US753469A - Ho model - Google Patents

Description

,PATBNTED MAR. 1,1904.

S. BROWN. ROTARY STENCIL PRINTING APPARATUS.

APPLICATION FILED DEG. 31, 1902.

a SHEETS-31331 14 N0 MODEL.

. I -5 fin THE Noams PETERS cu. mom-11mm wnsumemu. ma

PATENTED MAR. 1, 1904.

3.. BROWN. ROTARY STENCIL PRINTING APPARATUS.

APPLICATION FILED DEC. 31, 1902.

B SHEETS-SHEET 1 N0 MODEL.

No'.75'3,-469. f PATENTBD MAR. 1, 1904. S. BROWN. ROTARY STENCIL PRINTING APPARATUS.

APPLICATION FILED UB0, 31. 1902.

3 SHEETS- SHEET 2.

N0 MODEL;

No. 75s,4e9 PATENTED MAR. 1, 1904.

I s. BROWN.

ROTARY STENGIL PRINTING APPARATUS.

AHYLIOATION FILED D150. 31, 1902.

3 SHEETS-SHEET 3.

N0 MODEL.

m. rea ise.

Patented March 1, 1904.

Unirn, TATES ATENT OFFICE.

SUMMERS'BROWN, OF LONDbN, ENGLAND.

f ROTARY STENCIL-PRINTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 753,469, dat d March 1, 1904.

7 Application filed December 31, 1902. Serial No. 137.376. (No model.)

To all whom it nearly concern: Be it known that I, SUMMERS BROWN, manufactu rer, a subject of the King ofGreat Britain residing in Fore Street avenue, in the city of London, in the county of Middlesex, England, have invented certain new and useful Improvemerits in Rotary Stencil-Printing Apparatus; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the line a Fig.1, in the direction of the arrow.

Fig. 4 isacross-section of inking-tube'trough and brush. Fig. 5 is a cross-section of plug on line C D, Fig. 1. Fig. 6 is an elevation of scale and pointer.

- I provide a pairof metalstandards 1 1 In the upper part ofthese I form; two opensided bearings 2 2" to enable the cylinder or drum 3 to be quickly lifted outand replaced. The body or face of the cylinder 3 is formed from perforated sheet metal, such as iron or other like suitable material 4, which will not be corroded or chemicallyacted upon by the ink employed. This perforated metal cylinder is secured by soldering, riveting, or in any like suitable manner to two metallic circular rings 5 5. One of these rings, 5,

is oblate or flattened at a particular point '6' upon its outer circumference, and both the rings 5 5 are flattened, as at? 7, at a point in their inner circumference. Removably fitted at either end of the rings are two metallic disks 8 8. These mayalso be perforated, if

desired; but Iprefer to make them plain, as

shown. Disk 8? is secured by means of a pin or key 9 to spindle 10, which revolves in the bearing 2, and is fitted at its outer end with a spur-wheel l1, keyed or secured to it by a set-screw 12. A stud 13 is screwed into a projection 13 upon standard 1, and on this is loosely mounted a corresponding spur- Wheel 11*, fitted with handle 14, for driving the machine, said handle being adjustably mounted on the raised boss 11" of the spurwheel 11 by means of the slot 14 and set screws 1 passing through the same and into said wheel. The disk 8 is loosely mounted upon a hollow shaft 15, into which is fitted and secured by a screw 15 a tubular plug or socket 16, upon which is mounted, preferably by screwing, a glass or'like transparent inkrescrvoir 17, provided with a cook 18, and to keep this reservoir in the vertical position I make the part of the plug fitted to the b62111? ing 2 of rectangular section, as at 19. (See Fig. 5.} The opposite end of shaft 15 is stepped into the boss 20 of disk 8. Disk 8 is stepped into a recess 21, formed in ring 5, and

is secured in position by a button 22, fastened by a set-screw 23. The shaft 15 has a series of perforations 24 in its length, some of which may be filled with bristles, hair, or the like, so as to form a distributing-brush for the ink flowing through the perforations. I prefer, however, to suspend the distributing -brush 25 from a pair of metallic arms 26, swung from sleeves 27, secured by screws to the shaft 15, said brush being attached to arms 26 by angle-brackets 28. (See Figs. 1 and 3.)

In Fig. 4 I have shown a modification in which a perforated metal trough 29 is placed immediately? below the perforated tube and through which the bristles 25 are threaded.

Above theseI find itadvantageous-to mount a perforated "metallic false bottom 30, The

perforated metal covering 4, forming the cylinder drum or carrier, terminates at the flattened portion-6 of the end. rings, (see Fig. 3,)

and the gapthus left isfilled in with a piece of metal plate, to which the perforated metal is soldered or otherwise secured, or I sometimescarry round the perforated metal and fill up the holes in it with solder over the flat- -tened part of the cylinder corresponding in position to said plate.

The pad 31, which may consist of calico or equivalent absorbent material, is wound round the outside of-the perforated cylinder. The stencil-sheet 32 is then placed upon it and secured, together with the pad, in the proper position by means of metal laths 33;Wl1i0l1 are put into slots formed, as shown, on ring being pivoted at the other side on pins 33, secured to end ring Beneath the cylinder formed and mounted up as described is re movably hung in open-sided bearings 2 2 resilient pressure-roller 34 of the usualtype,

its periphery being in firm but elastic contact with that of thestencil-sheet 32, wrapped for an additional indicating device.

round the cylinder, as described. By flattening the cylinder I show the operator where to start each sheet, thereby obviating the need The said flattening also provides a recess in which the stencil-sheet fits, thereby aiding the laths and rings to hold it in place. I may arrange in front of the machine a removable feed-board of ordinary type, with a fence so adjusted as that the'paper can be fed in between the pres- The handle, which for the purpose of packing is removable, being turned, motion is imparted through the gear-wheels to the disk flattened at one point, as described,and mounted in the cylinder-rings, which thus drive the cylinder, drum, or carrier by engaging with said rings. The cock attached to the ink-reservoir is next opened allowing the ink to flow through the rectangular socket 16 and the perforations in the hollow shaft, and thus be distributed by the brush to the inside walls of the cylinder. /Vhen sufiicient ink has passed through, the supply is stopped by turning off the cock, or it may be regulatedthereby, so as to automatically maintainthe supply. To enable the ink to be thoroughly distributed before use, the pressure-roller may be removed from its bearings and the drumfreely revolved by turning the handle. The roller is now replaced and paper fed in between it and the stencil surrounding the drum, thus producing one copy per revolution. The paper is next fed in between the pressure-roller and the drum carrying thc'stencil. The drum. being turned by the handle its periphery comes intocontact with the roller gripping the paper, thus making one copy per revolution.

An important feature of myinvention is that thereis no need for the employment of roller tension-springs or the like, the weight of the cylinder being made suflicient to establish the contact-pressure necessary for making good copies, and the supply of ink is perfectly regulated in proportion to the copies required. By lifting out the drum and then turning back button'22 the hollow spindle and disk 8 are readily withdrawn therefrom and the perforations and bristles cleaned, the ink changed for another color, or duplicate parts substituted.

I claim' 1. In a stencil-printing machine, a rotary perforated cylinder flattened in one part of its circumference, in combination with a pressureroller, means .for supplying ink, a pad surrounding the said cylinder, a stencil-sheet in contact with said pad and means for holding said sheet and pad in position against the flattened part of the cylinder.

2. In a stencil-printing machine a cylinder flattened in one part of its periphery, in col bination with a stencil-sheet, means for holding said sheet-against the flattened part of thecylinder, and a pressure-rollerarranged to cooperate therewith substantially as set forth. I

3. In a stencil-printing machinaa cylinder provided with a metalplate constituting a flattened part of its periphery, 'in combination with a. stencil-sheet, means for holding it against this plate and a pr vssure-roller coopcrating with said stencil-sheet substantially as set forth.

4:. In a stencil-printing machine, acylinder flattened in a part of its periphery and having recessed rings at its ends, in combination with a pad surrounding it, a stencil-sheet in contact with said pad opposite the said flattened part, a pressure-roller cooperating with said slencil-sheet and metal laths fitting into the recesses of the said rings and holding the said sheet in position substantially as set forth.

5. In astencil-printingmachine, a rotary perforated cylinder, flattened in one part of its circumference, in combination "with a pressure r'oller means for supplying ink, a pad surrounding the said cylinder and a stencil-sheet in contact with the said pad and fitting into the recess left by the said flattening flush with the surface of the cylinder, the said construction affording an indication where to start each paper sheet substantially as set forth.

In testimony whereof I have afiixed mysignature in presence of two witnesses.

SUMMERS BROVV N. IVitnesses:

FRANCIS HERON ROGERS, F. F. McAuDLE.

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