US1465616A - Duplicator - Google Patents

Description

Aug. 21, 1923.

G. R, SCULTHORP DUPLICATOR Filed Sept. l2 1921 Patented Aug. 2l 1923.

encuen Beernem soprrrronr,'or.enncn, ENGnANn.

Application fuertemente 12, ,1921- ,Serial Np. 500,291(

.Z 'Q all fw from t may concern. i

Be itknown tliatGno'igor RnGiNALD Scun- 'r.uon r, subject of theling yofGi-eai', Britain and Ireland, readings@ alhalrf Landen,

England, has invented new oi' improved .of livlib" .the following is .e

number'. Mypresent `imprloyenien ts aim atsmplfyngthe constructie@ Q f: the 'auparatus, che'aPenieg-ts l1@widuetf?.11, and @making it perhaps easier to manipulate. fltlis cer-- tamly no less .etcient vthan `irrenons apparatus or the kind and .Some-@Smets maybe eren more SO- lt is, unitair.er.,v Yelyompact and handy requiring only a small space lfor .storage `or :transport Y VThe accompanyingdrarving Villustrates lthe invention, Eig. 2 1 being aperjspective .View and Fig. 2 a`.central yertcllse'ctionv- Referring to .the saidgdrayying A grepre- `sentsa shallow rectangular tray, madeof zinc or alloy Vor other suitable material,

felt, or insteadofrfelt, A alargeflat p ad made more or less after the fashion of an ink pad could be vprovided such asl'is commonly used for rubber stamp pads. This absorbent pad B covers practically the Whole bottom of the tra A.

llpon this absorbent pad B a foraminous metalplate C is superposed, which for convenience may be made of the same material as the tray, and the perforations p are closely distributed through its' thickness, leaving a plain margin around its outer edges. AV

sheet of linen D or equivalent porous fabric or material is applied upon the perforatedV plate C being fastened thereto in some suitable fashion, For example, four (or any other convenient number of) studs H are fixed in upright position close to the top end of the plate C and the porous sheet'D will then be provided With holes-or eyelets 7L for passing over such studs H and thereby7 pre ventingdisplacement of such sheet D.

Before using the apparatus, the pad B must be Well inked with an inky brush or other Yc eption or expression of `thev ink or v,edge for passing over the studs H., ysomewhat larger-than lthe size Vof tliefgstenr cil to `be used, land'in this is 'laidfa sheet orpad of'ab'sorbelltimaterial B, such as thielr means Aby which the inlry fluid (or paint,- vis Wellspread over tlxe'pad (o .of -it as is'rcqui'red rforthe particular stencilled area), untilthe pad is' thoroughly f soaked with from front tobaclr, constituting a kind of 'ink'Y reservoir.' may have cells or Aperforatiolils in it, fo'rthe' purpose of, assisting in 4the distributiomre- Huid: The perforated plate Cy and'v absorbent Asheet Dhavingthen been' laid onfthefp afdBv .y

thus prepared, pressure is applied. byan ordinaryhand roller or otherwise, which causes thefluid to be forced upthrouglifthe perforations p in the yplate C and to'soalk into 4the sheet independently beforehand orY the absorbent sheetD" It is advisable tofink at leastto moisten it, so astorender itY moresusceptible to complete saturation `by the ink. lfv this is done effectuallypit may i ,not always'be necessary toapplyfprelimi nary vpressure tothe said `sheet `and' "plate before applying the waxed stencil E, ,(pre- -paredby a typewriter or stylolin the kusual `manner) inasmuchas pressure is Vcase ,traiisrnittedjV1 yj the operation ofy printing i freni theapparatus vas followsg Tliefstencil l E Vcontains arrow of holes s V,near the top The Vpaper to ,beprinted upon islaid face i lt; c anfbe Vdoiiej by'r themand V in some rases. A roller, however, is preferable'. The" i`m pression is produced on the paper owingY to the printing fluid being forced through the stencil E from theporous absorbent sheet D,'and the latter is continually replen ished by the pad B from which the fluid is squeezed V'and can only escape vthrough the holes p in the plate C into the said absorbent sheet D.

When' itis desired'to fasten .the bottom downwardson thelpreparedstencil E and Arollen? passed over the back ofthe .paper ,Whilst inthis position7 oranyotlier'sortof Y pressure L:distribaed ferenlymay bei ar'iildend of the'sheet D also, this may be done by forming a pocket in this end of the sheet by doubling the bott-0in of `the sheet, asiat'`v (Z, and closing the two ends lof such pocket" by stitching. e In fixing thesheet D in 'posi-. tion, thepocket Z `(which will then be onj the under sideV of the sheet) is first pulled on i to the bottoniVV end of the plate C, and the length of the sheet D is such that it liasft'o be stretched Vtightly in orderY for its holes' 7iat the opposite end to be passed over theY tom edge to accommodate the closed ends of i the pocket l as will easily be understood.

A small linger knob I*` is conveniently proi vided upon the top face of the perforated plate C close against one edge so that the Vplate may be easily lifted. rlhe body of the stencil'E will adhere'to the sheet D by reason of the viscosity of the ink or such like substance and it is neither necessary nor advisable to fasten'the stencil by its bottom end also. It is held at its top end by the same studs II which hold the porous sheet D as already stated. The free end'of the stencil sheet E allowsV of unavoidable slight extension when rolled, this freedom preventing itfrom ruclring up. An' adjustable slide A injury to may be provided upon the sides of the tray A for indicating the proper position of the paper to be printed upon.

A suitable position indicator is shown in the drawing in the formy of aY thin metal strip J extending from side to side of the tray A. `T he ends rof this strip d each bear a spring clamp or saddle K adapted to grip upon the upstanding edges ofthe tray A; lat any distance .from the ends. The bar J throughout the greater portion of its length and for about half of its Width is preferably bent up at a right angle, forming a stop J1 for the top of the paper, Whilst the remainder of the bar forms a flat plate J2.' The object of the flat portion J2 is, first, to pre- Y sent a small non-sticky surface of metal for 'the corner of the paper' to rest upon, thus greatly' facilitating the lifting off of the paper Ysheet with the finger and avoiding the stencil Which is unavoidable when repeatedly picking 0E sheets ofv paper by their corners when they lie direct on the stencil. A further object of the fiat portion J2 is to contain a naine number trade mark or advertisement of the apparatus or its manufacturers. Y

The apparatus can be packed neatly and compactly in a case or box, in .which may also be housed the ink, brush, and any other appurtenances.

Having thus described my said invention,

2. In combination in a duplicator, a tray, Y

a reservoir pad therein, aperforated plate on said'pad, an absorbent pad on said perforated plate, and Van indicator carried bysaid tray and cooperating Withfsaid, absorbent 'pad and `comprising an adjustable strip having one portiony turned to forma guide for the top of the paper and the other left the stencil. v f

3. In combination in a duplicator, a tray, a compressible reservoir pad therein adapted flat to facilitate lifting of the `Vpaper from to be charged with a suitable printing fluid,

a perforated plate on saidpad and freely movable within said tray to compress said pad between said plate and said trayand thereby force printing fluidithrough said plate, andan absorbent pad onA the side of"V Y rsaid plate opposite said reservoir pad and adapted to receive printing fluid from said reservoir pad through said plate.

GEORGE REGINALD SCULTHORP.`

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