US889918A - Copying-cloth for type-writer platens. - Google Patents

Description

110,889,918. 7 PATENTED JUNE 9, .1908.

' A. J. FARMER.

COPYING CLOTH FOR TYPE WRITER PLATBNS APPLICATION FILED 313,113, 1907.

. t I 1 I 1 l 1 I 1 I 1 1 l I I v i 1 11 i I v 1 1 I 1 1 I 1 I 1 1 i I 1 1 I I I 1 1 1 1 1 1 I I 1 1 1 1 i 1 1" v1 11 Z zheJJ-ew I I Eye/2&0]? WM di /aw Detroit, county of Wayne, State particularly to an improvement in type- UNITED STAllES PATENT UFFICE,

ARTHUR J. manna-or DETROIT, MIoiiIoAN.

GOPYING-CLDTH FOR TYPE-WRITER ,PLATENS.

art to which it pertains re make and use the;

same, reference bem had to the accom any ing drawings, which form a part 0 this specification. p I

My, invention relates in general to "mani folding copies of written matter,- and more,

writers for producing duplicate copies with {out the use of'carbon pa er.

v It is'customary whe'nut'isdesiredto pro ribbon. against the same, w

duoeiduplicate copies of typewritten "matter to in'te'rpose'a sheet of carbon paper between twof'sheets of blank paper, the three sheets, being then inserted between the platen and.

copying ribbon. Theoriginal co y is made' on the foutersheet by the t e ibrcing the liile the second copy 'ismade by the carbon paper 11 on the. inner sheet owing to the impact oft transmitted through the outer sheet. This method-is objectionable as it requires considerable time to arrange by hand the su er posed blank sheets and interposed car on paper and to then insert the series of'sh'eets 1n the type-writing machine. The handlingof the carbon aper soils the hands of the; o erator and aiso fre uently soils the inner 'slibet of blank pa er w en the series of sheets are placed aroun the platen.

It has heretofore been proposed to obviate the use of carbon paper in making duplicate typewritten copies byv securing "aroundjthef platen a covering impregnated with bopyin etween the ribbon an paper, the inner one that the characters eing transparent so imposed on theback thereof'ir'om the platen may be read through the paper; This method is, however, objectionable as'the step by step rotation of-the'platen'brings the same portions of the covering. into writing alinernen't with the type during the successive revolutions of the platen, thereby soon wearing outsuch portions of the coveringwhile the intermediate portions which I are not brought into writing alinem'ent of the type remain un-used. It has also beenp posed Specification of Le tters Patent.

Application filed February 18,15107. Serial .Io. 358,082.

e type responding to the width ofthe usual tylpe Patented June 9, 1908.

her etofor to dispense with the use of carbon paper in making duplicate copies of typewritten matter by providing an endless copyin belt surroundin the p aten and a guide ro er. This metho necessitates special fixtures being secured to the machine and also requires a copying belt of a length corresponding to the length of the sheets of paper used.

The primary object of my invention is to provide'means for producing (in licate copies of typewritten matter without t e use of carbon paper or other copying material interposei betweentheisheets of blank paper, and

which willjavoid the objections to the methods above referred to.-

' A further object of'rny' invention is to provide a typewriter platen-with a copying cover' secured loose y arouiid the surface .diilie' ijent portions of; t e. covering will be brought into. writing' alinementwith the ty e during "the.successive.i eviolutions of t e platen, thereby fully utilizin every portion of the covering.

provide 'acopyi n'gcoverin' "for typewriter platens whiqhvmay. be readily msertedm a ty ewriting', maciineiianci fsjcu'red loosely .ar uridgth' platen'ilh A still further object ,oginyinvelitionis to gdig plicatecopies of typewritten matterwhichwll be simple in pensive in; manufacture;-

ereof" provide meansl'for" rodii construction, ine and efli-clent. in use.

;.' A still further,.o.bject rmy invention, is to thereof which will result in such movement ,oftheooizering relatively. to the platen: that My invention maybe generally described as 'consistih in roviding a flexible covering r'i'ciiriipregnated with color .s'tifi flexible backing secomposedo afa .ing matter and a cured thereto, the width of the covering core writer platen and litssize being such t when secured around the platen it will hang loose therefrom and move relatively thereto during the step by step revolutions of the platen. g

My invention will be more fully described hereinafter withreferenc'e to the acco1npanying drawing in which the same is illustrated as embodied in a convenient. and practical condition to be inserted in a typewriter'preparatory to securing the same around the platen thereof.

The same reference characters are used to designate the same parts in the several figures of the drawing.

-Reference character A indicates the usual core of an ordinary typewriter'platen the ends of which are provided withjournals a, a.

B indicates the hard rubber layer surrounding, the core such as is provided-in the The partio ar con usual form of platen.

. struction of platen, however, in itself forms no part of m ment iscapab e of being used in connection invention, as. my improvewith any type of platenythe form shown-bemg merely or convenience in disclosing my invention; i

. carbonized cloth. In order tliat the cover-' ,ing may be suficiently stiff to be readily in- 0 indicates a flexible covering for the typ'et writer platen comprising a fabric lmpreg hated with pigment or other coloring matter.-

capable of producingan impression when a blow is received thereon, such for instance as serted in a typewriter pre aratory to scouring the samearound the p aten, I preferably provide a backing (Z of stiff flexible material,

such for'instance as paper, to-which the carbonized cloth is smoothly secured. In order that the covering C may be easily inserted in the typewriter it is desirable that the edge thereof which passes'around the platen should be folded back as indicated at c in Fig. 3, thereby preventing the covering from wrinkling'when being inserted between the-platen and the usual contacting guiding surface.

Secured to the printing surface of the covering so as to project beyond the fold formed by turning back the portion 0 are fastening devices such as adhesive tabs (1 and 0 The edgeof' the covering op osite the foldedportion is preferably cut a on planes intersecting the plane of the axis of dicated at C and The covering 0 is of a I length greater than the circumference of the platen so that when. secured, around the platen it will be sufficiently loose thereon to permit its moving relatively t'oQthe surface-of the laten.

-T e coverin r b inserting the folded edge 0 between the p aten' and the adjacent guiding surface and then rotating the platen so that the inclined edges C and C 'may over-lapthe folded'portion 0. The tabs 0 and c are then secured to.

the portionsof the covering adjacent the sides of the inclinededges (l and C as clearly shown in Fig. 1. The folded portion 0 which is straightened out after the covering I is located around -the' platen underlies the portion of the covering immediately adjacent the inclined edges Cand' 0 'After the covering has been secured the platen as inis secured around the platenaround the platen the typewriter machine is used in the ordinary. manner two sheets of paper being inter osed between the covering on theplaten an the usual typewritin bon. The 0 eration of the keys. reduces impressions rom the ribbon upon t e outer surface of the outer sheet of paper while corresponding-impressions are formed by the type upon the undersurface of the inner thin sheet of paper by forcing the same into contactjwith t ering loosely surrounds the platen the-step e platen covering. As the covbystep rotation of the platen permits. a movement of the covering relatively to the surface of the platen so that different portions of the covering are brought into'writing alinement'duri of the platen, ereby utilizing the entire surface of. the covering. By prov'idin inclined edges on the over-lap ing end 0 the rib- - the successive revolutionst coveringthere is no danger o more than two letters in a line of typewriting bein obscured by. reason ofthe over-lapping e ge of the covering beingengaged by the type.

From the foregoing description it will be observed that I have invented an improvement in the art of duplicat-in typewritten copies by means of which two sheets of paper may be inserted between the usualcopymg ribbon and a copying covering around a platen thereby obviating the necessity of in-. serting carbon paper between the sheets of' writing paper, the co yingi covering being loosely seured a roun the platen-so that it will move relatively to the surface of the platen and thereby bringall ortions thereof into writing alinement with t e type.

Having now fully described my invention,

Letters Patent is:

1. The combination with a revoluble what I claim as new and desire to secure-by p platen of a typewriting machine, of a cop j mg covering loosely surrounding and whol y and driven from said platen, said band being composed ofa layer of fabric impregnated with coloring matter and a stiff flexible bacl ing secured to the fabric. I

In testimony whereof, I sign this s'peciih cation in the presence of two witnesses.

ARTHUR J. FARMER.

Witnesses: I

LEONARD E. HORTON W. J. Gnnrson.

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