaaaa terial such as cloth, pa er or other fabric.

It is laid smoothly on t e carrier-sheet and stencil may be swung back into position to lie upon the vsame and to receive moisture therefrom. The carrier-sheet 1 is entirely non-absorbent, so that all ofthefluid will be effective for moistening the stenciling sheet. When the stencil has been cut, it may be unfastened from the carrier-sheet and positioned in ,a duplicating machine whenever desired.

By the use of a material such as celluloid, which is naturally non-absorbent, for the carrier-sheet, a higher degree of protection against damage of the same'by moisture is obtained than when avarnished paper car rier-sheet is used, while at the same time the cost of individual carrier-sheets as previously used is eliminated. The stubs 7 may be scored so as to cause the same to conform.

to the contour of the cylinder of the duplicating machine, thereby eliminating the present method of bending them by; hand.

As previously stated, the use of the hard backing surface provided by the carriersheet of celluloid or the like, results in a characteristically fine lined stencil. Accordingly, the deposit of ink formedon duplicates will be lighter than in theprevious practice, because of which the deposit will be more readily absorbed. The necessity which now frequently arises to speed'the impression sheets through a duplicating machine by an abnormally rapid turning of the cylinder, in order to prevent a heavy, mussy deposit of ink, will be entirely eliminated. The blotchy effects in portions of duplicating work sometimes seen, resulting from theaccidental spreading of moisture to the back surface of the carrier-sheet, will be entirely eliminated. There will be less halo about the letters where lightweight papers'are used, and less oflset.

It should also be noted that the hard carrier-sheet afi'ords sufficient resistance to the impact of the type of a. typewriting machine applied through the, stencil-sheet, to

make a good result no matter what the character of the interposed absorbent backing sheet may be. It is, therefore, possible to 'use as the backing-sheet a sheet of cloth mesh, similar to the material of which a typewriter ribbon is composed, for the purpose. of obtaining results which 'quite closely resemble the prints made by a typewriting machine through anink ribbon. The hardness of thecarrier-sheet also makes easier the work of the typewriter operator in mak-, ing the stencil, in that capital letters and specialcha-racters will not have to be struck twice, and no care will have to be taken to minimize heavy letter effects as in the case of such-type characters as 1,, r, t.

Similarly, troubles resulting from the use of a too soft platen on the typewriter are eliminated. Where stencil-sheets have become tou h through deterioration, the necessary resistance for the type impact will be available.

It will be understood that my invention is not limited to the exact details of construc-' tion described, but that the same is of a broad and comprehensive character, within the scope of the appended claims.

What I claim is z .1. In stenciling materiahthe combination of a hard flexible entirely non-absorbent carrier-sheet, a stencil-sheet of dry but hygroscopic character, and an absorbent backingsheet adapted to be inserted between said stencil and carrier sheets, said stencil and carrier sheets being adapted and arranged forready and repeated attachment to and detachment from each other.

2. In stenciling material, the'combination of a celluloid carrier-sheet 'and a stencil-' sheet, said sheets being adapted and arranged for ready and repeated detachment from and attachment to each other, with the sltlencil-sheet superposed above the carrier-, s eet;

3. In stenciling material, the combination i of a flexible non-absorbent carrier-sheet, of a hardness considerably greater than that of cardboard or paper, varnished or unvar- -nished, and a stencil-sheet of dry but hygroscalpic character, said sheets being arrange for ready attachment to, and detachment from, each other.

4. In stenciling material, the combination of a celluloid carrier-sheet, a stencil-sheet of dry but hygroscopic character, said sheets being adapted and arranged for ready. at-

tachment to and detachment -from each other,

and a separate absorbent .backing-she et, adapted to be inserted between said carrler 'and stencil sheets. i

5. In stenciling material, a celluloid carrier-sheet having means thereon for the readyand positive attachment'thereto of a stencil-shee.

6. In sten'ciling material, a flexible carrier-sheet adapted for use with successive stencil-sheets, having means thereon for the ready attachment thereto of successive stencil-sheets, and guard means adapted to pre-, vent shifting of position of a stencil-sheet on of successive stencil-sheets, and a flexible strip attached to said carrier-sheet, in position to extend over, and be moved away from, said attachment means.

9. In stenciling material, a carrier-sheet of flexible non-absorbent material having a hardness considerably greater than that of varnished cardboard or paper, adapted for use with successive stencil-sheets, and having projections bent upwardly from the upper surface thereof for cooperation with a stencil-sheet in attaching the latter thereto, and a flexible strip attached on one edge thereof to said carrier-sheet to normally cover said projections.

10. In stenciling material, a celluloid carrier-sheet, having means on the rear surface thereof to prevent slipping thereof on a surface on which the same may be placed while a stencil is being made.

11. Instenciling material, a celluloid car; rier-sheet, adapted to have a stencil-sheet secured thereon, and a-flexible strip secured to the upper edge-thereof and forming an upwardly extendin continuation thereof, and adapted tofacilltate the drawing of said carriersheet and a stencil sheet carried thereby, through the feed-rolls of' a typewritin machine.

12. n stencilin 'material, acelluloid carrier-sheet, adapte to have a stencil-sheet secured thereon, and a flexible leader strip of thinner material than said carrier-strip, secured to the upper edge and forming an upwardly-extending continuation of said carrier-strip.

13. In stenciling material, a carrier-sheet of flexible material having projections adjacent its upper edge for cooperation with a stencil-sheet in attaching the latter thereto, a flexible leader strip secured to the upper edge of said carrier-sheet to form a continuation thereof, and a flexible strip at- -tached at one edge thereof to said leader strip in jectlons.

14. In stenciling material, a carrier-sheet position to normally cover said proof flexible material having projections adj acent its upper edge for cooperation with a stencil-sheet in attaching the latter thereto, an abutment strip on said carrier-sheet adjacent said projections, against which the edgeof a stencil-sheet may abut, and a trans-- parent flexible strip attached at one edge to said carrier-sheet in position to normally extion of a carrier-sheet, flexible and non-ab sorbent and of a hardness considerably greater than that of varnished cardboard or paper, and a stencil-sheet of dry but hygroscopic character having an attachment strip at one edge thereof, said attachment strip and carrier-sheet havingcooperating attachment devices.

17. In stenciling material, the combination of a carrier-sheet, flexible and nonabsorbent and of a hardness considerably greater than that of varnished cardboard or paper, and a stencil-sheet having an attachment strip at one edge thereof, said attachment strip and carrier-sheet having keyholeopenings and upwardly extending bent projections, adapted to be inserted through said 0 enings, respectively.

18. n stenclling material, the combination of a flexible carrier-strip, a row of upwardly-extending' projections thereon, and an abutment strip thereon, and a stencilsheet-having openings through which said projections may extend and an edge adapted to, abut against said strip.

19. In stenciling material, the combination of a flexible carrier-strip, having a row of upwardly-extending projections thereon, a stencil-sheet having openings through which said projections may extend, and a flexible protective strip secured at one ed 0 to said carrier-sheet and adapted normall y to lie over said projections.

20. In stenciling material, a celluloid carrier-sheet having means thereon for the .ready'attachment thereto of a stencil sheet,

EDWARD W. HILL.

Witnesses:

JOSEPH TEAL, THOS. PINKNEY.

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