US884704A - Duplicating apparatus. - Google Patents

Description

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No. 884,704.. I PATENTED APR. 14, 1908. E. J. BRASSEUR. DUPLIGATING APPARATUS.

APPLICATION FILED JULY 25. 1907.

2 SHEETS-SHEET 2.

INVENTOR WITNESSES i' ATTORNEY E -l which are to be reproduced cut therein.

Uurr'n sTrns PATENT OFFICE ERNEST J. BRASSEUR, OF CHICAGO, ILLINOIS, ASSIGNOR TO A.. B. DICK COMPAY, CHICGO, ILLINOIS, A CORPORATION OF ILLINOIS.

D'PLICA'IING APPARATUS.

Specification of Letters Patent.

Patented April 14, 190s.

.application filed July 25, 1907. Genial No. 385,433.

'paratu's comprising a printing couple, the

members of which are movable relatively to effect the printingof the impression and one of which members is movable toward and away from the other to operative and inoperative' positions.

The invention has reference more particularly to duplicating apparatus printing by means of a stencil having the characters In such machines, there are employed a drum having the stencil secured thereon and covering a portion of the periphery, and a pressure-roller adjacent to the drum and 1novable toward and away from the same ,to operative and inoperative positions as the drum is rotated. The impressioneheet is fedover' a suitablefeed-board or guides, so that, when the pressure-roller is raised to operative 'position, its forward edge will be grasped between the drum and roller and the sheet fed forward and simultaneo .i imprinted upon.

vIn stencil-duplicating machines employing such a drum and pressure-roller, it is unda sirahle to ,have4 the pressure-roller raised to operative position 'einen no impression-sheet is fed forward to coperat-e therewith, for if nov sheet were fed forward and t'heimpressionroller were raised, the latter would malte contact with the stencil on the drum and take up ink therefrom, and when next ah impressionsheet were fed 'thrcug r the fune, this inlr would be transferred to the b :of the sheet. In accordance with ir inventionyii provide mechanism preventing such movements of the pressure-roller into coperative relation to the drum when no sheet is fed forward thereto. This mechanism coacts with the impression-sheet itself, and its operation is controlled thereby in such manner that if no sheet is present in a position for printing the pressure-roller will not be raised to its opera- .extensions e (Fig. 1).

vthe shaft f2 and the other to one of the s broken away in part; Fig. 2 is a top view, the

stencil-carrying drum 'being removed; and Fig. 3 is a detail view corresponding to Fig. 1v but showing a diferentvposltion of 'the operating arts.

Re erring to these drawings, the machine consists of a base A on which are mounted side-frames B, B', and a stencil-carrying drum C mounted for rotation in suitable bearinffs formed in the frames B, B. The drum is ofthe usual construction, having a sheet of foraminated material over a portion of its periphery and means for securing the ends of a stencil-sheet to the drum se thatit overlies this foraminated sheet. The shaft c of the drum carries a gear-wheel c meshing with a gear c2 carried by a stub-shaft mounted for rotation in a bearing formed in the frame-plate B, which shaft also carries an operating handle c3. Directly underlying the drum C is the pressure-roller D carried by arms E, E', which are loosely mounted at one end upon a shaft e journaled in suitable bearings in the side-frames. At their free ends, the arms E, E are provided with curved A shaft e2 is mounted in bearings in the side-frames and has cams e3 secured thereon in position to coact with the extensions e, so that when theshaft e2 is turned by means of 'an suitable handle the cams e3 will coactv with thejext'ensions e to turn the arms E, E upon the shaft e and thus lock the pressure-roller D in its inoperative positicn. d'.

Mounted upon and extending between the side-frames B, B', is a feed-board F havinga plurality of openings f therein. Suitable standards f mounted at the sides of the feedboard F have bearings formed therein to receive the ends of the shaft f2 which carries a fingers being adapted to enter one of the 4opei'iings f in the feed-board F. Securedto provided with an elongated slot g3 through which'the shaft c of thedrum C extends(v Lever G carries a roller gtivhich bears on the periphery of a cam g5 securedto the shaft c.- A coil-spring g6 (Fig. 2) has onendiixed toards f and tends to turn shaft f3 so as to carry the ends'of the fingers f3 into openings f and to hold the-roller g4 against the periphplurality of fingersff, the end of each of theseI ery of the cam The cam ghas a single raised portion g7 thereon, and the half of the` cam op aosite this raised portion is a true semicirc e. ,Secured on the shaft c of the drum C adjacent to. the cam g5, is a second cam 72, the peri hery of which is adapted to coact with a ro ler /i carried by'a lever H.

Cam h has a single raised portion, which lies directly opposite the raisedportion g7 on the cam g5. This lever is also provided with a slot h2, through which the shaft c extends. Intermediate its ends, .the lever H rests upon the'pin g carried by `the arm' g, and at the end opposite that carrying the roller it lever -'H is provided with a tooth h3. Loosely mounted on one of the tie-rods h4 connecting the side-frames of thev machine, adjacent to one end thereof, is a lever K carrying at its upper end a milled pin 7c adapted to coact` with the tooth h3 on the lever H. At its lower end, lever K carries a pin Zr which ea'.-

. direction ofthe arrow in 1, and also, b'y

means of mechanism not herein shown as it vfprms no part of my present invention, movin the arms E, to carry the pressurero er D to operative and inoperative positions. Once m each revolution of the drum C, the raised portion g of the cam g5 actuates the leverAG to'rock the shattf2 and thus raise ,the ends of the iingersj"3 out of the openings f and then lower them yagain into those openings. As shaft f2 is thus rocked, pin g raises 'the free end` of lever H and then lowers the same again. if an impression-sheet be fed over the feed-board F while the ends of the fingers f3 are raised above the surface of the feed-board to carry the edge of the' impression-sheet into )osition to be grasped lbetween the drum and roller D when the latter is raised, then when the roller g4 passes be- A yond the raised portion a7 the ends of the iingersj'3 will not movedownward to the position in which they 'are' shown in Fig. 1, since they will be arrested by the impressionsheet in theposition in which they are shown in -Fig. .3, thev impression-sheet being here indicated -by the lette. When the arts are in thiswpositithe pin-g holds the ever H insuch position that the tooth h3 is above the upper edge of the milled pin k. As the rotation of the drum C, continues, the cam h coacts with the roller 71, to move the lever H to the rightin Figs. 1 and 3, and on account of the elevated position in which the free end of lever H is held, the tooth h3 will move past the pin 7c without'engaging the latter'. During the further rotation of the drum, the impression-sheet will be grasped between it and the roller D and fed forward and-imprinted upon in the usual manner. if no impression-sheet be fed over the board F, the ends of the ngers f3 will not be arrested in their downward movement, but will be carried to the positionin which they are shown in Fig, 1, thus allowing the free end of lever H to move downward to the position' in which it is shown in that figure. In that case, asthe cam h moves the lever H to the right in Fig. 1, the tooth will engage the pin c and rock the lever K on its pivoth, the pin 7c on lever Kwill engave the end of lever J, and the shaft e; towhidh the lever J is fixed, will be rocked in itsbearings. The pins j, 7" carried by the lever J and arm J will,

during this rocking movement of the shaft e, turn. the arms E, E about the shaft e, so as to carry the pressure-roller D downwardly to inoperative position, and the roller will be held in this position until the lever H moves i to the left again, after the roller h has passed over the raised portion on the cam h. It will thus be seen that when an impression-sheet is-properly fed into the machine ,the operation of imprinting upon the sheet is performed in the usual manner, but ifno sheet y'be fed, the pressure-roller D` is held in the depressed or .inoperative position while the stencil ispassing over the roller, so that the roller will not take-up ink from the sheet, which, in the further operation of the machine, wou`ld be transferred to the backs of impression-sheets subsequently fed into the machine. 4, v

Having now described my invention, what I claim as new therein and desire to secure by Letters Patent is as follows 1. In a. duplicating machine,y the combination of a drum, meansfor securing a stencilsheetthereon, Vmeans for rotating the drum, a

pressure-roller, movable arms in which said roller is rotatably mounted, said arms being movable in correspondence with the rotation of the drum to carry the pressure-roller to operative and inoperative positions relatively to the drum a feed-board over which impression-sheetsgare fed between the drum and roller, and means controlled by an impression-sheet on said feed-board for operating` said arms to position'the pressure-roller, substantially as set forth.

2. In a duplicating machine, the combination of a drum, means for securing a stencilsheet thereon, means for rotating the drum, a pressure-roller underlying the drum, pivoted arms in which said roller is rotatably mounted, said arms being movable about their pivots to carry the roller toward and away Jfrom4 the drum, a feed-board over which impression-sheets are fed between. the

drum and roller, and means controlled by 13o 'tion\the forth. l

4. In a duplicating machine, the combination of a drum, means for securing a stencilssamm mounted, said arms being movable about. their pivots to carry the roller toward and awayf'rom the drum, a feed-board over which impression-sheets are fed between the drum and roller, an arm movable to coact with an impression-sheet and ada ted to have its movement arrested there y, and means controlled by the' arresting of. the movement of said arm by the impressionsheetfor operating said pivoted armsL to posipressure-roller, substantially as set sheet thereon, means for rotating the drum,

a pressure roller,l arms in which said roller `is rotatably mounted, said arms being movable tocarrysthe roller to operative and inoperative positionsrelatively to the drum, means for guiding an impression-sheetl between vthe drum and roller, an arm movable to coact with an impression-sheet when in position for coactionwith. the drum and roller; andadaptedto have its movement arrested theehygand means controlled by the coaction ofsja rm wit-haan impressionsheet for positiening,thepressuiie-roller relatively'to the drumfsubstantayiasset forth.

- 5; In a duplicating machine, the combination of a'drum, meansfor securing a stencil- .v sheet thereon, means for rotating the drum,

l isrotatably mounted, said arms being mova-.pressure-roller, arms in which said roller 'able to carry the roller to operative 'and inoperative ositions relatively to the drum, a feed-boar over which impression-'sheets are fed between said drum and roller, said board having an opening therein, an arm mounted adjacent tothe feed-board and adapted'to be moved asthe drum is rotated to carry its end into saidopeningorlinto coaction with an 50 impression-sheet, and means operated when said arm entersfsaid Vopening for holding the pressure-rollerin inoperative position, substantially as setforth;l

G. In a duplicating machine, Athe combination of a drum, means for securing a stencilsheet thereon, means for rotating the drum, a pressure-roller underlying the drum, pivoted arms in which the roller is rotatably mounted,a feed-board over which impression-sheets are fed between the drum and roller, connections between the drum and said arms for operating the latten as the drum is rotated to move the pressure-roller toward and away from the drum, and-means controlled by an impression-sheet on said feed-board` for making and breaking said connections, substantially 4as set forth.

7 In a duplicating machine. the combination of a drum, a,v stencil-sheet secured thereon, umeans for rotating the drum, a

pressure-roller, arms in which the roller is. v

rotatably mounted movable to carry the roller to operative and inoperative positions vrelatively to the drum, means for guiding impression sheets between the drum and roller,v connections between the drum and said arms for .operating the latter as the drum is rotated to move the roller relatively to the drum, and means controlled by an impression-'sheet in position for coaction with the drum and roller for making and breaking said connection, substantiallyv as set forth.

S. In aduplicating machine,A the combina,- tion of a drum, a stencil -sheet secured thereon, means for rotating the drum, a pressure-roller, arms in which the roller is rotatably mounted movable to carry the roller to operative and inoperative positions relatively to the drum, a feed-board `over which impression sheets are fed between the said drum and roller, said board having an opening therein, a controlling arm mounted adjacent to the feed-board and adapted to be moved as the drum is rotated to carry its end inte said opening or into coaction with an impression-sheet, connections between the-drum and the arms carrying the pressureroller for operating the latter as the drum is rotated to move the roller relatively to the drum, and means operated when said controlling Varm enters said opening for making and breaking said connections, substantially as set` forth.

This lspecification signed and witnessed'

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