US830969A - Duplicating apparatus. - Google Patents

Description

No- 830,969. PATENTBD SEPT. 11, 1906. MOION J. D. CARTER.

DUPLIGATING APPARATUS.

APPLICATION nun MAY 25. 1905.

WITNESSES: 7 E T 1 I www m My; xm BY ATTORNEY p with this I employ a bar secured to the duview of a portion of a duplicator-drum, showsheet of waxed porous paper alone be emtration in the arranging of the sheet, all as hereinafter set forth in detail.

ED TA ES PATEL orrr o.

McION JAMES DOUGLAS GABTERQOF LONDON. ENGLAND, ASSIGNOR TO A- B. DLCIC COMPANY, OF CHICAGO, ILLINOIS, A CORPORATIQN OF ILLINOIS.

. DU PLICATI N G No. 830,969. Specification of Application filed May 25,1905. Seria11i'o.262,2 85.

APPARATUS.

Letters Patent. Patented Sept. 11, 1906,

To all wit/mt if ma-Z! concern:

Be it known that I, MoIoN JAMES DOUG- LAS CARTER, a subject of the King of Great Britain, andia resident of London, England, have invented a certain new and useful Impr'ovement in Duplicating Apparatus, of which the following is a specification.

The invention relates generally "to that type of duplicating apparatus in which is employed a waxed stencil-sheet through the interstices in which ink is passed forthe purpose of imprinting upon a subjacent impression-sheet.

i The object of the invention is to provide for readily and easily attaching the ste'ncil sheet to the duplicating-machine. To this end I provide the forward end thereof, or of a part to which the waxed sheet is secured, with a pocket formed by means of a rearward fold, preferably with closed ends, and coacting plicator-drum and having a part adapted to be received within such fold. In connection with such means of attachment I prefer also to employ means for securing accurate regis- In the drawings, Figure 1 is a perspective ing the attachment bar secured thereto. Fig. 2 is a similar view of the stencilsheet, and Fig. 3 is a sectional view of said sheet on the line 3 3, Fig. 2.

The term stencil-sheet is used herein broadly and without reference to whether a ployed or such a sheet associated with another stronger sheet, such as a backing-sheet or a type-protecting tissue-sheet, or both.

For the purpose of the present disclosure I have shown a backing-sheet A of some strength, to which is secured along the line b a waxed stencil-sheet B. The latter may, if desired, be covered with a thin type-protecting sheet (not shown) of the character known in the art. In the forward edge of the stenoil-sheet (in the present instance of the backing A) I form a fold a by turning such edge backward. Also, if desired, the side edges adjacent to such forward edge may be turned over laterally u on the fold, as shown at a a, to formsuch f0 d into a pocket.

duplicator-drum. This may have the angular strengthening-flange c, if desired. In order to secure theadvancing edge of the stencil-sheet in position, the same may be laid over the bar C and drawn rearwardly, whereupon said bar will enter the fpld or pocket at such edge and firmly hold the same in position. The rearward end of said sheet may be secured in any suitable manner, or, if desired, the ink below such sheet may be relied upon to keep it in position on the drum.

For the purpose of securing accurate registration I may, if desired, provide the bar C with studs 0 0, adapted tocoact with slots a (1 formed in the stencil-sheet. The latter maybe of any desired shape and relatively to the edge of the sheet; but I prefer to make them of such dimensions and arrangement relatively to the fold in the forward edge of the stencil-sl1eet as that the studs 0 a will coact therewith only when said fold is in en-- gaging position relatively to the bar C. Whether this practice he observed or not the coaction of the studs and slots or other openings properly positions the stencil-sheet laterally upon the drum.

If desired, the bar C may be cut away at c and the forward (folded) end of the stencilsheet may he provided with a clip 0 holding the two parts of the fold together and preventing injury to such fold either while adjusting the stencil-sheet upon the drum or previously thereto.

I-claim as new therein, and desire to secure by Letters Patent, is as follows:

1 In duplicating apparatus, a stencil-sheet having its forward end folded downward and and openings in the sheet rearward of'said fold, substantially as described.

2. In duplicatingapparatus, a stencil-sheet having its forward end folded downward and rearward, the ends of the fold being closed, substantially as described.

3. In duplicating apparatus, the combination with a drum having a cross-bar, of a stencil-sheet having its forward end folded downward and rearward, and means closing to engage said fold, substantially as described. i

C designates a bar extending between and connected at its ends to the heads D D of the g 4. In duplicating a paratus, the combination of a stencil-sheet aving its forward edge Having now described my invention, what rearward, the ends of the fold being closed,

the ends of said fold, said bar being adapted folded downward and rearward, the extreme edge thereof being unsecured to-the body of the sheet, means closing the ends of said fold, a drum, and a cross-bar thereon having a tongue adapted to enter the pocket formed by said fold to secure the stencil-sheet to the drum, substantially as described.

5. In duplicating a paratus, the eombma ted tongue adapted to enter the pocket formed by said fold to secure the stencilsheet to the drum, substantially as described.

edge thereof being unsecured to the bodv of the sheet, said sheet having slots therein, means closing the ends of said fold, a drum, a cross-bar thereon having a tongue adapted to enter the pocket formed by said fold to secure the stencil-sheet to the drum, and studs on said cross-bar adapted to enter-the slots in said sheet. to position the sheet relatively to the drum, substantially as described.

This specification signed and witnessed this 10th day of May, 1905. t MUION JAMES DOUGLAS CARTER.

Witnesses: i

II. D. JAMESON, F. 11. RAND.

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