US828556A

US828556A - Stenciling-machine.

Info

Publication number: US828556A
Application number: US29507406A
Authority: US
Inventors: Edward F Kunath
Original assignee: Underwood Typewriter Co
Current assignee: Underwood Typewriter Co
Priority date: 1906-01-08
Filing date: 1906-01-08
Publication date: 1906-08-14
Anticipated expiration: 1923-08-14

Description

N0- 828,556. PATBNTED AUG. 14, 1906.

E. F. KUNATH. STENGILING MACHINE;

APPLICATION FILED JAN. 8, 1906.

Fig.1;

94 U I nveutor-GM M j- \ls Attorney 2 SHEETS-SHEET 1.

No- 828,556. PATENTED AUG. '14, 1906.

E. P. KUNATH. STENGILING MACHINE.

APPLIQATION FILED 'J'AN. 8, 1906.

2 SHEETSBHEET 2.

Fig. 2.

rm TED STATES PATENT OFFICE.

EDWARD F. KUNATH, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO UNDERVVOOD TYPEWRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

STENCILlNG-MACHINE.

Specification of Letters Patent.

Application filed January 8,1906. Serial No- 295,074.

Patented Aug. 14, 1906.

To all whom, it may concern.-

Be it known that I, EDWARD F. KUNATH, a citizen of the United States, residing in J ersey City, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Stenciling-Machines, of which the following is a specification.

This invention relates to stenciling-machines, particularly those in which the stencil is secured upon a hollow revolving cylinder, the ink belng usually applied to the inside of the cylinder and passing through pores therein and being absorbed by a blanket thereon, the stencil being placed u on the ink-blanket. In machines of this 0 aracter it has been found impracticable to secure accurate registry of the type-written or printed matter upon the stenciled sheet. Frequently the sheets to be stenciled are printed Withheadings, ruled lines, blanks, &c., intended to be filled in by stenciling but owing to the defects in the stenciling-machine it is found that matter stenciled upon the blanks falls sometimes-above and sometimes below the pro er position. It is also found in some cases t at difference in the speed at which the machine is operated produces a difference in the registry of the stenciled matter on the sheet.

One object of my invention is to avoid this difficulty and secure exact re ister of the stenciled matter upon the duplicate sheets. In this class of machines it is usual to provide a roll beneath the stencil-cylinder to ress the paper up a ainst the same, and I have found that 1f t e leading edge of the paper is slightly crimped or bent it does not, when introduced, pass so far into the bite of the cylinder as when the leading edge is straight or smooth. This is one of the principal reasons for discrepancy in a register of the stenciled matter upon the sheets. I have contrived means to overcome this difficulty, so that all sheets, whether their leading edges are crimped or not, are fed the same distance into the bite of the roll and cylinder, and hence accurate register is secured at all speeds of operation.

Another object of my invention is to secure any desired degree of pressure of said roll against the cylinder and at the same time make it convenient to release or throw off the roll withoutdisturbing the pressure 0 lin adjusting means, so that when the roll is again thrown up against the cylinder it will bear thereagainst with the same pressure as before it was released.

Other objects will hereinafter appear.

In the accompanying drawings,'Figure 1 is a perspective view of a rotary-cylinder stenci ing machine, showing my im rovements applied thereto, although it wil be understood that the invention may be applied to other forms of stenciling-machines. Fig. 2 is a front elevation of the machine. Fig. 3 is a detail of the device for regulating the pressure of the paperressing roll. Fig. 4 is a sectional transverse e evation of the machine.

Upon a base 1 are erected end frames 2 3,

in which is journaled a hollow stencilingcylinder 4, which is made of erforated sheet metal to permit outward ow of the ink to a blanket 5, which is wrapped around the cylinder. A stencil-sheet is also shown held thereon by a clamping-bar 7. A handle or crank 8 is provided for rotating the cylinder. A tooth 9 is formed upon the end of a spring-arm 10, which rotates with the handle, the tooth 9 springing into a notch 11, formed in the framework 3, thus determining the normal rotative position of the stencilcylinder. Pressin up against the bottom of the cylinder is a r0 1 1-2, the axis of the latter being preferably parallel and in the same vertical plane with the axis of the cylinder 4. After the blanket and stenciled sheet have been secured upon the cylinder 4 and the ink spread upon the inside of the latter and the machine is ready to start the sheets are laid upon a table 13 against a side gage 14, which is of considerable length and is adjustable transversely, as indicated in dotted lines at Fig. 2, said gage being mounted upon an L- shaped arm 15, which is secured by thumbscrews 16. Thus perfect side register of the sheets is secured.

The sheets are advanced one by one into the bite of the roll 12 and cylinder 4. Leading from the shelf 13 almost to the line of contact between said roll and cylinder is a feed-plate 17, over which is mounted an inclined late 18, which is preferably curved, both cp ates extending longitudinally of the er and prefera ly for the. full length t ereof. Said lates converge, so as to form a throat into which the sheets are introduced one by one. The inner edge of the plate 18 is almost in contact with the top surface of the are secured at their ends to intervening blocks 19 by means of screws 20. It will be seen that smooth sheets of pa er will pass through without difficulty an that if the leading edge of the sheet is crumpled or crimped or bent it will become gradually smooth by passin through the convergin plates 17 18 and adso. that the inner thinne edges 17 a and 18 of said plates are so close to the line of contact between the roll 12 and the stencil-cylinder 4 that the leading edge of the sheetis maintained in a perfectly flat condition until it strikes the roll and c linder. The latter having a fixed normal position, as already explained, it results that the sheets always advance the same distance before being arrested by coming to the bottom of the crevice or interstices between the roll and cylinder, or, in other words, the cylinder and roll coo erate to form a gage for the leading edges 0 the sheets of paper, so that the stenciled matter falls in a predetermined position upon the sheet, and perfect registry of the stenciled matter u on the blank sheet is insured. Thus the

guides

17 and 18 feed the blank aper into the point where the roll and cylin er come into contact, It is un necessary to stop and straighten out the leading edge of the paper, as it can. be forced right in between said guides without giving it other attention, providing only that it lies against the side gage 14. It is only necessary to force a sheet in as far as it will go, the bite of the cylinder and roll being the stop or gage for the sheet. The machine can be fed aster and made to accomplish considerably more work than heretofore, largely because the paper is presented so readily, uickly, and accurately to the bite of the roll and cylinder. The registry of the stenciled matter u on the blank sheets is always the same at ail s eeds of operation. Since the plates exten for substantially the entire length of the cylinder, or at least of the printin -field thereof or of the bite of roll and cy inder, both wide and narrow sheets may be straightened and fed to the gage.

The pressure-roll 12 is journaled in a air of sprin -arms 21, which are hinged at t eir rear en s at 22 and joined at their forward ends by a cross-b ar 23. Midway of its length the latter has a projection 24, which is engaged by a cam 25, fixed upon a rock-shaft '26, so that by turning the shaft the projection or finger 24 is lifted, together with the pressure-roll frame, so that the roll is pressed up against the cylinder. When it is desired to release the roll, as for the purpose of removing or inserting new stencil-sheets or wax sheets, it is only necessar to turn the rockshaft 26 back. For roc 'ng said shaft an Upon the shaft is formed a set of teeth 31,

like the teeth of a worm-wheel and engaged by the threads of the screw 30. By turning said screw upon its own axis the shaft 26 can be rotated, while the arm 27 remains stationary, so that exactly the required pressure may be brought upon the trunnions of the roll 12, such pressure being even throughout the length of the roll, owin to the construction of its 5 ring-frame an to the pressure brought to ear by the cam 25 upon the middle portion of said frame. When it is desired to cast the roll off, the latch 28 is sprun out of the way and the arm 27 flies up an the roll 12 drops, but the rotative adjustment of the screw 30 is not changed, so that in order to cause the roll to bear again with exactly the same pressure as before it is only necessary to press down the handle 27 until it is caught by the latch 28.

Variations may be resorted to within the scope of my invention, and portions of my im rovements may be used without others.

flaving thus described my invention, I claim 1. In a stenciling-machine, the combination of a stencil-cylinder which is stopped before each impression, to ermit the introduction into the machine 0' a fresh sheet, a roll to press sheets against the cylinder and to co- 0 erate with said cylinder to form a gage for t 1e leading edges of the sheets, means for determining the initial rotative position of the cylinder, and means extending close to the line of contact between the cylinder androll, for smoothing out the leading edges of the sheets, includlng a plate extending along the cylinder and having one ed e close to said line of contact, and a secon plate between the first and the cylinder and also extending along the latter, said plates relatively inclined so as to form a throat extending. substantially the entire length of the roll.

2. In a stencilin -machine, the combination of a stencil-cy inder, which is stopped before each impression, to permit the introduction into the machine of a fresh sheet, a roll to press sheets against the cylinder and to cooperate with said cylinder to form a gage for the leading edges of the sheets, means for determining mechanically the initial rotative position of the cylinder, and means extending close to the line of contact between the cylinder and roll, for smoothing out the leading edges of the sheets, including a plate extending along the cylinder and havingone ed e close to said line of contact, and a second p ate between the first and the cylinder and also extendin along the latter,

said plates being relative y inclined so as to' form a throat for uiding sheets into the bite of the cylinder an roll the'inner edge of the second plate being almost contiguous to the surface of the first plate.

3. In a stenciling-machine, the combination of a stencil-cylinder which is stopped before each impression, to permit the introduction into the machine of a fresh sheet, a roll beneath the same to press sheets against the cylinder and to cooperate with the same to form a gage for the leadin edges of the sheets, means for mechanically etermining the initial rotative position of the cylinder, a plate beneath the cylinder and having one edge portion close to the line of contact between the roll and cylinder, and a second plate curvin around the cylinder and converging to the st plate, the inner edge of the curved plate being almost in contact with the top surface of the first plate and extending beneath the cylinder nearly to the edge of the first plate, and both plates extending along substantially the entire printing-field of the cylinder.

4. In a stenciling-machine, the combination of a stencil-cylinder which is stopped before each impression, to permit the introduction into the machine of a fresh sheet, a roll beneath the same to press the sheets against the cylinder and to cooperate with the same to form a gage for the leading edges of the sheets, means for mechanically determining the initial rotative position of the cylinder, a plate beneath the cylinder and having one edge portion close to the line of contact between the roll and cylinderfand a second plate curving around the cylinder and converging to the first plate, the inner edge of the curved plate being almost in contact with the top surface of the first'plate and extending beneath the cylinder nearly to the edge of the first plate, and a pa er-shelf; said first plate extending from sai paper-shelf nearly to the line of contact between the roll and cylinder, and both plates extending alon the cylinder for substantially the entire lengtl i of said line of contact.

5. In a stenciling-machine, the combination with a stencil-cylinder, which is stopped before each impression, to permit the introduction into the machine of a fresh sheet, of

means for pressing sheets against the cylin-' ressure-roll is mounted, a releasable device or putting said springarrns under tension, and a member carried by said releasable device but' adjustable independently thereof, for varyin the tension of said spring-arms that is produced by said releasable device.

7. In a' stenciling-machine, the combination with a stencil-cylinder, a pressure-roll and a manually-operable throw-0E device for putting said roll'under and releasing it from pressure, of means between said roll and said manually-operable device an'dadjustable independently of the latter, for effecting fine variations in the pressure of the roll.

8. In a stenciling-machine, the combination with a stencil-cylinder and a pressureroll, of means whereon said roll is supported so that one end may yield independently of the other, a releasable device or throw-off for causing said roll to press against theplaten, and means adjustable independently of said releasable device, for effecting fine variations in the pressure of the roll against the'cylinder.

9. In a stencilin -machine, the combination with a stenci cylinder and a roll, of means for pressing the roll against the cylinder, a cam for putting said pressing means under tension, a handle for operatin said cam, a screw device betweensaid hand e and cam for varying their relation, and releasable means for detaining said'handle in position to press the roll a must the cylinder.

10. In a stenci ing-machine, the combination with a stencil-cylinder and a roll, of yielding means for holding the roll against the cylinder, a device for putting said yielding means under tension, said tensioning device including a shaft, a handle upon said shaft, a screw rotatable in said handle, a worm upon said shaft engaged by said screw, and releas-v able means for holding said handle in rollpressing position.

11. In a stenciling-machine, the combination with a stencil-cylinder and a roll, of a pair of springarms for pressing the roll against the cylinder, a cam for putting said spring-arms under tension, a handle for operatin said cam, a screw device between said han 1e and cam for varying. their relation, and releasable means for detaining said handle in spring-tensioning position.

12. In a stenciling-machine, the combination with a stencil-cylinder and a roll, of a air of spring-arms, yieldin devices for holdmg the rollagainst the cy inder, a cam for putting said ielding devices under tension, a shaft upon which said cam is mounted, a handle u on said shaft, a screw rotatable in said han e, a worm u on said shaft engaged by said screw, and relbas'able means for holding said handle in spring-tensionin osition.

\ I EDWARD F. UNATH. Witnesses:

B. C. STICKNEY, J. BADDETT.

IZlO