US513212A

US513212A - Machine for printing from stencils

Info

Publication number: US513212A
Authority: US
Publication date: 1894-01-23
Anticipated expiration: 1911-01-23

Description

(No Model.) 3 Sl1eetsSheet 1.

T. H. STAOKI-IOUSE. MAGHINE FOR PRINTING PROM STENGILS.

Patented Jan. 23,1894.

WITNESSESz 1 INVENTOR a M m-A @AM a- [1 2 LITNOGRAPNING wniuuqwlv. a. c.

' (No Model.) 3 sneets -sneen 2. T. H. STAOKHOUSE. MACHINE FOR PRINTING FROM STENOILS.

No. 513,212. Patented Jan. 23 1894.

lNVliNTOR JAM flz M 2 Patenped Jan. 23, 1894.

g E in FIG. 5.

INVENTOR 0751M. fl-

OTI- T Hm n E N I H nu A M (No Model.)

WITNESS-ES:

UNITED STATES PATENT OFFICE.

THOMAS H. STAOKHOUSE, OF PHILADELPHIA, PENNSYLVANIA.

MACHINE FO'R PRINTING -FROM STENCILS.

.="'EECIFIGATION forming part of Letters Patent No. 513,212, dated January 23, 1894.

Application filed Tanuary 14:, 1893.

To all whom it may concern- Be it known that I, THOMAS H. STACK- HOUSE, a citizen of the United States, and a resident of the city and county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Machines for Printing from Stencils, of which the following is a specification.

My invention relates to improvements in machines for printing from stencils, and more particularly to improvements in reciprocating machines for printing from stencils formed upon prepared sheets of paper either by perforation or abrasion, and the object of my invention is to furnish a machine of this char acter which will be simple and inexpensive in construction, which may be operated more rapidly than machines heretofore constructed for this purpose and with less wear and danger of accident to the stencil.

My stenciling machine consists of a stationary bed plate upon which is mounted an open carriage which carries the frame which carries the the stencil. An inking roller is mounted upon arms pivoted to the bed plate and is adapted to ink the top of the stencihand a rolling platen carried upon suitable .bearings is adapted topress the paper to be printed up against the bottom of the stencil. This platen is placed preferably directly beneath the inking roller, and the inking roller and platen are so arranged as to bear,the former against. the stencil, and the latter against the paper to receive the impression from the stencil. Upon the shaft of the platen are gear wheels, and upon the carriage which carries the stencil are racks gearing into and driving these gear wheels and the platen. Upon the shaft of the inking roll are gear wheels gearing .into and driven by the gear wheels on shaft of platen. These gears are so proportioned as to drive the inking roll and platen at exactly the same speed as the carriage and stencil. Hence the stencil is never subjected to any torsional or other strains which might impair its usefulness and shorten its life.

My invention consists further in devices for separating the inking-roll and platen when the carriageis upon its backward stroke, in devices for holding and guiding the paper on its way to be printed, and for receiving it seria1ro.45s,s52. (N0 model.)

after having been printed, andin other details hereinafter fully described.

In the accom panying drawings forming part of this specification, and in which similar letters of reference indicate similar parts throughout the several views, Figure 1, is a top view or plan of my printing machine; Fig. 2, a side elevation of Fig.1; Fig. 3, a horizontal sectional elevation of Fig. 1 on line 1-2; Fig. 4, a transverse sectional elevation of Fig. 1 on line 3-4; Fig. 5, a plan of front part of paper feeding table, and" Fig. 6, a side elevation of. the central part of my machine, showing the inking roll and its connected parts thrown upward; Fig. 7, a front view of the adjustable pieces V, W, carried on the. forward ends of the arms I, L.

A, is the stationary bed plate of my ma chine which is preferably constructed of metal.

B, is a carriage mounted and adapted to slide upon the bed plate.

In the drawings I haveshown the carriage mounted and sliding upon rails 0, Figs. 1, 3 and 4, which are upon the inner part of the sides of the bed plate and which maybe cast with the bed plate, or formed separately and bolted to it.

C are clamps or guides which are secured to the lower part of the carriage and which pass around and under the rails C, as shown in Fig. 4, and prevent the carriage from being lifted from therails.

D, is a stencil holding frame. This frame is constructed of two pieces; the lower piece a being somewhat narrower than the upper piece and its upper face being furnished with a groove b, as shown in Figs. 3 and 4, and its upper part. 0 being furnished upon its lower face with a tongue cl adapted to enter the groove 1) in the lower part. The upper part c of the frame is L shaped as shown and is secured to the lower part by means of hooks e, or in any other substantial manner. The stencil is clamped and stretched between the bottom and top parts of the frame, the peculiar shape of which holds it firmly.

While I prefer to use a frame constructed as shown it will be understood that any of the and holding stencils may be used.

My device for holding the stencil frame to the carriage consists of two or more '1 shaped springs E, Figs. 1 and 3, which are carried by the forward end and preferably at opposite sides of the carriage. These springs or pieces of metal bear against the forward end and top of the frame and clamp this part of the frame securely to the carriage. The frame is prevented from moving sidewise by flanges F projecting upward from the carriage and against which the sides of the frame bear. The-rear of the frame is held down against the carriage by means of clamps G which are carried by the carriage and which are furnished with oblong heads which may be turned sidewise so as to release thisend of the frame when it may be desired to remove the frame from thecarriage. The inking roll H is carried upon arms I pivoted to the sides of the bed plate at J. Directly beneath the inking roll is a platen K, the shaft of which is carried-upon arms L whichare pivoted to the sides of :the bed plate preferably at J. arms L, and the platen are supported by, means of springs M, the upper ends of which:

bear against the lower part of the forward ends of the arms L and the lower ends of which may bear against a leg or bracket N extending from the bed plate.

side of the carriage; these racks gear into shaft of platen K.

of the stencil.

stencil along one line at one time.

by the rack; 01' the rack 0 might have teeth upon its top similarto those uponits bottom which would drive gear R and inking roll H or the rack 0 may be reversed and engage.

the gear R and thegear B would then engage the gear P. This latter construction would be preferable in certain classes of machines. During the backward stroke of the carriage the inking roll is lifted and the platen lowered so that both will be completely out of contact with the stencil.

My device for separating therolls consists The Upon the carriage B, and running lengthwise with this carriage, are racks 0, one preferably upon each of double faced cams S, one of whichis placed on each side of the bed plate, and which travels upon guides T carried by suitable brackets U carried by the frame A. Upon the arms Y'the former upon the front of the carriage, and the latter upon the rear. These tappets are adapted to engage the ends of the cam S and slide it forward or backward on the guide T. In the drawings the carriage is shown as at the forward end of its stroke, the tappet-s Y have engaged and moved forward the cams S, the inclined faces of which have engaged and lifted the engaging pieces V-W, carried by arms IL, and the ink roll and platen are moved away from the stencil. When the carriage iisdrawn back and just before it reaches the end of its stroke the tappets Y engage the forward end of camS and move this cam back allowing the arms IL to fall and thei-nk roller and platento en-j 1 arms, maybe used to draw the ink rollermore R, are gear wheels fast to shaft of inking i roll Hand which during the forward stroke of the carriage and stencil are in gear with I and driven by the gears P, but which during the return stroke of the carriage and stencil are lifted from the gears P. During the forward or printing stroke of the carriage and stencil the inking roll H bears upon'the top 1 of the stencil, and the platen K presses the paper to be printed firmly against the bottom The rack 0 drives gear wheel P and platen K at exactly the same speed. 1 Consequently there is no strain upon the stenf cil while it is in action which-would be liable f to injure it. "It will be noticed that the inking roll and platen, the latter of which is directly beneath the former, only engage the It will be I obvious that the gear wheel-R may be driven by a rack, similar to the rack 0, instead of being driven by gear wheel P which is driven firmly against the stencil. It willbe seen that by means of screws B the tension of the springs A may be regulated as desired.

A front view of the adjustable pieces V, W, is shown in Fig. 7. v

The paper feeding tableD isplaced within and at the rear of the frame forming theJ-bed plate. This table is adjustable both vertically and horizontally and it should be so placed that a continuation ofits top linewill be tangent, or nearly tangent, to the upper part of the platen roll when this latter is lowered as shown in Fig. 3.

Various devices may beemployed to make the table D adjustable. I have shown the table furnished with lugs E which project from its bottom and which are furnished with slots E E, are slots in the sides of the bed plate A, which are at right angles, or nearly so, to slots E in lugs E. E is a threaded nut or washer which screw Etenters, and by means of which and the screw, the table may be securely attached to the bed plate. The slots in the bed plate and lugs permit a movement of the table for adjustment.

F, G are adjustable paper guides carried by table D. The guide F is placed at the rear of the table and has a screw F passing through it and through a slot F in the table A thumb nut F on screw F -draws the head of this screw up against the bottom of the table, and forces the guide F against the top of the table and locks the guide at the desired point on the table, the slot F permitting the guide and screw to be moved backward or forward as may be necessary for different lengths of paper. The guide G, has a screw Gr passing through it and through a slot G placed preferably at right angles to slot F A thumb nut G operates in conjunction with screw G to lock the guide G at any point on the slot G The guide G is set either in or out as may be necessary for sheets of paper of different widths.

H, Fig. 3,is a box which is placed in front of the platen K and which receives the printed sheets of paper as they pass from the machine.

I is a handle attached to the rear part of the carriage and by means of which the carriage may be operated;

Attached to or forming part of the arms I which carry the inking roll H, is a frame J which is furnished with suitable bearings in which shafts are journale'd which carry a train of ink evening and distributing rolls K, K K K The lower rolls K K are journaled in fixed bearings in the frame J. The upper I rolls K, K may be journaled in fixed bearings in the sides of this frame, but I prefer to journal the ends of their shaft in separate pieces or bars of metal L, L which are secured in an adjustable manner to the frame J so that the upper rollers may be tightly forced against the lower rolls K K and the inking roll 11, or may be lifted entirely clear of these rolls.

In the drawings I have shown the metal pieces L L, which carry the upper rolls, furnished with threaded studs 'M which pass through slots N in the sides of the frame J. Thumb nuts 0, on threaded studs can be operated to hold the bearing pieces L so as to force the upper rolls against the lower, or to hold them entirely out of contact.

The rolls beingmade of a composition which becomes more or less soft and sticky in warm weather, it is advisable to separate them when not in use.

Ihav'e shown in the drawings a train of four ink distributing rolls; it'will be understood however that this number of rolls may be increased or diminished if desired;

In inking the roll H, the ink is first placed upon the outside roll K for instance, by dropping it upon this roll'from the tubes in which the ink is usually sold, and the roll H being lifted fromthe stencil as shown in Fig. 3, is revolved by means of a crank P, Figs. 1 and 4, which is attached to the shaft of this roll. The roll H, drives by friction the train of rolls K K K K and the ink which has been placed upon roll K is rolled out and evenly distributed upon all parts of the rollers by the time that it reaches the inking roll, upon; which it is placed in a perfectly even manner.

To remove the stencil frame from the carriage, this latter is drawn back to theend of its stroke and the arms carrying the inking roll and its connected parts are thrown back as shown in Fig. 6,in which position they are completely out of theway. The clamps G are now turned so as to release the rear end of the stencil frame, which may then be withdrawn from the springs E which secure its forward end and lifted from the carriage.

I am aware that reciprocating machines for printing from stencils have before been used, but all the machines of this kind that I am familiar with are furnished with a solidcarriage which forms the platen and which works tangentially to and drives the inking roll by the friction of the stencil passing in contact with the said roll. The strains put upon the stencil by devices of this kind are very severe and greatly shorten its life, while the printing done by them is apt to be more or less blurred and unsatisfactory. Having these defects in view I have furnished a means as hereinbefore described for independently driving the inking roll, the roll and stencil being always driven at exactly the same speed. I have also done away with the flat platen and have made my carriage with an open center, the paper to be printed being held up against the bottom of the stenoil by a rolling platen which is moved by gearing at the same speed as the stencil, and which carries the paper along with the stencil, and discharges it at the front of the machine without it being necessary to lift the stencil and its frame from its bed, as is necessary in machines of this class heretofore in use, and which has been found very objecr tionable, not only in that it takes time, but also in that the suction between the stencil and the paper, or the solid fiat platen upon which the paper rests, tends to draw and crack or tear the stencil.

In operating my device the carriage and; its connected parts are first moved forward. as shown in Fig. 3; the paper is placed upon the feeding table D; the paper guides F G having been first set to hold the rear end and one side of the paper, which projects over the forward end of the table and slightly over the platen K, as shown in Fig. 3. The carriage is now drawn back, the tappers Y engage the forward end of the cam S and move it back, and the ink roll H falls upon the stencil and the springs M lift the platen up, which forces the paper against the bottom of the stencil. The carriage is now pushed forward, themo're rapidly the better, and the ink is forced from ITO the ink roll through the stencil and the characters upon this latter are printed upon the paper during its passage over the platen. vUpon the completion of the stroke the paper can be operated by power if desired instead of by hand.

Vhile I have described my stencil carrying frame as detachably secured to the carriage I do not desire to confine myself to this construction as it, if desired, may form part of the carriage. It will be obvious that any suitable means may be employed for clamping the removable stencil frame to the carriage, and while I prefer to use the means that I have shown for this purpose, still Ido not desire to confine myself solely to these means.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In a stenciling machine, in combination, an inking roll, a platen, a stencil adapted to be reciprocated, and mechanism whereby said inking roll and platen are caused to move at the same speed as that of said stencil.

2. In a stenciling machine, in combination, astencil adapted to be reciprocated, means for supporting the same, an inking roll adapted to bear against one side of said stencil, a cylindrical platen adapted to hold the paper against the other side of said stencil, and mechanism for positively driving said inking roll and platen, at the same speed as that of said stencil.

3. In a stenciling machine, in combination, an inking roll, a cylindrical platen, and a stencil adapted to be reciprocated, means for supporting said devices, and positive gearing by which said devices are caused to move at a uniform speed.

4. In a stenciling machine, in combination, a stencil adapted to be reciprocated, an inking roll located upon one side of said stencil, a rolling platen located upon the other side of said stencil, and adapted to hold the paper up against the same, means for driving th inking roll and platen, means for bringing th e inking roll, in the movement of the stencil in one direction, into contact with the stencil, and means for throwing the inking roll, in the movement of the stencil in the opposite direction, out of contact with the stencil.

5. In a stenciling machine, in combination, a stencil adapted to be reciprocated, an inking roll located upon one side of said stencil, a rolling platen located upon the other side of said stencil and adapted to hold the paper against the same, means for driving the inking roll and platen, means for bringing th inking roll,in the movement of the stencil in one direction, into contact with the stencil and the rolling platen into contact with the paper beneath the stencil, and means for throwing the inking roll and platen, in the movement of the stencil in the opposite direction, out of contact with said stencil and paper respectively.

6. In astenciling machine,in combination, a stencil adapted to be reciprocated, an inking roll located upon one side of said stencil, a rolling platen located upon the other side of said stencil, and adapted to hold the paper against the same, mechanism for driving the inking roll and platen at the same speed as that of the stencil, means for bringing the inking roll, in the movement of the stencil in one direction, into contact with the stencil, and means for throwing the inking roll, in the movement of the stencil in the opposite direction, out of contact with said stencil.

7. In astenciling machine,in combination, a stencil adapted to be reciprocated, an inking roll located upon one side of said stencil, a rolling platen located upon the other side of said stencil and adapted to hold the paper up against the same, mechanism for driving the inking roll and platen at the same speed as that of the stencil, means for bringing the inking roll, in the movement of the stencil in one direction, into contact with the stencil and the rolling platen into contact with the paper beneath the stencil, and means for throwing the inking roll and platen, in the movement of the stencil in the, opposite direction, out of contact with said stencil and paper respectively.

8. In a stenciling machine, in combination, an inking roll, a platen, and a stencil holder adapted to be moved between said roll and platen, means for automatically throwing the inking roll into and out of contact with the stencil at predetermined points of the travel of the latter, substantially as set forth.

9. In a stenciling machine, in combination, an inking roll, a rolling platen, and a stencil holder adapted to be moved between said roll and platen, and means for automatically throwing the inking roll and rolling platen into and out of contact with the stencil at predetermined points of the travel of the latter, substantially as set forth.

10. The combination with a reciprocating carriage and means for supporting and reciprocating the same, a stencil carried by this carriage, a platen and an inking roll, of a rack or racks carried by said carriage, a gear wheel or wheels carried by shaft of said inking roll, and an intermediate gear wheel or wheels gearing into said racks and gear wheels on said inking roll.

1 1. The combination in a stenciling machine of a reciprocating carriage and means for supporting the same, a stencil frame and stencil carried by this carriage, an inking roll, a cylindrical platen, a rack carried by said carriage, a gear on the shaft of said platen engaging said rack, and a gear on the shaft of said inking roll engaging the gear on the shaft of said platen.

12. The combination in a stenciling machine of a reciprocating carriage, a bed plate upon which said carriage works, a stencil frame and stencil carried by said carriage an inking roll and cylindrical platen, arms pivoted to said bed plate and upon which the shaft of said roll and platen are carried and means substantially as described for moving said roll IZC and platen into contact with said stencil during the forward or printing movement of the latter, and for moving them out of contact with said stencil during its backward or non printing movement.

13. The combination with the bed plate, the reciprocating carriage mounted upon the bed plate and the stencil carrying frame and stencil carried by said carriage, of the inking roll and cylindrical platen, arms pivoted to said bed plate and carrying said roll and platen, springs for supporting the arms carrying said platen, guides carried by said bed plate, donble faced cams sliding on said guides, tappets carried by said carriage and adapted to move said cams and adjustable contact pieces carried by said arms and engaging the faces of said cams, all substantially as and for the purposes set forth.

14:. The combination with the inking roll and platen and the arms which carry this roll and platen of adjustable contact pieces carried by said arms, cams adapted to engage said contact pieces, guides upon which said cams slide, a reciprocating carriage and devices carried by said carriage and adapted to actuate said cams. I

15. The combinationin a stenciling machine of a reciprocating carriage, means for supporting said carriage, a stencil carried by said carriage, an inking roll and cylindrical platen and means for separating said inking roll and platen from contact with the stencil during the non printing movement of the machine.

16. The combination with the'inking roll and the arms which carry it, of a frame attached to or forming part of said arms, two or more ink distributing rolls journaled in bearings in said frame, and two or more ink distributing rolls journaled in bearings in bars adjust-ably attached to said frames and adapted to engage said lower ink distributing rolls and the main inking roll.

17. The combination with the bed plate, a reciprocating carriage and stencil carried on said bed plate, an inking roll and arms one end of which carries said inking roll and the other ends of which are pivotally attached to said bed plate, of springs one end of which is at- 19. The combination in a stenciling machine of a bed plate a carriage having an open center carried by and adapted to be reciprocated upon said bed plate, a stencil carrying frame and a stencil carried by said carriage, an ink roller adapted to ink the top of said stencil, a platen adapted to hold the paperto be printed against the bottom of said stencil, and mechanism substantially as described for driving said inking roll and said platen at the same speed and in the same direction as said stencil.

20. The combination in a stenciling machine of a bed plate, an open carriage reciprocating thereon, a stencil and frame carried by said carriage, means for clamping said stencil frame to said carriage, an inking roll, an ink mixing roll or rolls in contact with said inking roll, a cylindrical platen, a'gear wheel or wheels carried by the shaftof said platen and engaging with a rack or racks carried by said reciprocating 'carriage,agear or gears carried by the shaft of said inking roll and engaging with agear or gears carried by the shaft of said platen, arms pivoted to said bed plate and carrying said inking roll and platen,springs for supporting the arms carrying said platen, adjustable springs connecting the arms carrying said inking roll with the bed plate, guides carried by said bed-plate, double faced cams sliding on said guides, adjustable tappets carried by said carriage and adapted -to move said cams, adjustable contact pieces carried by said arms and engaging the faces of said cams, an adjustable feeding table, adjustable guides carried thereon, and a box for receiving and holding the paper after it has been printed.

THOMAS, H. STAOKHOUSE.

Witnesses:

MORRIS E. BOCKIUS, CHAS. A. BUTLER.